CN203308443U - Circulating gas injection pipe column - Google Patents
Circulating gas injection pipe column Download PDFInfo
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 63
- 239000007924 injections Substances 0.000 title claims abstract description 63
- 239000007789 gases Substances 0.000 title description 47
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 12
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000011001 backwashing Methods 0.000 abstract 4
- 241000242541 Trematoda Species 0.000 abstract 1
- 230000001681 protective Effects 0.000 description 5
- 241000935974 Paralichthys dentatus Species 0.000 description 3
- 108060002965 flK Proteins 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 210000002445 Nipples Anatomy 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound 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O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005500 petroleum industry Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
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 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320286833XU CN203308443U (en) | 2013-05-24 | 2013-05-24 | Circulating gas injection pipe column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320286833XU CN203308443U (en) | 2013-05-24 | 2013-05-24 | Circulating gas injection pipe column |
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| CN203308443U true CN203308443U (en) | 2013-11-27 |
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| CN201320286833XU CN203308443U (en) | 2013-05-24 | 2013-05-24 | Circulating gas injection pipe column |
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Cited By (4)
| 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 |
-
2013
- 2013-05-24 CN CN201320286833XU patent/CN203308443U/en not_active IP Right Cessation
Cited By (6)
| 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 |
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