CN203835289U - Shale gas horizontal well casing centralizer - Google Patents
Shale gas horizontal well casing centralizer Download PDFInfo
- Publication number
- CN203835289U CN203835289U CN201420107156.5U CN201420107156U CN203835289U CN 203835289 U CN203835289 U CN 203835289U CN 201420107156 U CN201420107156 U CN 201420107156U CN 203835289 U CN203835289 U CN 203835289U
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- Prior art keywords
- retaining
- pin thread
- wall
- spring leaf
- piston
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Abstract
The utility model discloses a shale gas horizontal well casing centralizer. The shale gas horizontal well casing centralizer comprises a body, a coupling arranged at one end of the body, a cylinder arranged on the body in a sleeved mode, a piston, a retaining female buckle, a retaining male buckle and a centralizing spring piece, wherein the piston, the retaining female buckle, the retaining male buckle and the centralizing spring piece are movably arranged on the body in a sleeved mode, one end of a shearing pin is arranged in the piston, the other end of the shearing pin is arranged in the body, a stop ring is arranged on the outer wall of the body, one end of the cylinder makes contact with one end of the coupling, and the other end of the cylinder makes contact with one lateral wall of the stop ring; one end of the retaining female buckle makes contact with the piston, and the other end of the retaining female buckle makes contact with one end of the centralizing spring piece; the other end of the centralizing spring piece makes contact with the retaining male buckle, and the other end of the retaining male buckle makes contact with the lateral wall, making contact with the cylinder, of the stop ring; the end, making contact with the coupling, of the cylinder is provided with an inner stop ring, and the inner stop ring makes contact with the outer wall of the body. Compared with the prior art, the centralizing degree of a casing can be effectively improved, the well cementation quality is improved, and the well cementation effect is obvious especially for a horizontal well; the length of the spring piece can be adjusted to achieve close attach with the well wall; a plurality of sealing rings are arranged between the body and the cylinder, and the reliability is high; a one-way locking structure is arranged between the body and the cylinder, so that looseness is prevented effectively.
Description
Technical field
The utility model relates to a kind of shale gas Horizontal well casing centering device for petroleum gas well cementing operation, and it adopts hydraulic power, can realize and steadily strut spring leaf, is close to the borehole wall, and drilling fluid is guaranteed.
Background technology
In recent years along with the increase to oil demand, the quality of cementing quality counts for much, particularly shale gas reservoir mostly is low porosity and low permeability, need to take the well stimulations such as pressure break to link up intrinsic fracture, so very high to the requirement of cementing quality, while using conventional centralizer to carry out casing cementing, exist centralizer not high, cement sheath became uneven during well cementation, cementing quality is inferior; Centralizer external diameter is larger, is having a strong impact on the safety that is lowered to of sleeve pipe.Therefore, the use of centralizer is seriously restricting the safety that is lowered to of the cementing quality of casing cementing and sleeve pipe.Use which type of centralizer, how just can make casing centralization, thereby improve cementing quality, become research topic.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of be convenient to the improve centralizer of sleeve pipe, the shale gas Horizontal well casing centering device that employing hydraulic pressure provides power are provided, it can either reduce to be lowered to resistance by sleeve pipe, effectively prevent that common centralizer from pushing away sand and causing sand plug, problem that cannot turn on pump, the steady reducing that can realize again spring leaf, is guaranteed casing centralization.
The purpose of this utility model is achieved through the following technical solutions: a kind of shale gas Horizontal well casing centering device, comprising: body, be located at the box cupling of body one end; Be sheathed on the cylinder barrel on body, be movably set in piston, retaining box, retaining pin thread, righting spring leaf on body; One shear pin one end is located in piston, and the other end is located in body; Described piston, retaining box, retaining pin thread, righting spring leaf are between inner wall of cylinder and body outer wall, and cylinder barrel is provided with bar hole, during the extrusion of righting spring leaf, from described bar hole, stretch out; The outer wall of described body is provided with baffle ring, and one end of cylinder barrel contacts with one end of box cupling, and the other end contacts with a sidewall of baffle ring; Retaining box one end contacts with piston, and the other end contacts with one end of righting spring leaf; The other end of righting spring leaf contacts with retaining pin thread, and the other end of retaining pin thread contacts with the sidewall contacting with cylinder barrel on baffle ring; The inner wall of end that cylinder barrel contacts with box cupling is provided with inner baffle ring, and inner baffle ring contacts with body outer wall; In the end that body is connected with box cupling, be provided with hydraulic pressure hole, the outlet of described hydraulic pressure hole on body outer wall is positioned at the annular space that inner baffle ring, cylinder barrel, body and piston form.
Further, be all embedded with two inner seal rings in described inner baffle ring and piston, described inner seal ring all contacts with the outer wall of body; In described piston outer wall, be also embedded with two exterior seal rings, the outer wall of described exterior seal ring contacts with the inwall of cylinder barrel.
Described righting spring leaf comprises two circle bodies, is at least provided with two spring leafs between two circle bodies, and the junction of described spring leaf and circle body is the Along ent of this circle body; Described two circle bodies are sheathed on body, and during installation, spring leaf is positioned at the bar hole position on cylinder barrel, and the number of bar hole is identical with the number of spring leaf.
Described spring leaf is six, and the junction of adjacent two every ends of spring leaf and circle body is positioned at six position of halving places of this circle body sidewall, and the bar hole of being located on cylinder barrel is six.
Described retaining box is made of one piece by a box circle body and three connection straps, and described three connection straps are located at respectively the trisection posistion place of box circle body sidewall; In described connection strap, be provided with U-shaped breach, on the inner side edge of U-shaped breach, be equipped with toothed segment.
Retaining pin thread is made of one piece by a pin thread circle body and three pin thread connection straps, described three pin thread connection straps are located at respectively the trisection posistion place of pin thread circle body sidewall, are provided with the toothed segment that on the U-shaped breach with retaining box, toothed segment matches on the dual-side of every pin thread connection strap.
Described retaining pin thread is realized separable connection with retaining box by pin thread connection strap and connection strap.
Described baffle ring and this body by integral forming, and the external diameter of baffle ring is identical with the external diameter of cylinder barrel.
Described hydraulic pressure hole is three, and three's aperture distribution is on the outer wall of body, and the third-class office on the same circumference that is centered close to body of each opening.
The utility model is compared and is had the following advantages and beneficial effect compared with prior art:
(1), sleeve pipe and box cupling fix, entire length is constant, relies on the pressure of suppressing that spring leaf is strutted, it is large that diameter becomes, thereby make sleeve pipe placed in the middle in the horizontal direction; Can effectively improve drilling fluid, improve cementing quality, especially for horizontal cementing successful; (2), the realization of adjustable springs sheet length and the borehole wall fits tightly; (3), many cover sealing rings are installed between body and cylinder barrel, reliability is high; Between body and cylinder barrel, be provided with by retaining pin thread, retaining box, righting spring leaf and form one-way locking structure, effectively prevent from becoming flexible.
Accompanying drawing explanation
Fig. 1 is the partial sectional view of front view of the present utility model.
Partial sectional view when Fig. 2 is the compressed distortion of spring leaf of the present utility model.
Fig. 3 is the A-A view of Fig. 2.
Fig. 4 is the sectional view that body of the present utility model arranges place, hydraulic pressure hole.
Fig. 5 is cylinder body sectional view of the present utility model.
Fig. 6 is retaining box partial sectional view of the present utility model.
Fig. 7 is retaining box left view of the present utility model.
Fig. 8 is retaining pin thread partial sectional view of the present utility model.
Fig. 9 is retaining pin thread left view of the present utility model.
The specific embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
A shale gas Horizontal well casing centering device as Figure 1-3, comprising: body 1, be located at the box cupling 2 of body one end; Be sheathed on the cylinder barrel 3 on body, be movably set in piston 4, retaining box 5, retaining pin thread 6, righting spring leaf 7 on body 1; One end is located in piston 4, the other end is located at the shear pin 11 in body 1; Wherein:
As shown in Figure 4, described body 1 hollow, its both ends are equipped with external screw thread, and box cupling 2 is a cylindrical shell, and the link of itself and body is provided with internal thread, between the two, is threaded connection, and the outer wall of described body 1 is provided with baffle ring 101; In the link of body 1 and box cupling 2, be provided with three hydraulic pressure holes 102, three's aperture distribution is on the outer wall of body 1, and the third-class office on the same circumference that is centered close to body of each opening.
As shown in Fig. 2, Fig. 5, described cylinder barrel 3 is a cylinder, it is sheathed on body 1, cylinder barrel 3 one end contact with box cupling 2, cylinder barrel 3 is provided with inner baffle ring 301 integrated with it on the inwall of this end, inner baffle ring 301 contacts with body outer wall, and the other end of cylinder barrel 3 contacts with a sidewall of baffle ring 101; The bar hole 302 of being located on cylinder barrel 3 is six.
As shown in Figure 2, interior two inner seal rings 9 that are all embedded with of described inner baffle ring 301 and piston 4, described inner seal ring 9 all contacts with the outer wall of body 1; In described piston outer wall, be also embedded with two exterior seal rings 10, the outer wall of described exterior seal ring 10 contacts with the inwall of cylinder barrel.
Cylinder barrel external diameter, baffle ring external diameter, box cupling external diameter are identical, and baffle ring and body are made of one piece.
As shown in Fig. 6-7, described retaining box 5 is made of one piece by a box circle body 501 and three connection straps 502, and described three connection straps 502 are located at respectively the trisection posistion place of box circle body sidewall; In described connection strap, be provided with U-shaped breach 503, on the inner side edge of U-shaped breach, be equipped with toothed segment 504.
As Figure 8-9, retaining pin thread 6 is made of one piece by a pin thread circle body 601 and three pin thread connection straps 602, described three pin thread connection straps 602 are located at respectively the trisection posistion place of pin thread circle body sidewall, on the dual-side of every pin thread connection strap, be provided with the toothed segment 603 that on the U-shaped breach with retaining box, toothed segment 504 matches, pin thread connection strap 602 combines with the U-shaped breach 503 of box, one-way locking when toothed segment combines for the two.
As shown in Figure 2, in the present embodiment, described righting spring leaf 7 comprises two circle bodies 701, is provided with six roots of sensation spring leaf 702 between two circle bodies, and the sidewall junction of described spring leaf and circle body is six Along ents of this circle body; Described two circle bodies 701 are all sheathed on body, and during installation, spring leaf is positioned at the bar hole position on cylinder barrel, and the number of bar hole 302 is identical with the number of spring leaf 702.
Shear pin 11 is cylindric, and one end is located in piston 4, the other end is located in body 1.
Described piston 4, retaining box 5, retaining pin thread 6, righting spring leaf 7 are all movably set on body 1 and all between cylinder barrel 3 and body 1; In the present embodiment, box circle body 501 one end of retaining box contact with piston 4, and the other end contacts with a wherein circle body 701 of righting spring leaf 7; Obviously, embodiment as an alternative, also can be put in this position by retaining pin thread 6, and pin thread circle body 601 one end of retaining pin thread 6 contact with piston 4, and the other end contacts with a wherein circle body 701 of righting spring leaf 7; And connection strap 502 with on righting spring leaf one end contact; Another circle body 701 of righting spring leaf 7 contacts with the pin thread circle body 601 of retaining pin thread, and pin thread circle body 601 other ends of retaining pin thread contact with the sidewall contacting with cylinder barrel 3 on baffle ring 101; Described retaining pin thread 6 is realized separable be connected by pin thread connection strap 602 with connection strap 502 with retaining box 5.
In the space that the outlet of described hydraulic pressure hole 102 on body outer wall forms between inner baffle ring 301, cylinder barrel 3 and body 1, piston 4 four, hydraulic pressure hole 102 openings are between inner baffle ring 301 and piston 4.During work, by 102Xiang Gai space, hydraulic pressure hole, pressurize, piston 4 is subject on body 1, sliding after institute's plus-pressure, shear pin 11 is cut off, thereby the box circle body 501 that promotes to contact with it slides on body, and now connection strap 502 moves forward, a wherein circle body 701 of the righting spring leaf 7 contacting with box circle body 501 is pushed, now spring leaf 6 compressed and distortion, from being located at the bar hole 302 of corresponding position on cylinder barrel, stretch out, be now equivalent to increase the diameter of cylinder barrel; Connection strap 502 continues to relatively move with pin thread connection strap 602, until the toothed segment 503,603 on the two combines, stops moving and realizing monodirectional locking.
While carrying out well cementing operation, sleeve pipe 12 uses and is threaded with box cupling 2.
Claims (9)
1. a shale gas Horizontal well casing centering device, is characterized in that, comprising: body, be located at the box cupling of body one end; Be sheathed on the cylinder barrel on body, be movably set in piston, retaining box, retaining pin thread, righting spring leaf on body; One shear pin one end is located in piston, and the other end is located in body; Described piston, retaining box, retaining pin thread, righting spring leaf are between inner wall of cylinder and body outer wall, and cylinder barrel is provided with bar hole, during the extrusion of righting spring leaf, from described bar hole, stretch out; The outer wall of described body is provided with baffle ring, and one end of cylinder barrel contacts with one end of box cupling, and the other end contacts with a sidewall of baffle ring; Retaining box one end contacts with piston, and the other end contacts with one end of righting spring leaf; The other end of righting spring leaf contacts with retaining pin thread, and the other end of retaining pin thread contacts with the sidewall contacting with cylinder barrel on baffle ring; The inner wall of end that cylinder barrel contacts with box cupling is provided with inner baffle ring, and inner baffle ring contacts with body outer wall; In the end that body is connected with box cupling, be provided with hydraulic pressure hole, the outlet of described hydraulic pressure hole on body outer wall is positioned at the annular space that inner baffle ring, cylinder barrel, body and piston form.
2. a kind of shale gas Horizontal well casing centering device as claimed in claim 1, is characterized in that, is all embedded with two inner seal rings in described inner baffle ring and piston, and described inner seal ring all contacts with the outer wall of body; In described piston outer wall, be also embedded with two exterior seal rings, the outer wall of described exterior seal ring contacts with the inwall of cylinder barrel.
3. a kind of shale gas Horizontal well casing centering device as claimed in claim 1, is characterized in that, described righting spring leaf comprises two circle bodies, is at least provided with two spring leafs between two circle bodies, and the junction of described spring leaf and circle body is the Along ent of this circle body; Described two circle bodies are sheathed on body, and during installation, spring leaf is positioned at the bar hole position on cylinder barrel, and the number of bar hole is identical with the number of spring leaf.
4. a kind of shale gas Horizontal well casing centering device as claimed in claim 3, it is characterized in that, described spring leaf is six, and the junction of adjacent two every ends of spring leaf and circle body is positioned at six position of halving places of this circle body sidewall, and the bar hole of being located on cylinder barrel is six.
5. a kind of shale gas Horizontal well casing centering device as claimed in claim 1, is characterized in that, described retaining box is made of one piece by a box circle body and three connection straps, and described three connection straps are located at respectively the trisection posistion place of box circle body sidewall; In described connection strap, be provided with U-shaped breach, on the inner side edge of U-shaped breach, be equipped with toothed segment.
6. a kind of shale gas Horizontal well casing centering device as described in claim 1 or 5, it is characterized in that, retaining pin thread is made of one piece by a pin thread circle body and three pin thread connection straps, described three pin thread connection straps are located at respectively the trisection posistion place of pin thread circle body sidewall, are provided with the toothed segment that on the U-shaped breach with retaining box, toothed segment matches on the dual-side of every pin thread connection strap; Between retaining pin thread and retaining box, by pin thread connection strap and connection strap, realize separable connection.
7. a kind of shale gas Horizontal well casing centering device as shown in claim 6, is characterized in that, described retaining pin thread is realized separable connection with retaining box by pin thread connection strap and connection strap.
8. a kind of shale gas Horizontal well casing centering device as claimed in claim 1, is characterized in that, described baffle ring and this body by integral forming, and the external diameter of baffle ring is identical with the external diameter of cylinder barrel.
9. a kind of shale gas Horizontal well casing centering device as claimed in claim 1, is characterized in that, described hydraulic pressure hole is three, and three's aperture distribution is on the outer wall of body, and the third-class office on the same circumference that is centered close to body of each opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420107156.5U CN203835289U (en) | 2014-03-11 | 2014-03-11 | Shale gas horizontal well casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420107156.5U CN203835289U (en) | 2014-03-11 | 2014-03-11 | Shale gas horizontal well casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835289U true CN203835289U (en) | 2014-09-17 |
Family
ID=51513146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420107156.5U Expired - Fee Related CN203835289U (en) | 2014-03-11 | 2014-03-11 | Shale gas horizontal well casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2014
- 2014-03-11 CN CN201420107156.5U patent/CN203835289U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20160311 |