Anti-abrasion device for drill pipe and casing pipe

Abstract

The invention provides an anti-abrasion device for a drill pipe and a casing pipe. The anti-abrasion device consists of a metal frame, a rubber sleeve and a locking block. Both sides of two semi-cylinder metal frames are correspondingly provided with a dovetail slide groove and a slide bar capable of axially sliding for fastening together respectively. A plurality of oblong holes are formed at the periphery of the metal frame. Two small dovetail slots are formed in the fastening gap respectively. Two semi-cylinder rubber sleeves are correspondingly arranged in the metal frame. A plurality of oblong fillets corresponding to the oblong holes on the metal frame are arranged outside the circumference of the rubber sleeve. The top of the oblong fillets extends out of the external surface of the metal frame and the external surface of the drill pipe joint. An arc rectangular locking block with slopes at both sides is arranged in the small dovetail slots at both sides of the metal frame.

Description

Technical field: [0001] The invention relates to the fields of petroleum and geological drilling, in particular to a drill pipe and casing wear preventer for drilling. Background technique: [0002] The emergence of extended-reach wells has a history of many years, mainly out of economic considerations, especially in the application of offshore oil and land production, which has exerted huge economic benefits. However, the extended-reach extension well has a very long and highly-inclined stabilizing section with a very large horizontal displacement. The measured wellbore has reached the depth of deep wells and ultra-deep wells. It is a comprehensive drilling technology for directional wells, horizontal wells, and ultra-deep wells. It is the most advanced drilling technology in the world at present. [0003] In the drilling process of horizontal wells, extended reach wells and ultra-deep vertical wells, the wear of drill pipes and casings is a serious problem. The previous c...

AI Technical Summary

Problems solved by technology

There are also several major problems in anti-wear joints. First, from the structural point of view, there is a non-rotating sleeve on the pup joint, and some have no seal, no rolling bearing, and no anti-wear material on the surface. If grains enter the gap of the "non-rotating sleeve", how much non-rotating probability the "non-rotating sleeve" has is worth discussing; there is also a certain wear and tear on the casing during the tripping process

Second, many threaded joints are added to the drill string, which adds more unsafe factors and dangers

Third, the surfaces of these anti-wear joints are all metal shells. When the drilling tool generates radial vibrations and collides with the casing, it can also cause problems such as casing and drill pipe tripping, deformation, and cement sheath damage.

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