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External pressure collapse device

A technology of extruding blocks and outer frames, applied in measuring devices, using stable tension/pressure to test material strength, instruments, etc., can solve the problem that blocking perforation affects experimental accuracy, ultra-high pressure fluid risks, and affects test accuracy. and other problems to achieve the effect of ensuring test accuracy, uniform pressure, and safe and reliable test

Pending Publication Date: 2020-05-12
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The oil layer casing perforation anti-collapse simulation test machine disclosed in this patent document also has the problems of ultra-high pressure fluid risk, extremely difficult sealing, and plugging perforation affecting the accuracy of the experiment, which affects the accuracy of the test.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] see figure 1 with figure 2 , an external pressure crushing device, including a base 1 for fixing the oil casing, and also includes an extruding block 2 and a driving member 3, the extruding block 2 is three, and the inner surface of the extruding block 2 is On the arc surface, the extruding blocks 2 are slidably arranged on the base 1 , and the extruding blocks 2 are arranged at intervals along the circumferential direction of the oil casing, and the extruding blocks 2 make linear reciprocating motions under the action of the driving member 3 .

[0032] This embodiment is the most basic implementation. There are three extruding blocks 2. The inner surface of the extruding block 2 is a circular arc surface. The extruding block 2 is slidably arranged on the base 1. Arranged at intervals in the circumferential direction, the extruding block 2 makes a linear reciprocating motion under the action of the driving member 3. Compared with the prior art that uses fluid pressure...

Embodiment 2

[0034] see figure 1 with figure 2 , an external pressure crushing device, including a base 1 for fixing the oil casing, and also includes an extrusion block 2 and a driving member 3, the number of the extrusion blocks 2 is four, and the inner surface of the extrusion block 2 is On the arc surface, the extruding blocks 2 are slidably arranged on the base 1 , and the extruding blocks 2 are arranged at intervals along the circumferential direction of the oil casing, and the extruding blocks 2 make linear reciprocating motions under the action of the driving member 3 .

[0035] The four extruding blocks 2 are arranged opposite to each other, and the extension lines of the moving tracks of the two oppositely arranged extruding blocks 2 coincide.

[0036]This embodiment is a preferred implementation mode. There are four extruding blocks 2, and the four extruding blocks 2 are arranged oppositely in pairs. The inner surface of the block 2 is set as a circular arc surface so as to a...

Embodiment 3

[0038] see figure 1 with figure 2 , an external pressure crushing device, including a base 1 for fixing the oil casing, and also includes an extrusion block 2 and a driving member 3, the number of the extrusion blocks 2 is four, and the inner surface of the extrusion block 2 is On the arc surface, the extruding blocks 2 are slidably arranged on the base 1 , and the extruding blocks 2 are arranged at intervals along the circumferential direction of the oil casing, and the extruding blocks 2 make linear reciprocating motions under the action of the driving member 3 .

[0039] The four extruding blocks 2 are arranged opposite to each other, and the extension lines of the moving tracks of the two oppositely arranged extruding blocks 2 coincide.

[0040] The distance between two adjacent extruded blocks 2 is greater than 0.05 times the inner surface diameter of the extruded blocks 2 and less than 0.2 times the inner surface diameter of the extruded blocks 2 .

[0041] This embod...

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Abstract

The invention discloses an external pressure collapse device. The invention belongs to the technical field of oil-gas drilling experimental equipment. The device comprises a base used for fixing an oil casing pipe. The device is characterized in that the device also comprises at least three extrusion blocks and a driving piece, inner side surfaces of the extrusion blocks are arc surfaces; the extrusion blocks are arranged on a base in a sliding mode, the extrusion blocks are arranged at intervals in the circumferential direction of the oil casing pipe, the extrusion blocks do linear reciprocating motion under the action of the driving piece, the bottoms of the extrusion blocks are connected with rolling wheels, rolling grooves for the rolling wheels to roll are formed in the base, and theextrusion blocks are arranged on the base through the rolling wheels. Fluid pressure is replaced by mechanical acting force, the whole test is safe and reliable, a sealed environment is not needed, the test accuracy can be guaranteed, and the test precision is improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling experiment equipment, in particular to an external pressure crushing device. Background technique [0002] At present, oil and gas wells use oil layer casing in cementing and completion, and set perforations on the oil layer casing. Through the perforation of the oil layer casing, the oil and gas in the formation oil reservoir can pass through the oil layer casing and flow into the casing, and then recover out of the ground. However, after explosive perforation is carried out on the oil layer casing, the oil layer casing is set in the deep bottom layer, and the outside is rock formations. The anti-extrusion ability of the pipe will decrease, and in the fracturing and oil testing operations, due to insufficient consideration of the anti-collapse ability of the casing after perforation, the casing diameter shrinkage deformation often occurs in the perforation section of the oil layer, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0003G01N2203/0019G01N2203/0048G01N2203/0075G01N2203/0274G01N2203/0682
Inventor 胡刚袁灿明马伟勋郑云川王国荣尹丛彬董润何乐廖代胜龚蔚刘文全
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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