Downhole bit pressure measuring device and method

Abstract

The invention discloses an underground bit pressure measuring device and method. In the device, a bit pressure measuring device body is vertically arranged; the parameter measuring module is arranged at the bottom end of the bit pressure measuring device body to measure underground bit pressure parameters, and the electromagnetic wireless transmission and emission module emits the underground bit pressure parameters and corrects emission parameters of the electromagnetic wireless transmission and emission module based on second temperature information. The electromagnetic wireless receiving module receives the transmitted underground bit pressure parameter and corrects the receiving parameter of the electromagnetic wireless receiving module based on the second temperature information, and the pair of clamping blocks get close to each other along with the sliding block so as to clamp the vertical bit pressure measuring device body and get away from each other so as to release clamping of the bit pressure measuring device body; the inserting rod is provided with surface threads in threaded connection with the threaded groove. The device ensures that the measuring device is vertically and downwards installed, and meanwhile signal interference caused by the severe drilling environment is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of downhole drilling pressure measurement, and in particular to a downhole drilling pressure measurement device and method. Background Art

[0002] With the continuous deepening of oil and gas resource exploration and development, the drilling environment is becoming increasingly harsh, the formation structure is becoming more and more complex, and the problems encountered in the drilling process are becoming increasingly prominent. Operators install downhole measurement equipment behind the drill bit to measure the geological parameters of the formations around the drill bit in real time, so as to identify complex oil and gas layers with industrial mining value and stop the drill bit in the required reservoir in time; at the same time, monitor the drill bit position, drilling trajectory, well inclination, well diameter and vibration parameters to achieve real-time positioning and timely correction.

[0003] During the drilling process, it is necessary to closely monitor the downhole working conditions by monitoring various drilling engineering parameters, so as to take various countermeasures in time to ensure safe, high-quality and fast drilling. The drilling pressure is also one of the important parameters that need to be monitored during the drilling process. At this time, a drilling pressure measuring device is needed. When installing the drilling pressure measuring device, it is necessary to ensure the vertical downward installation trajectory of the measuring device to avoid inaccurate installation position of the measuring device and the poor drilling environment causing the measuring device to not operate well, resulting in inaccurate and easily interfered measured data. Therefore, the present invention provides a downhole drilling pressure measuring device and method that is convenient and stably installed to solve the above problems.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a downhole drilling pressure measuring device and method, which is convenient and stable to place, ensures the vertical downward installation of the measuring device while avoiding signal interference caused by the harsh drilling environment, improves the measurement accuracy and integrity, and enhances the reliability of the device.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A downhole drilling pressure measuring device of the present invention comprises:

[0008] The body of the bit pressure measuring device is arranged vertically;

[0009] A parameter measurement module is provided at the bottom of the drilling pressure measurement device body to measure downhole drilling pressure parameters.

[0010] A second temperature correction module is connected to the parameter measurement module to measure second temperature information,

[0011] an electromagnetic wireless transmission transmitting module, which is integrated on one side of the second temperature correction module, and transmits the downhole drilling pressure parameter and corrects the transmission parameter of the electromagnetic wireless transmission transmitting module based on the second temperature information;

[0012] A first temperature correction module is provided at the top of the main body of the bit pressure measuring device to measure first temperature information.

[0013] an electromagnetic wireless receiving module, which is integrated on one side of the first temperature correction module, and receives the transmitted downhole drilling pressure parameter and corrects the receiving parameter of the electromagnetic wireless receiving module based on the second temperature information;

[0014] A guide block, which is provided with a guide passage passing through the body of the bit pressure measuring device;

[0015] A convex block is arranged at the front end of the guide block, and bearings are respectively arranged on both sides of the convex block;

[0016] A bidirectional screw connected between two bearings;

[0017] a pair of moving blocks, which are threadedly connected to the bidirectional screw rod so as to move closer to or farther away from each other along the bidirectional screw rod;

[0018] A pair of sliding blocks, each of which is connected to the moving block,

[0019] A pair of clamping blocks, which are respectively arranged at the ends of the sliding block, and the pair of clamping blocks move closer to each other with the sliding block to clamp the vertical body of the bit pressure measuring device and move away from each other to release the clamping of the body of the bit pressure measuring device;

[0020] A plurality of connecting block pairs, which are provided with the bottom of the guide block;

[0021] A plurality of rotating blocks are rotatably arranged between the connecting block pairs, and bolts are passed through the connecting block pairs and the rotating blocks and fixed via nuts.

[0022] A plurality of support rods are provided, wherein the support rods are connected to the rotating block, and a thread groove is provided at the bottom end of the support rods.

[0023] A plurality of plungers are supported underground, and the plungers are provided with surface threads threadedly connected to the thread grooves.

[0024] In the downhole drilling pressure measuring device, the guide block is a horizontal block and the guide channel is a vertical channel.

[0025] In the downhole drilling pressure measuring device, a level gauge for measuring the horizontality of the guide block is provided on the top surface of the guide block.

[0026] In the downhole drilling pressure measuring device, the projection is provided with a moving groove for accommodating the bearing and the bidirectional screw, and one end of the moving block extends out of the moving groove.

[0027] In the downhole drilling pressure measuring device, the sliding block penetrates the guide block, and a sliding connection is formed between the sliding block and the guide block.

[0028] In the downhole drilling pressure measuring device, the sliding block is an inverted L-shaped structure.

[0029] In the downhole pressure-on-bit measurement device, multiple groups of support rods are symmetrically distributed with the pressure-on-bit measurement device body as the center.

[0030] In the downhole drilling pressure measuring device, four groups of support rods are arranged in a ring array at the bottom end of the guide block.

[0031] In the downhole drilling pressure measuring device, the downhole drilling pressure parameters include resistivity, gamma parameter, vibration parameter, drilling pressure and azimuth parameter.

[0032] The measuring method of the downhole drilling pressure measuring device includes:

[0033] Adjust the tightness between the bolt and the nut to make the support rod rotate on the bolt through the rotating block, and then tighten the nut on the bolt to fix the support rod. The rod is inserted into the well after adjusting the length in the thread groove of the support rod through the surface thread, and ensure that the guide block is in a horizontal state;

[0034] The bidirectional screw is screwed so that the moving block on the bidirectional screw drives the sliding block to slide on the guide block, so that the distance between the two clamping blocks changes. After the body of the WOB measuring device vertically passes through the gap between the two clamping blocks, the clamping blocks move closer to each other with the sliding block to clamp the vertical body of the WOB measuring device.

[0035] The second temperature correction module is connected to the parameter measurement module to measure the second temperature information, the parameter measurement module measures the downhole drilling pressure parameter, the electromagnetic wireless transmission transmission module transmits the downhole drilling pressure parameter and corrects the transmission parameter of the electromagnetic wireless transmission transmission module based on the second temperature information, the first temperature correction module measures the first temperature information, the electromagnetic wireless receiving module receives the transmitted downhole drilling pressure parameter and corrects the receiving parameter of the electromagnetic wireless receiving module based on the second temperature information

[0036] In the above technical scheme, the present invention provides a downhole drilling pressure measuring device, which has the following beneficial effects: through the setting of the guide device, by adjusting the distance between the two clamping blocks, the drilling pressure measuring device is allowed to pass through the clamping blocks, thereby limiting the range of motion of the drilling pressure measuring device, allowing the drilling pressure measuring device to stably move vertically downward, thereby ensuring the accuracy of the installation trajectory. By being able to adjust the overall length of the plug rod and the support rod, the operator can adjust the plug rod to a suitable length according to the site of use, and then insert the plug rod into the ground, so that the guide block can be placed horizontally at the upper end of the installation port, thereby increasing the applicability of the measuring device. Through the mutual cooperation of the set temperature correction module, the electromagnetic wireless receiving and transmitting module and the parameter measurement module, the device has wireless transmission function and multi-parameter measurement function, ensuring the stability and continuity of wireless transmission, thereby meeting various measurement needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0038] Figure 1 A schematic front view of a downhole pressure-on-bit measurement device provided by an embodiment of the present invention.

[0039] Figure 2 A schematic diagram of the partial structure of a downhole pressure-on-bit measurement device provided in an embodiment of the present invention.

[0040] Figure 3 A schematic diagram of a partial top-view cross-sectional structure of a guide block of a downhole drilling pressure measurement device provided by an embodiment of the present invention.

[0041] Figure 4 for Figure 1 A schematic diagram of the enlarged structure of a downhole drilling pressure measurement device provided by an embodiment of the present invention.

[0042] Figure 5 A schematic diagram of a partial front cross-sectional structure of a thread groove of a downhole pressure-on-bit measurement device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] See also Figure 1-5 As shown, in one embodiment, a downhole pressure-on-bit measuring device of the present invention comprises:

[0052] The body 1 of the bit pressure measuring device is arranged vertically;

[0053] The parameter measurement module 20 is arranged at the bottom of the drilling pressure measurement device body 1 to measure the drilling pressure parameters downhole.

[0054] The second temperature correction module 21 is connected to the parameter measurement module 20 to measure the second temperature information.

[0055] The electromagnetic wireless transmission transmitting module 22 is integrated on one side of the second temperature correction module 21. The electromagnetic wireless transmission transmitting module 22 transmits the downhole drilling pressure parameter and corrects the transmission parameter of the electromagnetic wireless transmission transmitting module 22 based on the second temperature information.

[0056] The first temperature correction module 18 is disposed at the top of the drilling pressure measurement device body 1 to measure the first temperature information.

[0057] The electromagnetic wireless receiving module 19 is integrated on one side of the first temperature correction module 18. The electromagnetic wireless receiving module 19 receives the transmitted downhole drilling pressure parameter and corrects the receiving parameter of the electromagnetic wireless receiving module 19 based on the second temperature information.

[0058] A guide block 2, which is provided with a guide channel passing through the body 1 of the bit pressure measuring device;

[0059] A convex block 3 is arranged at the front end of the guide block 2, and bearings 4 are respectively arranged on both sides of the convex block 3;

[0060] A bidirectional screw 5 connected between two bearings 4;

[0061] a pair of moving blocks 6, which are threadedly connected to the bidirectional screw rod 5 so as to move closer to or farther away from each other along the bidirectional screw rod 5;

[0062] A pair of sliding blocks 7, which are respectively connected to the moving blocks 6,

[0063] A pair of clamping blocks 8, which are respectively arranged at the ends of the sliding block 7, and the pair of clamping blocks 8 move closer to each other with the sliding block 7 to clamp the vertical drilling pressure measuring device body 1 and move away from each other to release the clamping of the drilling pressure measuring device body 1;

[0064] A plurality of connection blocks 9 pairs, which are provided with the bottom of the guide block 2;

[0065] A plurality of rotating blocks 10 are rotatably disposed between the pair of connecting blocks 9. Bolts 11 penetrate the pair of connecting blocks 9 and the rotating blocks 10 and are fixed via nuts 12.

[0066] A plurality of support rods 13 are provided, wherein the support rods 13 are connected to the rotating block 10, and a thread groove 14 is provided at the bottom end of the support rods 13.

[0067] A plurality of plug rods 16 are supported underground, and each plug rod 16 is provided with surface threads 15 threadedly connected to the thread groove 14 .

[0068] In a preferred embodiment of the downhole drilling pressure measuring device, the guide block 2 is a horizontal block and the guide channel is a vertical channel.

[0069] In a preferred embodiment of the downhole drilling pressure measuring device, a level 17 for measuring the horizontality of the guide block 2 is provided on the top surface of the guide block 2 .

[0070] In a preferred embodiment of the downhole drilling pressure measuring device, the projection 3 is provided with a moving groove for accommodating the bearing 4 and the bidirectional screw 5, and one end of the moving block 6 extends out of the moving groove.

[0071] In a preferred embodiment of the downhole drilling pressure measuring device, the sliding block 7 penetrates into the guide block 2, and a sliding connection is formed between the sliding block 7 and the guide block 2.

[0072] In a preferred embodiment of the downhole bit pressure measuring device, the sliding block 7 is an inverted L-shaped structure.

[0073] In a preferred embodiment of the downhole WOB measuring device, the plurality of groups of support rods 13 are symmetrically distributed around the WOB measuring device body 1 .

[0074] In a preferred embodiment of the downhole pressure-on-bit measurement device, four groups of the support rods 13 are arranged in a circular array at the bottom end of the guide block 2 .

[0075] In a preferred embodiment of the downhole drilling pressure measuring device, the downhole drilling pressure parameters include resistivity, gamma parameters, vibration parameters, drilling pressure and azimuth parameters.

[0076] In one embodiment, the clamping block 8 is a semicircular structure.

[0077] In one embodiment, the transmit parameter includes a transmit frequency and the receive parameter includes a resonant frequency of the receive coil.

[0078] In one embodiment, a downhole drilling pressure measuring device includes a drilling pressure measuring device body 1. During the drilling process, under the action of the drilling pressure torque near the drill bit, the strain gauge attached to the measurement sensitive area of ​​the drilling pressure measuring device body 1 converts the drilling pressure and torque into electrical signals, which are converted into digital signals that can be collected and recorded by the conversion circuit processor through a secondary conversion circuit located inside the guide sleeve assembly. The collected and recorded digital signals then communicate with the while drilling measurement system MWD through the guide sleeve assembly and are transmitted to the ground monitoring system by the MWD.

[0079] In one embodiment, the main technical design parameter requirements of the drilling pressure measuring device body 1 are as follows: size: φ172mm; inner diameter mm: 70; buckle type: 4A11*4A10; measurement error less than 5%; material grade: P550; drilling pressure kN: ±800 / ±8; torque kN.m: ±37.5 / ±0.75; three-axis vibration g: 0~50 / ±1; speed rpm: 0~200 / ±1; internal and external pressure MPa: 0~160 / ±1; annular space temperature ℃: 0~175 / ±1, and the drilling pressure measuring device body 1 can simultaneously measure resistivity, gamma parameters, vibration parameters, drilling pressure and azimuth parameters, and judge in near real time whether the formation where the drill bit is located is an oil layer, a rock layer, a complex oil and gas layer or other geological properties.

[0080] In one embodiment, a guide block 2 is connected through one end of a body 1 of a drilling pressure measuring device, a convex block 3 is connected to the front end surface of the guide block 2, bearings 4 are arranged on the inner and outer surfaces of the convex block 3, a bidirectional screw 5 is connected between the two bearings 4, a moving block 6 is connected through both ends of the bidirectional screw 5, a sliding block 7 is connected to one end surface of the moving block 6, a clamping block 8 is connected to one end surface of the sliding block 7, a connecting block 9 is connected to the bottom surface of the guide block 2, a rotating block 10 is placed inside the connecting block 9, a bolt 11 is connected through one side surface of the connecting block 9 and the rotating block 10, a nut 12 is connected to one end surface of the bolt 11, and a support rod is connected to the bottom surface of the rotating block 10. 13, a thread groove 14 is provided on the bottom surface of the support rod 13, a surface thread 15 is screwed inside the thread groove 14, the surface thread 15 is provided on the outer surface of one end of the insertion rod 16, a level 17 is provided on the top surface of the guide block 2, a first temperature correction module 18 is provided on the top surface of the drilling pressure measuring device body 1, an electromagnetic wireless receiving module 19 is integrated on one side surface of the first temperature correction module 18, a parameter measuring module 20 is connected to the bottom surface of the drilling pressure measuring device body 1, a second temperature correction module 21 is connected to the bottom surface of the parameter measuring module 20, and an electromagnetic wireless transmission transmitting module 22 is integrated on one side surface of the second temperature correction module 21.

[0081] In one embodiment, the moving block 6 and the bidirectional screw 5 are threadedly connected, and one end of the moving block 6 extends out of the moving groove provided on the rear end surface of the protrusion 3. In specific use, when the bidirectional screw 5 rotates in the bearing 4, the position of the moving block 6 on the bidirectional screw 5 can be changed, so that the moving block 6 can move along the moving groove, and the moving block 6 drives the sliding block 7 to slide on the guide block 2, thereby changing the spacing between the two clamping blocks 8, and the positions to which the two clamping blocks 8 are moved will not affect the normal installation of the drilling pressure measurement device body 1. At this time, the drilling pressure measurement device body 1 is allowed to slide through the center position of the guide block 2 to ensure that the drilling pressure measurement device body 1 will slide vertically downward, so that the drilling pressure measurement device body 1 can be stably installed.

[0082] In one embodiment, one end of the sliding block 7 passes through the guide block 2, and a sliding connection is formed between the sliding block 7 and the guide block 2. In specific use, when the moving block 6 moves along the moving groove, the sliding block 7 will slide on the guide block 2 at the same time, thereby changing the position of the clamping block 8, so that the two clamping blocks 8 can be moved to a suitable position through adjustment, so that the clamping block 8 can guide the drilling pressure measurement device body 1 when it is installed. Preferably, the bolt 11 is threadedly connected by passing through the connecting block 9 and the rotating block 10 and the nut 12, and the support rod 13 is rotatably connected with the bolt 11. Four groups of support rods 13 are arranged in a circular array at the bottom end of the guide block 2. In specific use, the tightness between the bolt 11 and the nut 12 is adjusted so that the rotating block 10 can rotate on the bolt 11, or the position of the rotating block 10 is fixed, thereby changing the angle of the support rod 13, so that the support rod 13 can adjust the angle according to the actual use situation, and the support rod 13 can well support the guide block 2 through the insertion rod 16.

[0083] In one embodiment, the insertion rod 16 is threadedly connected with the thread groove 14 provided at the bottom end of the support rod 13 through the surface thread 15. When in use, the insertion rod 16 is screwed into the thread groove 14 through the surface thread 15, so that the insertion rod 16 and the support rod 13 are connected together. By adjusting the length of the insertion rod 16 on the support rod 13, the overall height of the insertion rod 16 and the support rod 13 can be changed, so that the insertion rod 16 can be well inserted into different sites. By observing the specific situation of the level 17, the guide block 2 is adjusted to a horizontal state to ensure that the drilling pressure measurement device body 1 will stably move vertically downward to ensure the accuracy of the installation trajectory.

[0084] The measuring method of the downhole drilling pressure measuring device comprises:

[0085] Adjust the tightness between the bolt 11 and the nut 12 to make the support rod 13 rotate on the bolt 11 through the rotating block 10, and then tighten the nut 12 on the bolt 11 to fix the support rod 13. The insertion rod 16 is inserted into the well after adjusting the length in the thread groove 14 of the support rod 13 through the surface thread 15 to ensure that the guide block 2 is in a horizontal state;

[0086] The bidirectional screw 5 is screwed so that the moving block 6 on the bidirectional screw 5 drives the sliding block 7 to slide on the guide block 2, so that the distance between the two clamping blocks 8 changes. After the body 1 of the WOB measuring device vertically passes through the gap between the two clamping blocks 8, the clamping blocks 8 move closer to each other with the sliding block 7 to clamp the vertical body 1 of the WOB measuring device.

[0087] The second temperature correction module 21 is connected to the parameter measurement module 20 to measure the second temperature information, the parameter measurement module 20 measures the downhole drilling pressure parameter, the electromagnetic wireless transmission transmission module 22 transmits the downhole drilling pressure parameter and corrects the transmission parameters of the electromagnetic wireless transmission transmission module 22 based on the second temperature information, the first temperature correction module 18 measures the first temperature information, the electromagnetic wireless receiving module 19 receives the transmitted downhole drilling pressure parameter and corrects the receiving parameters of the electromagnetic wireless receiving module 19 based on the second temperature information.

[0088] In one embodiment, first adjust the tightness between the bolt 11 and the nut 12, so that the support rod 13 can be rotated on the bolt 11 through the rotating block 10, and the four support rods 13 are adjusted to a suitable angle, and then the nut 12 on the bolt 11 is tightened to fix the position of the support rod 13. At this time, according to the situation of the use site, the insertion rod 16 is adjusted to a suitable length in the thread groove 14 of the support rod 13 through the surface thread 15, and then the insertion rod 16 is inserted into the ground. By observing the situation of the level 17, it is ensured that the position of the guide block 2 is in a horizontal state at the upper end of the installation port, and then the two-way screw 5 is turned to rotate in the bearing 4, so that the moving block 6 on the two-way screw 5 will move along the moving groove, thereby driving the sliding block 7 to slide in the guide block 2, so that the spacing between the two clamping blocks 8 will change, so that the two clamping blocks 8 are moved to a suitable position, and then the drilling pressure measuring device 1 is used to penetrate the two clamping blocks. The gap between the blocks 8 limits the range of movement of the drilling pressure measuring device 1 to prevent the drilling pressure measuring device 1 from swinging around, and continues to slide the drilling pressure measuring device 1 downward to the installation port, so that the drilling pressure measuring device 1 can move vertically downward stably, ensuring the installation trajectory of the drilling pressure measuring device 1, so that the drilling pressure measuring device 1 can be stably placed and installed. After the drilling pressure measuring device 1 is installed and used, the parameter measurement module 20 will measure the data in real time, and transmit the measured data to the electromagnetic wireless receiving module 19 through the electromagnetic wireless transmission transmitting module 22, so that the gamma energy spectrum, well inclination angle, temperature, rotation speed, drilling pressure, torque and other parameters of the formation can be measured. When the working temperature emission changes, the instrument changes the resonant frequency of the electromagnetic wave transmitting and receiving coils and the frequency of the emitted electrical signal through the first temperature correction module 18 and the second temperature correction module 21 to ensure the stability of the electromagnetic wave transmission function.

[0089] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.

[0090] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A downhole drilling pressure measuring device, characterized in that: These include, The body of the bit pressure measuring device is arranged vertically; A parameter measurement module is provided at the bottom of the drilling pressure measurement device body to measure downhole drilling pressure parameters. A second temperature correction module is connected to the parameter measurement module to measure second temperature information, an electromagnetic wireless transmission transmitting module, which is integrated on one side of the second temperature correction module, and transmits the downhole drilling pressure parameter and corrects the transmission parameter of the electromagnetic wireless transmission transmitting module based on the second temperature information; A first temperature correction module is provided at the top of the main body of the bit pressure measuring device to measure first temperature information. an electromagnetic wireless receiving module, which is integrated on one side of the first temperature correction module, and receives the transmitted downhole drilling pressure parameter and corrects the receiving parameter of the electromagnetic wireless receiving module based on the second temperature information; A guide block, which is provided with a guide passage passing through the body of the bit pressure measuring device; A convex block is arranged at the front end of the guide block, and bearings are respectively arranged on both sides of the convex block; A bidirectional screw connected between two bearings; a pair of moving blocks, which are threadedly connected to the bidirectional screw rod so as to move closer to or farther away from each other along the bidirectional screw rod; A pair of sliding blocks, each of which is connected to the moving block. A pair of clamping blocks, which are respectively arranged at the ends of the sliding block, and the pair of clamping blocks move closer to each other with the sliding block to clamp the vertical body of the bit pressure measuring device and move away from each other to release the clamping of the body of the bit pressure measuring device; A plurality of connecting block pairs, which are provided with the bottom of the guide block; A plurality of rotating blocks are rotatably arranged between the connecting block pairs, and bolts are passed through the connecting block pairs and the rotating blocks and fixed via nuts. A plurality of support rods are provided, wherein the support rods are connected to the rotating block, and a thread groove is provided at the bottom end of the support rods. A plurality of plungers are supported underground, and the plungers are provided with surface threads threadedly connected to the thread grooves.

2. A downhole pressure-on-bit measurement device according to claim 1, characterized in that: The guide block is a horizontal block and the guide channel is a vertical channel.

3. A downhole drilling pressure measuring device according to claim 2, characterized in that: A level gauge for measuring the horizontality of the guide block is arranged on the top surface of the guide block.

4. A downhole drilling pressure measuring device according to claim 1, characterized in that: The convex block is provided with a moving groove for accommodating the bearing and the bidirectional screw, and one end of the moving block extends out of the moving groove.

5. A downhole pressure-on-bit measuring device according to claim 1, characterized in that: The sliding block penetrates into the guiding block, and a sliding connection is formed between the sliding block and the guiding block.

6. A downhole pressure-on-bit measuring device according to claim 5, characterized in that: The sliding block is an inverted L-shaped structure.

7. A downhole pressure-on-bit measurement device according to claim 1, characterized in that: The plurality of support rods are symmetrically distributed with the main body of the drilling pressure measuring device as the center.

8. A downhole pressure-on-bit measurement device according to claim 1, characterized in that: The support rods are arranged in four groups in a circular array at the bottom end of the guide block.

9. A downhole drilling pressure measuring device according to claim 1, characterized in that: The downhole drilling pressure parameters include resistivity, gamma parameters, vibration parameters, drilling pressure and azimuth parameters.

10. A measuring method for a downhole pressure-on-bit measuring device according to any one of claims 1 to 9, characterized in that: These include, Adjust the tightness between the bolt and the nut to make the support rod rotate on the bolt through the rotating block, and then tighten the nut on the bolt to fix the support rod. The rod is inserted into the well after adjusting the length in the thread groove of the support rod through the surface thread, and ensure that the guide block is in a horizontal state; The bidirectional screw is screwed so that the moving block on the bidirectional screw drives the sliding block to slide on the guide block, so that the distance between the two clamping blocks changes. After the body of the WOB measuring device vertically passes through the gap between the two clamping blocks, the clamping blocks move closer to each other with the sliding block to clamp the vertical body of the WOB measuring device. The second temperature correction module is connected to the parameter measurement module to measure the second temperature information, the parameter measurement module measures the downhole drilling pressure parameter, the electromagnetic wireless transmission transmission module transmits the downhole drilling pressure parameter and corrects the transmission parameters of the electromagnetic wireless transmission transmission module based on the second temperature information, the first temperature correction module measures the first temperature information, the electromagnetic wireless receiving module receives the transmitted downhole drilling pressure parameter and corrects the receiving parameters of the electromagnetic wireless receiving module based on the second temperature information.

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