Single-port oil injection device for mud pulse generator and use method thereof

Abstract

The invention discloses a single-port oil injection device for a mud pulse generator and a method for using the same. The oil injection device comprises a first oil injection tee, a second oil injection tee, a first oil injection double male head, a second oil injection double male head, a first oil injection switch, a second oil injection switch, a third oil injection switch, a fourth oil injection switch, a first organic glass tube joint, a second organic glass tube joint, an organic glass tube, a transparent pressure-resistant hose, a first oil injection joint, a second oil injection joint, a third oil injection joint, a fourth oil injection joint, a pressure gauge, a pressurizing cylinder, a pressurizing piston, a second oil chamber and a third oil chamber. The single-port oil injection device for a mud pulse generator disclosed by the invention and a method for using the same have a simple structure and are easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of unlimited measurement while drilling, and in particular relates to a single-port oil injection device for a mud pulse generator in the field and a use method thereof. Background Art

[0002] The mud pulse generator is an important part of the measurement while drilling technology (MWD) and logging while drilling technology (LWD). The mud pulse generator modulates the pressure of the drilling fluid several thousand meters underground, and obtains the information of various geological parameters underground through demodulation of ground detection equipment. The commonly used positive pulse mud pulse generator and continuous wave mud pulse generator need to be filled with oil to balance the internal and external pressures, and also play the role of lubricating the internal moving parts. Too many bubbles in the oil chamber will affect the normal operation of the mud pulse generator and cause adverse effects. The existing oil injection devices are designed for the oil chamber to be filled with one oil injection port and one oil discharge port. For some mud pulse generators with only one oil injection port due to structural limitations, or although there are two oil injection ports, they are blocked by a balance piston in the middle to form two oil chambers. In fact, each oil chamber has only one oil injection port, the existing oil injection device is not applicable. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a single-port oil injection device for a mud pulse generator and a use method thereof.

[0004] The present invention adopts the following technical solution:

[0005] A single-port oil injection device for a mud pulse generator, the improvement of which is that the oil injection device comprises a first oil injection tee, a second oil injection tee, a first oil injection double male head, a second oil injection double male head, a first oil injection switch, a second oil injection switch, a third oil injection switch, a fourth oil injection switch, a first organic glass tube joint, a second organic glass tube joint, an organic glass tube, a transparent pressure-resistant hose, a first oil injection joint, a second oil injection joint, a third oil injection joint, a fourth oil injection joint, a pressure gauge, a pressurizing cylinder, a pressurizing piston, a second oil chamber and a third oil chamber; the overall connection relationship of the oil injection device is that the first oil injection tee is connected to the oil injection port of the mud pulse generator through the second oil injection double male head, and the first oil injection tee is connected to the first organic glass tube joint through the first oil injection double male head. The first organic glass cylinder joint is connected, and a third oil chamber is formed between the first organic glass cylinder joint, the second organic glass cylinder joint and the organic glass cylinder. The second organic glass cylinder joint is connected to the vacuum pump through the second oil filling joint. The first oil filling tee is connected to the second oil filling tee through the first oil filling joint, the transparent pressure-resistant hose and the fourth oil filling joint. The second oil filling tee is connected to the oil tank through the third oil filling joint. The pressurizing cylinder is directly connected to the second oil filling tee. There is a pressure gauge on the pressurizing cylinder for monitoring the liquid pressure in the second oil chamber. The pressurizing piston is connected to the pressurizing cylinder through a threaded connection for applying pressure to the liquid in the second oil chamber. The first oil filling switch, the second oil filling switch, the third oil filling switch and the fourth oil filling switch are used to connect or block the corresponding oil circuits.

[0006] A method of use, for the above-mentioned single-port oil injection device for the mud pulse generator, wherein the improvement is that: the second oil injection double male connector is connected to the oil injection port, the second oil injection connector is connected to the vacuum pump, the third oil injection connector is connected to the oil tank, and the pressurizing piston is rotated to make the second oil chamber at the maximum volume. The oil injection process is as follows:

[0007] (1) Close the third oil injection switch, open the first oil injection switch, the second oil injection switch, and the fourth oil injection switch, use a vacuum pump to evacuate, and maintain a certain period of time to obtain a sufficiently high vacuum degree;

[0008] (2) Close the first oil filling switch, open the second oil filling switch, the third oil filling switch, and the fourth oil filling switch, and the oil enters the first oil chamber and the second oil chamber;

[0009] (3) Close the second oil filling switch, open the first oil filling switch, continue to vacuum, and the residual gas in the first oil chamber will gradually be discharged;

[0010] (4) Close the first oil filling switch, and open the second, third, and fourth oil filling switches to allow the oil to enter the first oil chamber;

[0011] (5) Repeat steps (3) and (4), and observe through the colorless transparent plexiglass tube until no bubbles emerge during vacuuming, and then proceed to step (6);

[0012] (6) Close the first oil filling switch and the third oil filling switch, open the second oil filling switch and the fourth oil filling switch, turn the pressurizing piston to apply pressure to the oil in the second oil chamber and the first oil chamber, adjust the position of the piston, and use the pressure gauge to monitor the oil pressure; the pressurizing device consisting of the pressurizing cylinder, the pressurizing piston and the pressure gauge can also be directly installed on the oil filling port of the pulse generator to apply pressure so as to adjust the position of the piston.

[0013] The beneficial effects of the present invention are:

[0014] The single-port oil filling device for a mud pulse generator disclosed in the present invention and the method of using the same have a simple structure and are easy to operate. They can be used to fill oil into a mud pulse generator with only one oil filling port, and can also be used to fill oil into a mud pulse generator with two oil filling ports but separated into two oil chambers by a balancing piston in the middle, so that each oil chamber actually has only one oil filling port. The air in the oil chamber of the mud pulse generator can also be effectively removed, and the oil filling speed is fast. When used in conjunction with a vacuum pump, not only can the single oil filling port be used for oil filling, but also pressure can be applied to the oil through a pressurizing device to adjust the position of the balancing piston in the mud pulse generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the structure of a mud pulse generator;

[0016] Figure 2 It is a structural schematic diagram of a single-port oil injection device for a mud pulse generator of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] Figure 1 It is a structural schematic diagram of one of the mud pulse generators applicable to the present embodiment, in which the motor and reducer of the pulse generator are located in a first oil chamber 9 composed of a transmission shaft 1, a balance piston 2, a piston cylinder 3, a reducer sleeve 4, a motor sleeve 5, an adapter sleeve 7, and a pressure-bearing sealing plug 8, wherein 6 is an oil filling port.

[0019] Embodiment 1, as Figure 2As shown, the present embodiment discloses a single-port oil injection device for a mud pulse generator, the oil injection device comprises a first oil injection tee 10, a second oil injection tee 11, a first oil injection double male connector 12, a second oil injection double male connector 13, a first oil injection switch 14, a second oil injection switch 15, a third oil injection switch 16, a fourth oil injection switch 17, a first organic glass tube joint 18, a second organic glass tube joint 19, an organic glass tube 20, a transparent pressure-resistant hose 21, a first oil injection joint 22, a second oil injection joint 23, a third oil injection joint 24, a fourth oil injection joint 25, a pressure gauge 26, a pressurizing cylinder 27, a pressurizing piston 28, a second oil chamber 29 and a third oil chamber 30; the overall connection relationship of the oil injection device is: the first oil injection tee 10 is connected to the oil injection port 6 of the mud pulse generator through the second oil injection double male connector 13, the first oil injection tee 10 is connected to the first oil injection double male connector 12 through the first oil injection double male connector 19, the second organic glass tube 20, the transparent pressure-resistant hose 21, the first oil injection joint 22, the second oil injection joint 23, the third oil injection joint 24, the fourth oil injection joint 25, the pressure gauge 26, the pressurizing cylinder 27, the pressurizing piston 28, the second oil chamber 29 and the third oil chamber 30; the overall connection relationship of the oil injection device is: the first oil injection tee 10 is connected to the oil injection port 6 of the mud pulse generator through the second oil injection double male connector 13, the first oil injection tee 10 is connected to the first oil injection double male connector 12 through the first oil injection double male connector 19 The first organic glass cylinder joint 18 is connected, and a third oil chamber 30 is formed between the first organic glass cylinder joint 18, the second organic glass cylinder joint 19 and the organic glass cylinder 20. The second organic glass cylinder joint 19 is connected to the vacuum pump through the second oil filling joint 23. The first oil filling tee 10 is connected to the second oil filling tee 11 through the first oil filling joint 22, the transparent pressure-resistant hose 21, and the fourth oil filling joint 25. The second oil filling tee 11 is connected to the oil tank through the third oil filling joint 24. The pressurizing cylinder 27 is directly connected to the second oil filling tee 11. There is a pressure gauge 26 on the pressurizing cylinder 27 for monitoring the liquid pressure in the second oil chamber 29. The pressurizing piston 28 is connected to the pressurizing cylinder 27 by threads, which is used to apply pressure to the liquid in the second oil chamber 29. The first oil filling switch 14, the second oil filling switch 15, the third oil filling switch 16 and the fourth oil filling switch 17 are used to connect or block the corresponding oil circuits.

[0020] This embodiment also discloses a method of use, which is used for the above-mentioned single-port oil injection device for the mud pulse generator: the second oil injection double male connector 13 is connected to the oil injection port 6, the second oil injection connector 23 is connected to the vacuum pump, the third oil injection connector 24 is connected to the oil tank, and the pressurizing piston 28 is rotated to make the second oil chamber 29 at the maximum volume. The oil injection process is as follows:

[0021] (1) Close the third oil filling switch 16, open the first oil filling switch 14, the second oil filling switch 15, and the fourth oil filling switch 17, use a vacuum pump to evacuate, and maintain a certain period of time to obtain a sufficiently high vacuum degree;

[0022] (2) Close the first oil filling switch 14, open the second oil filling switch 15, the third oil filling switch 16, and the fourth oil filling switch 17, and the oil enters the first oil chamber 9 and the second oil chamber 29;

[0023] (3) Close the second oil filling switch 15, open the first oil filling switch 14, continue to evacuate, and the residual gas in the first oil chamber 9 will be gradually discharged;

[0024] (4) Close the first oil filling switch 14, and open the second oil filling switch 15, the third oil filling switch 16, and the fourth oil filling switch 17 to allow the oil to enter the first oil chamber 9;

[0025] (5) Repeat steps (3) and (4), observe through the colorless transparent organic glass tube 20, and proceed to step (6) when almost no bubbles emerge during vacuuming.

[0026] (6) Close the first oil filling switch 14 and the third oil filling switch 16, open the second oil filling switch 15 and the fourth oil filling switch 17, turn the pressurizing piston 28 to apply pressure to the oil in the second oil chamber 29 and the first oil chamber 9, and adjust the position of the piston 2. The pressure gauge is used to monitor the oil pressure to ensure the safety of equipment and personnel; the pressurizing device consisting of the pressurizing cylinder 27, the pressurizing piston and the pressure gauge can also be directly installed on the oil filling port 6 of the pulse generator to apply pressure so as to adjust the position of the piston 2.

Claims

1. A method of use, for a single-port oil filling device for a mud pulse generator, the motor and reducer of the pulse generator are in a first oil chamber composed of a transmission shaft, a balancing piston, a piston cylinder, a reducer sleeve, a motor sleeve, an adapter sleeve, and a pressure-bearing sealing plug, the oil filling device comprises a first oil filling tee, a second oil filling tee, a first oil filling double male head, a second oil filling double male head, a first oil filling switch, a second oil filling switch, a third oil filling switch, a fourth oil filling switch, a first organic glass tube joint, a second organic glass tube joint, an organic glass tube, a transparent pressure-resistant hose, a first oil filling joint, a second oil filling joint, a third oil filling joint, a fourth oil filling joint, a pressure gauge, a pressurizing cylinder, a pressurizing piston, a second oil chamber and a third oil chamber; the overall connection relationship of the oil filling device is that the first oil filling tee is connected to the second oil filling double male head through the second oil filling double male head Connect the oil filling port of the mud pulse generator, the first oil filling tee is connected to the first organic glass cylinder joint through the first oil filling double male head, the third oil chamber is formed between the first organic glass cylinder joint, the second organic glass cylinder joint and the organic glass cylinder, the second organic glass cylinder joint is connected to the vacuum pump through the second oil filling joint, the first oil filling tee is connected to the second oil filling tee through the first oil filling joint, the transparent pressure-resistant hose and the fourth oil filling joint, the second oil filling tee is connected to the oil tank through the third oil filling joint, the pressure cylinder is directly connected to the second oil filling tee, and there is a pressure gauge on the pressure cylinder for monitoring the liquid pressure in the second oil chamber. The pressure piston is connected to the pressure cylinder by a threaded connection, which is used to apply pressure to the liquid in the second oil chamber. The first oil filling switch, the second oil filling switch, the third oil filling switch and the fourth oil filling switch are used to connect or block the corresponding oil circuits. Features: The second oil filling double male connector is connected to the oil filling port, the second oil filling connector is connected to the vacuum pump, the third oil filling connector is connected to the oil tank, and the pressurizing piston is rotated to make the second oil chamber at the maximum volume. The oil filling process is as follows: (1) Close the third oil injection switch, open the first oil injection switch, the second oil injection switch, and the fourth oil injection switch, use a vacuum pump to evacuate, and maintain a certain period of time to obtain a sufficiently high vacuum degree; (2) Close the first oil filling switch, open the second oil filling switch, the third oil filling switch, and the fourth oil filling switch, and the oil enters the first oil chamber and the second oil chamber; (3) Close the second oil filling switch, open the first oil filling switch, continue to vacuum, and the residual gas in the first oil chamber will gradually be discharged; (4) Close the first oil filling switch, and open the second, third, and fourth oil filling switches to allow the oil to enter the first oil chamber; (5) Repeat steps (3) and (4), and observe through the colorless transparent plexiglass tube until no bubbles emerge during vacuuming, and then proceed to step (6); (6) Close the first and third oil filling switches, open the second and fourth oil filling switches, turn the pressurizing piston to apply pressure to the oil in the second and first oil chambers, adjust the position of the balancing piston, and use a pressure gauge to monitor the oil pressure; The pressurizing device consisting of a pressurizing cylinder, a pressurizing piston and a pressure gauge can also be directly installed on the oil filling port of the pulse generator to add pressure so as to adjust the position of the balancing piston.

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