Blowout-preventing upward movement-preventing device for abnormal high pressure operation well and method

Abstract

The invention discloses a blowout-preventing upward movement-preventing device for an abnormal high pressure operation well and a method. The blowout-preventing upward movement-preventing device comprises a cast iron cylinder, an upward movement-preventing core, a safe clamp and a guiding groove; a safe clamp shell is arranged in the safe clamp, two clamp bodies with semicircular openings are arranged inside the safe clamp shell, clamping teeth are arranged on the inner sides of the clamp bodies and used for clamping a pipe column, and a lead screw is fixedly connected to the outer side of each clamp body; the safe clamp and the upward movement-preventing core are connected through a bolt; the guiding groove is in a hollow frustum shape with an opening, and is connected to the lower portion of the safe clamp shell through a fastening bolt; an inner cavity with an open pore in a cone frustum shape is adopted inside the cast iron cylinder and matched with the upward movement-preventing core, and embedding and coupling of the upward movement-preventing core can be realized; a flange connecting hole is formed in an external lug plate of the cast iron cylinder, and the cast iron cylinder is fixedly linked with a well control device through a flange via the flange connecting hole. By the utilization of the device and the method, control over the whole process of pipe column lifting and lowering can be realized, and the aims of preventing blowout and upward movement and velocity-limiting lifting are realized.

Description

technical field [0001] The invention relates to an anti-roofing and anti-channeling device for operating wells applied in the field of oil and gas field development. Background technique [0002] At present, the construction team usually uses blowout preventers or steel wire ropes to control the pipe string after the phenomenon of pipe string going up and down during the overhaul operation, and uses tank trucks to transport the pressure and release the pressure, and then proceed to the next step of construction after the pressure is reduced. . However, there are several problems in the process of processing: first, the pressure relief time of the tank trucks is unstable, the invalid laying time is long, and the operation and construction efficiency is low; Hidden danger; the 3rd, the main function of the commonly used single gate wrench manual blowout device is to prevent blowout, although it can control the pipe string up to a certain degree, there are potential safety haz...

AI Technical Summary

Problems solved by technology

The anti-topping and anti-channeling device and method of the operation well can remove the limitation of the steel wire rope on the upper space of the wellhead, and solve the operation process caused by dead oil and dead wax in the oil-water well, incomplete unsealing of the packer, and unsealing and sealing of the well string. A series of problems caused by the upward movement of the middle pipe string and the inability to lift the pipe string normally

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