WO1990011455A1 - Coupling - Google Patents
Coupling Download PDFInfo
- Publication number
- WO1990011455A1 WO1990011455A1 PCT/AU1990/000113 AU9000113W WO9011455A1 WO 1990011455 A1 WO1990011455 A1 WO 1990011455A1 AU 9000113 W AU9000113 W AU 9000113W WO 9011455 A1 WO9011455 A1 WO 9011455A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- helical
- coupling means
- members
- male
- female
- Prior art date
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 20
- 238000010168 coupling process Methods 0.000 title claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 28
- 230000000295 complement effect Effects 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013589 supplement Substances 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/043—Threaded with locking means
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B3/00—Key-type connections; Keys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
Definitions
- THIS INVENTION relates to a coupling and in particular a coupling means for fixing a male member to a female member.
- the invention resides in a coupling means for fixing a male member of substantially circular cross- section to a female member of complementary configuration, one of said members being formed with a helical groove to be in opposed relation to a correspondingly configured helical formation on the other member when the members are inter-engaged, a plurality of locking elements of substantially complementary configuration to the profile of the helical groove and helical formation being receivable between the helical formation and the helical groove on engagement of the male and female members.
- the helical formation comprises a helical array of apertures.
- the helical formation is formed as a continuous helical recess terminating short of the end/or ends of the one member.
- the helical formation comprises a set of groove shaped recesses.
- each locking element may be shaped as a ball.
- the locking element may be cubic in shape.
- the locking element may be substantially cylindrical in shape.
- a set screw is receivable in the female member to be engagable with one or more locking elements received between the helical groove and the helical formation and the members are substantially fully engaged to cla pingly engage the locking element between the male and female members.
- Figure 1 is a side elevation of a male member according to the first embodiment
- Figure 2 is a sectional side elevation of a female member of the first embodiment
- Figure 3 is a sectional side elevation of the male and female members when inter-engaged
- Figure 4 is a side elevation of a male member according to the second embodiment.
- Figure 4 is a side elevation of a female member according to the third embodiment.
- Each of the embodiments relates to a means for effecting a coupling between two components which is intended to supplement and/or replace the conventional threaded interconnection which is used between a male and female member of complementary con iguration.
- a threaded interconnection is required for a component which is involved in a transmission of large impact and/or torsional forces a threaded connection can provide the most effective interconnection, however by the nature of its inter-engagement and the high frictional forces which are established between the members, several difficulties can be experienced when it becomes necessary to separate the two components.
- the first embodiment provides a male member 11 and a female member 12 of complementary configuration.
- the female member is formed with a helical groove 13 which has a part circular profile.
- the male member is formed with a helical formation in the form of a helical array of recesses 14.
- Each recess has a part spherical configuration.
- the helical array of recesses is complementary in its pitch to the helical groove 13 provided on the male member.
- Each of the recesses 14 receives a ball 15 having a configuration conforming to the profile of the recess and of the helical groove 13.
- the recesses 14 have a depth of less than the diameter of the balls in order that a portion of the surface of a ball received within a recess will extend beyond the surface of the male member.
- the female member may be associated with a set screw (not shown) which is threadably received in an aperture provided in the wall of the female member which is in alignment with one of the recesses when the male and female members are fully engaged.
- the engagement of the set screw with the ball located in the respective recess produces a clamping engagement of the ball between the male and female members to frictionally lock the members together.
- the helical formation on the male member may take the form of a continuous helical groove shaped recess 114 of corresponding pitch to the helical groove on the female member but of a fixed length and which terminates short of the end of the male member.
- the adjacent end of the helical recess is aligned with the entry to the helical groove provided in the female member and a ball is located therebetween.
- additional balls are inserted into the space between the helical groove and helical recess until the helical recess is fully received in the male member.
- a set screw can be threadably received through an aperture in the wall of the female member to be in alignment with the helical groove and helical recess when the male and female members are fully engaged.
- the set screw is thus engagable with one or more of the balls located between the male and female members to clampingly engage the ball between those members and thus frictionally lock the members together.
- the helical formation takes the form of a series of helically disposed groove shaped recesses 214 which together define a helical formation of complementary configuration to the helical groove in the female member (not shown) .
- the balls as described may be substituted by any suitable regularly shaped element.
- the element may be cylindrical in shape and the configuration of the helical formation be such that the elements are received such that their central axes are substantially radially directed with respect to the male member.
- the helical groove provided in the female member has a substantially square shaped profile to snugly receive the exposed ends of the locking elements.
- the locking elements may be located within the helical formation such that the central axes of the locking elements are substantially tangential. In that instance the profile of the helical formation and the helical groove will conform to the curved configuration of the cylindrical elements. It should be appreciated however, that other shapes (e.g. cubic shapes) of the locking elements may be utilised depending upon the nature of the circumstances.
- each of the embodiments has been described as having the helical formation on the male member and the helical groove on the female member it is also possible for the helical formation to be located on the female member and the helical groove to be located on the male member if the circumstances so require or permit.
- a coupling is provided which can withstand considerable impact and torsional forces but which, due to the relatively small contact area between the male member and female member provided by the locking element, is relatively easily disassembled.
- the embodiment has particular advantage in the drilling industry to provide for the coupling of drilling components to drill strings and the like.
- the embodiment also has application as a replacement for standard threaded connections which are subject to high loads such as impellers on large centrifugal pumps, propellers, or shafts and like components.
Abstract
A coupling means for fixing a male member (11) of substantially circular cross section to a female member (12) of complementary configuration, one of said members is formed with a helical groove (13) to be in opposed relation to a correspondingly configured helical formation (14) on the other member when the members are inter-engaged, a plurality of locking elements (15) of substantially complementary configuration to the profile of the helical groove (13) and helical formation (14) are receivable between the helical formation (14) and the helical groove (13) on engagement of the male and female members (11, 13).
Description
COUPLING
THIS INVENTION relates to a coupling and in particular a coupling means for fixing a male member to a female member.
In one form the invention resides in a coupling means for fixing a male member of substantially circular cross- section to a female member of complementary configuration, one of said members being formed with a helical groove to be in opposed relation to a correspondingly configured helical formation on the other member when the members are inter-engaged, a plurality of locking elements of substantially complementary configuration to the profile of the helical groove and helical formation being receivable between the helical formation and the helical groove on engagement of the male and female members.
According to one embodiment the helical formation comprises a helical array of apertures.
According to another embodiment the helical formation is formed as a continuous helical recess terminating short of the end/or ends of the one member.
According to a further embodiment the helical formation comprises a set of groove shaped recesses.
In each of the embodiments each locking element may be shaped as a ball.
In each of the embodiments the locking element may be cubic in shape.
In each of the embodiments the locking element may be substantially cylindrical in shape.
SUBSTITUTE SHEET
According to a preferred feature a set screw is receivable in the female member to be engagable with one or more locking elements received between the helical groove and the helical formation and the members are substantially fully engaged to cla pingly engage the locking element between the male and female members.
The invention will be more fully understood in the light of the following description of several specific embodiments.
The description is made with reference to the accompanying drawings of which;
Figure 1 is a side elevation of a male member according to the first embodiment;
Figure 2 is a sectional side elevation of a female member of the first embodiment;
Figure 3 is a sectional side elevation of the male and female members when inter-engaged;
Figure 4 is a side elevation of a male member according to the second embodiment; and
Figure 4 is a side elevation of a female member according to the third embodiment.
Each of the embodiments relates to a means for effecting a coupling between two components which is intended to supplement and/or replace the conventional threaded interconnection which is used between a male and female member of complementary con iguration. In instances where a threaded interconnection is required for a component
which is involved in a transmission of large impact and/or torsional forces a threaded connection can provide the most effective interconnection, however by the nature of its inter-engagement and the high frictional forces which are established between the members, several difficulties can be experienced when it becomes necessary to separate the two components.
The first embodiment provides a male member 11 and a female member 12 of complementary configuration. The female member is formed with a helical groove 13 which has a part circular profile. The male member is formed with a helical formation in the form of a helical array of recesses 14. Each recess has a part spherical configuration. The helical array of recesses is complementary in its pitch to the helical groove 13 provided on the male member. Each of the recesses 14 receives a ball 15 having a configuration conforming to the profile of the recess and of the helical groove 13. The recesses 14 have a depth of less than the diameter of the balls in order that a portion of the surface of a ball received within a recess will extend beyond the surface of the male member. On engagement of the male member- 11 with the female member 12, the first recess to enter the female member is aligned with the entry to the helical groove 13 and a ball 15 is engaged therewith in order to enter the groove. With further engagement of the male member relative rotation is produced between the male and female member in order that the first ball 15 travels along the helical groove until the next recess is located at the entry of the helical groove 13 at which time a second ball 15 is located in the next recess. This action is repeated until the engagement between the male and female members is completed.
— A . —
If desired the female member may be associated with a set screw (not shown) which is threadably received in an aperture provided in the wall of the female member which is in alignment with one of the recesses when the male and female members are fully engaged. The engagement of the set screw with the ball located in the respective recess produces a clamping engagement of the ball between the male and female members to frictionally lock the members together.
In the case of the second embodiment as shown at Figure 4 the helical formation on the male member may take the form of a continuous helical groove shaped recess 114 of corresponding pitch to the helical groove on the female member but of a fixed length and which terminates short of the end of the male member. On engagement of the male member 111 with the respective female member (not shown) the adjacent end of the helical recess is aligned with the entry to the helical groove provided in the female member and a ball is located therebetween. On further engagement of the male member with the female member and on relative rotation between the male member and female member additional balls are inserted into the space between the helical groove and helical recess until the helical recess is fully received in the male member.
As in the case of the first embodiment, if desired a set screw can be threadably received through an aperture in the wall of the female member to be in alignment with the helical groove and helical recess when the male and female members are fully engaged. The set screw is thus engagable with one or more of the balls located between the male and female members to clampingly engage the ball between those members and thus frictionally lock the members together.
In the case of the third embodiment as shown at Figure 5 the helical formation takes the form of a series of helically disposed groove shaped recesses 214 which together define a helical formation of complementary configuration to the helical groove in the female member (not shown) . On engagement of the male member 211 with a respective female member and as each recess 215 is brought into engagement with the entry of the helical groove provided in the female member an appropriate number of balls are located in the space therebetween on relative rotation between the male and female member such that the spaces so formed are substantially filled with such balls. This process is completed until the male members and the female members are fully inter-engaged. As in the case in the previous embodiment a set screw may be provided in the female member to clampingly engage one or more of the balls accommodated between the male and female members.
It should be appreciated that in the case of each of the above embodiments that if desired the balls as described may be substituted by any suitable regularly shaped element. For example the element may be cylindrical in shape and the configuration of the helical formation be such that the elements are received such that their central axes are substantially radially directed with respect to the male member. As a result the helical groove provided in the female member has a substantially square shaped profile to snugly receive the exposed ends of the locking elements. Alternatively, in the case of a locking element having a substantially cylindrical configuration the locking elements may be located within the helical formation such that the central axes of the locking elements are substantially tangential. In that instance the profile of the helical formation and the
helical groove will conform to the curved configuration of the cylindrical elements. It should be appreciated however, that other shapes (e.g. cubic shapes) of the locking elements may be utilised depending upon the nature of the circumstances.
In addition, while each of the embodiments has been described as having the helical formation on the male member and the helical groove on the female member it is also possible for the helical formation to be located on the female member and the helical groove to be located on the male member if the circumstances so require or permit.
As a result of the embodiment a coupling is provided which can withstand considerable impact and torsional forces but which, due to the relatively small contact area between the male member and female member provided by the locking element, is relatively easily disassembled. The embodiment has particular advantage in the drilling industry to provide for the coupling of drilling components to drill strings and the like. The embodiment also has application as a replacement for standard threaded connections which are subject to high loads such as impellers on large centrifugal pumps, propellers, or shafts and like components.
It should be appreciated that the scope of the present invention need not be limited to the particular scope of the embodiments described above.
Claims
1. A coupling means for fixing a male member of substantially circular cross-section to a female member of complementary configuration, one of said members being formed with a helical groove to be in opposed relation to a correspondingly configured helical formation on the other member when the members are inter-engaged, a plurality of locking elements of substantially complementary configuration to the profile of the helical groove and helical formation being receivable between the helical formation and the helical groove on engagement of the male and female members.
2. A coupling means as claimed in claim 1 wherein the helical formation comprises a helical array of apertures.
3. A coupling means as claimed at claim 1 wherein the helical formation is formed as a continuous helical recess terminating short of the end/or ends of the one member.
4. A coupling means as claimed at claim 1 wherein the helical formation comprises a set of groove shaped recesses.
5. A coupling means as claimed at claim 2, 3 or 4 wherein each locking element is shaped as a ball.
6. A coupling means as claimed at any one of claims 2, 3 or 4 wherein the locking element is cubic in shape.
7. A coupling means as claimed at any one of claims 2, 3 or 4 wherein the locking element is substantially cylindrical in shape.
8. A coupling means as claimed at claim 7 wherein the locking elements are receivable in the helical formation such that their central axes are directed radially.
9. A coupling means as claimed at claim 7 wherein the locking elements are receivable in the helical formation such that their central axes are substantially tangential.
10. A coupling means as claimed at any one of the preceding claims wherein a set screw is receivable in the female member to be engagable with one or more locking elements received between the helical groove and the helical formation and the members are substantially fully engaged to clampingly engage the locking element between the male and female members.
11. A coupling means substantially as herein described.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPJ339489 | 1989-03-28 | ||
AUPJ3394 | 1989-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990011455A1 true WO1990011455A1 (en) | 1990-10-04 |
Family
ID=3773808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1990/000113 WO1990011455A1 (en) | 1989-03-28 | 1990-03-20 | Coupling |
Country Status (2)
Country | Link |
---|---|
WO (1) | WO1990011455A1 (en) |
ZA (1) | ZA902348B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU696419B2 (en) * | 1994-07-13 | 1998-09-10 | Expertest Pty. Ltd. | Quick connect coupling |
WO2003036017A1 (en) * | 2001-10-22 | 2003-05-01 | Weatherford/Lamb, Inc. | Locking arrangement for a threaded connector |
GB2396676A (en) * | 2002-12-06 | 2004-06-30 | Weatherford Lamb | Wire lock expandable connection |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB264077A (en) * | 1926-07-28 | 1927-01-13 | James Cuthill | Improvements in joints for connecting drill or fishing tools to drill rods and the like |
AU2487430A (en) * | 1930-01-29 | 1931-01-22 | Scaffolding (great Britain ) Limited | Improvements in or connected with means for connecting tubes together |
US2150875A (en) * | 1936-07-18 | 1939-03-14 | Aircraft Screw Prod Co | Method of connecting light metal alloy parts |
GB1275032A (en) * | 1970-03-31 | 1972-05-24 | Heath & Sherwood Drilling Ltd | Drill pipe |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2487430B (en) * | 1930-01-29 | 1931-01-22 | Scaffolding Great Britain Ltd | Improvements in or connected with means for connecting tubes together |
-
1990
- 1990-03-20 WO PCT/AU1990/000113 patent/WO1990011455A1/en unknown
- 1990-03-27 ZA ZA902348A patent/ZA902348B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB264077A (en) * | 1926-07-28 | 1927-01-13 | James Cuthill | Improvements in joints for connecting drill or fishing tools to drill rods and the like |
AU2487430A (en) * | 1930-01-29 | 1931-01-22 | Scaffolding (great Britain ) Limited | Improvements in or connected with means for connecting tubes together |
US2150875A (en) * | 1936-07-18 | 1939-03-14 | Aircraft Screw Prod Co | Method of connecting light metal alloy parts |
AU221954A (en) * | 1954-08-06 | 1955-11-13 | Rip-Bits Limited | Improvements in and relating to rock drills and detachable bits therefor |
GB1275032A (en) * | 1970-03-31 | 1972-05-24 | Heath & Sherwood Drilling Ltd | Drill pipe |
Non-Patent Citations (1)
Title |
---|
"Illustrated Dictionary of Mechanical Engineering", published 1984, by MARTINUS NIJHOFF, see page 56, figures 4.117 and 4.118. * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU696419B2 (en) * | 1994-07-13 | 1998-09-10 | Expertest Pty. Ltd. | Quick connect coupling |
WO2003036017A1 (en) * | 2001-10-22 | 2003-05-01 | Weatherford/Lamb, Inc. | Locking arrangement for a threaded connector |
GB2392965A (en) * | 2001-10-22 | 2004-03-17 | Weatherford Lamb | Locking arrangement for a threaded connector |
GB2392965B (en) * | 2001-10-22 | 2005-03-23 | Weatherford Lamb | Locking arrangement for a threaded connector |
US6908121B2 (en) | 2001-10-22 | 2005-06-21 | Weatherford/Lamb, Inc. | Locking arrangement for a threaded connector |
AU2002336186B2 (en) * | 2001-10-22 | 2008-01-24 | Weatherford Technology Holdings, Llc | Locking arrangement for a threaded connector |
AU2002336186B8 (en) * | 2001-10-22 | 2008-06-19 | Weatherford Technology Holdings, Llc | Locking arrangement for a threaded connector |
GB2396676A (en) * | 2002-12-06 | 2004-06-30 | Weatherford Lamb | Wire lock expandable connection |
GB2396676B (en) * | 2002-12-06 | 2005-11-16 | Weatherford Lamb | Wire lock expandable connection |
US6981547B2 (en) | 2002-12-06 | 2006-01-03 | Weatherford/Lamb, Inc. | Wire lock expandable connection |
Also Published As
Publication number | Publication date |
---|---|
ZA902348B (en) | 1991-03-27 |
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