Blowout preventing box of continuous oil pipe and drill rod

Abstract

The invention discloses a blowout preventing box of a continuous oil pipe and a drill rod. The blowout preventing box comprises a hollow hydraulic cylinder and a flange union connected through connecting rod bolts, and a set of valve assembly is arranged on the two connecting rod bolts opposite in the diameter direction respectively; the hollow hydraulic cylinder is arranged at a hydraulic inlet / outlet; a fixed sleeve is arranged in the cavity of the hollow hydraulic cylinder, an upper guide sleeve is sleeved at the upper end of the inner wall of the fixed sleeve, the upper guide sleeve and the interior of the flange union axially pass through the continuous pipe, a piston rod is arranged between the fixed sleeve and the hollow hydraulic cylinder, and the inner circumference of the lower section of the piston rod is provided with a seam allowance; and a middle guide sealing pressing sleeve and an inner cone guide spacing ring are sleeved on the inner circumference of the seam allowance, the inner circumference of the middle guide sealing pressing sleeve is sleeved with the continuous pipe, a main sealing ring and a lower guide sealing pressing sleeve are arranged between the inner cone guide spacing ring and the continuous pipe, and a hydraulic detection port is bypassed in the radial direction of the flange union. The pressure adjustment of the sealing cavity is convenient; time and labor are saved when the sealing ring is replaced; and the pressure of a wellhead can be detected in real time.

Description

technical field [0001] The invention belongs to the technical field of petroleum equipment manufacturing, and relates to a coiled tubing oil pipe and a drill pipe blowout preventer. Background technique [0002] The coiled tubing tubing and drill pipe blowout preventer is a blowout preventer for oil and gas wells with a press-up and lower coiled tubing and drill pipe. Coiled tubing drilling and workover technology is a new and gradually mature technology. It is in a technological advantage in directional drilling and underbalanced drilling. With the massive investment in research and development of coiled tubing and the continuous improvement of coiled tubing manufacturing technology and quality, The scope of application of coiled tubing drilling and workover technologies in oil and gas fields will continue to expand. However, the existing coiled tubing tubing and drill pipe blowout preventer have the following disadvantages: the pressure adjustment of the sealing cavity is...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a coiled tubing tubing and a drill pipe blowout preventer, which solves the inconvenient pressure adjustment of the sealing cavity in the prior art; when replacing the main sealing ring and the end face sealing ring, the parts that need to be disassembled are relatively large. Many, time-consuming and labor-intensive; the problem of not being able to detect the wellhead pressure in real time

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