CN202914000U - Centralizing and anchoring device used for horizontal open hole - Google Patents
Centralizing and anchoring device used for horizontal open hole Download PDFInfo
- Publication number
- CN202914000U CN202914000U CN 201220612457 CN201220612457U CN202914000U CN 202914000 U CN202914000 U CN 202914000U CN 201220612457 CN201220612457 CN 201220612457 CN 201220612457 U CN201220612457 U CN 201220612457U CN 202914000 U CN202914000 U CN 202914000U
- Authority
- CN
- China
- Prior art keywords
- hinge type
- anchoring device
- central tube
- piston
- righting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a centralizing and anchoring device used for a horizontal open hole. The centralizing and anchoring device used for the horizontal open hole comprises an upper connector and a lower connector, wherein the upper connector and the lower connector are respectively arranged at two ends of the outer side of a central pipe. Hydraulic cylinders are defined between the upper connector and the lower connector through positioning rings of the upper connection and the lower connector. Notches used for arranging hinge type anchor bolts are formed in the two hydraulic cylinders. Pistons are arranged in the hydraulic cylinders. The inner end faces of the pistons are connected with the hinge type anchor bolts. Cover plates are arranged on the peripheral walls of the hinge type anchor bolts. One-way locking rings are arranged on the inner lateral walls of the pistons, wherein the one-way locking rings are matched with saw-tooth threads on the central pipe. The pistons move in the opposite directions under the action of hydraulic pressure. A plurality of anchor bolt component stress protrusions are arranged in the middles of the two pistons in the circumferential direction, wherein the anchor bolt component stress protrusions are composed of hinges. The top ends of the anchor bolts can play a role in centralizing and anchoring a fracture pipe column, particularly a packer, from contacting with a well wall to being inserted into the rock of the well wall. The centralizing and anchoring device used for the horizontal open hole can effectively prevent the packer from moving in a fracturing process and plays an important role in protecting a robber sleeve of a packer and preventing an oil pipe from being snapped.
Description
Technical field
The utility model belongs to the downhole tool of petroleum gas (comprising shale gas) mining level open hole well completion and makes the field, is specifically related to a kind of righting anchoring device that horizontal bare hole well packing staged fracturing is transformed that is applied to.
Background technology
The horizontal well completion technology is to improve the advanced technology of well yield and the hypotonic oil gas field of Efficient Development, transformation for the horizontal well Open-Hole Section, publication number CN 101560877A, open day be on October 21st, 2009 Chinese patent literature and on January 19th, 2011 issued patents number be 201020246107.1 patent documentations, horizontal well packer staged fracturing technology tube pillar and tubular column for horizontal well barefoot well completion staged fracturing acidizing tool are used widely at present and are approved.
Transform for horizontal bare hole well staged fracturing at present, multiple technologies measure and corresponding downhole tool are arranged.Weigh the advantages and disadvantages, using maximum is fracturing string by a plurality of packers serial connections.In pressing crack construction, packer could be implemented staged fracturing after setting, in the horizontal bare hole well, the packer tubing string is because gravity, be pressed in edge under the well, only have packer righting (near borehole axis) packer could effectively be set, existing centralizer is borrowed from the sleeve pipe straight well, be not suitable with horizontal bare hole well condition, effect is unsatisfactory.
The relative Wall of Cased Hole of the bore hole borehole wall under high pressure easily caves in, and the normal operation of tubing string and instrument is impacted, so use necessary grappling means on the tubing string, prevents that the variation of pressure causes that tubing string is flexible in the work progress, affects application life.Generally be to use sleeve pipe anchor such as hydraulic anchor etc. at casing section.On August 4th, 2004 issued patents 03264505.8 oil pipe anchoring device and January in 2005 issued patents 03214346.X on the 19th safety anchoring device for small well hole.Adopt anchor fluke or slips to realize smoothly lower grappling behind the precalculated position of oil pipe, can effectively prevent elongation and the shortening of oil pipe, can effectively solve the fixation problem of cased well down-hole string.But the well that be not suitable for all that the borehole wall is irregular, the tubing string between two packers of the vicissitudinous Luo Yan of hole diameter Bowl section will bear very large pulling force.
In fracturing process piecemeal, take 31/2 " external upset tubing be example; elongation rate is about more than 20/00 during pressure break; the packing element that has set bears huge radial load; when oil pipe elongation drives packing element and moves axially; rock of borehole will be destroyed packing element, causes packer setting successfully but packing element leakage during pressure break.In addition, tubing string during pressure break may make oil pipe break or screw thread dropout (generation of several similar accidents has been arranged) because the pulling force of the elongation effect that hydraulic pressure produces acts directly on oil pipe and the screw thread.Resolve the grappling of packer and tubing string, can avoid the generation of this type of accident.But existing hydraulic anchor and the slips that is used for cased well can not adaptation level open hole well condition.
The utility model content
The utility model proposes a kind of design that makes the effective righting of fracturing string and grappling for the grappling problem of existing level open hole well packing fracturing strings in pressing crack construction.
The technical scheme that its technical problem that solves the utility model adopts is:
Be applied to the righting anchoring device of horizontal bare hole well, comprise the top connection and the lower contact that are arranged at respectively two ends, the central tube outside, locating ring by separately respectively is limited with a hydraulic cylinder respectively between described top connection and lower contact, has the gap of fastening be used to the hinge type anchor is set between described two hydraulic cylinders; Be provided with piston in the described hydraulic cylinder, piston inner face and hinge type crab-bolt are joined; Be provided with cover plate on the periphery wall of described hinge type crab-bolt; Described piston inside wall is provided with the unidirectional lock ring that matches with saw-tooth thread on the central tube.Inside and outside its unidirectional lock ring saw-tooth thread is arranged, leave gap so that performance elasticity.Consist of one-way locking mechanism by screw thread between central tube, lock ring and the piston.
Further, in the utility model device:
Described along between two piston inner faces, the circumferential of central tube be provided with a plurality of hinge type crab-bolts; Described hinge type crab-bolt is made of the scissors tooth that pin connects a pair of symmetrical structure, and the scissors tooth crown of a plurality of hinge type crab-bolts is arranged along central tube circle wall direction.
Described unidirectional lock ring is the double cog structure, and one end tooth and central tube join, other end tooth and piston inside wall one way engagement.
In the described hydraulic cylinder, hydraulic cylinder and central tube joint be respectively arranged with sealing ring.
Described hinge type crab-bolt is taked the cast steel material preparation.
Under hydraulic action, piston is done relative motion, assembly is fastened along the anchor that circumference is provided with a plurality of hinges formations in two piston centres, it can be when the piston move toward one another, the pressurized protuberance, anchor is fastened crown can be from the contact borehole wall to the rock that embeds the borehole wall, and the one-way lock ring lock that matches with saw-tooth thread on the central tube by the piston inside wall is calmly, thus to fracturing string particularly packer play righting and grappling effect.It can effectively prevent the play of packer in the fracturing process, to the protecting packer packing element, prevent that oil pipe from breaking most important.
This device is owing to having used hydraulic coupling (rather than elastic force), and piston can obtain 12 to 28 tons thrust, and along with the protuberance that anchor is fastened, anchor is fastened angle can be more and more less, and anchor is fastened can be increasing to the normal pressure of the borehole wall, even surpass piston thrust.In addition, owing to having adopted the design of biliquid cylinder, two anchors are fastened stressed equating, this has just ensured making a concerted effort all the time in the normal direction of the borehole wall of hinge fulcrum, and this fastens the embedding borehole wall for righting tubing string and anchor, realizes that grappling all is favourable.Can also adjust anchor and fasten length according to borehole wall lithology, reach best righting anchoring effect.
Description of drawings
Accompanying drawing 1 is righting anchoring device assembling drawing.
Accompanying drawing 2 is one-way locking mechanism enlarged drawings.
Among the figure, 1, top connection, 2, central tube, 3, locating ring, 4, sealing ring, 5, cover plate, 6, the hinge type anchor fastens, 7, piston (dash area represents locking screw), 8, hydraulic cylinder, 9, unidirectional lock ring, 10, lower contact.
The specific embodiment
As shown in Figure 1, this is applied to the righting anchoring device of horizontal bare hole well, comprise the top connection 1 and the lower contact 10 that are arranged at respectively two ends, central tube 2 outside, between top connection 1 and the lower contact 10 respectively the locating ring 3 by separately respectively be limited with to have between 8, two hydraulic cylinders 8 of a hydraulic cylinder be used to the hinge type anchor is set and fasten 6 gap; Be provided with piston 7 in the hydraulic cylinder 8, piston 7 inner faces and hinge type crab-bolt 6 are joined; Be provided with cover plate 5 on the periphery wall of hinge type crab-bolt 6; Piston 7 inside walls are provided with the unidirectional lock ring 9 that matches with saw-tooth thread on the central tube 2.Be provided with cover plate 5 on the periphery wall of hinge type crab-bolt 6.In the hydraulic cylinder 8, hydraulic cylinder 8 is provided with sealing ring 4 with central tube 2 joints.
In this device, along between two piston 7 inner faces, the circumferential of central tube 2 be provided with 4-12 hinge type crab-bolt 6.Wherein, hinge type crab-bolt 6 is made of the scissors tooth that pin connects a pair of symmetrical structure, and the scissors tooth crown of 4-12 hinge type crab-bolt 6 is arranged along central tube 2 circle wall directions.
As shown in Figure 2, unidirectional lock ring 9 is the double cog structure, and one end tooth and central tube 2 join, other end tooth and piston 7 inside wall one way engagement, thus play locking action.
The utility model is respectively equipped with a top connection and lower contact 10 at the two ends of central tube 2, locating ring 3 near joint, define the position of hydraulic cylinder 8, be provided with two pistons 7 that can make move toward one another in the hydraulic cylinder 8, the outer end of piston 7 is limited by the step of hydraulic cylinder 8, so that by the hydraulic pressure in the pressure transmission hole adopter on the central tube 2, inboard, piston 7 two ends has saw-tooth thread to cooperate with one-way locking ring 9, in order to realize the one-way locking function with the saw-tooth thread on the central tube 2.Piston 7 interior end in contact hinge type anchors fasten 6, and hydraulic cylinder 2 relevant positions have gap, and protuberance is prominent to the borehole wall thus so that the hinge type anchor fastens 6, gap is provided with cover plate 5 during installation, prevent that the hinge type anchor from fastening 6 and dropping when inoperative, and when work, the hinge type anchor that cover plate 5 is swelled is fastened 6 and is burst.
One-way locking ring and piston are installed in shown position on the central tube, in the situation that fixed piston inner face distance is inserted in hydraulic cylinder, make two hydraulic cylinder gap alignment, the anchor of packing in the gap is fastened, and builds cover plate, screw in respectively locating ring and upper lower contact at the central tube two ends, finish assembling.
During sampling observation, seal any end joint, suppress in other end joint, can observe anchor and fasten the protuberance process, anchor fasten close up fully after, pressure release.Push hard anchor and fasten the part of giving prominence to outside cylinder body, checking one-way locking function.
The hinge type anchor component adopts cast steel material ZG34Cr-NiMo preparation, to guarantee to possess enough hardness and intensity.
Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model; can not assert that the specific embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine scope of patent protection by claims of submitting to.
Claims (5)
1. be applied to the righting anchoring device of horizontal bare hole well, it is characterized in that: comprise the top connection (1) and the lower contact (10) that are arranged at respectively two ends, central tube (2) outside, locating ring (3) by separately respectively is limited with a hydraulic cylinder (8) respectively between described top connection (1) and lower contact (10), has between described two hydraulic cylinders (8) be used to the gap that the hinge type anchor is set fastens (6); Be provided with piston (7) in the described hydraulic cylinder (8), piston (7) inner face and hinge type crab-bolt (6) are joined; Be provided with cover plate (5) on the periphery wall of described hinge type crab-bolt (6); Described piston (7) inside wall is provided with the unidirectional lock ring (9) that matches with saw-tooth thread on the central tube (2).
2. the righting anchoring device that is applied to the horizontal bare hole well according to claim 1 is characterized in that: described along between two pistons (7) inner face, the circumferential a plurality of hinge type crab-bolts (6) that are provided with of central tube (2); Described hinge type crab-bolt (6) is made of the scissors tooth that pin connects a pair of symmetrical structure, and the scissors tooth crown of a plurality of hinge type crab-bolts (6) is arranged along central tube (2) circle wall direction.
3. the righting anchoring device that is applied to the horizontal bare hole well according to claim 1 is characterized in that: described unidirectional lock ring (9) is the double cog structure, and one end tooth and central tube (2) join, other end tooth and piston (7) inside wall one way engagement.
4. the righting anchoring device that is applied to the horizontal bare hole well according to claim 1 is characterized in that: in the described hydraulic cylinder (8), hydraulic cylinder (8) is respectively arranged with sealing ring (4) with central tube (2) joint.
5. the righting anchoring device that is applied to the horizontal bare hole well according to claim 1 is characterized in that: described hinge type crab-bolt (6) is taked the cast steel material preparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612457 CN202914000U (en) | 2012-11-16 | 2012-11-16 | Centralizing and anchoring device used for horizontal open hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612457 CN202914000U (en) | 2012-11-16 | 2012-11-16 | Centralizing and anchoring device used for horizontal open hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914000U true CN202914000U (en) | 2013-05-01 |
Family
ID=48162321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220612457 Expired - Fee Related CN202914000U (en) | 2012-11-16 | 2012-11-16 | Centralizing and anchoring device used for horizontal open hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202914000U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913161A (en) * | 2012-11-16 | 2013-02-06 | 西安鼎盛石油科技有限责任公司 | Straightening and anchoring device applied to horizontal open hole well |
| CN111364935A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
-
2012
- 2012-11-16 CN CN 201220612457 patent/CN202914000U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913161A (en) * | 2012-11-16 | 2013-02-06 | 西安鼎盛石油科技有限责任公司 | Straightening and anchoring device applied to horizontal open hole well |
| CN111364935A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN111364935B (en) * | 2018-12-25 | 2022-06-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104373145B (en) | Embedded classification constant-resistance shearing resistance large deformation anchor and method | |
| CN102337860B (en) | Packer | |
| CN202560158U (en) | Drillable Composite Bridge Plug | |
| BRPI0502058B1 (en) | cushioned and reinforced recoverable plug for intubated wells | |
| CN205743821U (en) | A kind of thermal packer | |
| CN206830123U (en) | A kind of HTHP packer of band elasticity deblocking ratchet and balance bypass | |
| CN202914000U (en) | Centralizing and anchoring device used for horizontal open hole | |
| CN109798087A (en) | A kind of retrievable hanging packer of double packing elements | |
| CN110617026B (en) | Downhole operation device and method | |
| CN203978373U (en) | Hydraulic setting presses down deblocking packer | |
| CN201818277U (en) | Compression type open hole packer | |
| CN205117286U (en) | Forcefully opening tool for subsurface safety valve | |
| CN102913161A (en) | Straightening and anchoring device applied to horizontal open hole well | |
| CN106194103A (en) | Callable crowded ash bridging plug | |
| CN114809980A (en) | Hydraulic temporary bridge plug | |
| CN202117618U (en) | High temperature and high pressure resistance open hole hook wall packer | |
| CN113236163B (en) | Mechanical rotary setting type leather cup packer | |
| CN116291215A (en) | Self-locking reaming-while-drilling device and application thereof | |
| CN204851208U (en) | Sliding sleeve packer staged fracturing device | |
| CN108825166A (en) | A kind of novel water injection packer | |
| CN216197978U (en) | Suspension packer | |
| CN205445541U (en) | A drillable packer that is used for deep gas well fracturing to put into production integration construction | |
| CN103174398B (en) | A kind of drillable press-fracturing bridge plug | |
| CN103104213A (en) | High-temperature high-pressure testing packer | |
| CN117536578B (en) | Permanent packing device for underground reservoir and setting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20161116 |