Device and method for measuring torque and rotating speed of underground turntable of petroleum drilling machine

Abstract

In the device, at least one connecting hole is formed in the back face of a contact type tachometer body, and the connecting hole is provided with a thread A; the speed measuring head is detachably connected with the contact type tachometer body, and the speed measuring head is in contact with the surface of an underground turntable so as to rotate along with the underground turntable; the adjusting mechanism is arranged on the back face of the contact type tachometer body, the fixing block is fixedly connected with one side of the contact type tachometer body, and a mounting cavity is formed in the fixing block. One end of the connecting plate is detachably and vertically inserted into the top of the fixing block to enter the mounting cavity, and the connecting plate is provided with a through threaded hole; the threaded rod penetrates through the connecting plate through the threaded hole in a threaded mode and extends towards the speed measuring head, the connecting block is rotationally connected to the end, close to the speed measuring head, of the threaded rod, and the connecting block is fixedly connected with the sliding block. The friction cleaner is arranged at one end, close to the speed measuring head, of the connecting block so as to contact and clean the speed measuring head or be far away from the speed measuring head through the adjusting threaded rod. The device can clean the surface of the speed measuring head, and is convenient to install and high in precision.

Description

Technical Field

[0001] The present invention relates to the technical field of oil rig operations, and particularly to a device and method for measuring the torque and rotational speed of a downhole rotary table of an oil rig. Background Art

[0002] Downhole rotational speed measurement is to detect the rotational speed of downhole equipment and display the detected data digitally, as an important indicator of the engine speed, to monitor the performance and status of the engine in real time. The equipment used for detection is usually a contact tachometer. During the use of the existing contact tachometer, it is usually necessary to contact the speed measuring head at the top with the surface of the object whose rotational speed needs to be detected to obtain the measurement data. However, since the equipment works downhole for a long time, the surface of the object that the speed measuring head needs to contact may be adhered with stains. After these stains are rotated and come into contact with the speed measuring head, they may adhere to the outer wall of the speed measuring head. The presence of stains will reduce the sensitivity and accuracy of the speed measuring head, resulting in inaccurate contact or detection of the sensor; the stains may also penetrate into the electronic components or sensor interfaces, which may cause short circuits, poor contacts or other failures in the circuit, thus affecting the acquisition and transmission of measurement data. In addition, the rotational speed measurement device of the existing technology includes a base, a sleeve disc and a sensor assembly; the sleeve disc is used to sleeved on the object to be measured, so that the rotation axis of the sleeve disc is coaxial with the rotation axis of the object to be measured; the sensor assembly includes a transmitter and a receiver, the transmitter is connected to the object to be measured, and the rotation axis of the transmitter is coaxial with the rotation axis of the object to be measured, the receiver is connected to the fixing device and faces the transmitter. It can be seen that the existing technology needs to be coaxial with the rotation axis of the object to be measured, which limits the installation of the measurement device in the downhole environment and makes it easy for the transmitter and receiver in the sensor to collide.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] The object of the present invention is to provide a device and method for measuring the torque and rotational speed of a downhole rotary table of an oil rig. The present invention cleans the surface of the speed measuring head, and does not need to be coaxial with the rotation axis of the object to be measured, avoiding the collision between the transmitter and the receiver in the sensor, thereby improving the safety of the sensor and the measurement accuracy of the sensor.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A device for measuring the torque and rotational speed of a downhole rotary table of an oil rig according to the present invention includes:

[0007] A contact tachometer body, at least one connection hole is provided on the back of the contact tachometer body, and a thread A is provided in the connection hole;

[0008] A speed measuring head, which is detachably connected to the contact tachometer body, and the speed measuring head contacts the surface of the downhole rotary table to rotate with the downhole rotary table;

[0009] An adjusting mechanism, which is arranged on the back of the contact tachometer body. The adjusting mechanism includes,

[0010] A rotating plate, which is rotatably connected to the connecting hole to adjust the position of the contact tachometer body relative to the downhole rotary table. The rotating plate is provided with a limiting groove on one side close to the back of the contact tachometer body.

[0011] A limiting disc, which is installed in the limiting groove. The limiting disc is provided with a through hole, and an internal thread is arranged in the through hole.

[0012] A T-shaped rotating column, which is detachably connected to the rotating plate. The T-shaped rotating column includes two sets of thread Bs that are respectively threadedly connected to the thread A and the internal thread. The T-shaped rotating column is sequentially inserted into the through hole and the connecting hole to fix the rotating plate and the contact tachometer body;

[0013] A fixing block, which is fixedly connected to one side of the contact tachometer body, and an installation cavity is opened in the fixing block;

[0014] A connecting plate, one end of which is detachably inserted vertically into the top of the fixing block to enter the installation cavity. The connecting plate is provided with a through threaded hole;

[0015] A fixing plate, which is fixedly connected to the other end of the connecting plate and extends towards the speed measuring head. The fixing plate is provided with a horizontally extending sliding groove;

[0016] A slider, which is slidably connected to the sliding groove;

[0017] A threaded rod, which is threadedly inserted through the connecting plate via the threaded hole and extends towards the speed measuring head;

[0018] A connecting block, which is rotatably connected to one end of the threaded rod close to the speed measuring head, and the connecting block is fixedly connected to the slider;

[0019] A friction cleaner, which is arranged at one end of the connecting block close to the speed measuring head to contact and clean the speed measuring head or move away from the speed measuring head by adjusting the threaded rod.

[0020] In the described measuring device for the torque and speed of the downhole rotary table of an oil drilling rig, it further includes,

[0021] A distance sensor, which is arranged on the back of the contact tachometer body to measure the distance between the downhole rotary tables to generate distance information;

[0022] A signal receiver, which is arranged on the back of the contact tachometer body and is electrically connected to the distance sensor to receive the distance information.

[0023] A single-chip microcomputer is provided on the back of the contact tachometer body and is electrically connected to the signal receiver to determine whether the distance between the contact tachometer body and the downhole rotary table meets a predetermined range based on the distance information.

[0024] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, an alarm is provided on the back of the contact tachometer body and is electrically connected to the output end of the single-chip microcomputer. When the distance information exceeds the predetermined range, the alarm sounds an alarm and stops the measurement.

[0025] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, a protection mechanism is further provided on the back of the contact tachometer body. The protection mechanism includes,

[0026] A rubber pad that covers the back of the contact tachometer body,

[0027] A wear-resistant coating that is provided on the periphery of the rubber pad,

[0028] A sealing coating that is hermetically connected to the rubber pad and the wear-resistant coating.

[0029] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, a central processing unit is provided inside the contact tachometer body. The central processing unit includes,

[0030] A speed measurement unit that is connected to the speed measurement head to generate a pulse signal,

[0031] A tachometer unit that is connected to the speed measurement unit to compare the pulse signal based on a reference signal to generate a rotational speed signal,

[0032] A rotational speed judgment unit that is connected to the tachometer unit to generate the rotational speed and torque of the downhole rotary table based on the rotational speed signal.

[0033] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, a communication interface connecting the rotational speed judgment unit and the tachometer unit is further included.

[0034] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, a display screen is provided on the front of the contact tachometer body, and it is connected to the central processing unit to display the rotational speed and torque.

[0035] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, the friction cleaner includes a brush head.

[0036] In the described measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, the friction cleaner and the speed measurement head are at the same horizontal height.

[0037] The measuring method of a measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig includes the following steps.

[0038] The rotating plate is rotatably connected to the connecting hole to adjust the position of the contact tachometer body relative to the underground rotary table so that the speed measuring head can contact the surface of the underground rotary table. The T-shaped rotating column is inserted into the through hole and the connecting hole in sequence to fix the rotating plate and the contact tachometer body.

[0039] The speed measuring head contacts the surface of the underground rotary table to rotate with the underground rotary table, and the contact tachometer body generates the rotational speed and torque of the underground rotary table.

[0040] The threaded rod is threadedly inserted into the connecting plate through the threaded hole and extends towards the speed measuring head. The connecting block slides along the sliding groove through the slider so that the friction cleaner contacts and cleans the speed measuring head. After cleaning, the friction cleaner is adjusted away from the speed measuring head through the threaded rod.

[0041] In the above technical solution, a measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig provided by the present invention has the following beneficial effects: By arranging a decontamination device on one side of the speed measuring head, when the speed measuring head rotates in contact with the surface of the speed measuring object, the decontamination device can clean the surface of the speed measuring head. And by rotating the threaded rod of the adjusting disc, under the action of its threaded connection with the connecting matrix, the connecting block is driven to move, so that the position of the decontamination device can be adjusted as needed, and the operation is very convenient. After inserting the connecting matrix into the fixed block and then into the equipment container, the two symmetrically distributed metal elastic sheets can clamp one end of the connecting matrix, and when disassembling, only need to dial the connecting matrix to disassemble it, so that it is convenient for storage. By setting a distance sensor, an alarm, a single-chip microcomputer and a signal receiver, the function of the distance sensor is to detect the distance between the laser port and the measured object at any time and transmit the signal to the signal receiver, and the signal receiver then transmits it to the single-chip microcomputer. The function of the single-chip microcomputer is to process and analyze and compare the signal, so as to judge whether the distance meets the specified value, and the function of the alarm is to issue an alarm to remind the operator. Therefore, the automatic control of the measurement distance is realized, which is convenient to use and increases the practicability of the tachometer. Through the settings of the limit disc, T-shaped rotating column, limit groove, rotating plate, thread B, thread A and threaded hole, rotate the T-shaped rotating column to make the T-shaped rotating column with thread B move out from the inside of thread A and the threaded hole. The rotating plate can move at the rear end of the measuring body. At this time, adjust the angle between the rotating plate and the measuring body according to the position of the measured workpiece. The two sides of the limit disc move inside the limit groove. When the rotating plate rotates, the limit disc can also remain inside the limit groove, which is convenient to adjust the angle between the rotating plate and the measuring body. Then insert the T-shaped rotating column into the threaded hole, through hole and connecting hole, and the two groups of thread B are threadedly connected inside thread A and the threaded hole to complete the fixation between the rotating plate and the underground rotary table, improving the measurement convenience and accuracy. Through the settings of the elastic gasket, sealing coating and wear-resistant coating, when the measuring body accidentally falls, the set elastic gasket deforms to absorb the impact force caused by the falling of the measuring body, thus protecting the measuring body and preventing the internal parts from being displaced and affecting its detection effect. The set sealing coating will prevent the elastic gasket from aging due to air oxidation, and the set wear-resistant coating will improve the wear resistance of the elastic gasket and avoid the friction with the ground when falling and affecting the integrity of the elastic gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0043] Figure 1 Schematic three-dimensional structure diagram of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0044] Figure 2 Schematic front sectional structure diagram of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0045] Figure 3 Schematic side sectional structure diagram of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0046] Figure 4 For Figure 2 Schematic enlarged structure diagram A of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0047] Figure 5 Schematic rear view structure diagram of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0048] Figure 6 Schematic logical structure diagram of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0049] Figure 7 Schematic structure diagram of an adjusting mechanism of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0050] Figure 8 Schematic structure diagram of a protection mechanism of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention.

[0051] Figure 9 Schematic rear view of a measuring device for torque and rotational speed of an underground rotary table of an oil drilling rig provided by an embodiment of the present invention. Detailed implementation manners

[0052] To make the objectives, 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 accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work fall within the scope of protection of the present invention.

[0053] Accordingly, 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 claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0054] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further definition and explanation thereof are not required in subsequent figures.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and 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 thus should not be construed as a limitation of the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0057] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include contact between the first and second features through additional features therebetween rather than direct contact. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0059] 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.

[0060] See Figures 1-9 As shown, in one embodiment, a measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to the present invention includes

[0061] A contact tachometer body 1, on the back of which there is at least one connection hole provided with a thread A 20;

[0062] A speed measuring head 3, which is detachably connected to the contact tachometer body 1, and the speed measuring head 3 contacts the surface of the underground rotary table to rotate with the underground rotary table;

[0063] An adjusting mechanism 18, which is arranged on the back of the contact tachometer body 1, and the adjusting mechanism 18 includes

[0064] A rotating plate 181, which is rotatably connected to the connection hole to adjust the position of the contact tachometer body 1 relative to the underground rotary table. The rotating plate 181 is provided with a limiting groove on the side close to the back of the contact tachometer body 1;

[0065] A limiting disk 184, which is installed in the limiting groove. The limiting disk 184 is provided with a through hole 185, and an internal thread 183 is provided in the through hole 185;

[0066] A T-shaped rotating column 186, which is detachably connected to the rotating plate 181. The T-shaped rotating column 186 includes two sets of thread Bs 187 respectively threadedly connected to the thread A 20 and the internal thread 183. The T-shaped rotating column 186 is inserted into the through hole 185 and the connection hole in sequence to fix the rotating plate 181 and the contact tachometer body 1;

[0067] A fixing block 4, which is fixedly connected to one side of the contact tachometer body 1, and an installation cavity 12 is formed in the fixing block 4;

[0068] A connecting plate 5, one end of which is detachably inserted vertically into the top of the fixed block 4 to enter the installation cavity 12, and the connecting plate 5 is provided with a through threaded hole;

[0069] A fixing plate 6, which is fixedly connected to the other end of the connecting plate 5 and extends towards the tachometer head 3, and the fixing plate 6 is provided with a horizontally extending sliding groove 7;

[0070] A slider 11, which is slidably connected to the sliding groove 7;

[0071] A threaded rod 8, which is threadedly inserted through the connecting plate 5 via the threaded hole and extends towards the tachometer head 3;

[0072] A connecting block 9, which is rotatably connected to one end of the threaded rod 8 close to the tachometer head 3, and the connecting block 9 is fixedly connected to the slider 11;

[0073] A friction cleaner 10, which is arranged at one end of the connecting block 9 close to the tachometer head 3 to contact and clean the tachometer head 3 or move away from the tachometer head 3 by adjusting the threaded rod 8.

[0074] In a preferred embodiment of the measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, further included is

[0075] A distance sensor 14, which is arranged on the back of the contact tachometer body 1 to measure the distance between the downhole rotary tables to generate distance information;

[0076] A signal receiver 17, which is arranged on the back of the contact tachometer body 1 and electrically connected to the distance sensor 14 to receive the distance information,

[0077] A single-chip microcomputer 16, which is arranged on the back of the contact tachometer body 1 and electrically connected to the signal receiver 17 to judge whether the distance between the contact tachometer body 1 and the downhole rotary table meets a predetermined range based on the distance information.

[0078] In a preferred embodiment of the measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, an alarm 15 is arranged on the back of the contact tachometer body 1 and electrically connected to the output end of the single-chip microcomputer 16. When the distance information exceeds the predetermined range, the alarm 15 gives an alarm and stops the measurement.

[0079] In a preferred embodiment of the measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig, a protection mechanism 19 is further included, which is arranged on the back of the contact tachometer body 1, and the protection mechanism 19 includes

[0080] A rubber pad 191, which covers the back of the contact tachometer body 1,

[0081] A wear-resistant coating 193 is provided at the periphery of the rubber pad 191.

[0082] A sealing coating 192 seals and connects the rubber pad 191 and the wear-resistant coating 193.

[0083] In a preferred embodiment of the measuring device for the torque and rotational speed of an oil drilling rig downhole rotary table, a central processing unit is provided in the contact tachometer body 1. The central processing unit includes:

[0084] A speed measuring unit that connects to the speed measuring head 3 to generate a pulse signal.

[0085] A tachometer unit that connects to the speed measuring unit to compare the pulse signal based on a reference signal to generate a rotational speed signal.

[0086] A rotational speed judging unit that connects to the tachometer unit to generate the rotational speed and torque of the downhole rotary table based on the rotational speed signal.

[0087] In the rotational speed judging unit, feedback signals such as rotational speed, current, and voltage are often detected. Therefore, there are detection units for rotational speed, current, voltage, etc. The rotational speed detection unit includes a tachogenerator, an optical encoder, etc. The current detection unit includes a current transformer, etc. The voltage detection unit includes electronic and Hall element voltage converters, etc.

[0088] In one embodiment, the central processing unit detects an open-circuit detection signal through a wireless connection, while at the other end, the central processing unit measures a pulse signal through a wireless connection. On the one hand, the central processing unit receives the open-circuit detection signal to achieve open-circuit detection and alarm of the speed sensor; on the other hand, it receives the measured pulse signal and, through parameter setting, realizes pulse quantity measurement, overspeed protection function, and displays the operating state. The logic unit is connected to the central processing unit. On the one hand, it is used to receive the speed signal for collecting the actual speed signal and outputting the measured pulse signal to the central processing unit; on the other hand, it is used to receive the digital input signal and perform digital control processing according to the control signal output by the central processing unit and output the corresponding digital output signal; the first input conditioning unit is connected to the logic unit and the central processing unit, and is used to isolate, filter, and compare and shape the speed input signal received from the outside world, and output the corresponding speed signal to the logic unit, and at the same time output the open-circuit detection signal to the logic unit and the central processing unit respectively; the second input conditioning unit is connected to the logic unit and is used to isolate, filter, and shape the digital input signal received from the outside world and output the corresponding digital input signal to the logic unit; the output processing unit is connected to the logic unit and is used to perform optoelectronic conversion on the digital output signal received from the logic unit and output the corresponding signal for output control; the protection unit is connected to the output processing unit and is used to protect the digital output state; the indication unit is connected to the logic unit and is used to receive the indication signal output from the logic unit and display the on-site operating state of the speed measurement device; the power conversion device is used to supply power to the speed measurement device;

[0089] By setting parameters, the measured pulse signal realizes pulse quantity measurement, overspeed protection function, and displays the operating state. The central processing unit controls it through a wireless signal. In addition, the central processing unit can analyze it by receiving the transfer signal and digitally display the analysis result on the screen.

[0090] In a preferred embodiment of the measuring device for the torque and speed of the downhole rotary table of an oil drilling rig, it further includes a communication interface connecting the speed judgment unit and the tachometer unit.

[0091] In a preferred embodiment of the measuring device for the torque and speed of the downhole rotary table of an oil drilling rig, a display screen 2 is provided on the front of the contact tachometer body 1, which is connected to the central processing device to display the speed and torque.

[0092] In a preferred embodiment of the measuring device for the torque and speed of the downhole rotary table of an oil drilling rig, the friction cleaner 10 includes a brush head.

[0093] In a preferred embodiment of the described measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig, the friction cleaner 10 and the speed measuring head 3 are at the same horizontal level.

[0094] In one embodiment, the measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig includes

[0095] A contact tachometer body 1, on the front of which there is a display screen 2, and on the back of which there are at least one connection hole, and the connection hole is provided with a thread A 20.

[0096] A speed measuring head 3, which is detachably connected to the contact tachometer body 1, and the speed measuring head 3 contacts the surface of the underground rotary table to rotate with the underground rotary table; further, the speed measuring head 3 is detachably installed on the top of the contact tachometer body 1.

[0097] A fixing block 4, which is fixedly connected to one side of the contact tachometer body 1, and an installation cavity 12 is formed in the fixing block 4.

[0098] A connecting plate 5, one end of which is detachably inserted vertically into the top of the fixing block 4 to enter the installation cavity 12, and the connecting plate 5 is provided with a through threaded hole. Further, a metal elastic sheet 13 for clamping the connecting plate 5 is installed inside the installation cavity 12. Further, two metal elastic sheets 13 are symmetrically distributed inside the installation cavity 12 to tightly fix the outer wall of the connecting plate 5 inserted into the installation cavity 12.

[0099] A fixing plate 6, which is fixedly connected to the other end of the connecting plate 5 and extends towards the speed measuring head 3, and a horizontally extending sliding groove 7 is formed in the fixing plate 6; the fixing plate 6 is a horizontal plate.

[0100] A slider 11, which is slidably connected to the sliding groove 7.

[0101] A threaded rod 8, which is threadedly passed through the connecting plate 5 via the threaded hole and extends towards the speed measuring head 3.

[0102] A connecting block 9, which is rotatably connected to one end of the threaded rod 8 close to the speed measuring head 3, and the connecting block 9 is fixedly connected to the slider 11.

[0103] A friction cleaner 10, which is arranged at one end of the connecting block 9 close to the speed measuring head 3 to contact and clean the speed measuring head 3 or move away from the speed measuring head 3 by adjusting the threaded rod 8; further, the friction cleaner 10 includes a brush head, and the friction cleaner 10 and the speed measuring head 3 are at the same horizontal level.

[0104] A distance sensor 14, which is arranged on the back of the contact tachometer body 1 to measure the distance between the underground rotary tables.

[0105] A signal receiver 17 is provided on the back of the contact tachometer body 1 and is electrically connected to the distance sensor 14 to receive distance information. Further, the input end of the signal receiver 17 is connected to the output end of the distance sensor 14 via a wire.

[0106] A single-chip microcomputer 16 is provided on the back of the contact tachometer body 1 and is electrically connected to the signal receiver 17 to determine whether the distance between the contact tachometer body 1 and the downhole rotary table conforms to a predetermined range based on the distance information. The single-chip microcomputer 16 is connected to the display.

[0107] An alarm 15 is provided on the back of the contact tachometer body 1 and is electrically connected to the output end of the single-chip microcomputer 16. When the distance information exceeds the predetermined range, the alarm 15 issues an alarm. Further, the alarm includes a buzzer or an LED light.

[0108] An adjusting mechanism 18 is provided on the back of the contact tachometer body 1. The adjusting mechanism 18 includes

[0109] A rotating plate 181 is rotatably connected to the connection hole on the back of the contact tachometer body 1 to adjust the rotation angle relative to the contact tachometer body 1 based on the position of the downhole rotary table. The rotating plate 181 is provided with a limiting groove on one side close to the back of the contact tachometer body 1.

[0110] A limiting disk 184 is installed in the limiting groove. The limiting disk 184 is provided with a through hole 185, and an internal thread 183 is provided in the through hole 185.

[0111] A T-shaped rotating column 186 is detachably connected to the rotating plate 181. The T-shaped rotating column 186 includes two sets of thread Bs 187 that are respectively threadedly connected to the thread A 20 and the internal thread. The T-shaped rotating column 186 is inserted into the through hole 185 and the connection hole in sequence to fix the rotating plate 181 and the contact tachometer body 1.

[0112] A protection mechanism 19 is provided on the back of the contact tachometer body 1. The protection mechanism 19 includes

[0113] A rubber pad 191 covers the back of the contact tachometer body 1.

[0114] A wear-resistant coating 193 is provided on the periphery of the rubber pad 191.

[0115] A sealing coating 192 is hermetically connected to the rubber pad 191 and the wear-resistant coating 193.

[0116] By setting a decontamination device on one side of the speed measurement head 3, when the speed measurement head 3 rotates in contact with the surface of the speed measurement object, the decontamination device can clean the surface of the speed measurement head 3. And by rotating the threaded rod 8 through the adjustment disc, under the action of its threaded connection with the coupling matrix, the connecting block 9 is driven to move, so that the position of the decontamination device can be adjusted as needed, and the operation is very convenient; and after the device inserts the coupling matrix into the fixed block 4 and then into the interior of the equipment container, the two symmetrically distributed metal elastic pieces 13 can clamp one end of the coupling matrix, and when disassembling, only need to dial the coupling matrix to disassemble it, so that it can be conveniently stored; by setting the distance sensor 14, the alarm, the single-chip microcomputer 16 and the signal receiver 17 to detect the distance between the laser port and the measured object, and transmit the signal to the signal receiver 17, and the signal receiver 17 then transmits it to the single-chip microcomputer 16. The function of the single-chip microcomputer 16 is to process and analyze and compare the signals, etc. The design can keep the outer wall of the speed measurement head 3 clean to the greatest extent, reduce data errors and reduce the risk of failure.

[0117] Further, the speed measurement head 3 is detachably installed on the top of the contact tachometer body 1; the fixing plate 6 is a horizontal plate.

[0118] Further, the input end of the signal receiver 17 is connected to the output end of the distance sensor 14 via a wire. The alarm includes a buzzer or an Led lamp. To improve the stability of the movement of the connecting block 9, the size of the sliding groove 7 is adapted to the size of the slider 11. To realize the cleaning of the outer wall of the speed measurement head 3, the decontamination device is located on one side of the speed measurement head 3, and the height of the decontamination device and the speed measurement head 3 is on the same horizontal line. To realize the reciprocating movement of the connecting block 9 at the bottom of the fixing plate 6, the connecting block 9 can form a sliding connection with the fixing plate 6 through the sliding groove 7 and the slider 11. To realize clamping the coupling matrix inserted into the fixed block 4, a device container is opened inside the fixed block 4, and a metal elastic piece 13 is installed inside the device container. There are two metal elastic pieces 13, and the two metal elastic pieces 13 are symmetrically distributed. To realize the angle adjustment, the adjustment mechanism 18 includes a rotating plate 181, a connecting rod 182, an internal thread 183, a limiting disc 184, a through hole 185, a T-shaped rotating column 186, and a thread B 187. To realize the protection and wear resistance, the protection mechanism 19 includes an elastic sealing pad, a sealing coating 192 and a wear-resistant coating 193.

[0119] In one embodiment, the measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig includes a contact tachometer body 1. The body size of the contact tachometer body 1 is 174*64*31 mm, and the body weight is approximately 200 grams. The measurement range is: contact rotational speed 1 - 19999 revolutions per minute, contact linear speed 1 - 1999.9 meters per minute. The liquid crystal display is a 5-digit 16 mm liquid crystal display. The power supply method is a 9V battery with an external charging port. The contact tachometer body 1 calculates the rotational speed by detecting signals, without the need to additionally increase a rotational speed sensor and a CAN communication instrument, and has the advantages of low cost and stable operation. A connection mechanism is provided between the contact part of the contact tachometer body 1 and the contact linear speed head, so that the contact part and the contact linear speed head can be quickly installed, and at the same time, it is also convenient for the staff to replace different contact parts for use. The surface of the contact tachometer body 1 is provided with a switch button and necessary function buttons to control the function transformation of the handheld tachometer. A display screen 2 is arranged on the surface of the contact tachometer body 1, and the display screen 2 can display rotational speed data. A speed measuring head 3 is installed at the top of the contact tachometer body 1. One side of the contact tachometer body 1 is fixedly connected with a fixed block 4. A connecting plate 5 is inserted through the top of the fixed block 4. After the connecting plate 5 and the fixing plate 6 are connected, a shape is formed. One end of the connecting plate 5 is fixedly connected with a fixing plate 6. A chute 7 is opened on the outer wall of the fixing plate 6. A threaded rod 8 is threaded through the surface of the connecting plate 5. One end of the threaded rod 8 is rotatably connected with a connecting block 9. A friction cleaner 10 is arranged at one end of the connecting block 9, and the position of the friction cleaner 10 can be adjusted by rotating the threaded rod 8. A slider 11 is fixedly connected to the outer wall of the connecting block 9.

[0120] A distance sensor 14 is installed on the back of the contact tachometer body 1. The model of the distance sensor 14 is suitable for the HJYTBEG3505 series. The output end of the distance sensor 14 is electrically connected to the input end of the signal receiver 17 through a wire. An alarm 15 is installed on the back of the contact tachometer body 1. A single-chip microcomputer 16 is installed on one side of the alarm 15. The single-chip microcomputer 16 is an existing device, and the function of the single-chip microcomputer 16 is to process and analyze the signals transmitted by the signal receiver 17. The model of the single-chip microcomputer 16 is suitable for the MCS-51 series. The output end of the single-chip microcomputer 16 is electrically connected to the input end of the alarm 15 through a wire. A signal receiver 17 is installed on one side of the single-chip microcomputer 16. The signal receiver 17 is an existing device, and the function of the signal receiver 17 is to transmit signals. The model of the signal receiver 17 is suitable for the RC-W01 series. The output end of the signal receiver 17 is electrically connected to the input end of the single-chip microcomputer 16 through a wire. By setting the distance sensor 14, the alarm 15, the single-chip microcomputer 16 and the signal receiver 17, the function of the distance sensor 14 is to detect the distance between the laser port and the measured object at any time and transmit the signal to the signal receiver 17. The signal receiver 17 then transmits it to the single-chip microcomputer 16. The function of the single-chip microcomputer 16 is to process and analyze and compare the signals to determine whether the distance meets the specified value. The function of the alarm 15 is to issue an alarm to remind the operator. Therefore, the automatic control of the measurement distance is realized, which is convenient to use and increases the practicability of the tachometer.

[0121] In one embodiment, the size of the sliding groove 7 is adapted to the size of the sliding block 11. The friction cleaner 10 is located on one side of the speed measuring head 3, and the height of the friction cleaner 10 and the speed measuring head 3 is on the same horizontal line. The connecting block 9 can form a sliding connection with the fixing plate 6 through the sliding groove 7 and the sliding block 11. Thus, during the process of rotating the threaded rod 8 to move the connecting block 9, the top of the connecting block 9 can move along the sliding groove 7 under the action of the sliding block 11, thereby improving the stability of the connecting block 9 during movement.

[0122] During specific use, by setting the friction cleaner 10 on one side of the speed measuring head 3, when the speed measuring head 3 rotates in contact with the surface of the speed measuring object, the friction cleaner 10 can clean the surface of the speed measuring head 3, and by rotating the threaded rod 8 through the adjusting disc, it drives the connecting block 9 to move under the action of its threaded connection with the connecting plate 5, so that the position of the friction cleaner 10 can be adjusted according to needs, and the operation is very convenient.

[0123] Preferably: an installation cavity 12 is opened inside the fixed block 4, and a metal elastic sheet 13 is installed inside the installation cavity 12. There are two metal elastic sheets 13, and the two metal elastic sheets 13 are symmetrically distributed, and can clamp and fix the outer wall of the connecting plate 5 inserted into the inside of the installation cavity 12.

[0124] During specific use, after the connecting plate 5 is inserted into the fixing block 4 and along the inside of the installation cavity 12, one end of the connecting plate 5 can be clamped by two symmetrically distributed metal springs 13, and when disassembling, it only needs to move the connecting plate 5 to remove it, so that it can be easily stored.

[0125] Preferably, the adjustment mechanism 18 includes a rotating plate 181 , a connecting rod 182 , an internal thread 183 , a limiting plate 184 , a through hole 185 , a T-shaped rotating column 186 , and a thread B 187 .

[0126] During specific use, by rotating the T-shaped rotating column 186, the T-shaped rotating column 186 with the thread B187 is moved out from the inside of the thread A20 and the threaded hole 183, and the rotating plate 181 can be moved at the rear end of the contact tachometer body 1. At this time, the angle between the rotating plate 181 and the contact tachometer body 1 is adjusted according to the position of the workpiece to be measured, and the two sides of the limit plate 184 move inside the limit groove. When the rotating plate 181 rotates, the limit plate 184 can also be maintained inside the limit groove, so as to facilitate the adjustment of the angle between the rotating plate 181 and the contact tachometer body 1, and then the T-shaped rotating column 186 is inserted into the inside of the internal thread 183, the through hole 185 and the connecting hole, and the two sets of threads B187 are threadedly connected to the inside of the thread A20 and the internal thread 183 to complete the fixation between the rotating plate 181 and the contact tachometer body 1.

[0127] Preferably, the protection mechanism 19 includes a rubber pad 191 , a sealing coating 192 and a wear-resistant coating 193 .

[0128] During specific use, the sealing coating 192 will prevent the rubber pad 191 from aging due to air oxidation, and the wear-resistant coating 193 will improve the wear resistance of the rubber pad 191 to prevent the friction with the ground when falling and affecting the integrity of the rubber pad 191.

[0129] During operation, when using the measuring device and method for the torque and rotational speed of an underground rotary table of an oil drilling rig, the measuring device for the torque and rotational speed of the underground rotary table of the oil drilling rig is composed of a contact tachometer body 1, a display screen 2, a speed measuring head 3, a fixing block 4, a connecting plate 5, a fixing plate 6, a sliding groove 7, a threaded rod 8, a connecting block 9, a friction cleaner 10, a slider 11, an installation cavity 12, and a metal elastic sheet 13. First, the speed measuring head 3 is brought into contact with the surface of the object to be measured for speed, and after the speed measuring object drives the speed measuring head 3 to rotate, the data is displayed on the display screen 2 of the contact tachometer body 1. When the speed measuring head 3 is adhered with stains, the threaded rod 8 is rotated by adjusting the disc, and under the action of its threaded connection with the connecting plate 5, the connecting block 9 is driven to move until the friction cleaner 10 comes into contact with the surface of the speed measuring head 3. Since the friction cleaner 10 is in contact with the surface of the speed measuring head 3, the stains on the surface of the speed measuring head 3 will be cleaned off by the friction cleaner 10 during rotation. The two symmetrically distributed metal elastic sheets 13 can clamp one end of the connecting plate 5, and during disassembly, only the connecting plate 5 needs to be toggled to disassemble it, so that it can be conveniently stored. And by setting a distance sensor 14, an alarm 15, a single-chip microcomputer 16, and a signal receiver 17, the function of the distance sensor 14 is to detect the distance between the laser port and the object to be measured at any time and transmit the signal to the signal receiver 17, and the signal receiver 17 transmits it to the single-chip microcomputer 16. The function of the single-chip microcomputer 16 is to process and analyze and compare the signal, so as to judge whether the distance meets the specified value, and the function of the alarm 15 is to give an alarm to remind the operator. Therefore, the automatic control of the measurement distance is realized, which is convenient to use and increases the practicability of the tachometer.

[0130] The measuring method of a measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig includes the following steps

[0131] The rotating plate 181 is rotatably connected to the connecting hole to adjust the position of the contact tachometer body 1 relative to the underground rotary table so that the speed measuring head 3 can contact the surface of the underground rotary table, and the T-shaped rotating column 186 is inserted into the through hole 185 and the connecting hole in sequence to fix the rotating plate 181 and the contact tachometer body 1;

[0132] The speed measuring head 3 contacts the surface of the underground rotary table to rotate with the underground rotary table, and the contact tachometer body 1 generates the rotational speed and torque of the underground rotary table;

[0133] The threaded rod 8 is threaded through the connecting plate 5 via a threaded hole and extends towards the speed measuring head 3. The connecting block 9 slides along the sliding groove 7 via the slider 11 so that the friction cleaner 10 contacts and cleans the speed measuring head 3. After cleaning, the friction cleaner 10 is adjusted away from the speed measuring head 3 via the threaded rod 8.

[0134] Finally, it should be noted that the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0135] Only some exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description 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 measuring device for the torque and rotational speed of a downhole rotary table of an oil drilling rig, characterized in that, It includes a contact tachometer body, with at least one connection hole provided on its back, and the connection hole is provided with thread A; a speed measuring head, which is detachably connected to the contact tachometer body, and the speed measuring head contacts the surface of the downhole rotary table to rotate with the downhole rotary table; an adjusting mechanism, which is provided on the back of the contact tachometer body. The adjusting mechanism includes a rotating plate, which is rotatably connected to the connection hole to adjust the position of the contact tachometer body relative to the downhole rotary table. The rotating plate is provided with a limiting groove on one side close to the back of the contact tachometer body; a limiting disk, which is installed in the limiting groove. The limiting disk is provided with a through hole, and an internal thread is provided in the through hole; a T-shaped rotating column, which is detachably connected to the rotating plate. The T-shaped rotating column includes two sets of thread B that are respectively threadedly connected to thread A and the internal thread. The T-shaped rotating column is inserted into the through hole and the connection hole in sequence to fix the rotating plate and the contact tachometer body; a fixing block, which is fixedly connected to one side of the contact tachometer body, and an installation cavity is opened in the fixing block; a connecting plate, one end of which is detachably inserted vertically into the top of the fixing block to enter the installation cavity. The connecting plate is provided with a through threaded hole; a fixing plate, which is fixedly connected to the other end of the connecting plate and extends towards the speed measuring head. The fixing plate is provided with a horizontally extending sliding groove; a slider, which is slidably connected to the sliding groove; a threaded rod, which is threadedly passed through the connecting plate via the threaded hole and extends towards the speed measuring head; a connecting block, which is rotatably connected to one end of the threaded rod close to the speed measuring head, and the connecting block is fixedly connected to the slider; a friction cleaner, which is provided at one end of the connecting block close to the speed measuring head to contact and clean the speed measuring head or move away from the speed measuring head by adjusting the threaded rod.

2. The measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig according to claim 1, characterized in that, It also includes a distance sensor, which is provided on the back of the contact tachometer body to measure the distance between downhole rotary tables to generate distance information; a signal receiver, which is provided on the back of the contact tachometer body and electrically connected to the distance sensor to receive the distance information; a single-chip microcomputer, which is provided on the back of the contact tachometer body and electrically connected to the signal receiver to judge whether the distance between the contact tachometer body and the downhole rotary table meets a predetermined range based on the distance information.

3. The measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig according to claim 2, wherein, An alarm is provided on the back of the contact tachometer body and electrically connected to the output end of the single-chip microcomputer. When the distance information exceeds the predetermined range, the alarm emits an alarm and stops measuring.

4. The measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to claim 1, wherein It also includes a protection mechanism provided on the back of the contact tachometer body. The protection mechanism includes a rubber pad, which covers the back of the contact tachometer body; a wear-resistant coating, which is provided on the periphery of the rubber pad; a sealing coating, which is hermetically connected to the rubber pad and the wear-resistant coating.

5. The measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to claim 1, characterized in that, A central processing device is provided in the contact tachometer body. The central processing device includes a speed measuring unit, which is connected to the speed measuring head to generate a pulse signal; a tachometer unit, which is connected to the speed measuring unit to compare the pulse signal based on a reference signal to generate a speed signal; a speed judgment unit, which is connected to the tachometer unit to generate the speed and torque of the downhole rotary table based on the speed signal.

6. The measuring device for the torque and rotational speed of the downhole rotary table of an oil drilling rig according to claim 5, characterized in that, It also includes a communication interface connecting the speed judgment unit and the tachometer unit.

7. A measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to claim 5, characterized in that, The front of the contact tachometer body is provided with a display screen, which is connected to the central processing unit to display the rotational speed and torque.

8. The measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to claim 1, wherein The friction cleaner includes a brush head.

9. The measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to claim 1, characterized in that, The friction cleaner and the speed measuring head are at the same horizontal height.

10. The measuring method of a measuring device for the torque and rotational speed of an underground rotary table of an oil drilling rig according to any one of claims 1-9, characterized in that, It includes the following steps. The rotating plate is rotatably connected to the connecting hole to adjust the position of the contact tachometer body relative to the downhole rotary table so that the speed measuring head can contact the surface of the downhole rotary table. The T-shaped rotating column is inserted into the through hole and the connecting hole in sequence to fix the rotating plate and the contact tachometer body. The speed measuring head contacts the surface of the downhole rotary table to rotate with the downhole rotary table, and the contact tachometer body generates the rotational speed and torque of the downhole rotary table. The threaded rod is threadedly inserted into the connecting plate through the threaded hole and extends towards the speed measuring head. The connecting block slides along the sliding groove through the slider so that the friction cleaner contacts and cleans the speed measuring head. After cleaning, the friction cleaner is adjusted away from the speed measuring head through the threaded rod.

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