CN103541700A - Reverse seal type eccentric water distributor - Google Patents
Reverse seal type eccentric water distributor Download PDFInfo
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- CN103541700A CN103541700A CN201310493328.7A CN201310493328A CN103541700A CN 103541700 A CN103541700 A CN 103541700A CN 201310493328 A CN201310493328 A CN 201310493328A CN 103541700 A CN103541700 A CN 103541700A
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Abstract
A reverse seal type eccentric water distributor is characterized in that an upper connector is connected with an upper connecting sleeve in a threaded manner, the lower end of a centralizing body is connected with a body through screws and placed into the upper connecting sleeve, the upper end of the body is connected with the upper connecting sleeve in a threaded manner, the lower end of the body is connected with a guide body through screws and placed into a lower connector, the lower end of the body is connected with the lower connector in a threaded manner through a lower connecting sleeve, a first eccentric hole and a second eccentric hole are axially formed along the periphery of body, a downhole fluid reverse seal mechanism is mounted on the body, and a slide valve type pressure measuring mechanism is mounted in the second eccentric hole. The reverse seal type eccentric water distributor has the advantages that when a water injection well is shut down or stops injection, the reverse seal mechanism operates to stop liquid of high-pressure layers from flow backwards to the low-pressure layers, pressure measuring and layered water injection string seal examining after reverse seal can be achieved by the slide valve type pressure measuring mechanism, well washing fluid distribution, causing unthorough well washing, of on the water distributor during reverse well washing is avoided, and the reverse seal type eccentric water distributor is good in process succession and convenient in field application.
Description
Technical field
The present invention relates to a kind of oil extraction in oil field technique layered water injection tool, specifically a kind of eccentric injection mandrel with reverse sealing function.
Background technology
Water drive is still the main displacement technology of Oilfield using at present, and seperated layer water injection is one of important means in oilfield development process.At present, a lot of oil fields all adopt eccentric stratified injection water technology, and existing eccentric injection mandrel does not have the oppositely function of sealing, when closing well or while stopping noting, the liquid of high pressure zone can pour in down a chimney to low pressure layer by eccentric injection mandrel, and reservoir sand and foul are carried and entered in oil pipe, affected the effect of seperated layer water injection.When water injection well needs well-flushing, flushing fluid can enter in oil pipe on eccentric injection mandrel, thereby produces the shunting midway of flushing fluid, causes the halfway problem of well-flushing.
In addition, prior art is sealing pressure measuring mechanism not oppositely, can not realize the envelope of testing of pressure measurement after reverse sealing and separate layer water injection string.
Summary of the invention
The object of this invention is to provide a kind of eccentric injection mandrel with reverse sealing function, solve the reverse sealing problem of separated-zone water infection oil field well eccentric injection mandrel, designed the envelope problem of testing that side valve type pressure measuring mechanism has solved pressure measurement and separate layer water injection string after reverse sealing simultaneously, for oil field, further improve seperated layer water injection effect, technical support is provided.
Technical scheme of the present invention is achieved in the following ways: a kind of eccentric injection mandrel with reverse sealing function, comprise that top connection, upper joint sleeve, centralizer body, main body, guide way, lower joint sleeve and lower contact form, top connection is threaded with upper joint sleeve, after being connected by screw, centralizer body lower end and main body insert in upper joint sleeve, main body upper end is threaded with upper joint sleeve, after main body lower end and guide way are connected by screw, insert in lower contact, main body lower end is threaded with lower contact by lower joint sleeve; In main body, along circumference, be provided with the first axial inclined to one side hole and the second inclined to one side hole, it is characterized in that, the reverse sealing mechanism of downhole fluid is housed in described main body, in the second described inclined to one side hole, side valve type pressure measuring mechanism is housed.
The reverse sealing mechanism of described downhole fluid comprises first half of the month ring, the second half of the month ring and rubber tube, and first half of the month, ring encircled upper and lower coaxial sleeve in the respective slot of described main body outer peripheral face with the second half of the month, on the second half of the month ring, is provided with liquid pass hole radially; Rubber tube covers the periphery that encircle first half of the month and the second half of the month is encircled; Corresponding to first half of the month ring with the first place, inclined to one side hole, be provided with semi-moon shaped upper channel, this upper channel and the first inclined to one side hole are crossing; On the outer peripheral face of the main body corresponding to the second half of the month ring and be respectively equipped with the lower channel of one and a half months shape corresponding to the both sides of upper channel.
Described side valve type pressure measuring mechanism comprises bolt top cover, piston, spring and spring stack, the bottom of spring stack is threaded connection in the second lower end, inclined to one side hole, pocketed springs on spring stack, piston is installed on top at this spring, on the top of this piston, with bolt top cover, is connected with the top in the second inclined to one side hole; In the axle center of piston, be provided with the centre bore that runs through bottom, at the outer peripheral face of piston, be provided with three seals ring, be respectively equipped with upper and lower annular groove between adjacent joint ring, on this, annular groove communicates with centre bore; Between the second inclined to one side hole of the above and below corresponding to piston and the centre bore of described main body, be respectively equipped with He Xia hole, hole; On the top in the second inclined to one side hole, be provided with the accessibke porosity with described main body exterior.
Lower, outer perimeter face at described spring stack is provided with joint ring.
The invention has the beneficial effects as follows: the one, when water injection well closing well or while stopping noting, oppositely sealing mechanism work, stop the liquid of high pressure zone to pour in down a chimney to low pressure layer by injection well downhole flow regulator, the 2nd, by side valve type pressure measuring mechanism, can realize the envelope of testing of pressure measurement after reverse sealing and separate layer water injection string.In the time of can solving anti-flushing well, flushing fluid is shunted the halfway problem of well-flushing that causes on injection well downhole flow regulator simultaneously.Using method and original eccentric injection mandrel are just the same, and technique inheritance is good, and on-the-spot application is convenient.
Accompanying drawing explanation
Fig. 1 is the axial sectional view (the C-C sectional view of Fig. 3) of general structure of the present invention;
Fig. 2 is the enlarged drawing of main part in Fig. 1;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 2;
Fig. 5 is the D-D sectional view (main part) of Fig. 4.
The specific embodiment
Referring to Fig. 1～Fig. 5, a kind of eccentric injection mandrel with reverse sealing function of the present invention, comprise that top connection 1, upper joint sleeve 2, centralizer body 3, main body 4, guide way 5, lower joint sleeve 9 and lower contact 6 form, top connection 1 is threaded with upper joint sleeve 2, after being connected by screw, centralizer body 3 lower ends and main body 4 insert in upper joint sleeve 2, main body 4 upper ends are threaded with upper joint sleeve 2, after main body 4 lower ends and guide way 5 are connected by screw, insert in lower contact 6, main body 4 lower ends are threaded with lower contact 6 by lower joint sleeve 9; In main body 4, along circumference, be provided with the first axial inclined to one side hole 86 and the second inclined to one side hole 87.Above-mentioned is the structure of existing eccentric injection mandrel, the present invention has carried out following improvement on the basis of existing eccentric injection mandrel: in a described main body 4(side adjacent with the first inclined to one side hole 86) the reverse sealing mechanism 8 of downhole fluid is housed, in the second described inclined to one side hole 87, side valve type pressure measuring mechanism 7 is housed.
Referring to Fig. 2, described side valve type pressure measuring mechanism 7 comprises bolt top cover 71, piston 72, spring 74 and spring stack 78, (its diameter is greater than other parts in the bottom of spring stack 78, be provided with external screw thread) be threaded connection in the lower end in the second inclined to one side hole 87, in the annular groove of the outer peripheral face of the bottom of spring stack 78 (above bottom is externally threaded), be provided with joint ring 781.On spring stack 78, pocketed springs 74, on the top of this spring 74, piston 72 are installed, and on the top of this piston 72, with bolt top cover 71, are connected with the top in the second inclined to one side hole 87.Only in the axle center of piston 72, be provided with the centre bore 73 that the bottom with piston 72 connects, outer peripheral face at piston 72 is provided with three seals ring 721, between adjacent joint ring 721, be respectively equipped with annular groove 722 and lower annular groove 723, on this, annular groove 722 communicates with centre bore 73.Between the second inclined to one side hole 87 of the above and below corresponding to piston 72 and the centre bore of described main body 4, be respectively equipped with 76He Xia hole, hole 77.On the top in the second inclined to one side hole 87, be provided with the accessibke porosity 75 with described main body 4 exterior.
When the present invention works, 76He Xia hole, upper hole 77 is oil pipe internal pressure, because the area of piston 72 top and bottom is equal, so transfixion under the elastic force effect of spring 74, now the pilot passage (be accessibke porosity 75 and upper hole 76He Xia hole 77 between) of piston 72 between main body 4 is inside and outside seals.In the time of in pressure-measuring sealing section acts on centre bore (73), (pressure-measuring sealing section is a kind of conventional instrument that downhole testing is used to pressure-measuring sealing section, it is the testing arrangement beyond this patent, its effect is mainly whether the packer of checking down-hole each layer sets) sealing cup by the pressure communication of cutting off in lower hole 77 and oil pipe, and upper hole 76 still remains tubing pressure, in formation, hole 76 pressure (tubing pressure) is greater than lower hole 77 pressure (casing pressure), make piston 72, the direction in hole 77 is slided downwards, when sliding into restriction position, centre bore 73 in piston 72 is communicated with accessibke porosity 75, thereby casing pressure is passed through to accessibke porosity 75, the centre bore 73 of piston 72 and lower hole 77 import and act in the pressure-measuring sealing section pressure gauge in main body 4, that realizes pressure measurement and separate layer water injection string tests envelope function.
Referring to Fig. 2 and Fig. 5, the reverse sealing mechanism 8 of described downhole fluid comprise encircle 82 first half of the month, the second half of the month ring 83, rubber tube 84, encircle first half of the month 82 with the second half of the month ring 83 Shang Xia coaxial sleeve in the respective slot of described main body 4 outer peripheral faces, in the second half of the month, encircle on 83 and be provided with liquid pass hole 831 radially; Rubber tube 84 covers and encircles 82 and the periphery of the second half of the month ring 83 first half of the month.Corresponding to encircling 82 and be provided with semi-moon shaped upper channel 81 with the outer peripheral face of the main body 4 at 86 places, the first inclined to one side hole first half of the month, intersect in this upper channel 81 and the first inclined to one side hole 86.On the outer peripheral face of the main body 4 corresponding to the second half of the month ring 83 and be respectively provided with the lower channel 88 of one and a half months shape corresponding to the both sides of upper channel 81.
Because the exhalant canal (upper channel 81) of main body 4 has been located rubber tube 84 parcels, so when carrying out pressure measurement with pressure-measuring sealing section or separate layer water injection string is tested to envelope, oil pipe external pressure cannot be transmitted in the pressure-measuring sealing section in oil pipe by exhalant canal.When injection allocation liquid enters inclined to one side hole from the bottom in the first inclined to one side hole 86, first enter upper channel 81, owing to being subject to encircling first half of the month 82 stop, injection allocation liquid continues to enter into lower channel 88, and encircle the liquid pass hole 831 on 83 by the second half of the month, finally under the promotion of pressure, below rubber tube 84, extrude and enter into stratum.
When underground work, once closing well or stop noting, strata pressure is greater than oil pipe internal pressure, rubber tube 84 oppositely seals exhalant canal (upper channel 81) under hydraulic action, make high pressure zone liquid enter oil pipe by exhalant canal, avoid reservoir sand and foul to pour in down a chimney in injection well downhole flow regulator and oil pipe, affect layering water distribution effect.
Claims (4)
1. an eccentric injection mandrel with reverse sealing function, comprise top connection (1), upper joint sleeve (2), centralizer body (3), main body (4), guide way (5), lower joint sleeve (9) and lower contact (6) form, top connection (1) is threaded with upper joint sleeve (2), after being connected by screw, centralizer body (3) lower end and main body (4) insert in upper joint sleeve (2), main body (4) upper end is threaded with upper joint sleeve (2), after being connected by screw, main body (4) lower end and guide way (5) insert in lower contact (6), main body (4) lower end is threaded with lower contact (6) by lower joint sleeve (9), in main body (4), above along circumference, be provided with the first axial inclined to one side hole (86) and the second inclined to one side hole (87), it is characterized in that, the reverse sealing mechanism of downhole fluid (8) is housed in described main body (4), in the second described inclined to one side hole (87), side valve type pressure measuring mechanism (7) is housed.
2. the eccentric injection mandrel with reverse sealing function according to claim 1, it is characterized in that, the reverse sealing mechanism of described downhole fluid (8) comprises first half of the month ring (82), the second half of the month ring (83) and rubber tube (84), ring in first half of the month (82) in the respective slot of described main body (4) outer peripheral face, is provided with liquid pass hole (831) radially with the upper and lower coaxial sleeve of the second half of the month ring (83) on the second half of the month ring (83); Rubber tube (84) covers the periphery of ring in first half of the month (82) and the second half of the month ring (83); Corresponding to first half of the month ring (82) with locate to be provided with semi-moon shaped upper channel (81) with the first inclined to one side hole (86), this upper channel (81) is crossing with the first inclined to one side hole (86); On the outer peripheral face of the main body (4) corresponding to the second half of the month ring (83) and be respectively equipped with the lower channel (88) of one and a half months shape corresponding to the both sides of upper channel (81).
3. the eccentric injection mandrel with reverse sealing function according to claim 1, it is characterized in that, described side valve type pressure measuring mechanism (7) comprises bolt top cover (71), piston (72), spring (74) and spring stack (78), the bottom of spring stack (78) is threaded connection in the second lower end, inclined to one side hole (87), at the upper pocketed springs (74) of spring stack (78), piston (72) is installed on top at this spring (74), on the top of this piston (72), with bolt top cover (71), is connected with the top in the second inclined to one side hole (87); In the axle center of piston (72), be provided with the centre bore (73) that runs through bottom, outer peripheral face at piston (72) is provided with three seals ring (721), between adjacent joint ring (721), be respectively equipped with upper and lower annular groove (722,723), annular groove on this (722) communicates with centre bore (73); Between the second inclined to one side hole (87) of the above and below corresponding to piston (72) and the centre bore of described main body (4), be respectively equipped with upper hole (76) and lower hole (77); On the top in the second inclined to one side hole (87), be provided with the accessibke porosity (75) with described main body (4) exterior.
4. the eccentric injection mandrel with reverse sealing function according to claim 3, is characterized in that, at the lower, outer perimeter face of described spring stack (78), is provided with joint ring (781).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310493328.7A CN103541700B (en) | 2013-10-21 | 2013-10-21 | Reverse sealed eccentric injection mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310493328.7A CN103541700B (en) | 2013-10-21 | 2013-10-21 | Reverse sealed eccentric injection mandrel |
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| Publication Number | Publication Date |
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| CN103541700A true CN103541700A (en) | 2014-01-29 |
| CN103541700B CN103541700B (en) | 2015-10-28 |
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| CN201310493328.7A Active CN103541700B (en) | 2013-10-21 | 2013-10-21 | Reverse sealed eccentric injection mandrel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196502A (en) * | 2014-08-26 | 2014-12-10 | 康庆刚 | Sand-preventing eccentric water distributor |
| CN105317410A (en) * | 2014-07-07 | 2016-02-10 | 河南旭然石油钻采机械有限公司 | Eccentric water distributor |
| CN110847869A (en) * | 2019-11-15 | 2020-02-28 | 大庆市海兴石油科技发展有限公司 | Novel eccentric water distributor with pressure seal checking function |
| CN110924909A (en) * | 2019-11-21 | 2020-03-27 | 齐齐哈尔亚盛机械制造有限公司 | Straight-fishing anti-blocking eccentric water distributor |
| WO2021092945A1 (en) * | 2019-11-15 | 2021-05-20 | 大庆市海兴石油科技发展有限公司 | New eccentric water distributor capable of performing seal inspection under pressure |
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| CN2646373Y (en) * | 2003-10-14 | 2004-10-06 | 大庆油田有限责任公司 | Balanced type sealing segment |
| CN1560431A (en) * | 2004-03-05 | 2005-01-05 | 婷 尹 | Method of bridge type eccentric pouring water layering pressure testing |
| CN2683847Y (en) * | 2004-03-30 | 2005-03-09 | 杨朝杰 | Eccentric water distributor capable of checking sealing of pouring-stop layer without pulling out blanking plug |
| CN202249914U (en) * | 2011-07-25 | 2012-05-30 | 中国石油天然气股份有限公司 | Bidirectional pressure transmission test sealer |
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| CN202937241U (en) * | 2012-12-18 | 2013-05-15 | 大庆市腾飞石油机械有限公司 | Bridge type eccentricity water distributor |
| CN203239329U (en) * | 2013-04-02 | 2013-10-16 | 中国石油天然气股份有限公司 | Separated layer water injection high-pressure seal examining instrument |
| CN203547693U (en) * | 2013-10-21 | 2014-04-16 | 康庆刚 | Reversed sealing type eccentric water distributor |
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2013
- 2013-10-21 CN CN201310493328.7A patent/CN103541700B/en active Active
Patent Citations (10)
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| US5142608A (en) * | 1991-04-29 | 1992-08-25 | Meshekow Oil Recovery Corp. | Horizontal steam generator for oil wells |
| CN1263978A (en) * | 2000-03-10 | 2000-08-23 | 大庆油田有限责任公司 | Bridge-type eccentric testing and injection-recovery apparatus |
| CN2646373Y (en) * | 2003-10-14 | 2004-10-06 | 大庆油田有限责任公司 | Balanced type sealing segment |
| CN1560431A (en) * | 2004-03-05 | 2005-01-05 | 婷 尹 | Method of bridge type eccentric pouring water layering pressure testing |
| CN2683847Y (en) * | 2004-03-30 | 2005-03-09 | 杨朝杰 | Eccentric water distributor capable of checking sealing of pouring-stop layer without pulling out blanking plug |
| CN202249914U (en) * | 2011-07-25 | 2012-05-30 | 中国石油天然气股份有限公司 | Bidirectional pressure transmission test sealer |
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| CN203239329U (en) * | 2013-04-02 | 2013-10-16 | 中国石油天然气股份有限公司 | Separated layer water injection high-pressure seal examining instrument |
| CN203547693U (en) * | 2013-10-21 | 2014-04-16 | 康庆刚 | Reversed sealing type eccentric water distributor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317410A (en) * | 2014-07-07 | 2016-02-10 | 河南旭然石油钻采机械有限公司 | Eccentric water distributor |
| CN105317410B (en) * | 2014-07-07 | 2019-01-29 | 河南福侨石油装备有限公司 | A kind of eccentric injection mandrel |
| CN104196502A (en) * | 2014-08-26 | 2014-12-10 | 康庆刚 | Sand-preventing eccentric water distributor |
| CN110847869A (en) * | 2019-11-15 | 2020-02-28 | 大庆市海兴石油科技发展有限公司 | Novel eccentric water distributor with pressure seal checking function |
| CN110847869B (en) * | 2019-11-15 | 2020-06-09 | 大庆市海兴石油科技发展有限公司 | Eccentric water distributor with pressure seal checking |
| WO2021092945A1 (en) * | 2019-11-15 | 2021-05-20 | 大庆市海兴石油科技发展有限公司 | New eccentric water distributor capable of performing seal inspection under pressure |
| CN110924909A (en) * | 2019-11-21 | 2020-03-27 | 齐齐哈尔亚盛机械制造有限公司 | Straight-fishing anti-blocking eccentric water distributor |
| CN110924909B (en) * | 2019-11-21 | 2020-07-14 | 齐齐哈尔亚盛机械制造有限公司 | Straight-fishing anti-blocking eccentric water distributor |
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| CN103541700B (en) | 2015-10-28 |
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Effective date of registration: 20190724 Address after: Heilongjiang province Daqing City Honggang District 163000 Qing Nan Industrial Park Patentee after: Daqing Kangsheng Petroleum Energy-saving Technology Development Co., Ltd. Address before: 163355 Changkang Grand Company of Wuxing Village Post Office, Honggang District, Daqing City, Heilongjiang Province Patentee before: Kang Qinggang |