CN203296716U - Hydraulic casing centralizer - Google Patents
Hydraulic casing centralizer Download PDFInfo
- Publication number
- CN203296716U CN203296716U CN2013203100977U CN201320310097U CN203296716U CN 203296716 U CN203296716 U CN 203296716U CN 2013203100977 U CN2013203100977 U CN 2013203100977U CN 201320310097 U CN201320310097 U CN 201320310097U CN 203296716 U CN203296716 U CN 203296716U
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- China
- Prior art keywords
- wiper block
- piston
- fixed cover
- top connection
- rail joint
- 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
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- 239000011148 porous material Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The utility model discloses a fluid pressure type sleeve pipe centralizer, including top connection, righting piece, piston, fixed cover, rail joint and lower clutch, top connection and lower clutch fixed connection are provided with the intercommunicating pore on the top connection, and righting piece and piston all cup joint on top connection, and rail joint fixed cover is established on top connection, and righting piece and piston fixed connection, rail joint and righting piece cooperation make the piece of righting stretch out, and piston connection has and is used for carrying out spacing self-locking mechanism to the piece of righting after stretching out, and fixed cover is fixed on the lower clutch, and self-locking mechanism is connected through the level pressure shear pin with fixed cover. The utility model discloses being gone into together with the sleeve pipe, after reacing the design position, suppressing pressure and stretching out and the auto-lock to the setting value piece of righting, make its and the contact of pit shaft inner wall, make the sleeve pipe of connecting on it placed in the middle in the pit shaft, make the cement sheath even to guarantee horizontal well cementing quality.
Description
Technical field
The utility model relates to horizontal well casing job equipment, relates in particular to a kind of hydraulic casing centralizer, makes connection sleeve pipe thereon placed in the middle in pit shaft, improves cementing quality.
Background technology
Horizontal well development has become the main flow of present oil and gas development.The cementing quality relation of horizontal well the success or failure of later stage pressing crack construction and formation testing gas testing.Yet one of principal element that affects the horizontal cementing quality is that the sleeve pipe of horizontal segment is not placed in the middle.Generally adopt at present rigid centralizer for casing and rolling wheel centralizer etc. in casing job.For example, China Patent No. " CN201220337888.4 " discloses a kind of hydraulic centralizing device, to design for the purpose that improves drilling fluid and reinforcement cementing quality, namely at the centralizer cylinder inboard wall, be provided with lifter cavity with central through hole, the lifter cavity inwall connects seal gasket, righting arm is set in lifter cavity, and the righting arm tail end passes the lifter cavity central through hole, and the righting arm tail end is provided with pin.When this hydraulic centralizing device enters well, righting arm is contraction state, and it is little that bunch tube is lowered to resistance, behind precalculated position, bruising after replacement cement, in sleeve pipe, the disconnected pin of crush-cutting, make the stressed backward external expansion of righting arm to the supporting positive cover tube wall, reaches the effect that improves cementing quality.
But smooth when guaranteeing lower tubular column, the maximum outside diameter of rigid centralizer is often than the little 6-8 millimeter of borehole wall size, therefore can there is certain gap between rigid centralizer and the borehole wall, so there is equally the sleeve pipe problem not placed in the middle of horizontal segment, can not well play the effect of righting to sleeve pipe, often cause the well cementation defect.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that the existing level well exists with casing stabbing board, a kind of hydraulic casing centralizer is provided, the utility model and sleeve pipe are lowered to together, after arriving design attitude, building the pressure, wiper block stretches out and self-locking to setting value, and it is contacted with shaft in wall, makes connection sleeve pipe thereon placed in the middle in pit shaft, make cement sheath even, thereby guarantee the horizontal cementing quality.
For achieving the above object, the technical solution adopted in the utility model is as follows:
a kind of hydraulic casing centralizer, it is characterized in that: comprise top connection, wiper block, piston, fixed cover, rail joint and lower contact, described top connection is fixedly connected with lower contact, be provided with intercommunicating pore in top connection, wiper block and piston all are socketed in top connection, the rail joint fixed cover is located in top connection, wiper block is fixedly connected with piston, rail joint coordinates wiper block is stretched out with wiper block, piston is connected with for the wiper block to after stretching out and carries out spacing self-locking mechanism, fixed cover is fixed in lower contact, self-locking mechanism is connected by the level pressure shear pin with fixed cover.
Described self-locking mechanism comprises lock pawl and the lock tube that coordinates with the lock pawl, and described lock pawl is fixed in lower contact, and lock tube is fixedly connected with piston by sheath, and lock tube is connected by the level pressure shear pin with fixed cover.
Described lock tube inside is provided with the sawtooth button, and lock pawl surface correspondence is provided with the sawtooth button, and lock tube sawtooth button coordinates self-locking with lock pawl sawtooth button.
Also be provided with safeties in described lower contact, described safeties carry out spacing spacing ring for being used for to the lock pawl, and described spacing ring fixed cover is located in lower contact and is positioned at lock pawl below.
Described rail joint surface is provided with the inclined-plane track, and wiper block inner surface correspondence is provided with the inclined-plane track, and when wiper block stretched out, the inclined-plane track of wiper block moved on the inclined-plane of rail joint track.
Employing the utility model has the advantage of:
one, in the utility model, be provided with intercommunicating pore in top connection, highly pressurised liquid is entered from the intercommunicating pore of top connection, wiper block and piston all are socketed in top connection, the rail joint fixed cover is located in top connection, wiper block is fixedly connected with piston, rail joint coordinates wiper block is stretched out with wiper block, piston is connected with for the wiper block to after stretching out and carries out spacing self-locking mechanism, fixed cover is fixed in lower contact, self-locking mechanism is connected by the level pressure shear pin with fixed cover, adopt this structure, reach the setting value of level pressure shear pin when instrument inside and outside differential pressure value, the level pressure shear pin is cut off, make wiper block up, wiper block is protruding in up makes it with shaft in wall, contact, played the effect of righting sleeve pipe, self-locking mechanism has been realized the mechanical type self-locking simultaneously, even there is no pressure reduction inside and outside instrument, wiper block can not retracted yet, make connection sleeve pipe thereon placed in the middle in pit shaft, make cement sheath even, thereby guarantee the horizontal cementing quality.
Two, in the utility model, described self-locking mechanism comprises lock pawl and the lock tube that coordinates with the lock pawl, described lock pawl is fixed in lower contact, lock tube is fixedly connected with piston by sheath, and lock tube is connected by the level pressure shear pin with fixed cover, adopts this structure, when the level pressure shear pin is cut off, wiper block, piston, sheath and lock tube are up together, have guaranteed that wiper block is protruding, and the level pressure shear pin reliability of cutting off.
Three, in the utility model, described lock tube inside is provided with the sawtooth button, and lock pawl surface correspondence is provided with the sawtooth button, and lock tube sawtooth button coordinates self-locking with lock pawl sawtooth button, adopts this structure to improve the reliability of mechanical self-latching.
Four, in the utility model, also be provided with safeties in described lower contact, described safeties carry out spacing spacing ring for being used for to the lock pawl, described spacing ring fixed cover is located in lower contact and is positioned at lock pawl below, spacing ring is as the secondary fuse device, can carry out the secondary mechanical self-locking to the lock pawl, guarantee no longer to retract after wiper block stretches out.
Five, in the utility model, described rail joint surface is provided with the inclined-plane track, wiper block inner surface correspondence is provided with the inclined-plane track, when wiper block stretches out, the inclined-plane track of wiper block moves on the inclined-plane of rail joint track, adopt this structure, wiper block can be stretched out when moving upward, complete shaft in wall is contacted.
Six, the utility model can be suitable reduces Frictional Drag of Casing Running, and breakdown action is flexible, adopts hydraulic pressure placed in the middle, and uprighting force is large, and righting is effective; Be applicable to the horizontal well casing job, well inner sleeve placed in the middle before well cementation.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 is the partial enlarged drawing in Fig. 1
Be labeled as in figure: 1, top connection; 2, rail joint; 3, wiper block; 4, piston; 5, intercommunicating pore; 6, sheath; 7, lock pawl; 8, spacing ring; 9, lock tube; 10, level pressure shear pin; 11, fixed cover; 12, lower contact.
The specific embodiment
Embodiment 1
a kind of hydraulic casing centralizer, comprise top connection 1, wiper block 3, piston 4, fixed cover 11, rail joint 2 and lower contact 12, described top connection 1 is fixedly connected with lower contact 12, be provided with intercommunicating pore 5 in top connection 1, wiper block 3 and piston 4 all are socketed in top connection 1, rail joint 2 fixed covers are located in top connection 1, wiper block 3 is fixedly connected with piston 4, rail joint 2 coordinates wiper block 3 is stretched out with wiper block 3, piston 4 is connected with for the wiper block 3 to after stretching out and carries out spacing self-locking mechanism, fixed cover 11 is fixed in lower contact 12, self-locking mechanism is connected by level pressure shear pin 10 with fixed cover 11.
In the utility model, described self-locking mechanism comprises lock pawl 7 and the lock tube 9 that coordinates with lock pawl 7, and described lock pawl 7 is fixed in lower contact 12, and lock tube 9 is fixedly connected with piston 4 by sheath 6, and lock tube 9 is connected by level pressure shear pin 10 with fixed cover 11.
In the utility model, described lock tube 9 inside are provided with the sawtooth button, and the surperficial correspondence of lock pawl 7 is provided with the sawtooth button, and lock tube sawtooth button coordinates self-locking with lock pawl sawtooth button.
In the utility model, also be provided with safeties in described lower contact 12, described safeties carry out spacing spacing ring 8 for being used for to lock pawl 7, and described spacing ring 8 fixed covers are located in lower contact 12 and are positioned at lock pawl 7 belows.
In the utility model, described rail joint 2 surfaces are provided with the inclined-plane track, and wiper block 3 inner surface correspondences are provided with the inclined-plane track, and when wiper block 3 stretched out, the inclined-plane track of wiper block 3 moved on the inclined-plane of rail joint 2 track.
Embodiment 2
Hydraulic casing centralizer, its external diameter, less than rigid centralizer, facilitate being lowered to of tubing string, are lowered to after design attitude and wiper block are stretched out and self-locking, realize making sleeve pipe placed in the middle in well to the righting of sleeve pipe.Comprise top connection 1, rail joint 2, wiper block 3, piston 4, sheath 6, lock pawl 7, spacing ring 8, lock tube 9, level pressure shear pin 10, fixed cover 11, lower contact 12.The top connection 1 that is provided with intercommunicating pore 5 is connected with lower contact 12; Rail joint 2 is fixed in top connection 1; Wiper block 3 with wiper block 3 is inserted after the open slot of piston 4 is connected the dovetail groove inclined-plane track of rail joints 2; Sheath 6 is to connect piston 4 and lock tube 9, and wherein there is the sawtooth button lock tube 9 inside; Lock pawl 7 and fixed cover 11 are fixed in lower contact 12, wherein lock pawl 7 and are milled with several flutings, and the front end cylindrical has the sawtooth button; Only with level pressure shear pin 10, connect between lock tube 9 and fixed cover 11; Spacing ring 8 is safeties.
Operating principle of the present utility model is: highly pressurised liquid enters from the intercommunicating pore 5 of top connection 1, and the instrument inside and outside differential pressure reach level pressure shear pin 10 cut off force value after, level pressure shear pin 10 is cut off; Wiper block 3, piston 4, sheath 6 and lock tube 9 are together to the large end motion of rail joint 2, and wiper block 3 stretches out under the effect of the dovetail groove inclined-plane of rail joint 2 track; Lock simultaneously pawl 7 and inwardly receive and enter lock tube 9, the sawtooth button phase interlock of lock tube and lock pawl has realized the mechanical type self-locking, even there is no pressure reduction inside and outside instrument, wiper block can not retracted yet.If self-locking mechanism lost efficacy, spacing ring can carry out the secondary mechanical self-locking to the lock pawl, guarantees no longer to retract after wiper block stretches out.
Claims (5)
1. hydraulic casing centralizer, it is characterized in that: comprise top connection (1), wiper block (3), piston (4), fixed cover (11), rail joint (2) and lower contact (12), described top connection (1) is fixedly connected with lower contact (12), be provided with intercommunicating pore (5) in top connection (1), wiper block (3) and piston (4) all are socketed in top connection (1), rail joint (2) fixed cover is located in top connection (1), wiper block (3) is fixedly connected with piston (4), rail joint (2) coordinates wiper block (3) is stretched out with wiper block (3), piston (4) is connected with for the wiper block to after stretching out (3) and carries out spacing self-locking mechanism, fixed cover (11) is fixed in lower contact (12), self-locking mechanism is connected by level pressure shear pin (10) with fixed cover (11).
2. hydraulic casing centralizer according to claim 1, it is characterized in that: described self-locking mechanism comprises lock pawl (7) and the lock tube (9) that coordinates with lock pawl (7), described lock pawl (7) is fixed in lower contact (12), lock tube (9) is fixedly connected with piston (4) by sheath (6), and lock tube (9) is connected by level pressure shear pin (10) with fixed cover (11).
3. hydraulic casing centralizer according to claim 2, it is characterized in that: described lock tube (9) inside is provided with the sawtooth button, the surperficial correspondence of lock pawl (7) is provided with the sawtooth button, lock tube sawtooth button with lock pawl sawtooth button and coordinate self-locking.
4. hydraulic casing centralizer according to claim 3, it is characterized in that: also be provided with safeties in described lower contact, described safeties carry out spacing spacing ring (8) for being used for to lock pawl (7), and described spacing ring (8) fixed cover is located at lower contact (12) upward and is positioned at lock pawl (7) below.
5. 2,3 or 4 described hydraulic casing centralizers according to claim 1,, it is characterized in that: described rail joint (2) surface is provided with the inclined-plane track, wiper block (3) inner surface correspondence is provided with the inclined-plane track, while stretching out, the inclined-plane track of wiper block moves on the inclined-plane of rail joint track when wiper block (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203100977U CN203296716U (en) | 2013-05-31 | 2013-05-31 | Hydraulic casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203100977U CN203296716U (en) | 2013-05-31 | 2013-05-31 | Hydraulic casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203296716U true CN203296716U (en) | 2013-11-20 |
Family
ID=49572734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203100977U Expired - Fee Related CN203296716U (en) | 2013-05-31 | 2013-05-31 | Hydraulic casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203296716U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033115A (en) * | 2014-05-20 | 2014-09-10 | 廊坊市志宏协佳石油技术有限公司 | Casing pipe centered locator and working method thereof |
| CN105221084A (en) * | 2015-10-29 | 2016-01-06 | 中国石油集团渤海钻探工程有限公司 | A kind of Wedged hydraulic centralizing device |
| CN109236201A (en) * | 2018-10-30 | 2019-01-18 | 中国石油天然气股份有限公司 | Centering guide |
-
2013
- 2013-05-31 CN CN2013203100977U patent/CN203296716U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033115A (en) * | 2014-05-20 | 2014-09-10 | 廊坊市志宏协佳石油技术有限公司 | Casing pipe centered locator and working method thereof |
| CN104033115B (en) * | 2014-05-20 | 2019-11-29 | 廊坊市志宏协佳石油技术有限公司 | A kind of casing centralization locator and its working method |
| CN105221084A (en) * | 2015-10-29 | 2016-01-06 | 中国石油集团渤海钻探工程有限公司 | A kind of Wedged hydraulic centralizing device |
| CN109236201A (en) * | 2018-10-30 | 2019-01-18 | 中国石油天然气股份有限公司 | Centering guide |
| CN109236201B (en) * | 2018-10-30 | 2020-05-08 | 中国石油天然气股份有限公司 | Centering guide |
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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 |
Granted publication date: 20131120 Termination date: 20180531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |