CN205858230U - Hydraulic anchor - Google Patents
Hydraulic anchor Download PDFInfo
- Publication number
- CN205858230U CN205858230U CN201620799148.0U CN201620799148U CN205858230U CN 205858230 U CN205858230 U CN 205858230U CN 201620799148 U CN201620799148 U CN 201620799148U CN 205858230 U CN205858230 U CN 205858230U
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- Prior art keywords
- anchor
- anchor tooth
- tooth
- inner sleeve
- hydraulic
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- 238000007789 sealing Methods 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 9
- 210000000664 rectum Anatomy 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000012530 fluid Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 241000935974 Paralichthys dentatus Species 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model provides a hydraulic anchor. The utility model discloses a hydraulic anchor, including cavity tube-shape body, bush, endotheca, anchor tooth and elastic component, the bush sets up in the cavity intracavity of body, and the body sets up a plurality of anchor tooth holes perpendicular to body axial direction, and the endotheca sets up in anchor tooth hole slidable, and the endotheca is located the bush outside, and anchor tooth slidable sets up in the endotheca, and the endotheca is used for when the cavity intracavity pressure of body increases, drives anchor tooth and stretches out from anchor tooth hole to make anchor tooth anchor at the pipe shaft inner wall; the elastic part is arranged on the outer side of the body and pressed at one end of the anchor tooth facing the outer side of the body, and the elastic part is used for pressing the anchor tooth back into the anchor tooth hole when the pressure in the cavity in the body is reduced. The utility model discloses the anchor tooth that can utilize the two-stage to stretch out reduces anchor tooth occupation space, increases hydraulic anchor latus rectum to adapt to great throttle pressure, be difficult for blockking up fracturing sand simultaneously.
Description
Technical field
This utility model relates to oil mining field, particularly relates to a kind of hydraulic anchor.
Background technology
For improving Oil/gas Well yield, it usually needs stratum is carried out fracturing reform.Recently as huge discharge volume fracturing
The introduction of thinking, oil field achieves preferable effect of increasing production.But owing to speed bores the limitation of bridge plug technology itself, need research and development one
Huge discharge volume fracturing string technology.
At present, when carrying out formation breakdown, hydraulic anchor generally can be used to carry out grappling operation, prevent downhole tool from producing position
Move.Concrete, when operation, by building the pressure in oil pipe, hydraulic anchor anchor fluke is protruding under the effect of fluid pressure, clamping set
Inside pipe wall, it is achieved grappling action.When, after oil jacket pressure balance, anchor fluke is regained under the elastic force effect of baffle plate inner spring, release anchor
It is set for using.
But, owing to the undergauge throttling in the lifting of " volume fracturing " operational discharge capacity, tubing string and instrument can produce high
Infusion pressure.Existing hydraulic anchor, its internal latus rectum is less, it is difficult to adapt to bigger choke pressure, and in-house tool and sleeve pipe
Gap too small, easily cause the blocking of fracturing sand.
Utility model content
This utility model provides a kind of hydraulic anchor, adapts to bigger choke pressure, is not easily blocked fracturing sand simultaneously.
This utility model provides a kind of hydraulic anchor, including hollow tube-shape body, lining, inner sleeve, anchor tooth and elastic component, body
Be hollow tube-shape with lining, and lining be arranged in the cavity of body, body offer multiple be perpendicular to body axially side
To anchor tooth hole, the quantity of inner sleeve and anchor tooth is all equal with anchor tooth hole number, and inner sleeve is slidably disposed in anchor tooth hole, and interior
Set is positioned at outside lining, and anchor tooth is slidably disposed in inner sleeve, and inner sleeve, anchor tooth hole and the equal one_to_one corresponding of anchor tooth, inner sleeve is used for
When pressure increases in the cavity of body, anchor tooth is driven to stretch out from anchor tooth hole, so that anchor tooth is anchored on pipe well inwall；Elastic
Part is arranged on outer body, and is pressed on anchor tooth one end towards outer body, and elastic component is for empty cavity pressure in the body
During reduction, anchor tooth is pushed back in anchor tooth hole.So because inner sleeve and anchor tooth stretch for two-stage type in the anchor tooth hole of body, institute
With inner sleeve and anchor tooth, the length in telescopic direction can be less, thus body for accommodating the space of anchor tooth and inner sleeve at this
Size on direction is the least, thus can be under identical this body diameter of hydraulic anchor, it is achieved bigger centre bore aperture.So
On the one hand because the latus rectum of hydraulic anchor can be relatively big, so making choke pressure less, on the other hand, it is possible to make the work of inside pipe casing
Gap between tool and sleeve pipe is relatively big, thus the fracturing sand avoiding inside pipe casing deposited is blocked.
Optionally, being provided with limited step in each anchor tooth hole, limited step is enclosed within being used for limiting and stretches out anchor tooth hole
The displacement in direction.
Optionally, inner sleeve is hollow cylindrical configuration, and anchor facing is located in the hollow cavity of inner sleeve, inner sleeve towards lining
One end be provided with step, deviate from from this end limiting anchor tooth.
Optionally, one end towards outer body of anchor tooth is provided with anchor tooth stopper slot, and elastic component is leaf spring, leaf spring one end
Being fixed on outer body, the leaf spring other end is arranged in anchor tooth stopper slot.So when anchor tooth stretches out from anchor tooth hole, outside anchor tooth
Side end can be limited by leaf spring, thus avoids continuing to slide laterally, and meanwhile, leaf spring produces certain elastic deformation；And
When anchor tooth loses the support of fluid pressure differential, anchor tooth is pressed back in anchor tooth hole by leaf spring by its own resilient, to avoid outside anchor tooth
It is exposed at outside anchor tooth hole, and the situation causing hydraulic anchor to take out occurs.
Optionally, between inner sleeve and anchor tooth, and it is provided with sealing ring between anchor tooth hole and inner sleeve.Sealing ring can be
When anchor tooth and inner sleeve are stretched, all make anchor tooth hole keep sealing state, it is to avoid the liquid such as this internal fracturing fluid being passed through of hydraulic anchor from
Anchor tooth hole is flowed out, or the impurity outside hydraulic anchor enters hydraulic anchor, and this is internal.
Optionally, one end towards outer body of anchor tooth is provided with anchor palm.
Optionally, lining and body pass through screwed connection.
Optionally, multiple anchor tooth holes are divided into multiple anchor tooth holes group, and the interior anchor tooth hole number of each anchor tooth hole group is identical, and
Arrange at equal intervals along body axis direction.So power between hydraulic anchor and the borehole wall can uniformly be shared to multiple anchor teeth, thus
Hydraulic anchor is effectively ensured the anchor of the pipe well borehole wall is hung effect.
Optionally, group circumferentially direction, multiple anchor tooth hole is arranged on body.So anchor tooth hole group of different directions is permissible
Power hung by the anchor undertaking tubing string different directions, it is ensured that the anchor of tubing string is hung effect by hydraulic anchor.
Hydraulic anchor of the present utility model includes hollow tube-shape body, lining, inner sleeve, anchor tooth and elastic component, body and lining
Being hollow tube-shape, and lining is set in the cavity of body, body offers multiple anchor tooth hole being perpendicular to axial direction,
The quantity of inner sleeve and anchor tooth is all equal with anchor tooth hole number, and inner sleeve is slidably disposed in anchor tooth hole, and inner sleeve is positioned at lining
Outside, anchor tooth is slidably disposed in inner sleeve, and inner sleeve, anchor tooth hole and the equal one_to_one corresponding of anchor tooth, and inner sleeve is for by body
When pressure increases in cavity, anchor tooth is driven to stretch out from anchor tooth hole, so that anchor tooth is anchored on pipe well inwall；Elastic component is arranged on
Outer body, and it is pressed on anchor tooth one end towards outer body, elastic component, will when empty cavity pressure reduces in the body
Anchor tooth pushes back in anchor tooth hole.So because inner sleeve and anchor tooth stretch for two-stage type in the anchor tooth hole of body, so inner sleeve and anchor
Tooth length in telescopic direction can be less, so the chi that the space for accommodating anchor tooth and inner sleeve of body is in the direction
Very little the least, thus can be under identical this body diameter of hydraulic anchor, it is achieved bigger centre bore aperture.So on the one hand because
The latus rectum of hydraulic anchor can be relatively big, so making choke pressure less, on the other hand, it is possible to make inside pipe casing instrument and sleeve pipe it
Between gap relatively big, thus the fracturing sand avoiding inside pipe casing deposited is blocked.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is
Embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the hydraulic anchor that this utility model embodiment one provides；
Fig. 2 is the schematic cross-section of A-A section in Fig. 1；
Fig. 3 is the anchor tooth enlarged diagram in the hydraulic anchor that this utility model embodiment one provides.
Description of reference numerals:
1 body；
2 elastic components；
3 inner sleeves；
4 anchor teeth；
5 linings；
6,7 sealing ring；
11 anchor teeth.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that retouched
The embodiment stated is a part of embodiment of this utility model rather than whole embodiments.Based on the enforcement in this utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into
The scope of this utility model protection.
Fig. 1 is the structural representation of the hydraulic anchor that this utility model embodiment one provides.Fig. 2 be in Fig. 1 A-A section cut
Face schematic diagram.Fig. 3 is the anchor tooth enlarged diagram in the hydraulic anchor that this utility model embodiment one provides.As Fig. 1 to Fig. 3 institute
Showing, the hydraulic anchor that the present embodiment provides includes hollow tube-shape body 1, lining 5, inner sleeve 3, anchor tooth 4 and elastic component 2, body 1 and lining
Set 5 is hollow tube-shape, and lining 5 is set in the cavity of body 1, and body 1 offers multiple axial direction that is perpendicular to
Anchor tooth hole 11, the quantity of inner sleeve 3 and anchor tooth 4 is all equal with anchor tooth hole 11 quantity, and inner sleeve 3 is slidably disposed on anchor tooth hole 11
In, and inner sleeve 3 is positioned at outside lining 5, anchor tooth 4 is slidably disposed in inner sleeve 3, and inner sleeve 3, anchor tooth hole 11 and anchor tooth 4 are equal
One_to_one corresponding, when inner sleeve 3 is for increasing pressure in the cavity of body 1, drives anchor tooth 4 to stretch out from anchor tooth hole 11, so that
Anchor tooth 4 is anchored on pipe well inwall；Elastic component 2 is arranged on outside body 1, and is pressed on anchor tooth 4 towards the one end outside body 1,
Anchor tooth 4, for when body 1 hollow cavity pressure reduces, is pushed back in anchor tooth hole 11 by elastic component.
Concrete, the body 1 of hydraulic anchor docks with the fracturing string of huge discharge, and enters well with tubing string.Body 1 in
Empty tube shape, thus the centre bore of body 1 defines the hollow cavity of two ends perforate, can be passed through in hollow cavity fracturing fluid or
Other high-velocity fluid.Lining 5 is similarly hollow tube-shape, and lining 5 is set in the cylindrical hollow chamber of body 1, with to anchor tooth 4 He
Inner sleeve 3 is supported, it is to avoid anchor tooth 4 or inner sleeve 3 fall in the cavity at body 1 center.
Offering multiple anchor tooth hole 11 being perpendicular to body 1 axial direction on the sidewall of body 1, anchor tooth 4 can be arranged on
In anchor tooth hole 11, and when the internal pressure of hydraulic anchor changes, anchor tooth 4 can stretch out in anchor tooth hole 11, hang in pit shaft with anchor
On wall.
Wherein, inner sleeve 3 is slidably disposed in anchor tooth hole 11, and inner sleeve 3 is positioned at outside lining 5, and anchor tooth 4 is slidably
It is arranged in inner sleeve 3, inner sleeve 3, anchor tooth hole 11 and the equal one_to_one corresponding of anchor tooth 4.So in each anchor tooth hole 11, it is provided with one
Individual inner sleeve 3, and each inner sleeve 3 is equipped with an anchor tooth 4.Because anchor tooth 4 is arranged in inner sleeve 3, and inner sleeve 3 can be relative to anchor
Sliding in tooth hole 11, anchor tooth 4 also can slide relative to inner sleeve 3, so inner sleeve 3 and anchor tooth 4 together constitute telescopic two grades of knots
Structure, inner sleeve 3 can first drive anchor tooth 4 to stretch out from anchor tooth hole 11 together, and inner sleeve 3 extends to the end, and anchor tooth 4 is again from inner sleeve 3
Stretch out.So because inner sleeve 3 and anchor tooth 4 are flexible for two-stage type in the anchor tooth hole 11 of body 1, thus with existing hydraulic anchor phase
Ratio, inner sleeve 3 and the anchor tooth 4 length in telescopic direction can be less, thus body 1 for accommodating anchor tooth 4 and inner sleeve 3
Space size in the direction is the least, thus can be under identical hydraulic anchor body 1 external diameter, it is achieved bigger centre bore
Aperture.So on the one hand, because the latus rectum of hydraulic anchor can be relatively big, so making choke pressure less, on the other hand, it is possible to make set
The gap between instrument and sleeve pipe within pipe is relatively big, thus the fracturing sand avoiding inside pipe casing deposited is blocked.
Concrete, when adding the liquid such as fracturing fluid in pit shaft, make pressure in the cavity of hydraulic anchor body 1 increase, from
And allow the cavity within hydraulic anchor body 1 and between hydraulic anchor outside formed pressure differential, inner sleeve 3 can be under the effect of pressure differential
It is directed the outside of hydraulic anchor body 1, and anchor tooth 4 can be driven to stretch out from anchor tooth hole 11, and extend to the end in inner sleeve 3,
Anchor tooth 4 continues relative inner sleeve 3 and slides and stretch out, and finally makes anchor tooth 4 top be engaged on the shaft in wall of pipe well, it is achieved hydraulic anchor
Grappling.Concrete, anchor tooth 4 the one end outside body 1 is provided with anchor palm, anchor palm can increase anchor tooth 4 and the borehole wall it
Between frictional force, it is ensured that hydraulic anchor carry out anchor hang time fastness.
Additionally, be provided with elastic component 2 in the outside of hydraulic anchor body 1, elastic component 2 is pressed on anchor tooth 4 towards outside body 1
One end, so when hydraulic anchor body 1 hollow cavity pressure increase, when anchor tooth 4 stretches out from anchor tooth hole 11, can contact and press
Compel the elastic component 2 being arranged on outside hydraulic anchor body 1, make elastic component 2 flare up deformed state.And when the sky of hydraulic anchor body 1
When cavity pressure reduces, anchor tooth 4 can be pushed back in anchor tooth hole 11 by elastic component 2 by its own resilient, thus allows hydraulic anchor release
Anchoring states.
Concrete, the multiple anchor tooth holes 11 on the body 1 of hydraulic anchor can be divided into multiple anchor tooth holes group, in order to make single anchor tooth
Stress less, it is ensured that anchoring effect, the anchor tooth hole number in the group of each anchor tooth hole is identical, and along between body axis direction etc.
Every arrangement.The anchor tooth being so in anchor tooth hole is also evenly distributed on the same straight line identical with pipe well direction with anchor tooth hole
On, the power between hydraulic anchor and the borehole wall can uniformly be shared to multiple anchor teeth, thus hydraulic anchor is effectively ensured to the pipe well borehole wall
Effect hung by anchor.
Meanwhile, in order to allow hydraulic anchor keep stress equalization, group circumferentially direction, the plurality of anchor tooth hole in all directions
Arrangement is on the body.So anchor tooth hole group of different directions can undertake the anchor extension power of tubing string different directions, it is ensured that waterpower
The anchor of tubing string is hung effect by anchor.In the present embodiment, anchor tooth hole group has three groups, and has four anchor teeth in each anchor tooth control group
Hole.
, it is respectively provided with in each anchor tooth hole 11 with spacing to realize the slip of inner sleeve 3 and anchor tooth 4 in each anchor tooth hole 11
Limited location step, limited step is for limiting inner sleeve 3 in the displacement stretching out direction, anchor tooth hole 11.Common, anchor tooth hole can be made
11 is less in the aperture, position outside hydraulic anchor body 1, and relatively big near the aperture, position at body 1 center and less
Aperture is less than inner sleeve 3 largest outer dimension in the direction, thus is formed at smaller aperture due inwall with larger aperture inwall
Limited step.If inner sleeve 3 is when continuing to slide outside anchor tooth hole 11, limited step can block inner sleeve 3, to stop inner sleeve 3
The trend slided is continued, it is to avoid inner sleeve 3 skids off from anchor tooth hole 11 towards this side.
Additionally, concrete, in order to make anchor tooth 4 that the inside of inner sleeve 3 in inner sleeve 3 slidably, can be made to be hollow
Shape structure, and anchor tooth 4 is set in the hollow cavity of inner sleeve 3, one end towards lining 5 of inner sleeve 3 is provided with step, to limit
Anchor tooth 4 is deviate from from this end.During so anchor tooth 4 i.e. may be implemented in inner sleeve 3 slidably, and inner side is stopped by inner sleeve 3, outside quilt
Elastic component 2 is stopped, to avoid anchor tooth 4 to skid off from inner sleeve 3.Because anchor tooth 4 is to be set among the inner chamber of inner sleeve 3, with interior
For being slidably connected between the cavity inner wall of set 3, so hanging operation, when inner sleeve 3 moves to the limit in anchor tooth hole 11 when carrying out anchor
During position, anchor tooth 4 can continue to slide to outer direction, anchor tooth hole 11 under the hydraulic pressure effect within hydraulic anchor, until anchor tooth
4 outer ends are supported and are set and be engaged on pit shaft tube wall.
When fracturing work is complete, when needing the anchor releasing hydraulic anchor to hang state, liquid pressure in the cavity of hydraulic anchor body 1
Power reduces, and anchor tooth 4 loses pressure support, thus can disengage with the borehole wall, now, in order to apply active force to anchor tooth 4, makes anchor
Tooth 4, to hydraulic anchor body 1 central slide, may utilize and is arranged on the elastic component 2 outside body 1, push back anchor tooth 4 to anchor tooth hole
In.Concrete, elastic component 2 can be the leaf spring outside hydraulic anchor that is sticked, and leaf spring is leaf spring, is by no less than multi-disc
The plate-shaped springs of spring steel stack combinations.Can play and compress and the effect of buffering.Leaf spring lies in the body 1 of hydraulic anchor
Outside, and leaf spring one end is with by screw, is connected with hydraulic anchor body such as cruciform slot screw etc., at anchor tooth 4 towards outside body 1
One end of side is correspondingly arranged on the anchor tooth stopper slot for placing leaf spring, and the leaf spring other end i.e. may be provided in anchor tooth stopper slot.
So when anchor tooth 4 stretches out from anchor tooth hole 11, anchor tooth 4 outboard end can be limited by leaf spring, thus avoids outwards continuing
Slideslip, meanwhile, leaf spring produces certain elastic deformation；And when anchor tooth 4 loses the support of fluid pressure differential, leaf spring passes through self
Anchor tooth 4 is pressed back in anchor tooth hole 11 by elastic force, to avoid anchor tooth 4 to be exposed at outside anchor tooth hole 11, and causes hydraulic anchor to take out
Situation occur.
When carrying out fracturing work, this internal fracturing fluid being passed through of hydraulic anchor should be avoided flowing into outside hydraulic anchor, to cause
Hydraulic anchor external and internal pressure subtractive is little, or underground work causes other adverse effect.So, the intrinsic sky of hydraulic anchor should be made
Seal isolation is kept outside chamber and hydraulic anchor.Concrete, can set between the inside edge of inner sleeve 3 and anchor tooth 4 outer ledge
Put sealing ring 6, be also equipped with sealing ring 7 between inwall and inner sleeve 3 outer rim in anchor tooth hole 11 simultaneously.Sealing ring 6 and 7 can be
When anchor tooth 4 and inner sleeve 3 are stretched, anchor tooth hole 11 is all made to keep sealing state, it is to avoid the fracturing fluid etc. being passed through in hydraulic anchor body 1
Liquid flows out from anchor tooth hole 11, or the impurity outside hydraulic anchor enters in hydraulic anchor body 1.Sealing ring 6 and sealing ring 7 are
O.The material of sealing ring 6 and 7 is specifically as follows silica gel ring or rubber ring, and can select ready-made O RunddichtringO
Specification and geomery, to reduce the holistic cost of hydraulic anchor.
Additionally, optional, in order to ensure lining 5 can and body 1 between be relatively fixed, it is to avoid lining 5 from hydraulic anchor this
Centre bore in body 1 skids off, screwed connection between lining 5 and body 1, can be passed through.Concrete, lining 5 outer wall and hydraulic anchor
Be provided with screw thread on the center bore inner wall of body 1, lining 5 sheathed enter in hydraulic anchor body 1 after, screw thread can be passed through between the two
Screw, thus be fixed together.The inwall of the close lower end of the centre bore of body 1 is provided with step, and this step can
To limit lining position in hydraulic anchor body 1, it is to avoid lining 5 skids off in the body 1 of hydraulic anchor.
Having the hydraulic anchor of said structure operationally, its specific works process is as follows:
Hydraulic anchor is connected on huge discharge fracturing string, and sends in well.After starting pressing crack construction, packer is sat
Envelope, oil pipe is inside and outside forms pressure differential, and the inner sleeve 3 of hydraulic anchor can stretch out anchor tooth hole under pressure together with anchor tooth 4 in two-stage type
11, and be anchored on casing wall.Pressure reduction inside and outside oil pipe is the biggest, and anchorage force is the strongest.And hydraulic anchor is because using two-stage type to stretch out,
So hydraulic anchor body 1 is less at the thickness of anchor tooth hole 11 part so that the centre bore internal diameter of body 11, the i.e. latus rectum of hydraulic anchor
Can be relatively big, choke pressure is less, and the gap between the instrument of inside pipe casing and sleeve pipe can be made bigger.After pressure break terminates,
Anchor tooth 4 is retracted under the elastic force effect of outside elastic component 2 automatically, releases anchoring states.
With pressure break discharge capacity (10m3/ min) as a example by, the joint that conventional hydraulic anchor (internal diameter 50mm, external diameter 115mm) can produce
Flowing pressure is 5.3MPa, and the hydraulic anchor (internal diameter 72mm, external diameter 108mm) in the present embodiment can produce choke pressure
1.3MPa, thus reduce operation pressure 4MPa, and gap can increase to monolateral 6.67mm, makes fracturing sand be difficult to deposition, fall
Low sand card risk.
In the present embodiment, hydraulic anchor includes that hollow tube-shape body, lining, inner sleeve, anchor tooth and elastic component, body and lining are equal
For hollow tube-shape, and lining is set in the cavity of body, and body offers multiple anchor tooth hole being perpendicular to axial direction, interior
The quantity of set and anchor tooth is all equal with anchor tooth hole number, and inner sleeve is slidably disposed in anchor tooth hole, and inner sleeve is positioned at outside lining
Side, anchor tooth is slidably disposed in inner sleeve, and inner sleeve, anchor tooth hole and the equal one_to_one corresponding of anchor tooth, and inner sleeve is for by body
When pressure increases in cavity, anchor tooth is driven to stretch out from anchor tooth hole, so that anchor tooth is anchored on pipe well inwall；Elastic component is arranged on this
External side, and it is pressed on anchor tooth one end towards outer body, elastic component, will when empty cavity pressure reduces in the body
Anchor tooth pushes back in anchor tooth hole.So because inner sleeve and anchor tooth stretch for two-stage type in the anchor tooth hole of body, so inner sleeve and anchor
Tooth length in telescopic direction can be less, so the chi that the space for accommodating anchor tooth and inner sleeve of body is in the direction
Very little the least, thus can be under identical this body diameter of hydraulic anchor, it is achieved bigger centre bore aperture.So on the one hand because
The latus rectum of hydraulic anchor can be relatively big, so making choke pressure less, on the other hand, it is possible to make inside pipe casing instrument and sleeve pipe it
Between gap relatively big, thus the fracturing sand avoiding inside pipe casing deposited is blocked.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of
Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment technical scheme.
Claims (9)
1. a hydraulic anchor, it is characterised in that include hollow tube-shape body, lining, inner sleeve, anchor tooth and elastic component, described body
Being hollow tube-shape with described lining, and described lining is arranged in the cavity of described body, described body offers multiple
Be perpendicular to the anchor tooth hole of described body axial direction, the quantity of described inner sleeve and described anchor tooth all with described anchor tooth hole number phase
Deng, described inner sleeve is slidably disposed in described anchor tooth hole, and described inner sleeve is positioned at outside described lining, and described anchor tooth can be slided
Being arranged in described inner sleeve, described inner sleeve, described anchor tooth hole and the described equal one_to_one corresponding of anchor tooth, described inner sleeve is for working as institute dynamicly
When stating pressure increase in the cavity of body, described anchor tooth is driven to stretch out from described anchor tooth hole, so that described anchor tooth is anchored on
Pipe well inwall；Described elastic component is arranged on described outer body, and is pressed on described anchor tooth one end towards described outer body,
Described anchor tooth, for when described body hollow cavity pressure reduces, is pushed back in described anchor tooth hole by described elastic component.
Hydraulic anchor the most according to claim 1, it is characterised in that be provided with limited step in each described anchor tooth hole,
Described limited step for limit described in be enclosed within the displacement stretching out direction, described anchor tooth hole.
Hydraulic anchor the most according to claim 1, it is characterised in that described inner sleeve is hollow cylindrical configuration, and described anchor tooth
Being set in the hollow cavity of described inner sleeve, one end towards described lining of described inner sleeve is provided with step, described to limit
Anchor tooth is deviate from from this end.
Hydraulic anchor the most according to claim 1, it is characterised in that one end towards described outer body of described anchor tooth sets
Being equipped with anchor tooth stopper slot, described elastic component is leaf spring, and described leaf spring one end is fixed on described outer body, the described leaf spring other end
It is arranged in described anchor tooth stopper slot.
Hydraulic anchor the most according to claim 1, it is characterised in that between described inner sleeve and described anchor tooth, and described anchor
It is provided with sealing ring between tooth hole and described inner sleeve.
Hydraulic anchor the most according to claim 1, it is characterised in that one end towards described outer body of described anchor tooth sets
It is equipped with anchor palm.
Hydraulic anchor the most according to claim 1, it is characterised in that described lining and described body pass through screwed connection.
Hydraulic anchor the most according to claim 1, it is characterised in that the plurality of anchor tooth hole is divided into multiple anchor tooth holes group, often
The interior anchor tooth hole number of individual described anchor tooth hole group is identical, and arranges at equal intervals along described body axis direction.
Hydraulic anchor the most according to claim 8, it is characterised in that group circumferentially direction, the plurality of anchor tooth hole is arranged in institute
State on body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620799148.0U CN205858230U (en) | 2016-07-26 | 2016-07-26 | Hydraulic anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620799148.0U CN205858230U (en) | 2016-07-26 | 2016-07-26 | Hydraulic anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205858230U true CN205858230U (en) | 2017-01-04 |
Family
ID=57649368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620799148.0U Active CN205858230U (en) | 2016-07-26 | 2016-07-26 | Hydraulic anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205858230U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965951A (en) * | 2019-11-27 | 2020-04-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Large-drift-diameter hydraulic anchor and using method thereof |
-
2016
- 2016-07-26 CN CN201620799148.0U patent/CN205858230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965951A (en) * | 2019-11-27 | 2020-04-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Large-drift-diameter hydraulic anchor and using method thereof |
| CN110965951B (en) * | 2019-11-27 | 2024-01-23 | 中国石油天然气集团有限公司 | Large-drift-diameter hydraulic anchor and use method thereof |
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