Oil, gas and water wellbore cleaning equipment

Abstract

The present application provides a wellbore cleaning device for oil, gas and water wells, comprising: a drill bit, a first driving member and a controller; the first driving member is electrically connected to the controller through a cable so as to control the opening and closing of the first driving member through the controller; the output end of the first driving member is fixedly connected to the drill bit to drive the drill bit to rotate. The wellbore cleaning device for oil, gas and water wells provided by the present invention is provided with a first driving member, by fixing the drill bit on the first driving member, and electrically connecting the drill bit to the first driving member through the controller, so that the controller controls the first driving member to start, and the first driving member drives the drill bit to rotate and drill the dirt on the inner wall of the wellbore, so that the wellbore cleaning device for oil, gas and water wells can drill and remove the area in the wellbore with a smaller inner diameter or the area without an inner diameter, so as to clean the inner wall of the wellbore and improve the production efficiency of oil and gas.

Description

Technical Field

[0001] The invention relates to the technical field of oil field production engineering, and in particular to a wellbore cleaning device for oil, gas and water wells. Background Art

[0002] During the oil and gas production process, wellbores are usually used to transport oil, gas or water. The above-mentioned materials to be transported will adhere to the inner wall of the wellbore to form dirt during the transportation process. The dirt will block the wellbore to a certain extent and affect the normal production of oil and gas.

[0003] In the prior art, a diameter gauge is generally used to remove dirt from the inner wall of a wellbore. The diameter gauge includes a fixed rod and a scraper. The outer circumference of the fixed rod is provided with a scraper extending outward, and the scraper is spirally arranged on the fixed rod. When in use, the first end of the steel wire is first fixed to the upper end of the diameter gauge, and then the diameter gauge is vertically lowered into the wellbore. The operator pulls the second end of the steel wire to make the diameter gauge move up and down repeatedly in the wellbore to scrape off the dirt on the inner wall of the wellbore.

[0004] Because a scraper is provided on the outer circumference of the drift gauge, the drift gauge can only scrape off the dirt on the inner wall of the wellbore by the scraper on its outer circumference. However, when the blockage on the inner wall of the wellbore is thick, the passable inner diameter in the wellbore is small, or there is no passable inner diameter in the wellbore, so the lower end of the drift gauge cannot move downward, and the drift gauge cannot scrape off the above-mentioned blockage, and cannot clean the inner wall of the wellbore, thereby reducing the production efficiency of oil and gas. Summary of the invention

[0005] The present application provides a wellbore cleaning device for oil, gas and water wells to solve the problem in the prior art that the inner wall of the wellbore is thick and the inner diameter through which the inner wall can pass is small, so that the diameter gauge cannot move downward to scrape off the blockage, thereby reducing the production efficiency of oil and gas.

[0006] The present application provides a wellbore cleaning device for oil, gas and water wells, comprising: a drill bit, a first driving member and a controller; the first driving member is electrically connected to the controller via a cable so as to control the opening and closing of the first driving member through the controller; the output end of the first driving member is fixedly connected to the drill bit so as to drive the drill bit to rotate.

[0007] Furthermore, it also includes: a fixing member, a mounting cavity is formed inside the fixing member, the first driving member is fixed in the mounting cavity, and the output end of the first driving member extends out of the mounting cavity of the fixing member.

[0008] Furthermore, it also includes: a connecting member, the output end of the first driving member is fixedly connected to the connecting member, so as to drive the connecting member to rotate through the first driving member; at least one cleaning brush is evenly fixed on the outer circumference of the connecting member, the first end of the cleaning brush is fixed on the connecting member, and the second end of the cleaning brush extends out of the outer circumference of the connecting member.

[0009] Furthermore, a plurality of cleaning brushes are arranged on the connecting member, wherein at least two cleaning brushes are arranged at intervals along the axial direction of the connecting member, and a rotation diameter formed during the rotation of the at least two cleaning brushes decreases step by step from the upper end to the lower end of the connecting member.

[0010] Furthermore, it also includes a medicine component, which includes at least one fixed barrel, a receiving cavity for containing medicine is formed inside the fixed barrel, and a fluid through hole connected to the receiving cavity is also provided on the fixed barrel, so that the medicine in the receiving cavity can flow out through the fluid through hole; the upper end of the fixing part is fixedly connected to the lower end of the fixed barrel.

[0011] Furthermore, the medicine assembly also includes a second driving member, which is fixed at the upper end of the fixed barrel and is electrically connected to the controller; the output end of the second driving member is connected to a piston, and the piston is arranged in the receiving inner cavity of the fixed barrel, so that the second driving member drives the piston to move up and down in the fixed barrel and squeeze the medicine, so that the medicine flows out through the fluid through hole.

[0012] Furthermore, a one-way valve is installed in the fluid through hole to allow the medicine in the containing cavity to flow out.

[0013] Furthermore, a liquid level sensor is installed in the fixed barrel, and the liquid level sensor is electrically connected to the controller to detect the liquid level of the medicine in the fixed barrel.

[0014] Furthermore, a wellbore diameter sensor is installed on the fixing member, and the wellbore diameter sensor is electrically connected to the controller to detect the inner diameter of the wellbore; and / or a stabilizer is sleeved on the outer circumference of the fixing member, and the outer circumference of the stabilizer is adapted to the inner wall of the wellbore to center the device in the wellbore.

[0015] Furthermore, it also includes a display, which is connected to the controller so that the controller controls the display to display the working status of the cleaning device.

[0016] The present invention provides a wellbore cleaning device for oil, gas and water wells. The device provides a first driving member, fixes a drill bit on the first driving member, and electrically connects the first driving member through a controller, so that the controller controls the first driving member to start, and the first driving member drives the drill bit to rotate and drill the dirt on the inner wall of the wellbore, so that the cleaning device can drill and remove the area with a smaller inner diameter or the area without an inner diameter in the wellbore, so as to clean the inner wall of the wellbore and improve the production efficiency of oil and gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 It is a schematic diagram of the structure of a wellbore cleaning device for oil, gas and water wells in one embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a wellbore cleaning device for oil, gas and water wells in another embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a wellbore cleaning device for oil, gas and water wells in another embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a wellbore cleaning device for oil, gas and water wells in another embodiment of the present invention;

[0022] Figure 5 for Figure 4 Schematic diagram of the internal structure of the fixed barrel;

[0023] Figure 6 for Figure 4 Schematic diagram of the structure of the wellbore cleaning device for oil, gas and water wells being lowered into the oil pipe;

[0024] Figure 7 This is a schematic diagram of the controller structure.

[0025] Reference numerals:

[0026] 100-drill bit;

[0027] 200-first driving member; 210-fixing member;

[0028] 300-controller;

[0029] 400-connector; 410-cleaning brush;

[0030] 510-fixed barrel; 511-fluid through hole; 512-piston; 520-second driving member;

[0031] 600-well diameter sensor;

[0032] 700-Centralizer.

[0033] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements.

[0035] Reference below Figure 1 A wellbore cleaning device for oil, gas or water wells according to an embodiment of the present application is described. Figure 1 As shown, the present application provides an oil, gas or water wellbore cleaning device, comprising: a drill bit 100, a first driving member 200 and a controller 300; the first driving member 200 is electrically connected to the controller 300 via a cable so as to control the opening and closing of the first driving member 200 via the controller 300; the output end of the first driving member 200 is fixedly connected to the drill bit 100 so as to drive the drill bit 100 to rotate.

[0036] Specifically, the drill bit 100 includes a head end in contact with the object to be drilled and a tail end away from the head end. Optionally, the drill bit 100 may be a twist drill, a hollow drill, or a structure with a gradually changing cross section. For example, the cross section of the drill bit 100 gradually decreases from the tail end to the head end, so that the drillable surface of the drill bit 100 gradually increases. The drill bit 100 may be made of high-speed steel, cemented carbide, tungsten steel, or other materials.

[0037] The first driving member 200 may be a motor, and the first driving member 200 may be fixed on a motor fixing plate, and the extension direction of the output end of the motor is perpendicular to the motor fixing plate. Optionally, the motor may be a DC motor, and the model of the DC motor is not specifically limited here, and the DC motor may be selected according to the size of the drill bit 100 in actual operation, so that the DC motor can drive the drill bit 100 to rotate. Optionally, the motor fixing plate may be a circular plate or a rectangular plate.

[0038] Optionally, the motor can be fixedly connected to the motor fixing plate by means of bolts and nuts. For example, a first fixing hole is provided on the motor fixing plate, and a second fixing hole matching the first fixing hole is provided on the motor casing. The bolt passes through the second fixing hole and the first fixing hole in sequence and is fastened with the nut to ensure a fast connection between the motor and the motor fixing plate.

[0039] The output end of the motor is fixedly connected to the drill bit 100. Optionally, the output end of the motor can be an output shaft, and the output shaft can be fixedly connected to the tail end of the drill bit 100 by bolts and nuts to facilitate replacement and maintenance of the drill bit 100. For example, a first through hole is provided at the lower end of the output shaft, and a second through hole is provided at the tail end of the drill bit 100. The bolts pass through the first through hole and the second through hole in sequence and are connected to the nuts to ensure a tight connection between the drill bit 100 and the output shaft.

[0040] The controller 300 may include a receiving module, a control module and a display module. The receiving module is connected to the control module, and processes the received signal, stores it and transmits it to the display module. The operator can transmit instructions to the control module based on the data displayed on the display module. The control module controls the first drive member 200 or other components to change certain parameters to complete the instructions.

[0041] The first driving member 200 is electrically connected to the controller 300 via a cable. Optionally, the first driving member 200 can be connected to a control module of the controller 300 via a cable to control the opening and closing of the motor and the change of the gear position through the control module, thereby causing the drill bit 100 to start rotating, stop rotating, and change the rotation speed. Optionally, a through hole can be provided on the motor fixing plate, and the cable is electrically connected to the controller 300 after passing through the through hole on the motor fixing plate.

[0042] Optionally, a weighting member may be provided at the upper end of the first driving member 200 to increase the weight of the cleaning device of this embodiment, so that the weight of the cleaning device is greater than the buoyancy inside the wellbore, so that the cleaning device can be lowered into the wellbore to drill out dirt and move downward in the wellbore. Optionally, the weighting member may be a cylinder, for example, a cylinder with a circular or rectangular cross-section. Among them, the weighting member may be welded to the upper end of the first driving member 200, for example, the weighting member is welded to the motor fixing plate; the weighting member may also be fixed to the upper end of the first driving member 200 by a threaded connection, for example, the weighting member is fixed to the upper end of the motor fixing plate by a threaded connection, a weighting rod threaded hole is provided at the lower end of the weighting rod, a fixing plate threaded hole is provided at the corresponding position of the fixing plate, and screws are inserted in the fixing plate threaded hole and the weighting rod threaded hole in sequence to achieve a fastening connection between the motor fixing plate and the weighting rod.

[0043] Optionally, a steel wire or rope may be provided at the upper end of the first driving member 200. For example, a handle is provided at the upper end of the motor fixing plate, the first end of the steel wire or the first end of the rope is fixed to the handle, and the second end of the steel wire or the second end of the rope extends out of the wellbore and is connected to a component outside the wellbore, so as to pull the cleaning device through the steel wire or rope. Optionally, when a weight is provided at the upper end of the first driving member 200, the first end of the steel wire or the first end of the rope may also be fixed to the weight.

[0044] The oil, gas, and water wellbore cleaning device provided by this embodiment is mainly used in vertical pipes or wellbores, such as oil pipes, casings, etc. When it is necessary to drill out the dirt on the inner wall of the wellbore, the cleaning device is first lowered into the wellbore, the controller 300 controls the first driving member 200 to turn on, the output end of the first driving member 200 drives the drill bit 100 to rotate, and the drill bit 100 drills out the dirt on the inner wall of the wellbore. If necessary, the cleaning device can be pulled up and down by cables or steel wires; when the dirt on the inner wall of the wellbore is drilled out, the controller 300 controls the first driving member 200 to turn off, the drill bit 100 stops rotating, and the operator can take the cleaning device out of the wellbore by cables or steel wires.

[0045] The present embodiment provides a wellbore cleaning device for oil, gas and water wells. The first driving member 200 is provided, and the drill bit 100 is fixed on the first driving member 200. The device is electrically connected to the first driving member 200 through a controller 300, so that the controller 300 controls the first driving member 200 to start, and the first driving member 200 drives the drill bit 100 to rotate and drill the dirt on the inner wall of the wellbore. The cleaning device can drill the area with a smaller inner diameter or the area without an inner diameter in the wellbore, so as to clean the inner wall of the wellbore and improve the production efficiency of oil and gas.

[0046] Furthermore, it also includes: a fixing member 210 , a mounting cavity is formed inside the fixing member 210 , the first driving member 200 is fixed in the mounting cavity, and the output end of the first driving member 200 extends out of the mounting cavity of the fixing member 210 .

[0047] Specifically, Figure 2 As shown, the fixing member 210 can be a column, for example, with a circular or rectangular cross section, and the fixing member 210 can select a structure that is compatible with the inner diameter of the wellbore, that is, when the cross section of the wellbore is circular, the fixing member 210 can select a cylinder; when the cross section of the wellbore is rectangular, the fixing member 210 can select a prism. An installation cavity is formed inside the fixing member 210 for fixing the first driving member 200 to prevent the first driving member 200 from being exposed in the wellbore and corroded.

[0048] The upper end of the first driving member 200 is fixed on the top wall of the fixing member 210, and the lower end of the first driving member 200, i.e., the output end, extends from the bottom wall of the fixing member 210. Optionally, the upper end of the first driving member 200 can be fixed to the top wall of the fixing member 210 by bolt and nut connection. For example, a first through hole is provided on the first driving member 200, and a second through hole is provided on the top wall of the fixing member 210. The bolts pass through the first through hole and the second through hole in turn and are connected with the nuts to realize a fastened connection between the fixing member 210 and the first driving member 200.

[0049] Optionally, a bottom wall through hole is provided on the bottom wall of the fixing member 210 through which the first driving member 200 can extend, and the output end of the first driving member 200 and the bottom wall through hole can be matched with a rotating seal to achieve sealing inside the fixing member 210, so that the first driving member 200 is in a dry environment, avoiding moisture in the wellbore from adhering to the first driving member 200, causing corrosion of the first driving member 200 or damage due to poor circuit contact, thereby affecting the normal use of the cleaning device due to damage to the first driving member 200.

[0050] Specifically, the inner circumference of the bottom wall through hole may be provided with a groove, and a sealing ring is provided in the groove. When the output end of the first driving member 200 rotates in the bottom wall through hole, the bottom wall through hole and the output end of the first driving member 200 can achieve rotational sealing cooperation through the sealing ring.

[0051] Optionally, a top wall through hole is further provided on the top wall of the fixing member 210 for passing a cable through so that the first driving member 200 and the controller 300 are electrically connected. A sealing ring is provided between the bottom wall through hole and the cable so that the interior of the fixing member 210 is sealed.

[0052] The present embodiment provides a wellbore cleaning device for oil, gas or water wells, which fixes a first drive member 200 in an installation cavity of a fixing member 210 and extends an output end of the first drive member 200 out of the installation cavity of the fixing member 210, so that the first drive member 200 is enclosed in the installation cavity formed by the fixing member 210, thereby preventing moisture in the wellbore from corroding the first drive member 200, thereby affecting the driving performance of the first drive member 200 and causing the cleaning device to be unable to be used normally.

[0053] Furthermore, it also includes: a connecting member 400, the output end of the first driving member 200 is fixedly connected to the connecting member 400, so as to drive the connecting member 400 to rotate through the first driving member 200; at least one cleaning brush 410 is evenly fixed on the outer circumference of the connecting member 400, the first end of the cleaning brush 410 is fixed on the connecting member 400, and the second end of the cleaning brush 410 extends out of the outer circumference of the connecting member 400.

[0054] Specifically, Figure 3 As shown, the connector 400 may be a cylinder, for example, with a circular or rectangular cross section. Taking the connector 400 as a cylinder as an example, the connector 400 includes a connector top wall, a connector bottom wall, and a connector side wall between the top wall and the bottom wall, wherein a receiving cavity is formed between the connector top wall, the connector bottom wall, and the connector side wall, and the receiving cavity is used to receive a portion of the output end of the first drive member 200; a top wall through hole is provided on the top wall of the connector, and a bottom wall through hole is provided on the bottom wall of the connector, and a portion of the output end of the first drive member 200 passes through the top wall through hole and the bottom wall through hole in sequence to pass through the receiving cavity and connect to the drill bit 100.

[0055] Optionally, a connecting rod is provided on a part of the output end of the first driving member 200 accommodated in the accommodating cavity, one end of the connecting rod is fixedly connected to the output end of the first driving member, and the other end of the connecting rod is fixedly connected to the connecting member 400, so as to drive the connecting member 2 to rotate through the output end of the first driving member 200. Specifically, the connecting rod can be a screw or a bolt. When the connecting rod is a screw, a first threaded hole is provided on the side wall of the output end of the first driving member 200, and a second threaded hole matched with the first threaded hole is provided on the side wall of the connecting member 400. The screw is inserted into the second threaded hole and the first threaded hole in sequence to achieve a fastened connection between the connecting member 400 and the output end of the first driving member 200.

[0056] The output end of the first driving member 200 and the top wall through hole and the bottom wall through hole of the connecting member 400 can be connected in a rotational sealing manner. Specifically, grooves are respectively provided on the inner walls of the top wall through hole and the bottom wall through hole, and rubber rings are respectively fixed in the grooves to achieve the rotational sealing connection between the output end of the first driving member 200 and the connecting member 200. In this embodiment, the output end of the first driving member 200 and the top wall through hole and the bottom wall through hole of the connecting member 400 are connected in a rotational sealing manner, further avoiding the contact of part of the output end of the first driving member 200 with moisture in the wellbore, and preventing part of the output end of the first driving member 200 from being corroded.

[0057] The cleaning brush 410 may be strip-shaped, such as circular, rectangular or semicircular in cross section. The cleaning brush 410 may be made of an organic material with certain flexibility, such as a rubber strip, so that the cleaning brush can be resistant to high temperature, salt, corrosion, pressure and wear.

[0058] The cleaning brush 410 is fixed on the outer circumference of the connecting member 400. Optionally, the cleaning brush 410 can be connected to the connecting member 400 by bonding, wherein the first end of the cleaning brush 410 is fixed on the connecting member 400, and the second end of the cleaning brush 410 extends out of the outer circumference of the connecting member 400. It can be understood that the second end of the cleaning brush 410 can extend perpendicularly to the outer circumference of the connecting member 400, or extend at a certain angle to the connecting member 400. For example, the cleaning brush 410 can be at an acute angle or an obtuse angle to the axis of the connecting member 400, so that the cleaning brush 410 can brush off the dirt and powder drilled by the drill bit 100, and at the same time, can brush off the relatively loose dirt on the inner wall of the wellbore. Optionally, the other end of the cleaning brush 410 can have burrs to improve the brushing effect of the cleaning brush.

[0059] A wellbore cleaning device for oil, gas or water wells provided in this embodiment is used. When it is necessary to drill out dirt on the inner wall of the wellbore, the operator first lowers the cleaning device into the wellbore, and the controller 300 controls the first driving member 200 to open. The output end of the first driving member 200 drives the drill bit 100 to rotate, and the drill bit 100 drills out the dirt in the wellbore. As the drill bit 100 continues to drill out the inner wall of the wellbore, the drill bit 100 moves downward, and the cleaning brush 410 on the connecting member 400 rotates with the connecting member 400 and brushes out the dirt on the inner wall of the wellbore; when the dirt on the inner wall of the wellbore is drilled out, the controller 300 controls the first driving member 200 to close, the first driving member 200 stops rotating, and the cleaning device is pulled out of the wellbore.

[0060] The present embodiment provides a wellbore cleaning device for oil, gas or water wells. By providing a connecting member 400 fixedly connected to a first driving member 200 and by evenly fixing at least one cleaning brush 410 on the outer circumference of the connecting member 400, the first driving member 200 can drive the connecting member 400 to rotate, thereby driving the cleaning brush 410 to rotate, making it easier for the cleaning brush 410 to brush away dirt on the inner wall of the wellbore, thereby improving the efficiency of the cleaning device in removing dirt.

[0061] Furthermore, a plurality of cleaning brushes 410 are disposed on the connecting member 400 , wherein at least two cleaning brushes 410 are spaced apart along the axial direction of the connecting member 400 , and a rotation diameter formed during the rotation of the at least two cleaning brushes 410 decreases step by step from the upper end to the lower end of the connecting member 400 .

[0062] Specifically, a plurality of cleaning brushes 410 may be provided on the connector 400. It is understandable that the plurality of cleaning brushes 410 may be spaced apart along the axial direction of the connector 400, may be spaced apart along the radial direction of the connector 400, or may be spaced apart along the axial direction and the radial direction of the connector 400.

[0063] When the cleaning brushes 410 are evenly arranged in the radial direction of the connecting member 400, the lengths of the cleaning brushes 410 located at the same horizontal plane of the connecting member 400 extending out of the outer circumference of the connecting member 400 can be the same, so that multiple cleaning brushes 410 can brush the same area of ​​the inner wall of the wellbore multiple times, thereby improving the brushing efficiency of the cleaning brushes 410.

[0064] When the cleaning brushes 410 are arranged axially at intervals on the connecting member 400, the rotation diameter formed during the rotation of at least two cleaning brushes 410 gradually decreases from the upper end to the lower end of the connecting member 400. It can be understood that the rotation diameter formed during the rotation of two adjacent cleaning brushes 410 axially arranged on the connecting member 400, the cleaning brush 410 fixed at the upper end of the connecting member 400, is greater than the rotation diameter formed during the rotation of the cleaning brush 410 fixed at the lower end of the connecting member 400. Based on the above arrangement, during the rotation of the first driving member 200, it is convenient to form cleaning brushes 410 with a variety of rotation diameters, so as to facilitate the brushing of the inner wall of the wellbore layer by layer, thereby further improving the brushing efficiency of the cleaning brush 410.

[0065] Furthermore, it also includes a medicine component, which includes at least one fixed barrel 510, a receiving cavity for containing medicine is formed inside the fixed barrel 510, and a fluid through hole 511 connected to the receiving cavity is also provided on the fixed barrel 510, so that the medicine in the receiving cavity can flow out through the fluid through hole 511; the upper end of the fixing member 210 is fixedly connected to the lower end of the fixed barrel 510.

[0066] Specifically, Figure 4 , 5 As shown in FIG. 6 , the medicine assembly includes at least one fixed barrel 510. It can be understood that there can be one or more fixed barrels 510. When there are more than one fixed barrels 510, the multiple fixed barrels 510 can be fixed to the upper end of the fixing member 210 in a manner of being connected end to end. The fixed barrel 510 can be a cylinder with a circular or rectangular cross-section.

[0067] The interior of the fixed barrel 510 is formed with a receiving cavity for containing medicines. The medicines referred to in this embodiment include asphalt dispersants or wax removal chemicals for dissolving organic blockages, acid for dissolving inorganic blockages, etc. The fixed barrel 510 is provided with a fluid through hole 511, which is connected to the receiving cavity. Optionally, the fluid through hole 511 can be arranged on the outer circumference or bottom wall of the fixed barrel 510, so that the fluid in the fixed barrel 510 flows out through the fluid through hole 511 under the action of pressure.

[0068] The fixed barrel 510 is fixed to the upper end of the fixing member 210. Optionally, the lower end of the fixed barrel 510 and the upper end of the fixing member 210 can be connected by a flange or by bolts and nuts. When the lower end of the fixed barrel 510 and the upper end of the fixing member 210 are connected by bolts and nuts, the lower end of the fixed barrel 510 can be provided with a first outer edge protruding outward, and the upper end of the fixing member 210 can be provided with a second outer edge protruding outward, a first through hole is provided on the first outer edge, and a second through hole is provided on the second outer edge. The bolts pass through the second through hole and the first through hole in sequence and are fastened with the nuts to fasten the fixed barrel 510 to the fixing member 210.

[0069] When the reagent component includes a fixed barrel 510, the fixed barrel 510 can contain reagents that dissolve inorganic substances, or reagents that dissolve organic substances. Under the condition that the organic reagent and the inorganic reagent do not react with each other, the fixed barrel 510 can also contain a mixture of organic reagents and inorganic reagents.

[0070] When the reagent component includes multiple fixed barrels 510, taking the reagent component including two fixed barrels 510 as an example, the two fixed barrels 510 are respectively called the first fixed barrel and the second fixed barrel, the first fixed barrel is fixed to the upper end of the second fixed barrel, and the second fixed barrel is fixedly connected to the fixing member 210, the first fixed barrel can hold inorganic reagents, and the second fixed barrel can hold organic reagents, so as to dissolve the dirt on the inner wall of the wellbore.

[0071] Using a wellbore cleaning device for oil, gas and water wells provided in this embodiment, before cleaning the dirt on the inner wall of the wellbore, the operator first pours the agent into the fixed barrel 510, then lowers the cleaning device into the wellbore, controls the first driving member 200 to rotate through the controller 300, and the first driving member 200 drives the drill bit 100 to rotate and drill the dirt on the inner wall of the wellbore. The agent in the fixed barrel 510 flows out through the fluid through hole 511 and flows along the fixed barrel 510 through the outer circumference of the fixed member 210 to the outer circumference of the connecting member 400 and the cleaning brush 410. The connecting member 400 rotates, so that the agent on the connecting member 400 splashes onto the inner wall of the wellbore, and the agent dissolves the dirt on the inner wall of the wellbore. The cleaning brush 410 rotates and brushes off the dirt on the inner wall of the wellbore; at the same time, the agent will also flow along the connecting member 400 to the drill bit 100, lubricate the drill bit 100 and dissolve the dirt on the inner wall of the wellbore. When the dirt on the inner wall of the wellbore is cleaned, the operator pulls out the cleaning device.

[0072] The present embodiment provides a wellbore cleaning device for oil, gas and water wells, which comprises a medicine assembly including at least one fixed barrel 510, a receiving cavity for containing medicines is provided in the fixed barrel 510, and a fluid through hole 511 connected to the receiving cavity is provided on the fixed barrel 510, so that the medicine can flow out of the receiving cavity under the action of pressure, and then flow along the outer circumference of the fixed barrel 510 to the outer circumference of the connecting member 400, the cleaning brush 410 and the drill bit 100, so as to facilitate the flow of the medicine through the fixed barrel 510. The rotation of the connecting piece 400 splashes the agent onto the inner wall of the wellbore to clean the dirt on the inner wall of the wellbore; at the same time, during the brushing process of the cleaning brush 410, the agent on the cleaning brush 410 dissolves the dirt on the inner wall of the wellbore, making it easier for the cleaning brush 410 to clean the dirt on the inner wall of the wellbore; the agent flowing onto the drill bit 100 can lubricate the drill bit 100 on the one hand, and dissolve the dirt that the drill bit contacts on the other hand, making it easier for the drill bit 100 to drill the dirt on the inner wall of the wellbore.

[0073] Furthermore, the medicine assembly also includes a second driving member 520, which is fixed at the upper end of the fixed barrel 510 and is electrically connected to the controller 300; the output end of the second driving member 520 is connected to a piston 512, and the piston 512 is arranged in the receiving inner cavity of the fixed barrel 510, so that the second driving member 520 drives the piston 512 to move up and down in the fixed barrel 510 and squeeze the medicine, so that the medicine flows out through the fluid through hole 511.

[0074] Specifically, the second driving member 520 may be a stepping motor. The second driving member 520 is electrically connected to the controller 300 so that the controller 300 controls the opening and closing of the second driving member 520 .

[0075] The piston 512 is a plate-shaped body. Optionally, the cross-section of the piston 512 is adapted to the cross-section of the fixed barrel 510. It can be understood that when the cross-section of the fixed barrel 510 is circular, the piston 512 is a circular plate to facilitate the piston 512 to move up and down in the fixed barrel 510 and squeeze the medicine.

[0076] The output end of the second driving member 520 is connected to the piston plate. Optionally, the output end of the second driving member 520 can be connected to the piston plate through a connecting rod, that is, the first end of the connecting rod is connected to the output end of the second driving member 520, and the second end of the connecting rod is connected to the piston plate. The first end of the connecting rod can be connected to the output end of the second driving member 520 by a bolt and nut connection method. The first end of the connecting rod is provided with a first through hole, and the output end of the second driving member 520 is provided with a second through hole. The bolt passes through the first through hole and the second through hole and is fastened with the nut, so that the output end of the second driving member 520 is fastened to the first end of the connecting rod; the second end of the connecting rod can be connected to the piston plate by welding.

[0077] The second driving member 520 is fixed to the upper end of the fixed barrel 510. Optionally, the second driving member 520 can be fixed on the upper end surface of the fixed barrel 510, or on a fixed plate on the upper end of the fixed barrel 510, or in a first fixed portion on the upper end of the fixed barrel 510. When the second driving member 520 is fixed in the fixed barrel 510, specifically, the first fixed portion is a column, and a fixed cavity is formed inside the first fixed portion. The output end of the second driving member 520 extends out of the first fixed portion, and the output end of the second driving member 520 is connected to the first fixed portion in a sliding seal so that the second driving member 520 is fixed in a closed space to prevent the second driving member 520 from being corroded due to being exposed in the wellbore, thereby affecting the normal operation of the cleaning device.

[0078] When it is necessary to make the medicine in the fixed barrel 510 flow out of the fluid through hole 511, the controller 300 controls the second driving member 520 to open, and the output end of the second driving member 520 pushes the piston to move downward in the receiving cavity. The piston squeezes the medicine in the receiving cavity, and the medicine flows out through the fluid through hole 511 under the action of pressure.

[0079] When the medicine assembly includes two fixed barrels 510, the two fixed barrels 510 are respectively referred to as the first fixed barrel and the second fixed barrel, the first fixed barrel is fixed to the upper end of the second fixed barrel, and the first fixed barrel is provided with a first through hole on the top wall, a second through hole on the bottom wall, and a third through hole on the top wall of the second fixed barrel; the first fixed barrel and the second fixed barrel are both provided with pistons 512, wherein the piston in the first fixed barrel is connected to the output end of the second driving member 520 through the first through hole on the top wall, and the piston in the second fixed barrel is connected to the piston 512 in the first fixed barrel through the third through hole and the second through hole in sequence through a connecting rod, and the connecting rod and the second through hole are connected in a sliding sealing manner to prevent leakage of medicine in the first fixed barrel. The medicines in the two fixed barrels 510 can be the same or different.

[0080] When it is necessary to make the medicines in the two fixed barrels 510 flow out of the fluid through hole 511, the controller 300 controls the second driving member 520 to open, and the output end of the second driving member 520 pushes the piston in the first fixed barrel to move downward, the piston in the first fixed barrel drives the connecting rod to move downward, and the connecting rod drives the piston in the second fixed barrel to move downward, and the pistons in the first fixed barrel and the second fixed barrel both squeeze the medicine, so that the medicines in the first fixed barrel and the second fixed barrel flow out through the fluid through hole 511 respectively.

[0081] Optionally, the wellbore cleaning device for oil, gas or water wells in this embodiment can be lowered into the oil pipe 800, or into the casing, or into other vertical pipelines, which is not specifically limited here.

[0082] The present embodiment provides a wellbore cleaning device for oil, gas and water wells, which disposes a second driving member 520 electrically connected to a controller 300 at the upper end of a fixed barrel 510, disposes a piston in a receiving cavity of the fixed barrel 510, and connects the output end of the second driving member 520 to the piston, so that the piston can move up and down in the receiving cavity and squeeze the medicine in the receiving cavity, thereby making the medicine in the receiving cavity flow out through the fluid through hole 511, so as to facilitate the smooth flow out of all medicines in the receiving cavity.

[0083] Furthermore, a one-way valve is installed in the fluid through hole 511 to allow the medicine in the containing cavity to flow out.

[0084] Specifically, a one-way valve is installed in the fluid through hole 511 so that the medicine in the receiving cavity can only flow out of the receiving cavity. When the medicine is not needed to flow out of the receiving cavity, the medicine in the receiving cavity can be prevented from flowing out.

[0085] Optionally, a nozzle may be provided on the fluid through hole 511, wherein an internal thread is provided on the hole wall of the fluid through hole 511, an external thread is provided on the inlet end of the nozzle, and the inlet end of the nozzle cooperates with the fluid through hole 511 so that the nozzle is fixedly connected to the fluid through hole 511. The nozzle is provided on the fluid through hole 511 to facilitate spraying of the medicine to the outside of the fixed barrel 510.

[0086] Furthermore, a liquid level sensor is installed in the fixed barrel 510 , and the liquid level sensor is electrically connected to the controller 300 to detect the liquid level of the medicine in the fixed barrel 510 .

[0087] Specifically, a liquid level sensor may be installed inside the fixed barrel 510, and the liquid level sensor may be arranged on the bottom wall of the fixed barrel 510, or may be arranged on the side wall of the fixed barrel 510. The liquid level sensor may be electrically connected to the controller 300 via a cable, wherein a through hole is provided on the top wall of the fixed barrel 510, and the cable of the liquid level sensor is connected to the controller 300 via the through hole, and optionally, the cable of the liquid level sensor is sealed and connected to the fixed barrel 510.

[0088] This embodiment provides a wellbore cleaning device for oil, gas and water wells. By installing a liquid level sensor in a fixed barrel, the liquid level sensor can detect the liquid level of the agent in the fixed barrel 510, making it easy for the operator to control the amount of the agent in the fixed barrel so as to add the agent to the fixed barrel 510 in time.

[0089] Optionally, a wellbore diameter sensor 600 is installed on the fixing member 210 , and the wellbore diameter sensor 600 is electrically connected to the controller 300 to detect the inner diameter of the wellbore.

[0090] Specifically, the wellbore diameter sensor 600 may also be called a distance sensor, which is mainly used to measure the inner diameter of the wellbore.

[0091] The wellbore diameter sensor 600 is installed on the fixing part 210, and can also be installed on the fixing barrel 510, so as to measure the inner diameter of the wellbore after drilling by the drill bit 100 and transmit the data to the controller 300. The operator can judge whether the inner wall of the wellbore is drilled clean according to the data displayed by the controller 300, so as to lift the drill bit 100 upward or continue to lower it to clean the inner wall of the wellbore.

[0092] Optionally, a centralizer 700 is sleeved on the outer circumference of the fixing member 210, and the outer circumference of the centralizer 700 is matched with the inner wall of the wellbore to center the device in the wellbore.

[0093] Specifically, the centralizer 700 may include an annular plate and a connecting rod, wherein the connecting rod is fixed to the outside of the annular plate so as to contact the inner wall of the wellbore, so that the cleaning device is centered in the wellbore. Optionally, an elastic member may be fixed to the inner circumference of the annular plate so that the centralizer 700 is sleeved on the outer circumference of the fixing member 210.

[0094] Optionally, the annular plate may also be sleeved on the outer circumference of the fixed barrel 510 to center the cleaning device in the wellbore.

[0095] Furthermore, a display is included, and the display is connected to the controller 300, so that the controller 300 controls the display to display the working status of the cleaning device.

[0096] Specifically, Figure 7 As shown, the display is connected to the controller 300. Optionally, the controller 300 can be embedded in the display or can be set independently of the display.

[0097] The working state of the cleaning device refers to the liquid level in the fixed barrel, the well diameter detected by the well diameter sensor, and the rotation speeds of the first driving member and the second driving member.

[0098] The controller 300 may include a control module, a storage module and an alarm module, wherein the control module is connected to the storage module, the control module is connected to the alarm module, and the control module is connected to the display. At the same time, the control module is connected to the wellbore sensor 600 and the liquid level sensor, and receives the detection signals sent by the wellbore sensor 600 and the liquid level sensor. The control module processes the received detection signals and transmits them to the storage module and the display respectively. The control module transmits the processed data to the storage module, which is convenient for analyzing the cleaning performance of the cleaning device to further improve the scraping effect of the cleaning device; the control module transmits the processed data to the display, so that the operator can promptly know the data of the inner diameter of the wellbore and the liquid level of the agent in the fixed barrel 510, and judge whether it is necessary to repeatedly scrape the inner wall of the wellbore up and down or whether it is necessary to lift the cleaning device to add agents.

[0099] Taking the control module receiving the signal transmitted by the caliper sensor 600 as an example, the control module stores the standard range value of the inner diameter of the wellbore in advance. When the control module receives and processes the received signal, the control module compares the processed data with the standard range value. When the processed data is greater than the standard range value, it means that the dirt on the inner wall of the wellbore has not been drilled out. The control module sends a signal to the alarm module, and the alarm module starts the alarm. At the same time, the control module controls the adjustment device to reel in the steel wire connected to the cleaning device, so that the cleaning device moves up in the wellbore and uses the drill bit and the cleaning brush to remove the dirt on the inner wall of the wellbore; then the control module controls the adjustment device to release the steel wire to move down, and then remove the dirt on the inner wall of the wellbore until the signal transmitted by the caliper sensor 600 reaches within the standard range value. Optionally, the adjustment device can be a winch, wherein the first end of the steel wire is connected to the upper end of the cleaning device, and the second end of the steel wire is reeled on the winch.

[0100] The present embodiment provides a wellbore cleaning device for oil, gas and water wells. By providing a display connected to a controller, an operator can intuitively know the diameter of the inner wall of the wellbore after drilling by the cleaning device, so as to determine whether the inner wall of the wellbore after cleaning meets the standards, and the operator can promptly know the condition of the inner wall of the wellbore.

[0101] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0102] It should be understood that although some embodiments have been shown in the present disclosure, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A wellbore cleaning device for oil, gas or water wells, characterized in that: include: a drill bit, a first drive member, and a controller; The first driving member is electrically connected to the controller via a cable so that the controller can control the opening and closing of the first driving member; The output end of the first driving member is fixedly connected to the drill bit to drive the drill bit to rotate; A weighting member is provided at the upper end of the first driving member, which is used to increase the weight of the oil, gas or water wellbore cleaning device so that the weight of the cleaning device is greater than the buoyancy inside the wellbore; The oil, gas and water wellbore cleaning device also includes a fixing part and a connecting part; The connecting member is provided with a plurality of cleaning brushes, wherein at least two cleaning brushes are arranged at intervals along the axial direction of the connecting member, and the rotation diameter formed by the at least two cleaning brushes during rotation gradually decreases from the upper end to the lower end of the connecting member; A well diameter sensor is installed on the fixing member, and the well diameter sensor is electrically connected to the controller to detect the inner diameter of the wellbore; A mounting cavity is formed inside the fixing member, the first driving member is fixed in the mounting cavity, and an output end of the first driving member extends out of the mounting cavity of the fixing member; The output end of the first driving member is fixedly connected to the connecting member so as to drive the connecting member to rotate through the first driving member; The oil, gas and water well cleaning device further comprises a medicine assembly, wherein the medicine assembly comprises at least one fixed barrel, wherein a receiving cavity for containing medicine is formed inside the fixed barrel, and a fluid through hole communicating with the receiving cavity is further provided on the fixed barrel, so that the medicine in the receiving cavity can flow out through the fluid through hole; the upper end of the fixing member is fixedly connected to the lower end of the fixed barrel; A one-way valve is installed in the fluid through hole to allow the medicine in the receiving cavity to flow out; A liquid level sensor is installed in the fixed barrel, and the liquid level sensor is electrically connected to the controller to detect the liquid level of the medicine in the fixed barrel.

2. The oil, gas and water wellbore cleaning device according to claim 1, characterized in that: At least one cleaning brush is evenly fixed on the outer circumference of the connecting member, a first end of the cleaning brush is fixed on the connecting member, and a second end of the cleaning brush extends out of the outer circumference of the connecting member.

3. The oil, gas and water wellbore cleaning device according to claim 1, characterized in that: The medicine assembly further includes a second driving member, which is fixed to the upper end of the fixed barrel and is electrically connected to the controller; The output end of the second driving member is connected to a piston, and the piston is disposed in the receiving inner cavity of the fixed barrel, so that the second driving member drives the piston to move up and down in the fixed barrel and squeeze the medicine, so that the medicine flows out through the fluid through hole.

4. The oil, gas and water wellbore cleaning device according to claim 1, characterized in that: A centralizer is sleeved on the outer circumference of the fixing member, and the outer circumference of the centralizer is matched with the inner wall of the wellbore so that the device is centered in the wellbore.

5. The oil, gas and water wellbore cleaning device according to claim 1, characterized in that: It also includes a display, which is connected to the controller so that the controller controls the display to display the working status of the cleaning device.

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