CN203308443U - Circulating gas injection pipe column - Google Patents

Circulating gas injection pipe column Download PDF

Info

Publication number
CN203308443U
CN203308443U CN201320286833XU CN201320286833U CN203308443U CN 203308443 U CN203308443 U CN 203308443U CN 201320286833X U CN201320286833X U CN 201320286833XU CN 201320286833 U CN201320286833 U CN 201320286833U CN 203308443 U CN203308443 U CN 203308443U
Authority
CN
China
Prior art keywords
gas injection
sleeve
circulation
intubate
pipe column
Prior art date
Application number
CN201320286833XU
Other languages
Chinese (zh)
Inventor
田启忠
刘建新
张瑞霞
杨洁
王卫明
康寿兴
Original Assignee
中国石油化工股份有限公司
中国石油化工股份有限公司胜利油田分公司采油工艺研究院
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 中国石油化工股份有限公司, 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 filed Critical 中国石油化工股份有限公司
Priority to CN201320286833XU priority Critical patent/CN203308443U/en
Application granted granted Critical
Publication of CN203308443U publication Critical patent/CN203308443U/en

Links

Abstract

The utility model discloses a circulating gas injection pipe column. When the circulating gas injection pipe column is used in a gas injection well, the requirements for well control and replacement of oil jacket annular protection liquid at regular time are satisfied. The circulating gas injection pipe column comprises a sealing inserting tube; an anchor, a gas injection backwashing valve and the sealing inserting tube are connected with the lower end of the gas injection pipe column in sequence, and a circulating hole is formed in the gas injection backwashing valve. The circulating gas injection pipe column is provided with the gas injection backwashing valve, so that the requirement for well control is satisfied and the requirement for replacement of the oil jacket annular protection liquid at regular time is further satisfied; the oil pipe anchor on the upper portion of the pipe column can be cleaned and the phenomenon that flukes of the oil pipe anchor can not rebound due to the influence of dirt is avoided. Before the mouth of the well is detached, well control by the gas injection backwashing valve in a reversely circulating mode is achieved, the risk brought by detachment of the mouth of the well under the condition that well control can not be conducted in the prior art is avoided, and the use effect is obvious.

Description

A kind of gas injection tube column capable of circulation
Technical field
The utility model relates to the underground gas injection pipe column of petroleum industry producing well, and particularly a kind of gas injection tube column capable of circulation, can meet the needs that kill-job and regular replaced oil overlap annular protective liquid.
Background technology
For improving oil recovery rate, supplement stratum energy, a lot of low-permeability oil deposits have carried out the gas drive exploitation, in oil field, arrange some gas injection wells, use gas injection tube column to carry out gas injection production.The applying date is on December 24th, 2005, open day is on June 28th, 2006, the patent No. is 200510104618.3, disclose a kind of releasing type gas injection tube column, this tubing string is comprised of seating nipple, sealing plug, the tie-back sleeve of giving up, dish plate safety valve, packer, level pressure ball valve, screen casing and plug from top to bottom.The operation process of this tubing string is first to be lowered to the gas injection Back-off Pipe String, sets the gas injection tube column that is lowered to again top after giving up, and sealing plug inserts in the tie-back sleeve of giving up and carries out the gas injection operation.There is following technical problem in this cover gas injection tube column: The carbon dioxide, air or the impure gases such as the hydrocarbon gas that inject have corrosivity, need in the oil jacket annular space, inject protection liquid with the protection tubing and casing, and need regularly replacement to protect liquid, yet this gas injection tube column packer is above without anti-circulation canal, thereby can not carries out anti-circulation and replace protection liquid; If dish plate safety valve goes wrong while needing kill-job to play flowline, due to without the anti-flushing well passage, this gas injection tube column can not carry out kill job, because can not kill-job, there be operating risk in the dismounting well head.The gas injection valve that simultaneously long-term gas injection is produced in down-hole, if there is the situation such as corrosion or fouling and being not closed completely, can't find that on ground oil pressure is abnormal.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of gas injection tube column capable of circulation, is a kind of underground gas injection pipe column that can carry out anti-circulation well cleanup and have the grappling function, meets the needs of kill-job and regular replaced oil cover annular protective liquid.
Technical solution of the present utility model is: a kind of gas injection tube column capable of circulation comprises the sealing intubate; anchor, gas injection backwash valve and sealing intubate are connected to the lower end of gas injection tube column in turn; the gas injection backwash valve is provided with circulation port, can meet the needs of kill-job and replaced oil cover annular protective liquid.
Compared with prior art, the utility model has the advantage of: because the utility model has been installed the sealing intubate, make dish plate arranged at safety valve in open mode, the gas injection valve that long-term gas injection is produced in down-hole, if there is the situation such as corrosion or fouling and being not closed completely, just can find that on ground oil pressure is abnormal.Before tearing well head open, can use the anti-kill-job that circulates of gas injection backwash valve, prevent former technology in the situation that can not kill-job dismantle the risk that well head brings.The needs that the gas injection backwash valve has not only met kill-job are installed, are also met the needs of regular replaced oil cover annular protective liquid; Can produce cleaning action to the oil tube anchor device on tubing string top, prevent that the anchor fluke of oil tube anchor device can't be rebounded by the impact of foul, have obvious result of use and economic benefit.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model gas injection backwash valve.
Fig. 3 is the structural representation of the utility model sealing intubate.
The specific embodiment
Below in conjunction with accompanying drawing in detail the utility model is described in detail, referring to accompanying drawing, a kind of gas injection tube column capable of circulation comprises the sealing intubate, and anchor 1, gas injection backwash valve 2 and sealing intubate 3 are connected to the lower end of gas injection tube column in turn, and gas injection backwash valve 2 is provided with circulation port 11.Gas injection backwash valve 2 comprises top connection 4, central tube 6 and sleeve 7, and circulation port 11 is located on sleeve 7, and central tube 6 all is connected with top connection 4 with sleeve 7, and spring 5 and piston 10 are housed in the annular space between central tube 6 and sleeve 7.The bottom inner circle of sleeve 7 and the bottom cylindrical of piston 10 are provided with the step cooperatively interacted, and circulation port 11 is located at the cooperation place of sleeve 7 and piston 10 steps, and piston 10 is fixed on sleeve 7 by shear pin 9, is provided with sealing ring 8 at the two ends of its step cooperation place.Top connection 4 and sleeve 7 are equipped with tubing thread, are convenient to connect.Sealing intubate 3 comprises sealed tube 12 and intubate 13, and sealed tube 12 bottom cylindricals are provided with combined seal ring, and intubate 13 lower ends are provided with key groove, sealed tube 12 and intubate 13 screwed connections.The angle initialization of intubate 13 lower end key grooves, between 40 °-50 °, plays seeker.
While going into the well, first the gas injection Back-off Pipe String is lowered to design attitude, comprises gas injection flap valve, dish plate safety valve, packer, releasing tool, suppress base sealed packer after the gas injection Back-off Pipe String puts in place, open the gas injection passage.Pitching is given up, and the tubing string of giving up below tie-back sleeve is stayed in well, closes simultaneously dish plate safety valve.During gas injection, be lowered to the utility model, 12 of sealed tubes are sealed to the tie-back sleeve of giving up by the combination sealing mode in the tie-back sleeve of giving up, the safe dish of dish plate that while intubate 13 is passed packer insertion bottom opens it, tubing string is communicated with up and down, implements intermittently or the continuous gas injection operation.
When gas injection was produced, the pressure of oil pipe inside produced downward active force on the pressure reduction face of piston 10, and simultaneously, the oil pipe internal pressure makes the anchor fluke of anchor 1 stretch out to be anchored on sleeve pipe the utility model is fixed.Now gas injection backwash valve 2 keeps gas tightness, implements normal gas injection operation.When needs are replaced annular protective liquid or are needed kill job; to annular space, replace into protection liquid; when annular pressure reaches certain value; on the pressure reduction stress surface of piston 10, produce active force upwards; cut off shear pin 9 and Compress Spring 5 is up; thereby expose the circulation port 11 on sleeve 7, set up anti-circulation canal, can implement instead for operation.Anti-for protection liquid, finish after, piston 10 is about to circulation port 11 under under the thrust of spring 5 and is closed, and can again by oil pipe, carry out the gas injection operation.When needs are changed gas injection tube column, tubing pressure is released, the anchor fluke of anchor 1 rebounds, the upper lifting pipe post, intubate 13 is extracted in dish plate safety valve, can close dish plate safety valve the following space of seal pack device, realizes the operation of non-well killing change tubing string.

Claims (6)

1. a gas injection tube column capable of circulation, comprise the sealing intubate, it is characterized in that, anchor (1), gas injection backwash valve (2) and sealing intubate (3) are connected to the lower end of gas injection tube column in turn, and gas injection backwash valve (2) is provided with circulation port (11).
2. a kind of gas injection tube column capable of circulation according to claim 1, it is characterized in that, described gas injection backwash valve (2) comprises top connection (4), central tube (6) and sleeve (7), circulation port (11) is located on sleeve (7), central tube (6) all is connected with top connection (4) with sleeve (7), and spring (5) and piston (10) are housed in the annular space between central tube (6) and sleeve (7).
3. a kind of gas injection tube column capable of circulation according to claim 2, is characterized in that, the bottom cylindrical of the bottom inner circle of described sleeve (7) and piston (10) is provided with the step cooperatively interacted, circulation port ( 11)Be located at the cooperation place of sleeve (7) and piston (10) step, it is upper that piston (10) is fixed on sleeve (7) by shear pin (9), at the two ends of its step cooperation place, is provided with sealing ring (8).
4. according to the described a kind of gas injection tube column capable of circulation of claim 2 or 3, it is characterized in that, described top connection (4) and sleeve (7) are equipped with tubing thread.
5. a kind of gas injection tube column capable of circulation according to claim 1, it is characterized in that, described sealing intubate (3) comprises sealed tube (12) and intubate (13), sealed tube (12) bottom cylindrical is provided with combined seal ring, intubate (13) lower end is provided with key groove, sealed tube (12) and intubate (13) screwed connection.
6. a kind of gas injection tube column capable of circulation according to claim 5, is characterized in that, the angle initialization of described intubate (13) lower end key groove is between 40 °-50 °.
CN201320286833XU 2013-05-24 2013-05-24 Circulating gas injection pipe column CN203308443U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320286833XU CN203308443U (en) 2013-05-24 2013-05-24 Circulating gas injection pipe column

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320286833XU CN203308443U (en) 2013-05-24 2013-05-24 Circulating gas injection pipe column

Publications (1)

Publication Number Publication Date
CN203308443U true CN203308443U (en) 2013-11-27

Family

ID=49614659

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320286833XU CN203308443U (en) 2013-05-24 2013-05-24 Circulating gas injection pipe column

Country Status (1)

Country Link
CN (1) CN203308443U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499371A (en) * 2015-09-06 2017-03-15 中国石油天然气股份有限公司 A kind of standing column well gas injection improves the method and device of Condensate Gas Reservoir recovery ratio
CN107178347A (en) * 2017-07-03 2017-09-19 中国石油天然气股份有限公司 A kind of long-acting CO2Gas injection tube column and operating method
CN107178335A (en) * 2017-07-03 2017-09-19 中国石油天然气股份有限公司 A kind of multi-functional setting ball seat and its application method
CN107605443A (en) * 2017-09-12 2018-01-19 中国石油天然气股份有限公司 A kind of CO2Drive gas injection technology tubular column structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499371A (en) * 2015-09-06 2017-03-15 中国石油天然气股份有限公司 A kind of standing column well gas injection improves the method and device of Condensate Gas Reservoir recovery ratio
CN107178347A (en) * 2017-07-03 2017-09-19 中国石油天然气股份有限公司 A kind of long-acting CO2Gas injection tube column and operating method
CN107178335A (en) * 2017-07-03 2017-09-19 中国石油天然气股份有限公司 A kind of multi-functional setting ball seat and its application method
CN107178347B (en) * 2017-07-03 2019-12-06 中国石油天然气股份有限公司 long-acting CO2 gas injection pipe column and operation method
CN107178335B (en) * 2017-07-03 2019-12-06 中国石油天然气股份有限公司 Multifunctional setting ball seat and use method thereof
CN107605443A (en) * 2017-09-12 2018-01-19 中国石油天然气股份有限公司 A kind of CO2Drive gas injection technology tubular column structure

Similar Documents

Publication Publication Date Title
US7954551B2 (en) System and method for thru tubing deepening of gas lift
CN201714364U (en) Tubular column for horizontal well barefoot well completion staged fracturing acidizing tool
CN103015955B (en) Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof
CN202544824U (en) Concentric double-pipe hierarchical injection pipe column
CN103806934A (en) High-stress low-porosity coal bed presplitting permeability-increase methane drainage system and method
CN102071900B (en) Custom-pressure expandable naked eye packer
CN201212387Y (en) Gas injection, gas production and brine discharge integration process pipe column for underground gas storage
US7069987B2 (en) Casing adapter tool for well servicing
CN102979495B (en) Many bunches of Limited entry fracturing tubing strings of open-hole horizontal well and fracturing process thereof
CN104695927B (en) A kind of coiled tubing and production tube compound tube string pressure break and completion integral method
CN204419141U (en) A kind of selective sand control is surveyed and is adjusted one separate layer water injection string
CN102434135B (en) Multi-layer discharge and mining device for multiple seam developed area
CN202338315U (en) Casing sliding sleeve capable of reducing diameter
CN108678671B (en) A kind of sea bed gas hydrate digging sleeve type injection recyclable device
CN103306643A (en) Drainage gas recovery device and method
CN102383760A (en) Design method of sliding sleeve switch
CN205172507U (en) Natural gas is annotated, is adopted well cable logging high pressure and prevents system of spouting
CN203756146U (en) Sleeve protecting setting water injection integrated pipe column
RU2509873C1 (en) Sealing method of production string
CN101929317B (en) Undersize-hole oil pipe plugging device
CN102561991B (en) Small-diameter hydrostatic setting plug
CN201439701U (en) Stage cementing distributor
CN106761498B (en) A kind of experimental provision and method for gas hydrates drilling fluid progress multi-phase separation
CN204738799U (en) Double -barrelled water injection tubular column in pit
CN106050199B (en) Comprehensive drainage gas production device and method

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131127

Termination date: 20170524

CF01 Termination of patent right due to non-payment of annual fee