CN110847864A - Sliding sleeve striker type injection tool and drainage method - Google Patents
Sliding sleeve striker type injection tool and drainage method Download PDFInfo
- Publication number
- CN110847864A CN110847864A CN201810949936.7A CN201810949936A CN110847864A CN 110847864 A CN110847864 A CN 110847864A CN 201810949936 A CN201810949936 A CN 201810949936A CN 110847864 A CN110847864 A CN 110847864A
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- China
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- section
- hole
- sliding sleeve
- oil pipe
- plugging
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The invention discloses a sliding sleeve striker type injection tool and a drainage method, and belongs to the field of oilfield equipment. The tool comprises: nipple joint, trompil round pin and sliding sleeve. The top end of the short section is connected with the first oil pipe section, the bottom end of the short section is connected with the second oil pipe section, and the deposition water is located in the first oil pipe section. The trompil pin includes: the shutoff section and the trompil section that link together, the shutoff section is located the nipple joint, and the trompil section is located the lateral wall of nipple joint, and is provided with the through-hole along the axial in the trompil section, and the one end of through-hole is by the shutoff section shutoff, the other end and the annular intercommunication of oil jacket ring. The sliding sleeve is sleeved in the short section, the bottom end of the sliding sleeve is in contact with the plugging section and used for applying force to cut off the plugging section, so that one end of the through hole is communicated with the short section. According to the invention, the plugging section is cut off by applying force through the sliding sleeve, the through hole in the opening section is communicated with the oil sleeve annulus and the short section, and gas or foam discharging agent in the air of the oil sleeve can enter the oil pipe through the through hole for draining, so that the operation is simple and convenient, the labor intensity is reduced, and the risk of damaging the sleeve is avoided.
Description
Technical Field
The invention relates to the field of oilfield equipment, in particular to a sliding sleeve striker type injection tool and a drainage method.
Background
When the gas well is normally produced, the oil pipe is put into the gas well casing to produce gas. As the gas production age increases, water vapor and the like in the produced gas are deposited in the oil pipe to form deposition water, and the gas production is influenced. Therefore, it is necessary to clean the deposited water in the oil pipe.
In the prior art, in order to discharge sediment water, a perforating gun is put into an oil pipe to a position below the sediment water, a through hole is formed in the side wall of the oil pipe by the perforating gun, so that the oil pipe is communicated with an oil sleeve annulus (an annular space between the oil pipe and a sleeve), high-pressure gas or foam discharging agent is injected into the oil sleeve from a wellhead, the high-pressure gas or the foam discharging agent enters the oil pipe through the through hole, and the sediment water is lifted upwards by the energy of the high-pressure gas or the foam discharging agent.
The inventor finds that the prior art has at least the following problems:
the operation difficulty of putting the perforating gun into the oil pipe to eject the through hole is high, the manpower and material resources are wasted, and the casing pipe is possibly damaged in the perforating process.
Disclosure of Invention
The embodiment of the invention provides a sliding sleeve striker type injection tool and a drainage method, which can solve the technical problem. The specific technical scheme is as follows:
a slide-in striker-type injection tool is provided, the tool comprising: the short section, the tapping pin and the sliding sleeve;
the top end of the short section is connected with the first oil pipe section, the bottom end of the short section is connected with the second oil pipe section, and the deposited water is located in the first oil pipe section;
the hole forming pin includes: the sealing section is positioned in the short section, the open section is positioned in the side wall of the short section, a through hole is axially formed in the open section, one end of the through hole is sealed by the sealing section, and the other end of the through hole is communicated with the oil sleeve annulus;
the sliding sleeve is sleeved in the short section, the bottom end of the sliding sleeve is in contact with the plugging section and is used for applying force to cut off the plugging section so as to enable one end of the through hole to be communicated with the short section.
In one possible embodiment, the shear force of the plug section is greater than or equal to 15KN and less than or equal to 20 KN.
In one possible embodiment, the diameter of the through-opening is equal to half the diameter of the opening section.
In one possible design, the number of the hole forming pins is one or more.
In one possible design, a plurality of the hole-opening pins are uniformly distributed on the same height of the short section along the circumferential direction.
In one possible design, the short section comprises a first section, a second section and a third section which are sequentially connected from top to bottom;
the opening section is positioned in the side wall of the second section, the first section is in threaded connection with the first oil pipe section, and the third section is in threaded connection with the second oil pipe section.
In one possible design, the outer diameter of the third section is equal to the inner diameter of the first section, the inner wall of the first section is provided with internal threads, and the outer wall of the third section is provided with external threads.
In one possible design, the outer diameter of the sliding sleeve is equal to the inner diameter of the short section.
In one possible design, one end of the through hole extends into the nipple.
There is provided a method of draining water using a slide-on striker injection tool of any of the above, the method comprising:
applying pressure through the sliding sleeve, cutting off the plugging section, and communicating one end of the through hole with the short section and communicating the other end with the oil sleeve annulus;
and injecting gas or foam discharging agent into the hollow part of the oil sleeve, wherein the gas or foam discharging agent enters the short section through the through hole and flows upwards to enter the first oil pipe section to lift the deposited water upwards.
In one possible design, the applying pressure through the sliding sleeve shears the plugging section, and the plugging section comprises:
putting a sealing ball matched with the sliding sleeve into the first oil pipe section, wherein the sealing ball seals the top opening of the sliding sleeve, then injecting gas or liquid into the first oil pipe to suppress pressure, generating downward pressure on the sliding sleeve, and shearing off the blocking section;
or, a heavy hammer is put into the short section through the first oil pipe section, the heavy hammer downwards strikes the sliding sleeve to generate downward pressure, and the blocking section is cut off.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the sliding sleeve striker type injection tool provided by the embodiment of the invention has the advantages that the short section is not communicated with the oil sleeve annulus through the tapping pin arranged on the side wall of the short section, when the deposited water needs to be discharged, the plugging section is sheared through the force applied by the sliding sleeve, the through hole in the tapping section is communicated with the oil sleeve annulus and the short section, and the gas or foam discharging agent in the air of the oil sleeve can enter the oil pipe through the through hole for discharging water, so that the operation is simple and convenient, the labor intensity is reduced, and the risk of damaging the sleeve is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a slide-in striker type injection tool according to an embodiment of the present invention.
The reference numerals denote:
1-a short section of a pipe, wherein,
11-the first section of the process,
12-the second section of the process,
13-a third stage of the process,
2-a pin with a hole is arranged,
21-a plugging section, wherein the plugging section comprises a plugging section,
22-a section of the open-cell,
3-the sliding sleeve is arranged on the upper part of the sliding sleeve,
4-through holes.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a sliding sleeve striker type injection tool, as shown in fig. 1, comprising: the pipe nipple comprises a short section 1, a hole-opening pin 2 and a sliding sleeve 3;
the top end of the short section 1 is connected with the first oil pipe section, the bottom end of the short section is connected with the second oil pipe section, and the deposited water is located in the first oil pipe section;
the hole forming pin 2 includes: the shutoff section 21 and the trompil section 22 that link together, shutoff section 21 are located nipple joint 1, and trompil section 22 is located the lateral wall of nipple joint 1, and is provided with through-hole 4 along the axial in the trompil section 22, and the one end of through-hole 4 is by the shutoff of shutoff section 21, and the other end and the annular intercommunication of oil jacket ring. (ii) a
The sliding sleeve 3 is sleeved in the short section 1, the bottom end of the sliding sleeve is in contact with the plugging section 21, and the sliding sleeve is used for applying force to cut the plugging section 21 so as to enable one end of the through hole 4 to be communicated with the short section 1.
The working principle of the sliding sleeve striker type injection tool provided by the embodiment of the invention is explained as follows:
the nipple 1 is connected between a first oil pipe section and a second oil pipe section, the nipple 1 is put into a casing along with the oil pipe, the second oil pipe section and the casing are fixed through a packer, and the oil pipe containing the nipple 1 is fixed in the casing. And during normal gas production, the produced gas is discharged to the wellhead through the second oil pipe section, the short section 1 and the first oil pipe section in sequence. The water vapor in the produced gas is liquefied and deposited to form deposition water in the first oil pipe section.
When drainage is carried out, because the sliding sleeve 3 is sleeved in the short section 1, the bottom end is in contact with the plugging section 21, pressure is applied through the sliding sleeve 3, and the plugging section 21 is cut off. The hole-opening pin 2 is arranged on the side wall of the short section 1, a through hole 4 is arranged in the hole-opening section 22, one end of the through hole 4 is blocked by the blocking section 21, and the other end of the through hole is communicated with the oil sleeve annulus. After the plugging section 21 is cut off, one end of the through hole 4 is communicated with the nipple 1, and the other end of the through hole is communicated with the oil sleeve annulus. And then injecting gas or foam discharging agent into the oil sleeve annulus, wherein the gas or foam discharging agent enters the nipple 1 through the through hole 4 and flows upwards to enter the first oil pipe section to lift the deposited water upwards.
Therefore, the sliding sleeve striker type injection tool provided by the embodiment of the invention enables the short section 1 not to be communicated with the oil sleeve annulus through the open pore pin 2 arranged on the side wall of the short section 1, when the deposited water needs to be discharged, the plugging section 21 is cut off by applying force through the sliding sleeve 3, the through hole 4 in the open pore section 22 is communicated with the oil sleeve annulus and the short section 1, and the gas or foam discharging agent in the oil sleeve can enter the oil pipe through the through hole 4 for drainage, so that the operation is simple and convenient, the labor intensity is reduced, and the risk of damaging the sleeve is avoided.
The plugging section 21 plugs the open hole section 22 and supports the sliding sleeve 3 when working normally, and shears when applying force, for example, the shearing force of the plugging section 21 is greater than or equal to 15KN and less than or equal to 20KN, for example, 15KN, 18KN, 20KN, and the like. So set up, the shutoff section 21 can not fracture when the guarantee normally adopts gas, improves stability in use, cuts when reaching the default size through sliding sleeve 3 application of force, removes the shutoff to trompil section 22.
Optionally, the diameter of the through hole 4 is equal to half of the diameter of the perforated section 22, so that the communication path between the pup joint 1 and the oil casing annulus is large on the premise of ensuring the strength of the perforated section 22. For example, the diameter of the opening section 22 may be 12mm, and correspondingly, the diameter of the through hole 4 is 6 mm.
When making shutoff section 21 cut off, through-hole 4 can communicate the oil jacket annular space and nipple joint 1, and the one end of through-hole 4 stretches into in the nipple joint 1. So set up, the one end of through-hole 4 stretches into in nipple joint 1, and the length of nipple joint 1 surpasss the inner wall of nipple joint 1 promptly, and when shutoff section 21 was cut, the position of cutting takes place in the inner wall department of nipple joint 1, and the shutoff of through-hole 4 is relieved to the end capping section.
The number of the hole-forming pins 2 can be one or more, and all the hole-forming pins can be used for the normal use of the sliding bush striker type injection tool provided by the embodiment of the invention.
Optionally, the number of the cotter pins 2 is multiple, and the plurality of cotter pins 2 are evenly distributed on the same height of the lateral wall of the short section 1 along the circumferential direction. So set up, during 3 applications of force of sliding sleeve, the shutoff section 21 on every trompil round pin 2 all splits, and 1 insidely of nipple joint can be through a plurality of through-holes 4 and the annular intercommunication of oil jacket, can pour into gas or bubble into from a plurality of positions and arrange the agent, improves injection efficiency.
For example, when the number of the cotter pins 2 is two, the two cotter pins 2 are located on a straight line and are oppositely arranged on the side wall of the short section 1. When the number of the perforated pins 2 is 3, the included angle between two adjacent perforated pins 2 is 60 degrees.
In the embodiment of the invention, a short section 1 is connected between oil pipes, and a side wall of the short section 1 is provided with a hole-opening pin 2, and the structure of the short section 1 is exemplified as follows:
as shown in fig. 1, the short section 1 comprises a first section 11, a second section 12 and a third section 13 which are connected in sequence from top to bottom;
the perforated section 22 is located in the side wall of the second section 12, the first section 11 is in threaded connection with the first tubing section, and the third section 13 is in threaded connection with the second tubing section.
So configured, the first section 11 and the third section 13 are used as connecting sections, and the opening section 22 of the opening pin 2 is located in the side wall of the second section 12, so that the connection of the first oil pipe section and the second oil pipe section does not interfere with the operation of the opening pin 2. And the threaded connection is convenient for installation and disassembly.
Optionally, the outer diameter of the third section 13 is equal to the inner diameter of the first section 11, the inner wall of the first section 11 is provided with internal threads, and the outer wall of the third section 13 is provided with external threads. So set up, the external screw thread of third section 13 and the internal thread threaded connection of second oil pipe section, the internal thread of first end and the internal thread threaded connection of first oil pipe section, and the internal diameter of third section 13 equals the internal diameter of first section 11 and makes nipple 1 connect the surface smooth behind the oil pipe. And when the short section 1 needs to be removed, the internal thread of the first oil pipe section is connected with the external thread of the second oil pipe section by screw thread.
3 covers of sliding sleeve locate nipple joint 1 in, the external diameter of sliding sleeve 3 equals the internal diameter of nipple joint 1, makes sliding sleeve 3's outer wall and nipple joint 1's inner wall in close contact with, can avoid rocking of sliding sleeve 3, can be again when dropping into the ball sealer to suppress pressure sliding sleeve 3 and nipple joint 1's leakproofness better.
Optionally, the inner diameter of the second section 12 is equal to the inner diameter of the first section 11 and is larger than the inner diameter of the third section 13, and a tapered section with an inner diameter gradually decreasing from top to bottom is arranged at the joint of the second section 12 and the third section 13, so that the flow of the fluid is relatively smooth.
The embodiment of the invention provides a method for draining water by using the sliding sleeve striker type injection tool, which comprises the following steps:
applying pressure through the sliding sleeve 3, cutting off the plugging section 21, and communicating one end of the through hole 4 with the nipple 1 and the other end with the oil sleeve annulus;
and injecting gas or foam discharging agent into the hollow part of the oil sleeve, wherein the gas or foam discharging agent enters the short section 1 through the through hole 4 and flows upwards to enter the first oil pipe section to lift the deposited water upwards.
When drainage is carried out, because the sliding sleeve 3 is sleeved in the short section 1, the bottom end is in contact with the plugging section 21, pressure is applied through the sliding sleeve 3, and the plugging section 21 is cut off. The hole-opening pin 2 is arranged on the side wall of the short section 1, a through hole 4 is arranged in the hole-opening section 22, one end of the through hole 4 is blocked by the blocking section 21, and the other end of the through hole is communicated with the oil sleeve annulus. After the plugging section 21 is cut off, one end of the through hole 4 is communicated with the nipple 1, and the other end of the through hole is communicated with the oil sleeve annulus. And then injecting gas or foam discharging agent into the oil sleeve annulus, wherein the gas or foam discharging agent enters the nipple 1 through the through hole 4 and flows upwards to enter the first oil pipe section to lift the deposited water upwards.
Therefore, the drainage method provided by the embodiment of the invention has the advantages that the pup joint 1 is not communicated with the oil sleeve annulus through the perforated pin 2 arranged on the side wall of the pup joint 1, when the deposited water needs to be discharged, the plugging section 21 is cut off through the force application of the sliding sleeve 3, the through hole 4 in the perforated section 22 is communicated with the oil sleeve annulus and the pup joint 1, the air or foam drainage agent in the oil sleeve can enter the oil pipe through the through hole 4 for drainage, the operation is simple and convenient, the labor intensity is reduced, and the risk of damaging the sleeve is avoided.
How to shear the plugging section 21 by applying pressure through the sliding sleeve 3 is described as follows:
a sealing ball matched with the sliding sleeve 3 is put into the first oil pipe section, the sealing ball seals the top opening of the sliding sleeve 3, then gas or liquid is injected into the first oil pipe to suppress pressure, downward pressure is generated on the sliding sleeve 3, and the blocking section 21 is cut off under the action of the pressure;
or, a heavy hammer is put into the nipple 1 through the first oil pipe section, the heavy hammer downwards strikes the sliding sleeve 3 to generate downward pressure, and the plugging section 21 is sheared under the action of the pressure.
The plugging section 21 is cut off when the two modes can apply pressure through the sliding sleeve 3 phase plugging section 21, and a worker can select a proper force application mode according to field use requirements and working conditions.
Optionally, the inner wall of the upper end of the sliding sleeve 3 may be provided with a ball seat, and the ball seat is of a reducing structure with an inner diameter gradually reduced from top to bottom, so that the sealing ball is in close contact with the sliding sleeve 3. The sealing ball can be a soluble ball, and is initially contacted with the sliding sleeve 3 when being pressed down, so that the plugging section 21 can be cut off. After the end-sealing section is cut off, the soluble balls are slowly dissolved in the underground, subsequent fishing operation is not needed, and the labor intensity is reduced.
It can be understood that, when the weight is put into and strikes the sliding sleeve 3, the diameter of the weight is smaller than the inner diameter of the oil pipe and larger than the inner diameter of the sliding sleeve 3, and the weight contacts with the end face of the top end of the sliding sleeve 3 to drive the sliding sleeve 3 to move downwards.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A slide and striker type injection tool, comprising: the pipe joint comprises a short section (1), a perforated pin (2) and a sliding sleeve (3);
the top end of the short section (1) is connected with a first oil pipe section, the bottom end of the short section is connected with a second oil pipe section, and the deposited water is located in the first oil pipe section;
the hole forming pin (2) comprises: the pipe joint comprises a plugging section (21) and a hole opening section (22) which are connected together, wherein the plugging section (21) is positioned in the short section (1), the hole opening section (22) is positioned in the side wall of the short section (1), a through hole (4) is axially arranged in the hole opening section (22), one end of the through hole (4) is plugged by the plugging section (21), and the other end of the through hole is communicated with an oil sleeve annulus;
the sliding sleeve (3) is sleeved in the short section (1), the bottom end of the sliding sleeve is in contact with the plugging section (21) and is used for applying force to shear the plugging section (21), so that one end of the through hole (4) is communicated with the short section (1).
2. Tool according to claim 1, characterized in that the shearing force of the plugging section (21) is greater than or equal to 15KN and less than or equal to 20 KN.
3. Tool according to claim 1, characterized in that the diameter of the through hole (4) is equal to half the diameter of the open hole section (22).
4. Tool according to claim 1, characterized in that the number of said apertured pins (2) is one or more.
5. Tool according to claim 4, characterized in that a plurality of said cotter pins (2) are evenly distributed circumferentially on the same level of said sub (1).
6. Tool according to claim 1, characterized in that said nipple (1) comprises a first section (11), a second section (12) and a third section (13) connected in sequence from top to bottom;
the open hole section (22) is positioned in the side wall of the second section (12), the first section (11) is in threaded connection with the first oil pipe section, and the third section (13) is in threaded connection with the second oil pipe section.
7. Tool according to claim 6, characterized in that the outer diameter of the third section (13) is equal to the inner diameter of the first section (11), the inner wall of the first section (11) being provided with an internal thread and the outer wall of the third section (13) being provided with an external thread.
8. Tool according to claim 1, characterized in that the outer diameter of the sliding sleeve (3) is equal to the inner diameter of the nipple (1).
9. A method of draining water using the slide plunger injection tool of any of claims 1-8, the method comprising:
applying pressure through the sliding sleeve (3), shearing off the plugging section (21), and communicating one end of the through hole (4) with the nipple (1) and communicating the other end with the oil sleeve annulus;
and injecting gas or foam discharging agent into the hollow part of the oil sleeve, wherein the gas or foam discharging agent enters the short section (1) through the through hole (4), flows upwards and enters the first oil pipe section to lift the deposited water upwards.
10. Method according to claim 9, wherein said pressure is applied by means of a sliding sleeve (3) and the plugging section (21) is sheared off, comprising:
throwing a sealing ball matched with the sliding sleeve (3) into the first oil pipe section, wherein the sealing ball seals the top end opening of the sliding sleeve (3), then injecting gas or liquid into the first oil pipe to build pressure, generating downward pressure on the sliding sleeve (3), and shearing off the sealing section (21);
or, a heavy hammer is put into the nipple (1) through the first oil pipe section, the heavy hammer downwards strikes the sliding sleeve (3) to generate downward pressure, and the blocking section (21) is sheared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949936.7A CN110847864A (en) | 2018-08-20 | 2018-08-20 | Sliding sleeve striker type injection tool and drainage method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949936.7A CN110847864A (en) | 2018-08-20 | 2018-08-20 | Sliding sleeve striker type injection tool and drainage method |
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| Publication Number | Publication Date |
|---|---|
| CN110847864A true CN110847864A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810949936.7A Pending CN110847864A (en) | 2018-08-20 | 2018-08-20 | Sliding sleeve striker type injection tool and drainage method |
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| CN (1) | CN110847864A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2171434B (en) * | 1985-02-19 | 1988-02-10 | Hughes Tool Co | Well tubing valve |
| CN2244090Y (en) * | 1996-05-08 | 1997-01-01 | 辽河石油勘探局高升采油厂 | Shearing high temperature resistance anti-corrosion oil drainage device |
| CN201351486Y (en) * | 2009-02-09 | 2009-11-25 | 王丹 | Sedimentation cup type oil draining device |
| CN201884003U (en) * | 2010-05-24 | 2011-06-29 | 中国石油天然气股份有限公司 | Large-diameter shearing suspended tubing drain |
| CN103266873A (en) * | 2013-02-28 | 2013-08-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column |
| US8631875B2 (en) * | 2011-06-07 | 2014-01-21 | Baker Hughes Incorporated | Insert gas lift injection assembly for retrofitting string for alternative injection location |
| CN104358524A (en) * | 2014-11-17 | 2015-02-18 | 杰瑞能源服务有限公司 | Coiled tubing speed pipe column and liquid draining and gas collecting method |
| CN104790916A (en) * | 2015-04-24 | 2015-07-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for removing gas well accumulated liquid by means of oil jacket pressure balancing method |
-
2018
- 2018-08-20 CN CN201810949936.7A patent/CN110847864A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2171434B (en) * | 1985-02-19 | 1988-02-10 | Hughes Tool Co | Well tubing valve |
| CN2244090Y (en) * | 1996-05-08 | 1997-01-01 | 辽河石油勘探局高升采油厂 | Shearing high temperature resistance anti-corrosion oil drainage device |
| CN201351486Y (en) * | 2009-02-09 | 2009-11-25 | 王丹 | Sedimentation cup type oil draining device |
| CN201884003U (en) * | 2010-05-24 | 2011-06-29 | 中国石油天然气股份有限公司 | Large-diameter shearing suspended tubing drain |
| US8631875B2 (en) * | 2011-06-07 | 2014-01-21 | Baker Hughes Incorporated | Insert gas lift injection assembly for retrofitting string for alternative injection location |
| CN103266873A (en) * | 2013-02-28 | 2013-08-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column |
| CN104358524A (en) * | 2014-11-17 | 2015-02-18 | 杰瑞能源服务有限公司 | Coiled tubing speed pipe column and liquid draining and gas collecting method |
| CN104790916A (en) * | 2015-04-24 | 2015-07-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for removing gas well accumulated liquid by means of oil jacket pressure balancing method |
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