CN112302630A - Pressure measuring device, pipe string and fishing device - Google Patents
Pressure measuring device, pipe string and fishing device Download PDFInfo
- Publication number
- CN112302630A CN112302630A CN201910687837.0A CN201910687837A CN112302630A CN 112302630 A CN112302630 A CN 112302630A CN 201910687837 A CN201910687837 A CN 201910687837A CN 112302630 A CN112302630 A CN 112302630A
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- measuring device
- fishing
- clamping
- pressure measuring
- pressure
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- 210000000078 claw Anatomy 0.000 claims description 20
- 238000009530 blood pressure measurement Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 16
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
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)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Marine Sciences & Fisheries (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a pressure measuring device, a pipe string and a fishing device, wherein the pressure measuring device comprises a feeding mandrel, a first clamping hanging piece sleeved on the outer wall of the lower end of the feeding mandrel and a pressure gauge arranged at the lower end of the first clamping hanging piece, the feeding mandrel is selectively connected with the first clamping hanging piece, the pressure measuring device is in one-to-one correspondence with a second clamping hanging piece put into a shaft in advance through the first clamping hanging piece, the accurate positioning can be realized, the function is reliable, a plurality of second clamping hanging pieces can be put into a planned well depth in advance, and one or more pressure measuring devices are put into the shaft to the most appropriate well depth for measuring pressure in the later period according to the production state of a gas well.
Description
Technical Field
The invention relates to the technical field of downhole tools of natural gas wells, in particular to a pressure measuring device, a pipe string and a fishing device.
Background
The underground pressure of the gas well is the key point of a dynamic monitoring project of gas well production as a key parameter for people to know the productivity characteristics of the gas well and master the dynamic change of the gas reservoir. The method has the advantages that the bottom hole pressure data and the change rule of the gas well can be accurately mastered, and the method has important significance for making a production system of the gas well and making a gas reservoir development decision. Therefore, it is necessary for field development units to perform this work even though downhole pressure monitoring does not provide immediate economic benefits.
Many methods are used for underground pressure monitoring, and even then, various oil and gas field units at home and abroad still face many problems when underground pressure monitoring is carried out. For example, the risk of steel wire breakage often appears in the mode of adopting cable suspension electronic pressure gauge to measure pressure. For another example, the manner of suspending the electronic pressure downhole is limited by the operation of the steel wire, and the pressure of the horizontal section cannot be measured.
Aiming at the defects of the prior art, the invention provides a pressure measuring device in order to meet different pressure measuring modes and accurately master the pressure of a gas well and the change rule thereof.
Disclosure of Invention
The invention provides a pressure measuring device, a pipe string and a fishing device, aiming at part or all of the technical problems in the prior art. The pressure measuring device has the advantages of simple structure, reliable function and simple and convenient operation.
According to a first aspect of the present invention, there is provided a pressure measuring device comprising:
the feeding and releasing core shaft is arranged on the upper portion of the feeding and releasing core shaft,
a first clamping and hanging piece sleeved on the outer wall of the lower end of the feeding core shaft,
a pressure gauge arranged at the lower end of the first clamping hanging piece,
wherein, send and put dabber and the first card pendant selective connection.
In one embodiment, the first clip hanging piece comprises a first clip hanging piece body, circumferentially spaced elastic claws extending upwards from the first clip hanging piece body in the axial direction, and first clip hanging parts protruding from the outer peripheral walls of the elastic claws, wherein the first clip hanging piece body is selectively connected with the feeding mandrel, and the elastic claws extend upwards to be in clearance sleeve joint with the feeding mandrel.
In one embodiment, the feeding mandrel is connected to the first catch member by a shear pin.
In one embodiment, a protective cover for protecting the pressure gauge is arranged on the outer side of the pressure gauge, and the protective cover is fixedly connected with the first clamping hanging piece.
In one embodiment, a ratchet seat is embedded on the inner wall of the first fastener body.
In one embodiment, a first ramp toward the upper end is provided between the upper end face and the outer side face of the resilient fingers.
According to a second aspect of the present invention, there is provided a pipe string comprising:
a second clip hanging piece is arranged on the second side of the frame,
the pressure measuring device is arranged on the base plate,
and in the process of descending the pressure measuring device, the first clamping and hanging piece is matched with the corresponding second clamping and hanging piece which is descended into the shaft in advance.
In one embodiment, the second card hanging piece is cylindrical, and a second clamping hanging part which can be matched with the first clamping hanging part of the first card hanging piece is concavely arranged on the inner wall of the second card hanging piece.
According to a third aspect of the invention, there is provided a fishing device comprising:
the fishing head is arranged at the tail end of the fishing rod,
the fishing mandrel is arranged at the lower end of the fishing head and extends downwards, and the outer wall of the lower end of the fishing mandrel is provided with a ratchet which can be matched with the ratchet seat on the inner wall of the first clamping and hanging piece body of the pressure measuring device.
In one embodiment, a mounting groove is formed in the lower end face of the fishing head, the upper end of the fishing mandrel can extend into the mounting groove and is in clearance fit with the side wall of the mounting groove, and a second inclined surface is arranged between the lower end face of the mounting groove and the inner wall face.
Compared with the prior art, the pressure measuring device has the advantages that the first clamping hanging pieces correspond to the second clamping hanging pieces which are put into the shaft in advance one by one, so that the pressure measuring device can be accurately put in place and is reliable in function. Meanwhile, a plurality of second clamping hanging pieces can be put into the planned well depth in advance, and one or more pressure measuring devices are put into the well depth to measure the pressure according to the production state of the gas well in the later period. In addition, the pressure measuring device is simple in structure and reliable in clamping, and stable data can be guaranteed. In addition, the pressure measuring device can break through the limitation of well deviation, furthest exerts the advantages of the pressure measuring device, measures pressure closer to a production zone, and provides data support for formulating a production system of a gas well and developing a gas reservoir.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
fig. 1 shows a feeding operation state diagram of a pressure measuring device according to an embodiment of the present invention;
fig. 2 is a view illustrating a pressure measuring operation state of a pressure measuring device according to an embodiment of the present invention;
FIG. 3 shows a fishing operation state diagram of a pressure measuring device according to an embodiment of the invention;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 shows a state diagram in which the load measuring device 100 according to the present invention is fed. As shown in fig. 1, the pressure measuring device 100 includes a feeding spindle 1, a first hanger 4, and a pressure gauge 5. Wherein, the feeding and releasing core shaft 1 is in a shaft shape and mainly plays a role in connection. The first clamping hanger 4 is sleeved on the outer wall of the lower end of the feeding core shaft 1 and is used for being matched with the second clamping hanger 200, so that clamping is achieved to limit the position of the pressure measuring device 100. And a pressure gauge 5 is fixedly arranged at the lower end of the first clamping hanging member 4 and used for measuring the fluid pressure in the well bore. The delivery mandrel 1 is selectively connectable to the first catch 4 to lift the delivery mandrel 1 out of the wellbore after the pressure measuring device 100 is delivered into a designated position.
The invention also relates to a pipe string. As shown in fig. 1, the tube string includes the above-described load measuring device 100 and the second hanger 200. The second hooking member 200 has a cylindrical structure, and a second hooking portion 201 is formed on an inner wall thereof. During construction, the second hanger 200 is first lowered into the wellbore following the pipe string.
Before construction, the second tubular hanger 200 is set on the pipe string and is first lowered into the well bore along with the pipe string. The pressure measurement device 100 is only run into the wellbore when downhole pressure testing is required. This way the pressure measuring device 100 does not affect other gas well operations. Meanwhile, the pressure measuring device 100 is put in after, so that the full drift diameter of the pipe column is not influenced. In addition, because the pressure measuring device 100 is connected with the second clamping and hanging piece 200 through clamping and hanging, the connection stability is guaranteed, the requirement for well deviation is lowered, the limitation of the well deviation is broken through, and the advantages of the pressure measuring device in the well are played to the maximum extent.
In one embodiment, the first clip member 4 includes a first clip member body 41, an elastic claw 42, and a first clip portion 43. The first fastener body 41 is cylindrical and is sleeved outside the feeding core shaft 1. The elastic claw 42 extends axially upward from the first catch member body 41. A plurality of elastic claws 42 are provided at intervals in the circumferential direction. The elastic claw 42 is fitted to the feeding and discharging mandrel 1 with a gap therebetween. The first catching portion 43 is provided on the outer peripheral wall of the elastic claw 42 and is configured as a radially protruding boss. Preferably, in order to increase the hooking stability, a plurality of spaced first hooking portions 43, for example, two, are provided in the axial direction. Correspondingly, the second hooking portion 201 is configured as a groove for mating with the first hooking portion 43. During the lowering of the pressure measuring device 100, the first hooking portion 43 is forced to radially contract the elastic claw 42, so as to ensure the smooth lowering of the pressure measuring device 100. When the first hooking part 43 reaches the position of the second hooking part 201, under the action of the elastic force of the first hooking part 43, the elastic claw 42 radially expands, so that the first hooking part 43 enters the second hooking part 201 and completes hooking to fix the pressure measuring device 100. The clamping and hanging structure is simple and easy to realize. In addition, due to the above structural features, the unique correspondence of the snap fit of the first snap fastener 4 and the second snap fastener 200 can be realized by changing the number, position, size, and other structures of the first snap fastener 43 and the corresponding second snap fastener 201. A plurality of second hangers 200 having second hangers 201 of different settings may be lowered into the shaft, and in the later construction process, the pressure measuring device 100 may be lowered to be matched with the second hangers 200 in appropriate positions. Thus, multiple pressure measurement devices 100 may be run in to measure pressures at different depth points, thereby accumulating more and more complete pressure data.
In one embodiment, as shown in FIG. 1, the delivery mandrel 1 has a shaft-like mandrel body 11 and a delivery head 12. Wherein, the feeding head 12 is arranged at the upper end of the mandrel main body 11, the radial section area of the feeding head is larger than that of the mandrel main body 11, and the feeding head is used for being fixedly connected with a feeding tool. For example, threads may be provided on the outer wall of the delivery head 12 to enable connection with a delivery tool. The mandrel main body 11 extends vertically, and the lower end of the mandrel main body is connected with the first clamping hanging piece 4 through a shearing pin 101, so that the feeding mandrel 1 can be selectively connected with the first clamping hanging piece 4. After the pressure measuring device 100 is fed to a predetermined position, the feeding mandrel 1 is lifted up, and the shearing pin 101 is sheared to lift out the feeding mandrel 1, as shown in fig. 2.
In one embodiment, a protective cover 6 is provided on the outside of the pressure gauge 5 for protecting the pressure gauge 5. The protective cover 6 is sleeved outside the pressure gauge 5 and is fixedly connected with the first clamping hanging piece 4. For example, the protective cover 6 may be configured in a barrel shape, an open end of which is fixed with the first catching piece 4, and a communication hole 61 is provided on a side wall or/and a bottom wall thereof to communicate with the outside, so that the pressure gauge 5 can contact fluid to obtain a more accurate pressure value. This arrangement protects the pressure gauge 5 from damage during running in or the like of the pressure gauge 5. Meanwhile, a sand control net can be arranged at the communication hole 61 to prevent impurities such as sand from entering the inner cavity of the protective cover 6 to influence the normal operation of the pressure gauge 5.
A ratchet seat 44 is fitted on an inner wall of the first hooking member body 41. The ratchet socket 44 can mate with the ratchet 303 of the fishing device 300 to lift the first snap hanger 4 out of the wellbore. That is to say, when the pressure measurement is not needed, the pressure measurement device 100 can be lifted out of the shaft to realize the full drift diameter, which is beneficial to the smooth implementation of the later-stage water drainage and gas production and other production and transportation process.
An upwardly facing first inclined surface 45 is provided between the upper end surface and the outer side surface of the elastic claw 42. The first ramp 45 is used to mate with a fishing device during fishing (discussed in detail below).
The invention also relates to a fishing device 300. As shown in fig. 3, the fishing device 300 includes a fishing head 301 and a fishing mandrel 302. The fishing head 301 is adapted to be connected to an external structure such that the external structure (e.g., coiled tubing) can be lowered into a predetermined position in the wellbore with the fishing apparatus 300. The fishing mandrel 302 is fixedly connected with the fishing head 301, and meanwhile, the fishing mandrel 302 can also be matched with the first clamping piece 4 positioned in the second clamping piece 200 in a locking manner. The fishing device 300 is lifted up to lift the first bail 4 out of the wellbore.
Specifically, a ratchet 303 is provided on the outer wall of the lower end of the fishing mandrel 302. In order to ensure the smooth matching and connection stability with the ratchet seat 44, a plurality of ratchets 303 are arranged on the outer wall of the lower end of the fishing mandrel 302. A plurality of ratchet teeth 303 are arranged side by side along the direction of extension of the fishing mandrel 302.
The lower end surface of the fishing head 301 is provided with a mounting groove 304. The upper end of the fishing mandrel 302 can extend into the mounting slot 304, such as by a threaded connection. The side walls of the mounting groove 304 are in clearance fit with the outer wall of the fishing mandrel 302. A second slope 305 is provided between the lower end surface of the mounting groove 304 and the inner wall surface. During the process of descending the fishing device 300, the second inclined surface 305 is inserted into an annular space formed by the first inclined surface 45 and the second clamping hanging piece 200, and along with the continuous descending of the fishing device 300, the second inclined surface 305 applies force to the first inclined surface 45 and actuates the elastic claw 42 to radially contract, so that the upper end of the elastic claw 42 is gathered in the installation groove 304, and meanwhile, the first clamping hanging part 43 is separated from the second clamping hanging part 201 to release clamping limitation.
The operation of the pressure measuring device 100 and associated string and fishing device 300 is discussed in detail below with respect to fig. 1-3.
First, the second clip 200 is set on the pipe string, and then the pipe string is run into the wellbore. After the gas well is put in place, the second clamping and hanging piece 200 is cylindrical, so that the operation of other gas wells is not influenced.
When pressure measurement is required, the pressure measuring device 100 is lowered into the string via a running tool such as coiled tubing. During the lowering of the pressure measuring device 100, the elastic claws 42 radially contract and do not prevent the lowering of the pressure measuring device 100. When the first hooking portion 43 reaches the position of the second hooking portion 201, under the action of its own elasticity, the elastic claw 42 radially expands, so that the first hooking portion 43 and the second hooking portion 201 complete hooking, so as to fix the pressure measuring device 100, as shown in fig. 2.
Then, the tool is lifted up, and when the pressure reaches a certain value, the shear pin 101 is sheared. The payout mandrel 1 is lifted out of the wellbore. At this time, the first hanger 4 is set at a predetermined position, and the pressure gauge 5 measures the pressure.
When pressure measurement is not needed, the fishing device 300 can be put in, and the pressure measurement device 100 is fished out of the pipe column to realize full drift diameter. Specifically, the fishing device 300 is lowered, and the fishing device 300 is pressed down. During the downward movement of the force fishing device 300, the ratchet teeth 303 of the fishing device 300 are engaged with the ratchet seat 44 of the pressure measuring device 100 to form a locking structure. Meanwhile, the second inclined surface 305 applies force to the first inclined surface 45, and the elastic claw 42 is actuated to contract radially, so that the clamping limitation of the first clamping hanging piece 4 and the second clamping hanging piece 200 is released. Thus, the remaining pressure measurement devices 100 may be lifted out of the wellbore by lifting the fishing apparatus 300.
In the present application, the terms "upper" and "lower" are used with reference to the actual operating orientation of the pressure measuring device 100.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A pressure measurement device, comprising:
the feeding and releasing core shaft is arranged on the upper portion of the feeding and releasing core shaft,
a first clamping and hanging piece sleeved on the outer wall of the lower end of the feeding core shaft,
a pressure gauge arranged at the lower end of the first clamping hanging piece,
the feeding and releasing core shaft is selectively connected with the first clamping and releasing piece.
2. The load measuring device according to claim 1, wherein the first hooking member includes a first hooking member body, circumferentially spaced elastic claws extending axially upward from the first hooking member body, and first hooking portions protrudingly provided on an outer peripheral wall of the elastic claws, wherein the first hooking member body is selectively connectable to the feeding spindle, and the elastic claws extend upward to be loosely fitted to the feeding spindle.
3. The load measuring device according to claim 1 or 2, wherein the feeding spindle and the first hooking member are connected by a shear pin.
4. The pressure measuring device according to any one of claims 1 to 3, wherein a protective cover for protecting the pressure gauge is provided outside the pressure gauge, and the protective cover is fixedly connected to the first hooking member.
5. The load measuring device according to claim 2, wherein a ratchet seat is embedded in an inner wall of the first hooking member body.
6. The load measuring device according to claim 2, wherein a first slope toward the upper end is provided between the upper end surface and the outer side surface of the elastic claw.
7. A string of pipes, comprising:
a second clip hanging piece is arranged on the second side of the frame,
the pressure measuring device according to any one of claims 1 to 6,
and in the process of lowering the pressure measuring device, the first clamping and hanging piece is matched with a corresponding second clamping and hanging piece which is lowered into the shaft in advance.
8. The pipe string according to claim 7, wherein the second hooking member is cylindrical and has a second hooking portion recessed on an inner wall thereof to be capable of being engaged with the first hooking portion of the first hooking member.
9. A fishing device, comprising:
the fishing head is arranged at the tail end of the fishing rod,
a fishing mandrel arranged at the lower end of the fishing head and extending downwards, wherein the outer wall of the lower end of the fishing mandrel is provided with a ratchet which can be matched with the ratchet seat on the inner wall of the first clamping piece body of the pressure measuring device according to any one of claims 1 to 6.
10. A fishing device as claimed in claim 9, wherein a mounting groove is provided on the lower end surface of the fishing head, the upper end of the fishing mandrel can extend into the mounting groove and be in clearance fit with the side wall of the mounting groove, and a second downward inclined surface is provided between the lower end surface of the mounting groove and the inner wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687837.0A CN112302630A (en) | 2019-07-29 | 2019-07-29 | Pressure measuring device, pipe string and fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687837.0A CN112302630A (en) | 2019-07-29 | 2019-07-29 | Pressure measuring device, pipe string and fishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302630A true CN112302630A (en) | 2021-02-02 |
Family
ID=74329440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910687837.0A Pending CN112302630A (en) | 2019-07-29 | 2019-07-29 | Pressure measuring device, pipe string and fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112302630A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116136153A (en) * | 2023-04-20 | 2023-05-19 | 中国石油大学(华东) | Drill rod for petroleum exploitation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311194A (en) * | 1979-08-20 | 1982-01-19 | Otis Engineering Corporation | Liner hanger and running and setting tool |
| CN2406063Y (en) * | 1999-12-29 | 2000-11-15 | 沈阳市新东升石油仪器研究所 | Storage-type electronic pressure gage |
| CN105672944A (en) * | 2016-01-20 | 2016-06-15 | 中国石油化工股份有限公司 | Sliding sleeve opening device |
| CN205400660U (en) * | 2016-03-07 | 2016-07-27 | 荆州市赛瑞能源技术有限公司 | Inside blanking plug of oil pipe |
| CN206360656U (en) * | 2016-11-30 | 2017-07-28 | 中石化石油工程技术服务有限公司 | A kind of hanger and oil pipe positioner, the logging assembly using the hanger |
| CN107304659A (en) * | 2016-04-22 | 2017-10-31 | 中国石油化工股份有限公司 | A kind of plugging device |
| CN109138900A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of plugging device is located pipe nipple and cooperating equipment |
-
2019
- 2019-07-29 CN CN201910687837.0A patent/CN112302630A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311194A (en) * | 1979-08-20 | 1982-01-19 | Otis Engineering Corporation | Liner hanger and running and setting tool |
| CN2406063Y (en) * | 1999-12-29 | 2000-11-15 | 沈阳市新东升石油仪器研究所 | Storage-type electronic pressure gage |
| CN105672944A (en) * | 2016-01-20 | 2016-06-15 | 中国石油化工股份有限公司 | Sliding sleeve opening device |
| CN205400660U (en) * | 2016-03-07 | 2016-07-27 | 荆州市赛瑞能源技术有限公司 | Inside blanking plug of oil pipe |
| CN107304659A (en) * | 2016-04-22 | 2017-10-31 | 中国石油化工股份有限公司 | A kind of plugging device |
| CN206360656U (en) * | 2016-11-30 | 2017-07-28 | 中石化石油工程技术服务有限公司 | A kind of hanger and oil pipe positioner, the logging assembly using the hanger |
| CN109138900A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of plugging device is located pipe nipple and cooperating equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116136153A (en) * | 2023-04-20 | 2023-05-19 | 中国石油大学(华东) | Drill rod for petroleum exploitation |
| CN116136153B (en) * | 2023-04-20 | 2023-10-13 | 中国石油大学(华东) | Drill rod for petroleum exploitation |
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Application publication date: 20210202 |