CN107191164B - Simulation experiment device and method for impact load applied to perforating string - Google Patents
Simulation experiment device and method for impact load applied to perforating string Download PDFInfo
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- CN107191164B CN107191164B CN201710366964.1A CN201710366964A CN107191164B CN 107191164 B CN107191164 B CN 107191164B CN 201710366964 A CN201710366964 A CN 201710366964A CN 107191164 B CN107191164 B CN 107191164B
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- 238000004088 simulation Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000004880 explosion Methods 0.000 claims abstract description 14
- 230000001133 acceleration Effects 0.000 claims description 30
- 239000003999 initiator Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 13
- 230000001360 synchronised effect Effects 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005474 detonation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/001—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells specially adapted for underwater installations
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- Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a simulation experiment device and a simulation experiment method for impact load applied to a perforating string, wherein the simulation experiment device comprises a sleeve, wherein a detachable upper end sealing screw thread and a detachable lower end sealing screw thread are respectively arranged at a first end and a second end of the sleeve; an oil pipe is arranged in the sleeve, one end of the oil pipe is positioned in the sleeve, and the end of the oil pipe is connected with the perforating pipe column; the other end of the oil pipe passes through the first end of the sleeve, and the end of the oil pipe is connected with the oil pipe in a sealing threaded manner; in the sleeve, an oil pipe close to the first end of the sleeve is connected with a packer, and the packer is pressurized and sealed by a first high-pressure pump and then is screwed with the lower end of the sleeve to form a sealed sleeve cavity; the heating rod is inserted into the inner cavity of the sleeve through the second end of the sleeve, and the inner cavity of the sleeve is connected with the second high-pressure pump through a pipeline. The invention can simulate the explosion impact load condition of the perforating string under different temperature and pressure conditions in the well, and has important significance for solving the safety problem of deep water and ultra-deep water perforating operation.
Description
Technical Field
The invention relates to the field of oil and gas exploration, in particular to a simulation experiment device and a simulation experiment method for impact load applied to a perforating string under a simulated downhole temperature and pressure condition.
Background
In deep water and ultra-deep water perforating operation, high-power perforating bullets and high-density perforating guns are widely applied, so that the explosion impact load intensity is further increased, the working environment of a perforating string is severe, and accidents such as buckling and fracture of a tubular column, deblocking and failure of a packer are extremely easy to occur. Therefore, the development of the explosion impact load has great significance on the safety influence research of the perforating string. At present, most of researches on the aspect adopt a finite element simulation means, so that the researches on the real impact load generated by perforation explosion are very few, the existing experimental method can not fully simulate the load of a perforating string under different temperature and pressure conditions, and reliable data can not be provided for the safety evaluation of the perforating string.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a simulation experiment device and a simulation experiment method for the impact load of a perforating string, which can effectively and truly simulate the explosion impact load of the perforating string under different temperature and pressure conditions.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a simulation experiment device for impact load applied to a perforating string is characterized in that: the device comprises a sleeve, wherein a detachable upper end sealing screw thread and a detachable lower end sealing screw thread are respectively arranged at a first end and a second end of the sleeve; an oil pipe is arranged in the sleeve, one end of the oil pipe is positioned in the sleeve, and the end of the oil pipe is connected with a perforating string; the other end of the oil pipe passes through the first end of the sleeve, and the end of the oil pipe is connected with the oil pipe in a sealing threaded manner; in the sleeve, the oil pipe close to the first end of the sleeve is connected with a packer, and the packer is pressurized and set by a first high-pressure pump and then is sealed with the lower end by screw threads to form a sealed sleeve inner cavity; the heating rod passes through the second end of the sleeve and is inserted into the inner cavity of the sleeve, and the inner cavity of the sleeve is connected with the second high-pressure pump through a pipeline.
Further, the other end of the oil pipe is connected with the first high-pressure pump through a pipeline, a first high-pressure pump control valve is further arranged on the pipeline between the first high-pressure pump and the oil pipe, and a first high-pressure pump pressure sensor is arranged on the pipeline between the first high-pressure pump control valve and the first high-pressure pump.
Further, a second high-pressure pump control valve is arranged on a pipeline between the second high-pressure pump and the sleeve inner cavity, and a second high-pressure pump pressure sensor is arranged on a pipeline between the second high-pressure pump control valve and the second high-pressure pump.
Further, the device also comprises a temperature sensor, a plurality of piezoelectric pressure sensors, a connecting piece and a plurality of piezoelectric acceleration sensors; the temperature sensor is inserted into the sleeve cavity through the sleeve second end; each piezoelectric pressure sensor is respectively arranged at the bottom end of the packer, the side surface of the lower end of the oil pipe and the bottom end of the perforating string; the connecting piece of the groove type structure is arranged at the bottom end of the perforating string, and each piezoelectric acceleration sensor is arranged on the connecting piece.
Further, each piezoelectric acceleration sensor is respectively arranged in the side face of the connecting piece, the bottom end of the connecting piece and the groove on the lower bottom face of the connecting piece; the two piezoelectric acceleration sensors positioned in the groove on the lower bottom surface of the connecting piece are symmetrically arranged at the center of 180 degrees.
Further, the device also comprises a multichannel data acquisition instrument, a charge amplifier and an oscilloscope; all the piezoelectric pressure sensors and all the piezoelectric acceleration sensors are connected with the multichannel data acquisition instrument through the charge amplifier, and the multichannel data acquisition instrument is connected with the oscilloscope; and the sensors are connected with the charge amplifier by adopting a high-frequency transmission cable.
Further, the apparatus includes a computer; the heating rod, the temperature sensor, the multichannel data acquisition instrument, the first high-pressure pump pressure sensor, the second high-pressure pump and the second high-pressure pump pressure sensor are all connected with the computer.
Further, the device also comprises a detonating cord, a detonator initiator, an electric probe and a synchronous trigger; the perforating charges in the perforating string are connected with the detonator initiator through the detonating cord, the detonator initiator is also connected with the synchronous trigger through the electric probe, and the synchronous trigger triggers the multichannel data acquisition instrument to start data acquisition; and the barrel explosion impact response generated by the detonator exploder is subjected to data acquisition by each piezoelectric pressure sensor and each piezoelectric acceleration sensor.
The simulation experiment method of the impact load applied to the perforating string based on the device is characterized by comprising the following steps: 1) Respectively connecting the sleeve with the lower end sealing screw thread, the connecting piece with the bottom end of the perforating string, the perforating string with the oil pipe and the oil pipe with the packer; 2) The oil pipe and the perforating pipe column are put into a sleeve, well fluid is injected into the inner cavity of the sleeve, and an oil pipe sealing screw thread is connected with the oil pipe; 3) The packer setting is tightly contacted with the inner wall of the sleeve through the pressurization setting of the first high-pressure pump, a closed sleeve cavity is formed by the packer setting, the sleeve and the lower end sealing screw thread, and the upper end sealing screw thread is connected with the sleeve; 4) Placing the mounted experimental device into a soil pit and fixing; 5) The second high-pressure pump applies to the sealed casing cavity a set well hydraulic pressure; 6) The heating rod heats the well liquid in the inner cavity of the sleeve to a set temperature; 7) The detonator detonators connected through the detonating cord detonate the perforating charges, and the electric probes connected with the detonator detonators trigger the synchronous trigger, so that the multichannel data acquisition instrument is in a working state; meanwhile, the data measured by the piezoelectric pressure sensor and the piezoelectric acceleration sensor are amplified by a charge amplifier, transmitted to a multichannel data acquisition instrument for data acquisition, then transmitted to a computer for storage, and displayed on an oscilloscope.
Further, the temperature data applied by the heating rod to the well fluid in the sleeve cavity is 150 ℃; the second high-pressure pump applies a pressure of 40MPa to the sleeve inner cavity.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. according to the invention, a lower end sealing thread is arranged at the second end of the sleeve, well fluid is added, a first high-pressure pump is used for pressurizing and setting the packer to form a sealed sleeve cavity, a second high-pressure pump is used for applying pressure to the sleeve cavity, a heating rod is used for heating the well fluid to a set temperature, a high-pressure pump pressure sensor and a temperature sensor are used for collecting data, a mechanical sensor in the sleeve cavity is used for collecting data of explosion impact load born by a perforating string, an electric probe is used for transmitting a signal when a detonator exploder explodes to a synchronous trigger so that a multichannel data collector starts to work and is ready to receive the data signal, the collected data is transmitted to a charge amplifier through a high-frequency transmission cable, the amplified data is transmitted to the multichannel data collector for collecting data, an experimental data curve after the perforation bullet explodes is observed through an oscilloscope, and the experimental data is stored through a computer, so that the condition of explosion impact load born by the string under different temperature and pressure conditions is simulated. 2. The simulation experiment method provided by the invention can simulate the explosion impact load condition of the perforating string under different temperature and pressure conditions, and provide experimental data for the damage evaluation of the perforating string, the oil pipe and the packer so as to select a more reasonable perforating well completion scheme.
Drawings
FIG. 1 is a schematic diagram of a simulation experiment apparatus of the present invention;
FIG. 2 is a cross-sectional view of C-C of FIG. 1;
FIG. 3 is a schematic diagram of the detonator initiator, electrical probe and synchronous trigger configuration in the simulation experiment device of the present invention;
FIG. 4 is a schematic diagram of the connection of a perforating charge and detonator initiator in a simulation experiment device of the present invention;
FIG. 5 is a flow chart of a simulation experiment method of the present invention.
Detailed Description
In view of the fact that the prior art cannot fully simulate the magnitude of explosion impact load applied to a perforating string under different temperature and pressure conditions in the pit, the invention provides a simulation experiment device for simulating the explosion impact load applied to the perforating string under the temperature and pressure conditions in the pit. The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the simulation experiment device of the present invention comprises a sleeve 1, and a detachable upper end sealing screw thread 2 and a detachable lower end sealing screw thread 3 are respectively installed on a first end and a second end of the sleeve 1. An oil pipe 4 is arranged in the casing 1, one end of the oil pipe 4 is positioned in the casing 1, and the end is connected with a perforating string 5; the other end of the tubing 4 passes through the first end of the casing 1 and the end of the tubing 4 is connected to a tubing seal screw 6. In the casing 1, an oil pipe 4 near the first end of the casing 1 is connected with a packer 7, and the packer 7 is pressurized and set by a first high-pressure pump 8 and then forms a sealed casing cavity 9 with a lower end sealing screw thread 3. A heating rod 10 is inserted into the inner cavity 9 of the sleeve through the second end of the sleeve 1 and is used for heating the well fluid to a set temperature, so that heat is transmitted outwards, and the high-temperature fluid and the temperature environment in the well are simulated; the heating rod 10 can be heated by adopting an electric heating mode, and the well liquid can be replaced according to actual conditions. The sleeve inner chamber 9 is connected to a second high-pressure pump 11 via a pipeline, and a set pressure is applied to the sealed sleeve inner chamber 9 by the second high-pressure pump 11.
In a preferred embodiment, the other end of the oil line 4 is connected to the first high-pressure pump 8 via a line, a first high-pressure pump control valve 12 being further provided on the line between the first high-pressure pump 8 and the oil line 4, and a first high-pressure pump pressure sensor 13 being provided on the line between the first high-pressure pump control valve 12 and the first high-pressure pump 8 for collecting high-pressure pump data.
In a preferred embodiment, a second high-pressure pump control valve 14 is arranged in the line between the second high-pressure pump 11 and the sleeve interior 9, and a second high-pressure pump pressure sensor 15 is arranged in the line between the second high-pressure pump control valve 14 and the second high-pressure pump 11 for recording high-pressure data.
In a preferred embodiment, the simulation experiment apparatus of the present invention further comprises a temperature sensor 16, the temperature sensor 16 being inserted into the cannula lumen 9 through the second end of the cannula 1 for acquiring temperature data.
In a preferred embodiment, the simulation experiment apparatus of the present invention further comprises a plurality of piezoelectric pressure sensors 17, a connection 18 and a plurality of piezoelectric acceleration sensors 19. The piezoelectric pressure sensor 17 is arranged at the bottom end of the packer 7 and is used for acquiring annular axial pressure data; the piezoelectric pressure sensor 17 is arranged on the side surface of the lower end of the oil pipe 4 and is used for acquiring annular radial pressure data; and the piezoelectric pressure sensor 17 is arranged at the bottom end of the perforating string 5 and is used for acquiring the axial pressure data of the perforating string. The connecting piece 18 adopts a groove type structure, is connected with the bottom end of the perforating string 5, and each piezoelectric acceleration sensor 19 is arranged on the connecting piece 18; the piezoelectric acceleration sensor 19 is positioned on the side surface of the connecting piece 18 and is used for acquiring radial movement data of the perforating string; the piezoelectric acceleration sensor 19 is positioned at the bottom end of the connecting piece 18 and is used for acquiring the axial movement data of the perforating string; two piezoelectric acceleration sensors 19 positioned in the grooves on the lower bottom surface of the connecting piece 18 are symmetrically arranged at 180-degree centers (as shown in fig. 2) and are used for collecting motion data of the perforating string in the circumferential direction.
In a preferred embodiment, the analog experimental apparatus of the present invention further comprises a charge amplifier 20, a multi-channel data acquisition instrument 21, and an oscilloscope 22. All piezoelectric pressure sensors 17 and all piezoelectric acceleration sensors 19 are connected with a multichannel data acquisition instrument 21 through a charge amplifier 20, the multichannel data acquisition instrument 21 is connected with an oscilloscope 22, and acquired data are displayed on the oscilloscope 22 in a data curve. Wherein the sensors are connected to the charge amplifier 20 by a high frequency transmission cable 23 (as shown in fig. 3).
In a preferred embodiment, the simulation experiment apparatus of the present invention further comprises a computer 24. The heating rod 10, the temperature sensor 16, the multichannel data acquisition instrument 21, the first high-pressure pump 8, the first high-pressure pump pressure sensor 13, the second high-pressure pump 11 and the second high-pressure pump pressure sensor 15 are all connected with the computer 24, and the computer 24 controls the operation of all devices and acquires related data: controlling the heating rod 10 to heat the well fluid; the first high-pressure pump 8 is controlled to press and set the packer 7 into the oil pipe 4, so that a sealed sleeve cavity 9 is formed between the packer 7 and the lower end sealing screw thread 3; the second high-pressure pump 11 is controlled to apply a set pressure to the sealed sleeve cavity 9, and temperature data from the temperature sensor 16, pressure data from the second high-pressure pump pressure sensor 15, pressure data from the first high-pressure pump pressure sensor 13, and pressure and acceleration data from the multi-channel data acquisition instrument 21 are acquired.
In a preferred embodiment, as shown in fig. 3 and 4, the simulation experiment apparatus of the present invention further comprises a detonating cord 25, a detonator initiator 26, an electrical probe 27 and a synchronization trigger 28. The perforating charges 29 in the perforating string 5 are connected with a detonator initiator 26 through detonating cords 25, and the detonator initiator 26 is used for detonating the perforating charges 27 so as to perform detonation perforation operation; the barrel explosion impact response generated by the detonator initiator 26 is subjected to data acquisition by each piezoelectric pressure sensor 17 and each piezoelectric acceleration sensor 19, the detonator initiator 26 is also connected with a synchronous trigger 28 through an electric probe 27, and the synchronous trigger 28 triggers the multichannel data acquisition instrument 21 to start data acquisition.
Based on the simulation experiment device, the invention also provides a simulation experiment method for simulating the impact load applied to the perforating string under the downhole temperature and pressure condition, as described in the following embodiment. Because the principle of the method for solving the problem is similar to that of an experimental device for simulating the impact load of the perforating string under the underground temperature and pressure condition, the implementation of the method can be referred to as the experimental device for simulating the impact load of the perforating string under the underground temperature and pressure condition, and repeated parts are omitted.
As shown in fig. 5, the experimental method of the present invention includes the steps of:
1) The casing 1 is respectively connected with the lower end sealing screw thread 3, the connecting piece 18 and the bottom end of the perforating string 5, the perforating string 5 and the oil pipe 4, and the oil pipe 4 and the packer 7;
2) The oil pipe 4 and the perforating pipe column 5 are put into the sleeve 1, well fluid is injected into the inner cavity 9 of the sleeve, and the oil pipe sealing screw thread 6 is connected with the oil pipe 4;
3) The packer 7 is set by the first high-pressure pump 8 to be in close contact with the inner wall of the sleeve 1, and forms a sealed sleeve inner cavity 9 with the sleeve 1 and the lower sealing screw thread 3, and the upper sealing screw thread 2 is connected with the sleeve 1;
4) Placing the mounted experimental device into a soil pit and fixing;
5) The second high pressure pump 11 applies a set well fluid pressure to the closed casing cavity 9;
6) The heating rod 10 heats the well fluid in the sleeve cavity 9 to a set temperature;
7) The detonator initiator 26 connected with the detonating cord 25 detonates the perforating charge 29, and the electric probe 27 connected with the detonator initiator 26 triggers the synchronous trigger 28, so that the multichannel data acquisition instrument 21 is in a working state; meanwhile, the data measured by the piezoelectric pressure sensor 17 and the piezoelectric acceleration sensor 19 are amplified by the charge amplifier 20, transmitted to the multichannel data acquisition instrument 21 for data acquisition, and then transmitted to the computer 24 for storage, and a data curve can be displayed on the oscilloscope 22.
In step 1), the piezoelectric pressure sensor 17 and the piezoelectric acceleration sensor 19 are fixed by screws. The surface of the piezoelectric acceleration sensor 19 is subjected to heat insulation treatment, so that the piezoelectric acceleration sensor can work normally in a high-temperature environment.
In the step 2), the types of the perforating strings 5 are changed to test the explosion impact load applied to the perforating strings 5 of different types, and the phases of the perforating charges 29 can be properly adjusted according to actual needs; the well fluid can be replaced according to experimental requirements.
In the step 4), the setting position of the packer 7 can be adjusted according to the length of the bottom pocket, so as to simulate the influence of the length of the bottom pocket on the impact load applied to the perforating string 5.
In the above steps 5) and 6), the temperature data applied by the heating rod 10 to the well fluid in the casing cavity 9 may be 150 ℃ to simulate the formation temperature; the second high pressure pump 11 may apply a pressure of 40MPa to the casing bore 9 to simulate formation pressure.
In summary, when the simulation experiment method of the present invention is used, the main technical indexes thereof may be set as follows: experimental temperature: 100-170 ℃; internal pressure: 0-50MPa; perforating gun size: outer diameter 127mm (5 inch), wall thickness 13mm, length 1300mm; perforating bullet specification: 37g, RDX powder charge, 16 charges; perforation phase: 60 degrees; oil pipe dimensions: 73.02mm (2 7/8 inch) in outer diameter, 59mm in inner diameter, 7.01mm in wall thickness and 1300mm in length or the size and specification of the oil pipe can be selected according to experimental conditions; packer dimensions: the maximum external diameter is 145mm, the minimum drift diameter is 65mm, the length is 500mm, and the connecting screw threads at two ends are 2 7/8 inch TBG or the size and specification of the packer are selected according to the actual situation; sleeve size: an outer diameter of 177.8mm (7 inches), an inner diameter of 157.07mm; the wall thickness is 10.36mm, the length is 4000mm or the length is selected according to the experimental conditions; the pressurizing range of the high-pressure pump is 0-50MPa; range of piezoelectric pressure sensor: 250MPa; range of piezoelectric acceleration sensor: 10×10 4 g。
The foregoing embodiments are only illustrative of the present invention, and the structure, dimensions, placement and shape of the components may vary, and all modifications and equivalents of the individual components based on the teachings of the present invention should not be excluded from the scope of protection of the present invention.
Claims (4)
1. A simulation experiment device for impact load applied to a perforating string is characterized in that: the device comprises a sleeve, wherein a detachable upper end sealing screw thread and a detachable lower end sealing screw thread are respectively arranged at a first end and a second end of the sleeve; an oil pipe is arranged in the sleeve, one end of the oil pipe is positioned in the sleeve, and the one end of the oil pipe is connected with a perforating string; the other end of the oil pipe passes through the first end of the sleeve, and the other end of the oil pipe is connected with the oil pipe through a sealing screw thread; in the sleeve, the oil pipe close to the first end of the sleeve is connected with a packer, the packer is pressurized and set by a first high-pressure pump and then forms a closed sleeve inner cavity with the lower end sealing screw thread, the packer is pressurized and set by the first high-pressure pump to enable the packer to be in close contact with the inner wall of the sleeve and form a closed sleeve inner cavity with the sleeve and the lower end sealing screw thread, and the upper end sealing screw thread is connected with the sleeve; the heating rod is inserted into the sleeve cavity through the second end of the sleeve, the sleeve cavity is connected with a second high-pressure pump through a pipeline, and the second high-pressure pump applies set well hydraulic pressure to the sealed sleeve cavity;
the other end of the oil pipe is connected with the first high-pressure pump through a pipeline, a first high-pressure pump control valve is further arranged on the pipeline between the first high-pressure pump and the oil pipe, and a first high-pressure pump pressure sensor is arranged on the pipeline between the first high-pressure pump control valve and the first high-pressure pump;
a second high-pressure pump control valve is arranged on a pipeline between the second high-pressure pump and the sleeve inner cavity, and a second high-pressure pump pressure sensor is arranged on a pipeline between the second high-pressure pump control valve and the second high-pressure pump;
the apparatus further comprises: the device comprises a temperature sensor, a plurality of piezoelectric pressure sensors, a connecting piece and a plurality of piezoelectric acceleration sensors; the temperature sensor is inserted into the sleeve cavity through the sleeve second end; each piezoelectric pressure sensor is respectively arranged at the bottom end of the packer, the side surface of the lower end of the oil pipe and the bottom end of the perforating string; the connecting piece of the groove type structure is arranged at the bottom end of the perforating string, and each piezoelectric acceleration sensor is arranged on the connecting piece; the piezoelectric pressure sensor is arranged at the bottom end of the packer and is used for collecting annular axial pressure data; the piezoelectric pressure sensor is arranged on the side face of the lower end of the oil pipe and used for collecting annular radial pressure data; the piezoelectric pressure sensor is arranged at the bottom end of the perforating string and used for acquiring axial pressure data of the perforating string;
each piezoelectric acceleration sensor is respectively arranged in the side face of the connecting piece, the bottom end of the connecting piece and the groove on the lower bottom face of the connecting piece; the two piezoelectric acceleration sensors positioned in the groove on the lower bottom surface of the connecting piece are symmetrically arranged at the center of 180 degrees; the piezoelectric acceleration sensor is positioned on the side surface of the connecting piece and used for acquiring radial movement data of the perforating string; the piezoelectric acceleration sensor is positioned at the bottom end of the connecting piece and used for acquiring the axial movement data of the perforating string; two piezoelectric acceleration sensors positioned in the groove on the lower bottom surface of the connecting piece are symmetrically arranged at 180-degree centers and are used for collecting motion data of the perforating string in the circumferential direction;
the device also comprises a multichannel data acquisition instrument, a charge amplifier and an oscilloscope; all the piezoelectric pressure sensors and all the piezoelectric acceleration sensors are connected with the multichannel data acquisition instrument through the charge amplifier, and the multichannel data acquisition instrument is connected with the oscilloscope; the sensors are connected with the charge amplifier through high-frequency transmission cables;
further comprises: detonating cord, detonator initiator, electrical probe and synchronous trigger; the perforating charges in the perforating string are connected with the detonator initiator through the detonating cord, the detonator initiator is also connected with the synchronous trigger through the electric probe, and the synchronous trigger triggers the multichannel data acquisition instrument to start data acquisition; and the barrel explosion impact response generated by the detonator exploder is subjected to data acquisition by each piezoelectric pressure sensor and each piezoelectric acceleration sensor.
2. A simulation experiment apparatus for an impact load applied to a perforating string as defined in claim 1, wherein: the apparatus also includes a computer; the heating rod, the temperature sensor, the multichannel data acquisition instrument, the first high-pressure pump pressure sensor, the second high-pressure pump and the second high-pressure pump pressure sensor are all connected with the computer.
3. A method of simulating an impact load on a perforating string based on the apparatus of claim 1 or 2, comprising the steps of:
1) Respectively connecting the sleeve with the lower end sealing screw thread, the connecting piece with the bottom end of the perforating string, the perforating string with the oil pipe and the oil pipe with the packer;
2) The oil pipe and the perforating pipe column are put into a sleeve, well fluid is injected into the inner cavity of the sleeve, and an oil pipe sealing screw thread is connected with the oil pipe;
3) The packer setting is tightly contacted with the inner wall of the sleeve through the pressurization setting of the first high-pressure pump, a closed sleeve cavity is formed by the packer setting, the sleeve and the lower end sealing screw thread, and the upper end sealing screw thread is connected with the sleeve;
4) Placing the mounted experimental device into a soil pit and fixing;
5) The second high-pressure pump applies to the sealed casing cavity a set well hydraulic pressure;
6) The heating rod heats the well liquid in the inner cavity of the sleeve to a set temperature;
7) The detonator detonators connected through the detonating cord detonate the perforating charges, and the electric probes connected with the detonator detonators trigger the synchronous trigger, so that the multichannel data acquisition instrument is in a working state; meanwhile, the data measured by the piezoelectric pressure sensor and the piezoelectric acceleration sensor are amplified by a charge amplifier, transmitted to a multichannel data acquisition instrument for data acquisition, then transmitted to a computer for storage, and displayed on an oscilloscope.
4. A method of simulating an impact load on a perforating string as recited in claim 3 wherein: the temperature data applied by the heating rod to the well liquid in the inner cavity of the sleeve is 150 ℃; the second high-pressure pump applies a pressure of 40MPa to the sleeve inner cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710366964.1A CN107191164B (en) | 2017-05-23 | 2017-05-23 | Simulation experiment device and method for impact load applied to perforating string |
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| CN201710366964.1A CN107191164B (en) | 2017-05-23 | 2017-05-23 | Simulation experiment device and method for impact load applied to perforating string |
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| CN107191164A CN107191164A (en) | 2017-09-22 |
| CN107191164B true CN107191164B (en) | 2024-04-02 |
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| CN110245383B (en) * | 2019-05-16 | 2023-07-25 | 中国石油天然气集团有限公司 | Output calculation method for axial dynamic load after perforation explosion |
| CN110705012B (en) * | 2019-08-21 | 2023-10-31 | 中国石油天然气集团有限公司 | Oil sleeve annular pressure control method based on compression capacity of tubular column joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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