Efficient uninterrupted circulating valve tool

Abstract

The invention discloses an efficient uninterrupted circulating valve tool which comprises a bypass valve assembly, a cylinder assembly and a clamping mechanism. The bypass valve assembly comprises a driving pipe, an elastic hinge, a valve plate and a valve seat; a valve groove and a side hole are formed in the wall of the valve seat; the valve plate is located in the valve groove; one end of the valve plate is hinged to the top of the valve groove through the elastic hinge; the lower end of the driving pipe is in sliding sealing connection with the valve seat; a pump cylinder assembly comprises an upper connector, a middle cylinder, a lower connector and a lining; the valve seat is packaged in the middle cylinder through the lower connector; the lining is packaged in the middle cylinder through the upper connector; the upper end of the driving pipe is connected with the lining in a sliding and sealing mode; an opening communicated with the side hole is formed in the wall of the middle cylinder; the clamping mechanism comprises a hydraulic tong head and a lifter; and the lifter is connected with the upper end of the hydraulic tong head and used for pushing the driving pipe to move up and down. According to the efficient uninterrupted circulating valve tool, the driving pipe moves up and down to switch a main channel and a side channel, so that continuous circulation of drilling fluid can be kept during single connection, and stable equivalent circulation density is realized during the whole drilling period.

Description

technical field [0001] The invention relates to the technical field of petroleum equipment, in particular to a high-efficiency uninterrupted circulation valve tool. Background technique [0002] At present, the drilling problem of deep wells in complex strata has become an important barrier restricting the development of my country's oil and gas exploration and development. How to solve the main technical problems of deep well drilling in complex strata For wells with a liquid density window, the pump needs to be stopped and the circulation in the well needs to be interrupted during the connection of a single or vertical root. This not only increases the operation time, but also is prone to failures such as sand settling, well wall collapse, and even well kick after the interruption of the well circulation. It poses a great risk to work safety. Contents of the invention [0003] The purpose of the present invention is to provide a high-efficiency uninterrupted circulation v...

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Problems solved by technology

[0002] At present, the drilling problem of deep wells in complex strata has become an important barrier restricting the development of my country's oil and gas exploration and development. How to solve the main technical problems of deep well drilling in complex strata For wells with a liquid density window, the pump needs to be stopped and the circulation in the well needs to be interrupted during the connection of a single or vertical root. This not only increases the operation time, but also is prone to failures such as sand settling, well wall collapse, and even well kick after the interruption of the well circulation. Great risk to work safety

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