Manual self-tightening type quick disassembly and assembly anti-jacking and anti-falling chuck

Abstract

The utility model relates to a chuck, in particular to a manual self-tightening type quick disassembly and assembly anti-jacking and anti-falling chuck which is used for solving the problems that in the process of lifting or lowering an oil pipe, if the pressure in a well suddenly increases, the oil pipe is jacked upwards and even is out of control and rushes out of a wellhead, and the pressure in the well suddenly disappears in the construction stop process, so that the oil pipe cannot fall off. And the oil pipe falls into a well under the action of the weight of the oil pipe. According to the manual self-tightening type quick disassembly and assembly anti-jacking and anti-falling chuck, the holding hoop is arranged at the bottom of the shell assembly, so that the chuck can be quickly connected with an upper flange of a wellhead or an upper flange of a blowout preventer during use, and the situation that a bolt is used for connecting the upper flange of the wellhead or the upper flange of the blowout preventer for a long time to cause risks is avoided; the device can be mounted on a wellhead flange or an upper flange of a blowout preventer in advance, and can also be quickly mounted when an oil pipe tends to be jacked upwards.

Description

Technical Field

[0001] The utility model relates to a chuck, in particular to a manual self-tightening quick-disassembly and assembly anti-topping and anti-falling chuck. Background Art

[0002] In conventional well repair operations of oil, water and gas wells, the wellhead usually lacks equipment to prevent tubing from lifting. When tubing lifting occurs, a reverse pull-type anti-lifting method is usually used on site, that is, by connecting a short tubing above the extracted tubing coupling, installing another set of tubing elevators on the short tubing, and then using wire ropes to tie this set of tubing elevators to the wellhead to prevent tubing from lifting. However, this method is time-consuming and risky, and sometimes the tubing may have already rushed out of the wellhead before the control components can be installed.

[0003] When the oil pipe is pushed up out of control, it will cause the oil pipe to hit the oil truck hook and its lifting eye, and even multiple oil pipes may rush out of the wellhead, causing serious safety accidents. At the same time, the well pressure may suddenly disappear during the well repair process. At this time, the oil pipe that loses the thrust in the well will suddenly fall down, causing a fall into the well accident.

[0004] Therefore, there is an urgent need to develop a new type of well control device that can be quickly installed at the wellhead and can simultaneously prevent the oil pipe from lifting and falling, so as to improve the safety and efficiency of the well repair operation. Summary of the invention

[0005] The utility model aims to solve the problems that in the process of lifting or lowering the oil pipe, if the pressure in the well suddenly increases, the oil pipe will be pushed up, or even rush out of the wellhead out of control, and the pressure in the well suddenly disappears during the construction pause, and the oil pipe falls into the well under the action of its weight, and provides a manual self-tightening quick-disassembly anti-pushing and anti-falling chuck.

[0006] In order to solve the deficiencies of the above-mentioned prior art, the present invention provides the following technical solutions:

[0007] A manual self-tightening quick disassembly and assembly anti-topping and anti-falling chuck, which is special in that it comprises a shell assembly, on which a slip assembly, a clamping clamp and a slip linkage driving mechanism are arranged;

[0008] The housing assembly includes an anti-fall flange located at the top, and a front plate and a rear plate located at the front and rear respectively; the anti-fall flange includes a flange body and two sets of anti-fall locking tongue assemblies, the two sets of anti-fall locking tongue assemblies are both located in the flange body and are symmetrically arranged on the left and right, and are used to prevent the coupling on the upper part of the oil pipe from passing through; the front plate is provided with a second oil pipe opening for the oil pipe to enter and exit;

[0009] The slip assembly comprises two slip seats and two tooth blocks which are symmetrically arranged in the housing assembly. The two tooth blocks are respectively arranged in the two slip seats, and each slip seat is slidably connected with the front plate and the rear plate.

[0010] The slip linkage drive mechanism includes a rotating handle, a locking handle assembly, and two slip drive mechanisms arranged on the housing assembly;

[0011] The output end of each slip drive mechanism is connected to the slip seat on the same side, and the two slip drive mechanisms are respectively connected by a connecting assembly and a connecting rod, and the connecting assembly is an elastic member; the rotating handle is arranged on one of the slip drive mechanisms, and is used to control the slip assembly to move downward to the lower limit position and open through the two slip drive mechanisms; one end of the locking handle assembly is hinged on the front plate, and the other end is used to be engaged with one of the slip drive mechanisms, so that the slip assembly is always located at the lower limit position and in an open state;

[0012] The clamping clamp includes a fixed flap arranged at the bottom of the slip assembly, two movable flaps symmetrically hinged on the fixed flap, a quick locking mechanism arranged at the closing point of the two movable flaps, and a cover plate arranged at the bottom of the fixed flap, and a third oil pipe opening for the oil pipe to enter and exit is arranged on the cover plate.

[0013] Furthermore, the shell assembly also includes a left plate and a right plate that are symmetrically arranged in an eight-shaped shape, and two slide grooves are arranged on the front plate and the rear plate. The two slide grooves are symmetrically arranged and are parallel to the left plate and the right plate respectively.

[0014] Furthermore, each of the cava seats is provided with an upper through hole and a connecting pin, the upper through hole passes through the cava seat front to back, the middle part of the connecting pin is located in the upper through hole, and the two ends are respectively arranged in the corresponding slide grooves of the front plate and the rear plate.

[0015] Further, each of the slip drive mechanisms comprises an inner telescopic shaft, a first connecting shaft, a second connecting shaft, a first rotating sleeve assembly and a second rotating sleeve assembly; the first rotating sleeve assembly comprises a first connecting sleeve, a first connecting sleeve and a first rotating pin;

[0016] The front end of the second connecting shaft passes through the front plate, the middle part is sleeved with the first connecting sleeve, and the rear end passes through the rear plate and is sequentially connected to one end of the first connecting fork and one end of the second rotating sleeve assembly; the first connecting sleeve is vertically connected to the first connecting sleeve; the outer end of the inner telescopic shaft extends into the first connecting sleeve, and the inner end slides and connects the corresponding slip seat on the same side between the front plate and the rear plate through the first connecting shaft;

[0017] The other ends of the first connecting forks of the two slip driving mechanisms are respectively connected to the two ends of the connecting assembly, and the other ends of the second rotating sleeve assemblies of the two slip driving mechanisms are respectively connected to the two ends of the connecting rod;

[0018] The rotating handle is connected to the first connecting sleeve of one of the slip driving mechanisms through the first rotating pin.

[0019] Furthermore, each of the slip seats is also provided with a mounting groove and a lower through hole, the mounting groove is located at the lower part of the outer side wall of the slip seat, the mounting groove opening faces downward, and is located in the middle position of the front-to-back direction of the slip seat, and the lower through hole penetrates the front side wall and the rear side wall of the mounting groove;

[0020] The inner end of the inner telescopic shaft is located in the mounting groove of the corresponding slip seat on the same side. After the first connecting shaft passes through the lower through hole of the corresponding slip seat on the same side and the through hole on the inner end of the inner telescopic shaft, the two ends are respectively located in the sliding grooves on the same side of the front plate and the rear plate, so that the slip seat on the same side is slidably connected between the front plate and the rear plate.

[0021] Further, the second rotating sleeve assembly includes a second connecting sleeve and a second connecting fork;

[0022] The second connecting sleeve is arranged on the rear end of the second connecting shaft, the second connecting fork is vertically fixedly connected to the second connecting sleeve, and the second connecting fork is connected to the end portion on the same side of the connecting rod.

[0023] Furthermore, the connecting assembly includes a second tension spring and two spring pull rods respectively arranged at both ends of the second tension spring, one end of the first connecting fork is vertically connected to the rear end of the second connecting shaft, and the other end is connected to the end of the spring pull rod on the same side.

[0024] Further, the locking handle assembly includes a fixed seat, a second rotating pin, a locking handle and a locking rod; the fixed seat is fixedly connected to the front plate, one end of the locking rod is provided with the locking handle, and the other end is hinged to the fixed seat through the second rotating pin;

[0025] A second slot adapted to the locking rod is provided at the front end of the second connecting shaft of one of the slip drive mechanisms.

[0026] Furthermore, an anti-drop tongue plate accommodating cavity is formed in the flange body, and a first oil pipe opening connected to the anti-drop tongue plate accommodating cavity is provided on the flange body for oil pipe entry and exit, and two sets of anti-drop lock tongue assemblies are both located in the anti-drop tongue plate accommodating cavity and are arranged symmetrically on the left and right;

[0027] Each group of the anti-drop lock tongue assembly includes an anti-drop tongue plate, two first tension springs, a lock pin assembly and a pull ring; the two first tension springs are symmetrically arranged on both sides of the anti-drop tongue plate, each first tension spring is arranged along the moving direction of the anti-drop tongue plate, one end is arranged on the flange body, and the other end is arranged on the outside of the anti-drop tongue plate; a semicircular opening is arranged on the inner side of the anti-drop tongue plate, and a limiting hole is arranged on the outer side; the lock pin assembly includes a spring pin and a brake crank arm, the spring pin is fixed on the bottom surface of the flange body in the vertical direction, and the upper end of the pin shaft of the spring pin extends into the limiting hole, the upper end of the brake crank arm is located on the outside of the flange body, and the lower end is connected to the lower end of the pin shaft of the spring pin;

[0028] The pull ring is connected to the middle part of the outer side of the tongue-fall-proof plate and is used for moving the tongue-fall-proof plate.

[0029] Furthermore, the quick locking mechanism includes a first fixed seat, a second fixed seat, a hinge shaft, a locking bolt and a nut; the first fixed seat is hinged with the locking bolt through the hinge shaft, and a nut is arranged on the locking bolt; the second fixed seat is provided with a first slot with an upward opening, and the locking bolt is clamped in the first slot when it is rotated to a horizontal position.

[0030] Compared with the prior art, the beneficial effects of the utility model are:

[0031] (1) The utility model is a manual self-tightening quick-disassembly anti-lifting and anti-falling chuck. By arranging a clamping hoop at the bottom of the shell assembly, it can be quickly connected to the wellhead upper flange or the blowout preventer upper flange when in use, avoiding the risk of taking too long when connecting with the wellhead upper flange or the blowout preventer upper flange by bolts. The utility model can be installed on the wellhead flange or the blowout preventer upper flange in advance, and can also be quickly installed when the oil pipe shows a tendency to lift up.

[0032] (2) The utility model is a manual self-tightening quick-disassembly anti-pushing and anti-falling chuck. During the normal lifting and lowering of the oil pipe, the slip assembly can be kept in an open state and can be manually locked by the locking handle assembly without affecting the normal lifting and lowering of the oil pipe. When the pressure in the well suddenly increases, the slip assembly can be quickly unlocked by manually knocking the locking handle, so that the slip seat can quickly clamp the oil pipe under the pull of the connecting assembly. In addition, because the position of the utility model when clamping the oil pipe to prevent it from pushing up is random, and the pressure in the well sometimes disappears suddenly during the construction pause, the utility model provides a manually unlocked anti-falling lock tongue assembly to receive the coupling connected to the upper end of the oil pipe, ensuring that the anti-falling tongue plate catches the coupling at the upper end of the oil pipe under the pull of the first tension spring to prevent the oil pipe from falling.

[0033] (3) The utility model is a manual self-tightening quick-disassembly and anti-lifting and anti-falling chuck, which can manually open the slip to ensure that the oil pipe can be normally lifted and lowered without the upward force, and the slip seat adopts a symmetrical plane cone guide method when moving up and down, which is conducive to the oil pipe being in the center of the wellhead when the tooth block holds the oil pipe tightly.

[0034] (4) In the manual self-tightening quick disassembly and assembly anti-topping and anti-falling chuck of the utility model, the quick locking mechanism for locking the clamp and the locking handle assembly for unlocking the slip are both driven by a hammer to achieve quick clamping. They can also be unlocked by remote control of personnel by pneumatic or hydraulic means according to the power configuration of the on-site operating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an embodiment of a manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck of the utility model;

[0036] Figure 2 This is a schematic diagram of the structure of the clamping hoop in the embodiment of the utility model;

[0037] Figure 3 It is a structural schematic diagram of the clamping clamp, the slip seat, and the slip driving mechanism in the embodiment of the utility model (the first rotating pin and the first connecting fork are not shown);

[0038] Figure 4 It is a left side view of an embodiment of the utility model;

[0039] Figure 5 The rear view of the embodiment of the utility model Figure 1 ;

[0040] Figure 6 The rear view of the embodiment of the utility model Figure 2 ;

[0041] Figure 7 This is a state diagram of the slip assembly when it is clamped in an embodiment of the utility model;

[0042] Figure 8 It is a structural schematic diagram of the anti-drop tongue plate in the embodiment of the utility model when it is locked in the closed position;

[0043] Fig. 9 This is a schematic diagram of the structure of the tongue-drop prevention plate when it is opened in the embodiment of the utility model;

[0044] Fig.10 This is a schematic diagram of the structure of the slip seat in the embodiment of the utility model;

[0045] Fig.11 for Fig.10 AA section view;

[0046] Fig.12It is a structural schematic diagram of the locking handle assembly in an embodiment of the utility model.

[0047] The reference numerals are described as follows: 1-housing assembly, 11-anti-fall flange, 111-flange body, 1111-anti-fall tongue plate accommodating chamber, 112-anti-fall tongue plate, 1121-semicircular opening, 1122-limiting hole, 113-lock pin assembly, 1131-spring pin, 1132-brake crank arm, 114-pull ring, 115-first tension spring, 116-first oil pipe opening, 12-front plate, 13-rear plate, 14-left side plate, 15-right side plate, 16-slide groove;

[0048] 2-holding clamp, 21-fixed flap, 22-movable flap, 23-quick locking mechanism, 231-first fixed seat, 232-second fixed seat, 233-hinge shaft, 234-locking bolt, 235-nut, 236-first slot, 24-cover plate, 241-third oil pipe opening;

[0049] 3-slip assembly, 31-slip seat, 311-mounting groove, 312-upper through hole, 313-lower through hole, 314-connecting pin, 32-tooth block;

[0050] 5-rotate handle; 6-connecting rod;

[0051] 7-slip drive mechanism, 71-inner telescopic shaft, 72-first connecting shaft, 73-first rotating sleeve assembly, 731-first connecting sleeve, 732-first connecting sleeve, 733-first rotating pin, 74-second connecting shaft, 741-first connecting fork, 742-second clamping groove, 75-second rotating sleeve assembly, 751-second connecting sleeve, 752-second connecting fork;

[0052] 8-spring pull rod; 9-second tension spring;

[0053] 10-locking handle assembly, 101-fixed seat, 102-second rotating pin, 103-locking handle, 104-locking rod. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings and exemplary embodiments.

[0055] Reference Figures 1 to 12 A manual self-tightening quick-disassembly and anti-topping and anti-falling chuck, hereinafter referred to as "chuck", comprises a shell assembly 1, on which a slip assembly 3, a clamping clamp 2 and a slip linkage driving mechanism are arranged.

[0056] Reference Figure 1 , Figure 3 and Figure 4The housing assembly 1 includes an anti-fall flange 11 located at the top, a front plate 12 and a rear plate 13 located at the front and rear respectively, and a left side plate 14 and a right side plate 15 located at the left and right respectively.

[0057] Reference Figure 8 and Fig. 9 The anti-fall flange 11 includes a flange body 111 and two sets of anti-fall locking tongue assemblies. An anti-fall tongue plate accommodating cavity 1111 is formed in the flange body 111. A first oil pipe opening 116 connected to the anti-fall tongue plate accommodating cavity 1111 is provided on the flange body 111 for oil pipe to enter and exit. The two sets of anti-fall locking tongue assemblies are both located in the anti-fall tongue plate accommodating cavity 1111 and are symmetrically arranged on the left and right.

[0058] Reference Figures 7 to 9 Each set of anti-drop lock tongue assembly includes an anti-drop tongue plate 112, two first tension springs 115, a lock pin assembly 113 and a pull ring 114. The anti-drop tongue plate 112 translates in the left-right direction, and the two first tension springs 115 are symmetrically arranged on both sides of the anti-drop tongue plate 112. Each first tension spring 115 is arranged along the moving direction of the anti-drop tongue plate 112, with one end arranged on the flange body 111 and the other end arranged on the outside of the anti-drop tongue plate 112.

[0059] Each anti-drop tongue plate 112 is provided with a semicircular opening 1121 on the inner side for limiting the coupling on the upper part of the oil pipe, and a limiting hole 1122 is provided on the outer side. When the two anti-drop tongue plates 112 are closed, the diameter of the circular opening formed by the two semicircular openings 1121 matches the diameter of the oil pipe and is smaller than the size of the coupling. Therefore, when the oil pipe falls, the coupling on the upper part of the oil pipe can be clamped by the anti-drop tongue plate 112, thereby preventing the oil pipe from falling further.

[0060] Reference Figure 7 The lock pin assembly 113 includes a spring pin 1131 and a brake crank arm 1132. The spring pin 1131 is fixed on the bottom surface of the flange body 111 in the vertical direction, and the upper end of the pin shaft of the spring pin 1131 extends into the limiting hole 1122. The upper end of the brake crank arm 1132 is located outside the flange body 111 and is not connected to the flange body 111, and the lower end is connected to the lower end of the pin shaft of the spring pin 1131. The upper end of the brake crank arm 1132 is knocked downward, so that the brake crank arm 1132 drives the spring pin 1131 to move downward, and then the pin shaft of the spring pin 1131 is disengaged from the limiting hole 1122, releasing the limit of the anti-drop tongue plate 112, so that the two anti-drop tongue plates 112 are quickly closed to prevent the oil pipe from falling into the well.

[0061] Reference Figure 8 , Fig. 9 The pull ring 114 is connected to the middle part of the outer side of the anti-drop tongue plate 112 and is used to move the anti-drop tongue plate 112. The pull ring 114 can be made of a steel wire rope.

[0062] A second oil pipe opening for oil pipe to enter and exit is provided on the front plate 12. Figure 1 and Figure 7 The left side plate 14 and the right side plate 15 are symmetrically arranged in an eight-shaped shape, and two slide grooves 16 are arranged on the front plate 12 and the rear plate 13. The two slide grooves 16 are symmetrically arranged and parallel to the left side plate 14 and the right side plate 15 respectively.

[0063] Reference Figure 7 , Fig.10 and Fig.11 The slip assembly 3 is used to hold the oil pipe tightly. The slip assembly 3 includes two slip seats 31 and two tooth blocks 32 which are symmetrically arranged in the shell assembly 1. The two tooth blocks 32 are detachably arranged in the two slip seats 31 respectively; each slip seat 31 is provided with a mounting groove 311, an upper through hole 312, a lower through hole 313 and a connecting pin 314; the mounting groove 311 is located at the lower part of the outer wall of the slip seat 31, the mounting groove 311 opens downward and is located in the middle position of the front and rear direction of the slip seat 31, the upper through hole 312 and the lower through hole 313 both penetrate the slip seat 31 front and back, and the lower through hole 313 penetrates the front side wall and the rear side wall of the mounting groove 311; the middle part of the connecting pin 314 is located in the upper through hole 312, and the two ends are arranged in the corresponding slide groove 16.

[0064] Reference Figure 1 , Figure 3 , Figure 5 and Figure 6 The slip linkage driving mechanism includes a rotating handle 5, a connecting assembly, a connecting rod 6, two slip driving mechanisms 7 arranged on the left and right, two spring pull rods 8, a second tension spring 9 and a locking handle assembly 10. The two spring pull rods 8 and the second tension spring 9 form a connecting assembly, and the two spring pull rods 8 are respectively arranged at both ends of the second tension spring 9, and the spring pull rod 8 is modified by a screw rod.

[0065] The cava drive mechanism 7 includes an inner telescopic shaft 71, a first connecting shaft 72, a first rotating sleeve assembly 73, a second connecting shaft 74 and a second rotating sleeve assembly 75; the first rotating sleeve assembly 73 includes a first connecting sleeve 731, a first connecting sleeve 732 and a first rotating pin 733; the second rotating sleeve assembly 75 includes a second connecting sleeve 751 and a second connecting fork 752 vertically fixed to the second connecting sleeve 751.

[0066] The front end of the second connecting shaft 74 passes through the front plate 12, the middle part is sleeved with the first connecting sleeve 732, and the rear end passes through the rear plate 13 and is sequentially provided with a radial convex ring and a second connecting sleeve 751; the radial convex ring is clamped with the rear plate 13, and a first connecting fork 741 is vertically welded on the radial protrusion, and the first connecting fork 741 is connected to the end of the spring pull rod 8 on the same side; the second connecting sleeve 751 is vertically fixedly connected with a second connecting fork 752, and the second connecting fork 752 is connected to the end of the connecting rod 6 on the same side;

[0067] The first connecting sleeve 732 is vertically connected to the first connecting sleeve 731; the outer end of the inner telescopic shaft 71 extends into the first connecting sleeve 731, and the inner end slides and connects the corresponding cava seat 31 on the same side between the front plate 12 and the rear plate 13 through the first connecting shaft 72. Specifically, the inner end of the inner telescopic shaft 71 is located in the mounting groove 311 of the corresponding cava seat 31 on the same side. After the first connecting shaft 72 passes through the lower through hole 313 of the corresponding cava seat 31 on the same side and the through hole on the inner end of the inner telescopic shaft 71, both ends are respectively located in the sliding grooves 16 on the same side of the front plate 12 and the rear plate 13, so as to slide and connect the cava seat 31 on the same side between the front plate 12 and the rear plate 13; the upper part of the cava assembly 3 is hinged by the connecting pin 314, and the lower part is hinged by the first connecting shaft 72, which can effectively prevent the cava assembly 3 from flipping over during movement.

[0068] The rotating handle 5 is connected to the first connecting sleeve 732 of one of the slip driving mechanisms 7 via a first rotating pin 733 .

[0069] Reference Figure 3 and Fig.12 The locking handle assembly 10 includes a fixed seat 101, a second rotating pin 102, a locking handle 103 and a locking rod 104. The fixed seat 101 is fixedly connected to the front plate 12, and the locking handle 103 is set at one end of the locking rod 104, and the other end is hinged to the fixed seat 101 through the second rotating pin 102; the front end of the second connecting shaft 74 of one of the cava driving mechanisms 7 is provided with a second card slot 742 adapted to the locking rod 104. Knock the locking handle 103 to the rear side, and the left end of the locking handle 103 can be stuck in the second card slot 742, so that the cava assembly 3 is always locked in the open state, ensuring that the oil pipe can be lowered normally. When the oil pipe needs to be clamped, knock the locking handle 103 to the front side, and the left end of the locking handle 103 will be out of the second card slot 742, and the second tension spring 9 will contract to drive the cava assembly 3 upward and clamp the oil pipe.

[0070] The clamping clamp 2 is of three-petal type, including a fixed petal 21 arranged at the bottom of the slip assembly 3, a movable petal 22 symmetrically hinged on the fixed petal 21, and a quick locking mechanism 23 arranged at the closing position of the two movable petals 22. A cover plate 24 is provided at the bottom of the fixed petal 21. When the two movable petals 22 are closed, they can clamp the wellhead upper flange or the blowout preventer upper flange.

[0071] The cover plate 24 is provided with a third oil pipe opening 241 for oil pipes to enter and exit. The third oil pipe opening 241 is composed of a central circular hole and radially arranged strip holes. The diameter of the circular hole matches the oil pipe. The first oil pipe opening, the second oil pipe opening 116 and the third oil pipe opening 241 are connected.

[0072] Reference Figure 2 and Figure 3The quick locking mechanism 23 includes a first fixing seat 231, a second fixing seat 232, a hinge shaft 233, a locking bolt 234 and a nut 235. The locking bolt 234 is hingedly connected to the first fixing seat 231 through the hinge shaft 233, and the nut 235 is arranged on the locking bolt 234. The second fixing seat 232 is provided with a first clamping groove 236 with an opening facing upward, and the locking bolt 234 can be clamped in the first clamping groove 236 when it is rotated to a horizontal position. When the quick locking mechanism 23 needs to be locked or unlocked, it is only necessary to hammer the end of the locking bolt 234.

[0073] The working principle of the utility model is as follows:

[0074] Step 1. Before use;

[0075] Step 1.1, open the slip assembly 3: refer to Figure 1 , Figure 3 , Figure 5 and Figure 7 , turn the handle 5, and the turning handle 5 drives the first rotating sleeve assembly 73 in the right slip linkage driving mechanism 7 to rotate, and the first rotating sleeve assembly 73 drives the inner telescopic shaft 71, the first connecting shaft 72, the slip seat 31 and the tooth block 32 on the right side to move downward along the slide groove 16 in sequence; at the same time, the first rotating sleeve assembly 73 drives the second connecting shaft 74, the second rotating sleeve assembly 75, the connecting rod 6 and the slip driving mechanism 7 on the left side to move in sequence, thereby pushing the slip seat 31 and the tooth block 32 on the left side to also move downward along the slide groove 16 synchronously, until the slip assembly 3 moves downward to the lower limit position, and the two tooth blocks 32 are in an open state;

[0076] Step 1.2, locking the slip assembly 3: rotate the second connecting shaft 74 to the engaging position, knock the locking handle 103 backward, so that the locking rod 104 in the locking handle 103 is engaged in the second engaging groove 742 of the second connecting shaft 74, and the slip linkage driving mechanism is locked to ensure that the slip assembly 3 is always in the lower limit position, and the two tooth blocks 32 are in the open state, so as to ensure that the oil pipe can be lowered normally;

[0077] Step 1.3, reference Figure 8 and Fig. 9 , manually pull the pull ring 114 outward to move the two anti-drop tongue plates 112 away from each other. When the two anti-drop tongue plates 112 are moved to the preset open position, the upper end of the pin shaft of the spring pin 1131 automatically extends into the limiting hole 1122 of the anti-drop tongue plate 112. At this time, the anti-drop tongue plate 112 is locked in the open position to ensure that the oil pipe passage is unobstructed, and the preparation work is completed;

[0078] Step 1.4, open the clamp 2: turn the locking bolt 234 to separate the two movable petals 22 to ensure that the clamp 2 is in an open state in case of emergency use;

[0079] Step 2: When installing and using;

[0080] Step 2.1, Installation and positioning: Use the hydraulic winch of the well repair equipment to lift the chuck or manually lift it, and quickly move it horizontally to fit it on the wellhead flange or the blowout preventer flange;

[0081] Step 2.2, close the clamp 2: manually and quickly close the two movable petals 22, then quickly rotate the locking bolt 234, and press the locking bolt 234 into the first clamping groove 236 to ensure that the chuck is reliably connected to the wellhead;

[0082] Step 3, implement clamping;

[0083] Quickly strike the locking handle 103 with a hammer (or a wrench) to make the locking rod 104 escape from the second clamping groove 742 of the second connecting shaft 74, and drive the spring pull rod 8, the second connecting shaft 74, the second rotating sleeve assembly 75, and the connecting rod 6 to move through the second tension spring 9, thereby driving the slip assembly 3 to quickly move upward to clamp the oil pipe;

[0084] Step 4: Close the anti-drop tongue plate;

[0085] Manually press down the lock pin assembly 113, so that the anti-drop tongue plate 112 moves inward quickly under the action of the first tension spring 115 to hold the oil pipe;

[0086] Step 5: Open the slip;

[0087] Step 5.1, when there is no upward force on the tubing, use the lifting system of the workover equipment to hang the tubing and the tool string, and slowly lower them more than 30 mm to withdraw the slip assembly 3;

[0088] Step 5.2, remove the chuck according to steps 1.1 to 1.4;

[0089] Step 5.3, lift the chuck with the lifting device of the well repair equipment or manually lift it, remove it from the wellhead flange, and place it in a suitable position for standby use (special note here, for the sake of greater safety and reliability, the chuck can always be placed on the wellhead for standby use during the well repair process without affecting the construction operation).

Claims

1. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck, characterized by: The invention comprises a housing assembly (1), on which a slip assembly (3), a clamping clamp (2) and a slip linkage drive mechanism are arranged; The housing assembly (1) comprises an anti-fall flange (11) located at the top, and a front plate (12) and a rear plate (13) located at the front and rear respectively; the anti-fall flange (11) comprises a flange body (111) and two sets of anti-fall locking tongue assemblies, the two sets of anti-fall locking tongue assemblies are both located in the flange body (111) and are symmetrically arranged on the left and right, and are used to prevent the coupling on the upper part of the oil pipe from passing through; the front plate (12) is provided with a second oil pipe opening for the oil pipe to enter and exit; The slip assembly (3) comprises two slip seats (31) and two tooth blocks (32) which are symmetrically arranged in the housing assembly (1); the two tooth blocks (32) are respectively arranged in the two slip seats (31); and each slip seat (31) is slidably connected to the front plate (12) and the rear plate (13); The slip linkage drive mechanism comprises a rotating handle (5), a locking handle assembly (10), and two slip drive mechanisms (7) arranged on the housing assembly (1); The output end of each slip drive mechanism (7) is connected to the slip seat (31) on the same side, and the two slip drive mechanisms (7) are respectively connected via a connecting assembly and a connecting rod (6), wherein the connecting assembly is an elastic member; the rotating handle (5) is arranged on one of the slip drive mechanisms (7) and is used to control the slip assembly (3) to move downward to the lower limit position and open through the two slip drive mechanisms (7); one end of the locking handle assembly (10) is hinged on the front plate (12), and the other end is used to be connected to one of the slip drive mechanisms (7) so that the slip assembly (3) is always located at the lower limit position and is in an open state; The clamping clamp (2) comprises a fixed flap (21) arranged at the bottom of the slip assembly (3), two movable flaps (22) symmetrically hinged on the fixed flap (21), a quick locking mechanism (23) arranged at the closing position of the two movable flaps (22), and a cover plate (24) arranged at the bottom of the fixed flap (21), and a third oil pipe opening (241) for the oil pipe to enter and exit is arranged on the cover plate (24).

2. According to claim 1, a manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck is characterized by: The housing assembly (1) further comprises a left side plate (14) and a right side plate (15) which are symmetrically arranged in an eight-shaped shape. Two slide grooves (16) are arranged on the front plate (12) and the rear plate (13). The two slide grooves (16) are symmetrically arranged and are parallel to the left side plate (14) and the right side plate (15), respectively.

3. According to claim 2, a manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck is characterized by: Each of the cava seats (31) is provided with an upper through hole (312) and a connecting pin (314); the upper through hole (312) passes through the cava seat (31) from front to back; the middle of the connecting pin (314) is located in the upper through hole (312), and the two ends are respectively arranged in corresponding slide grooves (16) of the front plate (12) and the rear plate (13).

4. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to claim 3, characterized in that: Each of the slip drive mechanisms (7) comprises an inner telescopic shaft (71), a first connecting shaft (72), a second connecting shaft (74), a first rotating sleeve assembly (73) and a second rotating sleeve assembly (75); the first rotating sleeve assembly (73) comprises a first connecting sleeve (731), a first connecting sleeve (732) and a first rotating pin (733); The front end of the second connecting shaft (74) passes through the front plate (12), the middle part is sleeved with the first connecting sleeve (732), and the rear end passes through the rear plate (13) and is sequentially connected to one end of the first connecting fork (741) and one end of the second rotating sleeve assembly (75); the first connecting sleeve (732) is vertically connected to the first connecting sleeve (731); the outer end of the inner telescopic shaft (71) extends into the first connecting sleeve (731), and the inner end slides and connects the corresponding slip seat (31) on the same side between the front plate (12) and the rear plate (13) through the first connecting shaft (72); The other ends of the first connecting forks (741) of the two slip drive mechanisms (7) are respectively connected to the two ends of the connecting assembly, and the other ends of the second rotating sleeve assemblies (75) of the two slip drive mechanisms (7) are respectively connected to the two ends of the connecting rod (6); The rotating handle (5) is connected to a first connecting sleeve (732) of one of the slip drive mechanisms (7) via the first rotating pin (733).

5. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to claim 4, characterized in that: Each of the slip seats (31) is also provided with a mounting groove (311) and a lower through hole (313); the mounting groove (311) is located at the lower part of the outer wall of the slip seat (31); the mounting groove (311) opens downward and is located at the middle position in the front-to-back direction of the slip seat (31); and the lower through hole (313) passes through the front side wall and the rear side wall of the mounting groove (311); The inner end of the inner telescopic shaft (71) is located in the mounting groove (311) of the corresponding slip seat (31) on the same side. After the first connecting shaft (72) passes through the lower through hole (313) of the corresponding slip seat (31) on the same side and the through hole on the inner end of the inner telescopic shaft (71), the two ends are respectively located in the sliding grooves (16) on the same side of the front plate (12) and the rear plate (13), so that the slip seat (31) on the same side is slidably connected between the front plate (12) and the rear plate (13).

6. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to claim 4, characterized in that: The second rotating sleeve assembly (75) comprises a second connecting sleeve (751) and a second connecting fork (752); The second connecting sleeve (751) is arranged on the rear end of the second connecting shaft (74), the second connecting fork (752) is vertically fixedly connected to the second connecting sleeve (751), and the second connecting fork (752) is connected to the end on the same side of the connecting rod (6).

7. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to claim 4, characterized in that: The connecting assembly comprises a second tension spring (9) and two spring pull rods (8) respectively arranged at both ends of the second tension spring (9); one end of the first connecting fork (741) is vertically connected to the rear end of the second connecting shaft (74), and the other end is connected to the end of the spring pull rod (8) on the same side.

8. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to any one of claims 4 to 7, characterized in that: The locking handle assembly (10) comprises a fixed seat (101), a second rotating pin (102), a locking handle (103) and a locking rod (104); the fixed seat (101) is fixedly connected to the front plate, one end of the locking rod (104) is provided with the locking handle (103), and the other end is hinged to the fixed seat (101) through the second rotating pin (102); A second locking groove (742) adapted to the locking rod (104) is provided at the front end of the second connecting shaft (74) of one of the slip drive mechanisms (7).

9. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to claim 1, characterized in that: An anti-drop tongue plate accommodating chamber (1111) is formed in the flange body (111), and a first oil pipe opening (116) connected to the anti-drop tongue plate accommodating chamber (1111) is provided on the flange body (111) for oil pipe entry and exit, and two sets of anti-drop lock tongue assemblies are both located in the anti-drop tongue plate accommodating chamber (1111) and are symmetrically arranged on both sides; Each group of the anti-drop lock tongue assembly comprises an anti-drop tongue plate (112), two first tension springs (115), a lock pin assembly (113) and a pull ring (114); the two first tension springs (115) are symmetrically arranged on both sides of the anti-drop tongue plate (112); each first tension spring (115) is arranged along the moving direction of the anti-drop tongue plate (112), one end of which is arranged on the flange body (111), and the other end is arranged on the outer side of the anti-drop tongue plate (112); the inner side of the anti-drop tongue plate (112) is provided with a semicircular opening (1121), a limiting hole (1122) is arranged on the outside; the locking pin assembly (113) comprises a spring pin (1131) and a braking arm (1132), the spring pin (1131) is fixed on the bottom surface of the flange body (111) in the vertical direction, and the upper end of the pin shaft of the spring pin (1131) extends into the limiting hole (1122), the upper end of the braking arm (1132) is located on the outside of the flange body (111), and the lower end is connected to the lower end of the pin shaft of the spring pin (1131); The pull ring (114) is connected to the middle part of the outer side of the tongue-drop prevention plate (112) and is used to move the tongue-drop prevention plate (112).

10. A manual self-tightening quick disassembly and assembly anti-top and anti-fall chuck according to claim 1, characterized in that: The quick locking mechanism (23) comprises a first fixing seat (231), a second fixing seat (232), a hinge shaft (233), a locking bolt (234) and a nut (235); the first fixing seat (231) is hingedly connected to the locking bolt (234) via the hinge shaft (233), the locking bolt (234) is provided with a nut (235), the second fixing seat (232) is provided with a first clamping groove (236) with an opening facing upward, and the locking bolt (234) is clamped in the first clamping groove (236) when it is rotated to a horizontal position.

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