Rotary valve mud pulse measurement-while-drilling device

Abstract

The utility model provides a mud pulse measurement-while-drilling device for a rotary valve. The mud pulse measurement-while-drilling device comprises a body, the motor is arranged in one end of the body, and a connecting shaft is fixedly mounted at the output end of the motor; the valve body is fixedly mounted at one end of the outer side surface of the body; and the stator is arranged in the valve body. According to the mud pulse measurement-while-drilling device for the rotary valve, the stator and the rotor are matched with each other, stable and strong pulse signals can be generated when the mud pulse measurement-while-drilling device is used, the transmission efficiency of the mud pulse signals in a mud medium is improved, the overall efficiency of drilling operation is improved, and the drilling efficiency is improved. The signal detectability and the data transmission reliability are enhanced, the system can adapt to complex drilling environments such as high pressure, high temperature and high mud density, and smooth drilling operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of signal generators, in particular to a rotary valve mud pulse measurement-while-drilling device. Background Technique

[0002] With the increasing proportion of directional wells and extended reach wells in oil exploration and development, measurement-while-drilling tools MWD and logging-while-drilling tools LWD are more and more widely used. Whether it is drilling engineering parameters such as well inclination measured by measurement-while-drilling MWD and logging-while-drilling LWD, geological parameters such as formation gamma count and resistivity value, acoustic wave data, or measurement parameters of rotary geosteering tools, etc., all need to be transmitted to the surface system by mud through a pulse signal generator. The surface system collects the waveform of the pulser signal generator through a pressure sensor on the drilling riser, and restores it into downhole engineering parameters and geological parameters in real time after decoding.

[0003] Currently, the widely used mud pulse logging-while-drilling tools mainly have negative pulse, positive pulse and continuous wave transmission modes. However, there are many problems in actual use. The negative pulse generator generates signals at a relatively slow speed, and when working, the solenoid valve pressure switch of the logging-while-drilling tool in the negative pulse has limited high-temperature resistance, and its maximum working temperatures are only 125°C and 150°C respectively; although the continuous wave pulse generator can continuously and efficiently generate signals, its coding method makes it difficult to process and transmit all information in a short time, resulting in a long delay time in the actual transmission process and a long conversion period when the surface system detects information, and the operation is also complex; when the flow rate and density of the drilling fluid are too large or the well depth exceeds 5000 meters, the spring of the solenoid valve pressure switch of the positive pulse generator is prone to failure to reset due to excessive pressure, resulting in the instrument being unable to transmit mud signals.

[0004] Therefore, it is necessary to provide a rotary valve mud pulse measurement-while-drilling device to solve the above technical problems. Content of the Utility Model

[0005] The utility model provides a rotary valve mud pulse measurement-while-drilling device, which solves the problems of slow signal generation speed, limited working temperature range, complex coding method increasing transmission time, and easy damage of components, resulting in inability to transmit signals.

[0006] To solve the above technical problems, a rotary valve mud pulse measurement-while-drilling device provided by the utility model includes:

[0007] A body;

[0008] A motor, the motor is arranged inside one end of the body, and a connecting shaft is fixedly installed at the output end of the motor;

[0009] A valve body, the valve body is fixedly installed at one end of the outer side of the body;

[0010] A stator, which is arranged inside the valve body. The stator includes a positioning member and a plurality of flow grooves;

[0011] A rotor, which is arranged on the inner side surface of the valve body. The rotor includes a shaft body and a plurality of blades.

[0012] Preferably, a plurality of the flow grooves are all formed inside the positioning member, and the positioning member is fixedly installed on the inner side surface of the valve body.

[0013] Preferably, the shaft body is fixedly installed at one end of the connecting shaft, and a plurality of the blades are all arranged on the outer side surface of the shaft body.

[0014] Preferably, the rotor is arranged on one side of the stator.

[0015] Preferably, a fishing spear is fixedly installed at one end of the valve body.

[0016] Preferably, a plurality of grooves are formed at the other end of the shaft body, and a plurality of insertion slots are formed on the outer side surface of the other end of the shaft body. Insertion blocks are arranged on the inner side surfaces of the plurality of insertion slots, and the plurality of insertion blocks are respectively connected to the plurality of blades.

[0017] Preferably, limiting screws are threadedly connected inside the plurality of grooves, positioning holes are formed on one side of the plurality of insertion blocks, and one end of the limiting screw is arranged inside the positioning hole.

[0018] Compared with the related art, a rotary valve mud pulse measurement-while-drilling device provided by the present utility model has the following beneficial effects:

[0019] The present utility model provides a rotary valve mud pulse measurement-while-drilling device. By the mutual cooperation of the stator and the rotor, when in use, a stable and strong pulse signal can be generated, the transmission efficiency of the mud pulse signal in the mud medium is improved, the overall efficiency of the drilling operation is improved, the detectability of the signal and the reliability of data transmission are enhanced, and it can also adapt to complex drilling environments such as high pressure, high temperature and high mud density, ensuring the smooth progress of the drilling operation. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a first embodiment of a rotary valve mud pulse measurement-while-drilling device provided by the present utility model;

[0021] Figure 2 is Figure 1 the schematic structural diagram of the stator shown;

[0022] Figure 3 is Figure 1Schematic diagram of the rotor structure shown

[0023] Figure 4 Schematic diagram of the structure of the second embodiment of a rotary valve mud pulse measurement-while-drilling device provided by the present utility model

[0024] Figure 5 For Figure 4 Schematic diagram of the top view cross-sectional structure of the shaft body shown

[0025] Reference numerals in the figure: 1, body; 2, motor; 21, connecting shaft; 3, valve body; 4, rotor; 41, shaft body; 42, blade; 5, stator; 51, positioning member; 52, flow groove; 6, fishing spear; 7, groove; 71, limit screw; 72, insertion groove; 73, positioning hole; 74, insertion block Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments

[0027] First embodiment

[0028] Please refer to Figure 1 , Figure 2 , Figure 3 , where Figure 1 Schematic diagram of the structure of the first embodiment of a rotary valve mud pulse measurement-while-drilling device provided by the present utility model Figure 2 For Figure 1 Schematic diagram of the stator structure shown Figure 3 For Figure 1 Schematic diagram of the rotor structure shown. A rotary valve mud pulse measurement-while-drilling device includes: body 1

[0029] Motor 2, the motor 2 is arranged inside one end of the body 1, and a connecting shaft 21 is fixedly installed at the output end of the motor 2

[0030] Valve body 3, the valve body 3 is fixedly installed at one end of the outer side of the body 1

[0031] Stator 5, the stator 5 is arranged inside the valve body 4, and the stator 5 includes a positioning member 51 and a plurality of flow grooves 52

[0032] Rotor 4, the rotor 4 is arranged on the inner side of the valve body 3, and the rotor 4 includes a shaft body 41 and a plurality of blades 42

[0033] A plurality of the flow grooves 52 are all opened inside the positioning member 51, and the positioning member 51 is fixedly installed on the inner side of the valve body 3

[0034] The shaft body 41 is fixedly installed at one end of the connecting shaft 21, and a plurality of the blades 42 are all arranged on the outer side surface of the shaft body 41.

[0035] The rotor 4 is arranged on one side of the stator 5.

[0036] A fishing spear 6 is fixedly installed at one end of the valve body 3.

[0037] The shape of the blade 42 is fan-shaped, so that the rising edge and the falling edge of the fan-shaped valve pressure signal are of equal strength, and there is no signal mutation, and the utilization rate of the flow-through area is high.

[0038] When the motor 2 is in use, it drives the rotor 4 to perform periodic forward and reverse rotation movements. When it is blocked and cannot work, the rotor 4 resets to execute the self-check command. During the self-check process, the rotor 4 continuously performs high-frequency actions with small angular displacements, thereby preventing the accumulation of particles.

[0039] The stator adopts an upper-mounted installation method.

[0040] By optimizing the design and control system of the rotary valve, the rotary valve mud pulse system can improve the working efficiency of the whole system while reducing energy consumption, and reduce the cost of drilling operations.

[0041] The rotary valve design can reduce the mechanical wear and fatigue damage of the equipment, extend the service life of the equipment, and reduce the maintenance cost and downtime.

[0042] The working principle of a rotary valve mud pulse measurement-while-drilling device provided by the present utility model is as follows:

[0043] When the positive pulse generator is in the open state, the flow-through area of the flow domain of the valve body assembly reaches the maximum value. As the rotor 4 rotates, the flow-through area gradually decreases, and the upstream drilling fluid is squeezed, and the pressure increases accordingly. When the rotary valve is in the fully closed state, the flow-through area reaches the minimum value, and the upstream pressure is the largest at this time. Similarly, when changing from the fully closed state to the fully open state, due to the rotation of the rotor 4, the flow-through area continuously increases, and the drilling fluid pressure decreases. The rotor 4 continuously performs periodic forward and reverse rotations, so that the drilling fluid pressure signal also changes periodically. The rotor 4 continuously opens and closes the drilling fluid channel, thereby generating a water hammer phenomenon. The pressure switch downstream senses the fluctuation of the water hammer pressure and issues different control signals. These control signals can realize the forward and reverse rotations of the motor 2, thereby feedback controlling the movement of the rotor 4, and further realizing the continuous circulation of the pressure signal and the continuous opening and closing actions of the valve body assembly.

[0044] Compared with the related technology, a rotary valve mud pulse measurement-while-drilling device provided by the present utility model has the following beneficial effects:

[0045] By means of the cooperation between the stator 5 and the rotor, when in use, a stable and strong pulse signal can be generated, improving the transmission efficiency of the mud pulse signal in the mud medium, enhancing the overall efficiency of the drilling operation, strengthening the detectability of the signal and the reliability of data transmission, and being able to adapt to complex drilling environments such as high pressure, high temperature and high mud density, thus ensuring the smooth progress of the drilling operation.

[0046] Second Embodiment

[0047] Please refer to Figure 4 and Figure 5 Based on a rotary valve mud pulse measurement-while-drilling device provided in the first embodiment of the present application, a second embodiment of the present application proposes another rotary valve mud pulse measurement-while-drilling device. The second embodiment is merely a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0048] Specifically, the difference of a rotary valve mud pulse measurement-while-drilling device provided in the second embodiment of the present application is that, for a rotary valve mud pulse measurement-while-drilling device, a plurality of grooves 7 are formed at the other end of the shaft body 41, a plurality of insertion slots 72 are formed on the outer side surface of the other end of the shaft body 41, insertion blocks 74 are arranged on the inner side surfaces of the plurality of insertion slots 72, and the plurality of insertion blocks 74 are respectively connected to the plurality of blades 42.

[0049] Limit screws 71 are threadedly connected inside the plurality of grooves 7, positioning holes 73 are formed on one side of the plurality of insertion blocks 74, and one end of the limit screw 71 is arranged on the inner side surface of the positioning hole 73.

[0050] The working principle of a rotary valve mud pulse measurement-while-drilling device provided by the present utility model is as follows:

[0051] When the blade 42 is damaged, the user can rotate the limit screw 71 installed on the blade 42 to make the limit screw 71 threadedly connected to the inner side surface of the groove 7, so that one end of the limit screw 71 moves out from the inner side surface of the groove 7. Then the user moves the blade 42, so that the insertion block 74 moves out from the inner side surface of the insertion slot 72, thereby replacing the blade 42.

[0052] Compared with the related art, a rotary valve mud pulse measurement-while-drilling device provided by the present utility model has the following beneficial effects:

[0053] Through the cooperation of structures such as the groove 7, the limit screw 71, the insertion slot 72, the positioning hole 73, and the insertion block 74, when in use, the insertion block 74 is inserted into the inner side surface of the insertion slot 72, and then the limit screw 71 is rotated so that one end of the limit screw 71 is on the inner side surface of the positioning hole 73 opened on the insertion block 74, thereby installing the blade 42. In this way, when in subsequent use, if the blade 42 is damaged, it is convenient for the user to replace a single blade 42, thereby reducing the user's cost.

[0054] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A rotary valve mud pulse measurement-while-drilling device, characterized in that, Comprising: Body; A motor, which is arranged inside one end of the body, and a connecting shaft is fixedly installed at the output end of the motor; A valve body, which is fixedly installed at one end of the outer side of the body; A stator, which is arranged inside the valve body, and the stator includes a positioning member and a plurality of flow grooves; A rotor, which is arranged on the inner side of the valve body, and the rotor includes a shaft body and a plurality of blades.

2. The rotary valve mud pulse measurement-while-drilling device according to claim 1, wherein A plurality of the flow grooves are all opened inside the positioning member, and the positioning member is fixedly installed on the inner side of the valve body.

3. A rotary valve mud pulse measurement-while-drilling device according to claim 1, characterized in that, The shaft body is fixedly installed at one end of the connecting shaft, and a plurality of the blades are all arranged on the outer side of the shaft body.

4. A rotary valve mud pulse measurement-while-drilling device according to claim 1, characterized in that, The rotor is arranged on one side of the stator.

5. A rotary valve mud pulse measurement-while-drilling device according to claim 1, characterized in that, A fishing spear is fixedly installed at one end of the valve body.

6. The rotary valve mud pulse measurement-while-drilling device according to claim 1, wherein A plurality of grooves are opened at the other end of the shaft body, a plurality of insertion grooves are opened on the outer side of the other end of the shaft body, and insertion blocks are arranged on the inner sides of the plurality of insertion grooves, and the plurality of insertion blocks are respectively connected to the plurality of blades.

7. The rotary valve mud pulse measurement-while-drilling device according to claim 6, wherein Limit screws are threadedly connected inside the plurality of grooves, positioning holes are opened on one side of the plurality of insertion blocks, and one end of the limit screw is arranged on the inner side of the positioning hole.

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