A marine deepwater well tubing packer

Abstract

The invention discloses an ocean deep well tubing packer. The tubing packer comprises a main tube. Retaining blocks are connected onto the outer wall of the main tube, and a central tube is sleeved on the outer wall of the main tube. A slip cover, a slip and a lower cone are sleeved on the outer wall of the upper portion of the central tube. A rubber cylinder, a setting sleeve, a lock ring and a setting outer tube are sleeved on the outer wall of the lower portion of the central tube from the top to the bottom successively. The tail end of the central tube is connected with an inner tube, and the lower portion of the setting outer tube is sleeved on the outer wall of the inner tube. The lower end of the inner tube is connected with a lower joint, the lower joint is disposed on the outer wall of the tail end of the main tube, and an elastic clamping claw is sleeved on the outer wall of the lower joint. According to the tubing packer, a mechanical setting mode is used, so that pollution to oil reservoirs during well killing setting of hydraulic setting tubing packers is prevented; the tubing packer is used for descending to the tubing to perform temporary plugging on oil reservoirs, and potential safety hazards caused by work under pressure are prevented.

Description

technical field [0001] The invention belongs to the field of well completion tools in the development of oceanic deepwater wells, and in particular relates to an oilpipe packer for oceanic deepwater wells. Background technique [0002] Compared with conventional well operations, marine deepwater oil and gas wells have the characteristics of high downhole pressure, high requirements for formation protection, and high requirements for environmental protection. During the tripping of the production string, a tubing packer is required to temporarily block the tubing during snubbing operations; a large-diameter tubing packer is required to hang completion tools through the tubing. [0003] Currently, the tubing packers used downhole generally have the following disadvantages: [0004] 1. The mechanical packer can only be sealed at a limited position; [0005] 2. The hydraulic ball-pitching packer can be set at any section in the pipe string, but when the downhole pressure is to...

AI Technical Summary

Problems solved by technology

[0004] 1. The mechanical packer can only be sealed at a limited position;

[0005] 2. The hydraulic drop-ball packer can be set at any section in the pipe string, but when the downhole pressure is too high, it needs to be well-killed before the seat is pressed, which is easy to cause pollution to the oil layer;

[0006] 3. The diameter of the tubing packer is small, which brings difficulties to the later operation

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