CN101684724B - Snubbing downhole control valve - Google Patents
Snubbing downhole control valve Download PDFInfo
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- CN101684724B CN101684724B CN200810223455A CN200810223455A CN101684724B CN 101684724 B CN101684724 B CN 101684724B CN 200810223455 A CN200810223455 A CN 200810223455A CN 200810223455 A CN200810223455 A CN 200810223455A CN 101684724 B CN101684724 B CN 101684724B
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Abstract
The invention relates to a snubbing downhole control valve, which aims to overcome the defects that a switch of the control valve is required to be controlled by the up and down motion of an oil string, the operation of descending the string is complex and the parting of a sucker rod can cause the loss of control of the control valve existing in the prior downhole control valve. A movable pipe string (24) is arranged a fixed pipe string (25); the movable pipe string (24) is sequentially provided with an upper single-flow valve (22), a connecting sleeve (7), a lower single-flow valve (23) and a spring seat (14) from top to bottom; an upper single-flow valve body (1), the connecting sleeve (7), a lower single-flow valve body (10) and the spring seat (14) are sequentially and fixedly connected from top to bottom; and the fixed pipe string (25) is provided with a pressure cap (2), a sealing shell (6), an outer cylinder (15) and a lower connector (16) from top to bottom, which are fixedly connected sequentially. The snubbing downhole control valve has the advantage of reasonable structure, has good functions of opening and closing, and can complete the mutual conversion of the oil well operation and the oil pumping production by using one string.
Description
Affiliated technical field
The present invention relates to a kind of oil and gas development oil recovery, underground work instrument, especially relate to a kind of Snubbing downhole control valve.
Background technology
In the oil exploitation operation, the oil well that strata pressure is high has certain blowing ability, usually need adopt the mud of certain weight proportion or clear water to carry out kill-job in the operation; Kill job sometimes because of the construction or design improper; Cause oil layer pollution, stop up effecive porosity and reduce seepage area, reduce the rate when producing of recovering the oil; Reduce oil well output, increase operating cost.For fear of the injury to oil reservoir, construction operation often adopts down-hole switch to substitute kill job, and down-hole switch is installed between oil well pump and the standing valve, relies on pumping of sucker rod to control opening or closing of down-hole switch fluid course.But because down-hole switch is installed between oil well pump and the standing valve, make oil well pump clearance volume increase in process of production, influence the oil well pump sealing, reduce pump efficiency; Down-hole switch relies on sucker rod to pump and controls the opening and closing of fluid course, in case rod parting, down-hole switch just is in runaway condition.
On January 1st, 2003 disclosed " downhole control valve " (CN2528929Y); Comprise box cupling, outer cover, spring, ball seat, ball valve, seal; And be installed in the tooth bar between outer cover and the ball seat and be installed in the gear shaft on the valve ball, through the engagement of gear shaft and tooth bar, drive valve ball and rotate the passage that opens or closes oil reservoir and stratum; Can carry out enclosed oil recovery, snubbing serving, have blowout prevention, drip-preventing function.On February 14th, 2007 disclosed " a kind of downhole control valve " (CN2869305Y); The control sliding sleeve is housed in the upper valve base, and the control sliding sleeve is equipped with spring outward, in the cavity between upper valve base and the lower valve base hollow float is housed; Lost circulation polluted the stratum when this device promptly can effectively prevent the rod-pumped well well-flushing; Guarantee ordinary production, can play the blowout prevention effect again, realize snubbing serving.On April 14th, 2004 disclosed " a kind of anti-pollution one way valve that is used for offshore oilfield " (CN2611585Y); Form by interior pipe, cluster spring, one way valve and control valve; The production of centralized procurement oil, well-flushing, acidifying measure are implemented three functions in one, effectively prevent to pollute the stratum in the flushing fluid intrusion well.
Though above-mentioned three technology can not trip out tubing string and accomplish recover the oil production, not kill-job workover treatment, has blowout prevention, drip-preventing function, they are in the tool construction complicacy or be difficult for carrying out control operation; Like " downhole control valve " (CN2528929Y); Be the engagement through gear shaft and tooth bar, the drive valve ball rotates and opens or closes passage, if the strength that driven gear rotates is not enough; Make the engagement of gear shaft and tooth bar not in place, just be difficult to the Push And Release of switchover control valve; " a kind of downhole control valve " (CN2869305Y), instrument is lowered to and the production of pumping needs twice tubing string could realize, control valve is and packer, the first G.I.H of first time tubing string of composition of giving up; Behind the set packer control valve, packer are lost in the down-hole; Trip out the above tubing string of head of giving up, and then be lowered to the oil pumping flow string, the tubing string bottom has insertion tube; Be inserted into functions such as forming downhole production tubing string, realization oil pumping, well-flushing in the control valve through the head of giving up; " a kind of anti-pollution one way valve that is used for offshore oilfield " (CN2611585Y) be equally under the down-hole twice tubing string could realize that production, well-flushing, acidifying measure implements three functions in the effect of one, be not easy to execute-in-place.
Summary of the invention
For relying on moving up and down of tubing string, the needs that overcome existing downhole control valve existence control the switch of control valve; Be not easy to operation, rod parting causes control valve deficiency out of control, and the present invention provides a kind of Snubbing downhole control valve; This Snubbing downhole control valve unites two into one the effect of oil well pump bottom valve and down-hole switch; Need not change the oil well pump structure, a running string, through on propose or transfer the opening and closing that tubing string just can be controlled the down-hole fluid course; One-trip string has blowout prevention, well-flushing, production, oil draining function, has avoided taking place because of rod parting causes the control valve out-of-control phenomenon.
The technical solution adopted for the present invention to solve the technical problems is: the mobile pipe string of Snubbing downhole control valve is installed in the stationary pipes string.Move the pipe string and be followed successively by ball-and-seat, adapter sleeve, following ball-and-seat, spring base from top to bottom; Last ball-and-seat valve body, adapter sleeve, following single current valve body, spring base from top to bottom are fixedly connected sequentially; The last ball-and-seat valve body middle part ring of blocking, blocking to encircle has axial flowing hole; Be installed with the ball-and-seat valve seat between last ball-and-seat valve body and the adapter sleeve, upper valve ball is being blocked between ring and the last ball-and-seat valve seat; Be installed with down the single current valve base between adapter sleeve and the following single current valve body, lower valve ball is positioned at single current valve base below down; Check ring and spring are installed between lower valve ball and the spring base.The stationary pipes string is fixedly connected sequentially by pressure cap, seal casinghousing, urceolus, lower contact from top to bottom; Pressure cap internal diameter in the stationary pipes string, seal casinghousing bottom boss internal diameter be less than other position, and be sealed and matched for radially sliding respectively and between the last ball-and-seat valve body, adapter sleeve, and 2 positions that are sealed and matched are the overcurrent chamber between axially; Be positioned at last positioning step and following positioning step are arranged on the mobile pipe string excircle in overcurrent chamber; Between the last positioning step of mobile pipe string and the following positioning step radially flowing hole I is arranged, there is radially flowing hole II the below of following positioning step.When last positioning step contacted with the pressure cap lower surface, flowing hole I and flowing hole II were communicated with the overcurrent chamber; When following positioning step contacted with seal casinghousing endoporus boss upper surface, flowing hole I was communicated with the overcurrent chamber, and flowing hole II is communicated with outer tube inner chamber.
The invention has the beneficial effects as follows; Rational in infrastructure; Good unlatching, closing function can satisfy the multinomial needs of oil pumping, draining in blowout prevention, well-flushing and the oil pumping production of oil well when operation; Utilize one-trip string (but fixed tubular column) to accomplish the mutual conversion of oil well operation and oil pumping production, save subsidiary operation time, increase work efficiency.
Description of drawings
Fig. 1 is a Snubbing downhole control valve structural representation of the present invention.
Fig. 2 is a next sketch map of Snubbing downhole control valve of the present invention.
Fig. 3 is the A-A sectional drawing of Fig. 1.
Among the figure: 1. go up the ball-and-seat valve body, 2. pressure cap, 3. sealing ring, 4. sealing ring, 5. flowing hole I, 6. seal casinghousing; 7. adapter sleeve, 8. flowing hole II, 9. sealing ring 10. descends the single current valve body, 11. outer tube inner chambers, 12. check rings; 13. spring, 14. spring bases, 15. urceolus, 16. lower contacts, 17. axial flowing holes, 18. upper valve balls; 19. last ball-and-seat valve seat, 20. times single current valve bases, 21. lower valve balls, ball-and-seat on 22., 23. times ball-and-seats, 24. move the pipe string; 25. the stationary pipes string, 26. overcurrent chambeies, positioning step on 27., 28. times positioning steps, 29. rings of blocking.
The specific embodiment
The present invention is described further with embodiment below in conjunction with accompanying drawing 1～accompanying drawing 3.
Snubbing downhole control valve of the present invention mainly comprises and moves pipe string 24 and stationary pipes string 25, moves pipe string 24 and is positioned at stationary pipes string 25, and can endwisely slip along stationary pipes string 25.
Move pipe string 24 and be followed successively by ball-and-seat 22, adapter sleeve 7, following ball-and-seat 23, spring base 14 from top to bottom.Last ball-and-seat valve body 1, adapter sleeve 7, single current valve body 10, spring base 14 from top to bottom are fixedly connected sequentially down.Blocking and encircle 29 in last ball-and-seat valve body 1 middle part, on the ring 29 of blocking axial flowing hole 17 is arranged; Be installed with ball-and-seat valve seat 19 between last ball-and-seat valve body 1 and the adapter sleeve 7, upper valve ball 18 is being blocked between ring 29 and the last ball-and-seat valve seat 19.Be installed with down single current valve base 20 between adapter sleeve 7 and the following single current valve body 10, lower valve ball 21 is positioned at single current valve base 20 belows down; Check ring 12 and spring 13 are installed between lower valve ball 21 and the spring base 14.
Pressure cap 2 internal diameters, seal casinghousing 6 bottom boss internal diameters are less than other positions in stationary pipes string 25 endoporus, and respectively and move between the pipe string 24 and be sealed and matched for radially sliding; Usually pressure cap 2 cooperates with last ball-and-seat valve body 1, and seal casinghousing 6 cooperates with adapter sleeve 7.Between pressure cap 2 endoporus and last ball-and-seat valve body 1 cylindrical sealing ring 4 is installed radially; Between seal casinghousing 6 bottom endoporus and adapter sleeve 7 cylindricals sealing ring 9 is installed radially.Be annular overcurrent chamber 26 between above-mentioned 2 positions that are sealed and matched are axial,, contact end face axial at pressure cap 2 with seal casinghousing 6 sealing ring 3 is installed in order to guarantee sealing effectiveness.
The mobile pipe that is positioned at overcurrent chamber 26 is gone here and there has last positioning step 27 and following positioning step 28 on 24 excircles, goes up positioning step 27 usually and is positioned on the ball-and-seat valve body 1, and following positioning step 28 is positioned on the adapter sleeve 7.Between positioning step 27 and the following positioning step 28 radially flowing hole I5 being arranged on the mobile pipe string 24, below following positioning step 28, radially flowing hole II8 is arranged; Usually radially flowing hole I5 is positioned on the ball-and-seat valve body 1, and radially flowing hole II8 is positioned on the adapter sleeve 7.Radially flowing hole has several, and along moving pipe string 24 circumference uniform distributions.
Snubbing downhole control valve of the present invention when moving pipe string 24 when stationary pipes string 25 endwisely slips, is controlled through last positioning step 27 and following positioning step 28 and to be moved pipe and go here and there 24 moving range.When last positioning step 27 contacts with pressure cap 2 lower surfaces, move pipe string 24 and be in upper (see figure 1), flowing hole I5, flowing hole II8 are communicated with overcurrent chamber 26; When moving pipe string 24 and slide down to down positioning step 28 and contact with seal casinghousing 6 endoporus boss upper surfaces, mobile manage to go here and there 24 be in the next (see figure 2), flowing hole I5 is communicated with overcurrent chamber 26, flowing hole II8 is communicated with outer tube inner chamber 11.
The implementation process of Snubbing downhole control valve of the present invention, at first the lower contact 16 with the Snubbing downhole control valve lower end of assembled is fixedly connected with oil pipe; The last ball-and-seat valve body 1 of upper end is fixedly connected with the following box cupling of oil well pump, forms flow string, then with in the tubing string lower going-into-well.When tubing string was gone into the well, Snubbing downhole control valve was in free state, and promptly mobile pipe string 24 is in upper, and following ball-and-seat 23 is in closed condition, seals outer tube inner chamber 11, stops on the down-hole high pressure flow to scurry (see figure 1).
Transfer to projected depth when tubing string, tubing string sets pump lower packet or anchor.Continue to transfer tubing string; Stationary pipes string 25 no longer moves down, and it is descending until being in the next state, at this moment to move pipe string 24; The flowing hole II8 that moves on the pipe string 24 is communicated with outer tube inner chamber 11, and liquid can be through between ball-and-seat 22 in the flowing hole II8 entering and the following ball-and-seat 23 under the pump; Open oil well pump, liquid will back down ball-and-seat 22 and get into oil well pump, the production operation (see figure 2) of pumping in the well.
When carrying out the lift pipe string operation, on carry oil pipe drive to move pipe string 24 up, go upward to and move pipe string 24 and be in when upper, form heavily again between seal casinghousing 6 and the adapter sleeve 7 and seal, prevention down-hole high pressure liquid rushes at well head; And the liquid process moves flowing hole I5, overcurrent chamber 26, flowing hole II8 on the pipe string 24 on the pump; Act on the lower valve ball 21, lower valve ball 21 compression springs 13 will descend ball-and-seat 23 to open; Liquid flows in the pit shaft through following ball-and-seat 23 on the pump, has avoided well liquid to take the ground pollution environment to oil pipe.
Adopt Snubbing downhole control valve of the present invention, be in when upper, have blowout prevention and oil draining function when moving pipe string 24; Be in when the next when moving pipe string 24, can pump or the anti-flushing well operation.Snubbing downhole control valve of the present invention need not change the oil well pump structure, does not influence pump efficiency; Function reasonable in design, simple in structure, as not only to have out and close, and the various functions of collection oil well pump bottom valve and down-hole switch are one, have both solved not kill-job of oil well and have played the blowout prevention problem in the lower tubular column operation, have the function of well-flushing and draining; The keying of fluid course under the put-on and delegated control well of dependence tubing string utilizes one-trip string can accomplish the mutual conversion of oil well operation and oil pumping production, simplifies operation procedure greatly, reduces subsidiary operation time, increases work efficiency.
Claims (3)
1. a Snubbing downhole control valve comprises ball-and-seat, spring, spring base, lower contact, urceolus, it is characterized in that: move pipe string (24) and be installed in the stationary pipes string (25);
Move pipe string (24) and be followed successively by ball-and-seat (22), adapter sleeve (7), following ball-and-seat (23), spring base (14) from top to bottom; Last ball-and-seat valve body (1), adapter sleeve (7), following single current valve body (10), spring base (14) from top to bottom are fixedly connected sequentially; Last ball-and-seat valve body (1) the middle part ring (29) of blocking has axial flowing hole (17) on the ring (29) of blocking; Be installed with ball-and-seat valve seat (19) between last ball-and-seat valve body (1) and the adapter sleeve (7), upper valve ball (18) is positioned at blocks between ring (29) and the last ball-and-seat valve seat (19); Be installed with down single current valve base (20) between adapter sleeve (7) and the following single current valve body (10), lower valve ball (21) is positioned at single current valve base (20) below down; Check ring (12) and spring (13) are installed between lower valve ball (21) and the spring base (14);
Stationary pipes string (25) is fixedly connected sequentially by pressure cap (2), seal casinghousing (6), urceolus (15), lower contact (16) from top to bottom;
Pressure cap (2) internal diameter in stationary pipes string (25) endoporus, seal casinghousing (6) bottom boss internal diameter are less than other position internal diameter size of stationary pipes string (25); And pressure cap (2) endoporus, seal casinghousing (6) bottom boss endoporus respectively and last ball-and-seat valve body (1), adapter sleeve be sealed and matched for radially sliding between (7), 2 positions that are sealed and matched are overcurrent chamber (26) between axially; Be positioned on mobile pipe string (24) excircle in overcurrent chamber (26) last positioning step (27) and following positioning step (28) are arranged;
Between the last positioning step (27) of mobile pipe string (24) and the following positioning step (28) radially flowing hole I (5) are arranged, the below of following positioning step (28) has radially flowing hole II (8).
2. Snubbing downhole control valve according to claim 1 is characterized in that: said positioning step (27) and the pressure cap (2) gone up is when the lower surface contacts, and flowing hole I (5) and flowing hole II (8) are communicated with overcurrent chamber (26); When positioning step (28) contacted with seal casinghousing (6) endoporus boss upper surface under said, flowing hole I (5) was communicated with overcurrent chamber (26), and flowing hole II (8) is communicated with outer tube inner chamber (11).
3. Snubbing downhole control valve according to claim 2 is characterized in that: between pressure cap (2) endoporus in the said stationary pipes string (25) and last ball-and-seat valve body (1) cylindrical sealing ring (4) is installed radially; Said pressure cap (2) contacts end face axial with seal casinghousing (6) sealing ring (3) is installed; Between said seal casinghousing (6) bottom endoporus and adapter sleeve (7) cylindrical sealing ring (9) is installed radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810223455A CN101684724B (en) | 2008-09-27 | 2008-09-27 | Snubbing downhole control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810223455A CN101684724B (en) | 2008-09-27 | 2008-09-27 | Snubbing downhole control valve |
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| Publication Number | Publication Date |
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| CN101684724A CN101684724A (en) | 2010-03-31 |
| CN101684724B true CN101684724B (en) | 2012-10-17 |
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| CN200810223455A Active CN101684724B (en) | 2008-09-27 | 2008-09-27 | Snubbing downhole control valve |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061707B (en) * | 2011-10-21 | 2015-07-22 | 中国石油天然气股份有限公司 | Cycling switch valve under well |
| CN102536183B (en) * | 2012-01-31 | 2014-11-12 | 中国石油化工股份有限公司 | Underground gas injection pipe column |
| CN103939052B (en) * | 2014-05-28 | 2016-01-13 | 西南石油大学 | A kind of fluid pressure type no killing well down-hole switch |
| CN104879087B (en) * | 2015-06-04 | 2017-09-15 | 中国石油天然气股份有限公司 | Blanking plug |
| CN106703759A (en) * | 2015-11-18 | 2017-05-24 | 克拉玛依胜利高原机械有限公司 | Device and method of snubbing oil pumping operation overhaul sealing oil flow |
| CN105545221B (en) * | 2016-03-04 | 2017-11-24 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of shale gas well no killing well is not with pressure to remove flow string and construction method |
| CN107165606B (en) * | 2017-06-26 | 2023-07-21 | 中国石油天然气集团有限公司 | High-pressure negative-pressure separate mining device on upper layer |
| CN112627771A (en) * | 2020-12-11 | 2021-04-09 | 中国石油集团渤海钻探工程有限公司 | Mechanical three-way switch circulating sliding sleeve |
| CN114837614B (en) * | 2022-05-30 | 2023-11-03 | 东北石油大学 | Pressure control valve in underground oil pipe string |
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| CN101684724A (en) | 2010-03-31 |
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Effective date of registration: 20201124 Address after: 300000 No. three, Dagang Oilfield, Binhai New Area, Tianjin Patentee after: DAGANG OILFIELD GROUP Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee before: DAGANG OILFIELD GROUP Co.,Ltd. |