Remote control well cementation cement head and working method thereof
The design of remotely controlled cement head solves the problem of difficulty in judging the status of the stop pin, realizes the reliable downward movement of the rubber plug, improves the safety and efficiency of cementing operations, and is suitable for complex well conditions such as deep wells.
Patent Information
- Application Number
- CN202411033943.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2026-01-30
AI Technical Summary
During operation, it is difficult to determine whether the stop pin is open, which leads to uncertainty about the downward movement of the rubber plug, posing a safety hazard. Furthermore, it is inconvenient, inefficient, and risky to operate in complex well conditions.
Design a remote control cement head, including a stop pin drive mechanism, a position detection mechanism, a controller and a signal transceiver module, to realize remote control and position detection of the stop pin, and ensure the normal downward movement of the rubber plug.
Remote control of the cement head simplifies on-site operations, improves work efficiency, reduces risks, and ensures construction safety and continuity, making it suitable for complex well conditions such as deep wells.
Smart Images
Figure CN121429324A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of cementing equipment, and particularly relates to a remote control cementing head and a working method thereof. BACKGROUND
[0002] With the development of drilling technology from shallow wells to deep wells and ultra-deep wells, the cementing operation environment is more and more complex, the length of the cementing pipe string is longer and longer, the working pressure of the cementing head is gradually increased, the operation difficulty is also increased, and the danger of the construction personnel during the cementing operation is also greater and greater. The development of remote control and man-machine interaction and the use of new technologies and new equipment to realize the remote and automation of the cementing head operation during the cementing construction can fundamentally ensure the cementing quality and improve the production efficiency. Meanwhile, the further popularization of the rotating liner cementing technology and the top drive control technology needs the remote control cementing head with the rotating function to provide reliable guarantee.
[0003] In recent years, with the increasing normalization of drilling engineering, higher requirements are put forward for the quality and use of the cementing head. The cementing head as an important wellhead device is related to the efficiency and success of the cementing operation in terms of the rationality of the structure and the reliability of the quality. Many oilfields discard the simple cementing heads used in the past and turn to purchase standardized and normalized cementing heads. Many large oil machinery companies abroad such as HALLIBURTON, TIW and the like have cementing head series products with different characteristics. In China, Dezhou Continental Shelf Oil and Gas Technology Co., Ltd. has successfully developed DDS series casing cementing heads and ZSD series drill pipe cementing heads, which meet the needs of the cementing head for conventional cementing, double-stage cementing, double-plug cementing and continuous opening double-stage cementing.
[0004] At present, the cementing head is generally used in oilfields at home and abroad to realize cementing. If the stop pin cannot be opened and the rubber plug is not pressed down during the oilfield cementing operation, it will lead to the failure of the cementing or the accident of the cement plug left in the casing, especially during the cementing operation of the oil layer well completion. Once the accident of the cement plug left in the casing occurs, it will lead to the failure of the normal production of the oil well, and the cost of the later workover is expensive. At present, when the cementing head is used to replace the slurry, it is often difficult to effectively determine whether the stop pin is normally opened and whether the rubber plug is pressed down. Once the stop pin is not normally opened and leads to the ineffective downward movement of the rubber plug, it will cause a serious cementing accident. Therefore, the existing cementing head has the following deficiencies in the actual use process: it is difficult to determine whether the stop pin is opened, which further leads to the difficulty in determining whether the rubber plug is moved downward, and there is a safety hazard.
[0005] In addition, the conventional cement head relies on manual operation to complete cementing operation in complex well conditions and high-pressure environment, which brings the cementing problems of inconvenient operation, long operation time and low cementing efficiency; meanwhile, the cementing operation risks caused by the unsafe factors of excessive displacement pressure or excessively high cement head installation position. With the development of oil exploration and development towards deeper strata, the pressure grade of field operation is continuously improved, and safe operation is paid more and more attention, so it is an urgent need to provide a cementing cement head capable of remote control. SUMMARY
[0006] To solve the problems in the prior art, the purpose of the present application is to provide a remote control cementing cement head and a working method thereof, the remote control cementing cement head can remotely control the action of the stop pin to block or release the rubber plug, and can also judge whether the stop pin is normally opened, and further judge whether the rubber plug is normally down.
[0007] The technical scheme adopted by the present application is as follows:
[0008] A remote control cementing cement head, comprising a head body, a first nipple connected to the head body, a grouting port and a rubber plug down control mechanism arranged below the first nipple on the head body, an upper end of the head body being detachably connected with an upper cover, and a lower end of the head body being connected with a lower nipple.
[0009] The rubber plug down control mechanism comprises a stop pin, a push rod, a stop pin driving mechanism, a stop pin position detection mechanism, a controller and a signal transceiver module, the stop pin penetrates through the side wall of the head body and is sealed between the side wall of the head body, the stop pin driving mechanism is connected with one end of the stop pin and can drive the stop pin to move along the radial direction of the head body, the other end of the stop pin is connected with the push rod perpendicularly, the stop pin position detection mechanism is installed on the side wall of the head body and is used for detecting the position of the push rod, the stop pin position detection mechanism and the stop pin driving mechanism are connected with the controller, and the controller is connected with the signal transceiver module.
[0010] Preferably, the stop pin position detection mechanism comprises a mounting seat, a moving rod and a sensor, the mounting seat is fixedly connected with the head body, the mounting seat has a detection inner cavity therein, the middle part of the moving rod is provided with a large diameter section, the diameters of the parts of the moving rod located on both sides of the large diameter section are smaller than the diameter of the large diameter section, the large diameter section is connected with the detection inner cavity in a sliding and sealing manner; one end of the moving rod penetrates through the side wall of the head body and extends into the inner cavity of the head body, when the push rod moves to the side wall of the head body, the push rod can touch the end of the moving rod; the other end of the moving rod penetrates through the mounting seat and protrudes outside the mounting seat, the end of the moving rod is sleeved with a compression spring, one end of the compression spring abuts against the large diameter section, and the other end of the compression spring abuts against the mounting seat.
[0011] The sensor is arranged outside the mounting seat and is used for detecting the position of the end of the moving rod protruding from the mounting seat, and the sensor is connected with the controller.
[0012] Preferably, the sensor adopts a proximity switch or a pressure sensor, when the push rod moves to the side wall of the head body and touches the moving rod, the end of the moving rod exposed at one end of the mounting seat can trigger the proximity switch or the pressure sensor after the moving rod moves a preset distance.
[0013] Preferably, the mounting seat comprises a detection shell, a detection cylinder and an end plug, one end of the detection shell is fixedly connected with the head body, a mounting screw hole is arranged in the detection shell, an outer thread is arranged on the outer surface of the detection cylinder and matched with the mounting screw hole, the detection cylinder is threadedly connected with the detection shell, the inner cavity of the detection cylinder serves as the detection inner cavity, the moving rod is slidingly and sealingly connected between the large diameter section of the moving rod and the inner wall of the detection cylinder, the mouth of the detection cylinder is threadedly connected with the end plug, the end of the compression spring abuts against the end plug, and the two ends of the moving rod respectively penetrate the end plug and the bottom of the detection cylinder close to the head body.
[0014] Preferably, the moving rod and the end plug are gap-fitted, and the moving rod and the bottom of the detection cylinder close to the head body are gap-fitted.
[0015] Preferably, the stop pin driving mechanism comprises a control box, a motor, a rotating screw sleeve, a screw rod and a limiting rod, the control box is fixedly connected with the head body, one end of the screw rod is fixedly connected with the end of the stop pin located outside the head body, the rotating screw sleeve is threadedly connected with the screw rod, the rotating screw sleeve is further rotationally connected with the control box, a first gear is fixedly arranged on the outer ring of the rotating screw sleeve, the motor is installed in the control box, the output shaft of the motor is connected with a second gear, the second gear is engaged with the first gear, and the motor is connected with a controller; a limiting groove is arranged on the screw rod in the axial direction, one end of the limiting rod is fixedly connected with the control box, and the other end of the limiting rod extends into the limiting groove.
[0016] Preferably, the controller adopts a programmable logic controller.
[0017] Preferably, a second nipple is further arranged on the head body at a position opposite to the first nipple.
[0018] Preferably, the stop pin position detection mechanism is located below the stop pin driving mechanism.
[0019] The working method for remotely controlling the cementing head as described above comprises the following processes:
[0020] The preparation process comprises the following steps: separating the upper cover from the head body; driving the stop pin to move into the head body by the stop pin driving mechanism until the push rod exceeds the center of the head body or moves to the inner wall of the head body; then loading the rubber plug into the inner cavity of the head body, assembling the upper cover and the head body together, and connecting the lower nipple with the pipe string in the well.
[0021] The plug pressing process is as follows: when the plug pressing is performed, the signal transceiver module sends the received plug pressing instruction to the controller, the controller controls the latch driving mechanism to move outwardly from the head body, the position of the push rod is detected by the latch position detection mechanism during the movement of the latch, when the push rod is detected by the latch position detection mechanism to move to the inner wall of the head body, the controller controls the latch driving mechanism to stop driving the latch to move, and the controller sends a signal that the latch is opened through the signal transceiver module; and then the first joint injects the plug pressing liquid, and the plug pressing liquid presses the rubber plug into the well.
[0022] The present application has the following advantages:
[0023] In the remote control cementing head of the present application, the latch driving mechanism can drive the latch to move radially along the head body, so as to block or release the rubber plug, the end of the latch is connected with a push rod, and the latch position detection mechanism is further arranged, wherein the push rod can move synchronously with the latch, the position of the push rod is detected by the latch position detection mechanism, so as to determine the position of the latch, and the position of the latch is detected, and whether the latch is normally opened can be determined according to the position of the latch. In the present application, the controller can control the action of the latch driving mechanism, so as to drive the latch to move, and the position of the latch can be determined according to the detection signal of the latch position detection mechanism. The signal transceiver module can send the control instruction to the controller, so that the controller controls the action of the latch driving mechanism, so as to realize the remote control of the latch, and the controller can determine whether the latch is normally opened according to the position information of the push rod detected by the latch position detection mechanism, and the signal transceiver module can upload the information whether the latch is normally opened. In summary, the remote control cementing head of the present application can remotely control the action of the latch, so as to block or release the rubber plug, and whether the latch is normally opened can be determined, so as to determine whether the rubber plug is normally lowered. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0025] Figure 1 The structure diagram of the remote control cementing head of the present application;
[0026] Figure 2 The structure diagram of the latch driving mechanism in the embodiment of the present application;
[0027] Figure 3 The connection diagram of the motor and the rotary sleeve in the embodiment of the present application;
[0028] Figure 4 Structure diagram of the stop pin position detection mechanism in the embodiment of the present application;
[0029] Fig. 1 is a head body; 11 is a working cavity; 12 is a first joint; 13 is a second joint; 4 is a lower joint; 6 is a grouting port; 7 is a stop pin mechanism; 71 is a control box; 742 is a rotating screw sleeve; 7421 is a first gear; 743 is a limiting rod; 73 is a motor; 731 is a second gear; 75 is a screw rod; 751 is a limiting groove; 76 is a stop pin; 77 is a push rod; 78 is a PLC; 79 is a signal transceiver module; 8 is a stop pin position detection mechanism; 81 is a detection shell; 82 is a moving rod, 821 is a large-diameter section; 83 is a detection cylinder; 84 is a detection inner cavity; 85 is a compression spring; 86 is a mounting screw hole; 87 is an internal thread; 88 is a sealing groove; 89 is an end plug; 9 is a rubber plug. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical scheme and beneficial technical effects of the present application clearer and more understandable, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described in the present specification are only for the purpose of explaining the present application, and are not intended to limit the present application.
[0031] Reference Figure 1 , the remote control cementing head of the present application comprises a head body 1, a first joint 2 connected to the head body 1, a grouting port 6 and a rubber plug downward control mechanism provided below the first joint 2 on the head body 1, and an upper cover (the upper cover is not shown in the drawings) detachably connected to the upper end of the head body 1. Figure 1 The lower end of the head body 1 is connected to a lower joint 4 which can be connected to a pipe string in a well. Figure 2 The rubber plug downward control mechanism comprises a stop pin 76, a push rod 77, a stop pin driving mechanism, a stop pin position detection mechanism, a controller and a signal transceiver module. Figure 1 The stop pin 76 penetrates through the side wall of the head body 1 and is sealed between the stop pin 76 and the side wall of the head body 1. Figure 2 The stop pin driving mechanism is connected to one end (i.e. the left end as shown in Figure 1 and Figure 2 ) of the stop pin 76 and can drive the stop pin 76 to move radially along the head body 1. The other end (i.e. the right end as shown in and
[0032] ) of the stop pin 76 is connected perpendicularly to the push rod 77. The stop pin position detection mechanism is installed on the side wall of the head body 1 and is used to detect the position of the push rod 77. The stop pin position detection mechanism and the stop pin driving mechanism are both connected to the controller. The controller is connected to the signal transceiver module.
[0033] Preparation process: the upper cover is separated from the head body 1; the stop pin 76 is driven by the stop pin driving mechanism to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the stop pin 76 is driven by the stop pin driving mechanism to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head body 1 (i.e. to the right (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move out of the head body 1 (i.e. to the left (see the arrow in the figure)); the rubber plug is driven by the push rod 77 to move into the head bodyFigure 1 ) until the push rod 77 exceeds the center of the head body 1 or moves to the inner wall of the head body 1 (the inner wall refers to the right inner wall of the head body 1), then the rubber plug 9 is loaded into the inner cavity of the head body 1, at this time the lower end of the rubber plug 9 is in contact with the upper side of the stop pin 76 and is blocked by the stop pin 76, the upper end of the rubber plug 9 is below the first by joint 2, and then the upper cover is assembled with the head body 1; then the lower joint 4 is connected with the well pipe column;
[0034] The plug pressing process: when pressing the plug, the signal transceiver module sends the received plug pressing instruction to the controller, and the controller controls the stop pin driving mechanism to move outward (i.e. to the left (see Figure 1 )) of the head body 1, during the movement of the stop pin 76, the position of the push rod 77 is detected by the stop pin position detection mechanism, when the stop pin position detection mechanism detects that the push rod 77 moves to the inner wall of the head body 1 (the inner wall refers to the left inner wall of the head body 1), the controller controls the stop pin driving mechanism to stop driving the stop pin 76 to move, at this time the stop pin 76 and the push rod 77 are both located at the leftmost side, providing space for the falling of the rubber plug 9, at this time it is considered that the stop pin 76 is normally opened, and the controller sends a signal that the stop pin has been opened through the signal transceiver module; then the first by joint 2 injects the plug pressing liquid, and the plug pressing liquid presses the rubber plug 9 downward into the well.
[0035] As a preferred embodiment of the present application, the stop pin position detection mechanism of the present application can adopt the following structure, referring to Figure 4 , the stop pin position detection mechanism comprises a mounting seat, a moving rod 82 and a sensor, the mounting seat is fixedly connected with the head body 1, and the mounting seat has a detection cavity 84 therein, the middle part of the moving rod 82 is provided with a large diameter section 821, the parts of the moving rod 82 located on both sides of the large diameter section 821 have diameters smaller than that of the large diameter section 821, the large diameter section 821 is in sliding and sealing connection with the detection cavity 84, that is, the moving rod 82 can slide left and right along the detection cavity 84, and meanwhile the outer wall of the large diameter section 821 is sealed with the surface of the detection cavity 84, this sealing structure can prevent the fluid in the head body 1 from leaking out, thereby causing the pressure relief in the head body 1; combined with Figure 1The right end of the moving rod 82 penetrates the side wall of the head body 1 and extends into the inner cavity of the head body 1, when the push rod 77 moves to the left side wall of the head body 1, the push rod 77 can touch the right end of the moving rod 82, in addition, the diameter of the moving rod 82 on the right side of the large diameter section 821 is as small as possible, so as to prevent the pressure fluid in the head body 1 from pushing the moving rod 82 and causing signal misjudgment, the diameter of this section can be calculated according to the fluid pressure in the head body 1 and the elastic coefficient of the compression spring 85, and can be set according to the specific situation, which is not specifically limited in the application; the left end of the moving rod 82 penetrates the mounting seat and is exposed outside the mounting seat, the left end of the moving rod 82 is sleeved with the compression spring 85, the compression spring 85 is in the detection inner cavity 84, the right end of the compression spring 85 abuts against the large diameter section 821, and the left end of the compression spring 85 abuts against the mounting seat; the sensor is arranged outside the mounting seat and is used for detecting the position of the end exposed to one end of the mounting seat of the moving rod 82, and the sensor is connected with the controller. When the push rod 77 touches the right end of the moving rod 82, the moving rod 82 moves to the left by a distance and makes the compression spring 85 be further compressed, and then the right end of the moving rod 82 is detected by the sensor, at this time, after the controller receives the signal of the sensor, the controller controls the stop of the gear pin driving mechanism, at this time, the gear pin 76 stops moving. When the gear pin 76 needs to block the rubber plug 9, the gear pin driving mechanism drives the gear pin 76 to move to the right, at this time, due to the restoring force of the compression spring 85, the moving rod 82 moves to the right, until the right end face of the large diameter section 821 abuts against the inner wall of the mounting seat, so that the moving rod 82 stops moving, so that the reset of the moving rod 82 is realized.
[0036] As an optional embodiment of the above-mentioned scheme of the application, the above-mentioned sensor of the application can adopt a proximity switch or a pressure sensor, when the push rod 77 moves to the side wall of the head body 1 and touches the moving rod 82, the end exposed to one end (i.e. the left end of the moving rod 82) of the mounting seat of the moving rod 82 can trigger the proximity switch or the pressure sensor after the moving rod 82 moves by a preset distance. When the end of the left end of the moving rod 82 triggers the proximity switch or the pressure sensor, both the two sensors will have signal mutation, by setting a signal threshold, when the controller detects that the signals of the two sensors exceed the threshold, the gear pin driving mechanism is immediately controlled to stop driving the gear pin 76.
[0037] As an optional embodiment of the above-mentioned scheme of the application, the above-mentioned mounting seat of the application can adopt the following structure, referring to Figure 4 and combining Figure 1The mounting seat specifically comprises a detection shell 81, a detection cylinder 83 and an end plug 89, the right end of the detection shell 81 is fixedly connected with the head body 1, a mounting screw hole 86 is arranged in the detection shell 81, an outer thread is arranged on the outer surface of the detection cylinder 83 and matched with the mounting screw hole 86, the detection cylinder 83 is threadedly and matchingly connected with the detection shell 81, the inner cavity of the detection cylinder 83 serves as the detection inner cavity 84, the large-diameter section 821 of the moving rod 82 is slidingly and sealingly connected between the inner wall of the detection cylinder 83, the mouth of the detection cylinder 83 is threadedly connected with the end plug 89, the end of the compression spring 85 abuts against the end plug 89, and the two ends of the moving rod 82 respectively penetrate through the end plug 89 and the bottom of the right side of the detection cylinder 83. The mounting seat with the above structure is detachable, which is convenient for machining and later maintenance and repair.
[0038] As a preferred embodiment of the above scheme of the application, the moving rod 82 and the end plug 89 are gap-fitted, and the moving rod 82 and the bottom of the right side of the detection cylinder 83 are gap-fitted. The gap-fitting at the two places can prevent impurities from entering the gap to some extent, ensure smooth movement of the moving rod 82, and further ensure the accuracy of the position detection of the latch pin 76. In addition, sealing structures can be additionally arranged at the two places to further improve the above effect.
[0039] As a preferred embodiment of the application, the latch pin driving mechanism can adopt the structure as shown in Figure 2 and Figure 3 , and in combination with Figure 1 , the latch pin driving mechanism comprises a control box 71, a motor 73, a rotating screw sleeve 742, a screw rod 75 and a limiting rod 743, the control box 71 is fixedly connected with the head body 1, the right end of the screw rod 75 is fixedly connected with the left end of the latch pin 76, wherein the left end of the latch pin 76 is always located outside the head body 1 and sealingly connected with the hole provided on the head body 1 for the latch pin 76 to pass through, so that the liquid in the head body 1 can be prevented from entering the control box 71, the rotating screw sleeve 742 is threadedly and matchingly connected with the screw rod 75, and the rotating screw sleeve 742 is further rotationally connected with the control box 71, as shown in Figure 3The outer ring of the rotating screw sleeve 742 is fixedly provided with a first gear 7421, a motor 73 is installed in the control box 71, the output shaft of the motor 73 is connected with a second gear 731, the second gear 731 is engaged with the first gear 7421, and the motor 73 is connected with a controller; a limiting groove 751 is formed in the screw rod 75 along the axial direction thereof, one end of a limiting rod 743 is fixedly connected with the control box 71, and the other end of the limiting rod 743 extends into the limiting groove 751. When the above-mentioned structure of the latch pin driving mechanism works, the motor 73 drives the second gear 731 to rotate, the second gear 731 drives the first gear 7421 to rotate, and then the whole rotating screw sleeve 742 rotates; when the rotating screw sleeve 742 rotates, the limiting rod 743 can prevent the screw rod 75 from rotating around the axial direction thereof, so that the screw rod 75 can move along the axial direction of the rotating screw sleeve 742 when the rotating screw sleeve 742 rotates, thereby realizing the radial movement of the latch pin 76 along the head body 1.
[0040] As an optional embodiment of the present application, the controller adopts a programmable logic controller (PLC), and the latch pin position detection mechanism is located below the latch pin driving mechanism, so that the end of the push rod 77 faces downward, facilitating the falling of the rubber plug 9.
[0041] As the above-mentioned optional embodiment of the present application, the head body 1 is further provided with a second nipple joint 13 at a position opposite to the first nipple joint 2. The second nipple joint 13 can be used as a backup of the first nipple joint 2, and on the other hand, the first nipple joint 2 and the second nipple joint 13 can be used to circulate and clean the head body 1.
[0042] The head body 1 and the lower joint 4 of the present application can be connected in a rotating and sealing connection mode, which can improve the flexibility of the whole cement head installation.
[0043] As can be seen from the above-mentioned scheme of the present application, the remote control cementing cement head has the following characteristics:
[0044] ①The on-site operation is simple, instructions can be sent to the signal transceiver module to remotely and automatically control the process of releasing the rubber plug and detecting whether the latch pin is normally opened, thereby ensuring the reliability and continuity of the cementing construction, improving the cementing operation efficiency, and reducing the operation cost; ②The cementing construction can be remotely controlled, so that the personnel can be away from the drilling platform during the operation, the rubber plug can be released through the remote control system in the control room, time is saved, and the construction risk is reduced, and the cementing construction of complex well conditions such as deep wells and ultra-deep wells is especially suitable; ③The safety of the construction personnel can be maximally guaranteed when the on-site construction pressure is high, and the operation safety is improved; ④The latch pin position detection mechanism can detect whether the rubber plug is released, and the corresponding maintenance action can be taken in time when the rubber plug is not released.
[0045] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A remotely controlled cement head, characterized in that, The application relates to a glue injection device, which comprises a head body (1), a first joint (2) connected to the head body (1), a glue injection port (6) and a glue plug descending control mechanism arranged below the first joint (2) on the head body (1), and a detachable upper cover connected to the upper end of the head body (1), wherein the lower end of the head body (1) is connected with a lower joint (4). The glue plug descending control mechanism comprises a latch pin (76), a push rod (77), a latch pin driving mechanism, a latch pin position detection mechanism, a controller and a signal transceiver module, the latch pin (76) penetrates through the side wall of the head body (1) and is sealed with the side wall of the head body (1), the latch pin driving mechanism is connected with one end of the latch pin (76) and can drive the latch pin (76) to move along the radial direction of the head body (1), the other end of the latch pin (76) is connected with the push rod (77) perpendicularly, the latch pin position detection mechanism is installed on the side wall of the head body (1) and is used for detecting the position of the push rod (77), the latch pin position detection mechanism and the latch pin driving mechanism are connected with the controller, and the controller is connected with the signal transceiver module.
2. A remotely controlled cement head according to claim 1, characterized in that The latch pin position detection mechanism comprises a mounting seat, a moving rod (82) and a sensor, the mounting seat is fixedly connected with the head body (1), the mounting seat is provided with a detection inner cavity (84), the middle part of the moving rod (82) is provided with a large-diameter section (821), the diameters of the parts of the moving rod (82) located on the two sides of the large-diameter section (821) are smaller than the diameter of the large-diameter section (821), the large-diameter section (821) is connected with the detection inner cavity (84) in a sliding and sealing mode, one end of the moving rod (82) penetrates through the side wall of the head body (1) and extends into the inner cavity of the head body (1), when the push rod (77) moves to the side wall of the head body (1), the push rod (77) can touch the end of the moving rod (82), the other end of the moving rod (82) penetrates through the mounting seat and is exposed outside the mounting seat, the end of the moving rod (82) is provided with a compression spring (85), one end of the compression spring (85) abuts against the large-diameter section (821), and the other end of the compression spring (85) abuts against the mounting seat. The sensor is arranged outside the mounting seat and is used for detecting the position of the end exposed outside the mounting seat, and the sensor is connected with the controller.
3. A remotely controlled cement head according to claim 2, wherein, The sensor is a proximity switch or a pressure sensor, when the push rod (77) moves to the side wall of the head body (1) and touches the moving rod (82), and the moving rod (82) moves a preset distance, the end exposed outside the mounting seat can trigger the proximity switch or the pressure sensor.
4. A remotely controlled cement head according to claim 2, wherein, The mounting seat comprises a detection shell (81), a detection cylinder (83) and an end plug (89), one end of the detection shell (81) is fixedly connected with the head body (1), a mounting screw hole (86) is arranged in the detection shell (81), an outer thread is arranged on the outer surface of the detection cylinder (83) and matched with the mounting screw hole (86), the detection cylinder (83) is threadedly connected with the detection shell (81), the inner cavity of the detection cylinder (83) is the detection inner cavity (84), the large-diameter section (821) of the moving rod (82) is slidingly and sealingly connected between the inner wall of the detection cylinder (83), the mouth of the detection cylinder (83) is threadedly connected with the end plug (89), the end of the compression spring (85) abuts against the end plug (89), and the two ends of the moving rod (82) respectively penetrate through the end plug (89) and the bottom of the detection cylinder (83) close to the head body (1).
5. A remotely controlled cement head according to claim 4, wherein, The moving rod (82) and the end plug (89) are gap-connected, and the moving rod (82) and the bottom of the detection cylinder (83) close to the head body (1) are gap-connected.
6. A remotely controlled cement head according to claim 1, wherein, The stop pin driving mechanism comprises a control box (71), a motor (73), a rotating screw sleeve (742), a screw rod (75) and a limiting rod (743), the control box (71) is fixedly connected with the head body (1), one end of the screw rod (75) is fixedly connected with the end of the stop pin (76) located outside the head body (1), the rotating screw sleeve (742) is threadedly connected with the screw rod (75), the rotating screw sleeve (742) is further rotationally connected with the control box (71), the outer ring of the rotating screw sleeve (742) is fixedly sleeved with a first gear (7421), the motor (73) is installed in the control box (71), the output shaft of the motor (73) is connected with a second gear (731), the second gear (731) is engaged with the first gear (7421), and the motor (73) is connected with a controller; the limiting groove (751) is arranged on the screw rod (75) in the axial direction, one end of the limiting rod (743) is fixedly connected with the control box (71), and the other end of the limiting rod (743) extends into the limiting groove (751).
7. A remotely controlled cement head according to claim 1, wherein, The controller is a programmable logic controller.
8. A remotely controlled cement head according to claim 1, wherein, The head body (1) is further provided with a second nipple (13) at a position opposite to the first nipple (2).
9. A remotely controlled cement head according to claim 1, wherein, The stop pin position detection mechanism is located below the stop pin driving mechanism.
10. The method of remotely controlling the operation of a cement head according to any one of claims 1 to 9, characterized in that, The method comprises the following processes: Preparation process: the upper cover and the head body (1) are separated; the stop pin (76) is driven by the stop pin driving mechanism to move into the head body (1) until the push rod (77) exceeds the center of the head body (1) or moves to the inner wall of the head body (1); then the rubber plug (9) is loaded into the inner cavity of the head body (1), and then the upper cover and the head body (1) are assembled together; then the lower nipple (4) is connected with the pipe column in the well; Preparation process: the upper cover and the head body (1) are separated; the stop pin (76) is driven by the stop pin driving mechanism to move into the head body (1) until the push rod (77) exceeds the center of the head body (1) or moves to the inner wall of the head body (1); then the rubber plug (9) is loaded into the inner cavity of the head body (1), and then the upper cover and the head body (1) are assembled together; then the lower nipple (4) is connected with the pipe column in the well; The plug process: when the plug is carried out, the signal transceiver module sends the received plug command to the controller, the controller controls the range pin driving mechanism to move outwardly from the head body (1), during the movement of the range pin (76), the position of the push rod (77) is detected by the range pin position detection mechanism, when the range pin position detection mechanism detects that the push rod (77) moves to the inner wall of the head body (1), the controller controls the range pin driving mechanism to stop driving the range pin (76) to move, and the controller sends a signal that the range pin has been opened through the signal transceiver module; then the first by joint (2) injects the plug liquid, and the plug liquid presses the rubber plug (9) into the well.