A MWD measurement while drilling device

Abstract

The present invention relates to the technical field of oil well drilling, and discloses an MWD measurement while drilling device, including a main body, a pressure sensor is fixedly connected to the left inner wall of the main body, a plurality of circular through holes are opened on the outer surface of the main body, the plurality of circular through holes are arranged in a group of five by five in a circular array with the pressure sensor as the center, two groups of circular through holes are distributed at equal distances, and a plurality of rectangular through holes are opened on the outer surface of the main body. At this time, when the scraper ring slides back and forth, the present invention can reduce the blockage of the mud when it enters the interior of the main body through the circular through holes and the rectangular through holes due to the large particles in the mud, thereby affecting the flow of the mud into the interior of the main body, resulting in the signal of the pressure sensor cannot be generated or transmitted normally, thereby ensuring that the mud pulse signal can be smoothly transmitted to the ground, thereby improving the accuracy and reliability of the measurement data.

Description

Technical Field

[0001] The invention relates to the technical field of oil well drilling, in particular to an MWD measurement while drilling device. Background Art

[0002] MWD refers to the process of measuring certain information near the drill bit and transmitting it to the ground without interrupting normal drilling operations. The types of information include: (1) directional data (well inclination, azimuth, tool face angle); (2) formation characteristics (gamma rays, resistivity logging records); (3) drilling parameters (biting pressure, torque, number of revolutions). The sensor is installed in a special downhole instrument that is an integral part of the lower drilling tool assembly. The downhole instrument has a transmitter that sends signals to the ground through some kind of telemetry channel. The most commonly used telemetry channel is the drilling fluid column in the drill string. However, this type of equipment is easily damaged and is not easy to replace.

[0003] Generally, when an MWD measuring device is measuring, it basically controls the pulser to change the flow rate pressure of the mud entering after the signal is measured by the probe tube, and transmits the signal to the ground for reception and analysis to obtain the measurement data. When measuring downhole, the downhole mud contains many particles of different sizes, which can easily block the MWD device channel when the mud flows in, resulting in the mud pulse signal being difficult to generate or transmit normally, affecting the accuracy of the measurement data and the measurement error. Summary of the invention

[0004] The object of the present invention is to provide a MWD measurement while drilling device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is an MWD measurement while drilling device, comprising a main body, a pressure sensor is fixedly connected to the left inner wall of the main body, a plurality of circular through holes are opened on the outer surface of the main body, the plurality of circular through holes are arranged in a circle array with the pressure sensor as the center, two groups of circular through holes are distributed at equal distances, a plurality of rectangular through holes are opened on the outer surface of the main body, the plurality of rectangular through holes are arranged in a circle array with the pressure sensor as the center, a plurality of limit rods are fixedly connected to the outer surface of the main body, an electromagnetic rod is fixedly connected to the interior of the main body, a movable plate is fixedly connected to the output end of the electromagnetic rod, and further comprising:

[0007] The rotating mechanism includes a rotating paddle rotatably connected to the outer surface of the main body, the left and right sides of the rotating paddle are fixedly connected to a rotating cylinder, the outer surface of the rotating cylinder is provided with a V-shaped ring groove, the side of the rotating paddle close to the limiting rod is rotatably connected to the limiting ring, and the side of the limiting ring away from the rotating paddle is fixedly connected to a plurality of hollow cylinders;

[0008] The sliding mechanism includes a spring rod fixedly connected to the inner wall of the hollow cylinder close to the limiting ring, a plug rod is fixedly connected to the side of the spring rod close to the rotating cylinder, the end of the plug rod away from the spring rod is slidably connected to the inside of the V-shaped ring groove, and a plurality of spring rods are fixedly connected to the ends of the scraper ring away from the limiting ring. The side wall of the scraper ring is provided with a plurality of square through grooves, the interior of the scraper ring is hollow, and the side wall of the scraper ring is provided with a plurality of circular holes, and the square through grooves are connected to the interior of the scraper ring.

[0009] Furthermore, the movable plate is slidably connected to the interior of the main body, and the valve stem is slidably connected to the interior of the main body. A return spring is fixedly connected to the side of the valve stem close to the movable plate, and the end of the return spring away from the valve stem is fixedly connected to the interior of the main body. Several limit rods are symmetrically distributed in groups of three with the valve stem as the center, and a limiting flow ring is fixedly connected to the interior of the main body.

[0010] Furthermore, an auxiliary mechanism is provided on the outer surface of the spring rod, which includes two connecting rods fixedly connected to the outer surface of the spring rod, the two connecting rods are symmetrically distributed with the spring rod as the center, and one end of the connecting rod away from the spring rod is rotatably connected to a rotating wheel.

[0011] Furthermore, an intermediate shaft is fixedly connected between the two rotating wheels, the intermediate shaft and the rotating wheel are eccentrically arranged, the outer surface of the intermediate shaft is rotatably connected with a tooth plate, and one end of the plurality of tooth plates close to the scraper ring is rotatably connected with the scraper ring 2;

[0012] Wherein, the scraper ring 2 is slidably connected to the outer surfaces of a plurality of spring rods.

[0013] Furthermore, a fixing mechanism is provided on the outer surface of the scraper ring, which includes a plurality of C-shaped plates fixedly connected to the side of the limiting ring away from the rotating paddle, one end of the C-shaped plate away from the rotating paddle is fixedly connected to the limiting rod, and the C-shaped plate is slidably connected to the outer surface of the scraper ring.

[0014] Furthermore, a plurality of circular holes are provided on the top of the C-shaped plate, an elastic plate is fixedly connected to the inner wall of the C-shaped plate close to the limiting rod, a square groove is provided on the side wall of the elastic plate, and a connecting hose is fixedly connected to the bottom of the C-shaped plate, and the end of the connecting hose away from the C-shaped plate is connected to the interior of the scraper ring.

[0015] Furthermore, a squeezing mechanism is provided inside the C-shaped plate, and the squeezing mechanism includes a tension spring fixedly connected to the inner wall of the square groove close to the connecting hose, and one end of the tension spring away from the connecting hose is fixedly connected to the C-shaped frame.

[0016] Furthermore, the C-shaped frame is slidably connected to the inside of the square groove, and a second movable plate is fixedly connected to one side of the C-shaped frame close to the connecting hose, and the second movable plate is slidably connected to the top outer wall of the elastic plate.

[0017] The present invention has the following beneficial effects:

[0018] 1. In the present invention, when the mud flows rapidly on the surface of the main body, the high-speed flowing mud will impact the rotating paddle, and the rotating paddle will drive the two rotating cylinders to rotate after being impacted by the mud. When the rotating cylinder rotates, the V-shaped ring groove provided on the surface will make the inserting rod on the spring rod slide back and forth inside the V-shaped ring groove. When the spring rod slides, it will push the scraper ring to slide back and forth. When the square through groove is pushed by the spring rod to slide back and forth on the surface of the main body, the sliding scraper ring will slide back and forth on the surface of multiple circular through holes and rectangular through holes. At the same time, When the rod slides, the sliding of the spring rod will drive the rotating wheel to rotate, and when the rotating wheel rotates, it will drive the scraper ring 2 to slide back and forth through the tooth plate when the spring rod and the scraper ring slide. At this time, when the scraper ring slides back and forth, it can reduce the blockage of mud when it passes through the circular through hole and the rectangular through hole into the interior of the main body due to the large particles in the mud, thereby affecting the flow of mud into the interior of the main body, resulting in the signal of the pressure sensor cannot be generated or transmitted normally, thereby ensuring that the mud pulse signal can be smoothly transmitted to the ground, thereby improving the accuracy and reliability of the measurement data.

[0019] 2. According to the present invention, when the spring rod drives the scraper ring to slide, the sliding of the spring rod will drive the rotating wheel to slide through the connecting rod. When the rotating wheel slides, the friction force with the surface of the main body will cause the rotating wheel to rotate while sliding. When the rotating wheel rotates, it will drive the tooth plate to rotate eccentrically back and forth through the intermediate shaft. When the tooth plate is subjected to the eccentric rotation of the intermediate shaft, it will drive the scraper ring 2 to slide back and forth. When the tooth plate pushes the scraper ring 2 to slide in the direction of the scraper ring, the sliding of the scraper ring 2 can scrape and clean the surface of the main body and the circular through hole and the rectangular through hole again. At the same time, when the scraper ring 2 slides back and forth, the sliding of the scraper ring 2 will also slide the mud inside the mud. At this time, the mud will flush the surface of the scraper ring 2 when the scraper ring 2 slides, and then the flushing of the scraper ring 2 by the mud can reduce the situation where the cleaned impurities are attached to the surface of the scraper ring 2 when the main body surface is slid and cleaned, and reduce the accumulation of impurities on the scraper ring 2 due to the attachment of impurities, thereby reducing the cleaning effect of the scraper ring 2 when it slides.

[0020] 3. In the present invention, when the toothed plate is subjected to the eccentric rotation of the rotating wheel and the intermediate shaft, the toothed plate will slide back and forth while performing the eccentric rotation. When the toothed plate rotates to the upper dead center of the rotating wheel, the teeth on the toothed plate will squeeze the C-shaped frame upward. When the C-shaped frame is squeezed upward by the toothed plate, the C-shaped frame will drive the elastic plate to bend elastically inside the C-shaped plate. At this time, the elastic plate will block the bottom of the C-shaped plate at the bottom of the C-shaped plate. At the same time, when the toothed plate is subjected to the eccentric rotation of the intermediate shaft to slide, the sliding of the toothed plate will drive the C-shaped frame to slide inside the square groove through the teeth. When the C-shaped frame slides, it will drive the movable plate to squeeze the mud between the elastic plate and the C-shaped plate. After being squeezed, the mud will enter into the Inside the scraper ring, when the scraper ring 2 slides back and forth due to the sliding of the tooth plate, the sliding of the scraper ring 2 will squeeze the flowing mud. At this time, the mud squeezed by the scraper ring 2 will enter the scraper ring through the square through groove and enter the scraper ring through the connecting hose. The mud inside the scraper ring will impact the circular through holes and the rectangular through holes through the multiple circular holes on the side wall of the scraper ring, thereby reducing the situation where the mud enters the main body through the circular through holes and the rectangular through holes due to the sliding cleaning of the mud impurities on the circular through holes and the rectangular through holes, and reducing the situation where the mud flow rate entering the main body due to the sliding of the scraper ring is unstable, thereby affecting the flow rate pressure value of the mud entering the main body, causing deviation and instability in the detection signal.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the main body of the present invention;

[0026] Figure 4 It is a schematic diagram of the rotating mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the sliding mechanism of the present invention;

[0028] Figure 6It is a schematic diagram of the fixing mechanism of the present invention;

[0029] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0030] Figure 8 For the present invention Figure 5 Enlarged view of point A in the middle.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] In the figure: 1. main body; 101. pressure sensor; 102. circular through hole; 103. rectangular through hole; 104. limit rod; 105. electromagnetic rod; 106. moving plate; 107. valve stem; 108. limiting ring; 2. rotating mechanism; 201. rotating paddle; 202. rotating cylinder; 203. limit ring; 204. hollow cylinder; 3. sliding mechanism; 301. spring rod; 302. scraper ring; 303. square through groove; 4. auxiliary mechanism; 401. connecting rod; 402. rotating wheel; 403. intermediate shaft; 404. tooth plate; 405. scraper ring II; 5. fixing mechanism; 501. C-shaped plate; 502. connecting hose; 503. elastic plate; 504. square groove; 6. extrusion mechanism; 601. C-shaped frame; 602. moving plate II. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 - Figure 8 As shown, the present invention is an MWD measurement while drilling device, comprising a main body 1, a pressure sensor 101 is fixedly connected to the left inner wall of the main body 1, a plurality of circular through holes 102 are opened on the outer surface of the main body 1, the plurality of circular through holes 102 are arranged in a group of five by five with the pressure sensor 101 as the center circumference array, two groups of circular through holes 102 are distributed at equal distances, a plurality of rectangular through holes 103 are opened on the outer surface of the main body 1, the plurality of rectangular through holes 103 are arranged in a circle with the pressure sensor 101 as the center circumference array, a plurality of limit rods 104 are fixedly connected to the outer surface of the main body 1, an electromagnetic rod 105 is fixedly connected to the interior of the main body 1, and a movable plate 106 is fixedly connected to the output end of the electromagnetic rod 105, and further comprising;

[0035] The rotating mechanism 2 includes a rotating paddle 201 rotatably connected to the outer surface of the main body 1, and the left and right sides of the rotating paddle 201 are fixedly connected to a rotating cylinder 202. The outer surface of the rotating cylinder 202 is provided with a V-shaped ring groove. The side of the rotating paddle 201 close to the limiting rod 104 is rotatably connected to a limiting ring 203, and the side of the limiting ring 203 away from the rotating paddle 201 is fixedly connected to a plurality of hollow cylinders 204;

[0036] The sliding mechanism 3 includes a spring rod 301 fixedly connected to the inner wall of the hollow cylinder 204 near the limiting ring 203, a plug rod fixedly connected to the side of the spring rod 301 near the rotating cylinder 202, and an end of the plug rod away from the spring rod 301 is slidably connected to the inside of the V-shaped ring groove, and a plurality of spring rods 301 are fixedly connected to the ends away from the limiting ring 203 with a scraper ring 302, and a plurality of square through grooves 303 are provided on the side wall of the scraper ring 302, and the interior of the scraper ring 302 is hollow, and a plurality of circular holes are provided on the side wall of the scraper ring 302. 03 is connected to the inside of the scraper ring 302. First, the main body 1 is connected to the pulse signal generator, the stabilizer, the gamma short section, the probe short section and the battery short section respectively, and then the main body 1 is connected to the external cable. Then the connected device is put into the wellbore. Then, when the electromagnetic rod 105 does not receive the signal from the probe, the mud that does not flow at a high speed in the wellbore will enter the main body 1 at the circular through hole 102 between the limiting ring 108 and the valve stem 107 and generate a reverse thrust on the valve stem 107, so that the return spring inside the main body 1 is compressed.

[0037] The movable plate 106 is slidably connected to the interior of the main body 1, and the valve stem 107 is slidably connected to the interior of the main body 1. A return spring is fixedly connected to the side of the valve stem 107 close to the movable plate 106, and the end of the return spring away from the valve stem 107 is fixedly connected to the interior of the main body 1. A number of limit rods 104 are symmetrically distributed in groups of three with the valve stem 107 as the center. The interior of the main body 1 is fixedly connected to a limiting flow ring 108. At this time, the mud will have a larger flow area between the valve stem 107 and the limiting flow ring 108, and the mud pressure value around the pressure sensor 101 is smaller. When the probe sends a signal to the electromagnetic rod 105, the electromagnetic rod 105 drives the movable plate 106 to move in the direction of the electromagnetic rod 105. At this time, the mud will enter the main body 1 through the movable plate 106.

[0038] An auxiliary mechanism 4 is provided on the outer surface of the spring rod 301. The auxiliary mechanism 4 includes two connecting rods 401 fixedly connected to the outer surface of the spring rod 301. The two connecting rods 401 are symmetrically distributed with the spring rod 301 as the center. One end of the connecting rod 401 away from the spring rod 301 is rotatably connected to a rotating wheel 402. At the same time, when the spring rod 301 slides, the sliding of the spring rod 301 will drive the rotating wheel 402 to rotate.

[0039] An intermediate shaft 403 is fixedly connected between the two rotating wheels 402. The intermediate shaft 403 is eccentrically arranged with the rotating wheels 402. A tooth plate 404 is rotatably connected to the outer surface of the intermediate shaft 403. One end of the plurality of tooth plates 404 close to the scraper ring 302 is rotatably connected to a second scraper ring 405.

[0040] Among them, the scraper ring 2 405 is slidably connected to the outer surface of several spring rods 301. When the rotating wheel 402 rotates, it will drive the scraper ring 2 405 to slide back and forth through the tooth plate 404 when the spring rod 301 and the scraper ring 302 slide. At this time, when the scraper ring 302 slides back and forth, it can reduce the blockage of the mud due to the larger particles in the mud when the mud enters the interior of the main body 1 through the circular through hole 102 and the rectangular through hole 103.

[0041] The outer surface of the scraper ring 302 is provided with a fixing mechanism 5, which includes a plurality of C-shaped plates 501 fixedly connected to the side of the limiting ring 203 away from the rotating paddle 201, and one end of the C-shaped plate 501 away from the rotating paddle 201 is fixedly connected to the limiting rod 104, and the C-shaped plate 501 is slidably connected to the outer surface of the scraper ring 302. After being squeezed, the mud will enter the interior of the scraper ring 302 through the connecting hose 502.

[0042] A plurality of circular holes 2 are provided on the top of the C-shaped plate 501, an elastic plate 503 is fixedly connected to the inner wall of one side of the C-shaped plate 501 close to the limiting rod 104, a square groove 504 is provided on the side wall of the elastic plate 503, a connecting hose 502 is fixedly connected to the bottom of the C-shaped plate 501, and one end of the connecting hose 502 away from the C-shaped plate 501 is connected to the interior of the scraper ring 302, and the mud will enter the interior of the scraper ring 302 through the connecting hose 502 after being squeezed, and when the scraper ring 405 slides back and forth due to the sliding of the tooth plate 404, the sliding of the scraper ring 405 will squeeze the flowing mud.

[0043] An extrusion mechanism 6 is provided inside the C-shaped plate 501, and the extrusion mechanism 6 includes a tension spring fixedly connected to the inner wall of the square groove 504 close to the connecting hose 502. The end of the tension spring away from the connecting hose 502 is fixedly connected to the C-shaped frame 601. The teeth on the tooth plate 404 will squeeze the C-shaped frame 601 upward. When the C-shaped frame 601 is squeezed upward by the tooth plate 404, the C-shaped frame 601 will drive the elastic plate 503 to bend elastically inside the C-shaped plate 501.

[0044] The C-shaped frame 601 is slidably connected to the inside of the square groove 504. A movable plate 2 602 is fixedly connected to one side of the C-shaped frame 601 close to the connecting hose 502. The movable plate 2 602 is slidably connected to the top outer wall of the elastic plate 503. The sliding of the tooth plate 404 will drive the C-shaped frame 601 to slide inside the square groove 504 through the teeth. When the C-shaped frame 601 slides, it will drive the movable plate 2 602 to squeeze the mud between the elastic plate 503 and the C-shaped plate 501.

[0045] When in use, first connect the main body 1 to the pulse signal generator, the stabilizer, the gamma short section, the probe short section and the battery short section respectively, then connect the main body 1 to the external cable, and then put the connected device into the wellbore. Then, when the electromagnetic rod 105 does not receive the signal of the probe, the mud that does not flow at a high speed in the wellbore will enter the main body 1 at the circular through hole 102 between the limiting ring 108 and the valve stem 107 and generate a reverse thrust on the valve stem 107, so that the return spring inside the main body 1 is compressed. At this time, the mud will have a larger flow area between the valve stem 107 and the limiting ring 108, and the pressure sensor 101 will be The surrounding mud pressure value is small. When the probe sends a signal to the electromagnetic rod 105, the electromagnetic rod 105 drives the movable plate 106 to move in the direction of the electromagnetic rod 105. At this time, the mud will enter the main body 1 through the movable plate 106. At this time, the pressure inside and outside the main body 1 is balanced, and the compressed return spring is released. At this time, the flow area between the valve stem 107 and the limiting ring 108 is reduced, and then the pressure value of the mud entering the surrounding of the main body 1 increases. At this time, the pressure sensor 101 will transmit the changed signal to the ground for analysis and detection, and then the mud entering the surrounding of the pressure sensor 101 will flow out through the circular through hole 102.

[0046] When the mud flows rapidly on the surface of the main body 1, the high-speed flowing mud will impact the rotating paddle 201. After being impacted by the mud, the rotating paddle 201 will drive the two rotating cylinders 202 to rotate. When the rotating cylinder 202 rotates, the V-shaped ring groove opened on the surface will make the inserted rod on the spring rod 301 slide back and forth inside the V-shaped ring groove. When the spring rod 301 slides, it will push the scraper ring 302 to slide back and forth. When the square through groove 303 is pushed by the spring rod 301 to slide back and forth on the surface of the main body 1, the sliding scraper ring 302 will slide back and forth on the surfaces of the multiple circular through holes 102 and the rectangular through holes 103. At the same time, the spring rod 30 When the spring rod 301 and the scraper ring 302 slide, the sliding of the spring rod 301 will drive the rotating wheel 402 to rotate. When the rotating wheel 402 rotates, it will drive the scraper ring 405 to slide back and forth through the tooth plate 404 when the spring rod 301 and the scraper ring 302 slide. At this time, when the scraper ring 302 slides back and forth, it can reduce the blockage of the mud due to the large particles in the mud when the mud enters the inside of the main body 1 through the circular through hole 102 and the rectangular through hole 103, thereby affecting the flow of the mud into the inside of the main body 1, resulting in the signal of the pressure sensor 101 cannot be generated or transmitted normally, thereby ensuring that the mud pulse signal can be smoothly transmitted to the ground, thereby improving the accuracy and reliability of the measurement data.

[0047] When the spring rod 301 drives the scraper ring 302 to slide, the sliding of the spring rod 301 drives the rotating wheel 402 to slide through the connecting rod 401. When the rotating wheel 402 slides, the friction between the rotating wheel 402 and the surface of the main body 1 causes the rotating wheel 402 to rotate while sliding. When the rotating wheel 402 rotates, it drives the tooth plate 404 to rotate eccentrically back and forth through the intermediate shaft 403. When the tooth plate 404 is subjected to the eccentric rotation of the intermediate shaft 403, it drives the scraper ring 2 405 to slide back and forth. When the tooth plate 404 pushes the scraper ring 2 405 to slide in the direction of the scraper ring 302, the sliding of the scraper ring 2 405 can The surface of the main body 1 and the circular through holes 102 and the rectangular through holes 103 are scraped and cleaned again. At the same time, when the scraper ring 405 slides back and forth, the sliding of the scraper ring 405 will also slide the mud inside the mud. At this time, the mud will flush the surface of the scraper ring 405 when the scraper ring 405 slides, and the flushing of the scraper ring 405 by the mud can reduce the situation where the cleaned impurities are attached to the surface of the scraper ring 405 when the surface of the main body 1 is slid and cleaned, and reduce the accumulation of impurities on the scraper ring 405 due to the adhesion of impurities, which affects the cleaning effect of the scraper ring 405 when it slides.

[0048] When the toothed plate 404 is subjected to the eccentric rotation of the rotating wheel 402 and the intermediate shaft 403, the toothed plate 404 will slide back and forth while performing the eccentric rotation. When the toothed plate 404 rotates to the top dead center of the rotating wheel 402, the teeth on the toothed plate 404 will press the C-shaped frame 601 upward. When the C-shaped frame 601 is pressed upward by the toothed plate 404, the C-shaped frame 601 will drive the elastic plate 503 to bend elastically inside the C-shaped plate 501. The elastic plate 503 will block the bottom of the C-shaped plate 501 at the bottom of the C-shaped plate 501. At the same time, when the tooth plate 404 is eccentrically rotated by the intermediate shaft 403 to slide, the sliding of the tooth plate 404 will drive the C-shaped frame 601 to slide inside the square groove 504 through the teeth. When the C-shaped frame 601 slides, it will drive the moving plate 2 602 to squeeze the mud between the elastic plate 503 and the C-shaped plate 501. After being squeezed, the mud will pass through the connecting soft Tube 502 enters the interior of the scraper ring 302. At the same time, when the scraper ring 405 slides back and forth due to the sliding of the tooth plate 404, the sliding of the scraper ring 405 will squeeze the flowing mud. At this time, the mud squeezed by the scraper ring 405 will enter the scraper ring 302 through the square through groove 303 and enter the scraper ring 302 through the connecting hose 502. The mud inside the scraper ring 302 will impact the circular through hole 102 and the rectangular through hole 103 through the multiple circular holes on the side wall of the scraper ring 302, thereby reducing the impact on the flow of mud when the scraper ring 302 slides and cleans the mud impurities on the circular through hole 102 and the rectangular through hole 103 when the mud enters the interior of the main body 1 through the circular through hole 102 and the rectangular through hole 103, and reducing the instability of the mud flow rate entering the main body 1 due to the sliding of the scraper ring 302, thereby affecting the flow rate pressure value of the mud entering the main body 1, resulting in deviation and instability in the detection signal.

[0049] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An MWD measurement while drilling device, comprising a main body (1), a pressure sensor (101) being fixedly connected to the left inner wall of the main body (1), a plurality of circular through holes (102) being provided on the outer surface of the main body (1), the plurality of circular through holes (102) being arranged in a group of five by five in a circular array with the pressure sensor (101) as the center, two groups of circular through holes (102) being distributed at equal distances, a plurality of rectangular through holes (103) being provided on the outer surface of the main body (1), the plurality of rectangular through holes (103) being arranged in a circular array with the pressure sensor (101) as the center, a plurality of limit rods (104) being fixedly connected to the outer surface of the main body (1), an electromagnetic rod (105) being fixedly connected to the interior of the main body (1), and a movable plate (106) being fixedly connected to the output end of the electromagnetic rod (105), characterized in that: Also includes; A rotating mechanism (2), the rotating mechanism (2) comprising a rotating paddle (201) rotatably connected to the outer surface of the main body (1), the left side and the right side of the rotating paddle (201) being fixedly connected to a rotating cylinder (202), the outer surface of the rotating cylinder (202) being provided with a V-shaped annular groove, the side of the rotating paddle (201) close to the limiting rod (104) being rotatably connected to a limiting ring (203), and the side of the limiting ring (203) away from the rotating paddle (201) being fixedly connected to a plurality of hollow cylinders (204); A sliding mechanism (3), the sliding mechanism (3) comprising a spring rod (301) fixedly connected to the inner wall of a hollow cylinder (204) close to a stop ring (203), a plug rod fixedly connected to the side of the spring rod (301) close to the rotating cylinder (202), an end of the plug rod away from the spring rod (301) being slidably connected to the inside of a V-shaped ring groove, a plurality of spring rods (301) having ends away from the stop ring (203) being fixedly connected to a scraper ring (302), a plurality of square through grooves (303) being provided on the side wall of the scraper ring (302), the interior of the scraper ring (302) being hollow, a plurality of circular holes being provided on the side wall of the scraper ring (302), and the square through grooves (303) being connected to the interior of the scraper ring (302).

2. The MWD measurement while drilling device according to claim 1, characterized in that: The movable plate (106) is slidably connected to the inside of the main body (1), and a valve stem (107) is slidably connected to the inside of the main body (1). A return spring is fixedly connected to the side of the valve stem (107) close to the movable plate (106), and one end of the return spring away from the valve stem (107) is fixedly connected to the inside of the main body (1). A plurality of limit rods (104) are symmetrically distributed in groups of three with the valve stem (107) as the center, and a limiting flow ring (108) is fixedly connected to the inside of the main body (1).

3. The MWD measurement while drilling device according to claim 2, characterized in that: An auxiliary mechanism (4) is provided on the outer surface of the spring rod (301), and the auxiliary mechanism (4) comprises two connecting rods (401) fixedly connected to the outer surface of the spring rod (301), the two connecting rods (401) being symmetrically distributed with the spring rod (301) as the center, and one end of the connecting rod (401) away from the spring rod (301) is rotatably connected to a rotating wheel (402).

4. The MWD measurement while drilling device according to claim 3, characterized in that: An intermediate shaft (403) is fixedly connected between the two rotating wheels (402), the intermediate shaft (403) and the rotating wheel (402) are eccentrically arranged, a tooth plate (404) is rotatably connected to the outer surface of the intermediate shaft (403), and a plurality of tooth plates (404) are rotatably connected to a second scraper ring (405) at one end close to the scraper ring (302); Wherein, the scraper ring 2 (405) is slidably connected to the outer surfaces of a plurality of the spring rods (301).

5. The MWD measurement while drilling device according to claim 4, characterized in that: The outer surface of the scraper ring (302) is provided with a fixing mechanism (5), the fixing mechanism (5) comprising a plurality of C-shaped plates (501) fixedly connected to a side of the limiting ring (203) away from the rotating paddle (201), one end of the C-shaped plate (501) away from the rotating paddle (201) being fixedly connected to the limiting rod (104), and the C-shaped plate (501) being slidably connected to the outer surface of the scraper ring (302).

6. The MWD measurement while drilling device according to claim 5, characterized in that: A plurality of circular holes are provided on the top of the C-shaped plate (501); an elastic plate (503) is fixedly connected to the inner wall of one side of the C-shaped plate (501) close to the limiting rod (104); a square groove (504) is provided on the side wall of the elastic plate (503); a connecting hose (502) is fixedly connected to the bottom of the C-shaped plate (501); an end of the connecting hose (502) away from the C-shaped plate (501) is connected to the interior of the scraper ring (302).

7. The MWD measurement while drilling device according to claim 6, characterized in that: An extrusion mechanism (6) is provided inside the C-shaped plate (501), and the extrusion mechanism (6) comprises a tension spring fixedly connected to the inner wall of the square groove (504) on one side close to the connecting hose (502), and one end of the tension spring away from the connecting hose (502) is fixedly connected to the C-shaped frame (601).

8. The MWD measurement while drilling device according to claim 7, characterized in that: The C-shaped frame (601) is slidably connected to the inside of the square groove (504); a second movable plate (602) is fixedly connected to one side of the C-shaped frame (601) close to the connecting hose (502); and the second movable plate (602) is slidably connected to the top outer wall of the elastic plate (503).

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