Split tubing head and electric pump tubing wellhead passing construction method
A technology of oil pipe head and oil pipe, which is applied in the direction of drilling pipe, casing, drilling equipment, etc., can solve the problems of poor operation timeliness and influence on oil production efficiency, and achieve the effect of improving the maintenance efficiency of electric pumps
Pending Publication Date: 2022-04-12
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0002] The existing production string structure is that the electric pump and the tubing are connected together and run downhole, and the cable is bound to the outside of the tubing. This process faces the need to move the whole tubing string in the later workover and inspection of the pump, and the operation time is poor, which seriously affects the later oil recovery efficiency.
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Embodiment
[0027] Such as figure 1 and figure 2 As shown, a split oil pipe head includes an upper oil pipe head 9 and a lower oil pipe head 2;
[0028] The first main hole 9-1 and the first secondary hole 9-2 which are parallel and disconnected are formed in the upper oil pipe head 9, and the upper part of the first main hole 9-1 is formed in the oil pipe for connecting with the oil pipe 1. Thread, the lower part of the first main channel 9-1 forms a cylindrical groove 9-3 for connecting with the lower oil pipe head;
[0029] The second main channel 2-1 and the second auxiliary channel 2-2, which are parallel and connected, are formed in the lower oil pipe head 2, and the two form a Y-shaped channel structure. The groove 9-3 is matched with the protruding cylindrical structure 2-3, and the upper part of the second main hole 2-1 is formed with an oil pipe internal thread for connecting with the oil pipe 1.
[0030] In this embodiment, a cable suspension 8 is arranged in the second sec...
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The invention discloses a split tubing head and an electric pump passing tubing wellhead construction method, the split tubing head comprises an upper tubing head and a lower tubing head, the process and a matched device solve the problem of moving a tubular column during electric pump overhaul, under the condition that an oil pipe is not moved, the electric pump can be lifted out of the oil pipe through a cable only through wellhead operation, and the construction efficiency is greatly improved. The inner diameter of the oil pipe required by the technology is large, the factor that the outer diameter of the electric pump affects tripping-in is mainly considered, meanwhile, a wellhead oil pipe head is changed into a split type design from an existing conventional integrated type design, and the technology can greatly improve the maintenance efficiency of the electric pump in the oil extraction stage.
Description
technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a construction method for a split oil pipe head and an electric pump passing through the oil pipe wellhead. Background technique [0002] The existing production string structure is that the electric pump and the tubing are connected together and run downhole, and the cable is tied to the outside of the tubing. This process faces the need to move the whole tubing string in the later workover and inspection of the pump, and the operation time is poor, which seriously affects the later oil recovery efficiency. . Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a construction method for split tubing heads and electric pumps passing through the tubing wellhead. [0004] The present invention is achieved through the following technical solutions: [0005] A split tubing ...
Claims
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IPC IPC(8): E21B17/02E21B17/042
Inventor 李宁黄毓祥左凯耿旭占刘玉立谢昊李振坤郝宙正柴希伟任兴华吴雪涛
Owner CHINA NAT OFFSHORE OIL CORP