CN106351602A - Expanding type differential pressure opening type fine leakage finding and leakage checking packer - Google Patents
Expanding type differential pressure opening type fine leakage finding and leakage checking packer Download PDFInfo
- Publication number
- CN106351602A CN106351602A CN201610955627.1A CN201610955627A CN106351602A CN 106351602 A CN106351602 A CN 106351602A CN 201610955627 A CN201610955627 A CN 201610955627A CN 106351602 A CN106351602 A CN 106351602A
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- Prior art keywords
- omission
- packing element
- leakage
- lower rubber
- look
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- 229920001971 elastomer Polymers 0.000 claims abstract description 59
- 239000005060 rubber Substances 0.000 claims abstract description 59
- 238000012856 packing Methods 0.000 claims description 59
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000003913 materials processing Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000003978 infusion fluid Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Check Valves (AREA)
Abstract
The invention provides an expanding type differential pressure opening type fine leakage finding and leakage checking packer. The expanding type differential pressure opening type fine leakage finding and leakage checking packer comprises an upper rubber sleeve and a lower rubber sleeve, wherein two ends of the upper rubber sleeve are connected with an upper rubber sleeve upper base and an upper rubber sleeve lower base respectively; the two ends of the lower rubber sleeve are connected with a lower rubber sleeve upper base and a lower rubber sleeve lower base respectively; the upper rubber sleeve lower base and the lower rubber sleeve upper base are connected though a check valve body, and the check valve body is provided with a check valve; and an upper slit central pipe is arranged in the upper rubber sleeve, and a lower slit central pipe is arranged in the lower rubber sleeve. By adopting a manner of combining the upper and lower rubber sleeves and the check valve, the aims of accurately determining a layer position, finely judging a leakage point position and easily unpacking setting are realized according to low-differential-pressure setting and a constant distance of the upper and lower rubber sleeves and a high-differential-pressure forward opening function of the check valve; and the problems of an existing old well leakage finding and leakage checking packer (tubular column) of an existing oil-gas well that leakage finding is extensive, a leakage point is easy to miss, performances are not reliable, the unpacking is difficult and the like are solved.
Description
Technical field
The present invention relates to a kind of expanding pressure reduction is opened finely looks for omission of examination leakage packer, it is primarily adapted for use in the old Jing Jing of Oil/gas Well
Cylinder is looked in omission of examination leakage operation.
Background technology
In recent years, Changqing oilfields Oil/gas Well old well well workover business gradually increases, be mainly manifested in old well look for Lou, test Lou, stifled
The aspects such as leakage, shaft deformation, sand washing, salvaging reducer.Because old well produces, the cycle is long, and yield gradually decreases, the old well of great majority
Needs carry out repeating to transform pressure break, and to improve old well yield and recovery ratio, but the early stage repeating to transform seeks to judge pit shaft
Whether there is leakage point, whether pit shaft has deformation, and assessing pit shaft leakage situation is an of paramount importance job.And current, oil
Gas well great majority look for omission of examination leakage packer tubing string all using double envelope single deck tape-recorder packer tubing strings, carry two compression packers, tubing string
Bit freezing easily occurs during above carrying, slips unseals the problems such as difficult, packing element weares and teares, look for leak source to be that comparison is extensive simultaneously, look for leakage
During easy staggered floor position stuck point, lead to the situation missing leak source more it is impossible to accurately judge the whole leak source of pit shaft, thus cannot
There is provided good wellbore conditions to repeating to transform.
For this reason, finely looking for omission of examination leakage demand in order to be able to efficiently meet old well, a kind of expanding pressure reduction of innovative design is opened
Finely look for omission of examination leakage packer.
Content of the invention
The purpose of the present invention be the old well of the existing Oil/gas Well of effectively solving look for the omission of examination leakage packer (tubing string) look for Lou extensive, easy
Miss the problems such as leak source, performance are unreliable, deblocking is difficult, improve and look for omission of examination leakage success rate and its degree that becomes more meticulous, be Oil/gas Well
Old well repeats transformation provides pit shaft decision-making foundation.A kind of expanding pressure reduction that the present invention provides is opened and is finely looked for omission of examination leakage packing
Device, make the old well of Oil/gas Well look for omission of examination leakage packer tubing string only need to connect one this finely look for omission of examination leakage packer it is possible to realize
Accurately card layer position, fine judge leak source position, set the easy target of deblocking.
The technical scheme is that
A kind of expanding pressure reduction is opened and is finely looked for omission of examination leakage packer, and including upper packing element and lower rubber cylinder, described upper packing element two ends are divided
It is not connected with seat under the packing element seat of honour and upper packing element；Described lower rubber cylinder two ends are connected under the lower rubber cylinder seat of honour and lower rubber cylinder
Seat；Connected by unidirectional valve body between seat and the lower rubber cylinder seat of honour under described upper packing element, described unidirectional valve body is provided with unidirectional
Valve；It is provided with slotted base pipe in described upper packing element, in described lower rubber cylinder, be provided with lower slotted base pipe.
Described check valve includes valve seat, spring and valve element, and described spring is located between valve seat and valve element.
Under described lower rubber cylinder, seat lower end is connected with lower contact；It is connected with top connection on the described upper packing element seat of honour.
Described top connection is tightly connected by sealing ring with the upper packing element seat of honour.
Described upper packing element is identical with the structure of lower rubber cylinder, long 300mm, and spacing 1200mm sets pressure reduction 1.0mpa.
The length direction local of described upper slotted base pipe and lower slotted base pipe all has slot, the long 1.0mm of its slot,
Wide 0.5mm.
Described upper slotted base pipe and lower slotted base pipe are all using 35crmo materials processing, hardness hb197 ~ 235.
Described upper packing element is identical with lower rubber cylinder structure, all using the oil resistant hydrogenated nitrile-butadiene rubber of shoulder protection.
Described check valve adopts stainless steel material, bore dn06-32, Opening pressure 4.0mpa.
The button-type of described top connection and lower contact is 2-7/8 " eue.
The invention has the benefit that
The present invention adopts packing element and lower rubber cylinder and the combined mode of check valve in structure design, according to upper packing element and lower rubber cylinder
Between constant length and check valve forward direction open function it is achieved that accurate card layer position, fine judging leak source position, easily set deblocking
Purpose, solve the old well of existing Oil/gas Well look for the omission of examination leakage packer (tubing string) look for Lou extensive, easily miss leak source, performance can not
The problems such as lean on, unseal difficulty, improves oil gas well shaft and looks for omission of examination leakage success rate and its integrity to become more meticulous assessment efficiency.Structure
Simply, easy to use, application effect substantially, looks for omission of examination leakage success rate high, practical.
It is further detailed below with reference to accompanying drawing.
Brief description
Fig. 1 is that omission of examination leakage packer schematic diagram is finely looked in a kind of expanding pressure reduction unlatching.
Fig. 2 is check valve schematic diagram.
Reference is as follows: 1- top connection；2- sealing ring；The 3- upper packing element seat of honour；The upper slotted base pipe of 4-；The upper packing element of 5-；
Seat under the upper packing element of 6-；The unidirectional valve body of 7-；8- check valve；The 9- lower rubber cylinder seat of honour；Slotted base pipe under 10-；11- lower rubber cylinder；12-
Seat under lower rubber cylinder；13- lower contact；14- valve seat；15- spring；16- valve element.
Specific embodiment
Embodiment 1:
The purpose of the present invention be the old well of the existing Oil/gas Well of effectively solving look for the omission of examination leakage packer (tubing string) look for Lou extensive, easily miss
The problems such as leak source, performance are unreliable, deblocking is difficult, improves and looks for omission of examination leakage success rate and its degree that becomes more meticulous, be the old well of Oil/gas Well
Repeating transformation provides pit shaft decision-making foundation.A kind of expanding pressure reduction as shown in Figure 1 that the present invention provides is opened and is finely looked for the omission of examination
Leakage packer, make the old well of Oil/gas Well look for omission of examination leakage packer tubing string only need to connect one this finely look for omission of examination leakage packer so that it may
To realize accurate card layer position, fine judgement leak source position, to set the easy target of deblocking.
A kind of expanding pressure reduction is opened and is finely looked for omission of examination leakage packer, including upper packing element 5 and lower rubber cylinder 11, described upper packing element
5 two ends are connected to seat 6 under the packing element seat of honour 3 and upper packing element；Described lower rubber cylinder 11 two ends are connected to the lower rubber cylinder seat of honour 9
With seat 12 under lower rubber cylinder；Connected by unidirectional valve body 7 between seat 6 and the lower rubber cylinder seat of honour 9 under described upper packing element, described check valve
Body 7 is provided with check valve 8；It is provided with slotted base pipe 4 in described upper packing element 5, be provided with lower slot in described lower rubber cylinder 11
Heart pipe 10.
The present invention is based on constant length and the positive open function of check valve 8 between upper packing element 5 and lower rubber cylinder 11, and liquid is along pipe
Post and upper slotted base pipe flow at check valve 8, continue infusion liquid, when upper and lower slotted base pipe fluid pressure exceedes sleeve pipe
Annulus fluid pressure, and inside and outside differential pressure rises to after upper and lower packing element sets pressure reduction 1.0mpa, upper and lower packing element could set simultaneously,
Block casing annulus position, form limited airtight casing annulus；When upper and lower slotted base pipe and limited airtight casing annulus liquid
When pressure differential is more than 4mpa, check valve 8 is positive to be opened, and liquid enters limited airtight casing annulus region from check valve 8, continues to carry
High fluid injection discharge capacity simultaneously keeps stable: if now well head pump pressure is decreased obviously, it is intersegmental that this illustrates that the upper and lower packing element of this packer sets
Leakage in sleeve pipe, is leak source position at this well depth；If now well head pump pressure does not decline, rise on the contrary, this illustrates this envelope
Set intersegmental sleeve pipe every the upper and lower packing element of device intact, do not leak.Principle is it can be determined that the upper and lower packing element of this packer sets accordingly
Whether intersegmental sleeve pipe is complete, thus realize becoming more meticulous looking for omission of examination leakage operation.
The present invention adopts packing element 5 and lower rubber cylinder 11 and the combined mode of check valve in structure design, according to upper packing element 5
With 11 constant length of lower rubber cylinder and check valve forward direction open function it is achieved that accurate card layer position, fine judging leak source position, appearance
Easily set the purpose of deblocking, solve the old well of existing Oil/gas Well look for the omission of examination leakage packer (tubing string) look for Lou extensive, easily miss leakage
The problems such as point, performance are unreliable, deblocking is difficult, improves oil gas well shaft and looks for omission of examination leakage success rate and its integrity to become more meticulous and comment
Estimate efficiency.Structure is simple, easy to use, and application effect substantially, looks for omission of examination leakage success rate high, practical.
Embodiment 2:
On the basis of embodiment 1, as shown in Fig. 2 described check valve 8 includes valve seat 14, spring 15 and valve in the present embodiment
Core 16, described spring 15 is located between valve seat 14 and valve element 16.
Under described lower rubber cylinder, seat 12 lower end is connected with lower contact 13；It is connected with top connection 1 on the described upper packing element seat of honour 3.
Described top connection 1 is tightly connected by sealing ring 2 with the upper packing element seat of honour 3.
Described upper packing element 5 is identical with the structure of lower rubber cylinder 11, long 300mm, and spacing 1200mm sets pressure reduction 1.0mpa.
The length direction local of described upper slotted base pipe 4 and lower slotted base pipe 10 all has slot, and its slot is long
1.0mm, wide 0.5mm.
Described upper slotted base pipe 4 and lower slotted base pipe 10 are all using 35crmo materials processing, hardness hb197 ~ 235.
Described upper packing element 5 is identical with lower rubber cylinder 11 structure, all using the oil resistant hydrogenated nitrile-butadiene rubber of shoulder protection.
Described check valve 8 adopts stainless steel material, bore dn06-32, Opening pressure 4.0mpa.
The button-type of described top connection 1 and lower contact 13 is 2-7/8 " eue.
This packer length 2680mm providing in the present invention, steel body maximum outside diameter 118mm, interior latus rectum 56mm, upper and lower
The long 300mm of packing element, spacing 1200mm, set pressure reduction 1.0mpa, check valve 8 starting differential pressure 4.0mpa, upper and lower slotted base pipe office
Portion's length direction slot long 1.0mm, wide 0.5mm, upper and lower joint button-type is 2-7/8 " eue.Described upper and lower slotted base pipe adopts
35crmo materials processing, thermally treated hb197 ~ 235, and carry out slot hole in focal length direction using line cutting technology, it is
Packing element sets offer liquid feed channel；Upper and lower packing element adopts the oil resistant hydrogenated nitrile-butadiene rubber (hnbr) of shoulder protection, has very
High high temperature resistant, anticorrosive, wear-resisting, anti-shear performance；Check valve 8 adopts stainless steel material, bore dn06-32, Opening pressure
4.0mpa；During processing and manufacturing, slotted base pipe, check valve 8 etc. are not allow for the defects such as crackle, pore.
Under unidirectional valve body 7 in the present invention and upper packing element, seat 6, the lower rubber cylinder seat of honour 9, upper and lower slotted base pipe pass through screw thread
Connect.
Check valve 8 in the present invention is threadeded by the valve seat in check valve 8 with unidirectional valve body 7.
The connected mode of the present invention is threaded, in order to dismantling, changing and maintain.
The application mode of the present invention is:
1., before the old well shaft of Oil/gas Well carries out looking for omission of examination leakage operation first, should have been predicted whether according to early stage pit shaft working condition
Leak source and the position of leak source, probably provide a well depth position.
2., according to looking for omission of examination leakage packer tubular column structure figure, this expanding pressure reduction is opened and finely looks for omission of examination leakage packer
It is connected to and look for the omission of examination leakage corresponding position of packer tubing string.
3. complete above-mentioned look for omission of examination leakage packer tubing string to connect after, this is looked for entering in advance under omission of examination leakage packer tubing string
The well depth position of prediction.
4. after putting in place under tubing string, infusion liquid in tubing string, liquid reaches this along tubing string and finely looks for omission of examination leakage packer
At upper slotted base pipe 4 and lower slotted base pipe 10 slot hole and check valve 8, because upper packing element 5 and lower rubber cylinder 11 set pressure reduction
Less than check valve starting differential pressure, so liquid enters slotted base pipe outer wall and upper packing element 5 and lower rubber cylinder 11 inwall from slot hole
Between annular region when, when inside and outside differential pressure is more than 1.0mpa, upper packing element 5 and lower rubber cylinder 11 initially set；With infusion liquid
The increase of body discharge capacity, in upper slotted base pipe 4, fluid pressure raises, when exceeding upper packing element 5 and lower rubber cylinder 11 sets a section sleeve ring
After empty fluid pressure 4.0mpa, check valve 8 is positive to be opened, and liquid packing element 5 and lower rubber cylinder 11 from check valve 8 enters set section
Between limited airtight casing annulus region.
5. continue to improve infusion discharge capacity and keep stable, if now well head pump pressure is decreased obviously, this illustrates that this is finely looked for leakage
Test Lou on packer packing element 5 and lower rubber cylinder 11 set intersegmental sleeve pipe and leakage occur, be leak source position at this well depth；If now well
Mouth pump pressure does not decline, and rises on the contrary, and this illustrates that this finely looks for packing element 5 and lower rubber cylinder 11 on omission of examination leakage packer to set intersegmental sleeve pipe
Intact, do not leak.Judge whether this finely looks for packing element 5 and lower rubber cylinder 11 on omission of examination leakage packer to set intersegmental sleeve pipe complete accordingly
Whole, pit shaft looks for omission of examination leakage operation, and whether success is effective.
6. complete this prediction well depth position wellbore casing look for the omission of examination leakage operation after, if sleeve pipe does not leak, termination of pumping is let out
Pressure, this finely looks for packing element 5 and lower rubber cylinder 11 on omission of examination leakage packer to unseal, upper lifting pipe post 1 ~ 2m.
7. then according to 4,5 two steps carry out other shaft locations and look for omission of examination leakage operation, until completing all of pit shaft design
Look for omission of examination blind hole depth position.
8. complete after the old well shaft of Oil/gas Well looks for omission of examination leakage all to work, termination of pumping pressure release, acts this and finely looks for omission of examination leakage envelope
Every device tubing string, dismantle this in time and finely look for omission of examination leakage packer, check that this finely looks for omission of examination leakage packing element, check valve 8 feelings
Condition, maintains or changes this and finely look for omission of examination leakage packer, subsequently to look for omission of examination leakage operation to use again.
Claims (10)
1. a kind of expanding pressure reduction open finely look for omission of examination leakage packer it is characterised in that: packing element (5) and lower rubber cylinder in inclusion
(11), described upper packing element (5) two ends are connected to seat (6) under the packing element seat of honour (3) and upper packing element；Described lower rubber cylinder (11) two
End is connected to seat (12) under the lower rubber cylinder seat of honour (9) and lower rubber cylinder；Under described upper packing element seat (6) and the lower rubber cylinder seat of honour (9) it
Between connected by unidirectional valve body (7), described unidirectional valve body (7) is provided with check valve (8)；It is provided with described upper packing element (5)
Upper slotted base pipe (4), is provided with lower slotted base pipe (10) in described lower rubber cylinder (11).
2. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
Check valve (8) includes valve seat (14), spring (15) and valve element (16), and described spring (15) is located at valve seat (14) and valve element (16)
Between.
3. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
Lower rubber cylinder under seat (12) lower end be connected with lower contact (13)；It is connected with top connection (1) on the described upper packing element seat of honour (3).
4. a kind of expanding pressure reduction according to claim 3 open finely look for omission of examination leakage packer it is characterised in that: described
Top connection (1) is tightly connected by sealing ring (2) with the upper packing element seat of honour (3).
5. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
Upper packing element (5) identical with the structure of lower rubber cylinder (11), long 300mm, spacing 1200mm, set pressure reduction 1.0mpa.
6. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
The length direction local of upper slotted base pipe (4) and lower slotted base pipe (10) all has slot, and the long 1.0mm of its slot is wide
0.5mm.
7. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
Upper slotted base pipe (4) and lower slotted base pipe (10) are all using 35crmo materials processing, hardness hb197 ~ 235.
8. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
Upper packing element (5) identical with lower rubber cylinder (11) structure, all using shoulder protection oil resistant hydrogenated nitrile-butadiene rubber.
9. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: described
Check valve (8) adopts stainless steel material, bore dn06-32, Opening pressure 4.0mpa.
10. a kind of expanding pressure reduction according to claim 1 open finely look for omission of examination leakage packer it is characterised in that: institute
State top connection (1) and the button-type of lower contact (13) is 2-7/8 " eue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610955627.1A CN106351602A (en) | 2016-10-27 | 2016-10-27 | Expanding type differential pressure opening type fine leakage finding and leakage checking packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610955627.1A CN106351602A (en) | 2016-10-27 | 2016-10-27 | Expanding type differential pressure opening type fine leakage finding and leakage checking packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106351602A true CN106351602A (en) | 2017-01-25 |
Family
ID=57863568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610955627.1A Pending CN106351602A (en) | 2016-10-27 | 2016-10-27 | Expanding type differential pressure opening type fine leakage finding and leakage checking packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106351602A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178363A (en) * | 2017-05-26 | 2017-09-19 | 中国石油天然气股份有限公司 | Leak-finding pipe string and its leak-finding technology in casing variable well |
| CN107313767A (en) * | 2017-05-26 | 2017-11-03 | 中国石油天然气股份有限公司 | Leak-finding pipe string and its leak-finding process |
| CN110454113A (en) * | 2019-08-28 | 2019-11-15 | 库尔勒中油能源技术服务有限公司 | It is a kind of to be easy to fixed WSR sand control packer |
| CN116291300A (en) * | 2023-03-15 | 2023-06-23 | 深圳市南海石油经济发展有限公司 | A leak-finding and plugging expansion packer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110454113A (en) * | 2019-08-28 | 2019-11-15 | 库尔勒中油能源技术服务有限公司 | It is a kind of to be easy to fixed WSR sand control packer |
| CN110454113B (en) * | 2019-08-28 | 2024-03-22 | 库尔勒中油能源技术服务有限公司 | WSR sand control packer easy to fix |
| CN116291300A (en) * | 2023-03-15 | 2023-06-23 | 深圳市南海石油经济发展有限公司 | A leak-finding and plugging expansion packer |
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