GB2108180A - Hydraulic set well packer - Google Patents
Hydraulic set well packer Download PDFInfo
- Publication number
- GB2108180A GB2108180A GB08230908A GB8230908A GB2108180A GB 2108180 A GB2108180 A GB 2108180A GB 08230908 A GB08230908 A GB 08230908A GB 8230908 A GB8230908 A GB 8230908A GB 2108180 A GB2108180 A GB 2108180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- packer
- mandrel
- slip
- segments
- sub
- 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.)
- Withdrawn
Links
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical group C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 claims description 10
- 241000282472 Canis lupus familiaris Species 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A hydraulic set, straight pull shear release well packer 10 which will transmit tubing torque before setting and after release has first and second pistons one of which 26 sets the slips 18 and one of which 30 sets the sealing element 20 without tubing movement. Preferably, the slips 18 include a plurality of sets of opposing and overlapping slip segments 58 and cone segments 60 for reducing setting travel in which one plurality of sets has the slip segments 58 above the cone segments 60 while alternative sets have the slip segments below the cone segments with the lower segments secured to the mandrel 14 and the upper segments actuated by a piston 26. An adapter may be provided to convert the packer to a permanent retrievable packer that will withstand both tension and compression without releasing. In addition, an expansion joint may be provided connected to the packer by a hydraulic release mechanism. <IMAGE>
Description
SPECIFICATION
Hydraulic set well packer
This invention relates to a hydraulic set well packer.
A hydraulically actuated packer which is released by an upward pull is known from
US-PS 4,141,413.
The present invention is directed to an improved low cost utility packer which is hydraulically set with a straight pull shear release.
The present invention provides a hydraulic set well packer, comprising a tubular mandrel having connecting means at the lower end, expandable and contractable slip means positioned about the lower end of the mandrel, expandable and contractable packer seal means positioned about the mandrel above the slip means, a hydraulic cylinder positioned about the mandrel between the slip means and the packer seal means, a hydraulic port in the mandrel communicating with the interior of the cylinder, first and second pistons positioned in the cylinder on opposite sides of the port, said first piston engaging the slip means and the second piston engaging the packer seal means whereby actuation of the pistons away from each other by fluid flow through the port expands the slip means and the packer seal means, one of said pistons being connected to the cylinder and one way holding means between said cylinder and the other piston for holding the slip means and packer means in the expanded position; an upper sub having connecting means and telescopically connected to the upper end of the mandrel, key means between the sub and the mandrel for transmitting rotation between the sub and the mandrel, stop means positioned about the mandrel for engaging the packer seal means, and release shear means connected between the stop means and the sub for releasing the packer by an upward pull on the sub.
The well packer of the invention will transmit tubing torque before setting and after release and any torque applied before setting will not affect the setting or release mechanism. The setting mechanism utilizes two pistons, one to set the slips and one to set the sealing element, all of which can be accomplished without moving the tubing.
An improved slip assembly which reduces the setting travel and reduces the length of the packer may comprise a plurality of sets of opposing and overlapping slip segments and cone segments in which one plurality of sets has the slip segments above the cone segments while alternate sets have the slip segments below the cone segments. The lower slip segments and cone segments are secured to the mandrel while the upper slip segments and cone segments engage the first piston whereby the slip means may be actuated with a reduced travel thereby reducing the required length of the packer.
One way holding means such as ratchet means may be positioned between the second piston and the mandrel for preventing setting of the slips after release of the packer.
One way ratchet means may be positioned between the upper sub and the mandrel for allowing upward movement of the sub relative to the mandrel but transmitting downward movement to the mandrel after releasing the shear means for assisting in releasing the slips if required.
An adapter may be provided to convert the packer to a permanent retrievable packet that will withstand both tension and compression without affecting the release mechanism. The adapter may be connected to the stop housing having connecting means for connection to a conduit whereby the packer may withstand both tension and compression without releasing.
In addition an internal expansion joint may be utilized connected to the packer by a nonshear hydraulic release mechanism. The expansion joint extends through the packer and has a locking recess. A hydraulically actuated lockdown is connected to the mandrel surrounding the expansion joint. The lockdown includes expansible and retractable dogs in which the dogs are initially expanded into the expansion joint recess for locking the joint to the packer, but reieasable upon actuation by hydraulic fluid.
The invention will now be further described with reference to the accompanying drawings, in which: Figures 1A and 1B together constitute a quarter-sectional elevation of a well packer of the present invention, shown in the running position,
Figures 2A and 2B together constitute a fragmentary elevational view, in cross section, of the well packer in the set position,
Figures 3A and 3B together constitute a fragmentary elevational view, in cross section, of the well packer in the released position,
Figure 4 is a fragmentary elevational view, partly in cross section, illustrating an adapter for connection to the well packer for converting the packer to a permanent retrievable packer,
Figure 5 is an elevational view, partly in cross section, of one type of a stinger for use with the adapter shown in Fig. 4,
Figure 6 is a fragmentary elevational view, in cross section, of another type of stinger which may be used in the adpater of Fig. 4, and
Figures 7A, 7B, 7C, 7D and 7E are continuations of each other of an elevational view, partly in cross section, of a well placker of the present invention utilized with an adapter and an expansion joint as a permanent retrievable packer with a connected internal expansion joint.
Referring now to Figs. 1A, 1 B, 2A, 2B, 3A and 3B of the drawings, the well packer 10 for use in setting in a casing 1 2 of a well bore includes a tubular mandrel 14 having connecting means such as threads 1 6 at its lower end. Expandable and contractable slip means 18 are positioned about the lower end of the mandrel 14. Expandable and contractable packer seal means are positioned about the mandrel 14 above the slip means 1 8. A hydraulic cylinder 22 is positioned about the mandrel 14 between the slip means 1 8 and the packer seal means 22. A hydraulic fluid port 24 is provided in the mandrel 14 communicating with the interior of the cylinder 22.
A first piston 26 formed by seals 28 is positioned in the cylinder 22 on one side of the port 24 and engages the slip means 1 8. A second piston 30 formed by seals 32 is positioned on the opposite side of the port 24 and engages the packer seal means 20. Passage of suitable hydraulic fluid through the port 24 moves the pistons 26 and 30 away from each other, as best seen in Fig. 2B, for expanding the slip means 1 8 and the packer seal means 20 into engagement with the casing 1 2. One of the pistons, such as piston 26 is connected to the cylinder 22 by threads 34 and a one way holding means, such as a spring loaded ratchet 36 (Fig. 1A) is provided between the cylinder 22 and the other piston, such as 30, for holding the slip means 1 8 and packer means 20 in the set position.
Preferably, the slip means 1 8 and the packer means 20 are initially held in the running or retracted position by a shear pin 38 which is sheared upon actuation of the pistons 26 and 30.
Now referring to Figs. 1A, 2A and 3A, an upper sub 40 is provided having connecting means such as threads 42 and is telescopically connected to the upper end of the mandral 14. A key 42 and spline 44 are provided between the sub 40 and the mandral 14 for transmitting tubing torque through the packer 10 before setting and after release. A stop housing 46 is positioned about the mandrel 14 for engaging the upper end of the packer seal means 20 and also overlaps and surrounds the sub 40. One or more release means such as shear pins 48 are provided for releasing the packer 10 by an upward pull on the sub 40 after the packer is set.
Referring now to Fig. 1 B, a one way holding means such as a ratchet 50 is positioned between the second piston 30 and the mandrel 14 for preventing setting of the slip means 1 8 after release of the packer as will be more fully described hereinafter. Referring to Fig. 1A, a one way holding means such as ratchet means 52 is provided having a wedge surface 54 which coacts between a wedge surface 56 on the upper sub 40 for transmitting downward movement to the mandrel 14 after release of the shear means 48 for assisting in releasing the slip means 1 8 if required.
The ratchet 52 is initially held in place by the wedge surface 56 on the upper sub 40 for holding the stop housing 46 while the packer 10 is set.
Referring now to Figs. 1 B, 2B and 3B, the slip means 1 8 preferably includes a plurality of sets of oppositng and overlapping slip segments and cone segments. One plurality of sets include slip segments 58 overlapping and positioned above their coacting cone segments 60 while alternate sets have the slip segments 58 overlapping and below their coacting cone segments 60. The lower slip segments 58 and cone segments 60 are secured to the mandrel 14 through an adapter 62 and the upper slip segments 58 and cone segments 60 engage the first piston 26. By connecting one end of a slip-cone set to the mandrel and actuating the second end of the set the setting travel of the slip means 1 8 is reduced to half as compared to the case where the slip mechanism moves against a movable packer.Preferably, the slip means 1 8 are bidirectional in their load holding capacbility and have been placed below the packer seal means 20 to eliminate fouling due to well debris.
The seal means 20, as best seen in Figs.
1 A, 2A and 3A, may be any suitable type seal but preferably includes three separate sealing elements 64, 66 and 68 separated by spacer rings 70 in which sealing elements 64 and 68 are of a harder element to act as backup to the softer inner ring 66 for preventing failure by extrusion.
The packer 10 is seen in Figs. 1 A and 1 B in the running in position in which it is connected to a running string (not shown) and lowered into the casing 1 2 to the position in which it is to be set. Hydraulic fluid is transmitted through the interior 11 of packer 10 and through the port 24 to actuate the pistons 26 and 30. Actuation of the pistons 28 and 30 will shear pin 38 and the movement of the pistons 28 and 30 away from each other will set the slip means 18 and the packer seal 28 to the set position as seen in
Figs. 2A and 2B. It is noted that the setting accurs without movement of the mandrel 14 and the tubing string thereby enabling multiple packers to be run into a well. One way ratchet 36 holds the cylinder 22 relative to the piston 30 for holding the slip means 18 and packer means 20 in the set position.
When it is desired to release the packer 10, an upward pull is taken on the upper sub 40, as seen in Figs. 3A and 3B, which shears the release pin 48 and a shoulder 72 on the sub 40 engages a coacting shoulder 74 on the stop housing 46 to move the stop housing 46 upwardly allowing the seal means 20 to re tract which allows the piston 30 to move further upwardly allowing the slip means 18 to retract. Also, as the wedge 56 on the upper sub 40 moves upwardly, the ratchet 52 is released and is carried upwardly by the stop housing 40 relative to the mandrel 14.If, for some reason, the slip means 18 have not suitably retracted a downward movement may be taken on the upper sub 40 again reengaging the wedge 56 against the now upwardly positioned ratchet 52 to drive the mandrel 14 downwardly which carries the lower slip and cone adapter 62 downwardly to more positively release the slip means 18.
It is also noted that the one way ratchet 50 prevents the second piston 30 from moving downwardly relative to the mandrel 14 after releasing the packer for preventing the slip means 18 from accidentally expanding. After release of the packer 10 torque may be applied to the upper sub 40, the key 42 and spline 44 through the mandrel 14.
The above described structure and operation of the packer 10 provides a hydraulic set packer which will release on an upward pull of the tubing string. However, in some cases it may be desirable to provide a packer that will withstand both tension and compression in the tubing string without affecting the release mechanism. Referring now to Fig. 4 the packer 1 Oa is identical to the packer shown in Figs. 1 and 2, and an adapter 80 has been provided which is connected to the stop housing 46 such as by suitable threads 82. The adapter 80 also includes suitable connecting means such as threads 84 if desired, and the connecting means 42a on the upper sub 40 may be changed to different type of threads. The packer 1 Oa is set identically to the setting of the packer 10.Release of the packer 1 Oa is accomplished by a tool engaging the thread 42a for moving the upper sub 40 upwardly relative to the adapter 80 for shearing the shear pins 48 for releasing the packer 10a. However, in use as a permanent packer only threads 84 are engaged by the tubing string and any tension or compression in the tubing string and adapter 80 will not shear the pins 48. That is, upward pull on the adapter 80 will not cause any relative movement between the adapter 80 and the upper sub 40 as an upward pull on the stop housing 46 will be transmitted to the mandrel 14 through the ratchet 52 which is locked in place by the wedge surface 56 on the upper sub 40. Any compression in the tubing string and adapter 80 will be held by the expanded slip means 1 8 as in the case of the packer 10.
While any type of tubing connection to the adapter 80 may be utilized, the use of conventional type stinger options for connecting the tubing string to the packer 1 ova is contemplated. Referring now to Fig. 5, a stinger 86 is shown having a connecting means such as threads 88 for connection to a tubing string and a threaded connection 90 for mating with the threads 84 in the adapter 80. The threads 84 and 90 may be either a straight pickup release threaded collet type, or a right-hand release threaded collet type. The stinger 86 includes a seal 92 for sealing against the interior of the adpater 80. Another type of stinger is shown in Fig. 6 as stinger 94 having a seal 96 and is a straight pickup release type stinger.
The packer 10 of Figs. 1 and 2 may also include options converting the packer 10 to a permanent retrievable packer that includes an internal expansion joint which is connected to the packer by non-shearable means such as a hydraulic actuated lockdown. Such a packer is shown in Figs. 7A, 7B, 7C, 7D, and 7E. The packer 1 Ob is substantially identical to the packers 10 and 1 Oa and includes an adapter 80b connected to the stop housing 46b for connection to a tubing string whereby the packer 1 Ob will withstand both tension and compression without affecting the release shear pins 48b to convert the packer 1 Ob to a permanent retrievable packer. A seal bore extension 100b with a retrieving sub and safety joint half is provided connected to the adapter 80b.As internal seal assembly expansion joint 100 extends through the packer lOb and seals against the interior of the bore of the packer 1 Ob.
It is desirable to connect the expansion joint 100 to the packer 1 Ob whereby both the seal assembly 100 and packer lOb may be simultaneously run into the well bore, but it is undesirable to provide a shearable connection between the seal assembly 100 and the packer 1 Ob as it may become inadvertently sheared.
Referring now to Fig. 7E, a hydraulic lockdown 102 is provided which includes coacting connecting means such as threads 104 for attachment to the threads 1 6b of the mandrel 1 4b of the packer 1 Ob and further includes connecting means such as threads 106 for connection to another conduit. The lockdown 102 includes a plurality of locking dogs 108 shown in the expanded position for engaging a recess 110 in the expansion joint 100 for initially locking the expansion joint 100 to the packer 1 Ob. A piston 112 is provided in the lockdown 102 formed by seals 114 and includes a wedge surface 11 6 which coacts with a wedge surface 11 8 on the dogs 108.A shear pin 1 20 initially holds the piston 11 2 in position against the dogs 118 for connecting the assembly 100 to the packer 10b. A port 122 is provided in the assembly 100 for transmitting hydraulic fluid against the piston 11 2 for shearing the pin 1 20 and releasing the dogs 108 whereby the assembly 100 may be disconnected from the packer lOb.
In use, the packer 1 Ob of Fig. 7 is con nected to the expansible joint 100 by the dogs 108 of the hydraulic lockdown 102 and expansible joint 100 and packer lOb are simultaneously run into the casing 1 2. The packer 1 Ob is set by hydraulic pressure through the port 24b which moves the pistons 26b and 30b to set the slip means 1 8b and the packer seal means 20b. Further pressure through the port 1 22 will actuate the piston 11 2 of the lock down 102 to release the expansion joint 100 from the packer 1 Ob.
The expansion joint 100 is fully retrievable without pulling the packer lOb and the packer 1 0b is of the permanent retrievable type and is released by a tool which creates movement of the upper sub 40b relative to the adapter 80b. Otherwise, tension or compression placed upon the adapter 80b or extension 1 00b will not affect the releasing of the packer lOb.
Claims (9)
1. A hydraulic set well packer, comprising a tubular mandrel having connecting means at the lower end, expandable and contractable slip means positioned about the lower end of the mandrel, expandable and contractable packer seal means positioned about the mandrel above the slip means, a hydraulic cylinder positioned about the mandrel between the slip means and the packer seal means, a hydraulic port in the mandrel communicating with the interior of the cylinder, first and second pistons positioned in the cylinder on opposite sides of the port, said first piston engaging the slip means and the second piston engaging the packer seal means whereby actuation of the pistons away from each other by fluid flow through the port expands the slip means and the packer seal means, one of said pistons being connected to the cylinder and one way holding means between said cylinder and the other piston for holding the slip means and packer means in the expanded position; an upper sub having connecting means and telescopically connected to the upper end of the mandrel, key means between the sub and the mandrel for transmitting rotation between the sub and the mandrel, stop means positioned about the mandrel, for engaging the packer seal means, and release shear means connected between the stop means and the sub for releasing the packer by an upward pull on the sub.
2. A well packer according to Claim 1 wherein the slip means includes a plurality of opposing and overlapping slip segments and cone segments, one of which is secured to the mandrel and the other of which engages the first piston for reducing the travel required for setting the slip means.
3. A well packer according to Claim 1 wherein the slip means includes a plurality of sets of opposing and overlapping slip segments and cone segments, one plurality of sets having the slip segments above the cone segments while alternate sets having the slip segments below the cone segments, and said lower slip segments and cone segments being secured to the mandrel and the upper slip segments and cone segments engaging the first piston.
4. A well packer according to Claim 1, including one way holding means positioned between the second piston and the mandrel for preventing setting of the slips after release of the packer.
5. A well packer according to Claim 1, including one-way ratchet means positioned between the upper sub and mandrel for allowing upward movement of the sub relative to the mandrel but transmitting downward movement of the mandrel after releasing the shear means for assisting in releasing the slip means.
6. A well packer according to Claim 1 wherein the sub initially abuts the stop means for holding the stop means as the packer is set.
7. A well packer according to Claim 1, including an adapter connected to stop means having connecting means for connection to a conduit whereby the packer may withstand both tension and compression without releasing.
8. A well packer according to Claim 7, including an expansion joint extending through said packer and having a locking recess, and a hydraulic actuated lock down connected to the mandrel and surrounding the expansion joint, said lock down including expansible and retractable dogs, said dogs initially expandable in the expansion joint recess for locking the joint to the packer but releasable on actuation.
9. A hydraulic set well packer substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31624881A | 1981-10-29 | 1981-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2108180A true GB2108180A (en) | 1983-05-11 |
Family
ID=23228217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08230908A Withdrawn GB2108180A (en) | 1981-10-29 | 1982-10-28 | Hydraulic set well packer |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2515724A1 (en) |
| GB (1) | GB2108180A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216527A3 (en) * | 1985-08-27 | 1988-07-27 | Halliburton Company | Methods and apparatus for well completion operations |
| GB2241722A (en) * | 1990-03-09 | 1991-09-11 | Otis Eng Co | Single bore packer with dual flow conversion for gas lift completion |
| US5113939A (en) * | 1990-03-09 | 1992-05-19 | Otis Engineering Corporation | Single bore packer with dual flow conversion for gas lift completion |
| CN106761541A (en) * | 2017-03-28 | 2017-05-31 | 中国石油大学(北京) | A kind of Hydraulic Anchorage sealing device |
| CN107130936A (en) * | 2017-06-14 | 2017-09-05 | 湖南唯科拓石油科技服务有限公司 | A kind of multichannel Oil/gas Well production packer |
| CN113338841A (en) * | 2021-06-29 | 2021-09-03 | 郭洪霞 | Mechanical packer |
| CN115680531A (en) * | 2021-07-30 | 2023-02-03 | 中国石油天然气股份有限公司 | Anti-seize bi-directional anchor and method of use thereof |
| CN116066011A (en) * | 2023-03-20 | 2023-05-05 | 四川圣诺油气工程技术服务有限公司 | Oil pipe plug and use method thereof |
| CN116607894A (en) * | 2023-05-24 | 2023-08-18 | 中煤科工集团重庆研究院有限公司 | A full-circle clamping hydraulic power head |
| US20250052121A1 (en) * | 2023-08-11 | 2025-02-13 | Larry Bunney | Tubing anchor including slips actuated by segmented cone sections |
-
1982
- 1982-10-27 FR FR8217995A patent/FR2515724A1/en not_active Withdrawn
- 1982-10-28 GB GB08230908A patent/GB2108180A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216527A3 (en) * | 1985-08-27 | 1988-07-27 | Halliburton Company | Methods and apparatus for well completion operations |
| GB2241722A (en) * | 1990-03-09 | 1991-09-11 | Otis Eng Co | Single bore packer with dual flow conversion for gas lift completion |
| US5113939A (en) * | 1990-03-09 | 1992-05-19 | Otis Engineering Corporation | Single bore packer with dual flow conversion for gas lift completion |
| GB2241722B (en) * | 1990-03-09 | 1994-06-01 | Otis Eng Co | Single bore packer with dual flow conversion for gas lift completion |
| CN106761541B (en) * | 2017-03-28 | 2023-01-24 | 中国石油大学(北京) | A hydraulic anchor sealing device |
| CN106761541A (en) * | 2017-03-28 | 2017-05-31 | 中国石油大学(北京) | A kind of Hydraulic Anchorage sealing device |
| CN107130936A (en) * | 2017-06-14 | 2017-09-05 | 湖南唯科拓石油科技服务有限公司 | A kind of multichannel Oil/gas Well production packer |
| CN113338841A (en) * | 2021-06-29 | 2021-09-03 | 郭洪霞 | Mechanical packer |
| CN113338841B (en) * | 2021-06-29 | 2022-07-22 | 大庆市天顺和泰石油科技有限公司 | Mechanical packer |
| CN115680531A (en) * | 2021-07-30 | 2023-02-03 | 中国石油天然气股份有限公司 | Anti-seize bi-directional anchor and method of use thereof |
| CN116066011A (en) * | 2023-03-20 | 2023-05-05 | 四川圣诺油气工程技术服务有限公司 | Oil pipe plug and use method thereof |
| CN116607894A (en) * | 2023-05-24 | 2023-08-18 | 中煤科工集团重庆研究院有限公司 | A full-circle clamping hydraulic power head |
| US20250052121A1 (en) * | 2023-08-11 | 2025-02-13 | Larry Bunney | Tubing anchor including slips actuated by segmented cone sections |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2515724A1 (en) | 1983-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |