CN206707659U - A kind of negative pressure unfreezing antiscale hydraulic anchor - Google Patents
A kind of negative pressure unfreezing antiscale hydraulic anchor Download PDFInfo
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- CN206707659U CN206707659U CN201720542784.XU CN201720542784U CN206707659U CN 206707659 U CN206707659 U CN 206707659U CN 201720542784 U CN201720542784 U CN 201720542784U CN 206707659 U CN206707659 U CN 206707659U
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- anchor
- central tube
- negative pressure
- unfreezing
- antiscale
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Abstract
Oil-gas mining technical field is the utility model is related to, more particularly to a kind of negative pressure unfreezing antiscale hydraulic anchor.Negative pressure unfreezing antiscale hydraulic anchor disclosed in the utility model, including central tube, it is connected to the top connection of the central tube upper end, is fitted around anchor mechanism in the central tube bottom, self-locking mechanism is also surrounded with outside central tube, self-locking mechanism includes seal nipple, the adapter sleeve being fixedly connected with the seal nipple, Air-tight piston and elastomeric element.The utility model, which not only effectively prevent, to be occurred midway and sits the situation of anchor during hydraulic anchor is gone into the well, improved hydraulic anchor and gone into the well security reliability；And it is upper propose unfreezing, disanchor operation while, anchor fluke inner chamber produce negative pressure, anchor fluke by radial direction reclaim power, anchor fluke force withdraw.So as to further lift hydraulic anchor service behaviour, hydraulic anchor security reliability and unfreezing, reliability of disanchoring are improved.
Description
Technical field
Oil-gas mining technical field is the utility model is related to, more particularly to a kind of negative pressure unfreezing antiscale hydraulic anchor.
Background technology
More careful to the understanding of oil reservoir with deepening continuously for the work such as Reservoir Description, interlayer difference is big in addition, right
The demand of seperated layer water injection is stronger, requires tightened up.In addition, with high pressure low permeability block waterflooding extraction, also proposed to seperated layer water injection
Higher requirement.Water filling layer starts pressure height, and string creep is serious, turns into the major issue for restricting high-voltage layering injection.
At present in water injection well layering construction, to prevent string creep, pushing up on packer, mainly using hydraulic anchor as anti-
String creep instrument uses.Usually used hydraulic anchor mainly has anchor body or anchor fluke to form, mainly by being built the pressure in oil pipe, waterpower
Anchor anchor fluke is protruding in the presence of fluid pressure, clamping internal surface of sleeve pipe, realizes that grappling acts.After oil jacket pressure balance,
Anchor fluke is withdrawn under the elastic force effect of baffle plate inner spring, releases grappling effect.Oil well work oil pumping when, fluid column be supported on oil pipe with
Change on sucker rod with oil pumper up-down stroke and alternately shift, oil pipe is wriggled, it is low, oily oil well pump operating efficiency easily occur
The problems such as pipe is threaded off.Oil pipe is fixed using hydraulic anchor, oil pipe extension can be prevented, and then improves the operating efficiency of oil well pump, is kept away
Exempt from oil pipe dropout.
Chinese patent literature CN2177801Y discloses a kind of hydraulic anchor, it is characterized in that 15 anchor fluke holes of cloth in main body,
Walk 3 holes in vertical body axial plane, hole is in longitudinal uniform 6 row of main body, and long row, each 3 of short row are spaced, long row
3 holes are often arranged, short row often arranges 2 holes, and hole is in staggered distribution.
Chinese patent literature CN201865633U discloses a kind of hydraulic anchor, including anchor body and anchor fluke, is set on the anchor body
Be equipped with nine anchor fluke drilled through holes, the circumference on the anchor body is evenly distributed with three groups of anchor fluke hole groups, anchor fluke hole described in every group by
Three equally distributed anchor fluke hole compositions in the axial direction of the anchor body.
The pattern of hydraulic anchor, anchor fluke hole are described above-mentioned document in the even distribution of anchor body, but in practical application
In, following deficiency be present：1) anchorage force is frictional force of the hydraulic anchor anchor fluke with internal surface of sleeve pipe under inside and outside differential pressure effect.And waterpower
The inside and outside differential pressure of anchor fluke is the anchorage force deficiency that the chock pressure difference of underground water distribution instrument, only 1~2MPa, therefore hydraulic anchor provide
To resist the peristaltic forces of tubing string；2) when stopping note, anchor fluke recovery, anchoring states release, and water injection string is compacted caused by temperature effect
Dynamic to solve, packer significantly impacts water injection string useful working life because of the easy seal failure of string creep；3) grappling
During tubing string, the easy fouling of cavity between anchor fluke and anchor body, anchor fluke is caused to be difficult to reclaim；4) during going into the well, by hydraulic blow
Influence, anchor fluke struts, and is easily caused tubing string during midway is sat anchor, anchor fluke abrasion or gone into the well and meets card.
Chinese patent literature CN204716166 U disclose a kind of enclosed self-locking hydraulic anchor, including anchor mechanism, closed machine
Structure, the mechanism that disanchors, self-locking mechanism, central tube, anchor mechanism, closure mechanism, self-locking mechanism, the mechanism that disanchors are set successively from bottom to top
Put on the outside of central tube, closure mechanism is connected to the upper end of anchor mechanism, self-locking mechanism lower end connection closure mechanism, self-locking mechanism
Upper end connects the mechanism that disanchors, and the upper inlet opening towards the mechanism that disanchors is opened up on central tube, is further opened with leading on the central tube
The lower inlet opening of self-locking mechanism.But the instrument is in use, following technical problem be present：1) during going into the well, by
Hydraulic blow influences, and anchor fluke struts, and is easily caused tubing string during midway is sat anchor, anchor fluke abrasion or gone into the well and meets card；2) anchor process is sat
In closing piece release to be also present difficult, be easily caused and sit anchor failure；3) disanchor, unfreezing mode it is single, poor reliability.
Therefore, hydraulic anchor of the prior art can not effectively carry out grappling, release grappling operation, its stability, can
It is unsatisfactory by property.
Utility model content
For the above-mentioned technical problem in the presence of prior art, the utility model proposes a kind of negative pressure unfreezing antiscale water
Power anchor, its effectively prevent midway sit anchor, sit anchor failure and disanchor difficulty situations such as generation, in grappling, release grappling and solution
Performance is more stable, more reliable in terms of card.
A kind of negative pressure unfreezing antiscale hydraulic anchor is provided according to the utility model, including central tube, is connected to the center
The top connection of pipe upper end, anchor mechanism in the central tube bottom is fitted around, is also surrounded with outside the central tube
Self-locking mechanism, the self-locking mechanism include seal nipple, the adapter sleeve being fixedly connected with the seal nipple, Air-tight piston and bullet
Property part, the Air-tight piston is set in the annular space that the adapter sleeve, seal nipple and central tube are formed, described close
Close piston upper end to be in contact with seal nipple lower end, lower end is connected with the elastomeric element, and the elastomeric element is seated adapter sleeve
In the end stand at middle part, the seal nipple is fixed together by shear pin of disanchoring with the top connection, and the central tube top is also
It is provided with the feed pathway of radial direction.
Cylinder sleeve is surrounded with outside the central tube, the cylinder sleeve both ends are connected with the adapter sleeve, anchor mechanism respectively,
Liquid cylinder piston is additionally provided between the cylinder sleeve and central tube.
As a kind of improvement of the present utility model, the hydraulic anchor is additionally provided with security control mechanism, the security control mechanism
In the annular space formed positioned at the cylinder sleeve and central tube, the security control includes closing piece, release ring and control shear pin, institute
Closing piece is stated between the adapter sleeve and central tube, to limit the relative movement of the adapter sleeve and central tube, the connection
By controlling shear pin to connect between set and liquid cylinder piston, the release ring is located on the outside of closing piece, the release ring and liquid cylinder piston
Between to be flexibly connected, and can relatively move.
Gear cap is additionally provided between the top connection and seal nipple, the gear cap is looped around in top connection, and with institute
State seal nipple and be connected through a screw thread sealing.
As another improvement of the present utility model, negative pressure unfreezing mechanism is also surrounded with outside the central tube, this is negative
Pressure unfreezing mechanism includes negative-pressure dense seal ring, and the negative-pressure dense seal ring is connected through a screw thread with the central tube.
The negative pressure unfreezing mechanism also includes being arranged on the annular being engaged with the negative-pressure dense seal ring on the inside of the cylinder sleeve
Projection, when the negative-pressure dense seal ring moves up, it can be bonded with the raised seals.
Described elastomeric element is spring or leaf spring.
As another improvement of the present utility model, described anchor mechanism includes anchor body, anchor fluke, pressing plate, back-moving spring
And screw, anchor hole is provided with the anchor body, the anchor fluke installation is described with anchor hole, pressing plate is provided with the outside of the anchor fluke
Pressing plate is fixed by screws on anchor body, and the hole for being available for anchor fluke to stretch out is additionally provided with the pressing plate.
O-ring seal is additionally provided between the central tube and anchor body.
Compared with prior art, the utility model has the advantage of by setting security control mechanism, effectively prevent water
Power anchor occurs midway during going into the well and sits anchor situation, improves hydraulic anchor and goes into the well security reliability；Meanwhile security control mechanism is adopted
With substep delivery mode, realize and discharge closing piece after first cutting shear pin, avoid the occurrence of shear pin shearing and release closing piece is synchronously deposited
Closing piece release it is difficult the problem of, improve closing piece release success rate, improve hydraulic anchor functional reliability；In addition, also set
Be equipped with negative pressure unfreezing mechanism, it is upper propose unfreezing, disanchor operation while, anchor fluke inner chamber produces negative pressure, and anchor fluke radially reclaimed
Power, anchor fluke are forced to withdraw.So as to further lift hydraulic anchor service behaviour, improve hydraulic anchor security reliability and unfreezing, disanchor
Reliability.
Brief description of the drawings
Fig. 1 is the structural representation of negative pressure unfreezing antiscale hydraulic anchor of the present utility model.
In figure：1- top connections；2- gear caps；3- seal nipples；4- disanchors shear pin；5- adapter sleeves；6- Air-tight pistons；7- elasticity
Part；8- central tubes；9- closing pieces；10- discharges ring；11- controls shear pin；12- liquid cylinder pistons；13- cylinder sleeves；14- negative-pressure dense seal rings；
15- anchor bodies；16- screws；17- anchor flukes；18- back-moving springs；19- pressing plates.
Embodiment
Relevant detailed description of the present utility model and technology contents, coordinate brief description of the drawings as follows, but accompanying drawing only provides ginseng
Examine and purposes of discussion, be not used for being any limitation as the utility model.
Fig. 1 is the structural representation of negative pressure unfreezing antiscale hydraulic anchor of the present utility model.A kind of negative pressure unfreezing antiscale waterpower
Anchor, including central tube 8, be connected to the top connection 1 of the upper end of central tube 8, be fitted around grappling machine in the bottom of central tube 8
Structure, is also surrounded with self-locking mechanism outside central tube 8, and self-locking mechanism includes seal nipple 3, is fixedly connected with seal nipple 3
Adapter sleeve 5, Air-tight piston 6 and elastomeric element 7, Air-tight piston 6 is set in 8 adapter sleeve 5, seal nipple 3 and central tube shapes
Into annular space in, the upper end of Air-tight piston 6 is in contact with the lower end of seal nipple 3, and lower end is connected with elastomeric element 7, the elasticity
Part 7 is seated in the end stand at the middle part of adapter sleeve 5, and seal nipple 3 is fixed together by shear pin 4 of disanchoring with top connection 1, center
The top of pipe 8 is additionally provided with the feed pathway of radial direction.In one embodiment, elastomeric element 7 can be spring or leaf spring.
Cylinder sleeve 13 is surrounded with outside central tube 8, the both ends of cylinder sleeve 13 respectively with the adapter sleeve 5, anchor mechanism phase
Even, it is additionally provided with liquid cylinder piston 12 between the cylinder sleeve 13 and central tube 8.
Anchor mechanism includes anchor body 15, anchor fluke 17, pressing plate 19, back-moving spring 18 and screw 16, and anchor is provided with anchor body 15
Hole, the installation of anchor fluke 17 on the outside of anchor fluke 17 with anchor hole, being provided with pressing plate 19, pressing plate 19 is fixed by screws on anchor body, pressing plate
The hole for being available for anchor fluke 17 to stretch out is additionally provided with 19.
According to the utility model, the hydraulic anchor is additionally provided with security control mechanism, and the security control mechanism is located at the cylinder
In the annular space that set 13 is formed with central tube 8, the security control includes closing piece 9, release ring 10 and control shear pin 11, closing piece
9 between adapter sleeve 5 and central tube 8, to limit the relative movement of the adapter sleeve 5 and central tube 8, adapter sleeve 5 and fluid cylinder
By controlling shear pin 11 to connect between piston 12, release ring 10 is located at the outside of closing piece 9, is between release ring 10 and liquid cylinder piston 12
It is flexibly connected, and can relatively moves.
In another embodiment, gear cap 2 is additionally provided between top connection 1 and seal nipple 3, gear cap 2, which is looped around, to be connect
On first 1, and sealing is connected through a screw thread with seal nipple 3.
According to the utility model, negative pressure unfreezing mechanism is also surrounded with outside the central tube 8, the negative pressure unfreezing mechanism
Including negative-pressure dense seal ring 14, negative-pressure dense seal ring 14 can be connected through a screw thread with central tube 8.Negative pressure unfreezing mechanism also includes setting
, can be convex with this when the negative-pressure dense seal ring 14 moves up in the annular protrusion that the inner side of cylinder sleeve 13 is engaged with negative-pressure dense seal ring 14
Play palette.
In yet another embodiment, the internal diameter of annular protrusion should be equal to or slightly less than the external diameter of negative-pressure dense seal ring, at center
O-ring seal is additionally provided between pipe 8 and anchor body 15.
When carrying out grappling operation at the scene：Pumping liquid increases hydraulic pressure first into oil pipe, and hydraulic pressure passes through the top of central tube 8
Inlet opening promote Air-tight piston 6 to overcome the elastic force of elastomeric element 7 to move down further elasticity of compression part 7, until feed liquor leads to
Road is opened, and lasting supercharging is up to cutting control shear pin 11 and moving down in the presence of hydraulic pressure for liquid cylinder piston 12, in liquid cylinder piston 12
Mobile a small distance so that when liquid cylinder piston 12 reaches maximum spacing with release ring 10, the dragging release ring 10 of liquid cylinder piston 12
Move down, then closing piece 9 is released, and central tube 8 is no longer connected with adapter sleeve 5 and can relatively moved, while liquid cylinder piston 12
The hydraulic oil in cylinder sleeve 13 can be extruded when moving down, space of the hydraulic oil between central tube 8 and anchor body 15 enters the institute of anchor fluke 17
In cavity, anchor fluke 17 overcomes the elastic force of back-moving spring 18 in the case where the pressure of hydraulic oil promotes, anchor hole is stretched out, so as to grappling pipe
Post.After oil pipe pressure release, Air-tight piston 6 moves up under the resilient force of elastomeric element 7, contacts and seals with seal nipple 3, enters
Liquid passage is closed, and now, hydraulic fluid pressure remains in that higher than the pressure in sleeve pipe, anchor fluke 17 in the case where the pressure of hydraulic oil promotes
Anchoring states.
When disanchoring operation：Upper lifting pipe post, the shear pin 4 of disanchoring between top connection 1 and seal nipple 3 are cut；The band of top connection 1
Dynamic central tube 8, negative-pressure dense seal ring 14 move up, until negative-pressure dense seal ring 14 is in contact with being arranged on the annular protrusion of the inner side of cylinder sleeve 13
During sealing, continue upper lifting pipe post, negative pressure is produced in anchor body 15, casing pressure is higher than the pressure of hydraulic oil in anchor body 15, anchor fluke 18
Reclaimed under pressure and the synergy of back-moving spring 18, after the cushion rubber on the lower end of central tube 8 and anchor body 15 departs from, release, anchor
Pawl is withdrawn completely, so as to release anchoring states.
Although the utility model is described by reference to preferred embodiment, model of the present utility model is not being departed from
In the case of enclosing, various improvement can be carried out to it and part therein can be replaced with equivalent.The utility model is not
It is confined to specific embodiment disclosed herein, but all technical schemes including falling within the scope of the appended claims.
Claims (9)
1. a kind of negative pressure unfreezing antiscale hydraulic anchor, including central tube, it is connected to the top connection of the central tube upper end, is fitted around
Anchor mechanism in the central tube bottom, it is characterised in that：Self-locking mechanism is also surrounded with outside the central tube, it is described
Self-locking mechanism includes seal nipple, the adapter sleeve being fixedly connected with the seal nipple, Air-tight piston and elastomeric element, described close
Piston is closed to be set in the annular space that the adapter sleeve, seal nipple and central tube are formed, the Air-tight piston upper end with
Seal nipple lower end is in contact, and lower end is connected with the elastomeric element, and the elastomeric element is seated in the end stand in the middle part of adapter sleeve,
The seal nipple is fixed together by shear pin of disanchoring with the top connection, and the central tube top is additionally provided with entering for radial direction
Liquid passage.
2. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 1, it is characterised in that：It is surrounded with outside the central tube
Cylinder sleeve, the cylinder sleeve both ends are connected with the adapter sleeve, anchor mechanism respectively, and liquid is additionally provided between the cylinder sleeve and central tube
Cylinder piston.
3. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 2, it is characterised in that：The hydraulic anchor is additionally provided with security control
Mechanism, the security control mechanism are located in the annular space that the cylinder sleeve and central tube are formed, the security control include closing piece,
Ring and control shear pin are discharged, the closing piece is between the adapter sleeve and central tube, to limit the adapter sleeve and central tube
Relative movement, by controlling shear pin to connect between the adapter sleeve and liquid cylinder piston, it is described release ring be located at closing piece outside, institute
State to be flexibly connected between release ring and liquid cylinder piston, and can relatively move.
4. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 3, it is characterised in that：The top connection and seal nipple it
Between be additionally provided with gear cap, the gear cap is looped around in top connection, and is connected through a screw thread sealing with the seal nipple.
5. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 3, it is characterised in that：Also around setting outside the central tube
There is negative pressure unfreezing mechanism, the negative pressure unfreezing mechanism includes negative-pressure dense seal ring, and the negative-pressure dense seal ring passes through spiral shell with the central tube
Line connects.
6. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 5, it is characterised in that：The negative pressure unfreezing mechanism also includes setting
The annular protrusion being engaged on the inside of the cylinder sleeve with the negative-pressure dense seal ring is put, can be with when the negative-pressure dense seal ring moves up
The raised seals are bonded.
7. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 1, it is characterised in that：Described elastomeric element is spring or plate
Spring.
8. the negative pressure unfreezing antiscale hydraulic anchor as described in claim any one of 1-7, it is characterised in that：Described anchor mechanism bag
Include anchor body, anchor fluke, pressing plate, back-moving spring and screw, be provided with anchor hole on the anchor body, the anchor fluke installation with anchor hole, institute
State and be provided with pressing plate on the outside of anchor fluke, the pressing plate is fixed by screws on anchor body, is additionally provided with the pressing plate and is available for anchor fluke
The hole of stretching.
9. negative pressure unfreezing antiscale hydraulic anchor as claimed in claim 8, it is characterised in that：Between the central tube and anchor body also
It is provided with O-ring seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720542784.XU CN206707659U (en) | 2017-05-16 | 2017-05-16 | A kind of negative pressure unfreezing antiscale hydraulic anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720542784.XU CN206707659U (en) | 2017-05-16 | 2017-05-16 | A kind of negative pressure unfreezing antiscale hydraulic anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206707659U true CN206707659U (en) | 2017-12-05 |
Family
ID=60464337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720542784.XU Expired - Fee Related CN206707659U (en) | 2017-05-16 | 2017-05-16 | A kind of negative pressure unfreezing antiscale hydraulic anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206707659U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868674A (en) * | 2017-05-16 | 2018-11-23 | 中国石油化工股份有限公司 | Negative pressure unfreezing antiscale hydraulic anchor |
| CN112483032A (en) * | 2019-09-11 | 2021-03-12 | 中国石油天然气股份有限公司 | Cutting device |
| CN113389510A (en) * | 2021-06-29 | 2021-09-14 | 高洁琳 | Hydraulic anchor convenient for stable anchor withdrawal for oil well |
-
2017
- 2017-05-16 CN CN201720542784.XU patent/CN206707659U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868674A (en) * | 2017-05-16 | 2018-11-23 | 中国石油化工股份有限公司 | Negative pressure unfreezing antiscale hydraulic anchor |
| CN108868674B (en) * | 2017-05-16 | 2024-06-18 | 中国石油化工股份有限公司 | Negative pressure unclamping antiscaling hydraulic anchor |
| CN112483032A (en) * | 2019-09-11 | 2021-03-12 | 中国石油天然气股份有限公司 | Cutting device |
| CN113389510A (en) * | 2021-06-29 | 2021-09-14 | 高洁琳 | Hydraulic anchor convenient for stable anchor withdrawal for oil well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171205 Termination date: 20190516 |
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| CF01 | Termination of patent right due to non-payment of annual fee |