CN209838334U - Anti-fatigue elastic casing centralizer - Google Patents
Anti-fatigue elastic casing centralizer Download PDFInfo
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- CN209838334U CN209838334U CN201920550203.6U CN201920550203U CN209838334U CN 209838334 U CN209838334 U CN 209838334U CN 201920550203 U CN201920550203 U CN 201920550203U CN 209838334 U CN209838334 U CN 209838334U
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- end ring
- grooves
- centralizer
- stress
- working rib
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Abstract
The utility model discloses an anti-fatigue elastic casing centralizer, which comprises an upper end ring and a lower end ring with consistent diameters; a plurality of working rib plates are fixedly connected between the upper end ring and the lower end ring; the working rib plates are uniformly distributed around the circumference of the upper end ring or the lower end ring; the width of the working rib plate is 30-130 mm; also comprises a plurality of stress relief grooves. According to the practical use requirement, the stress relief groove is arranged on the working rib plates with different widths and at the joint of the rib plate and the end ring; the stress relief grooves provide stress deformation space for the body elastic material when the rib plates are subjected to extreme extrusion deformation, so that the damage or partial damage to the tissue structure of the body elastic material is avoided.
Description
Technical Field
The utility model belongs to the technical field of oil drilling and production cementing equipment, concretely relates to antifatigue elastic sleeve centralizer.
Background
The centering degree of the casing in the well hole is one of determinants of the good and bad cementing quality of the oil and gas well, and the placement of the centralizer is the basis of the centering or not of the casing. Centralizers are components used to centralize casing and ensure concentricity of the casing in the wellbore. The performance of centralizers of different types has different influences on the running-in and final centering degree of a casing, and the existing centralizer has the problems that a working rib plate is easy to permanently deform after being subjected to a large load, so that the resetting force of an elastic casing centralizer is insufficient, the centering degree of the casing in a well hole is insufficient during well cementation, the well cementation quality is reduced, and serious consequences such as well cementation failure and oil-gas series layers can be caused when the eccentricity is too large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an antifatigue elasticity sleeve pipe centralizer has solved the centralizer that exists among the prior art and has received the heavy load after, and its work gusset is easy permanent deformation, causes the centralizer restoring force insufficient, the problem of being in the well is moderate not enough.
The utility model adopts the technical proposal that the anti-fatigue elastic casing centralizer comprises an upper end ring and a lower end ring with consistent diameters; a plurality of working rib plates are fixedly connected between the upper end ring and the lower end ring; the working rib plates are uniformly distributed around the circumference of the upper end ring or the lower end ring; the width of the working rib plate is 30-130 mm; also comprises a plurality of stress relief grooves.
The utility model discloses a characteristics still lie in:
the stress relieving groove is arranged on the working rib plate.
The shape of the stress relieving groove is horizontal straight line shape, longitudinal straight line shape or circular arc shape.
The arc-shaped stress relief grooves positioned at the lower part of the working rib plate are arranged in a herringbone manner.
The radius range of the circular arc stress relief groove is R20-80 mm.
The distance between the stress removing groove and the edge of the working rib plate on the same side is 10-20 mm.
A plurality of destressing grooves are further formed in the joints of the working rib plates, the upper end ring and the lower end ring, and the arrangement of the destressing grooves in the upper part joint is symmetrical to the arrangement of the destressing grooves in the lower part joint.
The length of each stress relief groove is 20-100 mm; the width is 1-5 mm.
The utility model has the advantages that:
the utility model discloses an anti-fatigue elastic casing centralizer, according to the actual use demand, sets a destressing groove on the working rib plates with different widths and the joints of the rib plates and the end links; the positions, the shapes, the sizes and the number of the stress relief grooves are adjusted according to specific working condition requirements, and the stress relief grooves provide stress deformation spaces for the body elastic material when the rib plates are subjected to extreme extrusion deformation, so that the damage or partial damage to the body elastic material tissue structure is avoided; the attenuation of the reset force of the elastic centralizer after a large load is avoided, and the design performance of the elastic centralizer is kept.
Drawings
Fig. 1 is a schematic structural view of an anti-fatigue elastic casing centralizer a of the invention;
FIG. 2 is a schematic structural view of the fatigue-resistant elastic casing centralizer b of the present invention;
FIG. 3 is a schematic structural view of the anti-fatigue elastic casing centralizer c of the present invention
FIG. 4 is a schematic structural view of the anti-fatigue elastic casing centralizer d of the present invention
FIG. 5 is a schematic structural view of the anti-fatigue elastic casing centralizer e of the present invention
FIG. 6 is a schematic structural view of the anti-fatigue elastic casing centralizer f of the present invention
FIG. 7 is a schematic structural view of the fatigue-resistant elastic casing centralizer g of the present invention
FIG. 8 is a schematic structural view of the fatigue-resistant elastic casing centralizer h of the present invention
FIG. 9 is a schematic structural view of the anti-fatigue elastic casing centralizer i of the present invention
Fig. 10 is a schematic structural view of the fatigue-resistant elastic casing centralizer j of the present invention.
In the figure, 1 is an upper end ring, 2 is a lower end ring, 3 is a working rib plate, and 4 is a stress relief groove.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1, the fatigue-resistant elastic casing centralizer of the invention comprises an upper end ring 1 and a lower end ring 2 with consistent diameters; a plurality of working rib plates 3 are fixedly connected between the upper end ring 1 and the lower end ring 2; the working rib plates 3 are uniformly distributed around the circumference of the upper end ring 1 or the lower end ring 2; the width of the working rib plate 3 is 30-130 mm; and also comprises a plurality of stress relief grooves 4. The stress relieving groove 4 is arranged on the working rib plate 3. The shape of the stress relieving groove 4 is horizontal straight line shape, longitudinal straight line shape or circular arc shape. The arc-shaped stress relief grooves 4 positioned at the lower part of the working rib plate 3 are arranged in a herringbone shape. The radius range of the circular arc stress relief groove 4 is R20-80 mm. The distance between the stress removing groove 4 and the edge of the working rib plate 3 on the same side is 10-20 mm. The length of each stress relief groove 4 is 20-100 mm; the width is 1-5 mm.
Specifically, the stress relieving grooves 4 are formed in the upper part and the lower part of the working rib plate 3, and the arrangement of the stress relieving grooves 4 in the upper part and the arrangement of the stress relieving grooves 4 in the lower part are symmetrical; the shape of the stress relieving groove 4 is a transverse straight line shape; the stress relief grooves 4 positioned at the lower part of the working rib plate 3 are distributed in a plurality of rows, and each row is provided with one stress relief groove; the distance between two adjacent rows of stress-relief grooves 4 is consistent and is 10-40 mm.
Example 2
As shown in fig. 2, the present invention is substantially the same as in example 1, except that: the shape of the stress relieving groove 4 is a longitudinal straight line shape; the stress relief grooves 4 positioned at the lower part of the working rib plate 3 are distributed in a plurality of rows, the first row is one and is positioned on the longitudinal symmetry axis of the working rib plate 3; below the second row, two stress relief grooves 4 are arranged in each row, and the symmetrical axes of the two stress relief grooves are in the same line with the longitudinal symmetrical axis of the working rib plate 3; the longitudinal distance between every two adjacent rows of stress-relief grooves 4 is consistent and is 10-40 mm; and the transverse distance between the two stress relieving grooves 4 in each row is 20-100 mm below the second row.
Example 3
As shown in fig. 3, the present invention is substantially the same as in example 1, except that: specifically, a plurality of rows of stress relief grooves 4 are distributed at the lower part of the working rib plate 3, wherein the first row is a longitudinal linear stress relief groove 4 and is positioned on a longitudinal symmetrical axis of the working rib plate 3; below the second row, there are two in each row, and the two stress relief grooves 4 are distributed in a herringbone shape; the minimum longitudinal distance between every two adjacent rows of stress-relief grooves 4 is 10mm, and the maximum longitudinal distance is 40 mm; below the second row, the transverse distance between the two stress relief grooves 4 of each row is at least 5mm and at most 30 mm.
Example 4
As shown in fig. 4, the present invention is substantially the same as in example 1, except that: the stress relief grooves 4 positioned at the upper part of the working rib plate 3 are distributed in a plurality of rows, and the first row is a transverse linear stress relief groove 4; below the second row, there are two in each row, and the two stress relief grooves 4 are distributed in an inverted herringbone manner; the horizontal distance between the end part of the first row of stress-relief grooves 4 and the second row of stress grooves 4 on the same side is 5-20 mm; the longitudinal distance between the first row and the second row is 10mm at the minimum and 40mm at the maximum; and below the second row, the longitudinal distance between two adjacent rows of the stress-relief grooves 4 is or satisfies the formula of 10-40 mm, and the transverse distance between two stress-relief grooves 4 in each row is 5mm at minimum and 30mm at maximum.
Example 5
As shown in fig. 5, the present invention is substantially the same as example 4 except that: the middle part of the working rib plate 3 is also provided with a plurality of rows of longitudinal linear destressing grooves 4; the first row and the last row are one and are positioned on the longitudinal symmetry axis of the working rib plate 3; the other rows are provided with two destressing grooves 4, and the two destressing grooves are symmetrically distributed, and the symmetry axis is collinear with the longitudinal symmetry axis of the working rib plate 3; the longitudinal distance between every two adjacent rows of stress-relief grooves 4 is 10-40 mm; even rows, the transverse distance between two stress relief grooves 4 of each row satisfies the formula: l is1The width of the working rib plate is-2 x (5-25); odd rows, the transverse distance between two stress relief grooves 4 of each row satisfying the formula: l is2The width of the working rib plate is-2 x (5-15).
Example 6
As shown in fig. 6, the present invention is substantially the same as in example 1, except that: the joint of the working rib plate 3 and the upper end ring 1 and the lower end ring 2 is also provided with a plurality of destressing grooves 4, and the arrangement of the destressing grooves 4 at the upper part joint is symmetrical to that of the destressing grooves 4 at the lower part joint; the stress removing grooves 4 at the lower connecting part are arranged in a shape of Chinese character 'pin'; the stress removing grooves 4 are arranged in a delta shape, and the shape of each stress removing groove 4 is transversely linear.
Example 7
As shown in fig. 7, the present invention is substantially the same as example 2 except that: the joint of the working rib plate 3 and the upper end ring 1 and the lower end ring 2 is also provided with a plurality of destressing grooves 4, and the arrangement of the destressing grooves 4 at the upper part joint is symmetrical to that of the destressing grooves 4 at the lower part joint; the stress relieving grooves 4 at the lower connection part are two longitudinal linear stress relieving grooves 4, and the transverse distance between the two stress relieving grooves 4 is 20-100 mm.
Example 8
As shown in fig. 8, the present invention is substantially the same as example 3 except that: the joint of the working rib plate 3 and the upper end ring 1 and the lower end ring 2 is also provided with a plurality of destressing grooves 4, and the arrangement of the destressing grooves 4 at the upper part joint is symmetrical to that of the destressing grooves 4 at the lower part joint; the stress removing grooves 4 at the lower connecting part are arranged in a shape of Chinese character 'pin'; the stress relieving grooves 4 are distributed in a shape of a Chinese character 'pin', and the shape of each stress relieving groove 4 is circular arc. The radius range of the circular arc stress relief groove 4 is R20-80 mm. The transverse distance between two distressing grooves 4 in even number rows is 20-80 mm.
Example 9
As shown in fig. 9, the present invention is substantially the same as example 4 except that: no transverse linear stress relief groove 4; the joint of the working rib plate 3 and the upper end ring 1 and the lower end ring 2 is also provided with a plurality of destressing grooves 4, and the arrangement of the destressing grooves 4 at the upper part joint is symmetrical to that of the destressing grooves 4 at the lower part joint; the stress removing grooves 4 at the lower connecting part are arranged in a shape of Chinese character 'pin'; the stress relieving grooves 4 are distributed in a shape of a Chinese character 'pin', and the shape of each stress relieving groove 4 is circular arc. The radius range of the circular arc stress relief groove 4 is R20-80 mm. The transverse distance between two distressing grooves 4 in even number rows is 20-80 mm.
Example 10
As shown in fig. 10, the present invention is substantially the same as example 5 except that: no transverse linear stress relief groove 4; the joint of the working rib plate 3 and the upper end ring 1 and the lower end ring 2 is also provided with a plurality of destressing grooves 4, and the arrangement of the destressing grooves 4 at the upper part joint is symmetrical to that of the destressing grooves 4 at the lower part joint; the stress removing grooves 4 at the lower connecting part are arranged in a shape of Chinese character 'pin'; the stress relieving grooves 4 are distributed in a shape of a Chinese character 'pin', and the shape of each stress relieving groove 4 is circular arc. The radius range of the circular arc stress relief groove 4 is R20-80 mm. The transverse distance between two distressing grooves 4 in even number rows is 20-80 mm.
And (3) comparing test data:
according to the comparison of the test data, the size of the outer diameter of the rib plate of the product with the destressing groove is reduced little, and the flexure resistance is obviously better than that of the product without the destressing groove.
The utility model discloses an anti-fatigue elastic casing centralizer, according to the actual use demand, sets a destressing groove on the working rib plates with different widths and the joints of the rib plates and the end links; the positions, the shapes, the sizes and the number of the stress relief grooves are adjusted according to specific working condition requirements, and the stress relief grooves provide stress deformation spaces for the body elastic material when the rib plates are subjected to extreme extrusion deformation, so that the damage or partial damage to the body elastic material tissue structure is avoided; the attenuation of the reset force of the elastic centralizer after a large load is avoided, and the design performance of the elastic centralizer is kept.
Claims (8)
1. An anti-fatigue elastic casing centralizer is characterized in that: comprises an upper end ring (1) and a lower end ring (2) with consistent diameters; a plurality of working rib plates (3) are fixedly connected between the upper end ring (1) and the lower end ring (2); the working rib plates (3) are uniformly distributed around the circumference of the upper end ring (1) or the lower end ring (2); the width of the working rib plate (3) is 30-130 mm; also comprises a plurality of stress relief grooves (4).
2. The fatigue resistant elastomeric bushing centralizer of claim 1, wherein: the stress relieving groove (4) is arranged on the working rib plate (3).
3. The fatigue resistant elastomeric bushing centralizer of claim 2, wherein: the shape of the stress relieving groove (4) is a transverse straight line shape, a longitudinal straight line shape or an arc shape.
4. The fatigue resistant elastomeric bushing centralizer of claim 3, wherein: the arc-shaped stress relief grooves (4) positioned at the lower part of the working rib plate (3) are arranged in a herringbone shape.
5. The fatigue resistant elastomeric bushing centralizer of claim 4, wherein: the radius range of the circular arc-shaped stress relief groove (4) is R20-80 mm.
6. The fatigue resistant elastomeric bushing centralizer of claim 5, wherein: the distance between the stress relieving groove (4) and the edge of the working rib plate (3) on the same side is 10-20 mm.
7. The fatigue resistant elastomeric bushing centralizer of claim 6, wherein: a plurality of destressing grooves (4) are further formed in the joints of the working rib plate (3) and the upper end ring (1) and the lower end ring (2), and the arrangement of the destressing grooves (4) in the upper part joint is symmetrical to the arrangement of the destressing grooves (4) in the lower part joint.
8. The fatigue resistant elastomeric bushing centralizer of claim 7, wherein: the length of the single stress relief groove (4) is 20-100 mm; the width is 1-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920550203.6U CN209838334U (en) | 2019-04-22 | 2019-04-22 | Anti-fatigue elastic casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920550203.6U CN209838334U (en) | 2019-04-22 | 2019-04-22 | Anti-fatigue elastic casing centralizer |
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| Publication Number | Publication Date |
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| CN209838334U true CN209838334U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920550203.6U Active CN209838334U (en) | 2019-04-22 | 2019-04-22 | Anti-fatigue elastic casing centralizer |
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| CN (1) | CN209838334U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043199A (en) * | 2019-04-22 | 2019-07-23 | 陕西纽兰德实业有限公司 | A kind of centralizer |
| CN113588249A (en) * | 2021-09-02 | 2021-11-02 | 中海油田服务股份有限公司 | Eccentric ware and centralizer class instrument fatigue test equipment |
-
2019
- 2019-04-22 CN CN201920550203.6U patent/CN209838334U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043199A (en) * | 2019-04-22 | 2019-07-23 | 陕西纽兰德实业有限公司 | A kind of centralizer |
| CN113588249A (en) * | 2021-09-02 | 2021-11-02 | 中海油田服务股份有限公司 | Eccentric ware and centralizer class instrument fatigue test equipment |
| CN113588249B (en) * | 2021-09-02 | 2024-03-08 | 中海油田服务股份有限公司 | Fatigue test equipment for eccentric and centralizer instruments |
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