A measurement while drilling probe with flow and pressure measurement function

Abstract

The present invention relates to the technical field of soft coal operation equipment, and specifically to a downhole measurement probe with a flow pressure measurement function, including a pipe body, a turbine flowmeter and a fluid pressure synchronization component, the pipe body can rotate around its axis, the pipe body is connected to the drill pipe, the drill pipe is connected to the rotating shaft of a directional drill, the drill pipe is driven to rotate by the rotating shaft of the directional drill, and then the drill pipe drives the pipe body to rotate, and the fluid is transported from one end of the pipe body to the inside of the pipe body. The present invention is provided with a fluid pressure synchronization component, when the fluid in the pipe body passes through the position where the fluid pressure synchronization component is located, the fluid pressure synchronization component causes the fluid in the pipe body to rotate at the same speed as the pipe body, so that the impeller in the measurement area of ​​the turbine flowmeter is only driven by the fluid force from the axial direction of the pipe body to rotate, so that the turbine flowmeter can accurately measure the flow rate of the fluid in the pipe body, so that the staff can accurately and conveniently control the pumping flow rate of the pump according to the fluid flow rate measured by the turbine flowmeter.

Description

Technical Field

[0001] The invention relates to the technical field of soft coal operation equipment, in particular to a measurement while drilling probe with a flow pressure measurement function. Background Art

[0002] During the directional drilling of soft coal, the drilling fluid (drilling fluid) is ejected into the wellbore through the drill bit connected to the end of the drill pipe, and then returns upward to the ground along the space between the drill pipe and the inner wall of the wellbore and circulates continuously. During the process of the drill pipe conveying the drilling fluid into the wellbore, the flow rate of the fluid needs to be detected and controlled so that the flow rate of the fluid is maintained within a stable and effective range. Therefore, in the prior art, a measurement while drilling probe is usually connected to the drill pipe so that the measurement while drilling probe rotates synchronously with the drill pipe and the drill bit, and the flow rate of the fluid flowing through the measurement while drilling probe is detected by a turbine flowmeter installed inside the measurement while drilling probe.

[0003] However, in actual operations, it was found that there was a flow rate difference between the fluid flow rate measured by the turbine flowmeter and the pumping flow rate of the external flow pump, and the flow rate difference changed positively with the increase in drilling volume. Therefore, the staff did not use the fluid flow rate measured by the turbine flowmeter to accurately and conveniently adjust the pumping flow rate of the external flow pump. Summary of the invention

[0004] After research and analysis, the staff found that the difference between the fluid flow rate measured by the turbine flowmeter and the fluid flow rate pumped into the drill pipe is because there is a speed difference between the drill pipe and the drilling fluid in the drill pipe. The drill pipe and the drilling fluid do not rotate synchronously, which will affect the turbine flowmeter and cause inaccurate flow measurement results. Based on this, it is necessary to provide a measurement while drilling probe with flow pressure measurement function to solve the problem of inaccurate measurement results of the turbine flowmeter.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A measurement while drilling probe with flow and pressure measurement function comprises:

[0007] The tube body can rotate around its axis, and the fluid is transported from one end of the tube body to the inside of the tube body;

[0008] A turbine flowmeter, the turbine flowmeter is arranged in the pipe body;

[0009] A fluid pressure synchronization component is disposed in the pipe body and is used to adjust the speed of the fluid before it flows through the turbine flowmeter so that the fluid and the pipe body have the same speed in the circumferential direction of the pipe body, thereby making the turbine flowmeter driven only by the fluid force from the axial direction of the pipe body;

[0010] The fluid pressure synchronization component includes a plurality of first flow partitions and flow guide tubes, wherein the plurality of first flow partitions are arranged on the inner wall of the tube body at equal intervals in the circumferential direction, the flow guide tube and the tube body are coaxial and located in the tube body, the top of the flow guide tube has a hemispherical tube cover, and the first flow partition is arranged on the flow guide tube on the side away from the tube body, thereby isolating the area where the first flow partition is located into a plurality of sector-shaped areas that are not interconnected in the circumferential direction of the tube body; the measurement while drilling probe with flow pressure measurement function also includes a posture measurement component, the posture measurement component includes a first posture measurement short section, a pressure sensor and a speed sensor, the diameter of the first posture measurement short section is smaller than the inner diameter of the tube body, the first posture measurement short section is coaxially arranged in the tube body and can rotate synchronously with the tube body, the pressure sensor and the speed sensor are arranged inside the first posture measurement short section, the pressure sensor is used to monitor the fluid pressure after passing through the turbine sensor, and the speed sensor is used to monitor the tube body Rotation speed; the posture measurement component also includes a second posture measurement short section and a posture measurement sensor, the second posture measurement short section and the first posture measurement short section can rotate synchronously, and the posture measurement sensor is arranged inside the second posture measurement short section; the measurement while drilling probe with flow pressure measurement function also includes a fluid pressure regulating component, and the fluid pressure regulating component is used to regulate the fluid pressure flowing to the position where the second posture measurement short section is located; the fluid pressure regulating component includes a swing plate, a limit frame and a linear drive member, the swing plate has an elongated shape, a first limit rod is arranged on one side of the length direction of the swing plate, and a second limit rod is arranged on the other side of the length direction of the swing plate, and a first limit arc groove and a second limit arc groove are correspondingly opened on the outer peripheral wall of the second posture measurement short section, the first limit rod is slidably connected in the first limit arc groove, and the second limit rod is slidably connected in the second limit arc groove;

[0011] The limiting frame is provided with a limiting guide groove, the first limiting rod and the second limiting rod both pass through the limiting guide groove, the limiting guide groove comprises a limiting straight groove part and a guiding waist groove part, and the guiding waist groove part has two parts and is respectively and vertically arranged at the two ends of the limiting straight groove part;

[0012] The linear drive member is installed inside the second posture measuring short section, and the telescopic end of the linear drive member is connected to the limit frame, and is used to drive the limit frame to move along the axis direction of the second posture measuring short section;

[0013] The limit frame has an upper limit position, a middle position and a lower limit position;

[0014] When the limiting frame is in the middle position, the first limiting rod and the second limiting rod are both located in the limiting straight groove portion;

[0015] When the limit frame is in the upper limit position, the first limit arc groove and the corresponding guide waist groove part overlap, the first limit rod is in the guide waist groove part, and the second limit rod is in the limit straight groove part;

[0016] When the limit frame is in the upper limit position, the first limit rod is in the limit straight groove part, the second limit arc groove and the corresponding guide waist groove part overlap, and the second limit rod is in the guide waist groove part;

[0017] The first limiting arc groove and the second limiting arc groove are both elastically connected with a pushing piece;

[0018] When the first limit arc groove and the guide waist groove partially overlap, the push member is used to push the first limit rod to move toward the bottom of the guide waist groove, thereby making the swing plate tilt to the axis of the second posture measurement short section;

[0019] When the second limit arc groove and the guide waist groove partially overlap, the push member is used to push the second limit rod to move toward the bottom of the guide waist groove, thereby making the swing plate tilt to the axis of the second posture measurement short section;

[0020] A linear reciprocating driving member is also provided in the tube body, and the linear reciprocating driving member is used to drive the second posture measurement short section to reciprocate along its axis.

[0021] In one embodiment, the fluid pressure synchronization component also includes a guide bevel cone and a guide conical surface. The guide bevel cone is coaxially arranged at the lower part of the guide tube, and the guide conical surface is arranged on the inner wall of the tube body. Both the guide bevel cone and the guide conical surface are used to guide the fluid to flow toward the measuring area of ​​the turbine flowmeter.

[0022] In one embodiment, the linear reciprocating driving member includes a motor connecting frame, a driving motor, a transmission rod, and a transmission hole. The motor connecting frame is arranged on the wall of the tube body, the driving motor is arranged at the center of the motor connecting frame, the output shaft of the driving motor is coaxially connected to the transmission rod, the transmission rod is provided with two spiral guide grooves connected end to end, the transmission hole is provided at the bottom center of the second posture measurement short section, and a transmission protrusion is provided on the hole wall of the transmission hole, and the transmission protrusion is slidably connected in the spiral guide groove.

[0023] In one of the embodiments, the installation space of the pressure sensor, the rotation speed sensor and the attitude measurement sensor is filled with an inert gas, and the pressure of the inert gas is greater than the normal pressure of the fluid flowing in the pipe body.

[0024] In one of the embodiments, the first attitude measurement nipple and the second attitude measurement nipple are connected by threads so that the second attitude measurement nipple and the first attitude measurement nipple can rotate synchronously.

[0025] In one of the embodiments, a sealing end cap is coaxially arranged at one end of the first attitude measurement short section away from the second attitude measurement short section, and the sealing end cap and the central part of the turbine flowmeter are connected by a spline structure.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention is provided with a fluid pressure synchronization component. When the fluid in the pipe body passes through the position where the fluid pressure synchronization component is located, the fluid pressure synchronization component causes the fluid in the pipe body to rotate at the same speed as the pipe body, so that the impeller in the measuring area of ​​the turbine flowmeter is only driven by the fluid force from the axial direction of the pipe body to rotate, so that the turbine flowmeter can accurately measure the flow rate of the fluid in the pipe body, so that the staff can accurately and conveniently control the pumping flow rate of the pump according to the fluid flow rate measured by the turbine flowmeter.

[0028] 2. The present invention is provided with a fluid pressure regulating component. When the fluid pressure in the pipe body is not equal to the normal pressure, the pressure in the pipe body can be adjusted by the fluid pressure regulating component so that the pressure of the fluid delivered to the bottom of the well reaches a normal value, thereby preventing damage to the inner wall of the wellbore due to excessive changes in fluid pressure.

[0029] 3. The present invention reduces the risk of short circuit caused by water ingress into the electronic components by filling the installation space of the electronic components such as the pressure sensor, the rotation speed sensor and the attitude measurement sensor inside the first attitude measurement short section and the second attitude measurement short section with an inert gas having a pressure greater than the normal fluid pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A half-section schematic diagram of a measurement while drilling probe with flow and pressure measurement function according to the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of the enlarged structure in the middle;

[0032] Figure 3 This is a schematic diagram of the position of a turbine flowmeter in a measurement while drilling probe with flow and pressure measurement function according to the present invention;

[0033] Figure 4 This is an exploded view of a posture measurement component and a fluid pressure adjustment component in a measurement while drilling probe with flow pressure measurement function of the present invention;

[0034] Figure 5 This is a schematic diagram of the installation position of a fluid pressure regulating assembly in a measurement while drilling probe with a flow pressure measurement function according to the present invention;

[0035] Figure 6 It is a cross-sectional view of a posture measurement component and a fluid pressure adjustment component in a measurement while drilling probe with a flow pressure measurement function of the present invention;

[0036] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0037] Figure 8A position diagram of a first limit arc groove and a second limit arc groove in a measurement while drilling probe with a flow pressure measurement function according to the present invention;

[0038] Fig. 9 It is a schematic diagram of the connection between a linear drive member and a limit frame in a measurement while drilling probe with flow pressure measurement function of the present invention;

[0039] Fig.10 This is a schematic diagram of the structure of a swing plate in a measurement while drilling probe with flow pressure measurement function according to the present invention;

[0040] Fig.11 It is a schematic diagram of the matching state of the first limit rod and the second limit rod and the limit guide groove in a measurement while drilling probe with flow pressure measurement function of the present invention;

[0041] Fig.12 It is a schematic diagram of the positions of the first flow cutoff plate and the second flow cutoff plate in a measurement while drilling probe with flow pressure measurement function of the present invention;

[0042] Fig.13 It is a schematic diagram of the cooperation between a turbine flowmeter and a spline structure in a measurement while drilling probe tube with a flow pressure measurement function according to the present invention;

[0043] Fig.14 The present invention is a cross-sectional view of a first attitude measurement short section in a measurement while drilling probe with flow pressure measurement function.

[0044] in:

[0045] 100, pipe body; 200, turbine flowmeter; 300, fluid pressure synchronization assembly; 310, first flow separator; 320, guide tube; 330, hemispherical tube cover; 340, guide oblique cone; 350, guide cone surface; 360, second flow separator; 400, attitude measurement assembly; 410, first attitude measurement short section; 411, linear clamping groove; 420, pressure sensor; 430, speed sensor; 440, second attitude measurement short section; 441, first limit arc groove; 442, second limit arc groove; 443, long slide groove; 450, attitude measurement sensor; 460, seal End cover; 470, spline structure; 500, fluid pressure regulating assembly; 510, swing plate; 520, limit frame; 521, limit guide groove; 5211, limit straight groove portion; 5212, guide waist groove portion; 530, linear drive member; 540, first limit rod; 550, second limit rod; 560, linear reciprocating drive member; 561, motor connecting frame; 562, drive motor; 563, transmission rod; 564, transmission hole; 565, spiral guide groove; 566, transmission protrusion; 570, intermediate column; 580, connecting ring; 590, intermediate connecting side plate. DETAILED DESCRIPTION

[0046] 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 through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] like Figure 1-Figure 14As shown, a measurement while drilling probe with flow and pressure measurement function includes a pipe body 100, a turbine flowmeter 200 and a fluid pressure synchronization component 300. The pipe body 100 can rotate around its axis, and the pipe body 100 is connected to the drill pipe, and the drill pipe is connected to the rotating shaft of the directional drill. The drill pipe is driven to rotate by the rotating shaft of the directional drill, and then the drill pipe drives the pipe body 100 to rotate. The fluid is transported from one end of the pipe body 100 to the inside of the pipe body 100. Specifically, a pump is arranged on the ground, and the drilling fluid is transported into the drill pipe through the delivery end of the pump. The fluid flows forward along the drill pipe and gradually flows into the pipe body 100. The turbine flowmeter 200 is arranged in the pipe body 100. When the fluid flows through the measuring area of ​​the turbine flowmeter 200, the impeller in the measuring area is driven to rotate by the force of the fluid along the axial direction of the pipe body 100, so that the impeller speed of the turbine flowmeter 200 is increased. The fluid pressure synchronization component 300 is used to detect the flow rate of the fluid. The fluid pressure synchronization component 300 is arranged in the pipe body 100. The fluid pressure synchronization component 300 is used to adjust the speed of the fluid flowing through the turbine flowmeter 200, so that the fluid and the pipe body 100 have the same speed in the circumferential direction of the pipe body 100, so that the turbine flowmeter 200 is only driven by the fluid force from the axial direction of the pipe body 100. The fluid pressure synchronization component 300 includes a plurality of first flow partitions 310 and a flow guide tube 320. The plurality of first flow partitions 310 are arranged on the inner wall of the pipe body 100 at equal intervals in the circumferential direction. The flow guide tube 320 is coaxial with the pipe body 100 and is located in the pipe body 100. The top of the flow guide tube 320 has a hemispherical tube cover 330. The side of the first flow partition 310 away from the pipe body 100 is arranged on the flow guide tube 320, and the area where the first flow partition 310 is located is isolated into a plurality of sector-shaped areas that are not connected to each other in the circumferential direction of the pipe body 100.

[0050] During construction, the directional drill and the pump are started, the rotating shaft of the directional drill drives the multiple sections of drill pipe to rotate, the drill pipe drives the pipe body 100 to rotate, and the pipe body 100 drives the drill bit to rotate, thereby drilling into the ground. At the same time, the delivery end of the pump delivers drilling fluid (referred to as fluid) of a specified flow rate into the drill pipe, and the fluid gradually flows forward along the drill pipe into the pipe body 100. Due to the setting of the first flow partition 310, the angle value of the fluid in the pipe body 100 that can rotate relative to the circumferential direction of the pipe body 100 is reduced, and the angle in each sector area is The fluid can only follow the synchronous rotation speed of the first flow partition 310 and the tube body 100, so that the fluid and the tube body 100 have the same speed in the circumferential direction of the tube body 100. Since the turbine flowmeter 200 is arranged on the tube body 100, the fluid has the same speed as the outer shell of the turbine flowmeter 200. At this time, the impeller in the measuring area of ​​the turbine flowmeter 200 is only driven by the fluid force from the axial direction of the tube body 100 to rotate, so that the turbine flowmeter 200 can accurately measure the flow rate of the fluid in the tube body 100.

[0051] It should be noted that the hemispherical cylinder cover 330 is provided to guide the fluid so that the fluid flows around the measuring area of ​​the turbine flowmeter 200 to avoid the fluid from flowing in the opposite direction due to the reaction force, thereby causing the problem of fluid kinetic energy loss.

[0052] In a further embodiment, Figure 2 As shown, the fluid pressure synchronization component 300 also includes a guide bevel cone 340 and a guide conical surface 350. The guide bevel cone 340 is coaxially arranged at the lower part of the guide tube 320, and the guide conical surface 350 is arranged on the inner wall of the tube body 100. The guide bevel cone 340 and the guide conical surface 350 are both used to guide the fluid to flow toward the measuring area of ​​the turbine flowmeter 200.

[0053] The guiding inclined cone 340 and the guiding conical surface 350 are both used to guide the fluid, so that the fluid can flow around to the measuring area of ​​the turbine flowmeter 200 under the guiding action of the guiding inclined cone 340 and the guiding conical surface 350, thereby increasing the flow velocity measurement accuracy of the turbine flowmeter 200.

[0054] In a further embodiment, Figure 2 and Figure 4 As shown, the measurement while drilling probe with flow pressure measurement function also includes a posture measurement component 400, which includes a first posture measurement short section 410, a pressure sensor 420 and a rotation speed sensor 430. The diameter of the first posture measurement short section 410 is smaller than the inner diameter of the pipe body 100. The first posture measurement short section 410 is coaxially arranged in the pipe body 100 and can rotate synchronously with the pipe body 100. The pressure sensor 420 and the rotation speed sensor 430 are arranged inside the first posture measurement short section 410. The pressure sensor 420 is used to monitor the fluid pressure after passing through the turbine sensor, and the rotation speed sensor 430 is used to monitor the rotation speed of the pipe body 100.

[0055] The diameter of the first posture measurement pup section 410 is smaller than the inner diameter of the pipe body 100 so that the fluid can pass through the area where the first posture measurement pup section 410 is located and continue to flow downward along the pipe wall of the pipe body 100. The pressure sensor 420 is used to monitor the fluid pressure flowing to the position where the first posture measurement pup section 410 is located. The speed sensor 430 is electrically connected to the turbine flowmeter 200 and is used to monitor the speed of the turbine flowmeter 200, thereby indirectly monitoring the flow rate of the fluid by monitoring the speed of the turbine flowmeter 200.

[0056] It should also be noted that if Fig.12 and Fig.13As shown, in order to enable the first posture measuring nipple 410 and the tube body 100 to rotate synchronously, specifically, a plurality of linear clamping grooves 411 can be evenly spaced on the peripheral wall of the first posture measuring nipple 410, and the second flow partitioning plates 360 are evenly spaced in the circumferential direction at corresponding positions of the inner peripheral wall of the tube body 100, so that the second flow partitioning plates 360 are slidably connected in the linear clamping grooves 411.

[0057] In a further embodiment, Figure 6 As shown, the attitude measurement assembly 400 also includes a second attitude measurement pup section 440 and an attitude measurement sensor 450. The second attitude measurement pup section 440 and the first attitude measurement pup section 410 can rotate synchronously. Specifically, the first attitude measurement pup section 410 and the second attitude measurement pup section 440 can be connected by threaded cooperation. The attitude measurement sensor 450 is arranged inside the second attitude measurement pup section 440. The attitude measurement sensor 450 is used to monitor the movement attitude of the drill bit and send the monitored signal to the receiving end.

[0058] Directional drilling is usually used in deep wells. As the fluid in the drill pipe flows downward along the drill pipe, the pressure of the fluid will change when it reaches the bottom of the well. If the pressure change is too large, it will cause damage to the inner wall of the wellbore. The pump body is set on the ground and cannot adjust the pressure of the fluid at the bottom of the well in time. To solve this problem, in a further embodiment, Figure 5 As shown, the measurement while drilling probe with flow pressure measurement function also includes a fluid pressure regulating assembly 500, and the fluid pressure regulating assembly 500 is used to adjust the fluid pressure flowing to the position where the second attitude measurement short section 440 is located. Figure 4 and Figure 7As shown, the fluid pressure regulating assembly 500 includes a swing plate 510, a limiting frame 520 and a linear driving member 530. The swing plate 510 is in the shape of an elongated strip. A first limiting rod 540 is provided on one side of the swing plate 510 in the length direction, and a second limiting rod 550 is provided on the other side of the swing plate 510 in the length direction. A first limiting arc groove 441 and a second limiting arc groove 442 are correspondingly provided on the outer peripheral wall of the second attitude measurement short section 440. The first limiting rod 540 is slidably connected in the first limiting arc groove 441, and the second limiting rod 550 is slidably connected in the second limiting arc groove 442. A limiting guide groove 521 is provided on the limiting frame 520. The first limiting rod 540 and the second limiting rod 550 both pass through the limiting guide groove 521. The groove 521 includes a limiting straight groove portion 5211 and a guiding waist groove portion 5212. The guiding waist groove portion 5212 has two ends which are respectively and perpendicularly arranged at the two ends of the limiting straight groove portion 5211. The linear drive component 530 is installed inside the second posture measuring short section 440. The telescopic end of the linear drive component 530 is connected to the limiting frame 520, which is used to drive the limiting frame 520 to move along the axial direction of the second posture measuring short section 440. The linear drive component 530 is a hydraulic cylinder. The limiting frame 520 has an upper limit position, an intermediate position and a lower limit position. When the limiting frame 520 is in the intermediate position, the first limiting rod 540 and the second limiting rod 550 are both located in the limiting straight groove portion 5211. When the limiting frame 520 is in the upper limit position, the first limiting arc The groove 441 overlaps with the corresponding guide waist groove part 5212, the first limiting rod 540 is in the guide waist groove part 5212, and the second limiting rod 550 is in the limiting straight groove part 5211. When the limiting frame 520 is in the upper limit position, the first limiting rod 540 is in the limiting straight groove part 5211, the second limiting arc groove 442 and the corresponding guide waist groove part 5212 overlap, and the second limiting rod 550 is in the guiding waist groove part 5212. The first limiting arc groove 441 and the second limiting arc groove 442 are elastically connected with a pushing piece (not shown in the figure). Specifically, a compression spring (not shown in the figure) is connected between the pushing piece in the first limiting arc groove 441 and the straight groove mouth of the first limiting arc groove 441. The pushing piece in the second limiting arc groove 442 and the first limiting arc groove 442 are elastically connected with a pushing piece (not shown in the figure). A compression spring is also connected between the straight grooves of the two limiting arc grooves 442. When the first limiting arc groove 441 and the guide waist groove part 5212 do not overlap and when the second limiting arc groove 442 and the guide waist groove part 5212 do not overlap, the compression spring is in a maximum compression state. When the first limiting arc groove 441 and the guide waist groove part 5212 overlap, the elastic force of the compression spring is released, and the push piece is used to push the first limiting rod 540 to move toward the groove bottom of the guide waist groove part 5212, thereby making the swing plate 510 tilted to the axis of the second posture measurement short section 440. When the second limiting arc groove 442 and the guide waist groove part 5212 overlap, the spring force of the compression spring is released, and the push piece is used to push the second limiting rod 550 to move toward the groove bottom of the guide waist groove part 5212.Thus, the swing plate 510 is inclined to the axis of the second posture measurement short section 440. A linear reciprocating driving member 560 is also provided in the tube body 100. The linear reciprocating driving member 560 is used to drive the second posture measurement short section 440 to reciprocate along its axis.

[0059] When the fluid pressure is normal and does not need to be adjusted, the linear drive member 530 drives the limit frame 520 to be in the middle position, such as Fig.11 As shown, at this time, the first limiting rod 540 and the second limiting rod 550 are both located in the limiting straight groove portion 5211. At this time, under the limiting action of the limiting straight groove portion 5211, the straight line in the length direction of the swing plate 510 is parallel to the axis of the second posture measurement short section 440. At this time, the fluid continues to flow downward through the swing plate 510, and the swing plate 510 does not affect the pressure of the fluid.

[0060] When the pressure sensor 420 detects that the fluid pressure is abnormal and is lower than the normal value, the fluid pressure regulating assembly 500 is required to pressurize the fluid. Specifically, the linear drive member 530 drives the limit frame 520 to be in the lower limit position. At this time, the first limit rod 540 is still limited in the limit straight groove portion 5211, and the guide waist groove portion 5212 located at the lower part of the limit straight groove portion 5211 coincides with the second limit arc groove 442. Under the push of the push member, the second limit rod 550 moves to the bottom position of the circular arc groove of the second limit arc groove 442. At this time, the lower end of the limit frame 520 is tilted, and the linear reciprocating drive member 560 is started. The linear reciprocating drive member 560 drives the second posture measurement short section 440 to reciprocate up and down along its axis. When the second posture measurement short section 440 moves upward Under the action of fluid pressure, the second limiting rod 550 gradually overcomes the spring force and moves away from the bottom of the circular arc groove of the second limiting arc groove 442, and the swing plate 510 gradually rotates from the inclined state to the straight line in its length direction parallel to the axis of the second attitude measurement short section 440. At this time, the swing plate 510 will not affect the fluid pressure; when the second attitude measurement short section 440 moves downward, under the action of water pressure and spring force, the second limiting rod 550 cannot continue to move after moving to the bottom of the circular arc groove of the second limiting arc groove 442, and the swing plate keeps the lower end inclined. At this time, the second attitude measurement short section 440 continues to move downward, and the inclined swing plate 510 will squeeze the fluid below it, so that the fluid below the swing plate 510 is pressurized, so that when the fluid is ejected from the pipe body 100 to the bottom of the well, the fluid pressure reaches normal pressure.

[0061] When the pressure sensor 420 detects that the fluid pressure is abnormal and greater than the normal value, the fluid pressure regulating assembly 500 is required to decompress the fluid. Specifically, the linear drive member 530 drives the limit frame 520 to be in the upper limit position. At this time, the second limit rod 550 is still limited in the limit straight groove portion 5211, and the guide waist groove portion 5212 located at the upper part of the limit straight groove portion 5211 coincides with the first limit arc groove 441. Under the pushing action of the push member, the first limit rod 540 moves to the bottom position of the circular arc groove of the second limit arc groove 442. At this time, the upper end of the limit frame 520 is tilted, and the linear reciprocating motion drive member 560 is started at this time. The linear reciprocating driving member 560 drives the second posture measuring short section 440 to reciprocate up and down along its axis. When the second posture measuring short section 440 moves upward, under the action of water pressure and spring force, the second limiting rod 550 abuts against the bottom of the circular arc groove of the second limiting arc groove 442 and cannot move further. The swing plate 510 keeps the upper end tilted. As the second posture measuring short section 440 continues to move upward, the tilted swing plate 510 will squeeze the fluid above it, pushing the flow above the swing plate 510 to move upward, so that the fluid below the swing plate 510 is decompressed, so that when the fluid is ejected from the pipe body 100 to the bottom of the well, the fluid pressure reaches normal pressure.

[0062] When the second posture measuring short section 440 moves downward, under the action of water pressure, the first limiting rod 540 gradually overcomes the spring force and moves away from the bottom of the arc groove of the first limiting arc groove 441, and the swing plate 510 gradually rotates from the inclined state to the straight line in its length direction which is parallel to the axis of the second posture measuring short section 440. At this time, the swing plate 510 will not affect the fluid pressure.

[0063] It should also be noted that if Figure 8 and Fig. 9 As shown, there are multiple swing plates 510 and they are arranged at equal intervals in the circumferential direction around the axis of the second posture measuring short section 440. In order to enable the linear driving member 530 to drive the multiple swing plates 510 to move synchronously, an intermediate column 570 is coaxially arranged at the telescopic end of the linear driving member 530, and a connecting ring 580 is coaxially arranged at the end of the intermediate column 570 away from the linear driving member 530. The connecting ring 580 is provided with intermediate connecting side plates 590 at equal intervals in the circumferential direction, and the end of the intermediate connecting side plate 590 away from the connecting ring 580 is connected to the limit frame 520. Long sliding grooves 443 are opened at equal intervals in the circumferential direction on the outer peripheral wall of the second posture measuring short section 440, and the intermediate connecting side plate 590 is slidably connected in the long sliding grooves 443.

[0064] In a further embodiment, Figure 4 and Figure 6As shown, the linear reciprocating driving member 560 includes a motor connecting frame 561, a driving motor 562, a transmission rod 563 and a transmission hole 564. The motor connecting frame 561 is arranged on the wall of the tube body 100, and the driving motor 562 is arranged at the center of the motor connecting frame 561. The output shaft of the driving motor 562 is coaxially connected to the transmission rod 563. The transmission rod 563 is provided with two spiral guide grooves 565 connected end to end. The transmission hole 564 is opened at the bottom center of the second posture measurement short section 440. A transmission protrusion 566 is arranged on the hole wall of the transmission hole 564, and the transmission protrusion 566 is slidably connected in the spiral guide groove 565.

[0065] When the linear reciprocating driving member 560 is required to drive the second posture measurement short section 440 to move linearly and reciprocatingly, the driving motor 562 is started, and the output shaft of the driving motor 562 drives the transmission rod 563 to rotate synchronously. The second posture measurement short section 440 moves linearly and reciprocatingly under the guidance of the spiral guide groove 565 and the transmission protrusion 566, thereby adjusting the pressure of the fluid flowing through the second posture measurement short section 440.

[0066] It should also be noted that the fluid pressure adjustment speed can be increased by changing the rotation speed of the drive motor 562 during use.

[0067] In a further embodiment, Figure 6 As shown, the installation space of the pressure sensor 420, the rotation speed sensor 430 and the attitude measurement sensor 450 is filled with inert gas, and the pressure of the inert gas is greater than the normal pressure of the fluid flowing in the tube body 100, so that the fluid in the tube body 100 cannot enter into the installation space of electronic components such as the pressure sensor 420, the rotation speed sensor 430 and the attitude measurement sensor 450 through the first attitude measurement short section 410 and the holes and grooves on the pressure sensor 420, thereby preventing electronic components such as the pressure sensor 420, the rotation speed sensor 430 and the attitude measurement sensor 450 from being short-circuited by water.

[0068] It should also be noted that the intermediate column 570 is provided between the telescopic end of the linear drive member 530 and the connecting ring 580 in order to improve the sealing performance through the cooperation between the intermediate column 570 and the corresponding guide hole, thereby reducing the possibility of fluid entering the installation space where the posture measurement sensor 450 is located.

[0069] It should also be noted that if Fig.10 As shown, an extension platform (not numbered) is provided on the swing plate 510 at the position where the first limiting rod 540 and the second limiting rod 550 are provided. Figure 8 The first limiting arc groove 441 and the second limiting arc groove 442 are shielded, so that the fluid is not easy to enter the second posture measurement short section 440 through the first limiting arc groove 441 and the second limiting arc groove 442.

[0070] In a further embodiment, Fig.13 As shown, a sealing end cover 460 is coaxially arranged at one end of the first attitude measuring pawn 410 away from the second attitude measuring pawn 440, and the sealing end cover 460 and the central part of the turbine flowmeter 200 are connected by a spline structure 470, and the spline structure 470 is magnetically attracted to the sealing end cover 460. In order to prevent the fluid from entering the first attitude measuring pawn 410 through the gap between the sealing end cover 460 and the spline structure 470, an extension ring (not numbered in the figure) is coaxially arranged at the end of the spline structure 470 located inside the first attitude measuring pawn 410, so as to provide shielding and reduce the possibility of the fluid entering the first attitude measuring pawn 410.

[0071] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A measurement while drilling probe with flow and pressure measurement function, characterized in that: include: The tube body can rotate around its axis, and the fluid is transported from one end of the tube body to the inside of the tube body; A turbine flowmeter, the turbine flowmeter is arranged in the pipe body; A fluid pressure synchronization component is disposed in the pipe body and is used to adjust the speed of the fluid before it flows through the turbine flowmeter so that the fluid and the pipe body have the same speed in the circumferential direction of the pipe body, thereby making the turbine flowmeter driven only by the fluid force from the axial direction of the pipe body; The fluid pressure synchronization component includes a plurality of first flow partitions and flow guide tubes, wherein the plurality of first flow partitions are arranged on the inner wall of the tube body at equal intervals in the circumferential direction, the flow guide tube and the tube body are coaxial and located in the tube body, the top of the flow guide tube has a hemispherical tube cover, and the first flow partition is arranged on the flow guide tube on the side away from the tube body, thereby isolating the area where the first flow partition is located into a plurality of sector-shaped areas that are not interconnected in the circumferential direction of the tube body; the measurement while drilling probe with flow pressure measurement function also includes a posture measurement component, the posture measurement component includes a first posture measurement short section, a pressure sensor and a speed sensor, the diameter of the first posture measurement short section is smaller than the inner diameter of the tube body, the first posture measurement short section is coaxially arranged in the tube body and can rotate synchronously with the tube body, the pressure sensor and the speed sensor are arranged inside the first posture measurement short section, the pressure sensor is used to monitor the fluid pressure after passing through the turbine sensor, and the speed sensor is used to monitor the tube body Rotation speed; the posture measurement component also includes a second posture measurement short section and a posture measurement sensor, the second posture measurement short section and the first posture measurement short section can rotate synchronously, and the posture measurement sensor is arranged inside the second posture measurement short section; the measurement while drilling probe with flow pressure measurement function also includes a fluid pressure regulating component, and the fluid pressure regulating component is used to regulate the fluid pressure flowing to the position where the second posture measurement short section is located; the fluid pressure regulating component includes a swing plate, a limit frame and a linear drive member, the swing plate has an elongated shape, a first limit rod is arranged on one side of the length direction of the swing plate, and a second limit rod is arranged on the other side of the length direction of the swing plate, and a first limit arc groove and a second limit arc groove are correspondingly opened on the outer peripheral wall of the second posture measurement short section, the first limit rod is slidably connected in the first limit arc groove, and the second limit rod is slidably connected in the second limit arc groove; The limiting frame is provided with a limiting guide groove, the first limiting rod and the second limiting rod both pass through the limiting guide groove, the limiting guide groove comprises a limiting straight groove part and a guiding waist groove part, and the guiding waist groove part has two parts and is respectively and vertically arranged at the two ends of the limiting straight groove part; The linear drive member is installed inside the second posture measuring short section, and the telescopic end of the linear drive member is connected to the limit frame, and is used to drive the limit frame to move along the axis direction of the second posture measuring short section; The limit frame has an upper limit position, a middle position and a lower limit position; When the limiting frame is in the middle position, the first limiting rod and the second limiting rod are both located in the limiting straight groove portion; When the limit frame is in the upper limit position, the first limit arc groove and the corresponding guide waist groove part overlap, the first limit rod is in the guide waist groove part, and the second limit rod is in the limit straight groove part; When the limit frame is in the upper limit position, the first limit rod is in the limit straight groove part, the second limit arc groove and the corresponding guide waist groove part overlap, and the second limit rod is in the guide waist groove part; The first limiting arc groove and the second limiting arc groove are both elastically connected with a pushing piece; When the first limit arc groove and the guide waist groove partially overlap, the push member is used to push the first limit rod to move toward the bottom of the guide waist groove, thereby making the swing plate tilt to the axis of the second posture measurement short section; When the second limit arc groove and the guide waist groove partially overlap, the push member is used to push the second limit rod to move toward the bottom of the guide waist groove, thereby making the swing plate tilt to the axis of the second posture measurement short section; A linear reciprocating driving member is also provided in the tube body, and the linear reciprocating driving member is used to drive the second posture measurement short section to reciprocate along its axis.

2. The measurement while drilling probe with flow and pressure measurement function according to claim 1, characterized in that: The fluid pressure synchronization component also includes a guiding inclined cone and a guiding conical surface. The guiding inclined cone is coaxially arranged at the lower part of the guide tube, and the guiding conical surface is arranged on the inner wall of the tube body. Both the guiding inclined cone and the guiding conical surface are used to guide the fluid to flow toward the measuring area of ​​the turbine flowmeter.

3. The measurement while drilling probe with flow and pressure measurement function according to claim 1, characterized in that: The linear reciprocating driving component includes a motor connecting frame, a driving motor, a transmission rod, and a transmission hole. The motor connecting frame is arranged on the wall of the tube body, the driving motor is arranged at the center of the motor connecting frame, the output shaft of the driving motor is coaxially connected with the transmission rod, the transmission rod is provided with two spiral guide grooves connected end to end, the transmission hole is arranged at the bottom center of the second posture measurement short section, and a transmission protrusion is arranged on the hole wall of the transmission hole, and the transmission protrusion is slidably connected in the spiral guide groove.

4. The measurement while drilling probe with flow and pressure measurement function according to claim 1, characterized in that: The installation space of the pressure sensor, the rotation speed sensor and the attitude measurement sensor is filled with an inert gas, and the pressure of the inert gas is greater than the normal pressure of the fluid flowing in the pipe body.

5. The measurement while drilling probe with flow and pressure measurement function according to claim 1, characterized in that: The first posture measurement nipple and the second posture measurement nipple are connected by threads so that the second posture measurement nipple and the first posture measurement nipple can rotate synchronously.

6. The measurement while drilling probe with flow and pressure measurement function according to claim 1, characterized in that: A sealing end cover is coaxially arranged at one end of the first posture measurement short section away from the second posture measurement short section, and the sealing end cover is connected to the central part of the turbine flowmeter through a spline structure.

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