CN103256017A - High-pressure water injection packer - Google Patents
High-pressure water injection packer Download PDFInfo
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- CN103256017A CN103256017A CN 201310080911 CN201310080911A CN103256017A CN 103256017 A CN103256017 A CN 103256017A CN 201310080911 CN201310080911 CN 201310080911 CN 201310080911 A CN201310080911 A CN 201310080911A CN 103256017 A CN103256017 A CN 103256017A
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- ring
- sealing ring
- backwash
- central tube
- cover
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Abstract
A high-pressure water injection packer mainly comprises a sealing mechanism, a setting mechanism, a locking mechanism, an unblocking mechanism, a reverse well-flushing mechanism and the like. The sealing mechanism mainly comprises an outer central tube, a long rubber cylinder, a spacer ring, a short rubber cylinder and the like. The setting mechanism mainly comprises an upper central tube, a lower central tube, a setting shear pin, a piston, a lower cylinder liner, a lower reverse flushing jacket, a spring holder, a spring, a reverse flushing valve seat, an outer central tube, a pressure ring and the like. The locking mechanism mainly comprises a lock ring, a support ring, a lock loop and the like. The unblocking mechanism mainly comprises an upper joint, an upper central tube, a lower central tube, a lower joint, an unblocking shear pin and the like. The reverse well-flushing mechanism mainly comprises an upper reverse flushing jacket, a central tube, an outer central tube, a lower reverse flushing jacket, a reverse flushing valve seat, a reverse flushing piston and the like. The high-pressure water injection packer has the advantages that the defects of poor setting reliability, small packing area and low construction integration rate are overcome, the packer is especially satisfactory to high-pressure separated layer water injection, and the high-pressure water injection packer is high in packing success rate, long in effective lifetime and the like.
Description
Technical field
The present invention relates to a kind of seal pack device, especially be mainly used in oil field high pressure dispensing, also can be used for a kind of high pressure water injection packer of technological measures such as formation testing by layer, oil recovery, water detection, water blockoff, pressure break, acidifying and sand control.
Background technology
Along with continually developing of oil field, oil-water well is in exploitation and the injecting process, because the continuous adjustment of development plan and be subjected to oil, gas, water transport moves, geostatic stress, corrosion, geological structure and working measure factors of affecting, make the former cement sheath of producing well and oil reservoir scurry logical, in order to adjust intake profile, increase flood effectiveness, thereby reduce water ratio in oil well and improve recovery ratio, usually used packer to carrying out the subdivision of reservoir water filling, thereby realized at different times the different layers position, different well sections are carried out the subdivision of reservoir water filling, meticulous water filling, when the prolongation of oilfield exploitation time, the energy of oil reservoir own constantly is consumed, and causes formation pressure also to descend thereupon, the down-hole viscosity of crude increases, oil well output reduces, even can stop-spraying stop production, and causes the residual a large amount of dead oils in down-hole and adopts to come out.In order to keep or to improve formation pressure, realize stable high yield, and obtain higher recovery, must carry out the water filling operation to oil well.In secondary recovery operation, multi-zone flow regulating is to realize oil field extended high rate stable yields, improves an important oil production technology of recovery ratio.Like product packer in the market, it is to be fixed by one-way slip, transfers compression and sets, and the compression of upper lifting pipe post deblocking is every device, and advantage is can repeat to set, and is fit to look for Lou, tests that cover etc. repeatedly sets, the deblocking measure; Defective is to set reliably inadequately, and well commutates more deeply and sets just more difficult; The packing area is little, and the construction success rate is low, particularly card envelope is repeatedly made the position of casing wall damage, owing to during conventional water injection packer high pressure water injection, always wash out O shape circle or seal on the backwash piston, thereby destroyed sealing effectiveness.Poor sealing performance, the construction success rate is low, can not be satisfied with the needs of high-voltage layering injection.
Summary of the invention
The purpose of this invention is to provide a kind of high pressure water injection packer, designed double sealing.Seal has directly been inlayed in lower end at the backwash valve seat, not only solved above-mentioned set reliable inadequately, the packing area is little, the low shortcoming of construction success rate, and mainly by seal, set, mechanisms such as locking, deblocking and anti-flushing well form, and are specially adapted to the needs in high-voltage layering injection, therefore have good seal performance, packing success rate height, advantage such as effective life is long.
The objective of the invention is to be achieved through the following technical solutions:
A kind of high pressure water injection packer, mainly by seal, set, mechanism such as locking, deblocking and anti-flushing well forms.Described sealing mechanism is mainly by exterior central tube, long packing element type, spacer ring, compositions such as short rubber cylinder, described setting mechanism is mainly by upper center tube, lower center tube, set shear pin, piston, following cylinder sleeve, following backwash cover, spring base, spring, the backwash valve seat, exterior central tube, compositions such as pressure ring, described retaining mechanism is mainly by lock ring, support ring, compositions such as lock ring cover, described solution sealing mechanism is mainly by top connection, upper center tube, lower center tube, lower contact, compositions such as deblocking shear pin, described anti-flushing well mechanism is mainly by last backwash cover, central tube, exterior central tube, following backwash cover, the backwash valve seat, compositions such as backwash piston.
Further specify, a kind of high pressure water injection packer, comprise top connection, upper center tube, last backwash cover, pressure ring first sealing ring, exterior central tube, packing element, pressure ring, the backwash valve seat, second sealing ring, the backwash piston, the 3rd sealing ring, spring, spring base, the 4th sealing ring, lower center tube, following backwash cover, following cylinder sleeve, piston, lock ring, support ring, the deblocking shear pin, the lock ring cover, adapter sleeve, set shear pin, and ring, and cap, lower contact, seal, following backwash hole, it is characterized in that described top connection is connected by tubing round thread with upper center tube tightens, tighten by being threaded with last backwash cover after the seal groove of pressure ring is embedded in first sealing ring, the last backwash cover in this two composite member is tightened by being threaded with top connection.Tighten by being threaded with exterior central tube after embedding first sealing ring, second sealing ring in the inside and outside seal groove of described backwash valve seat respectively.On exterior central tube, put packing element and spacer ring successively, this composite member is enclosed within on the upper center tube cylindrical and with the pressure ring endoporus cooperates.The backwash piston of described spring base, spring and embedding second sealing ring, the 3rd sealing ring installs to down in the endoporus of backwash cover successively, will descend the backwash cover to tighten by being threaded with the backwash valve seat again.The external seal groove of described lower center tube tightens by being threaded with upper center tube after being embedded in the 4th sealing ring.Following cylinder sleeve is connected with following backwash external threading and tightens.The inside and outside seal groove of piston is embedded in the endoporus of putting into cylinder sleeve down behind the 3rd sealing ring, the 4th sealing ring.The seal groove of lower contact is loaded onto the 4th sealing ring, puts lock ring, support ring on the cylindrical of middle part successively, the first-class deblocking shear pin of difference in the screwed hole of support ring.The lock ring cover is threaded and tightens with following cylinder sleeve, adapter sleeve respectively.And ring is connected on the external screw thread at lower contact middle part, make its water jacket relative with the hole of adapter sleeve after, the first-class shear pin that sets in its screwed hole, also cap tightens by being threaded with lower contact at last.
Further specify, a kind of high pressure water injection packer, described first sealing ring has 2, and described second sealing ring has 5, and described the 3rd sealing ring has 4, and described the 4th sealing ring has 6.
The operating principle of a kind of high pressure water injection packer of the present invention is:
When setting, behind design attitude, in oil pipe, add hydraulic pressure under the packer, hydraulic pressure promotes piston by the central tube pressure port, when pressure reaches certain value, sets shear pin and is cut off.Under the fluid power effect, piston mechanism continues up, compression packing element, sealing oil jacket annular space.After the pressure release, the retaining mechanism that lock ring, support ring, lock ring cover are formed enters lock-out state, prevents the packer accessory resilience, finishes setting of packer.
When well-flushing, behind the packer setting, suppress from the oil jacket annular space, liquid covers into from last backwash, promote the backwash descent of piston, open the well-flushing passage, flushing fluid flows out from the weep hole that descends the backwash cover through the annular space of upper center tube and exterior central tube, enter oil pipe and instead to ground, reach the purpose of anti-flushing well from the tubing string bottom again.After the pressure release, the backwash piston resets under the effect of spring, can close the backwash passage.
When deblocking, the upper lifting pipe post moves on the parts such as top connection drive central tube, and motionless because of the friction maintenance of cartridge and sleeve pipe, the deblocking shear pin is cut off, and retaining mechanism loses locking, seal resilience, packer deblocking.
The beneficial effect of a kind of high pressure water injection packer of the present invention is: designed double sealing.Directly inlayed seal such as the lower end at the backwash valve seat, like this from the high pressure backwash liquor of upper end just towards not bad this seal.In addition, done improvement etc. at the structural parameters in following backwash hole.Can repeat backwash.Thereby solved the technical problem that the conventional waterflooding packer can only backwash, again because adopted upper center tube, lower center tube, set shear pin, piston, down cylinder sleeve, backwash cover, spring base, spring, backwash valve seat, exterior central tube, pressure ring etc. are formed setting mechanisms down, so good seal performance, packing success rate height, effective life, is long; Simultaneously, form anti-flushing well mechanism by last backwash cover, central tube, exterior central tube, following backwash cover, backwash valve seat, backwash piston etc., when well-flushing, behind the packer setting, suppress from the oil jacket annular space, liquid covers into from last backwash, promote the backwash descent of piston, open the well-flushing passage, flushing fluid flows out from the weep hole that descends the backwash cover through the annular space of upper center tube and exterior central tube, enter oil pipe and instead to ground, reach the purpose of anti-flushing well from the tubing string bottom again.After the pressure release, the backwash piston resets under the effect of spring, can close the backwash passage, makes packer sealing more reliable, and construction has higher success rate, and has sand control, anti-dirty, anti-sticking function preferably, is specially adapted to the needs of high-voltage layering injection.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the backwashing mechanism part enlarged drawing of Figure 11 portion.
In figure Fig. 1, Fig. 2:
The 1-top connection, the 2-upper center tube, the last backwash cover of 3-, the 4-pressure ring, 5-first sealing ring, the 6-exterior central tube, the 7-packing element, the 8-pressure ring, 9-backwash valve seat, 10-second sealing ring, 11-backwash piston, 12-the 3rd sealing ring, the 13-spring, the 14-spring base, 15-the 4th sealing ring, the 16-lower center tube, backwash cover under the 17-, cylinder sleeve under the 18-, the 19-piston, the 20-lock ring, the 21-support ring, 22-deblocking shear pin, 23-lock ring cover, the 24-adapter sleeve, 25-sets shear pin, 26-and ring, 27-and cap, the 28-lower contact, the 29-seal, backwash hole under the 30-.
The specific embodiment
As Fig. 1, shown in Figure 2, a kind of high pressure water injection packer of the present invention, comprise top connection 1, upper center tube 2, last backwash cover 3, pressure ring 4, first sealing ring 5, exterior central tube 6, packing element 7, pressure ring 8, backwash valve seat 9, second sealing ring 10, backwash piston 11, the 3rd sealing ring 12, spring 13, spring base 14, the 4th sealing ring 15, lower center tube 16, following backwash cover 17, following cylinder sleeve 18, piston 19, lock ring 20, support ring 21, deblocking shear pin 22, lock ring cover 23, adapter sleeve 21, set shear pin 25, and encircle 26, and cap 27, lower contact 28, seal 29, following backwash hole 30, it is characterized in that described top connection 1 and upper center tube 2 are connected by tubing round thread tightens, the seal groove of pressing pressure ring 4 is embedded in first sealing ring, 5 backs and last backwashes cover 3 tightens by being threaded, the last backwash in this two composite member is overlapped 3 and tighten by being threaded with top connection 1.Tighten by being threaded with exterior central tube 6 after embedding first sealing ring 5, second sealing ring 10 in the inside and outside seal groove of described backwash valve seat 9 respectively.On exterior central tube 6, put packing element 7 and spacer ring 8 successively, this composite member is enclosed within on upper center tube 2 cylindricals and with pressure ring 8 endoporus cooperates.Described spring base 14, spring 13 and the backwash piston 11 that embeds second sealing ring 10, the 3rd sealing ring 12 install to down backwash successively and overlap in 17 the endoporus, will descend backwash to overlap 17 again and tighten by being threaded with backwash valve seat 9.The external seal groove of described lower center tube 16 is embedded in the 4th sealing ring 15 backs and tightens by being threaded with upper center tube 2.Following cylinder sleeve 18 is threaded with following backwash cover 17 and tightens.The inside and outside seal groove of piston 19 is embedded in the endoporus of cylinder sleeve 18 under the 3rd sealing ring 12, the 15 back threadings of the 4th sealing ring.The seal groove of lower contact 28 is loaded onto the 4th sealing ring 15, puts lock ring 20, support ring 21 on the cylindrical of middle part successively, the first-class deblocking shear pin 22 of difference in the screwed hole of support ring 21.Lock ring cover 23 is threaded and tightens with following cylinder sleeve 18, adapter sleeve 24 respectively.And encircle 26 and be connected on the external screw thread at lower contact 28 middle parts, make its water jacket relative with the hole of adapter sleeve 24 after, the first-class shear pin 25 that sets in its screwed hole, at last will and cap 27 tighten by being threaded with lower contact 28.
Above-described embodiment, the present invention specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out its contour structures and compound mode etc. all should be included in protection scope of the present invention.
Claims (2)
1. high pressure water injection packer, comprise top connection, upper center tube, last backwash cover, the pressure ring sealing ring, exterior central tube, packing element, pressure ring backwash valve seat, second sealing ring, the backwash piston, the 3rd sealing ring, spring, spring base, the 4th sealing ring, lower center tube, following backwash cover, following cylinder sleeve, piston, lock ring, support ring, the deblocking shear pin, the lock ring cover, adapter sleeve, set shear pin, and ring, and cap, lower contact, seal, following backwash hole, it is characterized in that described top connection is connected by tubing round thread with upper center tube tightens, tighten by being threaded with last backwash cover after the seal groove of pressure ring is embedded in first sealing ring, to go up the backwash cover tightens by being threaded with top connection, embed first sealing ring respectively in the inside and outside seal groove of described backwash valve seat, tighten by being threaded with exterior central tube behind second sealing ring, on exterior central tube, put packing element and spacer ring successively, described spring base, spring and embedding second sealing ring, the backwash piston of the 3rd sealing ring installs to down in the endoporus of backwash cover successively, to descend the backwash cover to tighten by being threaded with the backwash valve seat, the external seal groove of described lower center tube tightens by being threaded with upper center tube after being embedded in the 4th sealing ring, following cylinder sleeve is connected with following backwash external threading and tightens, the inside and outside seal groove of piston is embedded in the 3rd sealing ring, put in the endoporus of following cylinder sleeve behind the 4th sealing ring, the seal groove of lower contact is loaded onto the 4th sealing ring, put lock ring successively on the cylindrical of middle part, support ring, the first-class deblocking shear pin of difference in the screwed hole of support ring, lock ring cover respectively with following cylinder sleeve, adapter sleeve is threaded and tightens, and ring is connected on the external screw thread at lower contact middle part, the first-class shear pin that sets in its screwed hole, also cap tightens by being threaded with lower contact.
2. a kind of high pressure water injection packer according to claim 1 is characterized in that described first sealing ring has 2, and described second sealing ring has 5, and described the 3rd sealing ring has 4, and described the 4th sealing ring has 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310080911 CN103256017A (en) | 2013-03-11 | 2013-03-11 | High-pressure water injection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310080911 CN103256017A (en) | 2013-03-11 | 2013-03-11 | High-pressure water injection packer |
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| Publication Number | Publication Date |
|---|---|
| CN103256017A true CN103256017A (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310080911 Pending CN103256017A (en) | 2013-03-11 | 2013-03-11 | High-pressure water injection packer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653145A (en) * | 2013-11-25 | 2015-05-27 | 天津大港油田钻采技术开发公司 | Long-rubber-barrel differential pressure type water filling packer capable of washing well |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
| CN105019857A (en) * | 2015-07-18 | 2015-11-04 | 阜宁县宏达石化机械有限公司 | Sealed liquid injection device |
| CN109113638A (en) * | 2018-09-18 | 2019-01-01 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of back-washable inflatable packer |
-
2013
- 2013-03-11 CN CN 201310080911 patent/CN103256017A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653145A (en) * | 2013-11-25 | 2015-05-27 | 天津大港油田钻采技术开发公司 | Long-rubber-barrel differential pressure type water filling packer capable of washing well |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
| CN104929563B (en) * | 2015-05-27 | 2017-10-17 | 中国石油天然气股份有限公司 | Water injection packer |
| CN105019857A (en) * | 2015-07-18 | 2015-11-04 | 阜宁县宏达石化机械有限公司 | Sealed liquid injection device |
| CN109113638A (en) * | 2018-09-18 | 2019-01-01 | 宝鸡瑞林石油机电设备有限责任公司 | A kind of back-washable inflatable packer |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130821 |