CN216841626U - High-temperature high-pressure well wall stability testing device - Google Patents
High-temperature high-pressure well wall stability testing device Download PDFInfo
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- CN216841626U CN216841626U CN202220330487.XU CN202220330487U CN216841626U CN 216841626 U CN216841626 U CN 216841626U CN 202220330487 U CN202220330487 U CN 202220330487U CN 216841626 U CN216841626 U CN 216841626U
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Abstract
The utility model relates to a testing arrangement, concretely relates to high temperature high pressure wall of a well stability testing arrangement. The testing device consists of a testing kettle, a reciprocating pump and an ultrasonic measuring instrument, wherein a simulation drill rod axially penetrates through the testing kettle; a reciprocating pump, an overlying pressure pump, a simulated formation booster pump and an ultrasonic measuring instrument are arranged outside the test kettle; the reciprocating pump, the overlying pressure pump and the simulated formation booster pump are respectively communicated with the test kettle; the ultrasonic measuring instrument is connected with an ultrasonic probe arranged on the simulation drill rod. The testing device can generate axial pressure to the simulated well wall to simulate the axial pressure of the well wall; the radial pressure can be generated on the simulated well wall to simulate the extrusion force of the well wall; the drilling fluid can circularly simulate the scouring of the well wall, so that the actual working condition of the well wall can be comprehensively simulated; the stability can be analyzed, and the stability of the well wall can be predicted; the problem of current testing arrangement experimental result have the deviation, can not guide production is solved.
Description
Technical Field
The utility model relates to a testing arrangement, concretely relates to high temperature high pressure wall of a well stability testing arrangement.
Background
In the drilling production process, the scouring of the drilling fluid has great influence on the stability of the well wall, and if the compatibility of the drilling fluid and the stratum is poor, a series of drilling safety problems such as well wall collapse, hole shrinkage, hole expansion and the like can be caused. Therefore, the method has strong practical significance for understanding and researching the influence of the drilling fluid on the well wall, preventing major accidents and improving the production efficiency of drilling.
The current common method is to analyze the rock debris, pressure and temperature at the bottom of the well to obtain the condition of the well, thereby judging the stability of the well wall. The method can analyze and obtain the underground condition only after the well wall changes, has delay and is not beneficial to preventing accidents. For accurately judging the stability of the well wall and preventing accidents, an experimental testing device for the stability of the well wall needs to be designed for carrying out experiments, some introductions about the stability testing device of the well wall exist at present, but there are few laboratory application cases, the testing method is not matched with field working conditions, the high-temperature and high-pressure environment of a shaft, the stress environment of the well wall, the pressure transmission condition of the shaft and a stratum and the complicated underground working conditions of the flow state of drilling fluid during drilling cannot be really simulated, the evaluation experimental result is often greatly deviated from the actual working condition, and the evaluation result cannot correctly guide production operation. Therefore, it is necessary to develop a high-temperature and high-pressure borehole wall stability testing device to solve the above problems.
Disclosure of Invention
The utility model aims to provide a: the high-temperature high-pressure well wall stability testing device can accurately simulate actual working conditions and can accurately judge the well wall stability through simulation.
The technical scheme of the utility model is that:
the utility model provides a high temperature high pressure wall of a well stability testing arrangement, it comprises test kettle, piston, simulation drilling rod, reciprocating pump and ultrasonic measurement appearance, its characterized in that: a piston is movably arranged in an assembly cavity of the test kettle, a simulation drill rod axially penetrates through the test kettle, and ultrasonic probes are uniformly distributed on the simulation drill rod; a reciprocating pump, an overlying pressure pump, a simulated formation booster pump and an ultrasonic measuring instrument are arranged outside the test kettle; the outlet end of the reciprocating pump is communicated with the bottom of the test kettle, and the inlet end of the reciprocating pump is communicated with the test kettle through the top end of the simulation drill rod; the upper covering pressure pump is communicated with the assembly cavity above the piston; the simulated formation booster pump is communicated with the circumference of the test kettle through a formation water storage intermediate container; the ultrasonic measuring instrument is connected with the ultrasonic probe through the bottom end of the simulation drill rod; and the communicating pipes between the testing kettle and the overlying pressure pump, between the inlet end of the reciprocating pump and between the formation water storage intermediate container and the testing kettle are respectively provided with a pressure sensor.
The circumference of the test kettle is provided with a simulation shaft heater, the top of the test kettle is provided with a displacement sensor, and the displacement sensor is connected with the piston in an abutting mode.
The simulation drill rod is H-shaped, a communicating hole is formed in the upper end of the simulation drill rod, and the test kettle is communicated with the inlet end of the reciprocating pump through the communicating hole in the simulation drill rod.
The outlet end of the reciprocating pump is also connected with a circulating booster pump through a drilling fluid liquid storage intermediate container, and the outlets of the circulating booster pump, the overburden pressure pump and the simulated formation booster pump are respectively provided with a pressure release valve.
The outlet end of the reciprocating pump is also provided with a liquid discharging valve, and the inlet end of the reciprocating pump is also provided with an exhaust valve.
The reciprocating pump comprises a reciprocating pump body, a reciprocating pump driving motor and a three-way reversing valve.
Furthermore, the bottom end of the simulation drill rod is provided with a rotating motor through a rack, and an output shaft of the rotating motor is connected with the simulation drill rod through a rotating frame; the ultrasonic measuring instrument is arranged on the rotating frame.
Further, the inlet end of the reciprocating pump is communicated with the top of the simulation drill rod through an end cover.
The beneficial effects of the utility model reside in that:
the high-temperature high-pressure well wall stability testing device can generate axial pressure to a simulated well wall by covering a pressure pump and a piston, so that the axial pressure of the well wall in actual working conditions (field working conditions) is simulated; radial pressure can be generated on the simulated well wall by the simulated formation booster pump, so that the extrusion force of the formation on the well wall in the actual working condition is simulated; the reciprocating pump is matched with the circulating booster pump to enable the drilling fluid to circulate in the simulated well wall at high pressure, so that the drilling fluid scours the simulated well wall, and the scouring of the drilling fluid to the well wall in the actual working condition is simulated, so that the actual working condition of the well wall is comprehensively simulated; the simulation well wall can be monitored by matching the ultrasonic probe with the ultrasonic measuring instrument, the stability of the simulation well wall is analyzed, and the stability of the well wall under the actual working condition can be predicted according to the analysis result; the problem of current well wall stability testing arrangement because of can't really simulate on-the-spot operating mode, lead to experimental result to have the deviation, can not guide production is solved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the test kettle of the present invention;
fig. 3 is an enlarged schematic view at a in fig. 2.
In the figure: 1. the device comprises a test kettle, 2, a piston, 3, a simulation drill rod, 4, an ultrasonic measuring instrument, 5, an assembly cavity, 6, an ultrasonic probe, 7, an overlying pressure pump, 8, a simulation stratum booster pump, 9, a stratum water liquid storage intermediate container, 10, a pressure sensor, 11, a simulation shaft heater, 12, a displacement sensor, 13, a communication hole, 14, a drilling fluid liquid storage intermediate container, 15, a circulation booster pump, 16, a pressure release valve, 17, a liquid discharge valve, 18, an exhaust valve, 19, a reciprocating pump body, 20, a reciprocating pump driving motor, 21, a three-way reversing valve, 22, a rotating motor, 23, a rotating frame, 24, an end cover, 25 and a well wall simulation (rock sample).
Detailed Description
The high-temperature high-pressure well wall stability testing device comprises a testing kettle 1, a piston 2, a simulation drill rod 3, a reciprocating pump and an ultrasonic measuring instrument 4, wherein the piston 2 is movably arranged in an assembly cavity 5 of the testing kettle 1 so as to transfer axial pressure downwards through the piston 2 and further simulate the axial pressure on the well wall due to self weight in actual working conditions; a simulated shaft heater 11 is arranged on the circumference of the test kettle 1, so that the inside of the test kettle 1 is heated by the simulated shaft heater 11, and the high temperature of the well wall in the actual working condition is simulated; a displacement sensor 12 is arranged at the top of the test kettle, the displacement sensor 12 is connected with the piston 2 in an abutting mode, the displacement sensor 12 is used for detecting axial displacement and further detecting height change, and therefore the stability of the well wall is analyzed through the height change; the test kettle 1 is axially provided with a simulation drill rod 3 in a penetrating way, so that the simulation drill rod 3 can simulate the drill rod which is actually used, and further the simulation drill rod 3 can simulate the flow of the drilling fluid between the drill rod and the well wall, so that the flow direction and the flow speed of the drilling fluid are consistent with the actual working conditions; a reciprocating pump, an overlying pressure pump 7, a simulated formation booster pump 8 and an ultrasonic measuring instrument 4 are arranged outside the test kettle 1; the reciprocating pump comprises a reciprocating pump body 19, a reciprocating pump driving motor 20 and a three-way reversing valve 21; the outlet end and the 1 bottom intercommunication of test cauldron of reciprocating pump, the inlet end and the 1 intercommunication of test cauldron of reciprocating pump's top through simulation drilling rod 3 specifically do: the simulation drill rod 3 is H-shaped, the upper end of the simulation drill rod 3 is provided with a communicating hole 13, and the inlet end of the reciprocating pump is communicated with the test kettle 1 through the communicating hole 13 on the simulation drill rod 3; the reciprocating pump is used for circulating the drilling fluid between the test kettle 1 and the simulation drill rod 3 at a certain flow rate (the flow rate of the drilling fluid under the actual working condition) and a high pressure (the drilling fluid pressure under the actual working condition), so that the circulation process of the drilling fluid under the actual working condition is simulated; the outlet end of the reciprocating pump is also connected with a circulating booster pump 15 through a drilling fluid storage intermediate container 14, and the circulating booster pump 15 is used for assisting the reciprocating pump to increase the pressure of the drilling fluid in the circulating process of the drilling fluid in the test kettle 1, so that the pressure of the drilling fluid can be rapidly increased in the circulating process; pressure release valves 16 are respectively arranged at outlets of the circulating booster pump 15, the overlying booster pump 7 and the simulated formation booster pump 8, so that after the experiment is finished, the pressures of the circulating booster pump 15, the overlying booster pump 7 and the simulated formation booster pump 8 are respectively released through the pressure release valves 16, the pressure in the test kettle 1 is further reduced, and the test kettle 1 is convenient to disassemble; a liquid discharging valve 17 is further arranged at the outlet end of the reciprocating pump, the liquid discharging valve 17 is used for discharging the drilling fluid in the testing kettle 1 through the liquid discharging valve 17 after the experiment is finished, and meanwhile, the drilling fluid for the experiment is injected into the testing kettle 1 through the liquid discharging valve 17 during liquid injection; an exhaust valve 18 is further arranged at the inlet end of the reciprocating pump, so that air in the testing kettle 1 is exhausted when drilling fluid is injected into the testing kettle 1 through the exhaust valve 18, and meanwhile, the exhaust valve 18 is communicated with the atmosphere when the fluid is discharged, and the situation that the drilling fluid in the testing kettle cannot be exhausted due to atmospheric pressure is avoided; the overlying pressure pump 7 is communicated with the assembly cavity 5 above the piston 2, and the overlying pressure pump 7 is used for keeping the pressure in the assembly cavity 5 constant, so that the pressure on the piston 2 is kept constant, and the axial pressure generated by the piston 2 is kept unchanged; the simulated formation booster pump 8 is communicated with the circumference of the test kettle 1 through a formation water storage intermediate container 9, the simulated formation booster pump 8 boosts the pressure in the test kettle 1, and the radial pressure in the test kettle 1 is kept unchanged in the test process, so that the pressure of the formation on the well wall in the actual working condition is simulated; the simulation drill rod 3 is uniformly provided with the ultrasonic probes 6, the ultrasonic measuring instrument 4 is connected with the ultrasonic probes 6 through the bottom end of the simulation drill rod 3, the ultrasonic measuring instrument 4 is used for monitoring the change condition of the simulation well wall 25 in the test kettle 1 in a matching manner with the ultrasonic probes 6, so that the stability of the simulation well wall 25 is analyzed, the stability of the well wall under the actual working condition is predicted according to the change of the stability of the simulation well wall 25, the production is guided, and accidents are prevented; pressure sensors 10 are respectively arranged on communicating pipes between the test kettle 1 and the overlying pressure pump 7, between the inlet end of the reciprocating pump and between the formation water storage liquid intermediate container 9 and the test kettle 1, so that the pressure at the position of the piston 2, the radial pressure of the test kettle and the circulating pressure of the drilling fluid in the test kettle 1 are monitored through the pressure sensors 10, and the pore pressure transmission condition is analyzed through the pressure.
Before testing, the high-temperature high-pressure well wall stability testing device opens the upper cover of the testing kettle 1, and after the upper cover of the testing kettle 1 is opened, the piston 2 is taken out and placed on one side of the testing kettle 1; after the piston 2 is taken out, the simulation well wall 25 is placed into the test kettle 1; after the simulated well wall 25 is in place, a sealing gasket is placed on the end surface of the top of the simulated well wall 25, and then the piston 2 is tightly pressed on the top of the simulated well wall 25 through the sealing gasket; after the piston 2 is installed, assembling and sealing an upper cover of the test kettle 1; after the upper cover is installed, an exhaust valve 18 and a liquid discharging valve 17 on the testing kettle 1 are opened, drilling fluid is injected into the testing kettle 1 through the liquid discharging valve 17, and the exhaust valve 18 and the liquid discharging valve 17 are closed until the drilling fluid overflows from the exhaust valve 18, namely the drilling fluid is filled in the testing kettle 1.
When the high-temperature high-pressure well wall stability testing device is used for testing, the simulation shaft heater 11 is opened, the drilling fluid in the testing kettle 1 and the simulation well wall 25 are heated through the simulation shaft heater 11, and the temperatures of the drilling fluid and the simulation well wall 25 reach the experimental requirements (namely are consistent with the actual working conditions); after the temperature reaches the standard, respectively opening a reciprocating pump, an overlying pressure pump 7, a simulated formation booster pump 8 and a circulating booster pump 15, and sequentially and alternately lifting the pressure inside a simulated well wall 25, the annular space between the simulated well wall 25 and a test kettle 1 and the pressure in an assembly cavity 5 above a piston 2 at an interval of 1Mpa until the pressure is consistent with the actual working condition pressure, wherein the purpose of alternately lifting the pressure is to avoid the damage to the simulated well wall caused by overlarge differential pressure; after the pressure of the axial side, the radial inner side and the radial outer side of the simulated well wall 25 and the flow rate of the drilling fluid reach the experimental requirements and are stable, starting the ultrasonic measuring instrument 4, and enabling the ultrasonic measuring instrument 4 to monitor the change of the well diameter of the simulated well wall 25 through the ultrasonic probe 6; monitoring the height change of the simulated well wall through a displacement sensor 12; the pressure at the position of the piston 2, the radial pressure of the test kettle and the circulating pressure of the drilling fluid in the test kettle 1 are monitored through a pressure sensor 10; and analyzing the stability change condition of the simulated well wall 25 through the hole diameter, the height and the pressure change of the simulated well wall 25.
As an improvement, the bottom end of the simulation drill rod 3 is provided with a rotating motor 22 through a frame, and an output shaft of the rotating motor 22 is connected with the simulation drill rod 3 through a rotating frame 23; the ultrasonic measuring instrument 4 is arranged on the rotating frame 23; the inlet end of the reciprocating pump is communicated with the top of the simulation drill rod 3 through an end cover 24; the end cover 24 is connected with the top end of the simulation drill rod 3 in a sliding and sealing mode through a sealing gasket (felt or packing); the effect of rotating electrical machines 22 is that rotating electrical machines 22 drives swivel mount 23 and simulation drilling rod 3 and rotates at rotating electrical machines 22 rotation in-process, and then drives ultrasonic measuring instrument 4 and ultrasonic transducer 6 at swivel mount 23 and simulation drilling rod 3 rotation in-process and rotate, makes ultrasonic transducer 6 carry out the anchor ring and measures, and then measures more comprehensively to the simulation wall of a well 25, makes the data more accurate.
When the high-temperature high-pressure well wall stability testing device is used for testing, the simulated shaft heater 11 is opened, the drilling fluid in the testing kettle 1 and the simulated well wall 25 are heated through the simulated shaft heater 11, and the temperatures of the drilling fluid and the simulated well wall 25 meet the experimental requirements; after the temperature reaches the standard, respectively opening a reciprocating pump, an overlying pressure pump 7, a simulated formation booster pump 8 and a circulating booster pump 15, and sequentially and alternately lifting the pressure inside the simulated well wall 25, the annular space between the simulated well wall 25 and the test kettle 1 and the pressure in the assembly cavity 5 above the piston 2 at an interval of 1Mpa to be consistent with the actual working condition pressure, wherein the purpose of alternately lifting the pressure is to avoid the simulated well wall from being damaged by overlarge differential pressure; after the pressure of the axial side, the radial inner side and the radial outer side of the simulated well wall 25 and the flow rate of the drilling fluid meet the experimental requirements and are stable, the ultrasonic measuring instrument 4 and the rotating motor 22 are started, so that the ultrasonic measuring instrument 4 and the ultrasonic probe 6 monitor the change of the well diameter of the simulated well wall 25 in the rotating process; monitoring the height change of the simulated well wall through a displacement sensor 12; the pressure at the position of the piston 2, the radial pressure of the test kettle and the circulating pressure of the drilling fluid in the test kettle 1 are monitored through a pressure sensor 10; and analyzing the stability change condition of the simulated well wall 25 through the hole diameter, the height and the pressure change of the simulated well wall 25.
The high-temperature high-pressure well wall stability testing device can generate axial pressure on a simulated well wall 25 by covering the pressure pump 7 and the piston 2, so that the axial pressure of the well wall in actual working conditions (field working conditions) is simulated; radial pressure can be generated on the simulated well wall 25 through the simulated formation booster pump 8, so that the extrusion force of the formation on the well wall in actual working conditions is simulated; the reciprocating pump is matched with the circulating booster pump 15, so that the drilling fluid can circulate in the simulated well wall at high pressure, the drilling fluid can scour the simulated well wall 25, and the scouring of the drilling fluid on the well wall in the actual working condition can be simulated, so that the actual working condition of the well wall can be comprehensively simulated; the simulation well wall can be monitored by matching the ultrasonic probe 6 with the ultrasonic measuring instrument 4, the stability of the simulation well wall is analyzed, and the stability of the well wall under the actual working condition can be predicted according to the analysis result; the problem of current well wall stability testing arrangement because of can't really simulate on-the-spot operating mode, lead to experimental result to have the deviation, can not guide production is solved.
Claims (8)
1. The utility model provides a high temperature high pressure wall of a well stability test device, it comprises test kettle (1), piston (2), simulation drilling rod (3), reciprocating pump and ultrasonic measurement appearance (4), its characterized in that: a piston (2) is movably arranged in an assembly cavity (5) of the test kettle (1), a simulation drill rod (3) axially penetrates through the test kettle (1), and ultrasonic probes (6) are uniformly distributed on the simulation drill rod (3); a reciprocating pump, an overlying pressure pump (7), a simulated formation booster pump (8) and an ultrasonic measuring instrument (4) are arranged outside the test kettle (1); the outlet end of the reciprocating pump is communicated with the bottom of the testing kettle (1), and the inlet end of the reciprocating pump is communicated with the testing kettle (1) through the top end of the simulation drill rod (3); the overlying pressure pump (7) is communicated with the assembly cavity (5) above the piston (2); the simulated formation booster pump (8) is communicated with the circumference of the test kettle (1) through a formation water liquid storage intermediate container (9); the ultrasonic measuring instrument (4) is connected with the ultrasonic probe (6) through the bottom end of the simulation drill rod (3); and pressure sensors (10) are respectively arranged on communicating pipes between the testing kettle (1) and the overlying pressure pump (7), between the inlet end of the reciprocating pump and between the formation water storage intermediate container (9) and the testing kettle (1).
2. The high-temperature high-pressure well wall stability testing device according to claim 1, characterized in that: the circumference of the test kettle (1) is provided with a simulated shaft heater (11), the top of the test kettle is provided with a displacement sensor (12), and the displacement sensor (12) is connected with the piston (2) in an abutting mode.
3. The high-temperature high-pressure well wall stability testing device according to claim 1, characterized in that: the simulation drill rod (3) is H-shaped, a communicating hole (13) is formed in the upper end of the simulation drill rod (3), and the test kettle (1) is communicated with the inlet end of the reciprocating pump through the communicating hole (13) in the simulation drill rod (3).
4. The high-temperature high-pressure well wall stability testing device according to claim 1, characterized in that: the outlet end of the reciprocating pump is also connected with a circulating booster pump (15) through a drilling fluid liquid storage intermediate container (14), and pressure release valves (16) are respectively arranged on outlets of the circulating booster pump (15), the overburden pressure pump (7) and the simulated formation booster pump (8).
5. The high-temperature high-pressure well wall stability testing device according to claim 4, characterized in that: the outlet end of the reciprocating pump is also provided with a liquid discharging valve (17), and the inlet end of the reciprocating pump is also provided with an exhaust valve (18).
6. The high-temperature high-pressure well wall stability testing device according to claim 5, characterized in that: the reciprocating pump comprises a reciprocating pump body (19), a reciprocating pump driving motor (20) and a three-way reversing valve (21).
7. The high-temperature high-pressure well wall stability testing device according to claim 1, characterized in that: the bottom end of the simulation drill rod (3) is provided with a rotating motor (22) through a rack, and an output shaft of the rotating motor (22) is connected with the simulation drill rod (3) through a rotating frame (23); the ultrasonic measuring instrument (4) is arranged on the rotating frame (23).
8. The high-temperature high-pressure well wall stability testing device according to claim 1, characterized in that: the inlet end of the reciprocating pump is communicated with the top of the simulation drill rod (3) through an end cover (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220330487.XU CN216841626U (en) | 2022-02-18 | 2022-02-18 | High-temperature high-pressure well wall stability testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220330487.XU CN216841626U (en) | 2022-02-18 | 2022-02-18 | High-temperature high-pressure well wall stability testing device |
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| Publication Number | Publication Date |
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| CN216841626U true CN216841626U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220330487.XU Active CN216841626U (en) | 2022-02-18 | 2022-02-18 | High-temperature high-pressure well wall stability testing device |
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| CN (1) | CN216841626U (en) |
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2022
- 2022-02-18 CN CN202220330487.XU patent/CN216841626U/en active Active
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