While-drilling engineering parameter measurement system for coal mine

Abstract

The invention discloses a coal mine engineering parameter measurement-while-drilling system which comprises an engineering parameter measurement drill collar, a plurality of first measurement hole grooves are symmetrically formed in the periphery of one end of the engineering parameter measurement drill collar, and strain gauges are fixedly arranged in the first measurement hole grooves in a sealed mode; a second measuring hole groove, a third measuring hole groove and a fourth measuring hole groove are formed in the periphery of the other end of the engineering parameter measuring drill collar, an annular pressure sensor is fixedly arranged in the second measuring hole groove in a sealed mode, a drill column internal pressure measuring sensor is arranged in the third measuring hole groove, and a vibration measuring sensor is arranged in the fourth measuring hole groove. A circuit board cabin is formed in the position, located on the right side of the first measuring hole groove, of the upper portion of the engineering parameter measuring drill collar. A circuit board, a temperature measuring module and a rotating speed measuring module are installed in the circuit board cabin in a sealed mode. The while-drilling engineering parameter measurement system for the coal mine is small in overall size, high in integration level, accurate in parameter measurement and very suitable for coal mine drilling.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine drilling, and in particular to a while-drilling engineering parameter measurement system for coal mines. Background Art

[0002] Coal mine drilling is an important technology in the coal mining process, mainly used for geological exploration, shaft and tunnel construction and coal seam mining. The purpose of drilling is to obtain information about underground coal seams through drilling to determine the distribution, thickness and quality of coal.

[0003] When drilling in a coal mine, the drill bit needs to withstand high drilling pressure, high torque, and the pressure of the underground formation and drilling fluid. There will be risks such as damage and breakage, leading to drilling accidents. At the same time, the drilling parameters also directly reflect the construction status of the drilling. The drilling parameters can be used to judge underground abnormal conditions such as well leakage, reduce drilling risks, and improve drilling efficiency.

[0004] In order to measure drilling parameters, various drilling engineering parameter measurement devices are currently available on the market. For example, the patent document with application number 201420357233.2 discloses a downhole engineering parameter measurement system. The system adopts a two-stage structure, consisting of a drill collar body and a communication coil. The communication coil is fixed to the drill collar body through a skeleton. The drill collar body is composed of a torque strain gauge, a pressure sensor, a circuit board, a drilling pressure strain gauge, a receiving short section, etc. Several holes are opened on the drill collar body, and the torque strain gauge, pressure sensor, circuit board, and drilling pressure strain gauge are placed therein. Its structure is as follows: Figure 1 However, the downhole engineering parameter measurement system is mainly used in oil drilling projects. The system adopts a two-stage structure. Fixing the communication coil on the drill collar body through a skeleton will result in a larger overall size. The torque strain gauge, pressure sensor, circuit board, and drilling pressure strain gauge are placed in multiple holes on the drill collar body, which will result in low integration of the entire system and inaccurate data measurement. It cannot adapt to the small size and higher safety requirements (there is gas in coal mine drilling) in coal drilling. Summary of the invention

[0005] To this end, the present application provides a drilling engineering parameter measurement system for coal mines to solve the problems in the prior art that the drilling engineering parameter measurement device is large in size, has low system integration, inaccurate quantity measurement, and cannot be used for coal drilling.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A drilling-while-drilling engineering parameter measurement system for coal mines, comprising an engineering parameter measurement drill collar and two flow guide sleeves, wherein the two flow guide sleeves are fixedly mounted at both ends of the engineering parameter measurement drill collar, and the flow guide sleeves are used to connect a wireless transmission system;

[0008] A plurality of first measuring hole slots are symmetrically provided around one end of the engineering parameter measurement drill collar, and strain gauges are sealed and fixedly provided in the plurality of first measuring hole slots; a second measuring hole slot, a third measuring hole slot and a fourth measuring hole slot are provided around the other end of the engineering parameter measurement drill collar, and an annular pressure sensor is sealed and fixedly provided in the second measuring hole slot, a drill string pressure measurement sensor is provided in the third measuring hole slot, and a vibration measurement sensor is provided in the fourth measuring hole slot;

[0009] A circuit board compartment is provided in the upper part of the engineering parameter measurement drill collar, located on the right side of the first measurement hole groove, in which a circuit board, a temperature measurement module and a rotation speed measurement module are sealed and installed; wherein the strain gauge, the annulus pressure sensor, the drill string pressure measurement sensor, the vibration measurement sensor, the temperature measurement module and the rotation speed measurement module are all electrically connected to the circuit board.

[0010] Preferably, there are four first measuring holes, and the four first measuring holes are evenly distributed at one end of the engineering parameter measuring drill collar at 90° to each other.

[0011] Preferably, the strain gauge is fixedly mounted on the bottom of the first measuring hole.

[0012] Preferably, the circuit board compartment is sealed by means of a rubber seal and an O-ring.

[0013] Preferably, the circuit board compartment is provided with a cover plate, and the cover plate is closed on top of the circuit board compartment. After the cover plate is closed, it is flush with the outer wall of the engineering parameter measurement drill collar.

[0014] Preferably, the second measuring hole slot and the third measuring hole slot are symmetrically arranged, and the fourth measuring hole slot is perpendicular to the second measuring hole slot or the third measuring hole slot.

[0015] Preferably, the rotation speed measurement module adopts a rotation speed sensor.

[0016] Preferably, the two guide sleeves are fixedly connected to two ends of the engineering parameter measurement drill collar through wire holes.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] The present application provides a system for measuring engineering parameters while drilling for coal mines, comprising an engineering parameter measurement drill collar and two guide sleeves, the two guide sleeves being fixedly mounted at both ends of the engineering parameter measurement drill collar, and the guide sleeves being used to connect a wireless transmission system; a plurality of first measurement hole slots are symmetrically provided around one end of the engineering parameter measurement drill collar, and strain gauges are sealed and fixedly arranged in the plurality of first measurement hole slots; a second measurement hole slot, a third measurement hole slot and a fourth measurement hole slot are provided around the other end of the engineering parameter measurement drill collar, an annulus pressure sensor is sealed and fixedly arranged in the second measurement hole slot, a drill string pressure measurement sensor is arranged in the third measurement hole slot, and a vibration measurement sensor is arranged in the fourth measurement hole slot; a circuit board compartment is provided in the upper part of the engineering parameter measurement drill collar, located on the right side of the first measurement hole slot, and a circuit board, a temperature measurement module and a rotation speed measurement module are sealed and installed in the circuit board compartment. The present application provides a downhole engineering parameter measurement system for coal mines, which is suitable for the field of coal drilling. Various sensors are distributed and installed in the holes and grooves around the drill collar, so that the overall size of the drill collar is smaller and the measurement parameters can be guaranteed to be more accurate; the circuit board, temperature measurement module and speed measurement module are all arranged in the circuit board compartment, so that it has a high degree of integration and further reduces the size.

[0019] The circuit board compartment is sealed by glue seal and O-ring to ensure the whole instrument is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0021] Figure 1 It is a schematic diagram of the structure of the existing downhole engineering parameter measurement system;

[0022] Figure 2 A schematic diagram of the structure of a while-drilling engineering parameter measurement system for coal mines provided in this application;

[0023] Figure 3 Schematic diagram of the installation position structure of the strain gauge provided for this application;

[0024] Figure 4 This is a schematic diagram of the installation positions of the annular pressure sensor, drill string pressure measurement sensor and vibration measurement sensor provided in this application.

[0025] Description of reference numerals:

[0026] 1. Engineering parameter measurement drill collar; 101. First measurement hole slot; 102. Strain gauge; 103. Second measurement hole slot; 104. Third measurement hole slot; 105. Fourth measurement hole slot; 106. Circuit board compartment; 107. Circuit board; 108. Temperature measurement module; 109. Speed ​​measurement module; 2. Guide sleeve. DETAILED DESCRIPTION

[0027] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0028] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0029] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0030] See also Figure 2 , Figure 3 and Figure 4 The present application provides a system for measuring engineering parameters while drilling for coal mines, including an engineering parameter measuring drill collar 1 and two guide sleeves 2. The two guide sleeves 2 are fixedly installed at both ends of the engineering parameter measuring drill collar 1, and the guide sleeves 2 are used to connect a wireless transmission system.

[0031] A plurality of first measuring hole slots 101 are symmetrically provided around one end of the engineering parameter measurement drill collar 1, and strain gauges 102 are sealed and fixedly arranged in the plurality of first measuring hole slots 101; a second measuring hole slot 103, a third measuring hole slot 104 and a fourth measuring hole slot 105 are provided around the other end of the engineering parameter measurement drill collar 1, and an annulus pressure sensor is sealed and fixedly arranged in the second measuring hole slot 103, a drill string pressure measurement sensor is arranged in the third measuring hole slot 104, and a vibration measurement sensor is arranged in the fourth measuring hole slot 105.

[0032] The upper part of the engineering parameter measurement drill collar 1 is located on the right side of the first measurement hole groove 101, and a circuit board compartment 106 is opened. A circuit board 107, a temperature measurement module 108 and a speed measurement module 109 are sealed and installed in the circuit board compartment 106; wherein, the strain gauge 102, the annular pressure sensor, the pressure measurement sensor in the drill string, the vibration measurement sensor, the temperature measurement module 108 and the speed measurement module 109 are all electrically connected to the circuit board 107, the strain gauge 102 is used to realize drilling pressure and torque measurement, the annular pressure sensor is used to realize annular pressure measurement, the pressure measurement sensor in the drill string is used to realize pressure measurement in the drill string, the vibration measurement sensor is used to realize vibration measurement, the temperature measurement module 108 uses a temperature sensor to realize temperature measurement, and the speed measurement module 109 uses a speed sensor to realize speed measurement. In this application, the circuit board, the temperature measurement module 108 and the speed measurement module 109 are all arranged in the circuit board compartment 106, so that it has high integration and smaller size.

[0033] In a downhole engineering parameter measurement system for coal mines provided in the present application, four first measurement hole slots 101 are provided, and the four first measurement hole slots 101 are evenly distributed at one end of the engineering parameter measurement drill collar 1 at 90° to each other, which can ensure the strength of the drill collar while making the instrument overall symmetrical and measuring accurately.

[0034] In a downhole engineering parameter measurement system for coal mines provided by the present application, drilling pressure and torque measurement are realized by a strain bridge composed of strain gauges 102. The strain gauges 102 are mounted on the bottom of a first measuring hole groove 101. The first measuring hole grooves 101 are evenly distributed at 90° to each other around an engineering parameter measurement drill collar 1. While eliminating the influence of temperature, the stress condition of the drill collar can be well sensed.

[0035] In a drilling-while-drilling engineering parameter measurement system for coal mines provided by the present application, the circuit board compartment 106 is sealed by a rubber seal and an O-ring, and the seal can ensure the safety of the drill collar underground and the safety of the instrument. The circuit board compartment 106 is provided with a cover plate, which is covered on the circuit board compartment 106. After the cover plate is covered, it is flush with the outer wall of the engineering parameter measurement drill collar 1, which can reduce the diameter of the entire engineering parameter measurement drill collar 1.

[0036] In a downhole engineering parameter measurement system for coal mines provided by the present application, the second measuring hole slot 103 and the third measuring hole slot 104 are symmetrically arranged, and the fourth measuring hole slot 105 is vertically arranged with the second measuring hole slot 103 or the third measuring hole slot 104; the annulus pressure sensor in the second measuring hole slot 103 and the drill string pressure measurement sensor in the third measuring hole slot 104 are in direct contact with the measured fluid, which can make the measurement more accurate; the vibration measurement sensor in the fourth measuring hole slot 105 is directly installed in the hole slot and rigidly connected to the engineering parameter measurement drill collar 1, so that the measured vibration value is more real and accurate, and various sensors are installed in the hole slots on the engineering parameter measurement drill collar 1, so that the overall size of the drill collar is smaller.

[0037] In a drilling engineering parameter measurement system for coal mines provided by the present application, the engineering parameter measurement drill collar 1 and the guide sleeve 2 are connected through a wire hole, and the guide sleeve 2 is used to connect the signal line with the wireless transmission system, so as to facilitate the real-time uploading of the engineering parameters measured by the engineering parameter measurement drill collar 1 to the ground. When installing the guide sleeve 2, the guide sleeve 2 is connected to the wire hole of the engineering parameter measurement drill collar 1 through a positioning pin, and the isolation of the fluid channel and the electrical compartment is achieved through a quadruple sealing ring, thereby ensuring the reliable operation of the instrument. In addition, the engineering parameter measurement drill collar 1 is connected to the wireless transmission system through the guide sleeve 2, and a reliable connection of the instrument system is achieved while ensuring that the instrument flow channel is unobstructed.

[0038] The present application provides a measurement system for coal mine engineering parameters while drilling, which can measure the rotation speed, drilling pressure, torque, vibration, temperature, pressure inside the drill string, annular pressure and other engineering parameters at multiple locations. The system can measure the external force and vibration of the drill collar, and can transmit the data to the ground for decoding through pulse signals, so that the ground personnel can judge whether there is an abnormality through the measured engineering parameters, and then make construction decisions. The whole system has high integration, small size and high safety, and is very suitable for the field of coal drilling technology.

[0039] The present application provides a coal mine drilling engineering parameter measurement system that realizes the measurement of underground drilling parameters and data upload during coal mine drilling, reduces the overall size of the instrument, and eliminates the influence of external factors through the placement of sensors. The system can work under small boreholes and high safety requirements in coal mine drilling, and uses a Wheatstone bridge structure and four-group patch technology to improve measurement sensitivity. The system can be used during the drilling process to achieve real-time measurement of rotation speed, drilling pressure, torque, impact vibration, temperature, pressure inside the drill string, and annular pressure, providing data support for drilling parameter adjustment.

[0040] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A drilling-while-drilling engineering parameter measurement system for coal mines, characterized in that: It includes an engineering parameter measurement drill collar and two flow guide sleeves, the two flow guide sleeves are fixedly installed at both ends of the engineering parameter measurement drill collar, and the flow guide sleeves are used to connect a wireless transmission system; A plurality of first measuring hole slots are symmetrically provided around one end of the engineering parameter measurement drill collar, and strain gauges are sealed and fixedly provided in the plurality of first measuring hole slots; a second measuring hole slot, a third measuring hole slot and a fourth measuring hole slot are provided around the other end of the engineering parameter measurement drill collar, and an annular pressure sensor is sealed and fixedly provided in the second measuring hole slot, a drill string pressure measurement sensor is provided in the third measuring hole slot, and a vibration measurement sensor is provided in the fourth measuring hole slot; A circuit board compartment is provided in the upper part of the engineering parameter measurement drill collar, located on the right side of the first measurement hole groove, in which a circuit board, a temperature measurement module and a rotation speed measurement module are sealed and installed; wherein the strain gauge, the annulus pressure sensor, the drill string pressure measurement sensor, the vibration measurement sensor, the temperature measurement module and the rotation speed measurement module are all electrically connected to the circuit board.

2. The coal mine drilling engineering parameter measurement system according to claim 1, characterized in that: There are four first measuring holes, and the four first measuring holes are evenly distributed at one end of the engineering parameter measuring drill collar at 90 degrees to each other.

3. The drilling-while-drilling engineering parameter measurement system for coal mine according to claim 1, characterized in that: The strain gauge is fixedly mounted on the bottom of the first measuring hole.

4. The coal mine drilling engineering parameter measurement system according to claim 1, characterized in that: The circuit board compartment is sealed by means of a glue seal and an O-ring.

5. The coal mine drilling engineering parameter measurement system according to claim 1, characterized in that: The circuit board compartment is provided with a cover plate, and the cover plate is covered on the circuit board compartment. After the cover plate is covered, it is flush with the outer wall of the engineering parameter measurement drill collar.

6. The coal mine drilling engineering parameter measurement system according to claim 1, characterized in that: The second measuring hole slot and the third measuring hole slot are symmetrically arranged, and the fourth measuring hole slot is perpendicular to the second measuring hole slot or the third measuring hole slot.

7. The coal mine drilling engineering parameter measurement system according to claim 1, characterized in that: The rotation speed measurement module adopts a rotation speed sensor.

8. The coal mine drilling engineering parameter measurement system according to claim 1, characterized in that: The two guide sleeves are fixedly connected to the two ends of the engineering parameter measurement drill collar through the wire holes.

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