Rotary mud blowout preventer for well mouth

Abstract

The invention discloses a rotary mud blowout preventer for a well mouth. The rotary mud blowout preventer comprises a substrate assembly, and a first telescopic boom, a second telescopic boom and a third telescopic boom mutually connected in a sleeving manner, wherein a rotary liquid cylinder is installed between the substrate assembly and the first telescopic boom, the top end of the third telescopic boom is connected with one end of an opening-closing stand column via a bolt, the other end of the opening-closing stand column is connected with a mud barrel, opening-closing hydraulic cylinders are symmetrically installed on two sides of the outer wall of the mud barrel, the bottom of the side wall of the mud barrel is connected with one end of a mud recycling assembly, and the other end of the mud recycling assembly is installed on the substrate assembly via a flange. According to the rotary mud blowout preventer for the well mouth provided by the invention, pollution to environment caused by spraying of residual mud in a drilling tool is effectively avoided, no mud remains in the drilling tool, and all mud is recycled, so that production cost is saved; the rotary mud blowout preventer is compact in structure and small in occupied area, without influencing the layout of a drilling floor; according to the rotary mud blowout preventer, remote, automatic and full-hydraulic control on the mud remained in the drilling tool is achieved, and thus the preventer is time-saving and labor-saving.

Description

technical field [0001] The invention relates to the technical field of oil drilling equipment, in particular to a wellhead rotary mud blowout preventer. Background technique [0002] During the oil drilling operation, when lifting the vertical root and unloading the single drilling tool, due to the fast lifting speed and the area of ​​the water eye of the drill bit is much smaller than the area of ​​the inner hole of the drill string, part of the mud stored in the drill string cannot flow into the ring in time. In the space, the mud liquid level is higher than the drilling floor plane, and the phenomenon of mud spraying is also inevitable. This not only causes pollution and wear to other equipment, and creates potential safety hazards; it also fails to recover the mud fluid, which increases the cost of drilling. [0003] At present, there are roughly two types of mud blowout preventers used in drilling rig equipment: the first type of mud blowout preventer uses a single hyd...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wellhead rotary mud blowout preventer to solve the problems of the existing mud blowout preventer with a lot of mud residue, unclean recovery, environmental impact and large footprint

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