CN208310736U - Water injection packer - Google Patents
Water injection packer Download PDFInfo
- Publication number
- CN208310736U CN208310736U CN201820924144.XU CN201820924144U CN208310736U CN 208310736 U CN208310736 U CN 208310736U CN 201820924144 U CN201820924144 U CN 201820924144U CN 208310736 U CN208310736 U CN 208310736U
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- Prior art keywords
- piston
- central tube
- water injection
- packing element
- ring
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Abstract
The utility model relates to a kind of water injection packers.Water injection packer includes central tube and the packing element that is set on central tube, the lower end of packing element, which is fixed with, sets piston, the outer peripheral surface of the central tube and one of them set in the inner peripheral surface of piston are equipped with retaining groove, another is equipped with the elastic locking structure for protruding into retaining groove during central tube uplink and being used to set piston and central tube locking with retaining groove block.The water injection packer solution of the utility model is honored as a queen, during central tube uplink, elastic locking structure stretches in retaining groove and makes central tube and set piston locking, it is with the common uplink of central tube and opposing stationary with packing element to set piston, avoid the steel band set in piston stroking upward extruding packing element, to solve the problems, such as steel band accumulation, packer use reliability is enhanced.
Description
Technical field
The utility model relates to a kind of water injection packers.
Background technique
Currently, being directed to low hole Oil in Super-low Permeability Reservoirs, fracturing production is mostly used, in order to save the investment of petroleum exploration & development,
The economic benefit of oil field development is improved, slim-hole prefabricated separate stratum fracfturing technology, but present tube column sectional pressure break are generally used
Complete well uses 4 〃 casings (internal diameter 100.5mm), and sliding sleeve bores interior latus rectum 90-92mm after milling, forms casing part " necking down " section,
Preset tubing string has multistage sliding sleeve simultaneously, bores residual steps after milling, forms multiple sleeve shrinking diameter sections, seriously affected the dispensing in later period
Process implementing.Implement to meet the slim-hole water injection technology of prefabricated cased hole completion, a kind of mating minor diameter that meets is needed to seal
Big wellbore, while recycling the good minor diameter water filling packing of deblocking effect.
The Chinese patent CN204941440U(day for announcing is on 01 06th, 2016) a kind of pressure maintaining Packer for blocking water is disclosed, it protects
Pressure piston and piston seat are sealed using sealing ring and the sealing mutually matched mode of mating surface, in this way after being set,
Between pressure maintaining piston and piston seat sealing will be realized in a manner of rigid-soft face contact, when the removing seal for packer, upper lifting pipe post,
Since expansion packing element and casing wall are there are frictional force, in succession piston seat and upper center tube remains static, it is logical above to mention active force
It crosses top connection and lock tube is transmitted to deblocking pin, cut deblocking pin, lock tube drive mentions extension pull ring, in upper center tube upper grooves
Interior movement, after lock tube inner cylinder uplink, closing piece loses outer support, when mention link mention hang upper center tube uplink when, move outside closing piece；On
When central tube uplink, lower center tube uplink is driven, pressure maintaining piston is detached from lower center tube sealing surface, packing element internal pressure relief is expanded,
Interior receipts under packing element contraction power complete deblocking movement.The packer sealing effect is good, unsealing operation is simple, still, the packing
Device solution be honored as a queen floating junction (be equivalent to and set piston) uplink squeeze expansion packing element, expand packing element on steel band in floating junction
Squeeze it is lower probably accumulates, the operation that generally requires to carry out large repairs when expanding packing element generation steel band and accumulating is repaired
It is multiple, cause heavy economic losses.
Utility model content
The purpose of this utility model is to provide a kind of water injection packers, it is intended to expand glue after solving existing removing seal for packer
Cylinder steel band accumulates problem.
To achieve the above object, the technical solution of the water injection packer of the utility model is:
Water injection packer includes central tube and the packing element that is set on central tube, and the lower end of packing element, which is fixed with, sets work
Plug, the outer peripheral surface of the central tube and set in the inner peripheral surface of piston one of them be equipped with retaining groove, set on another
Have and protrudes into retaining groove during central tube uplink and be used to set piston and central tube locking with retaining groove block
Elastic locking structure.
The utility model has the advantages that the water injection packer solution of the utility model is honored as a queen, during central tube uplink, elastic locking structure is stretched
Enter to making central tube in retaining groove and set piston locking, sets piston and the common uplink of central tube and opposite with packing element quiet
Only, the steel band set in piston stroking upward extruding packing element is avoided, to solve the problems, such as steel band accumulation, enhances packer use
Reliability.
Further, the retaining groove is located on the outer peripheral surface of central tube, and the elastic locking structure, which is located at, sets work
On the inner peripheral surface of plug.Convenient for setting on the outer peripheral surface of the centrally disposed pipe of retaining groove.
Further, the retaining groove is the annular retaining groove for being arranged circumferentially in central tube outer peripheral surface, the elasticity
Locking mechanism is to be arranged circumferentially in the elastic locking ring set on piston inner peripheral surface.Elastic locking ring and annular retaining groove cooperate
Use the locking intensity for facilitating enhancing central tube with setting piston.
Further, the elastic locking ring is C-shaped snap ring.Help to protrude into retaining ring inside locking slot.
Further, the upper end of the packing element is fixed with piston seat, the upper end seal of the annular space between piston seat and central tube
It is stifled, pressure maintaining piston and reset spring, one section of center of pressure maintaining piston on the side are equipped in the annular space between piston seat and central tube
Pipe is equipped with the pressure transmission hole of connection center tube cavity, and the piston seat includes dead ring, and the dead ring and pressure maintaining piston are mutual
Sealing ring is equipped at the sealing surface of cooperation, the piston seat further includes for sealing ring being pressed on dead ring to prevent from sealing
Enclose the clamping sleeve to fall off.Help to prevent sealing ring from falling off, enhances packer sealing performance.
Further, the clamping sleeve is threadedly coupled with dead ring.Threaded connection helps to enhance clamping sleeve compression sealing
The intensity of circle.
Further, the inner peripheral surface of the dead ring is equipped with sealing ring mounting groove.Have while being easily installed sealing ring
Help enhance fixing intensity of the sealing ring in dead ring.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the water injection packer of the utility model；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the partial enlarged view in Fig. 1 at B；
Fig. 4 is the structural schematic diagram of the packing element in Fig. 1；
Fig. 5 is the cross-sectional view in Fig. 4 at A-A；
In figure: 1- top connection, 2- propose extension inner tube, and 3- solves big envelope, and 4- divides valve link, and 5- unseals pin, 6- closing piece, and 7- is compressed
Set, 8- mention hanging sleeve, 9- dead ring, 10-L type sealing ring, 11- pressure maintaining piston, 12- reset spring, 13- packing element, 131- connector,
Packing element compression ring in 132-, 133- steel band weld, 134- steel band, packing element in 135-, the outer packing element of 136-, 14- central tube, 15-
Set piston, 16- retaining ring, 17- stop collar, 18- lower contact.
Specific embodiment
The embodiments of the present invention is described further with reference to the accompanying drawing.
The specific embodiment one of the water injection packer of the utility model, as shown in Figs. 1-5, water injection packer includes top connection
1, it mentions and hangs inner tube 2, solution big envelope 3, divide valve link 4, deblocking pin 5, closing piece 6, clamping sleeve 7, propose hanging sleeve 8, dead ring 9, L-type sealing
Circle 10, reset spring 12, expanding packing element 13, central tube 14, sets piston 15, retaining ring 16, stop collar at pressure maintaining piston 11
17, lower contact 18 forms.
Packing element 13 is set on central tube 14, and the upper end of packing element 13 is coaxially fixed with dead ring 9, dead ring 9 and central tube
The upper end of annular space between 14 blocks, and is equipped in the annular space between dead ring 9 and central tube 14 relative to dead ring 9 and central tube
14 seal the pressure maintaining piston 11 of slidable fits and for providing an active force towards 9 direction of dead ring for pressure maintaining piston 11
Reset spring 12, one section of central tube 14 of the upside of pressure maintaining piston 11 is equipped with the biography of connection central tube 14 inner cavity and the annular space
Hole is pressed, the lower end of packing element 13, which is fixed with, sets piston 15 relative to the sealing slidable fit of central tube 14, and water injection packer also wraps
Include the position limiting structure that limitation sets the up stroke of piston 15, position limiting structure include the stop part fixed relative to central tube 14 with
And relative to the locating part for setting the fixation of piston 15, stop part, which is located at, to be set at the setting limit position of 15 up stroke of piston, is limited
Position part and stop part axial direction block cooperate.Stop part and locating part realize that block cooperates by hook mode.In the present embodiment, sit
It seals 15 lower part of piston and connects restraining position ring block 17, the lower part of stop collar 17 has varus block machine, and 14 lower part of central tube, which is fixed with down, to be connect
Head, the top of lower contact are equipped with block machine of turning up, and stop collar 17 constitutes locating part, and lower contact constitutes stop part.
It mentions hanging outside inner tube 2 and there is an annular groove and dish-shaped groove, groove outer diameter is slightly less than a point valve link 4；It compresses
Set 7 is inserted in from extension 2 lower end of inner tube is mentioned, and uniformly distributed square hole is provided on clamping sleeve 7, closing piece 6 is packed into square hole, and be embedded in dish
Connected in star internal locking, clamping sleeve 7 and dead ring 9 constitute piston seat.
Solution big envelope 3 is inserted in from 7 upper end of clamping sleeve, and solution big envelope 3 has inner convex platform structure, and inner convex platform is adjacent to 7 upper end of clamping sleeve
Face；It mentions hanging sleeve 8 to be inserted in from 7 lower end of clamping sleeve, be connect by screw thread with solution big envelope 3；Being divided to valve link 4 is two semicircular rings, assembled
It is mentioning in the annular groove for hanging inner tube 2, and with steel wire banding；Top connection 1 from mention hang 2 upper end of inner tube be inserted in, while with solution big envelope 3
By screwed connection, top connection 1 and solution big envelope 3, mention hang inner tube 2 pass through rubber sealing；Reset spring 12 divides with pressure maintaining piston 11
It is not packed into from 14 upper end of central tube, on the boss sealing surface of 14 upper end of central tube, reset spring 12 is adjacent to pressure maintaining piston 11
11 lower end of pressure maintaining piston, central tube 14 pass through screwed connection with extension inner tube 2 is proposed, and the upper end of the boss of central tube 14 is provided with uniformly distributed
Pressure transmission hole, 14 lower end of central tube are provided with retaining groove in outside.
L-type sealing ring 10 is sleeved on 7 lower end of clamping sleeve, and dead ring 9 is connected by screw thread with clamping sleeve 7, and it is close to compress L-type
Seal 10；The horizontal component of L shape sealing ring 10 stretches in the sealing ring mounting groove of dead ring 9, the vertical portion of L shape sealing ring 10
Set 7 point is compacted to be pressed on dead ring 9.Expanding packing element 13 is connect by screw thread with dead ring 9, is equipped with outside dead ring 9
Cushion rubber and expanding packing element 13, which are formed, to be sealed；13 lower end of expanding packing element passes through screwed connection with piston 15 is set, and sets piston
15 outsides form equipped with cushion rubber and expanding packing element 13 and seal, and set piston 15 and are provided with retaining ring 16, retaining ring 16 is fluting
The preload annulus of shape；Lower contact 18 is provided with sealing ring, connect sealing with central tube 14 by screw thread；Stop collar 17 is from lower contact
18 lower ends are packed into, and pass through screwed connection with piston 15 is set.17 lower end of stop collar has inner convex platform structure, and boss outer diameter is slightly larger than
18 big end outer diameter of lower contact, 18 upper end of lower contact have outer lug boss structure, and boss outer diameter is slightly less than 17 internal diameter of stop collar.
Packing element 13 in the present embodiment includes the connector 131 that setting both ends are connect with central tube 14 respectively, and connector 131 connects
There is interior packing element compression ring 132, interior packing element 135 is connected in the interior packing element compression ring 132 at both ends, is set on interior 135 outer peripheral surface of packing element
It is equipped with steel band 134, steel band 134 and interior packing element compression ring 132 to weld in steel band weld 133, be set on the outer peripheral surface of steel band 134
There is outer packing element 136, outer packing element 136 is located at the center of steel band 134, and the axial length of outer packing element 136 is less than steel band 134
Axial length.
When setting, hydraulic medium is added from central passage, hydraulic medium enters from the pressure transmission hole of 14 upper end of central tube, pushes open
Pressure maintaining piston 11 expands expanding packing element 13 gradually, and drive sets 15 uplink of piston, sets piston 15 and drives on stop collar 17
Row, after expanding packing element 13 is set completely, the inner convex platform of stop collar 17 hangs in the outer lug boss of lower contact 18 and stops uplink,
Completion is set.
When deblocking, upper body top connection 1, top connection 1, which drives, solves 3 uplink of big envelope, cuts deblocking pin 5, and solution big envelope 3, which drives, to be divided
4 uplink of valve link divides the drive of valve link 4 to mention and hangs inner tube 2,14 uplink of central tube, the boss of 11 off center pipe 14 of pressure maintaining piston
Sealing surface makes packer pressure-keeping mechanism lose sealing, the gradually inwardly recycling of expanding packing element 13, while retaining ring 16 enters center
In the retaining groove of 14 lower end of pipe and lock.After solving big envelope 3 and above mentioning to certain altitude, closing piece 6 deviates from the dish for mentioning and hanging inner tube 2
Groove makes to mention and hangs inner tube 2 and clamping sleeve 7 loses locking, and solution big envelope 3 continues uplink, mentions hanging sleeve 8 and drives closing piece 6, clamping sleeve 7, tightly
Gu 9 uplink of ring pulls 13 uplink of expanding packing element, deblocking completely is realized.
It is in place of the specific embodiment two of the water injection packer of the utility model, with the difference of embodiment one, this implementation
Retaining ring in example on dead ring can also be locked block replacement, and the locking slot on certain central tube periphery may be and lock
The locking slot of block block cooperation, latch segment are multiple and are arranged circumferentially in dead ring inner peripheral surface that locking slot is multiple and all
To on the outer peripheral surface for being evenly arranged in central tube.Other are the same as example 1, and repeat no more.
Claims (7)
1. water injection packer, including central tube and the packing element being set on central tube, the lower end of packing element, which is fixed with, sets piston,
It is characterized by: the outer peripheral surface of the central tube is equipped with retaining groove with one of them set in the inner peripheral surface of piston, separately
One is equipped with and protrudes into retaining groove during central tube uplink and with retaining groove block for will set piston and center
The elastic locking structure of pipe locking.
2. water injection packer according to claim 1, it is characterised in that: the retaining groove is located at the outer peripheral surface of central tube
On, the elastic locking structure, which is located at, to be set on the inner peripheral surface of piston.
3. water injection packer according to claim 2, it is characterised in that: the retaining groove is to be arranged circumferentially in central tube
The annular retaining groove of outer peripheral surface, the elastic locking structure are to be arranged circumferentially in the elastic locking set on piston inner peripheral surface
Ring.
4. water injection packer according to claim 3, it is characterised in that: the elastic locking ring is C-shaped snap ring.
5. described in any item water injection packers according to claim 1 ~ 4, it is characterised in that: the upper end of the packing element is fixed with work
The upper end of obturating plug, the annular space between piston seat and central tube blocks, and it is living that pressure maintaining is equipped in the annular space between piston seat and central tube
Plug and reset spring, one section of central tube of pressure maintaining piston on the side are equipped with the pressure transmission hole of connection center tube cavity, the piston
Seat includes dead ring, is equipped with sealing ring at the dead ring and the mutually matched sealing surface of pressure maintaining piston, the piston seat also wraps
Include the clamping sleeve for being pressed on sealing ring on dead ring to prevent sealing ring from falling off.
6. water injection packer according to claim 5, it is characterised in that: the clamping sleeve is threadedly coupled with dead ring.
7. water injection packer according to claim 6, it is characterised in that: the inner peripheral surface of the dead ring is equipped with sealing ring
Mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820924144.XU CN208310736U (en) | 2018-06-14 | 2018-06-14 | Water injection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820924144.XU CN208310736U (en) | 2018-06-14 | 2018-06-14 | Water injection packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208310736U true CN208310736U (en) | 2019-01-01 |
Family
ID=64707436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820924144.XU Active CN208310736U (en) | 2018-06-14 | 2018-06-14 | Water injection packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208310736U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627763A (en) * | 2020-12-11 | 2021-04-09 | 中国石油集团渤海钻探工程有限公司 | Floating expansion type packer |
-
2018
- 2018-06-14 CN CN201820924144.XU patent/CN208310736U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627763A (en) * | 2020-12-11 | 2021-04-09 | 中国石油集团渤海钻探工程有限公司 | Floating expansion type packer |
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| GR01 | Patent grant |