WO2010095947A1 - Method and device for pressure regulation of a well - Google Patents
Method and device for pressure regulation of a well Download PDFInfo
- Publication number
- WO2010095947A1 WO2010095947A1 PCT/NO2010/000050 NO2010000050W WO2010095947A1 WO 2010095947 A1 WO2010095947 A1 WO 2010095947A1 NO 2010000050 W NO2010000050 W NO 2010000050W WO 2010095947 A1 WO2010095947 A1 WO 2010095947A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drilling
- fluid
- pressure
- return path
- well
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 115
- 238000005553 drilling Methods 0.000 claims abstract description 70
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 32
- 238000005086 pumping Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 238000005755 formation reaction Methods 0.000 description 26
- 230000003068 static effect Effects 0.000 description 15
- 208000010392 Bone Fractures Diseases 0.000 description 10
- 206010017076 Fracture Diseases 0.000 description 10
- 239000011148 porous material Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical group [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
Definitions
- This invention relates to a method for the pressure regulation of a well. More particularly, it relates to a method for the pressure regulation of a well extending into a well for- mation and being drilled from a vessel at sea, the well including a blowout preventer on the seabed and a riser extending from the blowout preventer up to the vessel, and the return path of the drilling fluid being provided with a rotating surface seal sealingly surrounding a drill string, the rotating surface seal being arranged to seal against a pressure difference between the surroundings and the return path, and there being arranged a closable drilling- fluid outlet at the rotating surface seal.
- the invention also includes a device for practising the method.
- the specific weight of the drilling fluid is adjusted to be such that the pressure head of the drilling- fluid column resists the pore pressure, preventing well fluid from entering the borehole during drilling.
- drilling fluid must also be able to fill other functions. For example, it must be relatively viscous to carry cuttings up to the surface.
- the drilling-fluid pressure in the formation is made up of, inter alia, the static pressure from the fluid column and a dynamic pressure, the so-called frictional pressure, from the flowing drilling fluid.
- the static pressure from the drilling fluid must, as mentioned above, be sufficiently large to prevent inflow of well fluid from the well formation, but not so large that it exceeds the fracture pressure so that drilling fluid will flow into the well formation.
- the frictional pressure may, when there is little difference between the pore pressure and the fracture pressure, make the fracture pressure be exceeded. Drilling fluid may then flow into the formation. Apart from the loss of relatively expensive drilling fluid, such outflow, often termed “lost circulation” , may also entail damage to the formation, for example cause reduced production later on, and also considerable time lost in connection with the drilling operation.
- NO patent 319213 discloses a method in which the return path is filled with a fluid which has a lower specific weight than the drilling fluid.
- the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art .
- the method is characterised by including:
- drilling can be carried out in a manner known per se, by the closable drilling-fluid outlet being opened. Drilling fluid thereby flows back via the return path, which is formed, in this preferred embodiment, by inter alia an an- nulus between the riser and the drill string. Since chokes are unnecessary in the return path, the return drilling fluid may flow freely in the return path.
- the closable drilling- fluid outlet may be closed in order thereby to be able to establish an overpressure or underpressure in the return pipe relative to the surroundings.
- the static pressure in the well formation can be reduced immediately, for example by the drilling- fluid level being lowered in the return path, whereby an underpressure is established in the upper portion of the return path.
- Cuttings and drilling fluid may thus be circulated out of the well, also when the fluid column in the return path is at a lower height level, so that drilling fluid can no longer flow out via the closable drilling-fluid outlet.
- At least a portion of the return path that is above the pump inlet may be filled with a second fluid of a different specific weight, normally lower, in relation to the drilling fluid.
- the static pressure from the fluid column may thereby be adjusted to wells in which both the formation pressure and the fracture pressure are relatively low.
- the pumping rate may be controlled also to keep the interface between the drilling fluid and the second fluid at an approximately constant height level .
- the method may be practised by means of a pressure-regulation device for a well extending into a well formation and being drilled from a vessel at sea, the well including a blowout preventer on the seabed and a riser extending from the blow- out preventer up to the vessel, and the drilling- fluid return path being provided with a rotating surface seal surrounding a drill string, the rotating surface seal being arranged to seal against a pressure difference between the surroundings and the return path, and there being arranged a closable drilling- fluid outlet at the rotating surface seal, and the pressure-regulation device being characterized by a pump inlet from the return path being arranged under water and a pump being connected to the return path, the pump being connected to a pipe which discharges on the vessel, the pumping rate being adjustable to maintain a substantially constant drilling-fluid pressure in the well formation, both when drilling fluid is flowing and when it has
- At least a portion of the return path that is above the pump inlet may be filled with a second fluid which has a different specific weight in relation to the drilling fluid.
- a physical partition for example in the form of a piston- like component, may be arranged between the drilling fluid and the second fluid.
- the device When the closable drilling-fluid outlet is open, the device corresponds to what is described in NO 319213.
- the pumping rate may be controllable to be able to keep an interface between the drilling fluid and the second fluid at an approximately constant height level .
- Known methods that include a rotatable surface seal are formed to utilise a static pressure from the drilling fluid at the formation, the static pressure being selected to be suitable when there is circulation of drilling fluid.
- the fluid column is subjected to extra pressure to prevent inflow of well fluid when the drilling-fluid circulation is stopped. This makes it difficult to open the system to replace a rotating seal and so on.
- the static pressure may be adjusted to the formation pressure of the well formation when there is no circulation of drilling fluid, and this static pressure may be reduced by means of the pump to avoid exceeding the fracture pressure as circulation is started.
- the system may then freely be opened as the drilling fluid itself maintains a sufficient static pressure in the formation, as in conventional drilling.
- the method and the device according to the invention also render a rotating seal in the riser or at the seabed superfluous. Such seals must be pulled out every time the drill pipe is to be pulled out, which is both complicated and time- consuming.
- Figure 1 shows schematically a section of a well in accordance with the invention.
- Figure 2 shows schematically a section of a well in accor- dance with the invention in an alternative embodiment .
- the reference numeral 1 indicates a well which extends down into a well formation 2 and in which a drill string 4, which is provided with a drill bit 6, extends from a vessel not shown into the well formation 2.
- a casing 8 is connected to a blowout preventer 10 on the seabed 12.
- a riser 14 enclosing the drill string 4 extends from the vessel, not shown, down through the sea surface 16 to the blowout preventer 10.
- the riser 14 is suspended from the vessel not shown by means of a riser tensioner 18, the telescopic pipe 20 of the riser 14 being provided with a rotatable surface seal 22.
- the rotatable surface seal 22 is arranged to seal against the drill string 4 also when the drill string 4 is rotating.
- the casing 8, riser 14 and telescopic pipe 20 form a return path for a drilling fluid 24.
- the telescopic pipe 20 is provided with a drilling-fluid outlet 28 closable by means of a valve 26.
- a pump 30 is connected to a pump inlet 32 on the riser 14 and to a pressure pipe 34 extending to the vessel not shown.
- a pressure gauge 36 communicates with the riser 14 at the pump inlet 32.
- drilling fluid may return via the return path 8, 14, 20 and flow out via the closable drilling- fluid outlet 28. If measurements should show that drilling fluid 24 is entering the well formation 2, the pump 30 may be started while, at the same time, the closable drilling-fluid outlet 28 is closed by means of the valve 26.
- the static pressure from the drilling-fluid column is reduced by reducing the drilling- fluid column height, whereby the fracture pressure is no longer exceeded.
- the static pressure is increased by stopping or reducing the flow rate through the pump 30 to prevent the entrance of well fluid from the well formation 2.
- the height position of the pump inlet 32 is determined from the prevailing pressure conditions in the well formation 2, the maximum pressure reduction achievable being the pressure head of the of the drilling-fluid column between the ro- tatable surface seal 22 and the pump inlet 32.
- a second fluid 38 which has a different specific weight in relation to the drilling fluid 24.
- An interface 40 is established between the drilling fluid 24 and the second fluid 38, see figure 2.
- valve 2 ⁇ If the valve 2 ⁇ is open, the device functions in a manner corresponding to the method according to NO 319213 in which the advantages of a so-called dual-gradient system is described.
- the method according to NO 319213 does not include a rotatable surface seal 22.
- this alternative method makes it possible for a relatively rapid change of the static pressure in the drilling fluid to take place.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI1008074A BRPI1008074A2 (en) | 2009-02-18 | 2010-02-11 | Method and device for regulating a well pressure |
US13/201,554 US20110297388A1 (en) | 2009-02-18 | 2010-02-11 | Method and device for pressure regulation of a well |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20090767A NO329687B1 (en) | 2009-02-18 | 2009-02-18 | Method and apparatus for pressure regulating a well |
NO20090767 | 2009-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010095947A1 true WO2010095947A1 (en) | 2010-08-26 |
Family
ID=42634067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2010/000050 WO2010095947A1 (en) | 2009-02-18 | 2010-02-11 | Method and device for pressure regulation of a well |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110297388A1 (en) |
BR (1) | BRPI1008074A2 (en) |
NO (1) | NO329687B1 (en) |
WO (1) | WO2010095947A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8201628B2 (en) | 2010-04-27 | 2012-06-19 | Halliburton Energy Services, Inc. | Wellbore pressure control with segregated fluid columns |
US8281875B2 (en) | 2008-12-19 | 2012-10-09 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US8776894B2 (en) | 2006-11-07 | 2014-07-15 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US8820405B2 (en) | 2010-04-27 | 2014-09-02 | Halliburton Energy Services, Inc. | Segregating flowable materials in a well |
US8833488B2 (en) | 2011-04-08 | 2014-09-16 | Halliburton Energy Services, Inc. | Automatic standpipe pressure control in drilling |
US9080407B2 (en) | 2011-05-09 | 2015-07-14 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US9169700B2 (en) | 2010-02-25 | 2015-10-27 | Halliburton Energy Services, Inc. | Pressure control device with remote orientation relative to a rig |
US9567843B2 (en) | 2009-07-30 | 2017-02-14 | Halliburton Energy Services, Inc. | Well drilling methods with event detection |
US9605507B2 (en) | 2011-09-08 | 2017-03-28 | Halliburton Energy Services, Inc. | High temperature drilling with lower temperature rated tools |
US9823373B2 (en) | 2012-11-08 | 2017-11-21 | Halliburton Energy Services, Inc. | Acoustic telemetry with distributed acoustic sensing system |
US10724315B2 (en) | 2015-02-25 | 2020-07-28 | Managed Pressure Operations Pte. Ltd. | Modified pumped riser solution |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8783358B2 (en) * | 2011-09-16 | 2014-07-22 | Chevron U.S.A. Inc. | Methods and systems for circulating fluid within the annulus of a flexible pipe riser |
BR112015008014B1 (en) * | 2012-10-15 | 2016-09-27 | Nat Oilwell Varco Lp | double gradient drilling system and method |
US9194225B2 (en) * | 2012-11-07 | 2015-11-24 | Chevron U.S.A. Inc. | Systems and methods for sensing a fluid level within a pipe |
NO338020B1 (en) | 2013-09-10 | 2016-07-18 | Mhwirth As | A deep water drill riser pressure relief system comprising a pressure release device, as well as use of the pressure release device. |
US9500035B2 (en) | 2014-10-06 | 2016-11-22 | Chevron U.S.A. Inc. | Integrated managed pressure drilling transient hydraulic model simulator architecture |
US10538986B2 (en) * | 2017-01-16 | 2020-01-21 | Ensco International Incorporated | Subsea pressure reduction manifold |
US10988997B2 (en) * | 2018-01-22 | 2021-04-27 | Safekick Americas Llc | Method and system for safe pressurized mud cap drilling |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000039431A1 (en) * | 1998-12-29 | 2000-07-06 | Elf Exploration Production | Method and device for adjusting at a set value the bore fluid level in the riser |
US6263982B1 (en) * | 1998-03-02 | 2001-07-24 | Weatherford Holding U.S., Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
US6668943B1 (en) * | 1999-06-03 | 2003-12-30 | Exxonmobil Upstream Research Company | Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser |
US20040065440A1 (en) * | 2002-10-04 | 2004-04-08 | Halliburton Energy Services, Inc. | Dual-gradient drilling using nitrogen injection |
US20040238177A1 (en) * | 2001-09-10 | 2004-12-02 | Borre Fossli | Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells |
US20080105434A1 (en) * | 2006-11-07 | 2008-05-08 | Halliburton Energy Services, Inc. | Offshore Universal Riser System |
WO2009123476A1 (en) * | 2008-04-04 | 2009-10-08 | Ocean Riser Systems As | Systems and methods for subsea drilling |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4063602A (en) * | 1975-08-13 | 1977-12-20 | Exxon Production Research Company | Drilling fluid diverter system |
US6457529B2 (en) * | 2000-02-17 | 2002-10-01 | Abb Vetco Gray Inc. | Apparatus and method for returning drilling fluid from a subsea wellbore |
MX2009013067A (en) * | 2007-06-01 | 2010-05-27 | Agr Deepwater Dev Systems Inc | Dual density mud return system. |
-
2009
- 2009-02-18 NO NO20090767A patent/NO329687B1/en not_active IP Right Cessation
-
2010
- 2010-02-11 BR BRPI1008074A patent/BRPI1008074A2/en not_active IP Right Cessation
- 2010-02-11 US US13/201,554 patent/US20110297388A1/en not_active Abandoned
- 2010-02-11 WO PCT/NO2010/000050 patent/WO2010095947A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6263982B1 (en) * | 1998-03-02 | 2001-07-24 | Weatherford Holding U.S., Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
WO2000039431A1 (en) * | 1998-12-29 | 2000-07-06 | Elf Exploration Production | Method and device for adjusting at a set value the bore fluid level in the riser |
US6668943B1 (en) * | 1999-06-03 | 2003-12-30 | Exxonmobil Upstream Research Company | Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser |
US20040238177A1 (en) * | 2001-09-10 | 2004-12-02 | Borre Fossli | Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells |
US20040065440A1 (en) * | 2002-10-04 | 2004-04-08 | Halliburton Energy Services, Inc. | Dual-gradient drilling using nitrogen injection |
US20080105434A1 (en) * | 2006-11-07 | 2008-05-08 | Halliburton Energy Services, Inc. | Offshore Universal Riser System |
WO2009123476A1 (en) * | 2008-04-04 | 2009-10-08 | Ocean Riser Systems As | Systems and methods for subsea drilling |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9051790B2 (en) | 2006-11-07 | 2015-06-09 | Halliburton Energy Services, Inc. | Offshore drilling method |
US9157285B2 (en) | 2006-11-07 | 2015-10-13 | Halliburton Energy Services, Inc. | Offshore drilling method |
US9127512B2 (en) | 2006-11-07 | 2015-09-08 | Halliburton Energy Services, Inc. | Offshore drilling method |
US9127511B2 (en) | 2006-11-07 | 2015-09-08 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US8776894B2 (en) | 2006-11-07 | 2014-07-15 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US9376870B2 (en) | 2006-11-07 | 2016-06-28 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US8887814B2 (en) | 2006-11-07 | 2014-11-18 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US8881831B2 (en) | 2006-11-07 | 2014-11-11 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US9085940B2 (en) | 2006-11-07 | 2015-07-21 | Halliburton Energy Services, Inc. | Offshore universal riser system |
US8281875B2 (en) | 2008-12-19 | 2012-10-09 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US9567843B2 (en) | 2009-07-30 | 2017-02-14 | Halliburton Energy Services, Inc. | Well drilling methods with event detection |
US8397836B2 (en) | 2009-12-15 | 2013-03-19 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US8286730B2 (en) | 2009-12-15 | 2012-10-16 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US9169700B2 (en) | 2010-02-25 | 2015-10-27 | Halliburton Energy Services, Inc. | Pressure control device with remote orientation relative to a rig |
US8820405B2 (en) | 2010-04-27 | 2014-09-02 | Halliburton Energy Services, Inc. | Segregating flowable materials in a well |
US8261826B2 (en) | 2010-04-27 | 2012-09-11 | Halliburton Energy Services, Inc. | Wellbore pressure control with segregated fluid columns |
US8201628B2 (en) | 2010-04-27 | 2012-06-19 | Halliburton Energy Services, Inc. | Wellbore pressure control with segregated fluid columns |
US8833488B2 (en) | 2011-04-08 | 2014-09-16 | Halliburton Energy Services, Inc. | Automatic standpipe pressure control in drilling |
US9080407B2 (en) | 2011-05-09 | 2015-07-14 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US9605507B2 (en) | 2011-09-08 | 2017-03-28 | Halliburton Energy Services, Inc. | High temperature drilling with lower temperature rated tools |
US10233708B2 (en) | 2012-04-10 | 2019-03-19 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US9823373B2 (en) | 2012-11-08 | 2017-11-21 | Halliburton Energy Services, Inc. | Acoustic telemetry with distributed acoustic sensing system |
US10724315B2 (en) | 2015-02-25 | 2020-07-28 | Managed Pressure Operations Pte. Ltd. | Modified pumped riser solution |
Also Published As
Publication number | Publication date |
---|---|
BRPI1008074A2 (en) | 2016-03-15 |
NO20090767L (en) | 2010-08-19 |
US20110297388A1 (en) | 2011-12-08 |
NO329687B1 (en) | 2010-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20110297388A1 (en) | Method and device for pressure regulation of a well | |
AU2018282498B2 (en) | System and methods for controlled mud cap drilling | |
EP2053196A1 (en) | System and method for controlling the pressure in a wellbore | |
NO320829B1 (en) | Underwater wellbore drilling system for reducing bottom hole pressure | |
US20110139506A1 (en) | Pressure and flow control in drilling operations | |
CA2540880C (en) | A method and device for controlling drilling fluid pressure | |
US8844633B2 (en) | Method for maintaining wellbore pressure | |
BR112014026864B1 (en) | system, and method | |
US8851181B2 (en) | Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore | |
US20180245411A1 (en) | Method of operating a drilling system | |
US11891861B2 (en) | Multi-mode pumped riser arrangement and methods | |
US10648315B2 (en) | Automated well pressure control and gas handling system and method | |
NO20190004A1 (en) | Systems and methods for managing fluid pressure in a borehole during drilling operations | |
US11365594B2 (en) | Non-stop circulation system for maintaining bottom hole pressure | |
US20170089156A1 (en) | A system for controlling wellbore pressure during pump shutdowns | |
Agustinus et al. | Managed pressure drilling application to deploy lower completion safely and efficiently in static-underbalanced well | |
Scanlon | Environmentally-Improved Method of Drilling Top-Hole Sections Offshore Brasil Using Dual-Gradient Drilling Techniques for the First Time in Brasil | |
Rasmussen et al. | Managed Pressure Drilling; Techniques and Options for Improving Efficiency, Operability and Well Safety in Subsea TTRD. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10743994 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10743994 Country of ref document: EP Kind code of ref document: A1 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: PI1008074 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: PI1008074 Country of ref document: BR Kind code of ref document: A2 Effective date: 20110802 |