CN107605424A - From compression high temperature downhole packer - Google Patents
From compression high temperature downhole packer Download PDFInfo
- Publication number
- CN107605424A CN107605424A CN201710976131.7A CN201710976131A CN107605424A CN 107605424 A CN107605424 A CN 107605424A CN 201710976131 A CN201710976131 A CN 201710976131A CN 107605424 A CN107605424 A CN 107605424A
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- ring
- packing element
- piston
- outer barrel
- high temperature
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Abstract
A kind of compression high temperature downhole packer certainly, including：Setting mechanism in tubing string, the sealing mechanism in setting mechanism, the fixed mechanism on sealing mechanism, wherein, setting mechanism includes：One central tube, the body head being connected with central tube, the interior barrel and an external barrel being connected with body head, the plunger shaft that inner cylinder is formed with outer barrel are built-in with piston, high-temperature seal ring are installed respectively in the inside and outside seal groove of piston；The lower end of outer barrel is provided with the shoulder for limiting piston displacement；Outer barrel is connected with spacing ring, and the lower end of outer barrel is provided with tapered end face, and the tapered end face forms an annular space with spacing ring；Lock tube is installed in the annular space that inner cylinder is formed with outer barrel, the lock tube contacts with piston lower surface, promotes lock tube to move down by piston movement.The present invention is solved after thermal production well is setting, is influenceed by temperature change, and causes sealing mechanism Problem of Failure；It the technical problem such as can not unseal after also solving fixed mechanism and can not fixing and be setting.
Description
Technical field
The present invention relates to packer, more particularly to a kind of for insulating in the producing well flow string such as oil well, gas well, oil pipe
The compression high temperature downhole packer certainly in space between sleeve pipe.
Background technology
At present, packer is widely used in the mines such as drilling well, well cementation, production of hydrocarbons well, is applied especially in producing well.It
It is a kind of downhole packing instrument of reliable operation, such packer must possess production passage, exhaust passage and tiny pipeline
Passage lanes.
Existing packer is mainly made up of controlling organization, retaining mechanism, sealing mechanism and fixed mechanism etc..Control machine
Structure is mainly used in the setting of packer and deblocking, different according to setting mode, and packer is broadly divided into mechanical setting and external force
It is setting.Retaining mechanism is mainly used in after the completion of packer set, in the case of controling power is removed, sealing mechanism and fixed mechanism according to
Old normal work.Sealing mechanism is the primary clustering of packer, is mainly included：Packing element, spacer ring etc., its main function are and sleeve pipe
Sealing, isolate packer top and the bottom.Fixed mechanism is mainly relatively fixed position between packer and sleeve pipe, fixed form master
There are tail pipe support, one-way slip, suspension, bi-directional slip etc..Because existing high temperature downhole packer is in high/low temperature alternation shape
Under state, elastomeric material dilation amount is larger, causes downhole packer the problems such as can not sealing occur；And due to being sealed under high temperature well
It is split-type fixed mechanism every device, the problems such as fixing loosely is easily caused in fixation procedure；Adopted to producing wells such as oil well, gas wells
Oil brings certain potential safety hazard.
The content of the invention
It is a primary object of the present invention to overcome disadvantages mentioned above existing for prior art, and provide a kind of from compression high temperature well
Lower packet, it is not only solved after thermal production well is setting, is influenceed by temperature change, and causes sealing mechanism Problem of Failure,
Greatly improve the reliability of work；Moreover, also solving the technical problem such as can not unseal after fixed mechanism can not be fixed and be setting；
Operating efficiency is improved, has saved production cost, avoids the potential safety hazard during the producing wells such as oil well, gas well recover the oil.
The purpose of the present invention is realized by following technical scheme：
A kind of compression high temperature downhole packer certainly, it is characterised in that：Including：Setting mechanism in tubing string, installation
Sealing mechanism on present sealing mechanism, the fixed mechanism on sealing mechanism, wherein, setting mechanism includes：One central tube,
The body head being connected with central tube, the interior barrel and an external barrel being connected with body head, the plunger shaft that inner cylinder is formed with outer barrel are built-in with work
Fill in, high-temperature seal ring is installed respectively in the inside and outside seal groove of piston；The lower end of outer barrel is provided with the shoulder for limiting piston displacement,
To limit high temperature packing element degree of the compressed distortion；Outer barrel is connected with spacing ring, and the lower end of outer barrel is provided with tapered end face, the tapered end face
An annular space is formed with spacing ring, for fixing lock ring；Lock tube is installed in the annular space that inner cylinder is formed with outer barrel, the lock
Set contacts with piston lower surface, promotes lock tube to move down by piston movement；
Sealing mechanism includes：The shearing ring that is connected with outer barrel lower end, the several disc springs for being arranged on shearing ring lower end, work as packing element
When dilation changes, disc spring gives packing element pressure all the time, to keep packing element sealing property；
Fixed mechanism includes：The conical ring being connected with packing element axle lower end, the lower contact being connected with inner cylinder lower end, wherein, under connect
The upper end of head and the lower end of slips connect.
The appearance disc of the lock tube is machined with unidirectional form of thread, and the interior table disc of lock ring is machined with unidirectional ridge
Type, after lock tube is connected with lock ring, lock tube is set to move single file downwards, otherwise move up then high resistance.
The body head is connected with liquid controling pipe line, and liquid controling pipe line is respectively inwards in the plunger shaft between cylinder, outer barrel and piston
Pressurization, to promote piston to move down.
The outside of the inner cylinder is equipped with pressure ring, and pressure ring contacts with disc spring lower surface；Shoulder is provided with inside the upper end of pressure ring；Platform
Shoulder forms a groove with pressure ring, and the groove is built-in with packing element；And pressure ring and inner cylinder form an annular space, built in the annular space
There is a packing element axle, packing element axle has certain spacing distance with pressure ring shoulder, during ensureing that pressure ring moves down, packing element is first sealed it
Afterwards, then slips is allowed to move.
The slips is integral barrel shape, and the upper end of slips is provided with several uniform open slots, and the bottom of conical ring is provided with taper
Face, when conical ring moves down, slips is circumferentially propped up, slips is engaged fixation with sleeve pipe.
Beneficial effects of the present invention：
(1) present invention efficiently solves downhole packer it is setting after, due to temperature change lead to not sealing ask
Topic；
(2) slips of fixed mechanism of the present invention is annulus overall structure, and the structure makes slips stress in setting procedure equal
It is even, during deblocking, can also it slips is effectively unsealed.
(3) fixed mechanism of the present invention can efficiently solve packer, and seat again occurs during upper lifting pipe post deblocking
Envelope problem.
(4) present invention carries out setting control using liquid controling pipe line, has more relative to setting modes such as current handling tubing strings
High reliability, if after setting completion, the setting failure by external action can be suppressed setting again, thus can
Realize and simplify underground work operation, improve operating efficiency, greatly save production cost.
Brief description of the drawings
Fig. 1 is structure schematic side view of the present invention.
Fig. 2 is schematic diagram when structure of the present invention is setting.
Fig. 3 is the setting completion schematic diagram of structure of the present invention.
Fig. 4 is slips structural representation of the present invention.
Major Symbol explanation in figure：
1- central tubes；2- body heads；3- inner cylinders；4- pistons；5- lock tubes；6- lock rings；7- spacing rings；The packing elements of 8- first are cut
Nail；9- shearing rings；10- outer barrels；11- disc springs；12- pressure rings；13- the second packing element shear pins；14- packing elements；15- packing element axles；16- is bored
Ring；17- slips；18- lower contacts；19- liquid controling pipe lines；20- seal nipples；21- the first high temperature O-rings；The high temperature of 22- second is O-shaped
Circle.
Embodiment
As shown in Fig. 1-Fig. 4, the present invention includes：It is setting mechanism in tubing string, close in setting mechanism
Sealing mechanism, the fixed mechanism on sealing mechanism, wherein, setting mechanism includes：Central tube 1, it is connected through a screw thread mode
The body that is connected with central tube 1 is first 2, the inner cylinder 3 and outer barrel 10 that mode is connected are connected through a screw thread with body first 2, inner cylinder 3 with it is outer
The plunger shafts that cylinder 10 is formed are built-in with piston 4, install the first high temperature O-ring 21 and the in the inside and outside seal groove of piston 4 respectively
Two high temperature O-rings 22 are increasing interior or exterior space sealing property.
The lower end of above-mentioned outer barrel 10 is provided with shoulder, for limiting the displacement of piston 4, so as to limit the compression of high temperature packing element
Deformation extent, ensure sealing property；Outer barrel 10 is connected through a screw thread mode and is connected with spacing ring 7, and the lower end of outer barrel 10 is provided with cone
Shape end face, the tapered end face forms an annular space with spacing ring 7, for fixing lock ring 6.The ring that inner cylinder 3 is formed with outer barrel 10
Lock tube 5 is installed, lock tube 5 contacts with piston lower surface, promotes lock tube 5 to move down by piston movement in shape space.
The appearance disc of above-mentioned lock tube 5 is machined with unidirectional form of thread, and the interior table disc of lock ring 6 is machined with unidirectional ridge
Type, after lock tube 5 is connected with lock ring 6, lock tube 5 is moved single file downwards, otherwise move up then high resistance, this
Sample, after setting mechanism pressure removal, high temperature packing element and slips can still keep sealing fixed performance.
Above-mentioned body first 2 is connected by seal nipple 20 with liquid controling pipe line 19, and liquid controling pipe line 19 can be to inner cylinder 3, outer barrel 10
Pressurizeed in plunger shaft between piston, to promote piston to move down, and seal nipple 20 be used for ensure liquid controling pipe line 19 with
The sealing property of body first 2, so as to ensure that liquid controling pipe line 19 is not revealed during suppressing.
As shown in figure 1, the end face of body first 2 is provided with several through holes (the present embodiment is 3), effect is respectively：One is worn
More production flow line A and steam vent a B, the through hole C of a connection control pressure.
Sealing mechanism includes：The shearing ring 9 that mode is connected is connected through a screw thread with the lower end of outer barrel 10, the circumference of shearing ring 9 is equal
Two screwed holes of even distribution, are fixed by the first packing element shear pin 8 with outer barrel 10.The lower end of shearing ring 9 is equipped with several disc springs
11, the main function of disc spring 11 is：When the dilation of packing element 14 changes, disc spring 11 gives packing element pressure all the time, to keep glue
Cylinder sealing property.
The outside of above-mentioned inner cylinder 3 is equipped with pressure ring 12, and pressure ring 12 contacts with disc spring lower surface.It is provided with inside the upper end of pressure ring 12
Shoulder, and pressure ring 12 forms an annular space with inner cylinder 3, the annular space is built-in with packing element axle 15, packing element axle 15 and pressure ring platform
Shoulder has certain spacing distance, during ensureing that pressure ring 12 moves down, packing element is first sealed and then allows slips to move；
The above-mentioned upper end of packing element axle 15 is evenly distributed in several screwed holes (the present embodiment is 4), passes through the second packing element shear pin
13 fix with pressure ring 12；The lower end of packing element axle 15 is provided with a shoulder, and the shoulder forms a groove with pressure ring 12, and the groove is built-in with
Packing element 14.
Fixed mechanism includes：Conical ring 16 that mode is connected is connected through a screw thread with the lower end of packing element axle 15, is led to the lower end of inner cylinder 3
The lower contact 18 of thread connecting mode connection is crossed, wherein, screw thread is provided with outside the upper end of lower contact 18, the lower end of slips 17 passes through
Screw thread is connected with the upper end of lower contact 18.
Above-mentioned slips 17 is integral barrel shape, and the upper end of slips 17 is provided with several uniform open slots (the present embodiment is 8),
The bottom of conical ring 16 is provided with taper surface, when conical ring 16 moves down, slips 17 is circumferentially propped up, slips 17 is engaged with sleeve pipe
It is fixed.
As shown in Fig. 2 the setting procedure of the present invention is：Tubing string G.I.H setting position, is pressurizeed by liquid controling pipe line 19,
Pressure enters plunger shaft by the pressure controling hole of body first 2 and promotes piston 4 to move down, and piston 4 is promoted by lock tube 5 and sheared
Ring 9, when pressure is to setting value, the first packing element shear pin 8 is cut, and shearing ring 9 moves down compression disc spring 11, and disc spring 11 starts
Accumulation of energy simultaneously pushes down on pressure ring 12, and pressure ring 12 is downward, and the-the second packing element shear pin 13 is cut, and starts to compress high temperature packing element 14, high
Warm packing element 14 moves down, and promotes conical ring 16 by packing element axle 15, and conical ring 16 makes slips 17 setting by the conical surface, when being moved to
When a certain amount of, slips 17 is fixed in casing-contact, is continued to suppress high temperature packing element 14 and is continued to seal between expansion and sleeve pipe, now seat
Envelope is completed, as shown in Figure 3.
The present invention high/low temperature alternation process be：In the packer course of work, cause because well temperature reduces
Packing element 14 shrinks gap between sleeve pipe, also, causes 17 setting power of slips to reduce, and the elastic force of disc spring 11 is constant, therefore, dish
Spring 11 pushes down on pressure ring 12, high temperature packing element 14 and slips 17 is in setting state.When the temperature increases, high temperature packing element 14 is swollen
Swollen compression disc spring 11 upwards, makes the accumulation of energy of disc spring 11, ensures there are volume expansions after high temperature packing element 14 is heated, so as to ensure that high-temp glue
The integrality of cylinder 14.Therefore, in temperature changing process, high temperature packing element 14 and slips 17 in well is made to be in setting state all the time.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, it is all
It is any simple modification, equivalent change and modification made according to the technical spirit of the present invention to above example, still falls within
In the range of technical solution of the present invention.
Claims (5)
- It is 1. a kind of from compression high temperature downhole packer, it is characterised in that：Including：Setting mechanism in tubing string, it is arranged on Sealing mechanism in setting mechanism, the fixed mechanism on sealing mechanism, wherein, setting mechanism includes：One central tube, with The body head of central tube connection, the interior barrel and an external barrel being connected with body head, the plunger shaft that inner cylinder is formed with outer barrel are built-in with piston, High-temperature seal ring is installed respectively in the inside and outside seal groove of piston；The lower end of outer barrel is provided with the shoulder for limiting piston displacement, with Limit high temperature packing element degree of the compressed distortion；Outer barrel is connected with spacing ring, and the lower end of outer barrel is provided with tapered end face, the tapered end face with Spacing ring forms an annular space, for fixing lock ring；Lock tube is installed in the annular space that inner cylinder is formed with outer barrel, the lock tube Contacted with piston lower surface, promote lock tube to move down by piston movement；Sealing mechanism includes：The shearing ring that is connected with outer barrel lower end, the several disc springs for being arranged on shearing ring lower end, when packing element expands During contraction change, disc spring gives packing element pressure all the time, to keep packing element sealing property；Fixed mechanism includes：The conical ring being connected with packing element axle lower end, the lower contact being connected with inner cylinder lower end, wherein, lower contact Upper end and the lower end of slips connect.
- It is 2. according to claim 1 from compression high temperature downhole packer, it is characterised in that：The appearance disc of the lock tube adds Work has unidirectional form of thread, and the interior table disc of lock ring is machined with unidirectional form of thread, after lock tube is connected with lock ring, makes lock tube It can only move single file downwards, otherwise move up then high resistance.
- It is 3. according to claim 1 from compression high temperature downhole packer, it is characterised in that：The body head and liquid controling pipe line Connection, liquid controling pipe line pressurizes in the plunger shaft between cylinder, outer barrel and piston respectively inwards, to promote piston to move down.
- It is 4. according to claim 1 from compression high temperature downhole packer, it is characterised in that：The outside of the inner cylinder is equipped with pressure Ring, pressure ring contact with disc spring lower surface；Shoulder is provided with inside the upper end of pressure ring；Shoulder and pressure ring form a groove, in the groove It is equipped with packing element；And pressure ring forms an annular space with inner cylinder, the annular space is built-in with packing element axle, and packing element axle has with pressure ring shoulder Certain spacing distance, during ensureing that pressure ring moves down, packing element is first sealed and then allow slips to move.
- It is 5. according to claim 1 from compression high temperature downhole packer, it is characterised in that：The slips is integral barrel Shape, the upper end of slips are provided with several uniform open slots, and the bottom of conical ring is provided with taper surface, when conical ring moves down, by slips Circumferentially prop up, slips is engaged fixation with sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710976131.7A CN107605424A (en) | 2017-10-19 | 2017-10-19 | From compression high temperature downhole packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710976131.7A CN107605424A (en) | 2017-10-19 | 2017-10-19 | From compression high temperature downhole packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107605424A true CN107605424A (en) | 2018-01-19 |
Family
ID=61078787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710976131.7A Pending CN107605424A (en) | 2017-10-19 | 2017-10-19 | From compression high temperature downhole packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107605424A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282260A (en) * | 2018-10-30 | 2019-01-29 | 江苏中圣压力容器装备制造有限公司 | A kind of waste heat of coke oven crude gas recyclable device and system |
| CN110306948A (en) * | 2019-06-11 | 2019-10-08 | 中国石油大学(北京) | Packer |
| CN112855105A (en) * | 2021-01-20 | 2021-05-28 | 长江大学 | Underground sealing and pressing integrated electric explosion pulse fracturing device |
| CN113914812A (en) * | 2020-07-10 | 2022-01-11 | 中国海洋石油集团有限公司 | High-temperature-resistant dual-sealing packer and using method thereof |
| CN115506748A (en) * | 2022-09-26 | 2022-12-23 | 中海石油(中国)有限公司 | Packer setting energy storage device and using method thereof |
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| CN2651429Y (en) * | 2003-11-04 | 2004-10-27 | 中国石化胜利油田有限公司采油工艺研究院 | Compensative hot producing packer |
| US7967077B2 (en) * | 2008-07-17 | 2011-06-28 | Halliburton Energy Services, Inc. | Interventionless set packer and setting method for same |
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| CN104265230A (en) * | 2014-07-17 | 2015-01-07 | 阜宁县宏达石化机械有限公司 | Compensation type sealing mechanism of underground packer and bridge plug for oil field |
| CN205225166U (en) * | 2015-12-10 | 2016-05-11 | 中国海洋石油总公司 | Self compensating formula high temperature thermal insulation packer |
| CN105804687A (en) * | 2016-05-13 | 2016-07-27 | 中国石油化工股份有限公司 | Vibration-resistant and anti-crawling compression packer |
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Patent Citations (6)
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| CN2651429Y (en) * | 2003-11-04 | 2004-10-27 | 中国石化胜利油田有限公司采油工艺研究院 | Compensative hot producing packer |
| US7967077B2 (en) * | 2008-07-17 | 2011-06-28 | Halliburton Energy Services, Inc. | Interventionless set packer and setting method for same |
| CN202990960U (en) * | 2012-12-27 | 2013-06-12 | 阜新驰宇石油机械有限公司 | Drillable bridge plug |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282260A (en) * | 2018-10-30 | 2019-01-29 | 江苏中圣压力容器装备制造有限公司 | A kind of waste heat of coke oven crude gas recyclable device and system |
| CN109282260B (en) * | 2018-10-30 | 2023-12-08 | 江苏中圣压力容器装备制造有限公司 | Raw coke oven gas waste heat recovery device and system |
| CN110306948A (en) * | 2019-06-11 | 2019-10-08 | 中国石油大学(北京) | Packer |
| CN110306948B (en) * | 2019-06-11 | 2020-08-28 | 中国石油大学(北京) | Packer (CN) |
| CN113914812A (en) * | 2020-07-10 | 2022-01-11 | 中国海洋石油集团有限公司 | High-temperature-resistant dual-sealing packer and using method thereof |
| CN113914812B (en) * | 2020-07-10 | 2023-11-24 | 中国海洋石油集团有限公司 | High-temperature-resistant double-sealing packer and application method thereof |
| CN112855105A (en) * | 2021-01-20 | 2021-05-28 | 长江大学 | Underground sealing and pressing integrated electric explosion pulse fracturing device |
| CN115506748A (en) * | 2022-09-26 | 2022-12-23 | 中海石油(中国)有限公司 | Packer setting energy storage device and using method thereof |
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Application publication date: 20180119 |
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| RJ01 | Rejection of invention patent application after publication |