CN104196505A - Layered injection device for chemical flooding - Google Patents
Layered injection device for chemical flooding Download PDFInfo
- Publication number
- CN104196505A CN104196505A CN201410422688.2A CN201410422688A CN104196505A CN 104196505 A CN104196505 A CN 104196505A CN 201410422688 A CN201410422688 A CN 201410422688A CN 104196505 A CN104196505 A CN 104196505A
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- main body
- injection device
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- month
- side hole
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- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 239000000126 substance Substances 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 3
- 238000011001 backwashing Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a layered injection device for chemical flooding. The lower end of an upper connector of the layered injection device is in threaded connection with the upper end of an upper connection sleeve. The lower end of the upper connection sleeve is in threaded connection with the upper end of a body. A guide body is arranged inside the upper connection sleeve. The lower end of the guide body is connected with the upper end of the body. The guide body is installed inside a centralizer body. The lower end of the body is in threaded connection with a lower connector. An axial first eccentric hole and an axial second eccentric hole are formed in the body along the periphery. An underground fluid reverse sealing mechanism is installed on the body. A slide valve type pressure measurement mechanism is installed inside the second eccentric hole. The layered injection device for chemical flooding has the advantages that on one hand, the reverse sealing mechanism operates and prevents fluid in a high pressure layer from flowing backward into a low pressure layer through the layered injection device at the time of shut-in or injection halt of an injection well; on the other hand, pressure measurement after reverse sealing and sealing examination of layered injection tubular columns can be realized through the slide valve type pressure measurement mechanism. Meanwhile, the problem that well clean-up is not thorough due to flow splitting of washing fluid on the layered injection device in the well backwashing process can be solved. The layered injection device for chemical flooding is good in process succession and convenient to apply on site.
Description
Technical field
The present invention relates to a kind of oil extraction in oil field technique layering implantation tool, specifically a kind of chemical flooding layering injection device.
Background technology
The proportion of chemical flooding technology in oil field increases gradually at present, is one of important means in oilfield development process.At present, a lot of oil fields all adopt eccentric layering injection technology, and existing chemical flooding does not have the oppositely function of sealing with eccentric flow regulator, 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 flow regulator, and reservoir sand and foul are carried and entered in oil pipe, affected the effect that layering is injected.When Injection Well needs well-flushing, flushing fluid can enter in oil pipe on eccentric flow regulator, 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 layering injection string.
Summary of the invention
The object of this invention is to provide a kind of chemical flooding layering injection device, for chemical flooding layering injection technology, solve the reverse sealing problem of oil field layered Injection Well eccentric flow regulator, designed the envelope problem of testing that side valve type pressure measuring mechanism has solved pressure measurement and layering injection string after reverse sealing simultaneously, for oil field, further improve layering and inject effect, technical support is provided.
Technical scheme of the present invention is: a kind of chemical flooding layering injection device, comprise top connection, upper joint sleeve, centralizer body, guide way, main body and lower contact, wherein the lower end of top connection and the upper end of upper joint sleeve are threaded, and the lower end of upper joint sleeve is threaded with the upper end of main body; Guide way is inserted in upper joint sleeve, and the lower end of guide way and the upper end of main body are connected by screw, and guide way is installed in centralizer body; The lower end of main body is threaded with lower contact; 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 centerbody 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; The periphery that rubber sleeve was encircled in first half of the month ring and the second half of the month; Corresponding to first half of the month ring with the outer peripheral face of the main body at 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; At the outer peripheral face of the main body corresponding to the second half of the month ring and corresponding to two jiaos of other lower channels that are respectively provided with one and a half months shape of upper channel, one jiao of this lower channel overlaps and communicates with two jiaos of upper channel respectively.
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 lower hole of the second lower end, inclined to one side hole, pocketed springs on spring stack, in the bottom of described spring stack, be provided with outward flange as spring-loaded bearing, in bottom, be provided with centre bore, the top of this centre bore communicates with the outside of spring stack bottom; On this spring top, piston is installed, on the top of this piston, with bolt top cover, is connected with the top in the second inclined to one side hole; Only in the axle center of piston, be provided with the centre bore that the bottom with piston connects, 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 is near upper end and the centre bore of described main body, be provided with hole; On the top in the second inclined to one side hole, be provided with the accessibke porosity with described main body exterior.
The invention has the beneficial effects as follows: the one, when 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 layering injection device, the 2nd, by side valve type pressure measuring mechanism, can realize the envelope of testing of pressure measurement after reverse sealing and layering injection string.In the time of can solving anti-flushing well, flushing fluid is shunted the halfway problem of well-flushing that causes on layering injection device simultaneously.Using method and original chemical flooding are just the same with eccentric flow regulator, 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 chemical flooding of the present invention layering injection device, comprises top connection 1, upper joint sleeve 2, centralizer body 3, guide way 4, main body 5 and lower contact 6.Wherein top connection 1 is threaded with upper joint sleeve 2, packs into after guide way 4 in centralizer body 3, after its lower end and main body 5 are connected by screw, inserts in upper joint sleeve 2, and main body 5 is threaded with lower contact 6; In main body 5, 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 flow regulator.
The present invention has carried out following improvement on the basis of existing eccentric flow regulator: the reverse sealing mechanism 8 of downhole fluid is housed on the top of described main body 5, 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, and the bottom 781 of spring stack 78 is threaded connection in the lower hole 77 of 87 lower ends, the second inclined to one side hole.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.In the bottom 781 of described spring stack 78, be provided with outward flange as the bearing of shock mount 74, in bottom, 781 are provided with centre bore 782, and the top of this centre bore 782 communicates with the outside of spring stack 78 bottoms.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 is near upper end and the centre bore of described main body 5, be provided with hole 76, the lower hole 77(that is provided with undergauge in the lower end in the second inclined to one side hole 87 is provided with internal thread, is threaded connection with the bottom 781 of spring stack 78).On the top in the second inclined to one side hole 87, be provided with the accessibke porosity 75 with described main body 5 exterior.
When the present invention normally 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 5 is inside and outside seals.When pressure-measuring sealing section acts on centre bore 73 when interior, the sealing cup of pressure-measuring sealing section is 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 5, that realizes pressure measurement and layering injection string tests envelope function.
Referring to Fig. 2-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 and rubber tube 84, encircle 82 first half of the month and encircle in the respective slot of the outer peripheral face that Shang Xia 83, coaxial sleeve is located on the upper side at described main body 5 middle parts with the second half of the month, in the second half of the month, encircle on 83 and be provided with liquid pass hole 831 radially; Rubber tube 84 cover (cover) first half of the month encircle 82 and the second half of the month encircle 83 periphery.Corresponding to encircling 82 and be provided with semi-moon shaped upper channel 81 with the outer peripheral face of the main body 5 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 main body 5 that encircles 83 places corresponding to the second half of the month and corresponding to two jiaos of upper channel 81, be otherly arranged with two semi-moon shaped lower channels 88, one jiao of this lower channel 88 respectively with two jiaos overlap and communicate (referring to Fig. 4) of upper channel 81.
Because the output channel (upper channel 81) of main body 5 has been located rubber tube 84 parcels, so when carrying out pressure measurement with pressure-measuring sealing section or layering injection string is tested to envelope, oil pipe external pressure cannot be transmitted in the pressure-measuring sealing section in oil pipe by exit passageway.When injection 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 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 note, strata pressure is greater than oil pipe internal pressure, rubber tube 84 oppositely seals output channel (upper channel 81) under hydraulic action, make high pressure zone liquid enter oil pipe by output channel, avoid reservoir sand and foul to pour in down a chimney in device and oil pipe, affect multi-zone flow regulating effect.
Claims (3)
1. a chemical flooding layering injection device, comprise top connection (1), upper joint sleeve (2), centralizer body (3), guide way (4), main body (5) and lower contact (6), the lower end of wherein top connection (1) is threaded with the upper end of upper joint sleeve (2), and the lower end of upper joint sleeve (2) is threaded with the upper end of main body (5); Guide way (4) is inserted in upper joint sleeve (2), and the upper end of the lower end of guide way (4) and main body (5) is connected by screw, and guide way (4) is installed in centralizer body (3); The lower end of main body (5) is threaded with lower contact (6); In main body (5), 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 (5), in the second described inclined to one side hole (87), side valve type pressure measuring mechanism (7) is housed.
2. chemical flooding according to claim 1 layering injection device, 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 centerbody (85) 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) is enclosed within the periphery of ring in first half of the month (82) and the second half of the month ring (83); Outer peripheral face in the main body (5) of locating corresponding to first half of the month ring (82) with the first inclined to one side hole (86) is provided with semi-moon shaped upper channel (81), and this upper channel (81) is crossing with the first inclined to one side hole (86); At the outer peripheral face of the main body (5) corresponding to the second half of the month ring (83) and corresponding to two jiaos of other lower channels (88) that are respectively provided with one and a half months shape of upper channel (81), one jiao of this lower channel (88) overlaps and communicates with two jiaos of upper channel (81) respectively.
3. chemical flooding according to claim 1 layering injection device, 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 (781) of spring stack (78) is threaded connection in the lower hole (77) of the second lower end, inclined to one side hole (87), at the upper pocketed springs (74) of spring stack (78), bottom (781) in described spring stack (78) is provided with outward flange as the bearing of shock mount (74), in bottom, (781) are provided with centre bore (782), the top of this centre bore (782) communicates with the outside of spring stack (78) bottom, 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), 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 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) is near upper end and the centre bore of described main body (5), be provided with upper hole (76), on the top in the second inclined to one side hole (87), be provided with the accessibke porosity (75) with described main body (5) exterior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422688.2A CN104196505B (en) | 2014-08-26 | 2014-08-26 | Chemical flooding layering injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422688.2A CN104196505B (en) | 2014-08-26 | 2014-08-26 | Chemical flooding layering injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196505A true CN104196505A (en) | 2014-12-10 |
| CN104196505B CN104196505B (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410422688.2A Active CN104196505B (en) | 2014-08-26 | 2014-08-26 | Chemical flooding layering injection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104196505B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761617A (en) * | 2016-12-09 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of chemical flooding dispensing well self-timing deployment device |
| CN107165606A (en) * | 2017-06-26 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Upper strata high pressure negative pressure point device for picking |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683951A (en) * | 1986-05-15 | 1987-08-04 | Atlantic Richfield Company | Chemical flooding and controlled pressure pulse fracturing process for enhanced hydrocarbon recovery from subterranean formations |
| CN201391299Y (en) * | 2009-03-28 | 2010-01-27 | 狄旭庆 | Injected polymer bridge type eccentric injection distribution device |
| CN202707020U (en) * | 2012-08-09 | 2013-01-30 | 毛元红 | Fusiform spherical eccentric distributing and injecting device |
| CN203188987U (en) * | 2013-05-02 | 2013-09-11 | 中国石油天然气股份有限公司 | Injection allocation device for polymer flooding sleeve variable well |
| CN204175267U (en) * | 2014-08-26 | 2015-02-25 | 康庆刚 | Chemical flooding layering injection device |
-
2014
- 2014-08-26 CN CN201410422688.2A patent/CN104196505B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683951A (en) * | 1986-05-15 | 1987-08-04 | Atlantic Richfield Company | Chemical flooding and controlled pressure pulse fracturing process for enhanced hydrocarbon recovery from subterranean formations |
| CN201391299Y (en) * | 2009-03-28 | 2010-01-27 | 狄旭庆 | Injected polymer bridge type eccentric injection distribution device |
| CN202707020U (en) * | 2012-08-09 | 2013-01-30 | 毛元红 | Fusiform spherical eccentric distributing and injecting device |
| CN203188987U (en) * | 2013-05-02 | 2013-09-11 | 中国石油天然气股份有限公司 | Injection allocation device for polymer flooding sleeve variable well |
| CN204175267U (en) * | 2014-08-26 | 2015-02-25 | 康庆刚 | Chemical flooding layering injection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761617A (en) * | 2016-12-09 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of chemical flooding dispensing well self-timing deployment device |
| CN107165606A (en) * | 2017-06-26 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Upper strata high pressure negative pressure point device for picking |
| 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 |
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| CN104196505B (en) | 2016-06-15 |
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Effective date of registration: 20190731 Address after: 163000 Qingnan Industrial Park, Honggang District, Harbin City, Heilongjiang Province Patentee after: Daqing Kangsheng Petroleum Energy-saving Technology Development Co., Ltd. Address before: 163000 Xiyuan Street, Ximen, Guangxia New Town, Jeanhu Road District, Daqing City, Heilongjiang Province, 193 Patentee before: Kang Qinggang |