Drill pipe straightening and anti-wear device for riser section in deepwater drilling

Abstract

The invention discloses a righting and anti-abrasion device for deepwater drilling water-insulation pipe section drill pipes. The righting and anti-abrasion device comprises drill pipe connecting pipes, rolling wheel supporting frames, rolling wheels, rolling wheel arresting cylinders, sealing rings, protective shells, supporting columns, supporting shells, rubber strips, screws and screw anti-abrasion gaskets, wherein the two ends of each drill pipe connecting pipe are provided with an internal thread and an external thread. The drill pipe connecting pipes are in threaded connection with thedrill pipes to rotate along with the drill pipes, the rolling wheel arresting cylinders are connected with the protective shells, and the outer portions of the protective shells are fluid flow passages; the supporting columns are arranged in the passages, the rubber strips are arranged on the supporting shells, and the rubber strips achieve the effect of buffering extrusion of the supporting shells and water-insulation pipes; and under the effect of the rolling wheels, the supporting shells and the water-insulation pipes do not conduct relative movement, and the righting and anti-abrasion purposes of the drill pipes and the water-insulation pipes in the ocean current movement and normal drilling processes are achieved. The righting and anti-abrasion device has the advantages that the righting and anti-abrasion device is completely supported to the water-insulation pipes, the drill pipes are fixed to the center of a borehole, rotation of the drill pipes only causes rotation of the rolling wheels, and the righting and anti-abrasion effects are achieved.

Description

technical field [0001] The invention relates to the fields of fluid mechanics and oil well drilling and production anti-wear technology, and relates to a drill pipe straightening and anti-wear device for deepwater drilling riser sections. Background technique [0002] During deepwater drilling operations, the riser connects the platform and the subsea blowout preventer, and the drill pipe enters the formation through the riser. The riser is easily deformed by the load of the marine environment, and thus contacts the drill pipe, resulting in extrusion and sliding friction. This will cause great damage to the drill pipe and the riser. If the riser is worn out, serious accidents will occur. Therefore, our technicians have developed various centralizers and anti-wear devices to stabilize the drilling tool and reduce friction. There is still a lot to be desired. For example, patent No. CN201620765197.2, the outer wall of the centralizer body is evenly provided with mounting seat...

AI Technical Summary

Problems solved by technology

[0002] During deepwater drilling operations, the riser connects the platform and the subsea blowout preventer, and the drill pipe enters the formation through the riser. The riser is easily deformed by the load of the marine environment, and thus contacts the drill pipe, resulting in extrusion and sliding friction. This will cause great damage to the drill pipe and the riser. If the riser is worn out, serious accidents will occur. Therefore, our technicians have developed various centralizers and anti-wear devices to stabilize the drilling tool and reduce friction. still leaves a lot to be desired

For example, patent No. CN201620765197.2, the outer wall of the centralizer body is evenly provided with mounting seats, the mounting seat is provided with a tank body, and a universal ball is embedded in the tank body, and the universal ball can be placed inwardly in the tank body. Or move outward, and a cushioning device is provided between the bottom of the tank body and the outer bottom of the universal bead, but the universal bead of the centralizer is easily damaged, and the spring-based cushioning device is prone to failure, and the square edges and corners are harmful to drilling The liquid has a great blocking effect and is easy to damage the device

Another example is patent CN201620392589.9, which cannot be firmly installed in a certain fixed position of the drill pipe and is easy to fall off, which may cause accumulation of anti-wear sleeves somewhere in the wellbore trajectory, and the fluid passages on the anti-wear sleeves are dislocated, resulting in channel blockage

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