CN2360594Y - Self-checking stratified filling packer able to wash well - Google Patents
Self-checking stratified filling packer able to wash well Download PDFInfo
- Publication number
- CN2360594Y CN2360594Y CN 98239538 CN98239538U CN2360594Y CN 2360594 Y CN2360594 Y CN 2360594Y CN 98239538 CN98239538 CN 98239538 CN 98239538 U CN98239538 U CN 98239538U CN 2360594 Y CN2360594 Y CN 2360594Y
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- packer
- well
- flushing
- water injection
- envelope
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- Expired - Fee Related
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Abstract
The self-checking stratified filling packer able to wash well of the utility model is a packer which is used in the development of oilfield flooding. It is composed of a seat seal power section, a seal portion, a seal inspection part, a locking part, a De-Archive part, a flushing part and the anti-interlaminar connected component used when filling stops. Compared with prior art, the packer solves the difficulty that the old self-sealing examination packer is unable to flushing, and it makes the seal seat and the self seal inspection can be realized simultaneously. In addition, when the filling stops, the interlaminar can not back flow. The packer can suppresses the formation sand flow of the outlet sand drain to certain extent, and lengthens the normal water injection synchronization of the flood period well.
Description
The utility model relates to a kind of water injection well in oil fields exploitation and sends out the middle washing well that uses from testing envelope seperated layer water injection packer, belongs to the downhole tool class.
The oil field of waterflooding extraction produces the prolongation of the same period along with recovering the oil, and strata pressure will constantly descend, and in order to maintain exploitation under certain producing pressure differential, continuously to the stratum water filling, keeping its energy is a crucial job.Advanced water injection technology is to finish by the water injection string of dependable performance, and packer is one of key tool in the water injection string, and its performance quality directly influences the effect of water flooding, to the stable yields of oil well, keeps strata pressure and plays crucial effects.There is following problem in the packer that uses in the stratified injection water technology in existing technology.Whether one, the packer of crossing the perforated zone can't realize testing envelope, have only by zonal testing to seal by indirect deduction packer, and effect is not directly perceived.If test failure operation again again brings unnecessary loss to production; Can not bear the interlayer pressure difference when stopping annotating when two, present normally used cup packer uses, cause a layer interior interlayer to pour in down a chimney, the easy sand pipe laying of sand output well post, sand buries tubing string extremely sometimes, to such an extent as to oil pipe pulls off or deviates from during operation; Three, the incomplete rate of packer deblocking of the prior art reaches 90%, and packing element comes off and causes trouble of lost tool in hole, stops up the well-flushing passage of packer, and indivedual well well-flushings are obstructed.
The purpose of this utility model is to provide and can realizes reliably in a kind of work from testing the seperated layer water injection packer that Feng Bingke carries out well-flushing.
The purpose of this utility model is achieved in that sealing of hole is tested in design in packer, seat is honored as a queen and is checked and accepted that the through hole on the spacer ring is communicated with in hole and the cartridge group, look whether pressure descends in the oil pipe, realize that with this function of well-flushing is then finished by the flushing valve structure of the uniqueness that designs in the packer from testing the envelope function.Washing well mainly comprises seven parts from the structure of testing envelope seperated layer water injection packer: promptly seat envelope power section, hermetic unit, test envelope part, lock portion, deblocking part, well-flushing part and prevent the interlayer connected component when stopping annotating.The power section of seat envelope is made up of the two poles of the earth hydraulic cylinder, and first order hydraulic cylinder refers to piston mechanism, and second level hydraulic cylinder is then replaced by flushing valve, and the pressure sum compression packing element of the two generation is realized the seat envelope.Hermetic unit comprises four identical packing elements of size and three spacer rings that are shaped as dovetail protruding-type structure, and two packing elements in the outside are the ebonite tube, and middle two is soft gum tube, plays the effect of protection and sealing jointly.Testing envelope part is made of in test through hole on sealing of hole, the middle spacer ring and packing element group etc. between central tube and the exterior central tube design.Lock portion is made up of lock ring and exterior central tube etc.The deblocking part is made up of deblocking body and lock ring etc.Well-flushing part is made up of the flushing valve of unique design and fluid cylinder etc.Anti-interlayer connected component is made up of two valves when stopping annotating.
Certainly the flushing valve of testing in the envelope seperated layer water injection packer of washing well of the present utility model has double action, compress packing element during the seat envelope under pressure, play fluid cylinder, open flushing valve connection oil jacket annular space and can carry out well-flushing, simplify the structure of well-flushing part individualism in the past, solved the difficult problem that self-test sealing packer in the past can not well-flushing.The packing element group both sealed, and worked the envelope effect of testing again, and seat envelope time has also finished and tested envelope, the dovetail protruding-type structural defence of middle spacer ring packing element, prevent that packer from separating the packing element of being honored as a queen and resetting and cause trouble of lost tool in hole when incomplete.During anti-flushing well, flushing valve is opened, and pressure is 2MPa, and promptly interlayer pressure difference is within 2MPa, even stop annotating, interlayer can not form yet and pour in down a chimney, and can suppress formation sand production to a certain extent to sand output well, prolongs the normal water injection cycle of water injection well.
Washing well of the present utility model test envelope seperated layer water injection packer certainly compared with prior art, solved the difficult problem that self-test sealing packer in the past can not well-flushing, and can finish from testing envelope when having realized the seat envelope, it is reliable to test envelope certainly, well-flushing is simple in structure.
Accompanying drawing 1 is the structural representation of testing envelope seperated layer water injection packer certainly of washing well.
1 given embodiment is further described the utility model below in conjunction with accompanying drawing:
Washing well among the embodiment test certainly envelope seperated layer water injection packer by lock ring 1, deblocking body 2, central tube 3, exterior central tube 4, test sealing of hole 5, spacer ring 6, compression packing element 7, flushing valve 8, overcoat 9, piston 10, seat offset nail 11, two valve 12, top connection 13 and lower contact 14 etc. and form.Upper and lower joint all links to each other with oil pipe.When this packer with tubing string under behind the precalculated position, oil pipe is suppressed 7MPa, cuts off offset nail 11, piston 10 promotes overcoat 9 under the effect of pressure, compression packing element 7 compresses packing element 7 simultaneously and also is subjected to exerting oneself from the pressure of flushing valve 8.This is second effect that flushing valve 8 plays, and first effect is the well-flushing passage.The compression 7 compressed whiles of packing element, spacer ring 6, exterior central tube 4 also move upward thereupon together.When pressure reached 12MPa, compression packing element 7 was adjacent to casing wall, and the front end of exterior central tube 4 enters lock ring 1, finishes locking action, simultaneously central tube 3 test hole on sealing of hole 5 and the exterior central tube 4 and the hole on the spacer ring 6 aligns, form and test the envelope passage.At this moment packer is tested envelope and suppress 15MPa, 5min does not leak, and tests the involution lattice, and packer is finished the seat envelope.Deblocking action: during the upper lifting pipe post, because the frictional force of compression packing element 7 and casing wall, lock ring 1, exterior central tube 4, packing element 7 remain static, and central tube 3, deblocking body 2 move upward with tubing string, when deblocking body 2 advances in the lock ring 1, lock ring 1 is strutted, and the exterior central tube 4 of lock is thrown off mutually with it.Exterior central tube 4 leaves lock ring 1 under the elastic force effect of compression packing element 7, packing element resets, and finishes deblocking.During well-flushing, the water of oil jacket annular space enters through exterior central tube 4 annular space with central tube 3, when pressure reaches 2MPa, pushes flushing valve 8 open, and at this moment water will be walked around compression packing element 7, through outside the hole that puts enter lower end completion well-flushing.The opening pressure that two valves 12 can provide 2MPa for flushing valve 8, the interlayer when preventing to stop annotating is communicated with.
Claims (4)
1, testing certainly of the washing well that uses in a kind of water flooding sealed the seperated layer water injection packer, by seat envelope power section, hermetic unit, test envelope part, lock portion, deblocking part, well-flushing part and when stopping annotating anti-interlayer interconnecting part grade and form, it is characterized in that: the secondary of this packer pressurizes and the flushing valve (8) that can provide the well-flushing passage to carry out well-flushing is housed in the fluid cylinder.
2, testing certainly of washing well according to claim 1 sealed the seperated layer water injection packer, it is characterized in that: this packer designs between central tube (3) and exterior central tube (4) and tests sealing of hole (5), and through hole on this examination Kong Yuzhong spacer ring (6) and compression packing element (7) are formed together from testing sealing mechanism.
3, washing well according to claim 2 is from testing envelope seperated layer water injection packer, and it is characterized in that: in the cartridge (7), the outside is the ebonite tube, and the centre is a soft gum tube, and middle spacer ring (6) is dovetail protruding-type protection structure.
4, according to the described washing well of claim 1 to 3 test envelope seperated layer water injection packer certainly, it is characterized in that: the oriented anti-two-way valve mechanism (12) that interlayer is communicated with when stopping annotating that it provides pressure of design below the flushing valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98239538 CN2360594Y (en) | 1998-12-01 | 1998-12-01 | Self-checking stratified filling packer able to wash well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98239538 CN2360594Y (en) | 1998-12-01 | 1998-12-01 | Self-checking stratified filling packer able to wash well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2360594Y true CN2360594Y (en) | 2000-01-26 |
Family
ID=33986894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98239538 Expired - Fee Related CN2360594Y (en) | 1998-12-01 | 1998-12-01 | Self-checking stratified filling packer able to wash well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2360594Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839939A (en) * | 2012-08-25 | 2012-12-26 | 中国科学院武汉岩土力学研究所 | Supercritical CO2 resistant packer |
| CN102900394A (en) * | 2011-07-25 | 2013-01-30 | 中国石油天然气集团公司 | Packer capable of washing well and examining seal |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
| CN104975820A (en) * | 2015-06-25 | 2015-10-14 | 荆州市赛瑞能源技术有限公司 | Self-seal-examining slip packer |
-
1998
- 1998-12-01 CN CN 98239538 patent/CN2360594Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900394A (en) * | 2011-07-25 | 2013-01-30 | 中国石油天然气集团公司 | Packer capable of washing well and examining seal |
| CN102839939A (en) * | 2012-08-25 | 2012-12-26 | 中国科学院武汉岩土力学研究所 | Supercritical CO2 resistant packer |
| CN102839939B (en) * | 2012-08-25 | 2015-03-04 | 中国科学院武汉岩土力学研究所 | Supercritical CO2 resistant packer |
| 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 |
| CN104975820A (en) * | 2015-06-25 | 2015-10-14 | 荆州市赛瑞能源技术有限公司 | Self-seal-examining slip packer |
| CN104975820B (en) * | 2015-06-25 | 2017-07-11 | 荆州市赛瑞能源技术有限公司 | It is a kind of to test envelope anchor packer certainly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |