Workover swivel is one of the important tools for well cleaning, casing milling, sand flushing and other workover operations. It is a conversion tool that connects the drill string and the hoisting system, and usually includes a rotating part and a non-rotating part. The rotating part is provided with a central tube, the non-rotating part is a bearing body, and has a hose connecting elbow which communicates with its inner cavity; a bearing is arranged between the rotating part and the non-rotating part.
In the prior art, the number of bearings between the rotating part and the bearing body is small, the bearing position is unreasonable, the bearing capacity is limited, the friction is serious, the rotational speed of the center tube is low, and it is difficult to meet the operation requirements. The location of the hose connecting elbow is unreasonable, and the hose is easily broken and damaged.
Sand washing is an important part of workover operation to remove the accumulated sand at the bottom of the well, restore and improve the production of the well or the injection rate. At present, the swivel used for sand washing is equipped with steel wire rope for anti-rotation and guide. This method has limited anti-rotation effect because the vibration generated by the swivel will make the fasteners loose and leave potential safety problem.
At present, the faucet used in the well workover and sand flushing operation adopts steel wire rope for anti-rotation and guidance. This guiding method has poor anti-rotation effect, and the vibration generated by the rotation of the faucet will loosen the fasteners, posing a safety hazard.
In order to solve the related problems, some Chinese enterprises invented an automatic sand washing device which can realize remote control and automatic operation, but has no anti-rotation and guide functions; another enterprise invented a washing device for water injection pump to prevent sand blocking, but no type swivel with anti-rotation and guide functions was found.
In this regard, San Jack invented a swivel with anti-rotation and guide device, as the below drawing shown, including elevator No.1, swivel No.2, bearing ring shaft No.3, hexagonal outer pipe No.4, limit block NO.5 and hexagonal through-hole No.6. The outer pipe radially passes through the radial through hole opened by the bearing ring shaft of the elevator, and the outer pipe and the radial through-hole mutually form an anti-rotation guide mechanism.
The hexagonal outer tube and the hexagonal through-hole are in clearance fit. The anti-rotation guide mechanism comprises hexagonal outer wall of the outer tube and hexagonal inner wall of the radial through-hole. The lower end of the outer tube is provided with a limit block for preventing the outer tube from falling out from the hexagonal through-hole. The upper end of the outer pipe is also provided with a limit block, or uses the swivel itself as the limit block. During sand washing, the hexagonal outer pipe is matched with the bearing ring shaft, and sliding up and down in the hexagonal through-hole of the bearing ring shaft to achieve stable guide and anti-rotation.
In this design, the hexagonal outer tube is matched with the bearing ring axle box, sliding up and down in the hexagonal through-hole of the bearing ring shaft to achieve stable guide and anti-rotation. So the safety performance and work efficiency are both improved.
A swivel with an anti-rotation guide device is characterized in that it includes an outer pipe and a faucet connected to a port on the outer pipe, the outer pipe radially passes through the radial through hole opened by the bearing ring shaft of the elevator, so that the outer tube and the radial through hole form an anti-rotation guide mechanism with each other, the outer tube is a hexagonal outer tube, the radial through hole is a hexagonal through hole, and the hexagonal outer tube and the hexagonal through hole are clearance fit, The anti-rotation guiding mechanism includes a hexagonal outer wall of the outer tube and a hexagonal inner wall of the radial through hole, the lower end of the outer tube is provided with a limit block for preventing the outer tube from coming out of the hexagonal through hole, and the upper end of the outer tube is also provided with a limit block. Limit blocks or use the faucet itself as a limit block.
The utility model discloses a faucet with an anti-rotation guide device, comprising an outer pipe and a faucet connected to an upper port of the outer pipe. The outer pipe radially passes through a radial through hole opened on a bearing ring shaft of an elevator, The outer tube and the radial through holes mutually form an anti-rotation guide mechanism. The outer tube is a hexagonal outer tube, the radial through hole is a hexagonal through hole, and the hexagonal outer tube and the hexagonal through hole are in clearance fit. The anti-rotation guide mechanism includes a hexagonal outer wall of the outer tube and a hexagonal inner wall of the radial through hole.
The lower end of the outer tube is provided with a limiting block for preventing the outer tube from coming out of the hexagonal through hole. The utility model can effectively prevent the water faucet from vibrating violently during the sand flushing operation, and can effectively prevent the water faucet from rotating.
Compared with the prior art, the utility model has the following beneficial effects:
A hexagonal through hole is arranged on the bearing ring shaft, a hexagonal outer pipe is connected to the faucet, and a limiting block is connected to the hexagonal outer pipe. During the sand washing operation, the hexagonal outer tube is matched with the bearing ring shaft to slide up and down in the hexagonal through hole of the bearing ring shaft to achieve stable guidance and anti-rotation.
