EP0875661A1 - Method for moving equipment in a well system - Google Patents
Method for moving equipment in a well system Download PDFInfo
- Publication number
- EP0875661A1 EP0875661A1 EP97201266A EP97201266A EP0875661A1 EP 0875661 A1 EP0875661 A1 EP 0875661A1 EP 97201266 A EP97201266 A EP 97201266A EP 97201266 A EP97201266 A EP 97201266A EP 0875661 A1 EP0875661 A1 EP 0875661A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- equipment
- well system
- well
- production
- entrance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Definitions
- the invention relates to a method for moving equipment into, through and/or from a well system for the production of hydrocarbon fluids and to a well system in which the method can be applied.
- An object of the present invention is to provide a method for moving equipment into, through and/or from a well system for the production of hydrocarbon fluids which allows an easy and safe access to the well system at any time and which results in but lower production losses.
- a method for moving equipment into, through and/or from a well system for the production of hydrocarbon fluids which well system comprises a plurality of entrance points at or near the earth surface and a system of one or more underground wellbores which provide a subsurface connection between said entrance points, the method comprising moving equipment into, through and/or from the well system via a first of said entrance points whilst production of hydrocarbon fluids takes place via another entrance point during at least part of the period that the equipment is moved into, through and/or from the well system.
- said first and any other entrance points are wellheads of hydrocarbon fluid production wells and the production of hydrocarbon fluids via the wellhead that forms the first of said entrance points is interrupted or minimized during at least part of the period that the equipment is moved into, through and/or from the well system.
- the first of said entrance points is a dedicated equipment launch and retrieval point not used for normal production operations.
- the equipment comprises drilling, services, monitoring and/or control equipment which is moved through the well system by carrier means which are connected to surface power supply and/or control facilities via an electrical, fibre optical, hydraulic, or other umbilical conduit which passes through the first of said entrance points.
- the carrier means optionally comprises plugging equipment which temporarily provides a plug which blocks or reduces flow of fluids from the well system towards the first of said entrance points during at least part of the period that the carrier means and/or other equipment are used in or moved into, through or from the well system.
- the well system comprises a plurality of entrance points at or near the earth surface and a system of underground wellbores which provides a subsurface connection between said entrance points, wherein at least a first of said entrance points is provided with means for moving equipment into, through and/or from the well system whilst production of hydrocarbon fluids takes place via another entrance point during at least part of the period that the equipment is moved into, through and/or from the well system.
- the invention also relates to a method for the phased development of such a well system.
- the method comprises drilling and completing a hydrocarbon fluid production well via a well entrance point at or near the earth surface and initiating the production of hydrocarbon fluids via that entrance point; and subsequently drilling another well via another entrance point at or near the earth surface such that the wellbores of the wells intersect and form a subsurface corridor via which equipment can be moved, wherein production of hydrocarbon fluids via the already completed well continues during at least part of the period that the other well is being drilled and/or completed.
- the process of drilling further wellbores may continue after completion of said other well whilst production via at least one entrance point continues.
- US patent specification No. 4,283,088 discloses the use of an underground working tunnel and workings from where heat injection and oil production wells are drilled into a viscous oil bearing formation by mining personnel operating in the tunnel and workings.
- the tunnel and workings are ventilated and perform as a subsurface work area from which a series of generally upwardly oriented heat injection and oil production wells are drilled.
- the tunnel and workings therefore do not form part of the well system itself.
- the well system comprises a first wellhead 1 and a second wellhead 2.
- the wellheads 1 and 2 are located at the earth surface 3 and interconnected via a system of underground wellbores.
- the system of wellbores comprises of a first and a second vertical wellbore 4 and 5 and a pair of substantially horizontal wellbores 6 and 7, which interconnect the vertical wellbores 4 and 5 at different depths.
- a pair of wellbranches 8 and 9 have been drilled from the first vertical wellbore 4 and a pair of wellbranches 10 and 11 have been drilled from the upper horizontal wellbore 6.
- the well system traverses upper and lower oil and/or gas bearing formations 12 and 13 that are shown in the drawing as shaded areas. Inflow of oil and/or gas into the well system takes place at inflow zones 14 and 15 which are depicted in the drawing as dark shaded areas.
- inflow zones 14 and 15 could each be separate oil and/or gas reservoirs.
- the well system is equipped with a series of valves 16 which in the illustration shown are closed and thereby prevent inflow of oil and/or gas into the first vertical wellbore 4 towards the first wellhead 1.
- a service equipment carrier tool 17 has been lowered into the lower horizontal wellbore 7.
- the tool 17 is connected to power and control means (not shown) at the earth surfaces 3 via an umbilical cable 18 which has been reeled into the well system from a reeling drum 19.
- the first wellhead 1 is provided with a lubricator 20 which provides a fluid tight seal around the umbilical cable 18.
- the configuration shown allows production of oil and/or gas to continue via the inflow regions 14 and the second vertical wellbore 5 towards the second wellhead 2 as illustrated by the black areas in the well system and arrows 21 while the equipment carrier tool 17 and the equipment carried thereby is moved via the first wellhead 1 into, through and from the well system.
- the service equipment carried by the carrier tool 17 may consist of logging, cleaning, maintenance, inspection drilling and/or other equipment which can be used downhole over prolonged periods while production via the second wellhead 2 continues.
- the equipment can be used both during well completion and production operations, for example for well inspection and maintenance, production monitoring (including well logging) and well inflow control, transportation of components into and from the well system, deployment of sensors and for the assembly and disassembly of downhole equipment.
- the tool 17 may be equipped with wheels or other propulsion means (not shown) and a nose section which comprises an expandable seal and which is secured to the tool body as an axially slidable plunger so that the tool can propel itself forward as a kind of inchworm into a wellsection which has not yet been isolated by a valve or other flow stopper.
- carrier tool 17 may itself be used to install or set valves 16 or sealing plugs at branch points or other locations where a temporary or permanent flow interruption is required.
- the tool may be lowered into the well system by mounting the drum 19 and lubricator 20 on top of the second wellhead 2.
- production from the lower horizontal wellbore 7 and the wellbranches 8 and 9 may continue via the first wellhead 1.
- the tool may contain its own power supply and a wireless data transmission link.
- power and or data transmission may be facilitated by transmitting an electromagnetic field via the well tubing or casing or a conductor which is permanently embedded in the well and by providing the tool 17 with an inductive coupler which serves as a movable electrical contact.
- the absence of an umbilical 18 would obviate the need for the reeling drum 19 and lubricator 20 and in such case the tool 17 can be inserted into the well system by sluices (not shown) in the wellheads 1 and 2.
- the well system may be provided with a series of downhole base points (not shown).
- Such downhole base points may be formed by areas where the wellbore and/or production tubing inside the wellbore has an enlarged diameter or side pocket which serves as a dock-in station for the tool 17 and/or the equipment carried thereby during periods when they are not in use.
- the downhole base point may be provided with dedicated links for power and communication to the surface 3. If the tool 17 and equipment are powered by batteries, the batteries can be rechanged at the base point or points. If the tool 17 and/or equipment comprise sensors and a memory for storing data gathered then the data thus gathered can be unloaded at a base point and transmitted to data processing equipment at the surface. In such case the tool 17 itself may be used to as a shuttle that reloads batteries of permanently installed sensors or other equipment in the vicinity of a base point and to unload data collected thereby and sequentially transmit such data to the surface. Furthermore the batteries of the tool itself may be used to provide power downhole, for example to set a valve or to actuate a drilling or other device.
- the use of the method and well system according to the invention is not limited to a well system with two wellheads 1 and 2 where production via one of the wellheads 2 can be continued whilst service operations are carried out via the other wellhead 1.
- the well system may also comprise three or more wellheads and only one of the wellheads may be equipped with launch and sluice means for launching equipment into the well system.
- This wellhead may for example be located at the deck of an offshore platform and be a dedicated entry point for launching equipment into the well system and for manipulating the equipment downhole, whilst no oil and/or gas is produced via this entry point during normal operations.
- the other wellheads of such a well system could be arranged subsea and produce oil and/or gas towards production facilities at the platform.
- the well system can be developed in phases.
- the well system shown in the drawing may initially be developed by drilling the second vertical well-bore 5 and the lower horizontal wellbore 7.
- first wellbore 4 is drilled and linked to the horizontal wellbores 6 and 7 such that these sections provide a downhole corridor between the vertical wellbores 4 and 5 through which equipment can be moved.
- the wellsystem can be further expanded by using re-entry drilling techniques where the equipment is moved into and from the wellsystem via one of the wellheads 1 or 2 whilst production via the other wellhead 1 or 2 continues.
- the well system may also comprise a pair of parallel or co-axial tubings in a single vertical well, which tubings are interconnected downhole via a wellbore that forms a closed loop from and towards the vertical well. If in such case the well is equipped with co-axial tubings it may generally be desirable to use the inner tubing for the transport of the carrier tool and/or other equipment into and from the well system and to use the surrounding tubing or tubings for the production of oil and/or gas.
Abstract
A method and well system are disclosed which allow
service or other equipment to be moved into, through
and/or from the well system whilst production of oil
and/or gas can continue during at least part of the
period during which the equipment is moved or used in the
well system. The well system thereto comprises a
plurality of entrance points at the earth surface and a
system of underground wellbores which provide a
subsurface connection between said entry points so that
production of oil and/or gas can continue via at least
one of said entrance points whilst equipment is moved
into, through and/or from the well system via another
entrance point.
Description
The invention relates to a method for moving
equipment into, through and/or from a well system for the
production of hydrocarbon fluids and to a well system in
which the method can be applied.
In many cases there is a need for moving equipment
into, through and/or from oil or gas production wells
after start-up of the well, for example to install or
remove a sand screen or measuring equipment, or to plug a
well section or to drill a further extension or well-branch.
Generally these activities require killing of the
well by pumping a high density liquid into the well
whereupon so-called X-mas tree can be removed from the
wellhead and the equipment can be moved into, through
and/or from the well. Occasionally it is possible to
apply an underbalanced drilling or workover technique
where the downhole fluid pressure in the well remains
lower than the reservoir fluid pressure, but in any case
the activities require extensive precautions to avoid a
blow-out and will generate substantial production losses
over a significant period of time.
An object of the present invention is to provide a
method for moving equipment into, through and/or from a
well system for the production of hydrocarbon fluids
which allows an easy and safe access to the well system
at any time and which results in but lower production
losses.
Therefore, in accordance with the invention there is
provided a method for moving equipment into, through
and/or from a well system for the production of
hydrocarbon fluids, which well system comprises a
plurality of entrance points at or near the earth surface
and a system of one or more underground wellbores which
provide a subsurface connection between said entrance
points, the method comprising moving equipment into,
through and/or from the well system via a first of said
entrance points whilst production of hydrocarbon fluids
takes place via another entrance point during at least
part of the period that the equipment is moved into,
through and/or from the well system.
Optionally, said first and any other entrance points
are wellheads of hydrocarbon fluid production wells and
the production of hydrocarbon fluids via the wellhead
that forms the first of said entrance points is
interrupted or minimized during at least part of the
period that the equipment is moved into, through and/or
from the well system.
Alternatively, the first of said entrance points is a
dedicated equipment launch and retrieval point not used
for normal production operations.
Suitably, the equipment comprises drilling, services,
monitoring and/or control equipment which is moved
through the well system by carrier means which are
connected to surface power supply and/or control
facilities via an electrical, fibre optical, hydraulic,
or other umbilical conduit which passes through the first
of said entrance points.
In such case the carrier means optionally comprises
plugging equipment which temporarily provides a plug
which blocks or reduces flow of fluids from the well
system towards the first of said entrance points during
at least part of the period that the carrier means and/or
other equipment are used in or moved into, through or
from the well system.
The well system according to the invention comprises
a plurality of entrance points at or near the earth
surface and a system of underground wellbores which
provides a subsurface connection between said entrance
points, wherein at least a first of said entrance points
is provided with means for moving equipment into, through
and/or from the well system whilst production of
hydrocarbon fluids takes place via another entrance point
during at least part of the period that the equipment is
moved into, through and/or from the well system.
The invention also relates to a method for the phased
development of such a well system. The method comprises
drilling and completing a hydrocarbon fluid production
well via a well entrance point at or near the earth
surface and initiating the production of hydrocarbon
fluids via that entrance point; and subsequently drilling
another well via another entrance point at or near the
earth surface such that the wellbores of the wells
intersect and form a subsurface corridor via which
equipment can be moved, wherein production of hydrocarbon
fluids via the already completed well continues during at
least part of the period that the other well is being
drilled and/or completed. The process of drilling further
wellbores may continue after completion of said other
well whilst production via at least one entrance point
continues.
It is observed that US patent specification
No. 4,390,067 discloses the use of a pattern of
interconnected horizontal and vertical wells in which
steam is injected to generate heated corridors in a
viscous oil bearing formation. In this known system steam
is injected via some wellheads and oil is produced, using
beam pumps installed at some of the other wellheads.
US patent specification No. 4,283,088 discloses the
use of an underground working tunnel and workings from
where heat injection and oil production wells are drilled
into a viscous oil bearing formation by mining personnel
operating in the tunnel and workings. The tunnel and
workings are ventilated and perform as a subsurface work
area from which a series of generally upwardly oriented
heat injection and oil production wells are drilled. The
tunnel and workings therefore do not form part of the
well system itself.
Furthermore, International patent application
No. PCT/GB94/00515 (publication WO 94/21889) discloses in
Fig. 2 that a U-shaped well may be used to facilitate
geothermal energy from an underlying layer to enhance the
production of fluids from an underground reservoir.
The invention will now be described in more detail
with reference to the accompanying drawing which shows a
schematic perspective view of a well system according to
the invention.
The well system comprises a first wellhead 1 and a
second wellhead 2. The wellheads 1 and 2 are located at
the earth surface 3 and interconnected via a system of
underground wellbores. The system of wellbores comprises
of a first and a second vertical wellbore 4 and 5 and a
pair of substantially horizontal wellbores 6 and 7, which
interconnect the vertical wellbores 4 and 5 at different
depths. Furthermore a pair of wellbranches 8 and 9 have
been drilled from the first vertical wellbore 4 and a
pair of wellbranches 10 and 11 have been drilled from the
upper horizontal wellbore 6.
The well system traverses upper and lower oil and/or
gas bearing formations 12 and 13 that are shown in the
drawing as shaded areas. Inflow of oil and/or gas into
the well system takes place at inflow zones 14 and 15
which are depicted in the drawing as dark shaded areas.
It is observed that the inflow zones 14 and 15 could
each be separate oil and/or gas reservoirs.
The well system is equipped with a series of valves
16 which in the illustration shown are closed and thereby
prevent inflow of oil and/or gas into the first vertical
wellbore 4 towards the first wellhead 1. A service
equipment carrier tool 17 has been lowered into the lower
horizontal wellbore 7.
The tool 17 is connected to power and control means
(not shown) at the earth surfaces 3 via an umbilical
cable 18 which has been reeled into the well system from
a reeling drum 19. The first wellhead 1 is provided with
a lubricator 20 which provides a fluid tight seal around
the umbilical cable 18.
The configuration shown allows production of oil
and/or gas to continue via the inflow regions 14 and the
second vertical wellbore 5 towards the second wellhead 2
as illustrated by the black areas in the well system and
arrows 21 while the equipment carrier tool 17 and the
equipment carried thereby is moved via the first
wellhead 1 into, through and from the well system.
The service equipment carried by the carrier tool 17
may consist of logging, cleaning, maintenance, inspection
drilling and/or other equipment which can be used
downhole over prolonged periods while production via the
second wellhead 2 continues. The equipment can be used
both during well completion and production operations,
for example for well inspection and maintenance,
production monitoring (including well logging) and well
inflow control, transportation of components into and
from the well system, deployment of sensors and for the
assembly and disassembly of downhole equipment.
The tool 17 may be equipped with wheels or other
propulsion means (not shown) and a nose section which
comprises an expandable seal and which is secured to the
tool body as an axially slidable plunger so that the tool
can propel itself forward as a kind of inchworm into a
wellsection which has not yet been isolated by a valve or
other flow stopper.
Furthermore the carrier tool 17 may itself be used to
install or set valves 16 or sealing plugs at branch
points or other locations where a temporary or permanent
flow interruption is required.
If access to the well system via the second wellhead
2 is needed, for example if service or other
operations are to be carried out in the wellbranches 11,
the tool may be lowered into the well system by mounting
the drum 19 and lubricator 20 on top of the second
wellhead 2.
In such case production from the lower horizontal
wellbore 7 and the wellbranches 8 and 9 may continue via
the first wellhead 1.
It will be understood that instead of using an
umbilical 18 for power supply to and data transmission
from and to the tool 17 and the equipment carried thereby
the tool may contain its own power supply and a wireless
data transmission link.
Furthermore, power and or data transmission may be
facilitated by transmitting an electromagnetic field via
the well tubing or casing or a conductor which is
permanently embedded in the well and by providing the
tool 17 with an inductive coupler which serves as a
movable electrical contact. The absence of an
umbilical 18 would obviate the need for the reeling
drum 19 and lubricator 20 and in such case the tool 17
can be inserted into the well system by sluices (not
shown) in the wellheads 1 and 2.
In order to avoid the use of an umbilical cable 18
and/or frequent insertion of the tool 17 into the well
system and removal therefrom the well system may be
provided with a series of downhole base points (not
shown). Such downhole base points may be formed by areas
where the wellbore and/or production tubing inside the
wellbore has an enlarged diameter or side pocket which
serves as a dock-in station for the tool 17 and/or the
equipment carried thereby during periods when they are
not in use.
The downhole base point may be provided with
dedicated links for power and communication to the
surface 3. If the tool 17 and equipment are powered by
batteries, the batteries can be rechanged at the base
point or points. If the tool 17 and/or equipment comprise
sensors and a memory for storing data gathered then the
data thus gathered can be unloaded at a base point and
transmitted to data processing equipment at the surface.
In such case the tool 17 itself may be used to as a
shuttle that reloads batteries of permanently installed
sensors or other equipment in the vicinity of a base
point and to unload data collected thereby and
sequentially transmit such data to the surface.
Furthermore the batteries of the tool itself may be used
to provide power downhole, for example to set a valve or
to actuate a drilling or other device.
The use of the method and well system according to
the invention is not limited to a well system with two
wellheads 1 and 2 where production via one of the wellheads
2 can be continued whilst service operations are
carried out via the other wellhead 1. The well system may
also comprise three or more wellheads and only one of the
wellheads may be equipped with launch and sluice means
for launching equipment into the well system. This
wellhead may for example be located at the deck of an
offshore platform and be a dedicated entry point for
launching equipment into the well system and for
manipulating the equipment downhole, whilst no oil and/or
gas is produced via this entry point during normal
operations. The other wellheads of such a well system
could be arranged subsea and produce oil and/or gas
towards production facilities at the platform. In such
case chemicals, steam or other injection fluids may be
injected into the well system via the equipment entry
point and in case processing facilities at the platform
are occasionally overloaded or out of service oil and/or
gas could be reinjected into the well system via the
equipment entry point. If a tool 17 is to be inserted
into a subsea wellhead this may be accomplished by using
an underwater vehicle.
It will also be understood that the well system can
be developed in phases. The well system shown in the
drawing may initially be developed by drilling the second
vertical well-bore 5 and the lower horizontal wellbore 7.
On the basis of downhole reservoir imaging techniques
carried out from the already drilled wellbores 5 and 7
the upper horizontal wellbore and wellbranches 10 and 11
are drilled accurately into the reservoir formation(s).
Subsequently production of oil and/or gas is started
via the second wellhead 2 and accurate production and
reservoir data can be collected. After evaluating these
data the first wellbore 4 is drilled and linked to the
horizontal wellbores 6 and 7 such that these sections
provide a downhole corridor between the vertical
wellbores 4 and 5 through which equipment can be moved.
Then it is possible to further expand the wellsystem
by drilling and completing the wellbranches 8 and 9
whilst production of oil or gas continues via the second
wellhead 2.
Subsequent to commencing oil or gas production via
both wellheads 1 and 2 the wellsystem can be further
expanded by using re-entry drilling techniques where the
equipment is moved into and from the wellsystem via one
of the wellheads 1 or 2 whilst production via the other
wellhead 1 or 2 continues.
Thus production constraints can be removed
continuously and the flow performance of the wells can be
optimized at any time. Development flexibility may also
be improved by connecting one well with spare vertical
flow capacity to the production face of an adjacent well
where production is restricted by vertical flow
constraints.
Furthermore, the wellheads need not to be spaced
apart as illustrated in the drawing. The well system may
also comprise a pair of parallel or co-axial tubings in a
single vertical well, which tubings are interconnected
downhole via a wellbore that forms a closed loop from and
towards the vertical well. If in such case the well is
equipped with co-axial tubings it may generally be
desirable to use the inner tubing for the transport of
the carrier tool and/or other equipment into and from the
well system and to use the surrounding tubing or tubings
for the production of oil and/or gas.
These and other features, objects and advantages of
the method and system according to the present invention
will become apparent from and/or are further disclosed in
the accompanying claims, abstract and drawing.
Claims (8)
- A method for moving equipment into, through and/or from a well system for the production of hydrocarbon fluids, which well system comprises a plurality of entrance points at or near the earth surface and a system of one or more underground wellbores which provide a subsurface connection between said entrance points, the method comprising moving equipment into, through and/or from the well system via a first of said entrance points whilst production of hydrocarbon fluids takes place via another entrance point during at least part of the period that the equipment is moved into, through and/or from the well system.
- The method of claim 1, wherein said first and any other entrance points are wellheads of hydrocarbon fluid production wells and the production of hydrocarbon fluids via the wellhead that forms the first of said entrance points is interrupted or minimized during at least part of the period that the equipment is moved into, through and/or from the well system.
- The method of claim 1 or 2, wherein the equipment consists of drilling, service, maintenance, monitoring and/or control equipment which is moved through the well system by carrier means which are connected to surface power supply and/or control facilities via an electrical, fibre optical hydraulic, or other umbilical conduit which passes through the first of said entrance points.
- The method of claim 3, wherein the carrier means are provided with plugging equipment which temporarily provides a plug which blocks or reduces flow of fluids from the well system towards the first of said entrance points during at least part of the period that the carrier means and/or other equipment are used in or moved into, through or from the well system.
- A well system for production of hydrocarbon fluids which comprises a plurality of entrance points at the earth surface and a system of underground wellbores which provides a subsurface connection between said entrance points, wherein at least a first of said entrance points is provided with means for moving equipment into, through and/or from the well system whilst production of hydrocarbon fluids takes place via another entrance point during at least part of the period that the equipment is moved into, through and/or from the well system.
- The well system of claim 5, wherein the entrance points are mutually spaced and the system of underground wellbores comprises at least one central wellbore which provides a subsurface connection between at least two entrance points through which equipment can be moved and optionally a number of wellbranches which are directly or indirectly connected to a central wellbore.
- The well system of claim 6, wherein the system comprises a number of downhole base points in which equipment and/or carrier means can be docked while production of hydrocarbon fluids via the well system takes place and in which battery packs of the equipment and/or carrier means can be reloaded and data gathered by the equipment and/or carrier means can be unloaded and transmitted to data processing equipment at the earth surface.
- A method for the phased development of a well system according to claim 5 or 6, the method comprising drilling and completing a hydrocarbon fluid production well via a well entrance point at or near the earth surface and initiating the production of hydrocarbon fluids via that entrance point; and subsequently drilling another well via another entrance point at or near the earth surface such that the wellbores of the wellbores of the wells intersect and form a subsurface corridor via which equipment can be moved, wherein production of hydrocarbon fluids via the already completed well continues during at least part of the period that the other well is being drilled and/or completed.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97201266A EP0875661A1 (en) | 1997-04-28 | 1997-04-28 | Method for moving equipment in a well system |
EG41998A EG21404A (en) | 1997-04-28 | 1998-04-18 | Method for moving equipment in a well system |
ARP980101900 AR012500A1 (en) | 1997-04-28 | 1998-04-24 | METHOD FOR USING A DEVICE IN A SET OF WELLS AND SET OF WELLS USING IT |
EP98925514A EP0980463A1 (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
PCT/EP1998/002578 WO1998049424A1 (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
EA199900978A EA000922B1 (en) | 1997-04-28 | 1998-04-27 | Method for using equipment in a well system, well system and method for a phased development |
IDW991280A ID22927A (en) | 1997-04-28 | 1998-04-27 | USE OF EQUIPMENT IN WELL SYSTEM |
CA002285476A CA2285476C (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
AU77607/98A AU730212B2 (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
CN98804394A CN1091833C (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
NO995247A NO995247L (en) | 1997-04-28 | 1999-10-27 | Use of equipment in a well system |
OA9900237A OA11210A (en) | 1997-04-28 | 1999-10-28 | Using equipment in a well system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97201266A EP0875661A1 (en) | 1997-04-28 | 1997-04-28 | Method for moving equipment in a well system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0875661A1 true EP0875661A1 (en) | 1998-11-04 |
Family
ID=8228268
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97201266A Withdrawn EP0875661A1 (en) | 1997-04-28 | 1997-04-28 | Method for moving equipment in a well system |
EP98925514A Withdrawn EP0980463A1 (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98925514A Withdrawn EP0980463A1 (en) | 1997-04-28 | 1998-04-27 | Using equipment in a well system |
Country Status (11)
Country | Link |
---|---|
EP (2) | EP0875661A1 (en) |
CN (1) | CN1091833C (en) |
AR (1) | AR012500A1 (en) |
AU (1) | AU730212B2 (en) |
CA (1) | CA2285476C (en) |
EA (1) | EA000922B1 (en) |
EG (1) | EG21404A (en) |
ID (1) | ID22927A (en) |
NO (1) | NO995247L (en) |
OA (1) | OA11210A (en) |
WO (1) | WO1998049424A1 (en) |
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WO2000031376A2 (en) * | 1998-11-20 | 2000-06-02 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
US6412556B1 (en) | 2000-08-03 | 2002-07-02 | Cdx Gas, Inc. | Cavity positioning tool and method |
US6425448B1 (en) | 2001-01-30 | 2002-07-30 | Cdx Gas, L.L.P. | Method and system for accessing subterranean zones from a limited surface area |
WO2002061238A1 (en) * | 2001-01-30 | 2002-08-08 | Cdx Gas, L.L.C. | Method and system for accessing a subterranean zone from a limited surface area |
US6454000B1 (en) | 1999-11-19 | 2002-09-24 | Cdx Gas, Llc | Cavity well positioning system and method |
US6598686B1 (en) | 1998-11-20 | 2003-07-29 | Cdx Gas, Llc | Method and system for enhanced access to a subterranean zone |
US6679322B1 (en) | 1998-11-20 | 2004-01-20 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
US6681855B2 (en) | 2001-10-19 | 2004-01-27 | Cdx Gas, L.L.C. | Method and system for management of by-products from subterranean zones |
US6708764B2 (en) | 2002-07-12 | 2004-03-23 | Cdx Gas, L.L.C. | Undulating well bore |
US6725922B2 (en) | 2002-07-12 | 2004-04-27 | Cdx Gas, Llc | Ramping well bores |
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US8291974B2 (en) | 1998-11-20 | 2012-10-23 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
US8333245B2 (en) | 2002-09-17 | 2012-12-18 | Vitruvian Exploration, Llc | Accelerated production of gas from a subterranean zone |
CN102900404A (en) * | 2012-11-01 | 2013-01-30 | 中国海洋石油总公司 | Method for exploiting naked eye type manmade migration channels between gas pools |
CN102900403A (en) * | 2012-11-01 | 2013-01-30 | 中国海洋石油总公司 | Method for establishing artificial natural gas migration channel between gas reservoirs |
CN102913205A (en) * | 2012-11-01 | 2013-02-06 | 中国海洋石油总公司 | Method for building uncased-hole gravel-filled artificial migration passage between gas reservoirs |
US8376039B2 (en) | 1998-11-20 | 2013-02-19 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
US8376052B2 (en) | 1998-11-20 | 2013-02-19 | Vitruvian Exploration, Llc | Method and system for surface production of gas from a subterranean zone |
US8434568B2 (en) | 1998-11-20 | 2013-05-07 | Vitruvian Exploration, Llc | Method and system for circulating fluid in a well system |
CN106545296A (en) * | 2016-12-02 | 2017-03-29 | 淮北矿业股份有限公司 | A kind of surface drilling grouting treatment method of deep mining coal seam base plate limestone water damage |
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- 1998-04-27 AU AU77607/98A patent/AU730212B2/en not_active Ceased
- 1998-04-27 CA CA002285476A patent/CA2285476C/en not_active Expired - Lifetime
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- 1998-04-27 ID IDW991280A patent/ID22927A/en unknown
- 1998-04-27 WO PCT/EP1998/002578 patent/WO1998049424A1/en not_active Application Discontinuation
- 1998-04-27 CN CN98804394A patent/CN1091833C/en not_active Expired - Fee Related
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US9551209B2 (en) | 1998-11-20 | 2017-01-24 | Effective Exploration, LLC | System and method for accessing subterranean deposits |
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US6478085B2 (en) | 1998-11-20 | 2002-11-12 | Cdx Gas, Llp | System for accessing subterranean deposits from the surface |
US6561288B2 (en) | 1998-11-20 | 2003-05-13 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
US6575235B2 (en) | 1998-11-20 | 2003-06-10 | Cdx Gas, Llc | Subterranean drainage pattern |
US6598686B1 (en) | 1998-11-20 | 2003-07-29 | Cdx Gas, Llc | Method and system for enhanced access to a subterranean zone |
US6604580B2 (en) | 1998-11-20 | 2003-08-12 | Cdx Gas, Llc | Method and system for accessing subterranean zones from a limited surface area |
US8464784B2 (en) | 1998-11-20 | 2013-06-18 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
US6668918B2 (en) | 1998-11-20 | 2003-12-30 | Cdx Gas, L.L.C. | Method and system for accessing subterranean deposit from the surface |
US8434568B2 (en) | 1998-11-20 | 2013-05-07 | Vitruvian Exploration, Llc | Method and system for circulating fluid in a well system |
US8376052B2 (en) | 1998-11-20 | 2013-02-19 | Vitruvian Exploration, Llc | Method and system for surface production of gas from a subterranean zone |
US6688388B2 (en) | 1998-11-20 | 2004-02-10 | Cdx Gas, Llc | Method for accessing subterranean deposits from the surface |
US8376039B2 (en) | 1998-11-20 | 2013-02-19 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
WO2000031376A2 (en) * | 1998-11-20 | 2000-06-02 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
US6732792B2 (en) | 1998-11-20 | 2004-05-11 | Cdx Gas, Llc | Multi-well structure for accessing subterranean deposits |
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WO2000031376A3 (en) * | 1998-11-20 | 2001-01-04 | Cdx Gas Llc | Method and system for accessing subterranean deposits from the surface |
US6679322B1 (en) | 1998-11-20 | 2004-01-20 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
US8291974B2 (en) | 1998-11-20 | 2012-10-23 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
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US8297377B2 (en) | 1998-11-20 | 2012-10-30 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
US6454000B1 (en) | 1999-11-19 | 2002-09-24 | Cdx Gas, Llc | Cavity well positioning system and method |
US6412556B1 (en) | 2000-08-03 | 2002-07-02 | Cdx Gas, Inc. | Cavity positioning tool and method |
WO2002061238A1 (en) * | 2001-01-30 | 2002-08-08 | Cdx Gas, L.L.C. | Method and system for accessing a subterranean zone from a limited surface area |
WO2002061233A1 (en) * | 2001-01-30 | 2002-08-08 | Cdx Gas, L.L.C. | Method and system for accessing subterranean zones from a limited surface area |
US6662870B1 (en) | 2001-01-30 | 2003-12-16 | Cdx Gas, L.L.C. | Method and system for accessing subterranean deposits from a limited surface area |
US6425448B1 (en) | 2001-01-30 | 2002-07-30 | Cdx Gas, L.L.P. | Method and system for accessing subterranean zones from a limited surface area |
US6681855B2 (en) | 2001-10-19 | 2004-01-27 | Cdx Gas, L.L.C. | Method and system for management of by-products from subterranean zones |
US6708764B2 (en) | 2002-07-12 | 2004-03-23 | Cdx Gas, L.L.C. | Undulating well bore |
US6725922B2 (en) | 2002-07-12 | 2004-04-27 | Cdx Gas, Llc | Ramping well bores |
US8333245B2 (en) | 2002-09-17 | 2012-12-18 | Vitruvian Exploration, Llc | Accelerated production of gas from a subterranean zone |
WO2005003509A1 (en) * | 2003-06-30 | 2005-01-13 | Petroleo Brasileiro S A-Petrobras | Method for, and the construction of, a long-distance well for the production, transport, storage and exploitation of mineral layers and fluids |
US7637316B2 (en) | 2005-11-16 | 2009-12-29 | Shell Oil Company | Wellbore system |
WO2007057378A1 (en) * | 2005-11-16 | 2007-05-24 | Shell Internationale Research Maatschappij B.V. | Wellbore system |
CN102913205A (en) * | 2012-11-01 | 2013-02-06 | 中国海洋石油总公司 | Method for building uncased-hole gravel-filled artificial migration passage between gas reservoirs |
CN102900403B (en) * | 2012-11-01 | 2014-05-07 | 中国海洋石油总公司 | Method for establishing artificial natural gas migration channel between gas reservoirs |
CN102900403A (en) * | 2012-11-01 | 2013-01-30 | 中国海洋石油总公司 | Method for establishing artificial natural gas migration channel between gas reservoirs |
CN102900404A (en) * | 2012-11-01 | 2013-01-30 | 中国海洋石油总公司 | Method for exploiting naked eye type manmade migration channels between gas pools |
CN106545296A (en) * | 2016-12-02 | 2017-03-29 | 淮北矿业股份有限公司 | A kind of surface drilling grouting treatment method of deep mining coal seam base plate limestone water damage |
Also Published As
Publication number | Publication date |
---|---|
NO995247L (en) | 1999-11-17 |
ID22927A (en) | 1999-12-16 |
CA2285476C (en) | 2006-11-21 |
EA199900978A1 (en) | 2000-06-26 |
WO1998049424A1 (en) | 1998-11-05 |
EP0980463A1 (en) | 2000-02-23 |
AR012500A1 (en) | 2000-10-18 |
CA2285476A1 (en) | 1998-11-05 |
EA000922B1 (en) | 2000-06-26 |
NO995247D0 (en) | 1999-10-27 |
OA11210A (en) | 2003-07-18 |
EG21404A (en) | 2001-10-31 |
AU7760798A (en) | 1998-11-24 |
AU730212B2 (en) | 2001-03-01 |
CN1252851A (en) | 2000-05-10 |
CN1091833C (en) | 2002-10-02 |
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