A power slip and its manufacturing process

Abstract

The invention provides a power slip and a manufacturing and machining process. The slip is provided with a gate seat at the front part of a slip seat; a bearing frame is connected with the slip seat through a bolt; a slip tooth is connected with a bracket through a bolt; the bracket is connected with the bearing frame through a key slot; a top cover plate is connected with the slip seat through a connecting bolt. The slip seat is internally provided with a circular-arch-shaped lug boss and a circular-arch-shaped surface; circular-arch-shaped connecting rods are arranged at the two sides of the main body of the slip seat; the gate seat is internally provided with a circular-arch-shaped lug boss and a circular-arch-shaped surface; a gate seat base is arranged at the bottom of the gate seat; arc-shaped connecting rods are arranged at the two sides of the main body of the gate seat respectively. The process is performed according to the following steps: 1, a casting procedure; 2, a heat treatment procedure; 3, a machining procedure. The structure and the manufacturing and machining process of the power slip are changed and the quantity of single parts of the slip is reduced, so that the inner part of the slip has a better machinable property; meanwhile, the welding process among slip parts is reduced and the slip is simpler and more convenient to detach and repair.

Description

technical field [0001] The invention relates to the field of oil drilling equipment, in particular to a power slip and a manufacturing process. Background technique [0002] At the oil and gas development site, when drilling or workover, it is necessary to lift or lower the pipe string (drill pipe, sucker rod, coiled tubing, casing, etc.). In the process of tripping the pipe string, it is necessary to use slips to fix the pipe string at the wellhead. At present, the advanced power slips used in the oil drilling and production equipment market have a complex structure. The slip seat, door seat, and roof cover are formed by pair welding of multiple single pieces. There are many single pieces, and the welding process is long. The finished product is not easy to meet the design. Due to the quality requirements, the internal machinability of the slip seat and the door seat is low due to the welded parts, and the slip seat and the roof cover are welded together, which is very inc...

AI Technical Summary

Problems solved by technology

At present, the advanced power slips used in the oil drilling and production equipment market have a complex structure. The slip seat, door seat, and roof cover are formed by pair welding of multiple single pieces. There are many single pieces, and the welding process is long. The finished product is not easy to meet the design. Due to the quality requirements, the internal machinability of the slip seat and the door seat is low due to the welded parts, and the slip seat and the roof cover are welded together, which is very inconvenient when the slips need to be repaired or maintained on site

For example, the utility model patent CN203655185U describes a kind of column power slip that can quickly replace the slip body. The whole is mostly welded and formed, and the processing technology is complicated; the fully automatic hydraulic slip described in the invention patent CN103216199AA has many single parts and many welding points, which will undoubtedly increase the difficulty of processing and the processing cycle. At the same time, its slip There are through holes and telescopic shafts on the tile seat, which will undoubtedly increase the volume of the slip seat and increase the manufacturing and processing costs of the slips; the utility model patent CN204225800U describes a detachable oil pipe string hydraulic power slip , it has many single pieces, the slip seat adopts two-lobed type, the overall strength is reduced, the structure is complex and huge, and it is inconvenient to process, disassemble and maintain

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