Testing device for acoustic logging-while-drilling instrument

Abstract

The invention discloses a testing device for an acoustic logging-while-drilling instrument, and relates to the technical field of testing devices.The testing device comprises a base and a testing mechanism, the testing mechanism comprises a fixing sleeve, a rotating plate is movably connected to the outer surface of the fixing sleeve, grooves are formed in the center and the eccentric position of the rotating plate, a rotating rod is fixedly connected to the interior of the groove in the center, and the rotating rod is movably connected to the outer surface of the fixing sleeve. One end of the rotating rod is rotatably connected with the body of the fixed sleeve in a penetrating manner and extends to the outside of the fixed sleeve, a hollow sample column is fixedly connected to the interior of the groove at the eccentric position, and an emitter is slidably connected to the interior of the sample column in a penetrating manner. The problems that in the prior art, when multiple shafts are used for testing, the occupied space is increased due to the fact that the shafts are transversely arranged, the occupied space is further increased when multiple shafts are used for testing, meanwhile, liquid consumption is large due to the fact that the sizes of the shafts are large, and hydraulic pressure and testing results are easily affected by inner pulleys in the shafts are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a testing device for a while-drilling acoustic logging instrument. BACKGROUND

[0002] The prior art tests the while-drilling acoustic logging instrument, in order to simulate soft and hard strata with different sound velocities such as limestone and sandstone, usually a plurality of wellbores are cast underground, and the while-drilling acoustic logging instrument is placed in the wellbores filled with liquid for testing. This method not only has a large construction cost, but also cannot be debugged online. An application patent with publication number CN107676081A discloses a testing device for a while-drilling acoustic logging instrument, which comprises a wellbore, a flange plate, a plug, a water inlet pipe, a water outlet pipe, an inner pulley support, and a wellbore support, and is suitable for ground calibration and performance testing of a while-drilling acoustic logging instrument in the oil drilling industry.

[0003] Although the device solves the problem of large construction cost of the existing underground wellbore, it still has the following defects in actual testing: The device lays the wellbore horizontally, which occupies a large space on the ground. Each group of wellbores can only simulate one underground environment, and using multiple wellbores for testing will further increase the space occupation. Due to the large volume of the wellbore, a large amount of liquid is consumed for testing, and the built-in inner pulley easily affects the internal liquid pressure and the test results.

[0004] Therefore, the existing problems of the testing device need to be solved. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a testing device for a while-drilling acoustic logging instrument, which solves the problem that the horizontal placement of the wellbore in the prior art testing device for a while-drilling acoustic logging instrument increases the space occupation on the ground, and the use of multiple wellbores for testing further increases the space occupation. In addition, the large volume of the wellbore leads to a large consumption of liquid, and the inner pulley inside the wellbore easily affects the hydraulic pressure and the test results.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: a testing device for a while-drilling acoustic logging instrument, comprising a base and a testing mechanism, the testing mechanism comprises a fixed sleeve, the outer surface of the fixed sleeve is movably connected with a rotating plate, the center and the eccentric part of the rotating plate are provided with recesses, the inside of the recess at the center is fixedly connected with a rotating rod, one end of the rotating rod penetrates the rotating connection of the body of the fixed sleeve and extends to the outside of the fixed sleeve, and the inside of the recess at the eccentric part is fixedly connected with a hollow sample column, the inside of the sample column is slidably connected with a transmitter, the outer surface of the transmitter is slidably connected with the inside of the fixed sleeve, and the inside of the fixed sleeve is provided with a receiver. A traction assembly is arranged inside the fixed sleeve to drive the launcher to move up and down through traction. An auxiliary assembly is arranged inside the groove to control the coupling agent to enter the sample column to simulate the test environment.

[0007] Preferably, the inside of the fixed sleeve is fixedly connected with a fixed column, the body of the fixed column is rotatably connected with the outer surface of the rotating rod, the outer surface of the fixed column is fixedly connected with the outer surface of the baffle, and the outer surface of the baffle is fixedly connected with the outer surface of the receiver.

[0008] Preferably, the traction assembly comprises a sliding rail, the outer surface of the sliding rail is fixedly connected with the outer surface of the baffle, the outer surface of the sliding rail is slidingly connected with a linear motor, the outer surface of the linear motor is fixedly connected with a traction rope, the outer surface of the traction rope is drivingly connected with a fixed pulley, and the outer surface of the fixed pulley is fixedly connected with the outer surface of the baffle.

[0009] Preferably, the outer surface of the sliding rail is provided with a winding drum, the body of the winding drum is rotatably connected with a supporting rod, and the two ends of the supporting rod are fixedly connected with the outer surface of the baffle.

[0010] Preferably, the outer surface of the supporting rod is sleeved with a torsional spring, and the two ends of the torsional spring are fixedly connected with the outer surfaces of the baffle and the winding drum, respectively.

[0011] Preferably, the outer surface of the traction rope is provided with a connecting unit, the connecting unit comprises two clamping sleeves, the outer surfaces of the two clamping sleeves are in abutment, the interiors of the two clamping sleeves are fixedly connected with two films, and the outer surfaces of the two films are movably connected with one end of the launcher.

[0012] Preferably, the outer surfaces of the two clamping sleeves are both provided with wire holes, and the interiors of the wire holes are in communication with the interiors of the clamping sleeves.

[0013] Preferably, the outer surfaces of the two clamping sleeves are both fixedly connected with arc strips, the outer surfaces of the two arc strips are in abutment, the outer surface of the arc strip is threadedly connected with a screw pipe, one end of the screw pipe is fixedly connected with a rope ring, and one end of the traction rope is woundly connected with the outer surface of the rope ring.

[0014] Preferably, the auxiliary assembly comprises a liquid tank, the outer surface of the liquid tank is fixedly connected with the interior of the groove, the interior of the liquid tank is penetratingly communicated with a liquid pipe, and one end of the liquid pipe is penetratingly communicated with the interior of the sample column.

[0015] Preferably, one end of the liquid pipe is provided with an abutting strip, the outer surface of the abutting strip is fixedly connected with the inside of the sample column, the outer surface of the abutting strip is movably connected with a sliding cylinder, the outer surface of the sliding cylinder is slidably connected with the inside of the sample column, and the inside of the sliding cylinder is slidably connected with the outer surface of the transmitter.

[0016] The application provides a testing device for a while-drilling acoustic logging instrument. (1) By arranging the testing mechanism, the sample column made of existing metal or non-metal material is used, and the known acoustic characteristics of the material are used to simulate the propagation environment of the "known formation", so that the transmitter of the acoustic system part of the existing while-drilling acoustic logging instrument is placed in the hollow sample column, the signal is generated in the sample column, and the signal is received by the receiver of the acoustic system part, so that the acoustic system part of the while-drilling acoustic logging instrument can be tested and adjusted, and multiple while-drilling acoustic logging instruments can be arranged for detection at the same time through the partition of the partition plate, and multiple testing environments can be provided for the while-drilling acoustic logging instrument through the arrangement of multiple sample columns in the groove, so that the accuracy of the detection result is improved, and the space occupation on the ground is reduced.

[0017] (2) By arranging the traction assembly, the linear motor moves along the sliding rail, so that the transmitter is driven to move synchronously by the traction rope, so that the traction rope moves in and out of the sample column, so that the accuracy of the test result is improved through cooperation with multiple sample columns, and the traction rope is supported and the direction of the force is converted by the fixed pulley, so that the linear motor can better pull the sample column through the traction rope, and the length adjustment of the connecting wire can be facilitated by the arrangement of the winding drum and the torsional spring, and the problem of easy mutual entanglement of the connecting wire caused by disordered storage of the connecting wire can be avoided by winding of the winding drum, and the space occupation of the connecting wire can be reduced.

[0018] (3) By arranging the connecting unit, the transmitter can be clamped by folding the two clamping sleeves, and the problem of clamping the transmitter can be avoided by arranging the film, and the transmitter can be easily pulled by the rope ring and the traction rope.

[0019] (4) By arranging the auxiliary assembly, the liquid tank and the liquid pipe can fill the coupling agent liquid in the sample column, so as to better simulate the underground environment, and the liquid top-up sliding cylinder is lifted, and the sliding cylinder and the transmitter are sleeved, so as to improve the problem and the sealing performance of the transmitter in the sample column, and when the transmitter slides out of the sample column, the sliding cylinder can scrape the liquid on the surface of the transmitter, so as to reduce the consumption of the coupling agent, and the stability of the internal environment of the fixed sleeve can be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1The internal structure of the fixed sleeve of the application is shown in the perspective view; Figure 2 The external structure of the rotating rod of the application is shown in the perspective view; Figure 3 The external structure of the drum of the application is shown in the perspective view; Figure 4 The internal structure of the clamping sleeve of the application is shown in the perspective view; Figure 5 The internal structure of the sample column of the application is shown in the perspective view.

[0021] In the figure: 1, base; 2, fixed sleeve; 3, rotating plate; 4, sample column; 5, auxiliary assembly; 51, liquid tank; 52, liquid pipe; 53, resistance bar; 54, sliding cylinder; 6, launcher; 7, traction assembly; 71, sliding rail; 72, linear motor; 73, fixed pulley; 74, drum; 75, support rod; 76, torsional spring; 77, connecting unit; 771, clamping sleeve; 772, film; 773, wire hole; 774, arc bar; 775, screw pipe; 776, rope ring; 8, rotating rod; 9, receiver; 10, fixed column; 11, partition; 12, groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0023] Please refer to Figures 1-5 The application provides a technical solution: a testing device for a while-drilling acoustic logging instrument: The embodiment one comprises a base 1, as a preferred mode, the base 1 can be fixed in the existing reaction kettle to provide a high temperature and high pressure environment for testing, thereby improving the degree of environmental simulation, the outside of the base 1 is provided with a test mechanism, the test mechanism comprises a fixed sleeve 2, the outer surface of the fixed sleeve 2 is movably connected with a rotating plate 3, the rotating plate 3 can be connected with the fixed sleeve 2 through the existing detachable fixing structure and a rotary sealing element, the center and the eccentric position of the rotating plate 3 are provided with recesses 12, the recesses 12 at the eccentric position are arranged at equal angles around the axis of the rotating plate 3, the inner diameter of the recess 12 at the center is larger than the outer diameter of a rotating rod 8, and the recess 12 at the center is fixedly connected with the rotating rod 8 through a detachable fixing structure (automatic operation) and one end of the rotating rod 8, one end of the rotating rod 8 is connected with an external high-temperature-resistant and explosion-proof driving machine to obtain power to drive the rotating plate 3 to rotate, one end of the rotating rod 8 is rotatably connected with the body of the fixed sleeve 2 and extends to the outside of the fixed sleeve 2, the hollow sample column 4 is fixedly connected in the recess 12 at the eccentric position, the sample column 4 is made of metal or non-metal material (such as an aluminum column, an organic glass column or a phenolic resin column), and the materials of each sample column 4 are different, and the materials are accurately known for simulating the acoustic characteristics of the existing “known formation”, the acoustic characteristics of the “known formation” are obtained through historical logging records, the inside of the sample column 4 is slidably connected with a transmitter 6, the outer surface of the transmitter 6 is slidably connected with the inside of the fixed sleeve 2, the inside of the fixed sleeve 2 is provided with a receiver 9, the transmitter 6 and the receiver 9 are acoustic systems of an existing acoustic logging instrument while drilling, and are electrically connected with an external control circuit, the inside of the fixed sleeve 2 is fixedly connected with a fixed column 10, the body of the fixed column 10 is rotatably connected with the outer surface of the rotating rod 8, the outer surface of the fixed column 10 is fixedly connected with a partition plate 11, the partition plate 11, the fixed column 10, the fixed sleeve 2 and the rotating plate 3 are made of materials with compression resistance, wear resistance, high temperature resistance, good sealing performance and signal isolation effect, for example, a double-layer metal shielding plate with an inner copper layer and an outer stainless steel layer, and the surface of the shielding plate is sprayed with a graphene coating, which has shielding effect at 200℃ and 100MPa, so as to adapt to the simulated high temperature and high pressure downhole environment, thereby avoiding the problem of mutual interference of multiple groups of detection, improving the testing efficiency and the accuracy of the test structure, the partition plate 11 is provided with a mounting plate for mounting and fixing the receiver 9, the outer surface of the partition plate 11 is fixedly connected with the inside of the fixed sleeve 2, and the outer surface of the partition plate 11 is fixedly connected with the outer surface of the receiver 9.

[0024] In the embodiment, the side of the rotating plate 3 with the groove 12 is attached to the open side of the fixed sleeve 2, and the rotating plate 3 is fixed by the fixed structure inside the central groove 12 through the end of the rotating rod 8. When the sample column 4 moves and is aligned with the transmitter 6, the transmitter 6 enters the inside of the sample column 4 through the hole on the sample column 4 by descending, and then the transmitter 6 transmits the sound wave signal, the sound wave signal is transmitted through the sample column 4, and the receiver 9 receives the sound wave signal, so that the on-line test can be performed, and the real-time adjustment can be performed according to the test result. After the test is completed, the transmitter 6 moves back to the original position, and then the rotating rod 8 drives the rotating plate 3 to rotate, so that the adjacent sample column 4 is aligned with the transmitter 6, and the above steps are repeated, so that the test of various simulation environments can be performed, and the accuracy of the test result can be further improved through the cooperation of the multiple sample columns 4 and multiple transmitters 6.

[0025] In the embodiment, the linear motor 72 moves along the slide rail 71, the traction rope is supported and the force direction is converted by the fixed pulley 73, so that the transmitter 6 descends by the action, thereby entering the inside of the sample column 4 through the hole on the top of the sample column 4, and when the transmitter 6 descends, the connecting wire is released by the rotation of the winding drum 74 under the action of gravity, so that the transmitter 6 can stably test, and the winding drum 74 rotates to compress the torsional spring 76. When the transmitter 6 is reset after the test is completed, the torsional spring 76 rebounds to reverse the winding drum 74, so as to automatically wind the connecting wire.

[0026] In the embodiment, the linear motor 72 moves along the slide rail 71, the traction rope is supported and the force direction is converted by the fixed pulley 73, so that the transmitter 6 descends by the action, thereby entering the inside of the sample column 4 through the hole on the top of the sample column 4, and when the transmitter 6 descends, the connecting wire is released by the rotation of the winding drum 74 under the action of gravity, so that the transmitter 6 can stably test, and the winding drum 74 rotates to compress the torsional spring 76. When the transmitter 6 is reset after the test is completed, the torsional spring 76 rebounds to reverse the winding drum 74, so as to automatically wind the connecting wire.

[0027] In the embodiment, when the launcher 6 is fixed, the two clamping sleeves 771 are folded outside the one end of the launcher 6, so that the launcher 6 is clamped and fixed through the interference fit of the two clamping sleeves 771, then the screw pipe 775 is screwed outside the two arc strips 774, so that the two clamping sleeves 771 are fixed, then the one end of the traction rope is wound and fixed on the rope ring 776, so that the launcher 6 can be fixed through the clamping sleeve 771, the traction of the launcher 6 by the traction rope is improved, and the launcher 6 is convenient to disassemble and assemble.

[0028] In the embodiment, when the launcher 6 is fixed, the two clamping sleeves 771 are folded outside the one end of the launcher 6, so that the launcher 6 is clamped and fixed through the interference fit of the two clamping sleeves 771, then the screw pipe 775 is screwed outside the two arc strips 774, so that the two clamping sleeves 771 are fixed, then the one end of the traction rope is wound and fixed on the rope ring 776, so that the launcher 6 can be fixed through the clamping sleeve 771, the traction of the launcher 6 by the traction rope is improved, and the launcher 6 is convenient to disassemble and assemble.

[0029] In this embodiment, when the emitter 6 enters the sample column 4 and is sleeved with the sliding cylinder 54, the liquid pump pumps the liquid coupling agent in the liquid tank 51 into the sample column 4 through the liquid pipe 52. Under the action of the liquid pressure, the coupling agent pushes the sliding cylinder 54 to rise in the sample column 4. When the sliding cylinder 54 rises to the highest position in the sample column 4, the inside of the sample column 4 is isolated and sealed. At the same time, the electromagnetic valve on the liquid pipe 52 is closed, and the liquid pump stops working, so that the coupling agent fills the inside of the sample column 4. Then the test can be carried out. After the test is completed, the electromagnetic valve is opened to make the coupling agent flow back to the inside of the liquid tank 51. Then the sliding cylinder 54 falls by gravity, and the emitter 6 rises by traction force to reset. Thus, the coupling agent on the surface of the emitter 6 can be scraped off by the sliding cylinder 54, so as to avoid waste.

[0030] In this embodiment, when the emitter 6 enters the sample column 4 and is sleeved with the sliding cylinder 54, the liquid pump pumps the liquid coupling agent in the liquid tank 51 into the sample column 4 through the liquid pipe 52. Under the action of the liquid pressure, the coupling agent pushes the sliding cylinder 54 to rise in the sample column 4. When the sliding cylinder 54 rises to the highest position in the sample column 4, the inside of the sample column 4 is isolated and sealed. At the same time, the electromagnetic valve on the liquid pipe 52 is closed, and the liquid pump stops working, so that the coupling agent fills the inside of the sample column 4. Then the test can be carried out. After the test is completed, the electromagnetic valve is opened to make the coupling agent flow back to the inside of the liquid tank 51. Then the sliding cylinder 54 falls by gravity, and the emitter 6 rises by traction force to reset. Thus, the coupling agent on the surface of the emitter 6 can be scraped off by the sliding cylinder 54, so as to avoid waste.

[0031] The contents not described in detail in the specification are all the prior art known by those skilled in the art.

[0032] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A testing device for a logging-while-drilling (LWD) instrument, comprising a base (1), characterized in that: The testing mechanism includes a fixed sleeve (2), a rotating plate (3) is movably connected to the outer surface of the fixed sleeve (2), and grooves (12) are provided at the center and eccentric part of the rotating plate (3). A rotating rod (8) is fixedly connected inside the groove (12) at the center. One end of the rotating rod (8) is rotatably connected to the body of the fixed sleeve (2) and extends to the outside of the fixed sleeve (2). A hollow sample column (4) is fixedly connected inside the groove (12) at the eccentric part. A transmitter (6) is slidably connected inside the sample column (4). The outer surface of the transmitter (6) is slidably connected to the inside of the fixed sleeve (2). A receiver (9) is provided inside the fixed sleeve (2). The traction assembly (7) is located inside the fixed sleeve (2) and drives the transmitter (6) to move up and down through traction. An auxiliary component (5) is disposed inside the groove (12) to control the coupling agent to enter the sample column (4) during testing to simulate the test environment.

2. The testing device for a logging-while-drilling acoustic instrument according to claim 1, characterized in that: The fixed sleeve (2) is fixedly connected to the inside of the fixed column (10). The body of the fixed column (10) is rotatably connected to the outer surface of the rotating rod (8). The outer surface of the fixed column (10) is fixedly connected to the partition plate (11). The outer surface of the partition plate (11) is fixedly connected to the inside of the fixed sleeve (2). The outer surface of the partition plate (11) is fixedly connected to the outer surface of the receiver (9).

3. The testing device for a logging-while-drilling acoustic instrument according to claim 2, characterized in that: The traction assembly (7) includes a slide rail (71), the outer surface of which is fixedly connected to the outer surface of the partition (11), a linear motor (72) is slidably connected to the outer surface of the slide rail (71), a traction rope is fixedly connected to the outer surface of the linear motor (72), a fixed pulley (73) is drivenly connected to the outer surface of the traction rope, and the outer surface of the fixed pulley (73) is fixedly connected to the outer surface of the partition (11).

4. The testing device for a logging-while-drilling acoustic instrument according to claim 3, characterized in that: A drum (74) is provided on the outside of the slide rail (71). The body of the drum (74) is rotatably connected to a support rod (75). Both ends of the support rod (75) are fixedly connected to the outer surface of the partition plate (11).

5. The testing device for a logging-while-drilling acoustic instrument according to claim 4, characterized in that: The support rod (75) is fitted with a torsion spring (76), and the two ends of the torsion spring (76) are fixedly connected to the outer surfaces of the partition (11) and the drum (74), respectively.

6. The testing device for a logging-while-drilling acoustic instrument according to claim 3, characterized in that: The traction rope is provided with a connecting unit (77) on the outside. The connecting unit (77) includes two sleeves (771). The outer surfaces of the two sleeves (771) are in contact with each other. The inner surfaces of the two sleeves (771) are fixedly connected with film (772). The outer surfaces of the two film (772) are movably connected to one end of the transmitter (6).

7. The testing device for a logging-while-drilling acoustic instrument according to claim 6, characterized in that: Both of the jackets (771) have wire holes (773) on their outer surfaces, and the inside of the wire holes (773) is connected to the inside of the jackets (771).

8. The testing device for a logging-while-drilling acoustic instrument according to claim 6, characterized in that: Both of the jackets (771) have an arc strip (774) fixedly connected to their outer surfaces. The outer surfaces of the two arc strips (774) are in contact with each other. The outer threads of the arc strips (774) are connected to a screw tube (775). One end of the screw tube (775) is fixedly connected to a rope ring (776). One end of the traction rope is wound and connected to the outer surface of the rope ring (776).

9. The testing device for a logging-while-drilling acoustic instrument according to claim 1, characterized in that: The auxiliary component (5) includes a liquid tank (51), the outer surface of which is fixedly connected to the inside of the groove (12), and a liquid pipe (52) is connected through the inside of the liquid tank (51), one end of which is connected through the inside of the sample column (4).

10. A testing device for a logging-while-drilling acoustic instrument according to claim 9, characterized in that: One end of the liquid tube (52) is provided with a stop bar (53). The outer surface of the stop bar (53) is fixedly connected to the inside of the sample column (4). The outer surface of the stop bar (53) is movably connected to a slide cylinder (54). The outer surface of the slide cylinder (54) is slidably connected to the inside of the sample column (4). The inside of the slide cylinder (54) is slidably connected to the outer surface of the transmitter (6).

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