A Christmas tree wellhead device

Abstract

The present invention belongs to the technical field of oil production wellhead devices, and specifically relates to an oil production tree wellhead device, which includes a gate valve, and a protective assembly installed on the gate valve; the protective assembly includes an electric drive, a housing, a hand lever, an adapter sleeve, a shaft sleeve, a rotating sleeve, a rotating shaft, a take-up roller, and an electromagnetic suction cup. The present invention generates a speed difference between the shaft sleeve and the built-in rotating shaft during the process of the electric drive driving the shaft sleeve to rotate, and utilizes the speed difference between the two to achieve the operation of disconnecting the rotating sleeve from the adapter sleeve. If the operator accidentally turns the hand lever at this time, the hand lever will not physically interfere with the output shaft of the electric drive, thereby avoiding damage due to physical interference between the electric drive and the hand lever; at the same time, the speed-increasing motion of the built-in rotating shaft can further accelerate the disconnection speed of the adapter sleeve and the rotating sleeve, so that the adapter sleeve and the rotating sleeve can be disconnected at the beginning of the operation of the electric drive, further reducing the probability of physical interference between the hand lever and the electric drive.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production wellhead devices, and in particular relates to a Christmas tree wellhead device. Background Art

[0002] The wellhead assembly is a critical piece of equipment in the oil production process. Its primary function is to control, distribute, and monitor the safety of oil and gas wells. It typically consists of two components: the Christmas tree assembly and the tubing head assembly. The Christmas tree assembly, the primary component controlling oil and gas well production, consists of an upper flange, four gate valves, a hydraulic safety valve, and a small cross-piece. The tubing head assembly, consisting of the tubing head body and tubing hanger, is used to suspend the tubing string and seal the annular space between the tubing and casing.

[0003] Gate valves are typically equipped with electric actuators to precisely control the flow rate at each outlet of the four-way pipe, reducing potential leaks. To enhance the safety of the Christmas tree assembly, a hand lever is installed on the valve body. This ensures that, in the event of a hydraulic safety valve failure, the combination valve can be manually operated to ensure final closure of the gas wellhead, preventing well control accidents. However, if the electric actuator is operating, accidentally turning the hand lever can cause physical interference between the hand lever and the actuator's output shaft, preventing proper valve rotation and potentially damaging the hand lever or the actuator's output.

[0004] To address the above technical issues, the applicant identified some prior art. For example, patent publication number CN119244195A describes a device that primarily rotates a connecting shaft driven by a driver. This rotation drives a synchronous rotation of a transmission post on a transmission ring. When the post contacts a steel rope, it twists the rope, causing the transmission sleeve to move toward the connecting shaft, disengaging the sleeve from the handle and preventing accidental rotation of the handle during operation.

[0005] However, when the driver drives the connecting shaft to rotate, the transmission column drives the steel rope to twist, the arc spring on one side of the transmission column is compressed, and the arc spring on the other side of the transmission column is stretched; when the driver stops working, the connecting shaft stops rotating, and the arc spring rebounds and drives the connecting shaft to continue rotating, causing the transmission column to continue twisting the steel rope, and the transmission sleeve cannot be reset, resulting in the hand lever being in a disconnected state. If the electric driver fails at this time, the valve cannot be closed by the hand lever, which leads to an accident. Summary of the Invention

[0006] The purpose of the present invention is to provide a Christmas tree wellhead device to address the deficiencies of the prior art and to solve the technical problems in the prior art.

[0007] The objectives of the present invention can be achieved by the following technical solutions: a Christmas tree wellhead device, comprising a four-way pipe, gate valves are respectively installed at interfaces on both sides of the four-way pipe, a protection assembly is installed on the gate valve, the gate valve is connected to a throttle valve and an instrument flange, a seismic pressure gauge is installed on the instrument flange, the four-way pipe is connected to an upper flange through a hydraulic safety valve, the upper flange is bolted to a casing head body, a casing hanger assembly is installed in the casing head body, and threaded flanges and a square right-angle stop valve are respectively connected on both sides of the casing head body through gate valves;

[0008] The protection component includes an electric drive, a box body is fixedly installed on the electric drive, a hand lever is rotatably installed on the box body, an adapter sleeve is rotatably installed in the box body, the hand lever is transmission-connected to the adapter sleeve, a shaft sleeve is rotatably installed on the box body, the shaft sleeve is connected to the electric drive, a rotating sleeve is fixedly installed on the shaft sleeve, and the rotating sleeve is rotatably connected to the adapter sleeve; a built-in rotating shaft is rotatably installed in the shaft sleeve, a take-up roller is installed in the rotating sleeve, an electromagnetic suction cup is fixedly installed in the take-up roller, a transverse slide groove is provided at one end of the built-in rotating shaft close to the take-up roller, and a transverse transmission block is slidably installed inside the transverse slide groove;

[0009] The take-up roller is connected to the built-in rotating shaft by attracting the horizontal transmission block through the electromagnetic suction cup; the take-up roller is connected to the slide plate through a pull rope, and the longitudinal transmission block is installed on the slide plate. The longitudinal transmission block is inserted into the short-distance transmission groove on the adapter sleeve to achieve transmission connection between the rotating sleeve and the adapter sleeve.

[0010] As a further optimization or improvement of this solution, an inner gear ring is fixedly installed inside the box, planetary gears are installed on the shaft sleeve, and a center gear is installed on the built-in rotating shaft, and the planetary gears are respectively engaged with the center gear and the inner gear ring.

[0011] As a further optimization or improvement of this solution, a transmission head is installed on the hand rod, a wide-pitch transmission groove is provided on the adapter sleeve, the transmission head slides in the wide-pitch transmission groove, and the hand rod is matched with the adapter sleeve through the transmission head.

[0012] As a further optimization or improvement of this solution, a longitudinal groove is provided on the inner wall of the rotating sleeve, the slide slides in the longitudinal groove, the slide is connected to the inner wall of the longitudinal groove through a longitudinal spring, and the longitudinal transmission block is slidably connected to the rotating sleeve.

[0013] As a further optimization or improvement of this solution, a damping ring is installed on the take-up roller, and the take-up roller is connected to the pull rope through the damping ring.

[0014] As a further optimization or improvement of this solution, the transverse transmission block is connected to the inner wall of the transverse slide through a transverse spring; when the electromagnetic suction cup is started, the electromagnetic suction cup adsorbs the transverse transmission block, and at this time the built-in rotating shaft is connected to the take-up roller through the transverse transmission block; when the electromagnetic suction cup is disconnected, the transverse transmission block enters the transverse slide under the action of the transverse spring, and at this time the built-in rotating shaft is disconnected from the take-up roller.

[0015] As a further optimization or improvement of this solution, an insert block is installed on the hand lever, and a slot is opened on the transverse transmission block; by pushing the hand lever, the insert block passes through the rotating sleeve and the electromagnetic suction cup and is inserted into the slot, so that the hand lever is directly connected to the built-in rotating shaft.

[0016] Beneficial effects of the present invention:

[0017] (1) The present invention forms a planetary gear set by means of a central gear, a planetary gear and an internal gear ring, so that a speed difference is generated between the shaft sleeve and the internal rotating shaft during the process of the shaft sleeve being driven by the electric drive. The speed difference between the two is used to disconnect the rotating sleeve from the adapter sleeve. If the operator accidentally turns the hand lever at this time, the hand lever will not physically interfere with the output shaft of the electric drive, thus avoiding damage due to physical interference between the electric drive and the hand lever.

[0018] At the same time, the built-in shaft speed-increasing motion can further accelerate the disconnection speed between the adapter sleeve and the rotating sleeve, so that the adapter sleeve and the rotating sleeve can be disconnected at the beginning of the operation of the electric drive, further reducing the probability of physical interference between the hand lever and the electric drive.

[0019] (2) When the electric drive fails, the gate valve needs to be closed urgently by the hand lever, the power supply of the electromagnetic suction cup is disconnected, the internal rotating shaft is disconnected from the take-up roller, and the longitudinal transmission block is inserted into the short-distance transmission groove on the adapter sleeve under the action of the longitudinal spring rebound, thereby connecting the adapter sleeve and the rotating sleeve. When the hand lever is turned, the hand lever drives the rotating sleeve and the shaft sleeve to rotate through the adapter sleeve, thereby realizing the emergency closing operation of the gate valve and reducing the probability of accidents.

[0020] (3) When the electric drive fails, the hand lever is pushed to allow the insert to penetrate the rotating sleeve and the electromagnetic suction cup into the slot, so that the hand lever is directly connected to the built-in rotating shaft. The hand lever drives the built-in rotating shaft to drive the sleeve to rotate and close the gate valve urgently. In this process, according to the characteristics of the planetary gear set, when the built-in rotating shaft is the active component, the built-in rotating shaft drives the sleeve to decelerate, thereby increasing the output torque of the sleeve and achieving a labor-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the connection structure between the gate valve and the electric drive.

[0024] Figure 3 This is a schematic diagram of the connection structure between the hand lever and the box body.

[0025] Figure 4 Schematic diagram of the internal structure of the box.

[0026] Figure 5 To protect the overall structure of the component cross-section.

[0027] Figure 6 It is a schematic diagram of the transmission connection between the hand lever and the adapter sleeve.

[0028] Figure 7 for Figure 5 A magnified view of the structure of part A.

[0029] Figure 8 Schematic diagram of the connection structure between the inner gear ring and the planetary gear.

[0030] Figure 9 Schematic diagram of the connection structure between the mid-mounted gear and the planetary gear.

[0031] Figure 10 for Figure 5 A magnified view of the structure of part B.

[0032] Figure 11 for Figure 5 A magnified view of the C-site structure.

[0033] Figure 12 It is a schematic diagram of the connection structure between the adapter sleeve and the rotating sleeve.

[0034] Figure 13 It is a schematic diagram of the connection structure between the longitudinal transmission block and the short-distance transmission groove.

[0035] Figure 14 This is a schematic diagram of the insert installation position.

[0036] Figure 15 for Figure 14 A magnified view of the D part structure.

[0037] The following are marked in the figure: 1. Throttle valve; 2. Gate valve; 3. Cross pipe; 4. Instrument flange; 5. Anti-seismic pressure gauge; 6. Hydraulic safety valve; 7. Protection assembly; 701. Electric drive; 702. Box; 703. Hand lever; 704. Bushing; 705. Adapter sleeve; 706. Transmission head; 707. Wide-spaced transmission groove; 708. Built-in rotating shaft; 709. Center gear; 710. Planetary gear; 711. Internal gear ring; 712. Rotating sleeve; 713. Vertical Transmission block; 714, slide plate; 715, longitudinal slide; 716, longitudinal spring; 717, pull rope; 718, damping ring; 719, take-up roller; 720, electromagnetic suction cup; 721, transverse transmission block; 722, transverse slide; 723, transverse spring; 724, plug block; 725, slot; 726, short-distance transmission groove; 8, upper flange; 9, casing head body; 10, casing hanger assembly; 11, threaded flange; 12, square right-angle stop valve. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] See also Figures 1-13 , a Christmas tree wellhead device, which includes a four-way pipe 3, gate valves 2 are installed on the interfaces on both sides of the four-way pipe 3, a protection component 7 is installed on the gate valve 2, the gate valve 2 is connected to the throttle valve 1 and the instrument flange 4, and a seismic pressure gauge 5 is installed on the instrument flange 4, the four-way pipe 3 is connected to the upper flange 8 through a hydraulic safety valve 6, the upper flange 8 is bolted to the casing head body 9, a casing hanger assembly 10 is installed in the casing head body 9, and threaded flanges 11 and square right-angle stop valves 12 are connected on both sides of the casing head body 9 through gate valves 2; the protection component 7 includes an electric driver 701, a box body 702 is fixedly installed on the electric driver 701, a hand lever 703 is rotatably installed on the box body 702, an adapter sleeve 705 is rotatably installed in the box body 702, the hand lever 703 is transmission-connected to the adapter sleeve 705, a shaft sleeve 704 is rotatably installed on the box body 702, and the shaft sleeve 704 It is connected to the electric drive 701, and a rotating sleeve 712 is fixedly installed on the shaft sleeve 704, and the rotating sleeve 712 is rotatably connected to the adapter sleeve 705; a built-in rotating shaft 708 is rotatably installed in the shaft sleeve 704, a take-up roller 719 is installed in the rotating sleeve 712, and an electromagnetic suction cup 720 is fixedly installed in the take-up roller 719. A horizontal sliding groove 722 is provided at one end of the built-in rotating shaft 708 close to the take-up roller 719, and a horizontal transmission block 721 is slidably installed inside the horizontal sliding groove 722; the take-up roller 719 is connected to the built-in rotating shaft 708 by attracting the horizontal transmission block 721 by the electromagnetic suction cup 720; the take-up roller 719 is connected to the slide plate 714 through a pull rope 717, and a longitudinal transmission block 713 is installed on the slide plate 714. The rotating sleeve 712 is transmission-connected to the adapter sleeve 705 by inserting the longitudinal transmission block 713 into the short-distance transmission groove 726 on the adapter sleeve 705.

[0040] Specifically, a transmission head 706 is installed on the hand rod 703, and a wide-pitch transmission groove 707 is provided on the adapter sleeve 705. The transmission head 706 slides in the wide-pitch transmission groove 707, and the hand rod 703 is transmitted and matched with the adapter sleeve 705 through the transmission head 706.

[0041] Specifically, a damping ring 718 is installed on the take-up roller 719 , and the take-up roller 719 is connected to the pull rope 717 through the damping ring 718 .

[0042] It should be noted that the shaft sleeve 704 is connected to the rotating shaft of the electric driver 701. When the hand lever 703 is connected to the shaft sleeve 704 through the adapter sleeve 705, the rotating shaft of the electric driver 701 can be driven to rotate by the hand lever 703, thereby realizing the function of emergency closing of the gate valve 2.

[0043] The electric driver 701 is connected to the valve stem of the gate valve 2 via a rotating shaft. When the gate valve 2 needs to be opened or closed, the electric driver 701 drives the valve stem to move via the rotating shaft, thereby realizing the opening and closing of the gate valve 2.

[0044] When it is necessary to open or close gate valve 2, refer to Figure 5-Figure 11 , start the electric driver 701, the electric driver 701 drives the valve stem of the gate valve 2 to move through the rotating shaft, so as to open and close the gate valve 2. In this process, the electric driver 701 drives the shaft sleeve 704 to rotate by rotating, see Figure 11 At the same time, the electromagnetic suction cup 720 is started, and the electromagnetic suction cup 720 attracts the horizontal transmission block 721. As the horizontal transmission block 721 moves closer to the electromagnetic suction cup 720, the horizontal transmission block 721 is inserted into the take-up roller 719, so that the built-in rotating shaft 708 is connected to the take-up roller 719 through the horizontal transmission block 721.

[0045] When the gear 712 is in the unlocked position, the gear 712 is unlocked, and the gear 712 is unlocked, so that the gear 712 is unlocked.

[0046] See also Figure 8-Figure 9 An inner gear ring 711 is fixedly installed inside the box 702, a planetary gear 710 is installed on the shaft sleeve 704, and a central gear 709 is installed on the built-in rotating shaft 708. The planetary gear 710 is meshed with the central gear 709 and the inner gear ring 711 respectively.

[0047] It should be noted that the center gear 709, the planetary gears 710 and the inner gear ring 711 constitute a planetary gear set. Since the inner gear ring 711 of the present invention is in a fixed state, according to the characteristics of the planetary gear set, when the planetary gear 710 rotates, that is, the sleeve 704 is the active component, and the center gear 709 is in a speed-increasing motion; when the built-in rotating shaft 708 rotates, that is, the center gear 709 is the active component, and the planetary gear 710 is in a speed-decelerating motion.

[0048] The present invention forms a planetary gear set by using a central gear 709, a planetary gear 710 and an inner gear ring 711, so that a speed difference is generated between the shaft sleeve 704 and the built-in rotating shaft 708 during the process of the electric driver 701 driving the shaft sleeve 704 to rotate. The speed difference between the two is used to realize the operation of disconnecting the connection between the rotating sleeve 712 and the adapter sleeve 705; at the same time, the speed-increasing movement of the built-in rotating shaft 708 can further accelerate the disconnection speed of the adapter sleeve 705 and the rotating sleeve 712, so that the adapter sleeve 705 and the rotating sleeve 712 can be disconnected at the beginning of the operation of the electric driver 701, further reducing the probability of physical interference between the hand lever 703 and the electric driver 701.

[0049] See also Figure 5-Figure 13 The inner wall of the rotating sleeve 712 is provided with a longitudinal sliding groove 715, and the slide plate 714 slides in the longitudinal sliding groove 715. The slide plate 714 is connected to the inner wall of the longitudinal sliding groove 715 through a longitudinal spring 716, and the longitudinal transmission block 713 is slidably connected to the rotating sleeve 712.

[0050] Specifically, the transverse transmission block 721 is connected to the inner wall of the transverse slide groove 722 through the transverse spring 723; when the electromagnetic suction cup 720 is started, the electromagnetic suction cup 720 adsorbs the transverse transmission block 721, and at this time the built-in rotating shaft 708 is connected to the take-up roller 719 through the transverse transmission block 721; when the electromagnetic suction cup 720 is disconnected, the transverse transmission block 721 enters the transverse slide groove 722 under the action of the transverse spring 723, and at this time the built-in rotating shaft 708 is disconnected from the take-up roller 719.

[0051] When the electric drive 701 fails, the gate valve 2 needs to be urgently closed by the hand lever 703, the power supply of the electromagnetic suction cup 720 is disconnected, and the horizontal transmission block 721 enters the horizontal slide groove 722 under the action of the horizontal spring 723, thereby completing the reset. The built-in rotating shaft 708 is disconnected from the take-up roller 719, and the vertical transmission block 713 is inserted into the short-distance transmission groove 726 on the adapter sleeve 705 under the action of the vertical spring 716 to realize the connection between the adapter sleeve 705 and the rotating sleeve 712. When the hand lever 703 is rotated, the hand lever 703 drives the rotating sleeve 712 and the shaft sleeve 704 to rotate through the adapter sleeve 705, thereby realizing the operation of emergency closing the gate valve 2 and reducing the probability of accidents.

[0052] Since the common fault of the electric driver 701 is circuit abnormality, such as circuit short circuit or open circuit, in order to improve the response speed of the electromagnetic chuck 720, the present invention connects the power supply of the electromagnetic chuck 720 in series with the electric driver 701 circuit.

[0053] As another example, see Figure 14-15 , an insert block 724 is installed on the hand lever 703, and a slot 725 is opened on the transverse transmission block 721; by pushing the hand lever 703, the insert block 724 passes through the rotating sleeve 712 and the electromagnetic suction cup 720 and is inserted into the slot 725, so that the hand lever 703 is directly connected to the built-in rotating shaft 708.

[0054] When electric actuator 701 fails, gate valve 2 needs to be urgently closed using hand lever 703. Before rotating hand lever 703, the insert 724 is pushed through rotating sleeve 712 and electromagnetic chuck 720 into slot 725, directly connecting hand lever 703 to internal rotating shaft 708. Hand lever 703 then drives internal rotating shaft 708, causing sleeve 704 to rotate and urgently close gate valve 2. During this process, due to the characteristics of the planetary gear set, when internal rotating shaft 708 is the active component, internal rotating shaft 708 drives sleeve 704 to decelerate its motion, increasing the output torque of sleeve 704 and thus achieving a labor-saving effect.

[0055] The implementation principle of the present invention is:

[0056] When it is necessary to open or close gate valve 2, refer to Figure 5-Figure 11 , start the electric driver 701, the electric driver 701 drives the valve stem of the gate valve 2 to move through the rotating shaft, so as to open and close the gate valve 2. In this process, the electric driver 701 drives the shaft sleeve 704 to rotate by rotating, see Figure 11 At the same time, the electromagnetic suction cup 720 is started, and the electromagnetic suction cup 720 attracts the horizontal transmission block 721. As the horizontal transmission block 721 moves closer to the electromagnetic suction cup 720, the horizontal transmission block 721 is inserted into the take-up roller 719, so that the built-in rotating shaft 708 is connected to the take-up roller 719 through the horizontal transmission block 721.

[0057] When the gear 712 is in the unlocked position, the gear 712 is unlocked, and the gear 712 is unlocked, so that the gear 712 is unlocked.

[0058] The center gear 709, the planetary gears 710, and the inner gear ring 711 constitute a planetary gear set. Since the inner gear ring 711 of the present invention is in a fixed state, according to the characteristics of the planetary gear set, when the planetary gear 710 rotates, that is, the sleeve 704 is the active component, and the center gear 709 is in a speed-increasing motion; when the built-in rotating shaft 708 rotates, that is, the center gear 709 is the active component, and the planetary gear 710 is in a speed-decelerating motion.

[0059] The present invention forms a planetary gear set by using a central gear 709, a planetary gear 710 and an inner gear ring 711, so that a speed difference is generated between the shaft sleeve 704 and the built-in rotating shaft 708 during the process of the electric driver 701 driving the shaft sleeve 704 to rotate. The speed difference between the two is used to realize the operation of disconnecting the connection between the rotating sleeve 712 and the adapter sleeve 705; at the same time, the speed-increasing movement of the built-in rotating shaft 708 can further accelerate the disconnection speed of the adapter sleeve 705 and the rotating sleeve 712, so that the adapter sleeve 705 and the rotating sleeve 712 can be disconnected at the beginning of the operation of the electric driver 701, further reducing the probability of physical interference between the hand lever 703 and the electric driver 701.

[0060] When the electric drive 701 fails, the gate valve 2 needs to be urgently closed by the hand lever 703, the power supply of the electromagnetic suction cup 720 is disconnected, and the horizontal transmission block 721 enters the horizontal slide groove 722 under the action of the horizontal spring 723, thereby completing the reset. The built-in rotating shaft 708 is disconnected from the take-up roller 719, and the vertical transmission block 713 is inserted into the short-distance transmission groove 726 on the adapter sleeve 705 under the action of the vertical spring 716 to realize the connection between the adapter sleeve 705 and the rotating sleeve 712. When the hand lever 703 is rotated, the hand lever 703 drives the rotating sleeve 712 and the shaft sleeve 704 to rotate through the adapter sleeve 705, thereby realizing the operation of emergency closing the gate valve 2 and reducing the probability of accidents.

[0061] Another method of use: When the electric actuator 701 fails, the handle 703 is pushed, causing the insert 724 to penetrate the rotating sleeve 712 and the electromagnetic suction cup 720 to be inserted into the slot 725, so that the handle 703 is directly connected to the internal rotating shaft 708. The handle 703 drives the internal rotating shaft 708, which drives the sleeve 704 to rotate and close the emergency gate valve 2. During this process, due to the characteristics of the planetary gear set, when the internal rotating shaft 708 is the active component, the internal rotating shaft 708 drives the sleeve 704 to decelerate, thereby increasing the output torque of the sleeve 704 and achieving a labor-saving effect.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A Christmas tree wellhead assembly, characterized by: It comprises a four-way pipe (3), gate valves (2) are respectively installed on the interfaces on both sides of the four-way pipe (3), a protection component (7) is installed on the gate valve (2), the gate valve (2) is connected to the throttle valve (1) and the instrument flange (4), a seismic pressure gauge (5) is installed on the instrument flange (4), the lower end interface of the four-way pipe (3) is connected to the upper flange (8) through the hydraulic safety valve (6), the upper flange (8) is bolted to the casing head body (9), a casing hanger assembly (10) is installed in the casing head body (9), and the two sides of the casing head body (9) are respectively connected to the threaded flange (11) and the square right-angle stop valve (12) through the gate valve (2); The protection assembly (7) includes an electric driver (701), a box (702) fixedly mounted on the electric driver (701), a rotatable hand lever (703) mounted on the box (702), an adapter sleeve (705) rotatably mounted in the box (702), the hand lever (703) and the adapter sleeve (705) being transmission-connected, a shaft sleeve (704) rotatably mounted on the box (702), the shaft sleeve (704) being connected to the electric driver (701), and the shaft sleeve (704) A rotating sleeve (712) is fixedly installed on the upper portion, and the rotating sleeve (712) is rotatably connected to the adapter sleeve (705); a built-in rotating shaft (708) is rotatably installed in the shaft sleeve (704), a take-up roller (719) is installed in the rotating sleeve (712), an electromagnetic suction cup (720) is fixedly installed in the take-up roller (719), a transverse sliding groove (722) is provided at one end of the built-in rotating shaft (708) close to the take-up roller (719), and a transverse transmission block (721) is slidably installed in the transverse sliding groove (722); The take-up roller (719) is connected to the built-in rotating shaft (708) by means of an electromagnetic suction cup (720) attracting a transverse transmission block (721); the take-up roller (719) is connected to a slide plate (714) via a pull rope (717); a longitudinal transmission block (713) is mounted on the slide plate (714); and the longitudinal transmission block (713) is inserted into a short-distance transmission groove (726) on the adapter sleeve (705), thereby enabling transmission connection between the rotating sleeve (712) and the adapter sleeve (705).

2. The Christmas tree wellhead assembly according to claim 1, characterized in that: An inner gear ring (711) is fixedly installed inside the housing (702), a planetary gear (710) is installed on the shaft sleeve (704), a center gear (709) is installed on the built-in rotating shaft (708), and the planetary gear (710) is meshed with the center gear (709) and the inner gear ring (711) respectively.

3. The Christmas tree wellhead assembly according to claim 1, characterized in that: A transmission head (706) is installed on the hand rod (703), a wide-pitch transmission groove (707) is provided on the adapter sleeve (705), the transmission head (706) is located in the wide-pitch transmission groove (707) and slides, and the hand rod (703) is transmission-matched with the adapter sleeve (705) through the transmission head (706).

4. The Christmas tree wellhead assembly according to claim 1, characterized in that: A longitudinal slot (715) is provided on the inner wall of the rotating sleeve (712), and the slide plate (714) slides in the longitudinal slot (715). The slide plate (714) is connected to the inner wall of the longitudinal slot (715) via a longitudinal spring (716), and the longitudinal transmission block (713) is slidably connected to the rotating sleeve (712).

5. The Christmas tree wellhead assembly according to claim 1, characterized in that: A damping ring (718) is installed on the take-up roller (719), and the take-up roller (719) is connected to the pull rope (717) via the damping ring (718).

6. The Christmas tree wellhead assembly according to claim 1, characterized in that: The transverse transmission block (721) is connected to the inner wall of the transverse chute (722) via a transverse spring (723); when the electromagnetic suction cup (720) is started, the electromagnetic suction cup (720) adsorbs the transverse transmission block (721), and at this time, the built-in rotating shaft (708) is connected to the take-up roller (719) via the transverse transmission block (721); when the electromagnetic suction cup (720) is disconnected, the transverse transmission block (721) enters the transverse chute (722) under the action of the transverse spring (723), and at this time, the built-in rotating shaft (708) is disconnected from the take-up roller (719).

7. The Christmas tree wellhead assembly according to claim 1, characterized in that: An insert block (724) is installed on the hand lever (703), and a slot (725) is provided on the transverse transmission block (721); by pushing the hand lever (703), the insert block (724) passes through the rotating sleeve (712) and the electromagnetic suction cup (720) and is inserted into the slot (725), so that the hand lever (703) is directly connected to the built-in rotating shaft (708).

Images