CN2174564Y - Piston type sample-taking device underwell - Google Patents

Piston type sample-taking device underwell Download PDF

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Publication number
CN2174564Y
CN2174564Y CN 93209291 CN93209291U CN2174564Y CN 2174564 Y CN2174564 Y CN 2174564Y CN 93209291 CN93209291 CN 93209291 CN 93209291 U CN93209291 U CN 93209291U CN 2174564 Y CN2174564 Y CN 2174564Y
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CN
China
Prior art keywords
sampler
sampling
piston
piston type
shell
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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.)
Expired - Fee Related
Application number
CN 93209291
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Chinese (zh)
Inventor
陈鹤民
张关根
孙平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Exploration and Development Research Institute of PetroChina Changqing Oilfield Co
Original Assignee
Exploration and Development Research Institute of PetroChina Changqing Oilfield Co
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Publication date
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Priority to CN 93209291 priority Critical patent/CN2174564Y/en
Application granted granted Critical
Publication of CN2174564Y publication Critical patent/CN2174564Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a piston type subsurface sampler used for oil wells, gas wells and water wells. Compared with the existing subsurface sampler, the utility model is characterized in that a separator piston, a throttling valve, a slide valve, etc. are applied. Sampling is started after the utility model arrives to a sampling depth, and after the sampling is finished, a liquid inlet is closed; when displacing sampling liquid is driven, displacing liquid is not contacted with sampling liquid, the authenticity of the extracted sample is ensured, and the analysis accuracy of the sample is increased.

Description

Piston type sample-taking device underwell
The utility model relates to the downhole sampler of in a kind of oil, gas, the well stratum produced fluid being taken a sample.
In oil, gas, well manufacturing process, on request the stratum produced fluid is taken a sample under the maintenance reset condition, in the laboratory, institute's sample thief is carried out analysis and test then, thereby the stratum produced fluid is drawn a correct evaluation.
Present used downhole sampler is for scraping wall type, impacting type or clock controlled downhole sampler.Inlet and liquid outlet because of sampler in sampler is gone into the well process remain unlatching, and at this moment the fluid in the sampler tube is flowing always, after arriving depth selection, close the liquid in-out mouth under the effect of controlling organization, finish sampling.But because the difference that the lowering velocity of going into the well of the flowing velocity of fluid and sampler exists, and the part dead volume that exists in the sampler tube, cause the sample of being got can not represent the fluid on desired depth stratum fully.Simultaneously sampler does not have spacer assembly, often produces displacement fluid when advancing with displacement fluid displacement sampling liquid in the laboratory and is difficult for grasp with sampling liquid interface, easily pollutes institute's sample thief, has influenced the analysis precision of final sample.
The purpose of this utility model is specially at oil, gas, well sampler, design a kind of piston type downhole sampler, realization begins sampling to sampler after arriving desired depth, sampling is closed inlet after finishing, the separator piston in the sampling tube and the cooperation of choke valve, guiding valve pipe nipple etc. in addition, guarantee that institute's sample thief is the fluid on required stratum and has got rid of mixing of displacement fluid and the liquid of taking a sample, and has improved the analysis precision of sample greatly.
The piston type downhole sampler is by clock, release, guiding valve locker, guiding valve pipe nipple, pass liquid pipe, choke valve, connecting rod locker, connecting rod, separator piston, lower piston, add crimp head is connected with the sampler shell, and replaces sap cavity and sampling cavity and is connected.Release is made up of shell, jump ring, bearing, mandrel, spring and collision block.Collision block and mandrel are detained the time that how much has determined sampler hysteresis sampling action of number with screwed connection.Mandrel rotation under the control of clock drives, after the screw thread number that collision block and mandrel spin was all thrown off, collision block hit under rapid under the effect of spring, causes the action of guiding valve locker.The guiding valve locker is made up of lock tube, steel ball, spring and chuck.Because chuck is to be connected on the sampler shell, lock tube limits the radial displacement of steel ball under the effect of spring, and steel ball blocks slide bar simultaneously.When hitting under the collision block, force lock tube compression spring to move down, steel ball rolls out the locked groove of throwing off on the slide bar, the release of guiding valve locker, slide bar can move up.The guiding valve pipe nipple is made up of shell, spring, slide bar and sealing ring.Pass displacement fluid that the liquid pipe comes because the sealing of slide bar and sealing ring, can not flow into endoporus L and enter and replace in the sap cavity.Because the active force that the diameter G of slide bar makes progress greater than straight H and spring, so under the effect of displacement fluid, slide bar has a last top power to force slide bar to move up all the time, as long as guiding valve locking release, slide bar will move up and open the passage that passes liquid pipe and endoporus L, displacement fluid is flowed into replace in the sap cavity.Choke valve is made up of shell, valve seat, spool and sealing ring.The high pressure displacement fluid acts on and backs down spool on the valve seat, makes displacement fluid enter upper cavity D by valve seat orifice F and spool endoporus E, flows into through restriction C and passes the liquid pipe.When upper cavity D pressure raises, because the relation of area difference is closed valve seat orifice F.Otherwise, open valve seat orifice F again.Therefore, choke valve has played depressurization, guarantee that displacement fluid enters the pressure of pressure before far below choke valve that passes the liquid pipe, the guiding valve pipe nipple is worked under low-pressure state, improve the sensitivity of guiding valve pipe nipple, the flowing velocity of having slowed down displacement fluid simultaneously makes the sampling stable working, to avoid taking a sample liquid, make the distortion of sampling liquid because of excessive velocities causes " flash distillation " phenomenon.The connecting rod locker is made up of interior cover, steel ball, lock tube, mandrel, spring and nut.The upper end of mandrel and connecting rod is screwed connection, because the upper end of interior cover is fixed on the sampler shell shoulder, steel ball pins in the locked groove on mandrel top under the restriction of lock tube, connecting rod can not be moved up, fixedly connected with lower piston in the lower end of connecting rod, prevented when moving up and the friction of connecting rod produces pulling connecting rod and the up misoperation of lower piston, having made the sampling failure because of separator piston.Have only the separator piston of working as up, touch nut end face A, and continuation promotes the up and compression spring of lock tube, in being up to the locked groove of steel ball from the mandrel, withdraw from release, mandrel drivening rod and lower piston under the effect of spring move up together, instantly piston stroking upward is when jump ring blocks jump ring groove J on the sampler shell, and when closing the inlet K on the sampler shell, sampling finishes.
After sampler takes out pit shaft, in the laboratory, pump into displacement fluid and force the descending promotion sampling of separator piston liquid to be discharged in the instrument to analyze from the commentaries on classics sample mouth M of ball-and-seat on the sampler shell on the lower piston from adding crimp head.
The utlity model has following characteristics: at oil, gas, well sampler and a kind of piston type downhole sampler that designs, realize that sampler begins sampling after reaching desired depth, sampling is closed inlet after finishing, and the separator piston and the cooperations such as choke valve, guiding valve pipe nipple of design, guarantee that institute's sample thief is the fluid on required stratum and has got rid of mixing of displacement fluid and the liquid of taking a sample, and has improved the analysis precision of sample greatly.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is a schematic diagram before the utility model sampling.
1. clock; 2. release; 3; The guiding valve locker; 4. guiding valve pipe nipple; 5. pass the liquid pipe; 6. choke valve; 7. connecting rod locker; 8. connecting rod; 9. separator piston; 10. lower piston; 11. add crimp head; 12. sampler shell; 13. replacement sap cavity; 14. sampling cavity.
Fig. 2 is the utility model sampling process schematic diagram.
Fig. 3 is that the utility model sampling finishes schematic diagram.
Fig. 4 is a release sectional drawing of the present utility model.
1. clock; 15. shell; 16. jump ring; 17. bearing; 18. mandrel; 19. spring; 20. collision block.
Fig. 5 is a guiding valve locker sectional drawing of the present utility model.
21. lock tube; 22. steel ball; 23. spring; 24. chuck; 25. slide bar; 12. sampler shell.
Fig. 6 is a guiding valve pipe nipple sectional drawing of the present utility model.
25. slide bar; 26. shell; 27. spring; 28. sealing ring.
Fig. 7 is a choke valve sectional drawing of the present utility model.
29. sealing ring; 30. spool; 31. shell; 32. valve seat.
Fig. 8 is a connection locker sectional drawing of the present utility model.
33. interior cover; 34. steel ball; 35. lock tube; 36. mandrel; 37. spring; 38. nut; 8. connecting rod.
The utility model comprises clock (1), release (2), guiding valve locker (3), guiding valve pipe nipple (4) passes liquid pipe (5), choke valve (6), connecting rod locker (7), connecting rod (8), separator piston (9), lower piston (10), add crimp head (11), sampler shell (12) replaces sap cavity (13), sampling cavity (14).Before the sampling of going into the well (as Fig. 1), pump into displacement fluid on ground by adding crimp head (11), because the slide bar (25) on the guiding valve pipe nipple (4) is gone up steel ball (22) by guiding valve locker (3) and pinned, promote separator piston (9) and go downwards to bottom dead centre and lean on mutually with lower piston (10) top so displacement fluid only enters sampling cavity (14).Adjust mandrel (18) and collision block (20) screwed connection length on the release (2) according to the service working time of the sampling of going into the well then, with guarantee under the sampler before require the degree of depth collision block (20) can not hit down and cause misoperation.At this moment as requested sampler is arrived desired depth down, the mandrel (18) that clock (1) control rotation drives on the release (2) is thrown off from collision block (20), after collision block (20) and mandrel (18) screw thread are all thrown off, collision block (20) hits under rapid under the effect of spring (19), force the lock tube (21) on the guiding valve locker (3) to move down, steel ball (22) withdraws from from the locked groove of slide bar (25), at this moment guiding valve locker (3) release, slide bar (25) is up under the effect of the spring (27) on the guiding valve pipe nipple (4), opened the passage L on biography liquid pipe (5) and the guiding valve pipe nipple (4), at this moment sampling beginning (as shown in Figure 2).The inlet K of formation fluid on sampler shell (12) enters sampling cavity (14) bottom, and it is up and displacement fluid entered in the replacement sap cavity (13) through choke valve (6) and biography liquid pipe (5) to promote separator piston (9).Because the throttling action of choke valve (6) reduces and the feed liquor speed that slowed down the pressure that passes in the liquid pipe (5), sampling is in more steadily carries out, and avoids liquid to cause " flash distillation " phenomenon.When sampling liquid promotes up nut (38) the end face A that runs on the connecting rod locker (7) of separator piston (9), and continuation promotes the up and compression spring (37) of lock tube (35), when lock tube (35) is up to steel ball (34) when withdrawing from release from the locked groove of mandrel (36), mandrel (36) is under the effect of spring (37), drivening rod (8) and lower piston (10) move up together, at this moment the jump ring on the lower piston (10) snaps into the J groove on the sampler shell (12), close the inlet K on the sampler shell (12), sampling finishes (as shown in Figure 3), proposes sampler in well.
Pump into displacement fluid and force the descending promotion of separator piston (9) sampling liquid to be discharged in the instrument to analyze from adding crimp head (11) in the laboratory from the commentaries on classics sample mouth M of ball-and-seat on sampler shell (12) on the lower piston (10).

Claims (6)

1, the piston type downhole sampler used of a kind of oil, gas, well, it is characterized in that clock, release, guiding valve locker, guiding valve pipe nipple, pass the liquid pipe, choke valve, connecting rod locker, connecting rod, separator piston, lower piston, add crimp head and be connected, and replace sap cavity and sampling cavity and be connected with the sampler shell.
2, piston type downhole sampler according to claim 1 is characterized in that described release is to be connected by shell, jump ring, bearing, mandrel, spring and collision block.
3, piston type downhole sampler according to claim 1 is characterized in that described guiding valve locker is to be connected by lock tube, steel ball, spring and chuck.
4, piston type downhole sampler according to claim 1 is characterized in that described guiding valve pipe nipple is to be connected by shell, spring, slide bar and sealing ring.
5, piston type downhole sampler according to claim 1 is characterized in that described choke valve is to be connected by shell, valve seat, spool and sealing ring.
6, piston type downhole sampler according to claim 1 is characterized in that described connecting rod locker is to be connected by interior cover, steel ball, lock tube, mandrel, spring and nut.
CN 93209291 1993-04-08 1993-04-08 Piston type sample-taking device underwell Expired - Fee Related CN2174564Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 93209291 CN2174564Y (en) 1993-04-08 1993-04-08 Piston type sample-taking device underwell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 93209291 CN2174564Y (en) 1993-04-08 1993-04-08 Piston type sample-taking device underwell

Publications (1)

Publication Number Publication Date
CN2174564Y true CN2174564Y (en) 1994-08-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 93209291 Expired - Fee Related CN2174564Y (en) 1993-04-08 1993-04-08 Piston type sample-taking device underwell

Country Status (1)

Country Link
CN (1) CN2174564Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102619506A (en) * 2011-05-27 2012-08-01 中国石油化工股份有限公司 Displacement type sampler
CN102914454A (en) * 2012-11-15 2013-02-06 化学工业岩土工程有限公司 Drilling water taking device and water taking method
CN103195418A (en) * 2013-03-01 2013-07-10 西安洛科电子科技有限责任公司 Underground sampler
CN105134203A (en) * 2015-09-08 2015-12-09 大庆宏测技术服务有限公司 Multi-phase flow sampling logging instrument for withdrawal well
EP2912268A4 (en) * 2012-10-23 2016-10-12 Halliburton Energy Services Inc Selectable size sampling apparatus, systems, and methods
CN108691539A (en) * 2017-04-12 2018-10-23 中国石油天然气股份有限公司 A kind of sampler

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102619506A (en) * 2011-05-27 2012-08-01 中国石油化工股份有限公司 Displacement type sampler
US10294783B2 (en) 2012-10-23 2019-05-21 Halliburton Energy Services, Inc. Selectable size sampling apparatus, systems, and methods
EP2912268A4 (en) * 2012-10-23 2016-10-12 Halliburton Energy Services Inc Selectable size sampling apparatus, systems, and methods
CN102914454A (en) * 2012-11-15 2013-02-06 化学工业岩土工程有限公司 Drilling water taking device and water taking method
CN103195418A (en) * 2013-03-01 2013-07-10 西安洛科电子科技有限责任公司 Underground sampler
CN103195418B (en) * 2013-03-01 2016-08-10 西安洛科电子科技有限责任公司 A kind of downhole sampler
CN105134203A (en) * 2015-09-08 2015-12-09 大庆宏测技术服务有限公司 Multi-phase flow sampling logging instrument for withdrawal well
CN108691539A (en) * 2017-04-12 2018-10-23 中国石油天然气股份有限公司 A kind of sampler
CN108691539B (en) * 2017-04-12 2021-08-03 中国石油天然气股份有限公司 Sampler

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C19 Lapse of patent right due to non-payment of the annual fee
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