A Deepwater Drilling Surface Conduit Feeding Tool

Abstract

The invention belongs to the field of offshore oil and gas drilling, and in particular relates to a tool for sending in a surface conduit during deepwater drilling, which is used to send the conduit into place and continue drilling with a drill pipe that can be released. Deepwater drilling surface conduit delivery tool, including: mandrel, inner sleeve, outer sleeve, and body; where: the inner sleeve, outer sleeve, and body are arranged in sequence outside the mandrel; the inner sleeve can be up and down relative to the mandrel Sliding but not rotating, the outer sleeve and the inner sleeve are connected by a transmission thread pair, and the body is located on the inner sleeve; the stop pawl penetrates the body and can slide in the horizontal radial direction; the anti-rotation pin penetrates the body and the outer sleeve, so that The outer sleeve can only move up and down in the body and cannot rotate. The invention realizes the detachment of the drilling tool from the conduit, and continues the second-cut drilling, which can realize the lateral return of cuttings carried by the drilling fluid, prevent the accumulation of cuttings near the wellhead and hinder the observation of the indicator rod, and provide effective support for the tool body , and has the function of preventing the rotation of the feeding tool and the catheter head.

Description

technical field [0001] The invention belongs to the field of offshore oil and gas drilling, and in particular relates to a tool for sending in a surface conduit during deepwater drilling, which is used to send the conduit into place and continue drilling with a drill pipe that can be released. Background technique [0002] In offshore deepwater drilling, the surface conduit is the first layer of casing installed during the construction of the entire deepwater oil well, and it provides structural support for all subsequent casings and wellhead equipment. Running the surface conduit by jetting down the conduit has the advantages of saving drilling time, eliminating the need for cementing and protecting the formation, and its operation requires efficient and reliable running tools. [0003] At present, the research on the surface conduit feeding tool for deepwater drilling in my country is still in its infancy. Most of the operators of the jet down conduit technology used in de...

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Problems solved by technology

[0003] At present, the research on the surface conduit feeding tool for deepwater drilling in my country is still in its infancy. Most of the operators of the jet down conduit technology used in deepwater drilling in the South China Sea are foreign oil companies. They only provide on-site services and do not disclose the technology and sales products to the public. tools, its key parts and core data are kept secret, and the operating costs are high, so it has brought many difficulties to deepwater drilling operations in our country

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