CN209745708U - Simulation test device for non-uniform external extrusion of sleeve - Google Patents
Simulation test device for non-uniform external extrusion of sleeve Download PDFInfo
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- CN209745708U CN209745708U CN201822244791.9U CN201822244791U CN209745708U CN 209745708 U CN209745708 U CN 209745708U CN 201822244791 U CN201822244791 U CN 201822244791U CN 209745708 U CN209745708 U CN 209745708U
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Abstract
the utility model discloses a simulation test device for non-uniform external extrusion of a sleeve, which comprises a test sleeve, a non-uniform clamp and a radial load system; the non-uniform clamp is arranged on the test sleeve and comprises an upper non-uniform clamp and a lower non-uniform clamp, and the upper non-uniform clamp and the lower non-uniform clamp are respectively clamped at the upper end and the lower end of the test sleeve; the upper end surface of the upper non-uniform clamp is a plane, and the lower end surface of the upper non-uniform clamp is matched with the test sleeve; the lower end surface of the lower non-uniform clamp is a plane, and the upper end surface of the lower non-uniform clamp is matched with the test sleeve; the upper non-uniform clamp and the lower non-uniform clamp are arranged at intervals; the radial load system is used for applying uniform load to the non-uniform clamp; the utility model discloses adopt radial load system to realize with the help of inhomogeneous anchor clamps that the outer crowded load of casing string is inhomogeneous to be applyed, filled the blank of experimental simulation method.
Description
Technical Field
The utility model belongs to the technical field of the sleeve pipe external pressure loading test, concretely relates to crowded analogue test device outside the sleeve pipe is inhomogeneous.
Background
The shale bedding crack develops, the stratum heterogeneity is strong, the shale gas horizontal well fracturing process adopts casing fracturing, the casing complex fracturing process causes the casing service load environment to be complex and changeable, the remarkable characteristics are shown as follows: high parameters of the fracturing process, non-uniformity of external extrusion load, shearing property, bending property and sharp temperature change.
At present, a composite loading object evaluation device for a sleeve under the working conditions of non-uniform external extrusion, temperature load, internal pressure load, axial load and bending load is not reported; in the prior art, the casing string object simulation test device can realize the study of the uniform external extrusion load, the temperature load and the bending load combined loading, but cannot realize the loading of the casing string external extrusion load nonuniformity.
SUMMERY OF THE UTILITY MODEL
To not enough among the above-mentioned prior art, the utility model provides a shale gas well casing string inhomogeneous extrudes analogue test device outward to realize the inhomogeneous loading of casing string outer crowded load.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
A simulation test device for non-uniform external extrusion of a sleeve comprises a test sleeve, a non-uniform clamp, a radial load system and a sleeve pattern sample loading and fixing device; the sleeve type sample loading and fixing device is connected with one end of the test sleeve, and the test sleeve is arranged on the test frame through the sleeve type sample loading and fixing device; the non-uniform clamp is arranged on the test sleeve and comprises an upper non-uniform clamp and a lower non-uniform clamp, the upper non-uniform clamp is clamped at the upper end of the test sleeve, and the lower non-uniform clamp is clamped at the lower end of the test sleeve; the upper end surface of the upper non-uniform clamp is a plane, and the lower end surface of the upper non-uniform clamp is matched with the test sleeve; the lower end surface of the lower non-uniform clamp is a plane, and the upper end surface of the lower non-uniform clamp is matched with the test sleeve; the upper non-uniform clamp and the lower non-uniform clamp are arranged at intervals; the radial load system is used for applying uniform load to the upper non-uniform clamp and the lower non-uniform clamp.
Further, still include the lead gasket, the lead gasket sets up between inhomogeneous anchor clamps and test sleeve pipe.
Further, the axial load system is connected with the other end of the test sleeve and used for providing axial tensile or compressive load for the test sleeve.
Further, the test device also comprises a bending load system, wherein the bending load system is arranged on the non-uniform clamp and used for providing bending load for the test sleeve.
Further, the device comprises an internal pressure oil source system, wherein the internal pressure oil source system is arranged on the test sleeve and used for providing internal pressure of the test sleeve, and mechanical plugging devices are respectively arranged at the two ends of the test sleeve.
The device further comprises a temperature box, wherein the temperature box is arranged on the outer side of the test sleeve and is used for providing temperature load for the test sleeve; the temperature box comprises a first temperature box and a second temperature box, and the first temperature box and the second temperature box are respectively and symmetrically arranged on two sides of the non-uniform clamp.
further, the device also comprises a monitoring system, wherein the monitoring system comprises a strain gauge and a data acquisition and analysis system; the strain gauge is arranged at one end of a contact surface of the non-uniform clamp and the test sleeve and is connected with the data acquisition and analysis system; the data acquisition and analysis system is used for acquiring monitoring information of the monitoring point of the sleeve strain gauge in real time through the strain gauge.
Further, the length of the test cannula was 6 m.
Further, the rated pressure of the internal pressure oil source system is 200 MPa.
Further, the temperature box has a maximum temperature of 1000 ℃.
compared with the prior art, the utility model discloses the beneficial effect who has does:
The utility model relates to a simulation test device for the non-uniform external extrusion of casing pipes, which realizes the non-uniform application of the external extrusion load of a casing pipe column by means of a non-uniform clamp and a mechanical loading mode, and fills the blank of a test simulation method;
Furthermore, a lead gasket is added between the non-uniform fixture and the casing string, so that the influence of local stress concentration on the deformation of the casing string can be avoided;
furthermore, the bearing capacity of the casing string under different non-uniform external extrusion load working conditions of the casing string is quantified by simulating the deformation failure process of the casing string under the non-uniform external extrusion load working conditions and by arranging a strain gauge and a data acquisition system.
Furthermore, the deformation simulation of the casing string under the composite loading working conditions of bending load, internal pressure load, temperature load and non-uniform external extrusion can be realized, the field working conditions can be better approached, and the service environment of the complex fracturing casing string of the shale gas well can be more truly simulated.
The utility model relates to a shale gas well casing string inhomogeneous is crowded analogue test device outward can simulate shale gas well complicated fracturing process casing string and bear inhomogeneous crowded load operating mode service state outward, has filled the blank that current casing string can't carry out inhomogeneous crowded test simulation outward, can be used to shale gas well complicated fracturing casing string design and chooseing for use the research.
Drawings
Fig. 1 is a schematic view of the overall structure of a shale gas well casing string non-uniform external extrusion simulation test device according to the present invention;
FIG. 2 is a schematic view of a non-uniform clamp shape in accordance with the present invention;
fig. 3 is a schematic view of the installation position of the strain gauge in the present invention;
In the figure: the method comprises the following steps of 1, testing a sleeve, 2, a non-uniform clamp, 3, an internal pressure oil source system, 4, a sleeve sample loading and fixing device, 5, a lead gasket, 6, an axial load system, 7, a bending load system, 8, a temperature box and 9, wherein the sleeve sample loading and fixing device is arranged on a base; the system comprises an upper non-uniform clamp 21, a lower non-uniform clamp 22, a 81 first temperature box, a 82 second temperature box, a 91 strain gauge, a 911 first strain gauge, a 912 second strain gauge, a 913 third strain gauge, a 914 fourth strain gauge and a 92 data acquisition and analysis system.
Detailed Description
The following description will explain embodiments of the present invention in detail with reference to the drawings and specific examples.
Referring to the attached drawings 1-3, the utility model discloses a shale gas well non-uniform external extrusion simulation test device, which comprises a test casing 1, a non-uniform clamp 2, a radial load system, a casing style sample loading and fixing device 4, a lead cushion block 5, an axial load system 6, a bending load system 7, a temperature box 8, a monitoring system 9 and an internal pressure oil source system 3;
the sleeve type sample loading and fixing device 4 is connected with one end of the test sleeve 1, and the test sleeve 1 is arranged on the test frame through the sleeve type sample loading and fixing device 4; the axial load system 6 is connected with the other end of the test sleeve 1, and the axial load system 6 is used for providing axial tensile or compressive load for the test sleeve 1;
The non-uniform clamp 2 is arranged on the test sleeve 1, the non-uniform clamp 2 comprises an upper non-uniform clamp 21 and a lower non-uniform clamp 22, the upper non-uniform clamp 21 is clamped at the upper end of the test sleeve 1, and the lower non-uniform clamp 22 is clamped at the lower end of the test sleeve 1; the upper end surface of the upper non-uniform clamp 21 is a plane, and the lower end surface is matched with the test sleeve 1; the lower end surface of the lower non-uniform clamp 21 is a plane, and the upper end surface of the lower non-uniform clamp is matched with the test sleeve 1; the upper non-uniform clamp 21 and the lower non-uniform clamp 22 are arranged at intervals to realize loading of radial loads; the radial load system is respectively connected with the upper non-uniform clamp 21 and the lower non-uniform clamp 22, the radial load system is used for applying uniform load to the upper non-uniform clamp 21 and the lower non-uniform clamp 22, and the simulation test of the non-uniform external extrusion load of the test casing 1 is realized through the upper non-uniform clamp 21 and the lower non-uniform clamp 22.
A lead gasket 5 is arranged between the non-uniform clamp 2 and the test sleeve 1, so that the influence of local stress concentration on the deformation of the test sleeve 1 is effectively avoided;
The bending load system 7 is arranged on the non-uniform clamp 2 and used for providing bending load for the test casing, and the bending load system 7 is used for applying the bending load to the middle part of the test casing 1 through the non-uniform clamp 2; the temperature box 8 is arranged on the outer side of the test casing 1, and the temperature box 8 is used for providing temperature load for the test casing 1 and realizing the simulation of the temperature load borne by the casing in underground work; the temperature box 8 comprises a first temperature box 81 and a second temperature box 82, and the first temperature box 81 and the second temperature box 82 are respectively and symmetrically arranged at two sides of the non-uniform clamp 2; thermometers are arranged in the first temperature box 81 and the second temperature box 82 and connected with the monitoring system 9, and are used for detecting the real-time temperature of the test sleeve and transmitting the real-time temperature to the monitoring system 9.
The monitoring system 9 is used for monitoring and acquiring the temperature, pressure, bending and deformation conditions of the test sleeve 1 after load is applied in real time, and the monitoring system 9 is respectively connected with the axial load system 6, the radial load system and the bending load system 7; the strain gauge 91 is used for monitoring the strain of the test sleeve 1, and the temperature, the pressure and the bending degree of the test sleeve 1 in the test all feed back result values to the monitoring system 9 through the corresponding system, so that the quantitative adjustment is convenient; the monitoring system 9 comprises a strain gauge 91 and a data acquisition and analysis system 92; the strain gauge 91 is arranged at one end of the contact surface of the non-uniform clamp 2 and the test sleeve 1, and the strain gauge 91 is connected with a data acquisition and analysis system 92; the strain gauge 91 includes a first strain gauge 911, a second strain gauge 912, a third strain gauge 913, and a fourth strain gauge 914; the first strain gauge 911, the second strain gauge 912, the third strain gauge 913 and the fourth strain gauge 914 are distributed, tightly attached and symmetrically arranged at the intersection position of the non-uniform fixture 2 and the test sleeve 1, four point contact positions exist between the cross section of the test sleeve 1 and the upper non-uniform fixture and between the cross section of the test sleeve 1 and the lower non-uniform fixture, and the four strain gauges 91 are arranged at the point contact positions between the test sleeve 1 and the non-uniform fixture 2 and used for respectively monitoring the strain at the four point contact positions under the loading working condition.
The test sleeve 1 is connected with an internal pressure oil source system 3, the internal pressure oil source system 3 is used for providing internal pressure of the test sleeve 1, and two ends of the test sleeve 1 are respectively provided with a mechanical plugging device.
examples
The testing device of the utility model is suitable for the detection of all specifications of sleeves specified in API Spec 5CT sleeves and oil pipe specifications; the length of the test sleeve is 6 m; the axial load system adopts an axial hydraulic cylinder, the rated load of the axial hydraulic cylinder is 1000t, the bending load system adopts a bending hydraulic cylinder, the rated load of the bending hydraulic cylinder is 1000t, the radial load system adopts a radial hydraulic cylinder, and the rated load of the radial hydraulic cylinder is 1000 t; the rated pressure of an internal oil pressure source is 200MPa, and the highest temperature of a temperature box is 1000 ℃;
preparation of the test: firstly, assembling and fixing a casing string with matched specifications, a non-uniform clamp and the like on a test frame, and installing a temperature box for applying temperature and a thermometer for detecting temperature; then, the strain gauges are tightly close to the intersection positions of the non-uniform clamp and the sleeve and are symmetrically arranged at the A-A' section; finally, the connection between the sleeve deformation monitoring result and the data acquisition and analysis system is realized; the mounted strain gage profile is shown with reference to fig. 3.
The test process comprises the following steps: respectively applying axial load and bending load to the test sleeve through an axial hydraulic cylinder and a bending hydraulic cylinder, respectively applying internal pressure and temperature load through an internal pressure oil source and a temperature box, and applying load to the non-uniform clamp through a radial hydraulic cylinder, wherein after each load is stable, a data acquisition and analysis system acquires the temperature, pressure, bending degree and deformation conditions of a sleeve monitoring point in real time; changing the non-uniformity degree of the non-uniform clamp, namely the size of the distance L between the upper non-uniform clamp and the lower non-uniform clamp, keeping other load environments unchanged, and determining the influence of the non-uniformity degree of the external extrusion load on the deformation of the casing string; testing device possess the inhomogeneous degree casing string of crowded load state of using as a labour outside simulation shale gas well complicated fracturing in-process.
Claims (10)
1. A simulation test device for non-uniform external extrusion of a sleeve is characterized by comprising a test sleeve (1), a non-uniform clamp (2), a radial load system and a sleeve pattern sample loading and fixing device (4); the sleeve type sample loading and fixing device (4) is connected with one end of the test sleeve (1), and the test sleeve (1) is arranged on the test frame through the sleeve type sample loading and fixing device (4); the non-uniform clamp (2) is arranged on the test sleeve (1), the non-uniform clamp (2) comprises an upper non-uniform clamp (21) and a lower non-uniform clamp (22), the upper non-uniform clamp (21) is clamped at the upper end of the test sleeve (1), and the lower non-uniform clamp (22) is clamped at the lower end of the test sleeve (1); the upper end surface of the upper non-uniform clamp (21) is a plane, and the lower end surface of the upper non-uniform clamp is matched with the test sleeve (1); the lower end surface of the lower non-uniform clamp (22) is a plane, and the upper end surface of the lower non-uniform clamp is matched with the test sleeve (1); the upper non-uniform clamp (21) and the lower non-uniform clamp (22) are arranged at intervals; the radial load system is used for applying uniform load to the upper non-uniform clamp (21) and the lower non-uniform clamp (22).
2. The casing non-uniform external extrusion simulation test device according to claim 1, further comprising a lead gasket (5), wherein the lead gasket (5) is arranged between the non-uniform clamp (2) and the test casing (1).
3. the casing non-uniform external extrusion simulation test device according to claim 1, further comprising an axial load system (6), wherein the axial load system (6) is connected with the other end of the test casing (1), and the axial load system (6) is used for providing tensile or compressive load to the test casing (1) along the axial direction.
4. the casing non-uniform external extrusion simulation test device according to claim 1, further comprising a bending load system (7), wherein the bending load system (7) is arranged on the non-uniform clamp (2) and is used for providing bending load for the test casing (1).
5. The casing non-uniform external extrusion simulation test device according to claim 1, further comprising an internal pressure oil source system (3), wherein the internal pressure oil source system (3) is arranged on the test casing (1), the internal pressure oil source system (3) is used for providing internal pressure of the test casing (1), and mechanical plugging devices are respectively arranged at two ends of the test casing (1).
6. The casing non-uniform external extrusion simulation test device according to claim 1, further comprising a temperature box (8), wherein the temperature box (8) is arranged outside the test casing (1), and the temperature box (8) is used for providing a temperature load for the test casing (1); the temperature box (8) comprises a first temperature box (81) and a second temperature box (82), and the first temperature box (81) and the second temperature box are respectively and symmetrically arranged on two sides of the non-uniform clamp (2).
7. The casing non-uniform external extrusion simulation test device according to claim 1, further comprising a monitoring system (9), wherein the monitoring system (9) comprises a strain gauge (91) and a data acquisition and analysis system (92); the strain gauge (91) is arranged at one end of the contact surface of the non-uniform clamp (2) and the test sleeve (1), and the strain gauge (91) is connected with a data acquisition and analysis system (92); and the data acquisition and analysis system (92) is used for acquiring monitoring information at the monitoring point of the sleeve strain gauge in real time through the strain gauge.
8. A casing non-uniform external extrusion simulation test device as claimed in claim 1, wherein the length of the test casing (1) is 6 m.
9. The casing pipe non-uniform external extrusion simulation test device according to claim 1, wherein the rated pressure of the internal oil source system (3) is 200 MPa.
10. a casing non-uniform external extrusion simulation test device according to claim 1, wherein the temperature box (8) has a maximum temperature of 1000 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822244791.9U CN209745708U (en) | 2018-12-28 | 2018-12-28 | Simulation test device for non-uniform external extrusion of sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822244791.9U CN209745708U (en) | 2018-12-28 | 2018-12-28 | Simulation test device for non-uniform external extrusion of sleeve |
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| CN209745708U true CN209745708U (en) | 2019-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304788A (en) * | 2020-09-21 | 2021-02-02 | 中国石油天然气集团有限公司 | Thermal production well casing multi-turn thermal cycle test device and use method |
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2018
- 2018-12-28 CN CN201822244791.9U patent/CN209745708U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304788A (en) * | 2020-09-21 | 2021-02-02 | 中国石油天然气集团有限公司 | Thermal production well casing multi-turn thermal cycle test device and use method |
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