Hydraulic elevator suitable for petroleum workover rig

Abstract

The hydraulic elevator suitable for the petroleum workover rig comprises a concentric-square-shaped frame, an inlet and outlet fracture is formed in the front side of the concentric-square-shaped frame, two clamp bodies are arranged in the concentric-square-shaped frame, the close sides of the two clamp bodies are each of a concave arc structure, and the repellent sides of the two clamp bodies are each of a rectangular shape and are fixedly connected with four T-shaped guide rods. By arranging a series of structures, pressure control clamping and falling prevention can be conveniently and accurately conducted on a tubular column from the two sides through single drive, clamping and fixing accuracy is improved, the mode that the two sides evenly and synchronously clamp and fix the tubular column to the middle is achieved through the single electric hydraulic rod, and the tubular column can directly enter from the front side through the matched inlet and outlet fracture; according to the pressure-controlled clamping device, independent driving equipment on the two sides and blocking driving equipment on the front side are not needed, use is easy and convenient, use convenience and energy saving performance are improved, a worker can be obviously prompted to be in a stable pressure-controlled clamping state during pressure-controlled clamping, and the worker can conveniently master whether the worker is in the stable clamping state or not in well repair work.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum workover technology field, concretely is a kind of hydraulic elevator suitable for petroleum workover unit. BACKGROUND

[0002] In the construction process of oil and gas exploration and development, workover operation is an important link, and the commonly used pipe string lifting tool in the process of oilfield workover operation is mostly manual elevator, which needs manual operation to complete the opening and closing of the elevator, and the labor intensity of workers is large, especially due to frequent tripping operation, which increases the burden of workers.

[0003] For this, according to the search report of the novelty search agency, the announcement number CN216381265U discloses a hydraulic elevator suitable for petroleum workover unit, including jaw body, the jaw body both sides are fixedly provided with lock rod, the jaw body upper end surface is fixedly provided with jaw opening, the jaw opening inside is fixedly provided with coupling detector, the jaw opening both sides inner ends are fixedly provided with slip, two The opposite sides of the slip are fixedly connected with driving cylinder, the jaw body front end is rotatably provided with lock block, the lock block front end surface is fixedly connected with pull rod, the pull rod is fixedly sleeved with connecting plate, the connecting plate away from pull rod one end is hinged with driving hydraulic cylinder, the jaw body both sides are movably sleeved with suspender;The elevator device is simple in structure and convenient to control, not only has automatic detection function, can determine the locking of oil pipe, improves the safety of device, and can realize the adjustment of overturning function, saves time and labor in use.

[0004] The above-mentioned technology discloses a hydraulic elevator suitable for petroleum workover unit, which controls the opening and closing of lock block by driving hydraulic cylinder for pipe column entering, and drives two slips to move relatively by driving cylinder on both sides to clamp and prevent the work from being separated, without manual opening and clamping operation, but there are still the following deficiencies in use: 1, the mode of controlling opening and closing by driving hydraulic cylinder and clamping control by two driving cylinders, when clamping the elevator of pipe column in workover work, multiple driving devices need to be used cooperatively, cannot be driven automatically and precisely to control pressure clamping and prevent separation, and the operation convenience and energy saving are not ideal;2, lack of structure for clearly prompting personnel to be in stable clamping and preventing separation state during clamping, which is not convenient for personnel to control whether it is in stable clamping state in workover work;In view of this, the present application proposes a hydraulic elevator suitable for petroleum workover unit to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a hydraulic elevator suitable for petroleum workover unit to solve the problems in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A hydraulic elevator hook suitable for petroleum workover rig, including the back -shaped frame, the front side of back -shaped frame is provided with the in -out fracture, back -shaped frame is provided with two tongs, the side of two tongs close to each other is all set to concave arc structure, the side of repulsion of two tongs is rectangular fixedly connected with four T-shaped guide rod, back -shaped frame sliding sleeve is set on eight T-shaped guide rod, the rear side of back -shaped frame is fixedly installed with PLC controller and with the prompt light of PLC controller electric connection,

[0007] The rear inner wall of the back-shaped frame is embedded with a hydraulic force applying assembly electrically connected with the PLC controller, oil pipes are fixedly connected to both sides of the hydraulic force applying assembly, and pressure measuring and pushing assemblies for horizontal pushing and pressure measuring during oil feeding are fixedly connected to the side of repulsion of the two tongs. The front end of the pressure measuring and pushing assembly is in communication with the corresponding oil pipe, and the pressure measuring and pushing assembly is electrically connected with the PLC controller. The hydraulic force applying assembly is used for controlled oil feeding in the two oil pipes by the PLC controller, the two pressure measuring and pushing assemblies are used for driving the two tongs to move close to each other for clamping and preventing separation when oil is fed into the two oil pipes, and are used for detecting the extrusion force during clamping and transmitting the pressure value to the PLC controller. When the pressure value reaches the preset value, the PLC controller controls the prompt light to turn on and controls the hydraulic force applying assembly to stop applying pressure.

[0008] Preferably, the hydraulic force applying assembly includes an oil tank embedded and fixed on the rear inner wall of the back-shaped frame, a first piston is sealingly and slidingly sleeved in the oil tank, hydraulic oil is filled in the oil tank in front of the first piston, an electric hydraulic rod with its rear side fixedly connected to the first piston is fixedly installed on the rear side of the oil tank, a first air hole is formed on the left rear side of the oil tank, both sides of the oil tank are fixedly connected to one end of the two oil pipes, and the PLC controller is electrically connected with the electric hydraulic rod.

[0009] Preferably, the pressure measuring and pushing assembly includes a pressure sensor electrically connected with the PLC controller, the side of repulsion of the two tongs is fixedly connected with the pressure sensor, outer pipes are embedded and fixed on both sides of the back-shaped frame, the end of repulsion of the two outer pipes is set as a plugging structure, the rear side of the outer pipe is fixedly connected to the front end of the corresponding oil pipe, a second piston is sealingly and slidingly sleeved in the outer pipe, the two second pistons are located between the two oil pipes, a connecting rod is fixedly connected between the side of the corresponding pressure sensor and the side of the corresponding second piston, the back-shaped frame is slidingly sleeved on the two connecting rods, a spring is fixedly connected between the side of the corresponding second piston and the outer side of the back-shaped frame, and the spring is slidingly sleeved on the corresponding connecting rod.

[0010] Preferably, the rear side of the back-shaped frame is fixedly connected with a lithium battery below the PLC controller, and the PLC controller, the electric hydraulic rod and the prompt lamp are electrically connected with the lithium battery.

[0011] Preferably, the two sides of the back-shaped frame are fixedly connected with two lifting rings.

[0012] Preferably, the two sides of the back-shaped frame are fixedly connected with two lifting rings.

[0013] Preferably, the two sides of the back-shaped frame are fixedly connected with two lifting rings.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The back-shaped frame, the lifting ring, the inlet and outlet, the PLC controller, the oil pipe, the clamp body, the hydraulic force applying assembly and the pressure measuring and pushing assembly are cooperated, the pipe column can be controlled and clamped from two sides automatically and accurately, the clamping accuracy is improved, the pipe column can be directly entered from the front side through the cooperatively arranged inlet and outlet, the driving equipment is not needed to be arranged on the two sides and the front side, the use is simple, the use convenience and energy saving are improved, and the personnel can be prompted to be in the stable control and clamping state when the pipe column is controlled and clamped.

[0016] 2. The PLC controller and the prompt lamp are cooperated, the personnel can be prompted to be in the stable control and clamping state when the pipe column is controlled and clamped, the personnel can control whether the pipe column is in the stable clamping state in the well repairing work, and the safety use is facilitated.

[0017] The utility model discloses a series of structures are arranged, the pipe column can be controlled and clamped from two sides automatically and accurately, the clamping accuracy is improved, the pipe column can be directly entered from the front side through the cooperatively arranged inlet and outlet, the driving equipment is not needed to be arranged on the two sides and the front side, the use is simple, the use convenience and energy saving are improved, the personnel can be prompted to be in the stable control and clamping state when the pipe column is controlled and clamped, and the personnel can control whether the pipe column is in the stable clamping state in the well repairing work. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a kind of overall structure schematic diagram of hydraulic elevator clamp suitable for petroleum workover rig;

[0019] Figure 2 The utility model discloses a kind of overall structure schematic diagram of hydraulic elevator clamp suitable for petroleum workover rig;

[0020] Figure 3 For Figure 2 A part of the enlarged structural schematic diagram in the figure.

[0021] In the figure: 1, back-shaped frame; 101, access to the fracture; 102, lifting ring; 2, clamp body; 201, T-shaped guide rod; 3, oil storage tank; 301, first piston; 302, electric hydraulic rod; 303, oil pipe; 4, PLC controller; 401, prompt light; 5, outer tube; 501, second piston; 502, connecting rod; 503, pressure sensor; 504, spring; 505, second air hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] As Figures 1 to 3 shown, the hydraulic lifting clamp suitable for the petroleum workover rig provided in the embodiment includes a back-shaped frame 1, the front side of the back-shaped frame 1 is provided with an access to the fracture 101, two clamp bodies 2 are arranged in the back-shaped frame 1, the side close to each other of the two clamp bodies 2 is arranged as a concave arc structure, the side repelling each other of the two clamp bodies 2 is fixedly connected with four T-shaped guide rods 201 in a rectangular shape, the back-shaped frame 1 is slidingly sleeved on the eight T-shaped guide rods 201, four horizontal guide holes are arranged in the inner wall of the horizontal guide hole and the outer side of the corresponding T-shaped guide rod 201 in a sliding fit, which plays a horizontal sliding guiding effect on the T-shaped guide rod 201, the back-shaped frame 1 is fixedly installed with a PLC controller 4 and a prompt light 401 electrically connected with the PLC controller 4 at the back side, a plurality of anti-skid protrusions are integrally arranged on the side close to each other of the two clamp bodies 2, two lifting rings 102 are fixedly connected with the two sides of the back-shaped frame 1, the lifting ring 102 is arranged to cooperate with the external lifting hook or lifting rod to support the back-shaped frame 1;

[0024] The rear inner wall of the back-shaped frame 1 is fixedly embedded with a hydraulic force applying assembly electrically connected with the PLC controller 4, both sides of the hydraulic force applying assembly are fixedly communicated with oil pipes 303, wherein both sides of the back-shaped frame 1 are provided with oil pipe perforations for the corresponding oil pipes 303 to pass through, and the repelling sides of the two clamp bodies 2 are fixedly connected with pressure measuring and pushing assemblies for horizontal pushing and pressure measuring during oil feeding, the pressure measuring and pushing assemblies are fixedly communicated with the front ends of the corresponding oil pipes 303, and the pressure measuring and pushing assemblies are electrically connected with the PLC controller 4; the hydraulic force applying assembly is used for controlled oil feeding in the two oil pipes 303 by the PLC controller 4, the two pressure measuring and pushing assemblies are used for driving the two clamp bodies 2 to move close to each other for clamping and preventing separation when oil is fed in the two oil pipes 303, and are used for detecting the extrusion force during clamping and transmitting the pressure value to the PLC controller 4, the PLC controller 4 is used for controlling the warning light 401 to be turned on and the hydraulic force applying assembly to be closed and stopped to continue to apply pressure when the pressure value reaches a preset value, and the anti-slip protrusions are used for enhancing the anti-slip performance during clamping.

[0025] Specifically, the hydraulic force applying assembly comprises an oil storage tank 3 fixedly embedded on the rear inner wall of the back-shaped frame 1, wherein the rear inner wall of the back-shaped frame 1 is provided with an embedded hole fixedly connected with the outer side of the oil storage tank 3, a first piston 301 is sealingly and slidably sleeved in the oil storage tank 3, the front side of the first piston 301 is provided with hydraulic oil filled in the oil storage tank 3, the rear side of the oil storage tank 3 is fixedly installed with an electric hydraulic rod 302 with a fixed connection between the rear side of the first piston 301 and the extending end of the electric hydraulic rod 302, a first air hole is formed on the left side of the rear side of the oil storage tank 3, and both sides of the oil storage tank 3 are fixedly communicated with one end of the two oil pipes 303, the rear side of the back-shaped frame 1 is fixedly installed with a lithium battery below the PLC controller 4, the PLC controller 4, the electric hydraulic rod 302 and the warning light 401 are electrically connected with the lithium battery, and the PLC controller 4 is electrically connected with the electric hydraulic rod 302; the oil storage tank 3, the first piston 301, the first air hole and the electric hydraulic rod 302 are matched, the electric hydraulic rod 302 is started by the PLC controller 4, the first piston 301 is driven to move forward or move backward, the hydraulic oil in the oil storage tank 3 is extruded when the first piston 301 moves forward, under the extrusion force, the effect of uniform oil feeding in the two oil pipes 303 is realized by matching the characteristics of automatic and uniform oil flow under pressure.

[0026] Further, the pressure measuring and pushing assembly comprises pressure sensors 503 electrically connected with the PLC controller 4, the sides close to the two pressure sensors 503 are fixedly connected with the sides repelling the two clamp bodies 2 respectively, the two sides of the back-shaped frame 1 are fixedly embedded with outer pipes 5, the sides repelling the two outer pipes 5 are all set as blocking structures, the rear side of the outer pipe 5 is fixedly communicated with the front end of the corresponding oil pipe 303, the second pistons 501 are sealingly and slidingly sleeved in the outer pipe 5, the two second pistons 501 are located between the two oil pipes 303, the sides close to the two second pistons 501 are fixedly connected with the connecting rods 502 between the corresponding pressure sensors 503 respectively, the back-shaped frame 1 is slidingly sleeved on the two connecting rods 502, the sides close to the two second pistons 501 are fixedly connected with the springs 504 between the outer sides of the back-shaped frame 1, the springs 504 are movably sleeved on the corresponding connecting rods 502, wherein the two sides of the back-shaped frame 1 are both provided with embedded grooves, the inner walls of the embedded grooves are fixedly connected with the outer sides of the corresponding outer pipes 5, the second air holes 505 are formed in the inner walls of the sides away from the openings of the embedded grooves and are communicated with the interiors of the corresponding outer pipes 5, the second air holes 505 are used for air exhausting when the corresponding second pistons 501 move horizontally, so as to avoid the phenomenon of gas retention in the outer pipe 5, wherein the inner walls of the sides away from the openings of the embedded grooves are also provided with guiding through holes for slidingly sleeving the outer sides of the corresponding connecting rods 502, so as to guide the horizontal sliding of the connecting rods 502; the pressure sensors 503, the outer pipes 5, the second pistons 501, the connecting rods 502 and the springs 504 are matched, when the oil is supplied into the two oil pipes 303, the oils on the two sides are supplied into the two outer pipes 5 respectively, and the two second pistons 501 are pressed in the close direction, under the pressing force, the two second pistons 501 move close to each other and compress the two springs 504, the two second pistons 501 drive the two pressure sensors 503 to move close to each other through the two connecting rods 502, the two pressure sensors 503 drive the two clamp bodies 2 to move close to each other, so as to clamp and prevent the pipe column from being separated during well repair, the two pressure sensors 503 detect the pressing force applied by the two connecting rods 502 and transmit the pressure value to the PLC controller 4, when the pressure value reaches the preset value, the PLC controller 4 controls the prompt lamp 401 to be turned on and controls the electric hydraulic rod 302 to be closed, so as to realize the effects of automatic and accurate pressure control, clamping and preventing separation, and clearly prompting the personnel that the pressure control and clamping are in the state of pressure control and clamping, improve the clamping accuracy, and realize the mode that the two sides are uniformly and synchronously clamped to the middle by using a single electric hydraulic rod 302, the pipe column can be directly entered from the front side by matching the mode that the entry and exit fracture 101 is provided, without separately providing driving devices on the two sides and blocking driving devices on the front side, so as to improve the use convenience and energy saving property.

[0027] The use method of the embodiment is: when the hydraulic lifting clamp suitable for the oil workover rig is used, the four lifting rings 102 are connected with the lifting hooks or lifting rods of external lifting equipment to lift and support or lift the back-shaped frame 1, the back-shaped frame 1 is moved forward from the rear side of the pipe column to be clamped, the pipe column directly enters between the two clamp bodies 2 from the inlet and outlet fracture 101, the pressure value of the closed electric hydraulic rod 302 and the opened prompt light 401 is pre-set according to the clamping requirement by using the PLC controller 4, the electric hydraulic rod 302 is started in the forward direction, the first piston 301 is driven to move forward, the hydraulic oil in the oil tank 3 is extruded when the first piston 301 moves forward, under the extrusion force, the hydraulic oil is uniformly distributed into the two oil pipes 303 according to the characteristics of the automatic uniform distribution of the liquid under pressure, the oil on both sides is supplied into the two outer pipes 5, and the two second pistons 501 are extruded in the similar direction, under the extrusion force, the two second pistons 501 move in the similar direction and compress the two springs 504, the two second pistons 501 drive the two pressure sensors 503 to move in the similar direction through the two connecting rods 502, the two pressure sensors 503 drive the two clamp bodies 2 to move in the similar direction, the pipe column is clamped and prevented from falling off during the workover, the extrusion force applied by the two connecting rods 502 is detected by the two pressure sensors 503 and transmitted to the PLC controller 4, when the pressure value reaches the preset value, the PLC controller 4 controls the prompt light 401 to be opened and controls the electric hydraulic rod 302 to be closed, the effect of single-drive automatic precise pressure control and clamping prevention of the pipe column is realized, the clamping precision is improved, the two sides are uniformly and synchronously clamped to the middle by using a single electric hydraulic rod 302, the pipe column can be directly entered from the front side by using the set inlet and outlet fracture 101, the driving equipment on both sides and the front side driving equipment are not needed to be separately set, the use is simple, the use convenience and energy saving are improved, and the prompt light 401 is opened to prompt when the clamping pressure is reached, the effect that the personnel is clearly prompted to be in the stable pressure control and clamping state is realized, and the personnel can easily control whether the personnel is in the stable clamping state during the workover;

[0028] When the clamping state needs to be released subsequently, the electric hydraulic rod 302 is started in the reverse direction to drive the first piston 301 to move backward and reset, the hydraulic oil is drawn back through the oil tank 3 and the two oil pipes 303 when the first piston 301 moves backward, the extrusion force is released, the two second pistons 501 are driven by the two springs 504 in the compression state to move away, the two second pistons 501 drive the two clamp bodies 2 to move away through the two connecting rods 502 and the two pressure sensors 503, and the clamping state is released.

[0029] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A hydraulic lifting clamp suitable for oil well workover rigs, comprising a rotary frame (1), characterized in that: The front side of the spiral frame (1) is provided with an inlet / outlet cut-out (101). The spiral frame (1) is provided with two clamps (2). The sides of the two clamps (2) that are close to each other are both set with a concave arc structure. The sides of the two clamps (2) that are repulsive to each other are both fixedly connected with four T-shaped guide rods (201) in a rectangular shape. The spiral frame (1) is slidably sleeved on the eight T-shaped guide rods (201). The rear side of the spiral frame (1) is fixedly installed with a PLC controller (4) and an indicator light (401) that is electrically connected to the PLC controller (4). The rear inner wall of the spiral frame (1) is fitted with a hydraulic force application component that is electrically connected to the PLC controller (4). Both sides of the hydraulic force application component are connected and fixed with oil pipes (303). The two clamps (2) are fixedly connected to a pressure measuring and pushing component for horizontal pushing and pressure measurement when oil is applied. The pressure measuring and pushing component is connected and fixed to the front end of the corresponding oil pipe (303). The pressure measuring and pushing component is electrically connected to the PLC controller (4).

2. A hydraulic lifting clamp suitable for oil well workover rigs according to claim 1, characterized in that: The hydraulic force application component includes an oil storage tank (3) embedded and fixed on the inner wall of the rear side of the spiral frame (1). A first piston (301) is sealed and slidably sleeved inside the oil storage tank (3). Hydraulic oil filled in the oil storage tank (3) is provided on the front side of the first piston (301). An electric hydraulic rod (302) with its extended end fixedly connected to the rear side of the first piston (301) is fixedly installed on the rear side of the oil storage tank (3). A first vent hole is opened on the left side of the rear side of the oil storage tank (3). The two sides of the oil storage tank (3) are respectively connected and fixed to one end of two oil pipes (303). The PLC controller (4) is electrically connected to the electric hydraulic rod (302).

3. A hydraulic lifting clamp suitable for oil well workover rigs according to claim 1, characterized in that: The pressure measuring and pushing assembly includes pressure sensors (503) electrically connected to the PLC controller (4). The two pressure sensors (503) are fixedly connected to the opposing sides of the two clamps (2) respectively. Both sides of the ring frame (1) are fitted with outer tubes (5). The opposing ends of the two outer tubes (5) are set as sealing structures. The rear side of the outer tube (5) is connected and fixed to the front end of the corresponding oil pipe (303). The outer tube (5) is sealed and slidably fitted with a second piston (501). Two second pistons (501) are located between two oil pipes (303). The two second pistons (501) are respectively fixedly connected to the corresponding pressure sensors (503) on their adjacent sides. The ring frame (1) is slidably sleeved on the two connecting rods (502). The two second pistons (501) are respectively fixedly connected to the outer side of the ring frame (1) on their adjacent sides. The springs (504) are movably sleeved on the corresponding connecting rods (502).

4. A hydraulic lifting clamp suitable for oil well workover rigs according to claim 2, characterized in that: A lithium battery located below the PLC controller (4) is fixedly installed on the rear side of the boom (1). The PLC controller (4), the electric hydraulic rod (302), and the indicator light (401) are all electrically connected to the lithium battery.

5. A hydraulic lifting clamp suitable for oil well workover rigs according to claim 1, characterized in that: Two lifting rings (102) are fixedly connected to both sides of the spiral frame (1).

6. A hydraulic lifting clamp for oil well workover rigs according to claim 3, characterized in that: The two sides of the spiral frame (1) are provided with mounting grooves. The inner wall of the mounting groove is fixedly connected to the outer side of the corresponding outer tube (5). A second vent hole (505) is provided on the inner wall of the mounting groove away from its opening, which is connected to the inside of the corresponding outer tube (5).

7. A hydraulic lifting clamp suitable for oil well workover rigs according to claim 1, characterized in that: Multiple anti-slip protrusions are integrally provided on the adjacent sides of the two clamp bodies (2).

Images