CN212774172U - Elastic centralizer for well drilling exploitation - Google Patents
Elastic centralizer for well drilling exploitation Download PDFInfo
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- CN212774172U CN212774172U CN201920735450.3U CN201920735450U CN212774172U CN 212774172 U CN212774172 U CN 212774172U CN 201920735450 U CN201920735450 U CN 201920735450U CN 212774172 U CN212774172 U CN 212774172U
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- elastic sheet
- end ring
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- additional elastic
- elastic
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Abstract
The invention discloses an elastic centralizer for well drilling exploitation, which is simple in structure and reliable in performance and aims to solve the problems of the conventional elastic centralizer. The elastic sheet group is mainly composed of an upper end ring, a lower end ring and an elastic sheet group. The elastic sheet group is formed by welding and overlapping a plurality of elastic sheets with different lengths and is divided into a main elastic sheet, an outer additional elastic sheet and an inner additional elastic sheet, wherein the main elastic sheet is fixed on the upper end ring and the lower end ring. And the inner additional elastic sheet is made into a trapezoidal convex structure, so that the recovery elasticity of the elastic sheet is increased. The shell fragment group can guarantee powerful holding power, can have nimble resilience of replying again to can lift off the wall of a well down with the casing string, keep good centering degree, overcome the not enough scheduling problem of holding power that conventional elasticity centralizer can appear.
Description
Technical Field
The utility model belongs to the technical field of oil drilling and relates to a centralizer, especially an elasticity centralizer for drilling exploitation.
Background
In the development of oil-gas resource exploration and development technology in China, in wells with complex structures such as long horizontal-section horizontal wells and the like, a casing string is easy to be seriously eccentric with a borehole, so that the problems of low drilling fluid displacement efficiency, poor well cementation quality and the like are caused. Aiming at the improvement of the centering degree of a casing string, casing centralizers are mainly adopted at home and abroad. The existing elastic centralizer is easy to deform, and the centering degree of the improved casing string is not ideal. The elastic sheet in the existing elastic centralizer is mostly of a single-sheet structure, and in order to improve the elastic force, although the original single arch shape is improved into a double arch shape or a spiral arch shape, the improvement effect of the improved design on the centering degree of the casing is not obvious.
Chinese patent CN109505534A discloses a novel elasticity centralizer, including motor housing body and motor inner shell, the cylinder tubular structure of motor housing body and motor inner shell for cup jointing each other, be provided with electric motor rotor between motor housing body and the motor inner shell, battery and circuit board in the pit, electric motor rotor passes through the coupling cover with motor inner shell and is connected, electric motor rotor passes through threaded connection with the coupling cover, the coupling cover passes through the screw lead screw mode with motor inner shell and is connected, motor housing body upper end is connected with the body of righting, motor inner shell has the propulsion piece through threaded connection, it has the piece of righting to right swing joint on the body. Novel elasticity centralizer can meet the flexible volume of the condition automatically regulated that hinders according to centralizer department in the pit, ensures that the centralizer is avoiding meeting under the prerequisite of hindering, and maximum realization sleeve pipe righting function.
However, the technical scheme disclosed by the invention is complex and high in cost, and particularly relates to a motor rotor, an underground battery and an underground circuit board, so that a plurality of potential safety hazards exist under the severe underground environment condition, and the motor rotor, the underground battery and the underground circuit board are difficult to popularize and use in a well with a complex structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem that prior art exists, provide one kind and can follow the sleeve pipe and go into in the well smoothly, have sufficient elastic force again, can lift the casing string from the wall of going into the well, improve the centering degree of casing string in the well to simple structure, the reliable performance elasticity centralizer has important economy and social value to improving the well cementation quality, reducing development cost.
The utility model discloses a realize through following technical scheme:
the utility model provides an elasticity centralizer for well drilling exploitation, mainly comprises upper end ring, lower end ring, shell fragment group, its characterized in that: the elastic sheet group is formed by welding and splicing a plurality of elastic sheets with different lengths and is divided into a main elastic sheet, an outer additional elastic sheet and an inner additional elastic sheet, and the main elastic sheet is fixed on the upper end ring and the lower end ring; the main elastic sheet, the outer additional elastic sheet and the inner additional elastic sheet of the elastic sheet set have approximately the same arc angle.
The main elastic sheet, the outer additional elastic sheet and the inner additional elastic sheet are uniformly distributed along the circumferential direction of the end ring, and the number of the main elastic sheet, the outer additional elastic sheet and the inner additional elastic sheet is not less than four groups.
The number of the main elastic sheets, the outer additional elastic sheets and the inner additional elastic sheets is 6.
The side, facing the pipe column, of the inner additional elastic sheet adopts an uneven structure.
The side, facing the pipe column, of the inner additional elastic sheet is made into a trapezoidal convex structure.
Compared with the prior art, the utility model discloses a shell fragment group can guarantee powerful holding power, can have nimble reply elasticity again to can lift the casing string from the wall of a well down, keep good centering degree, overcome the not enough scheduling problem of holding power that conventional elasticity centralizer can appear.
Drawings
Fig. 1 is a schematic view of the elastic centralizer for drilling and mining of the present invention.
Fig. 2 is a top view of fig. 1.
The labels in the figure are: 1-upper end ring, 2-main elastic sheet, 3-outer additional elastic sheet, 4-inner additional elastic sheet and 5-lower end ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
An elastic centralizer for well drilling exploitation mainly comprises an upper end ring 1, a lower end ring 5 and a spring plate group, wherein the spring plate group is formed by welding and splicing a plurality of spring plates with different lengths and is divided into a main spring plate 2, an outer additional spring plate 3 and an inner additional spring plate 4, and the main spring plate 2 is fixed on the upper end ring 1 and the lower end ring 5; the main elastic sheet 2, the outer additional elastic sheet 3 and the inner additional elastic sheet 4 of the elastic sheet group have approximately the same arc angle.
The main elastic sheet 2, the outer additional elastic sheet 3 and the inner additional elastic sheet 4 are uniformly distributed along the circumferential direction of the end ring, and the number of the main elastic sheet, the outer additional elastic sheet and the inner additional elastic sheet is not less than four groups.
The inner additional elastic sheet 4 adopts an uneven structure facing the pipe column side.
The inner additional elastic sheet 4 is made into a trapezoidal convex structure facing the pipe column side.
Example 2
The elastic centralizer mainly comprises an upper end ring 1, a lower end ring 5 and a spring plate group. The elastic sheet group is formed by welding and overlapping a plurality of elastic sheets with different lengths and is divided into a main elastic sheet 2, an outer additional elastic sheet 3 and an inner additional elastic sheet 4, and the main elastic sheet 2 is fixed on the upper end ring and the lower end ring. And the inner additional elastic sheet 4 is made into a trapezoidal convex structure, so that the recovery elasticity of the elastic sheet is increased. The elastic sheet groups are uniformly distributed along the circumferential direction of the upper end ring and the lower end ring, and the number of the elastic sheet groups is 6 in order to meet the strength requirement. The main elastic sheet 2, the outer additional elastic sheet 3 and the inner additional elastic sheet 4 have approximately the same arc angle and are fixed by welding. The elastic centralizer is installed outside the casing, namely the casing passes through the upper end ring and the lower end ring, and the elastic centralizer is put into the well along with the casing string, and because the elastic sheet group is still of an arch structure and the surface of the additional elastic sheet is smooth, the frictional resistance between the casing string and the well wall when the casing string is put into the well can not be increased, and the casing string can be conveniently and smoothly put into the well. The shell fragment group can guarantee powerful holding power, can have nimble resilience of replying again to can lift off the wall of a well down with the casing string, keep good centering degree, overcome the not enough scheduling problem of holding power that conventional elasticity centralizer can appear.
Example 3
Referring to the attached figure 1, the elastic centralizer for well drilling exploitation mainly comprises an upper end ring 1, a lower end ring 5 and a spring plate group. The elastic sheet group is formed by welding and overlapping a plurality of elastic sheets with different lengths and is divided into a main elastic sheet 2, an outer additional elastic sheet 3 and an inner additional elastic sheet 4, and the main elastic sheet 2 is fixed between an upper end ring 1 and a lower end ring 5. The inner additional elastic sheet 4 is made into a trapezoidal convex structure, so that the recovery elasticity of the elastic sheet is increased.
Referring to fig. 2, the elastic sheet sets are uniformly distributed along the circumferential direction of the upper end ring 1 and the lower end ring 5, and the number of the elastic sheet sets is 6. The main elastic sheet 2, the outer additional elastic sheet 3 and the inner additional elastic sheet 4 of the elastic sheet group are 3 pieces in total and have approximately the same arc angle.
The utility model discloses an elasticity centralizer is installed in the sleeve pipe outside, and the sleeve pipe passes upper end ring 1 and lower end ring 5, the utility model discloses an elasticity centralizer is along with going into the well under the casing string, because play piece group still is bow-shaped structure, and the outer bullet piece surface that attaches is smooth, consequently can not increase when the casing string goes down and the frictional resistance between the wall of a well, be convenient for the casing string go into the well smoothly. The elastic sheet set can not only ensure strong supporting force, but also have flexible return elasticity.
Claims (5)
1. The utility model provides an elasticity centralizer for well drilling exploitation, by upper end ring (1), lower extreme ring (5), shell fragment group constitute, its characterized in that: the elastic sheet group is formed by welding and splicing a plurality of elastic sheets with different lengths and is divided into a main elastic sheet (2), an external additional elastic sheet (3) and an internal additional elastic sheet (4), and the main elastic sheet (2) is fixed on the upper end ring (1) and the lower end ring (5); the main elastic sheet (2), the outer additional elastic sheet (3) and the inner additional elastic sheet (4) of the elastic sheet group have approximately the same arc angle.
2. An elastic centralizer for wellbore production according to claim 1, wherein: the main elastic sheet (2), the outer additional elastic sheet (3) and the inner additional elastic sheet (4) are uniformly distributed along the circumferential direction of the end ring, and the number of the main elastic sheet, the outer additional elastic sheet and the inner additional elastic sheet is not less than four.
3. An elastic centralizer for wellbore production according to claim 2, wherein: the number of the main elastic sheets (2), the outer additional elastic sheets (3) and the inner additional elastic sheets (4) is 6.
4. A resilient centralizer for use in wellbore production according to claim 3, wherein: the inner additional elastic sheet (4) adopts an uneven structure facing the pipe column side.
5. An elastic centralizer for wellbore production according to claim 1 or 2, 3, wherein: the inner additional elastic sheet (4) faces the pipe column side and is made into a trapezoidal convex structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920735450.3U CN212774172U (en) | 2019-05-22 | 2019-05-22 | Elastic centralizer for well drilling exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920735450.3U CN212774172U (en) | 2019-05-22 | 2019-05-22 | Elastic centralizer for well drilling exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212774172U true CN212774172U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920735450.3U Active CN212774172U (en) | 2019-05-22 | 2019-05-22 | Elastic centralizer for well drilling exploitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212774172U (en) |
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2019
- 2019-05-22 CN CN201920735450.3U patent/CN212774172U/en active Active
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