Thick oil steam flooding releasing two-way anchoring tubing anchor

Abstract

The invention provides a thick oil steam flooding releasing two-way anchoring tubing anchor. The thick oil steam flooding releasing two-way anchoring tubing anchor comprises a slip, a central tube, a lower cone, a hydraulic cylinder barrel and a fixing piston. The upper end of the central tube is sleeved with the slip, the central tube is sleeved with the lower cone in a sliding mode, the upper portion of the lower cone abuts against the slip, and the slip can move upwards or downwards in the axial direction of the central tube along with the lower cone so as to achieve anchoring or releasing operation. The middle of the central tube is fixedly sleeved with the fixing piston, the fixing piston is sleeved with the hydraulic cylinder barrel in a sliding mode, the upper end of the hydraulic cylinder barrel is fixedly connected with the lower end of the lower cone in a sealed mode, a hydraulic cavity is defined by the central tube, the lower cone, the hydraulic cylinder barrel and the fixing piston, and a through hole is formed in the position, corresponding to the hydraulic cavity, of the central tube. An elastic piece is connected to the lower end of the fixing piston, a connector with which the central tube is sleeved in a sliding mode is arranged below the elastic piece, the upper end of the connector is fixedly connected with the lower end of the hydraulic cylinder barrel, and the elastic piece can be compressed by the connector. By the adoption of the thick oil steam flooding releasing two-way anchoring tubing anchor, setting operation is firm, and the reliable releasing performance is achieved.

Description

technical field [0001] The invention relates to an anchoring device for thermal recovery of heavy oil in the development of oil and gas fields, in particular to a two-way anchoring oil pipe anchor for steam flooding and unsealing of heavy oil. Background technique [0002] At present, the tubing anchors used in the development of oil and gas fields are all used in thin oil production strings. The tubing anchors used in thin oil development are mostly used in the production strings of oil well pumps. The anchored tubing prevents the string from elongating and increases the pump efficiency. For thermal recovery processes such as heavy oil steam flooding and steam huff and puff, due to poor downhole working conditions, high well temperature and long production cycle, the heavy oil thermal recovery process will cause frequent up and down peristalsis of the pipe string during production adjustment. Advanced tubing anchors cannot meet the requirements of heavy oil thermal recovery...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the prior art packer used to prevent the peristalsis of the tubing string is not easy to be unsealed, the present invention provides a heavy oil steam flooding unsealed two-way anchored tubing anchor, which is securely set and can use a triple unseal mechanism to unseat the tubing anchor. Decapsulation with reliable decapsulation performance

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