Adjustable flow guide pipe tool for installing rotary blowout preventer at wellhead of flow divider of offshore platform

Abstract

The invention provides an adjustable flow guide pipe tool for installing a rotary blowout preventer at a wellhead of a flow divider of an offshore platform, which is characterized in that a flow guide pipe adopts a tubular structure with a funnel-shaped upper part, a flow guide pipe quick joint is formed at the tail end of the flow guide pipe, a clamping pipe upper joint is formed at the head end of a clamping pipe, and the tail end of the flow guide pipe is connected with the head end of the clamping pipe; an outer-layer sleeve is connected to the middle of the clamping pipe in a sleeved mode, reinforcing ribs are evenly distributed between the outer wall of the clamping pipe and the inner wall of the outer-layer sleeve, a drainage hole penetrating through the clamping pipe is formed in the position, at the connecting position of the clamping pipe and the outer-layer sleeve, of the clamping pipe, and a clamping pipe lower connector is formed at the tail end of the clamping pipe. A base tool quick connector is formed at the head end of the base tool, and the tail end of the clamping pipe is connected with the head end of the base tool. According to the flow guide pipe tool, under the condition that a flow divider wellhead is not disassembled, a flow guide pipe is put down, connection and disconnection with the flow divider wellhead are achieved, operation efficiency is improved, zero discharge of the wellhead is achieved, and it is guaranteed that the wellhead is fixed firmly.

Description

technical field [0001] The invention relates to the technical field of pressure-controlled drilling and underbalanced drilling operations on offshore platforms with diverter wellheads, and more particularly to an adjustable diversion pipe tool for installing rotary blowout preventers at diverter wellheads on offshore platforms. Background technique [0002] At present, during pressure-controlled drilling and underbalanced drilling operations, the original land operation method is used. In view of the need to remove the diverter wellhead as a whole during the installation of the offshore platform with the diverter wellhead, the connection between the self-made return hose and the elevated tank is a 12-inch hard pipe, and the connection cannot be fully sealed, nor can the bell mouth be zero. Discharge, the wellhead shakes seriously when the wind, waves and currents are strong. SUMMARY OF THE INVENTION [0003] The invention overcomes the deficiencies in the prior art. Durin...

AI Technical Summary

Problems solved by technology

For offshore platforms with diverter wellheads, the diverter wellhead needs to be removed as a whole during installation. The connection between the self-made return hose and the elevated tank is a 12-inch hard pipe. The connection cannot be fully sealed, and the bell mouth cannot achieve zero. Discharge, the wellhead shakes seriously when the wind, waves and currents are strong

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