Electric remote control anti-freezing plugging device of blowout prevention pipe for well logging

Abstract

The invention relates to the technical field of oil field well logging, in particular to an electric remote control anti-freezing plugging device of a blowout prevention pipe for well logging, which comprises a plug main body, a heating mechanism, a plugging mechanism and a control mechanism, a plug lower sleeve head used for being connected with a blowout prevention pipe is arranged below the plug body. A channel for a steel wire or a cable to pass through is arranged in the plug main body and the plug lower sleeve head; a plugging mechanism for plugging the channel and a heating mechanism for heating the plugging mechanism and the plug main body are arranged in the plug main body; the control mechanism is connected with the plugging mechanism and the heating mechanism. The invention relates to a blowout prevention pipe plug, and aims to solve the problems that a packing pressing cap on a conventional blowout prevention pipe plug needs to be manually screwed when in use and is easy to freeze to influence the lifting operation of a steel wire or a cable when in use in winter, so that the labor intensity of staff is increased, and the working efficiency of a test site is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield logging, in particular to an electric remote-controlled antifreeze plugging device for a blowout preventer used for logging. Background Art

[0002] During the logging process of oil and gas wells, in order to ensure the accuracy of logging pressure data and reduce environmental pollution caused by leakage of oil, gas, water, etc., the test well must be tested in a closed manner. The blowout preventer plug used in the closed test can control the external leakage of the test well. When the blowout preventer plug used in the test site overflows, manpower is required to tighten the packing cap on the plug, and the packing is compressed to achieve the sealing of the wire or cable during the lifting and lowering process. At the same time, during winter testing, when the wire or cable is stopped, it is easy for the wire or cable to freeze in the packing cap, affecting the lifting and lowering operation of the wire or cable. This not only increases the labor intensity of employees, but also reduces the work efficiency of the test site. Summary of the invention

[0003] The present invention proposes an electric remote-controlled anti-freezing plugging device for a well logging blowout preventer, so as to solve the problem that the existing blowout preventer plug needs manpower to tighten the packing pressure cap on the plug when in use, and is prone to freezing when used in winter, affecting the wire or cable raising and lowering operation, resulting in increased labor intensity of employees and reduced work efficiency at the test site.

[0004] According to one aspect of the present invention, there is provided an electric remote control antifreeze plugging device for a blowout preventer for logging, comprising: a plug body, a heating mechanism, a plugging mechanism and a control mechanism; A plug lower sleeve for connecting with the lubricant preventer is provided below the plug body; The plug body and the plug lower sleeve are provided with channels for passing steel wires or cables; The plug body is provided with the blocking mechanism for blocking the channel and the heating mechanism for heating the blocking mechanism and the plug body; The control mechanism is respectively connected to the sealing mechanism and the heating mechanism. The control mechanism is used to control the sealing mechanism to start sealing the inside of the plug body when it is detected that the real-time pressure in the blowout preventer is greater than a predetermined pressure, and / or to control the heating mechanism to start heating when it is detected that the external ambient temperature of the plug body is less than a predetermined temperature.

[0005] Preferably, the blocking mechanism comprises: packing, a rotating pressure cap and a driving mechanism; One end of the packing and the rotating pressure cap are located inside the channel, and the rotating pressure cap and the channel have thread structures that match each other; The rotating pressing cap is located above the packing, and the packing and the rotating pressing cap are provided with through holes for passing the steel wire and the cable; The rotating pressing cap located outside the plug body is connected to the driving mechanism, and the driving mechanism is used to drive the rotating pressing cap to move toward or away from the inside of the plug body.

[0006] Preferably, the driving mechanism comprises: a large gear, a small gear and a motor; The rotating pressing cap has a prismatic structure; The large gear is sleeved on the outside of the prismatic structure of the rotating pressure cap; The large gear meshes with the small gear, the small gear is connected to the output shaft of the motor, and the motor is connected to the control mechanism.

[0007] Preferably, the heating mechanism comprises: a heating porcelain tube and a battery; The heating porcelain tube is sleeved on the rotating pressure cap located outside the plug body, and the heating porcelain tube is connected to the battery through a line.

[0008] Preferably, it also includes: a heat preservation and sealing mechanism; The heat-insulating sealing mechanism cover is arranged outside the blocking mechanism and the heating mechanism, and the heat-insulating sealing mechanism is used to insulate the heat generated by the heating mechanism.

[0009] Preferably, the heat preservation mechanism comprises: a cover, a cover tube, a heat preservation base and a sealing ring; The heat-insulating base is sleeved above the step outside the plug body; The bottom end of the cover tube is connected to the heat preservation base, and the top end of the cover tube is connected to the cover; The cover is provided with a central hole for the top end of the rotating pressure cap and the cable or wire to pass through, and a sealing groove is provided in the central hole, and the sealing ring is installed inside the sealing groove.

[0010] Preferably, it also includes: a pulley, a pulley bracket and a pulley base; The plug body has a step on the outside, and one end of the pulley base is sleeved above the step on the outside of the plug body; The other end of the pulley base is provided with an eyelet, and the bottom end of the pulley bracket is inserted into and fixed inside the eyelet; The top end of the pulley bracket is a Y-shaped structure, and the pulley is rotatably fixed between the two arms of the Y-shaped structure through a bearing; A wire groove for placing the steel wire or cable is arranged outside the pulley.

[0011] Preferably, the control mechanism comprises: a controller, a remote controller, a temperature sensor and a pressure sensor; The controller is respectively connected to the remote controller, the blocking mechanism, the heating mechanism, the temperature sensor and the pressure sensor; The controller is used to control the temperature sensor to start detecting the external ambient temperature of the plug body and / or control the pressure sensor to start detecting the real-time pressure in the blowout preventer.

[0012] The present invention has at least the following beneficial effects: The present invention proposes an electric remote-controlled anti-freezing plugging device for a blowout preventer for well logging. By arranging a control mechanism and a plugging mechanism, automatic plugging or opening of a plug body can be achieved, thereby reducing the work intensity of employees and improving the work efficiency at the test site. By arranging a heating mechanism to automatically heat the plug body, freezing can be effectively prevented from occurring inside the plug body or on the packing pressure cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present invention and, together with the specification, are used to explain the technical solutions of the present invention.

[0014] Figure 1 A schematic structural diagram of an electrically controlled antifreeze plugging device for a blowout preventer for well logging according to an embodiment of the present invention is shown.

[0015] In the figure, 1-cover, 2-cover cylinder, 3-motor, 4-rotating pressure cap, 5-large gear, 6-insulation base, 8-pulley base, 9-packing, 10-plug body, 11-plug lower sleeve, 13-small gear, 14-motor fixing frame, 15-prismatic structure, 16-pulley bracket, 17-heating porcelain tube, 18-sealing ring, 19-pulley. Implementation

[0016] Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0017] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0018] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0019] In addition, in order to better illustrate the present invention, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present invention can be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present invention.

[0020] Figure 1 The schematic diagram of the structure of the electric remote control antifreeze plugging device for a well logging blowout preventer according to an embodiment of the present invention is shown. Figure 1 As shown, an electric remote-controlled anti-freeze plugging device for a blowout preventer for well logging comprises: a plug body 10, a heating mechanism, a plugging mechanism and a control mechanism; a plug lower sleeve 11 for connecting to the blowout preventer is arranged below the plug body 10; a channel for passing a steel wire or a cable is arranged inside the plug body 10 and the plug lower sleeve 11; the plug body 10 is provided with the plugging mechanism for plugging the channel and the heating mechanism for heating the plugging mechanism and the plug body 10; the control mechanism is connected to the plugging mechanism and the heating mechanism respectively, and the control mechanism is used to control the plugging mechanism to start plugging the inside of the plug body 10 when it is detected that the real-time pressure in the blowout preventer is greater than a predetermined pressure, and / or to control the heating mechanism to start heating when it is detected that the external ambient temperature of the plug body 10 is less than a predetermined temperature.

[0021] In the embodiment of the present invention, the main body of the plug body 10 is cylindrical, and the plug lower sleeve 11 is connected to the bottom end of the plug body 10 through threads.

[0022] During installation, the sealing mechanism is installed inside the plug body 10, and the top of the lower sleeve 11 of the plug is screwed into the lower end of the plug body 10 through a thread; the cable or steel wire used to lower the test instrument passes through the lower sleeve 11 of the plug and the channel of the plug body 10 respectively; the bottom end of the lower sleeve 11 of the plug is connected and fixed with the upper end of the blowout preventer through a threaded structure.

[0023] When in use, when the control mechanism detects that the real-time pressure in the blowout preventer is greater than the predetermined pressure, it indicates that the liquid in the blowout preventer may overflow in large quantities through the channel of the plug body 10 that accommodates the steel wire or cable; at this time, the control mechanism controls the plugging mechanism to start, and plugs the inside of the channel of the plug body 10 to prevent the leakage of well fluid from exceeding the predetermined requirement. When the control mechanism detects that the ambient temperature outside the plug body 10 is less than the predetermined temperature, such as 0 degrees, the heating mechanism is controlled to start, and the plug body 10 and the plugging mechanism are heated to prevent the cable or steel wire from freezing when there is residual liquid in the internal channel of the plug body 10 when the test is stopped, resulting in the inability to lower it when the test is stopped; at the same time, the plugging mechanism is prevented from being unable to start normally for plugging due to freezing.

[0024] In the present invention, the sealing mechanism includes: a packing 9, a rotating pressure cap 4 and a driving mechanism; one end of the packing 9 and the rotating pressure cap 4 are located inside the channel, and the rotating pressure cap 4 and the inside of the channel have a threaded structure that cooperates with each other; the rotating pressure cap 4 is located above the packing 9, and the packing 9 and the rotating pressure cap 4 are provided with through holes for allowing the steel wire and cable to pass through; the rotating pressure cap 4 located outside the plug body 10 is connected to the driving mechanism, and the driving mechanism is used to drive the rotating pressure cap 4 to move toward or away from the inside of the plug body 10.

[0025] In an embodiment of the present invention, the lower part of the rotary pressure cap 4 is rotated from the top of the plug body 10 into the interior of its channel through a matching threaded structure, the packing 9 is located between the lower sleeve 11 of the plug and the rotary pressure cap 4, and the driving mechanism is connected to the control mechanism.

[0026] During installation, first put the packing 9 into the channel of the plug body 10 from the lower end of the plug body 10, and screw the plug lower sleeve 11 into the plug body 10 from the lower end of the plug body 10 until it reaches the bottom of the step in the plug body 10. The bottom end of the rotating pressure cap 4 is then screwed into the plug body 10 from the upper end of the plug body 10 until it contacts the packing 9.

[0027] When the channel in the plug body 10 is blocked, the control mechanism controls the driving mechanism to start, driving the rotating pressure cap 4 to rotate clockwise along the axis. Since the rotating pressure cap 4 is threadedly connected to the inside of the channel of the plug body 10, the rotating pressure cap 4 gradually moves downward, that is, moves a predetermined distance in the direction of the packing 9; after the packing 9 is squeezed by the rotating pressure cap 4, the diameter of the hole through which the steel wire or cable passes is reduced, and the packing 9 gradually sticks to the outer wall of the steel wire or cable, so that the liquid in the channel below the packing 9 cannot pass, thereby achieving the purpose of blocking the plug body 10. Among them, when controlling the lowering of the steel wire or cable, it is necessary that the packing 9 and the cable and steel wire cannot be squeezed too tightly, which will cause it to be unable to be lowered. Therefore, it is necessary to limit the distance that the driving mechanism controls the rotating pressure cap 4 to move downward, that is, the value of the predetermined distance should not be too large. When it is necessary to open the channel of the plug body 10, the control mechanism controls the driving mechanism to start and drive the rotating pressure cap 4 to rotate counterclockwise, so that the rotating pressure cap 4 moves away from the packing 9, so that the packing 9 no longer presses the cable or steel wire tightly.

[0028] The plug body 10, the plug lower sleeve 11 and the rotary pressure cap 4 are all connected by a threaded structure, which can realize quick disassembly and assembly operations at any time; at the same time, the method of replacing the packing 9 is changed, the packing 9 cavity in the plug body 10 moves downward, and the lower plug sleeve 11 is threadedly connected at the lower end of the plug body 10. The original method of removing the plug pressure cap and then taking out the packing 9 from the upper end of the plug body 10 is changed to taking out the packing 9 from the lower end of the plug body 10, thereby eliminating the need to remove other parts of the plug, thereby improving the efficiency of replacing the packing 9.

[0029] In the present invention, the driving mechanism includes: a large gear 5, a small gear 13 and a motor 3; the rotating pressure cap 4 has a prismatic structure 15; the large gear 5 is sleeved on the outside of the prismatic structure 15 of the rotating pressure cap 4; the large gear 5 is meshed with the small gear 13, the small gear 13 is connected to the output shaft of the motor 3, and the motor 3 is connected to the control mechanism.

[0030] In the embodiment of the present invention, the motor 3 is connected to the control mechanism and the battery respectively. The outer wall of the rotating pressure cap 4 outside the plug body 10 has a hexagonal prism structure 15, and the inner shape of the large gear 5 matches the outer shape of the prism structure 15.

[0031] When plugging, the control mechanism controls the motor 3 to start, and its output shaft drives the pinion 13 to rotate, and the pinion 13 drives the large gear 5 to rotate through meshing, and the large gear 5 drives the rotating pressing cap 4 to rotate clockwise and downward to squeeze the packing 9 to achieve plugging by cooperating with the prismatic structure 15. When it is necessary to open the passage of the plug body 10, the control mechanism controls the motor 3 to start, and drives the rotating pressing cap 4 to rotate counterclockwise through the pinion 13 and the large gear 5, so that the rotating pressing cap 4 moves away from the packing 9, so that the passage of the plug body 10 is opened.

[0032] By controlling the start time of the motor 3 and the output shaft speed, the rotation number of the large gear 5 and the small gear 13 can be controlled to adjust the movement distance of the rotating pressure cap 4, that is, the purpose of the predetermined distance. Among them, the motor 3 can be an eccentric motor 3 with a torque of 60Kg·cm and a power of 14W.

[0033] Among them, the prismatic structure 15 of the rotating pressure cap 4 is also used for when the motor 3 cannot drive the rotating pressure cap 4 to move normally. By clamping the prismatic structure 15 with a wrench and rotating it, the rotating pressure cap 4 can be driven to move, thereby realizing manual blocking and opening of the channel of the plug body 10.

[0034] In the present invention, the heating mechanism includes: a heating porcelain tube 17 and a battery; the heating porcelain tube 17 is sleeved on the rotating pressure cap 4 outside the plug body 10, and the heating porcelain tube 17 is connected to the battery through a line.

[0035] In the embodiment of the present invention, the heating porcelain tube 17 is installed on the rotating pressure cap 4 near the top position. When the control mechanism detects that the ambient temperature is lower than 0°, the line between the control battery and the heating porcelain tube 17 is connected, and the heating porcelain tube 17 generates heat after being energized to heat the rotating pressure cap 4. At the same time, it is transmitted along the rotating pressure cap 4 to the plug body 10 and the large gear 5, the small gear 13, and the motor 3 connected and in contact with it, thereby effectively preventing the cable or steel wire from being frozen together with the plug body 10 and the rotating pressure cap 4 when there is well fluid inside the channel of the plug body 10 and the rotating pressure cap 4, resulting in the inability to lower the cable or steel wire normally; at the same time, it can prevent the motor 3 and the gear from freezing and being unable to be used normally due to the low temperature. Among them, the power supply voltage for the heating porcelain tube 17 is 12V.

[0036] In winter, when the outdoor temperature is -15±5℃, the 12V battery can work continuously for 5h-6h without insulation. The electric heating porcelain tube 17 is heated to a constant temperature of 50±1℃, the power cord can withstand a maximum rated current of 10A, and the power cord length of 20m can meet the length requirements of the construction pipe column.

[0037] The present invention further comprises: a heat-insulating sealing mechanism; the heat-insulating sealing mechanism cover is arranged outside the blocking mechanism and the heating mechanism, and the heat-insulating sealing mechanism is used to insulate the heat generated by the heating mechanism.

[0038] In the present invention, the insulation mechanism includes: a cover 1, a cover tube 2, an insulation base 6 and a sealing ring 18; the insulation base 6 is sleeved above the step outside the plug body 10; the bottom end of the cover tube 2 is connected to the insulation base 6, and the top end of the cover tube 2 is connected to the cover 1; the cover 1 is provided with a center hole for allowing the top end of the rotating pressure cap 4 and the cable or steel wire to pass through, and a sealing groove is provided in the center hole, and the sealing ring 18 is installed inside the sealing groove.

[0039] In the embodiment of the present invention, the cover 1, the cover tube 2 and the heat preservation base 6 are connected in sequence through threaded structures. A step is provided on the outside of the plug body 10 near the top, and the heat preservation base 6 is sleeved above the upper step of the plug body 10 and fixed by pins. The motor 3, the large gear 5, the small gear 13, the rotating pressure cap 4 on the outside of the plug body 10 and the heating porcelain tube 17 are all inside the cover tube 2, wherein the motor fixing frame 14 is installed on the heat preservation base 6 by screws, and the motor 3 is installed on the motor fixing frame 14. The top of the rotating pressure cap 4 is inserted into the center hole at the top of the cover 1.

[0040] The added cover tube 2, insulation base 6, cover cap 1 and sealer form a relatively closed hollow cylinder structure, and the bottom end of the cover tube 2 is connected to the hot porcelain tube by introducing a power line; the sealing ring 18 in the center hole on the top of the cover cap 1 can cover the heating porcelain tube 17 to prevent the sewage coming out of the top of the rotating pressure cap 4 from contacting the heating tube after the packing 9 in the plug body 10 leaks; the power line is insulated and waterproof sealed in the insulation cover, hanging from the top of the plug body 10 to the ground, and connected to the battery on the ground through a quick plug to achieve fast and flexible docking, and can be connected when the plug body 10 needs to be thawed, thereby extending the working time and service life of the battery.

[0041] The battery is powered by 12V DC, which does not pose a safety hazard and will not cause damage to personnel and equipment, thus ensuring construction safety; the power cord uses a two-core cable, and the electrical indicators (current, voltage, etc.) meet the requirements of DC power. The cover 1, the cover tube 2 and the insulation base 6 can isolate the influence of sewage, dirty oil, etc. on the heating porcelain tube 17 and the power cord. After waterproof insulation and sealing treatment, the short circuit caused by sewage is eliminated.

[0042] At the same time, the cover 1, the cover tube 2 and the heat preservation base 6 can play a heat preservation role, prevent the heat generated by the heating porcelain tube 17 from being lost too quickly, and reduce energy consumption. When maintenance, replacement of the rotating pressure cap 4, the motor 3, the gear, etc., or manual plugging or opening of the rotating pressure cap 4 are required, the cover 1 and the cover tube 2 can be quickly disassembled and installed through the threaded structure, so as to facilitate quick operation of the internal components.

[0043] The present invention also includes: a pulley 19, a pulley bracket 16 and a pulley base 8; the outside of the plug body 10 has a step, and one end of the pulley base 8 is sleeved above the step on the outside of the plug body 10; the other end of the pulley base 8 is provided with an eyelet, and the bottom end of the pulley bracket 16 is inserted into and fixed inside the eyelet; the top end of the pulley bracket 16 is a Y-shaped structure, and the pulley 19 is rotatably fixed between the two arms of the Y-shape through a bearing; the outside of the pulley 19 is provided with a wire groove for placing the steel wire or cable.

[0044] In the embodiment of the present invention, the pulley base 8 is located below the heat preservation base 6, and one end of the pulley base 8 is sleeved above the step in the middle of the plug body 10 and fixed by screws. The pulley bracket 16 is installed in another hole of the pulley base 8 and fixed by screws. The upper part of the pulley bracket 16 is a Y-shaped frame, and the pulley 19 is installed in the middle of the Y-shaped frame on the upper part of the pulley bracket 16 by bearings and screws, and the pulley 19 can rotate along the bearing.

[0045] The cable or steel wire passes through the rotating pressure cap 4 and the top of the cover 1 from the plug body 10, passes around the wire groove on the top of the pulley 19, and is connected to the winch used to lower the cable or steel wire, and the cable or steel wire is inside the wire groove. The pulley 19, the pulley bracket 16 and the pulley base 8 are used to lower or lift the cable or steel wire. The pulley 19 can rotate with the movement of the cable or steel wire. The curvature of the pulley 19 can support the cable or steel wire, and the rotation can reduce friction to prevent it from being damaged due to excessive bending and friction.

[0046] In the present invention, the control mechanism includes: a controller, a remote control, a temperature sensor and a pressure sensor; the controller is respectively connected to the remote control, the sealing mechanism, the heating mechanism, the temperature sensor and the pressure sensor; the controller is used to control the temperature sensor to start detecting the external ambient temperature of the plug body 10 and / or control the pressure sensor to start detecting the real-time pressure in the blowout preventer.

[0047] In the embodiment of the present invention, the controller and the remote controller are connected via a wireless transmission module. The controller includes a 10A relay, the remote control effective distance is 200 meters, and the relay is installed between the motor 3 and the power supply.

[0048] A command is sent to the relay via the remote control to control the motor 3 to start forward or reverse rotation, thereby driving the meshing gears to control the rotating pressure cap 4 to move up and down to tighten or loosen the packing 9; for example, when the rotating pressure cap 4 squeezes the packing 9 with a high pressure, the motor 3 is controlled to start forward rotation, driving the rotating pressure cap 4 to move away from the packing 9, so that the extrusion pressure on the contact surface between the packing 9 and the wire or cable in the plug body 10 decreases, and the passability of the wire or cable in the center hole of the rotating pressure cap 4 and the center hole of the packing 9 becomes better, thereby allowing the downhole instrument to drive the wire or cable downward; when the extrusion pressure of the packing 9 on the wire or cable becomes smaller and overflow occurs, the motor 3 is controlled to start reverse rotation to drive the rotating pressure cap 4 to squeeze the packing 9, thereby sealing the plug body 10.

[0049] In addition, by setting a predetermined pressure and a predetermined temperature value in the controller, the controller controls the temperature sensor and the pressure sensor to detect the ambient temperature and the real-time pressure in the blowout preventer in real time. When the ambient temperature is lower than the predetermined temperature, the heating porcelain tube 17 is automatically controlled to be energized for heating; when the real-time pressure of the liquid in the blowout preventer is greater than the predetermined pressure, the motor 3 is automatically controlled to start and the inside of the plug body 10 is sealed.

[0050] It can be understood that the above-mentioned various embodiments mentioned in the present invention can be combined with each other to form a combined embodiment without violating the principle logic. Due to space limitations, the present invention will not go into details.

[0051] The present invention overcomes the shortcomings of the prior art, can effectively control the extrusion force of the packing 9 in the plug body 10 on the steel wire or cable, and flexibly controls the packing 9 and the rotating pressure cap 4 in the blowout preventer plug body 10 by installing a set of driving gears on the rotating pressure cap 4 of the plug body 10, thereby greatly improving the control effect. At the same time, a controller and a remote controller are installed on the power supply circuit of the motor 3 to realize remote control and reduce the labor intensity of the operator. In the winter test process, in view of the problem that the blowout preventer plug is easy to freeze due to the low outdoor temperature in winter, a heating porcelain tube 17 is installed on the upper part of the rotating pressure cap 4 which is most likely to freeze, so as to prevent the rotating pressure cap 4 on the top end of the blowout preventer plug body 10 from freezing the steel wire or cable, thereby ensuring that the equipment can be quickly started and lowered at any time during the test, thereby improving the work efficiency at the test site.

[0052] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electric remote control antifreeze plugging device for a well logging blowout preventer, characterized in that: include: A plug body (10), a heating mechanism, a sealing mechanism, and a control mechanism; A plug lower sleeve (11) for connecting to the lubricant preventer is provided below the plug body (10); The plug body (10) and the plug lower sleeve (11) are provided with passages for passing steel wires or cables; The plug body (10) is provided with the blocking mechanism for blocking the channel, and the heating mechanism for heating the blocking mechanism and the plug body (10); The control mechanism is connected to the blocking mechanism and the heating mechanism respectively. The control mechanism is used to control the blocking mechanism to start blocking the inside of the plug body (10) when it detects that the real-time pressure in the blowout preventer is greater than a predetermined pressure, and / or to control the heating mechanism to start heating when it detects that the external ambient temperature of the plug body (10) is less than a predetermined temperature.

2. The electric remote control antifreeze plugging device for well logging blowout preventer according to claim 1 is characterized in that: The sealing mechanism comprises: a packing (9), a rotating pressure cap (4) and a driving mechanism; One end of the packing (9) and the rotating pressure cap (4) are located inside the channel, and the rotating pressure cap (4) and the inside of the channel have threaded structures that cooperate with each other; The rotating pressing cap (4) is located above the packing (9), and through holes for passing the steel wire and the cable are provided inside the packing (9) and the rotating pressing cap (4); The rotating pressing cap (4) located outside the plug body (10) is connected to the driving mechanism, and the driving mechanism is used to drive the rotating pressing cap (4) to move towards or away from the inside of the plug body (10).

3. The electric remote control antifreeze plugging device for well logging blowout preventer according to claim 2 is characterized in that: The driving mechanism comprises: a large gear (5), a small gear (13) and a motor (3); The rotating pressing cap (4) has a prismatic structure (15); The large gear (5) is sleeved on the outside of the prismatic structure (15) of the rotating pressing cap (4); The large gear (5) meshes with the small gear (13), the small gear (13) is connected to the output shaft of the motor (3), and the motor (3) is connected to the control mechanism.

4. The electric remote control antifreeze plugging device for well logging blowout preventer according to claim 2 is characterized in that: The heating mechanism comprises: a heating porcelain tube (17) and a battery; The heating porcelain tube (17) is sleeved on the rotating pressure cap (4) located outside the plug body (10), and the heating porcelain tube (17) is connected to the battery via a line.

5. The electric remote control antifreeze plugging device for well logging blowout preventer according to claim 2, characterized in that: Also includes: Thermal insulation sealing mechanism; The heat-insulating sealing mechanism cover is arranged outside the blocking mechanism and the heating mechanism, and the heat-insulating sealing mechanism is used to insulate the heat generated by the heating mechanism.

6. The electric remote control antifreeze plugging device for well logging blowout preventer according to claim 5, characterized in that: The heat preservation mechanism comprises: a cover (1), a cover tube (2), a heat preservation base (6) and a sealing ring (18); The heat-insulating base (6) is sleeved above the step outside the plug body (10); The bottom end of the cover cylinder (2) is connected to the heat-insulating base (6), and the top end of the cover cylinder (2) is connected to the cover cap (1); The cover (1) is provided with a central hole for allowing the top end of the rotating pressure cap (4) and a cable or a steel wire to pass through, and a sealing groove is provided in the central hole, and the sealing ring (18) is installed in the sealing groove.

7. The electric remote control antifreeze plugging device for well logging blowout preventer according to claim 1, characterized in that: Also includes: A pulley (19), a pulley bracket (16) and a pulley base (8); The plug body (10) has a step on the outside, and one end of the pulley base (8) is sleeved above the step on the outside of the plug body (10); The other end of the pulley base (8) is provided with an eyelet, and the bottom end of the pulley bracket (16) is inserted into and fixed inside the eyelet; The top end of the pulley bracket (16) is a Y-shaped structure, and the pulley (19) is rotatably fixed between two arms of the Y-shape via a bearing; The outside of the pulley (19) is provided with a wire groove for placing the steel wire or cable.

8. The electric remote control antifreeze plugging device for well logging blowout preventer according to any one of claims 1 to 7, characterized in that: The control mechanism includes: a controller, a remote controller, a temperature sensor and a pressure sensor; The controller is respectively connected to the remote controller, the blocking mechanism, the heating mechanism, the temperature sensor and the pressure sensor; The controller is used to control the temperature sensor to start detecting the external ambient temperature of the plug body (10) and / or control the pressure sensor to start detecting the real-time pressure in the lubricant preventer.

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