Single gravity compensator for oil casing
By designing a single gravity compensator for oil sleeves containing elastic parts and telescopic parts, the problem of low safety in oil pipe lifting is solved, and safe and efficient oil pipe lifting and rotating operations are achieved.
Patent Information
- Application Number
- CN202421626693.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing oil pipe lifting tools have low safety factors and are difficult to operate, which can easily cause major construction accidents and personal accidents.
A single gravity compensator including an elastic member, a telescopic member and a chuck is designed to provide buffering force by using the elastic deformation of the elastic member to achieve stable lifting and rotation of the oil pipe through the cooperation of the telescopic member and gravity.
It improves lifting safety, extends the service life of the tool, simplifies the operation process, and reduces the difficulty of manual operation.
Smart Images
Figure CN223089259U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a hoisting device, and in particular to a single gravity compensator for oil casing. Background Art
[0002] At present, in the field of oil, drilling operations or maintenance, oil pipes are usually lifted out and lowered one by one. Existing equipment usually uses a combination of steel wire ropes, hooks and oil pipe elevators on the derrick to achieve the lifting of oil pipes. The oil pipes are usually assisted manually during the lifting process and subsequently rotated manually. However, due to the heavy weight of the oil pipes, some oil pipes even weigh tons, and it is easy for the oil pipes to fall rapidly, causing major construction accidents or personal accidents. In addition, due to the heavy weight of the oil pipes, it is difficult for workers to operate and rotate the oil pipes. Therefore, it is urgent to develop a device that can buffer the pulling force of the oil pipe lifting and facilitate workers to perform rotation operations. Utility Model Content
[0003] In view of the problem that the oil pipe hoisting tools in the prior art are simple and have a high risk factor, a single gravity compensator for oil pipe and casing with a high safety factor, easy subsequent manual operation and long service life is provided. This application only takes the case of hoisting the oil pipe as an example for explanation, and the single gravity compensator for oil pipe and casing of this application can also be applied to other situations besides the oil pipe.
[0004] A single gravity compensator for oil casing according to the present application includes an elastic member, a telescopic member and a chuck, wherein the upper end of the telescopic member is connected to the elastic member, and the lower end of the telescopic member is connected to the chuck, and the chuck includes a chuck ring seat and a chuck core, and the hoisted object is arranged inside the chuck core, the inner side wall of the chuck ring seat is formed with an inclined surface, and the outer side wall of the chuck core is formed with a matching surface, and when the telescopic member drives the chuck ring seat and the chuck core to move relative to each other, the matching surface moves on the inclined surface, so that the chuck core holds or loosens the hoisted object.
[0005] Among them, the outer peripheral surface of the chuck can be provided with at least two lifting rings, and the lower end of the telescopic part is connected to the lifting ring; it can also include a lifting head, and the lifting head is provided with at least two lifting holes, and the upper end of the elastic part is connected to the lifting holes; the inner side wall of the chuck ring seat is formed with an inclined surface which gradually tilts inward from top to bottom, and the outer side wall of the chuck core is formed with a mating surface which gradually tilts inward from top to bottom; a radial limiting structure is formed between the inclined surface and the mating surface to prevent the mating surface from being radially separated from the inclined surface without axial movement; the chuck ring seat can include at least two arc-shaped structures that are engaged with each other.
[0006] Among them, a limit ring may also be included. The limit ring is located above the chuck ring seat. The limit ring is provided with strip-shaped holes extending in the radial direction. The chuck core is movably connected to the limit ring through movable rods penetrating through the strip-shaped holes. The limit ring may be formed by at least two fan-shaped structures engaged with each other through matching card slots and card protrusions. The limit ring may also be provided with limit holes. The chuck ring seat is movably connected to the limit ring through limit rods penetrating through the limit holes. A reset member may be provided on the limit rods. One end of the reset member abuts against the upper end surface of the chuck ring seat, and the other end of the reset member abuts against the lower end surface of the limit ring. A chuck base may also be included. The chuck base is movably connected to the chuck ring seat. The chuck ring seat rotates circumferentially relative to the chuck base through rolling members provided on the chuck base. An installation groove may be provided on the chuck base. The rolling members are arranged in the installation groove through installation beams penetrating through the installation groove. A rolling limit wall may be formed on the lower end surface of the chuck ring seat. The rolling members roll inside the rolling limit wall to enable the chuck ring seat to rotate circumferentially relative to the chuck base. The outer diameter of the chuck base may be larger than the outer diameter of the chuck ring seat. A rolling bearing may also be provided on the upper end surface of the outer peripheral edge of the chuck base. The rolling bearing may roll along the outer peripheral surface of the chuck ring seat.
[0007] The single-string gravity compensator for oil casing pipes according to the present application has the following beneficial effects:
[0008] (1) When the chuck grasps the oil pipe and hoists the oil pipe, through the elastic deformation of the elastic member, a buffering force can be provided for the hook on the derrick, thereby preventing the oil pipe from falling rapidly, with a higher safety factor and a longer service life of the lifting tool.
[0009] (2) The structure of the chuck is simplified, and no additional power needs to be provided during the hoisting process. The chuck can grasp the oil pipe only through the cooperation of the telescopic member and gravity.
[0010] (3) The chuck base and the chuck ring seat cooperate to rotate circumferentially, which is convenient for workers to perform subsequent oil pipe rotation operations. Description of the Drawings
[0011] Figure 1 It is a schematic diagram of the overall structure of the single-string gravity compensator for oil casing pipes.
[0012] Figure 2 It is Figure 1 a schematic diagram of the chuck structure in
[0013] Figure 3 It is Figure 2 a schematic diagram of the bottom structure of the chuck shown in
[0014] Figure 4Schematic diagram of the chuck structure after disassembling part of the structure.
[0015] Figure 5 is Figure 4 Schematic diagram of the bottom structure in
[0016] Elastic member X, sub-elastic member x, L suspension rod, Y telescopic member, Z lifting head, 1 chuck, 10 lifting rings, 11 chuck ring seat, 110 annular rolling groove, 111 arc-shaped structure, 12 chuck core, 121 tile core, A inclined surface, B mating surface, C radial limiting structure, 2 pin shafts, 13 limiting ring, 130 strip hole, 1300 limiting hole, 131 fan-shaped structure, 3 movable rod, 4 limiting rod, 5 reset member, 14 chuck base, 140 installation groove, 6 rolling member, 7 installation beam, 8 rolling bearing, S core seat, 9 connecting shaft. Specific embodiments
[0017] The technical solution of the present application will be further described below with reference to the accompanying drawings:
[0018] See Figure 1 As shown, a hoisting device is shown, specifically a single-string gravity compensator for oil casing pipes. It includes elastic member X, telescopic member Y and chuck 1. The upper end of telescopic member Y is connected to elastic member X, and the lower end of telescopic member Y is connected to chuck 1. Telescopic member Y can extend downward and then retract upward, so that chuck 1 sleeved on the oil pipe can grip the oil pipe, and then the elastic deformation of elastic member X is used to buffer the pulling force of hoisting the oil pipe. Preferably, elastic member X is a spring. Preferably, telescopic member Y is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is connected to elastic member X, and the piston rod of the hydraulic cylinder is connected to chuck 1. In the present application, when the chuck grips the oil pipe and hoists the oil pipe, through the elastic deformation of the elastic member, a buffering force can be provided for the hook on the derrick, thereby preventing the oil pipe from falling rapidly and causing major safety accidents, with a higher safety factor and a longer service life of the hoisting tool. Specifically, during operation, workers can extend the telescopic member to install the chuck on the oil pipe; when the telescopic member gradually retracts, the oil pipe is slowly lifted, and at this time the elastic member plays a buffering role.
[0019] See Figure 1 As shown, at least two lifting rings 10 are provided on the outer peripheral surface of chuck 1, and the lower end of telescopic member Y is connected to lifting ring 10. Preferably, a sub-elastic member x is further provided between telescopic member Y and chuck 1 to further improve the buffering effect. More preferably, in order to make the connection between sub-elastic member x and chuck 1 more stable, a suspension rod L is further provided between sub-elastic member x and chuck 1. A limiting block is provided at one end of suspension rod L connected to sub-elastic member x to limit the maximum extension length of suspension rod L. In the present application, using at least two lifting rings 10 can keep the balance of the chuck as much as possible and avoid the situation of the chuck tipping over.
[0020] See Figure 1As shown, it also includes a lifting head Z, which is provided with at least two lifting holes, and the upper end of the elastic member X is connected to the lifting hole. Preferably, a lifting hole is also opened on the upper part of the lifting head Z, and the lifting hook is inserted into the lifting hole to lift the entire set of equipment together with the oil pipe.
[0021] See also Figures 2 to 5 As shown, the chuck 1 includes a chuck ring seat 11 and a chuck core 12. The inner side wall of the chuck ring seat 11 is formed with an inclined surface A which is inclined inward from top to bottom. The outer side wall of the chuck core 12 is formed with a mating surface B which is inclined inward from top to bottom. The mating surface B slides on the inclined surface A so that the chuck core 12 releases the oil pipe when it moves upward relative to the chuck ring seat 11 and grasps the oil pipe when it moves downward. Preferably, a core seat S is provided on the inner side wall of the chuck ring seat 11, and the inclined surface A is formed on the core seat S. The core seat S is fixedly connected to the chuck ring seat 11 through a connecting shaft 9 which is inserted into the chuck ring seat 11. Preferably, the chuck core 12 includes a plurality of tile cores 121 which are evenly distributed along the circumferential direction of the inner side wall of the chuck ring seat 11. In order to increase the friction between the tile core 121 and the outer wall of the oil pipe, a grinding block is provided in the middle of the tile core 121. If the sanding block is seriously worn during long-term use, the sanding block can be replaced. The sanding block is formed with a trapezoidal clamping portion, which is clamped into the trapezoidal groove of the tile core 121. More preferably, the trapezoidal clamping portion and the trapezoidal groove are mutually matched in a transverse plug-in manner and are perpendicular to the axial direction of the oil pipe, thereby preventing the sanding block from falling with the movement of the oil pipe.
[0022] See also Figures 1 to 4 As shown, a radial limiting structure C is formed between the inclined surface A and the mating surface B to prevent the mating surface B from being radially separated from the inclined surface A without axial up and down movement. In the present application, the radial limiting structure C prevents the inclined surface A and the mating surface B from being directly radially separated without axial movement. Preferably, the radial limiting structure C is a trapezoidal groove and a trapezoidal protrusion formed between the inclined surface A and the mating surface B, so as to prevent the chuck core 12 from radially escaping from the chuck ring seat 11.
[0023] See also Figure 4 , 5 As shown, the chuck ring seat 11 uses at least two arc structures 111 to be connected through the pin shaft 2. This structural design can open the at least two arc structures 111 after pulling out the pin shaft 2, and install the oil pipe into the center of the chuck ring seat 11, which is more convenient for manual operation, and the structure is reasonable and convenient.
[0024] See also Figures 1 to 5As shown, it further includes a limit ring 13, and the limit ring 13 is located above the chuck ring seat 11. The limit ring 13 is provided with a through hole, for example, a strip-shaped hole 130 extending in the radial direction. The chuck core 12 is movably connected to the limit ring 13 through a movable rod 3 passing through the strip-shaped hole 130. Preferably, a convex block is formed at the top end of the movable rod 3 to prevent the movable rod 3 from disengaging from the strip-shaped hole 130.
[0025] See Figure 4 、 5 As shown, the limit ring 13 is formed by at least two fan-shaped structures 131 being engaged with each other through a matching slot and a snap projection. In this application, by using at least two fan-shaped structures to engage with each other, the opening action can be synchronized with the arc-shaped structure of the chuck ring seat, so as to load the oil pipe into the center of the limit ring.
[0026] See Figures 2 to 5 As shown, the limit ring 13 is further provided with a limit hole 1300, and the chuck ring seat 11 is movably connected to the limit ring 13 through a limit rod 4 passing through the limit hole 1300. A reset member 5 is arranged on the limit rod 4. One end of the reset member 5 abuts against the upper end surface of the chuck ring seat 11, and the other end of the reset member 5 abuts against the lower end surface of the limit ring 13. When the movable rod 3 drives the limit ring 13 to move downward relative to the chuck ring seat 11 under the drive of the chuck core 12, the reset member 5 provides a reset force to the limit ring 13 to move the limit ring away from the chuck ring seat. Preferably, a convex block is formed at the top end of the limit rod 4 to prevent the limit rod 4 from disengaging from the limit hole 1300. More preferably, the limit rod 4 is a screw fixed to the upper end surface of the chuck ring seat 11. Preferably, the reset member 5 is sleeved on the limit rod 4, and the reset member 5 is a spring. Preferably, the length of the movable rod 3 can be greater than the length of the limit rod 4.
[0027] See Figures 1 to 5 As shown, it further includes a chuck base 14, and the chuck base 14 is movably connected to the chuck ring seat 11, and the chuck ring seat 11 can rotate circumferentially relative to the chuck base 14. This structural design is beneficial for workers to perform rotational operations on the lifted oil pipe, improves the on-site operation efficiency, and the structure is simpler, more stable and durable. Preferably, in this application, the chuck base 14 and the chuck ring seat 11 are inseparable in the axial direction, so as to ensure the stability of the entire chuck structure. Preferably, the chuck base 14 is also formed as a whole by joining at least two components, so as to facilitate loading the oil pipe into its center.
[0028] See Figures 2 to 5 As shown, the chuck ring seat 11 rotates circumferentially relative to the chuck base 14 through a rolling member 6 arranged on the chuck base 14. Preferably, the rolling member is a roller.
[0029] See Figure 4 、 5As shown, an installation groove 140 is provided on the chuck base 14, and the rolling member 6 is disposed in the installation groove 140 through an installation beam 7 disposed in the installation groove 140. A rolling limit wall 110 is formed on the lower end surface of the chuck ring base 11, and the rolling member 6 rolls inside the rolling limit wall 110 to enable the chuck ring base 11 to rotate circumferentially relative to the chuck base 14. Preferably, a limit channel extending to the installation beam 7 is further formed on the chuck base 14, and a limit pin is inserted into the limit channel and connected to the installation beam 7, so as to ensure that the rolling member 6 rotating around the installation beam 7 can have a stable support.
[0030] See Figures 1 to 5 As shown, the outer diameter of the chuck base 14 is greater than the outer diameter of the chuck ring base 11, and a rolling bearing 8 is further provided on the upper end surface of the outer peripheral edge of the chuck base 14, and the rolling bearing 8 rolls along the outer peripheral surface of the chuck ring base 11. This structural design can further ensure that the circumferential rotation between the chuck ring base 11 and the chuck base 14 is smoother. Preferably, the lifting ring 10 is disposed on the outer peripheral surface of the chuck base 14. When the telescopic member of the present application drives the chuck ring base to move upward, the mating surface of the chuck core slides downward on the inclined surface of the chuck ring base, so that when the telescopic member drives the chuck ring base and the chuck core to move relatively, the mating surface moves on the inclined surface, so that the chuck core clamps or releases the lifted article. Specifically, when the chuck ring base moves upward, the chuck core will move downward relatively under the action of gravity or load, and at this time, without providing any external force drive, the relative movement of the chuck core relative to the chuck ring base can be realized.
[0031] Although the specific implementation manners of the present application have been described above, those of ordinary skill in the art can make transformations without departing from the spirit and principle of the present application. The protection scope of the present application is defined by its claims and their equivalents.
Claims
1. A single - root gravity compensator for oil casing pipes, characterized in that: It includes an elastic part, a telescopic part and a chuck, the upper end of the telescopic part is connected to the elastic part, the lower end of the telescopic part is connected to the chuck, the chuck includes a chuck ring seat and a chuck core, the hoisted object is arranged inside the chuck core, the inner side wall of the chuck ring seat is formed with an inclined surface, the outer side wall of the chuck core is formed with a matching surface, when the telescopic part drives the chuck ring seat and the chuck core to move relative to each other, the matching surface moves on the inclined surface, so that the chuck core holds or releases the hoisted object.
2. The single-piece gravity compensator for oil casing pipes according to claim 1, wherein: The outer peripheral surface of the chuck is provided with at least two lifting rings, and the lower end of the telescopic member is connected to the lifting rings.
3. The single-piece gravity compensator for oil casing pipes according to claim 1, characterized in that: It also includes a lifting head, which is provided with at least two lifting holes, and the upper end of the elastic member is connected to the lifting holes.
4. The single - string gravity compensator for oil casing pipes according to any one of claims 1 to 3, characterized in that: The inner side wall of the chuck ring seat is formed with an inclined surface which is gradually inclined inward from top to bottom, and the outer side wall of the chuck core is formed with a matching surface which is gradually inclined inward from top to bottom; when the telescopic member drives the chuck ring seat to move upward, the matching surface of the chuck core slides downward on the inclined surface of the chuck ring seat.
5. The single-piece gravity compensator for oil casing pipes according to claim 4, characterized in that: A radial limiting structure is formed between the inclined surface and the matching surface to prevent the matching surface from being radially separated from the inclined surface without axial movement.
6. The single-root gravity compensator for oil casing pipes according to claim 4, characterized in that: The chuck ring seat includes at least two arc-shaped structures that are engaged with each other.
7. The single-root gravity compensator for oil casing pipes according to claim 4, characterized in that: It also includes a limiting ring, which is located above the chuck ring seat. The limiting ring is provided with a strip hole extending in a radial direction. The chuck core is movably connected to the limiting ring via a movable rod passing through the strip hole.
8. The single gravity compensator for oil casing according to claim 7, characterized in that: The limiting ring adopts at least two sector-shaped structures which are engaged with each other through the engaging grooves and the engaging protrusions which cooperate with each other.
9. The single-piece gravity compensator for oil casing pipes according to claim 7, characterized in that: The limiting ring also has a limiting hole, and the chuck ring seat is movably connected to the limiting ring via a limiting rod passed through the limiting hole. A reset member is provided on the limiting rod, and one end of the reset member abuts against the upper end surface of the chuck ring seat, and the other end of the reset member abuts against the lower end surface of the limiting ring.
10. The single - string gravity compensator for oil - casing pipes according to any one of claims 7 to 9, characterized in that: It also includes a chuck base, which is movably connected to the chuck ring seat.
11. The single-piece gravity compensator for oil casing pipes according to claim 10, characterized in that: The chuck ring seat is circumferentially rotated relative to the chuck base via a rolling element arranged on the chuck base.
12. The single-piece gravity compensator for oil casing pipes according to claim 11, wherein: The chuck base is provided with a mounting groove, and the rolling element is arranged in the mounting groove through a mounting beam passing through the mounting groove.
13. The single - root gravity compensator for oil casing pipes according to claim 12, characterized in that: A rolling limit wall is formed on the lower end surface of the chuck ring seat, and the rolling element rolls on the inner side of the rolling limit wall to make the chuck ring seat rotate circumferentially relative to the chuck base.
14. The single-piece gravity compensator for oil casing pipes according to claim 10, characterized in that: The outer diameter of the chuck base is larger than the outer diameter of the chuck ring seat. A rolling bearing is also provided on the upper end surface of the outer peripheral edge of the chuck base. The rolling bearing rolls along the outer peripheral surface of the chuck ring seat.