CN2521392Y - Underwall multifunction controller for natural gas well - Google Patents

Underwall multifunction controller for natural gas well Download PDF

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Publication number
CN2521392Y
CN2521392Y CN 01278478 CN01278478U CN2521392Y CN 2521392 Y CN2521392 Y CN 2521392Y CN 01278478 CN01278478 CN 01278478 CN 01278478 U CN01278478 U CN 01278478U CN 2521392 Y CN2521392 Y CN 2521392Y
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CN
China
Prior art keywords
natural gas
spring
gas well
barrel
seat
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.)
Expired - Lifetime
Application number
CN 01278478
Other languages
Chinese (zh)
Inventor
张书平
吴革生
王效明
张宏福
程小莉
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.)
Petrochina Co Ltd
China National Petroleum Corp
Original Assignee
Petrochina Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Petrochina Co Ltd filed Critical Petrochina Co Ltd
Priority to CN 01278478 priority Critical patent/CN2521392Y/en
Application granted granted Critical
Publication of CN2521392Y publication Critical patent/CN2521392Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

Disclosed is a down-hole multifunctional control device of a natural gas well for natural gas dislodging well, comprising sealing rings 8, 11, 19, 22, an upper glue barrel seat 9, an upper glue barrel 10, a lower glue barrel 12, a lower glue barrel 13, a spring seat 16, an outer barrel 17, a spring 18, a locking block 21, an air cock 25 and the like, wherein the upper glue barrel 10 is arranged on the upper glue barrel seat 9, the lower glue barrel 13 is disposed on the lower glue barrel 12, the spring seat 16, the outer barrel 17 and the spring 18 are installed inside a conic sleeve 15, a locking ring 20 is mounted on the locking block, and the air cock 25 is positioned between a lower connector 23 and a press cap 26. The utility model is capable of significantly ensuring the reliability and the success rate in using time. Simultaneously, the debugging and exchanging of the air cock on the ground are more convenient than a flow controller under the well. When used as a blanking plug, the utility model can be used dependently without depending on a working barrel. In addition, the arranging position can be grasped flexibly.

Description

Natural gas well down-hole multifunctional controller
Technical field:
The utility model is the well flow rate controller that uses in a kind of natural gas extraction well, specifically, is natural gas well down-hole multifunctional controller.
Background technology:
In the natural gas extraction well, in order to control gas well output, using a kind of well flow rate controller, domestic being seen this device is " underground throttle device " that the Sichuan gas production is studied.This device is sent in the well with steel wire for logging, relies on the slips location, utilizes the annular space of packing element Seal Oil inside pipe wall and device body, and air-flow can only be flowed out by the valve at device center, and gas well output size is controlled by the valve pore size.This device can only be used for the control well down-off, can not be used to seal the oil pipe passage.There is defective in this device aspect the packing element hermetically-sealed construction, and sealing reliability is relatively poor.The movable sealing pair can not obtain promoting the enough pressure reduction that it moves to left, thereby can not expand the formation secondary seal reliably; In addition, underground throttle device adopts spring pretension seat sealing mechanism, and from down-hole taking-up process, packing element is in the bulging state, and up resistance is big, causes bit freezing sometimes.
In the natural gas extraction well, often have permanent packer in the tubing string bottom that produces oil, cooperate with tubing plug, but the complete closed pit shaft stops the natural gas output, so that carry out the not kill-job operations such as pipe of changing oil.Blanking plug commonly used at present has product and its production domesticization product of petroleum tool companies such as external Bake, Vad good fortune, Ka Muke.Blanking plug is made up of urceolus and fuse two parts, and urceolus is installed on the oil pipe, go into the well with packer, the fuse ordinary circumstance need not, drop in the well again when need stopping up the oil pipe passage.Because the urceolus position is fixed, fuse must be thrown in the urceolus and just can work.Often can not arrive seating nipple in actual the use, thereby influence construction because of some reason makes fuse.
Summary of the invention:
The purpose of this utility model provides a kind of leakage problem that can effectively solve the secondary existence of underground throttle device movable sealing, thereby the reliability of the work of assurance, and realization self-locking, guarantee still to be in an envelope state after the upper lifting force cancellation, when needing to take out, discharge self-locking mechanism, packing element is retracted to the diameter before the seat envelope, the natural gas well down-hole multifunctional controller that can take out easily under unresisted situation.
The utility model is achieved in that by dispenser 1, release pin 2, slip spider 3, central tube 4, main body 5, slips 6, snap ring 7, sealing ring 8,11,19,22, last glue tube base 9, last packing element 10, lower rubber cylinder seat 12, lower rubber cylinder 13, movable sleeve 14, tapered sleeve 15, spring base 16, urceolus 17, spring 18, lock ring 20, lock dog 21, lower contact 23, valve 25, pressure cap 26 is formed, dispenser 1 is connected with central tube 4 by release pin 2, and main body 5 is arranged outside the central tube 4,6 of slips have snap ring 7 on the slips 6 on slip spider 3, last packing element 10 is arranged on the last glue tube base 9, lower rubber cylinder 13 is arranged on the lower rubber cylinder seat 12, movable sleeve 14 is arranged on the main body 5, spring base 16 is arranged in the tapered sleeve 15, urceolus 17, spring 18, lock ring 20 is arranged on the lock dog 21, between lower contact 23 and the pressure cap 26 valve 25 is arranged.
The utility model also adopts following technical scheme:
Between main body 5 and the last glue tube base 9 sealing ring 8 is arranged.
12 of main body 5 and lower rubber cylinder seats have sealing ring 11.
Between urceolus 17 and the tapered sleeve 15 sealing ring 19 is arranged.
Between spring base 16 and the lock dog 21 sealing ring 22 is arranged.
Spring 18 is located on the spring base 16.
The structural principle of the present invention and underground throttle device is close, but hermetically-sealed construction is different with seat envelope mode, adopts flow nipple with holes, can play underground throttle device, changes dead mouthpiece and can make tubing plug usefulness, can render to as required in any oil pipe.
The effect of invention:
Because hermetically-sealed construction of the present invention and seat envelope mode are more reasonable than underground throttle device, can guarantee reliability and the success rate used preferably, ground debugging simultaneously and to change valve more easily than underground throttle device.Do not rely on seating nipple during as blanking plug, can use separately, the installation site can be grasped flexibly.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Concrete enforcement
As shown in Figure 1, the present invention is mainly by dispenser 1, release pin 2, slip spider 3, central tube 4, main body 5, slips 6, snap ring 7, sealing ring 8,11,19,22, last glue tube base 9, last packing element 10, lower rubber cylinder seat 12, lower rubber cylinder 13, movable sleeve 14, tapered sleeve 15, spring base 16, urceolus 17, spring 18, lock ring 20, lock dog 21, lower contact 23, valve 25, pressure cap 26 is formed.
The hermetically-sealed construction of packing element part of the present invention is different with original underground throttle device hermetically-sealed construction.The utility model is equipped with lower rubber cylinder seat 12, and has designed sealing ring spare 11 in lower rubber cylinder seat 12, thereby has solved the secondary leakage problem that exists of underground throttle device movable sealing, has guaranteed the reliability of work.
Original underground throttle device adopts spring pretension seat sealing mechanism, and from down-hole taking-up process, packing element is in the bulging state, and up resistance is big, causes bit freezing sometimes.And the utility model by on carry central tube 4 and finish seat envelope, the self-locking mechanism that relies on part spring base 16, urceolus 17, spring 18, lock ring 20, lock dog 21 etc. to constitute is realized self-locking, guarantee still to be in an envelope state after the upper lifting force cancellation, when needing to take out, discharge self-locking mechanism, packing element is retracted to the diameter before the seat envelope, can take out easily under unresisted situation.
The present invention is installed in valve 25 bottom, and field adjustable and replacing are very convenient.And the valve of original underground throttle device is installed present sealing mechanism inside, the field adjustable more complicated, and it is time-consuming to require great effort.
The present invention changes valve 25 " dead mouthpiece " of no centre bore into, promptly can be used for stopping up in the not kill-job preventing spraying operation oil pipe passage.
In the gas production tubing string, throw in natural gas well down-hole multifunctional controller, the production of control output.After with steel wire for logging this controller being rendered to projected depth, on carry and make slips open the location, the action of seat sealing mechanism makes the packing element bulging, seal body and oil pipe annular space, self-locking mechanism is realized self-locking simultaneously, guarantees still to be in an envelope state after upper lifting force is cancelled.When needing to take out this controller, utilize under the fishing tool and hit, discharge self-locking mechanism, packing element is pressurized no longer, relies on the diameter before its elastic shrinkage arrives the seat envelope, can take out easily under unresisted situation.This and underground throttle device are made a world of difference: when putting forward the seat envelope on the underground throttle device, it is precompressed spring when discharging ground-mounted, rely on spring thrust to guarantee packing element and valve sealing for a long time, in the time of need taking out in the future, packing element still is subjected to spring thrust to be in the bulging state, pick-up drag is very big, and the most cases lower rubber cylinder is torn into fragment and falls in the well; Spring easily ruptures midway, thereby causes operational failure in the medium-term and long-term work of downhole corrosion environment.
When non-well killing change well head gate, this controller is loaded onto dead mouthpiece, can make tubing plug and use.The blanking plug of mentioning in the background technology that seating nipple is arranged, its installation site about 3000 meters in the down-hole, if be used for non-well killing change well head gate, must the emptying well head in the oil pipe of blanking plug gases at high pressure in a large number, both influenced construction speed, waste natural gas again.Adopt the present invention, can render near the oil pipe of well head, significantly reduced the time and the emptying time of throwing in and taking out blanking plug, saved natural gas.The well realization oil pipe obstruction operation of blanking plug seat can be installed at flow string in addition.

Claims (6)

1. natural gas well down-hole multifunctional controller, by dispenser (1), release pin (2), slip spider (3), central tube (4), main body (5), slips (6), snap ring (7), sealing ring (8), (11), (19), (22), last glue tube base (9), last packing element (10), lower rubber cylinder seat (12), lower rubber cylinder (13), movable sleeve (14), tapered sleeve (15), spring base (16), urceolus (17), spring (18), lock ring (20), lock dog (21), lower contact (23), valve (25), pressure cap (26) is formed, dispenser (1) is connected with central tube (4) by release pin (2), main body (5) is arranged outside the central tube (4), and slips (6) seat has snap ring (7) on the slips (6) on slip spider (3), it is characterized in that: going up on the glue tube base (9) has last packing element (10), lower rubber cylinder (13) is arranged on the lower rubber cylinder seat (12), movable sleeve (14) is arranged on the main body (5), spring base (16) is arranged in the tapered sleeve (15), urceolus (17), spring (18), lock ring (20) is arranged on the lock dog (21), between lower contact (23) and the pressure cap (26) valve (25) is arranged.
2. the natural gas well according to claim 1 down-hole multifunctional controller is characterized in that: between main body (5) and the last glue tube base (9) sealing ring (8) is arranged.
3. the natural gas well according to claim 1 down-hole multifunctional controller is characterized in that: between main body (5) and lower rubber cylinder seat (12) sealing ring (11) is arranged.
4. the natural gas well according to claim 1 down-hole multifunctional controller is characterized in that: between urceolus (17) and the tapered sleeve (15) sealing ring (19) is arranged.
5. the natural gas well according to claim 1 down-hole multifunctional controller is characterized in that: between spring base (16) and the lock dog (21) sealing ring (22) is arranged.
6. the natural gas well according to claim 1 down-hole multifunctional controller is characterized in that: spring (18) is located on the spring base (16).
CN 01278478 2001-12-17 2001-12-17 Underwall multifunction controller for natural gas well Expired - Lifetime CN2521392Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01278478 CN2521392Y (en) 2001-12-17 2001-12-17 Underwall multifunction controller for natural gas well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01278478 CN2521392Y (en) 2001-12-17 2001-12-17 Underwall multifunction controller for natural gas well

Publications (1)

Publication Number Publication Date
CN2521392Y true CN2521392Y (en) 2002-11-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 01278478 Expired - Lifetime CN2521392Y (en) 2001-12-17 2001-12-17 Underwall multifunction controller for natural gas well

Country Status (1)

Country Link
CN (1) CN2521392Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103541698A (en) * 2012-07-12 2014-01-29 中国石油天然气股份有限公司 Gas well underground fixed yield throttling production device
CN103867167A (en) * 2012-12-10 2014-06-18 中国石油天然气股份有限公司 Downhole fixed bypass restrictor
CN104343426A (en) * 2013-08-02 2015-02-11 中国石油天然气股份有限公司 System and technology for intelligent throttling in natural gas well
CN111206899A (en) * 2020-01-07 2020-05-29 青岛理工大学 Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103541698A (en) * 2012-07-12 2014-01-29 中国石油天然气股份有限公司 Gas well underground fixed yield throttling production device
CN103541698B (en) * 2012-07-12 2016-01-20 中国石油天然气股份有限公司 Gas well down-hole fixed output quota amount throttling process units
CN103867167A (en) * 2012-12-10 2014-06-18 中国石油天然气股份有限公司 Downhole fixed bypass restrictor
CN103867167B (en) * 2012-12-10 2016-08-10 中国石油天然气股份有限公司 Down-hole fixed pattern bypass throttle device
CN104343426A (en) * 2013-08-02 2015-02-11 中国石油天然气股份有限公司 System and technology for intelligent throttling in natural gas well
CN111206899A (en) * 2020-01-07 2020-05-29 青岛理工大学 Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders

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GR01 Patent grant
C14 Grant of patent or utility model
CX01 Expiry of patent term

Expiration termination date: 20111217

Granted publication date: 20021120

C17 Cessation of patent right