Low anti-jacking and anti-twisting pressurizing and clamping device and method

Abstract

The invention discloses a low anti-jacking and anti-twisting pressurization clamping device and method. The device comprises an outer shell assembly, a clamping mechanism and a lifting mechanism. The clamping mechanism is transversely installed on the outer shell assembly, and the clamping center line of the clamping mechanism is consistent with the center line of the outer shell assembly. The lifting mechanism is vertically installed on the outer shell assembly, namely, the upper end of the lifting mechanism is connected with the outer shell assembly, and the lower end of the lifting mechanism is connected with a blowout preventer of a wellhead. The pipe column can be clamped at any time for pressurization tripping, and installation operation is flexible and convenient; due to a low clamping structure, the working efficiency is improved; the clamping device can clamp a screw drill pipe column for pressurized drilling, the drilling speed is increased, the jacking force of the pipe column can be overcome when the anti-jacking pipe column is lifted, and safe operation of an oil-water well is achieved.

Description

technical field [0001] The invention relates to the technical field of oilfield wellhead safety auxiliary tools, in particular to a low-profile anti-top, anti-twist, pressurized clamping device and method. Background technique [0002] In the production process of medium and shallow sandstone reservoirs, due to the loose formation and large production pressure difference, the formation often produces serious sand, which leads to problems such as screen rupture or screen blockage, rapid rise of water cut, etc., the production effect of the oil well becomes poor, and the development value decreases. Small, the oil production plant will take temporary well closure measures, but as time goes by, these wells need to be re-exploited according to geological process adjustments or changes in the surrounding environment, and some need to be permanently closed. The simple well sealing plug is drilled out. [0003] Conventional drill plug milling operations in oil fields generally use...

AI Technical Summary

Problems solved by technology

In order to overcome the problems of low drilling efficiency and potential safety hazards during the existing drilling plug operation, the screw drilling tool of the utility model is located in the hydraulic cylinder, and the lower end of the hydraulic cylinder is fixed with a flange; the upper end of the hydraulic cylinder is connected with the anti-reverse assembly The completed end cover is fixedly connected; the upper end of the screw drilling tool is fixedly installed with a short joint, a piston, and a piston rod in sequence, and the piston is located in the hydraulic cylinder; the center of the short joint, piston, and piston rod has an axial through hole; the cement truck passes through the water hose, After the elbow, union and piston rod are fixedly connected in sequence, they communicate with the axial through hole of the piston rod; the anti-rotation assembly is installed on the outer circumference of the piston rod; there is a radial through hole under the end cover of the upper end of the hydraulic cylinder, The pressure pipeline is connected with the pressure test pump, and the pressure pipeline from the hydraulic cylinder to the pressure test pump is installed with a pressure relief valve and a hydraulic check valve in sequence.

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