Screw protection cap of sleeve

Abstract

The invention discloses a screw protection cap of a sleeve. The screw protection cap comprises a screw protector body, an inner thread, a friction reduction belt, a skid resistance belt and a horizontal stripe, wherein the inner thread is arranged inside the screw protector body and is connected with a thread of the sleeve in a matching way, the friction reduction belt is formed by improving the inner diameter of the protector body and removing a local thread, the skid resistant belt is arranged at an adjacent place of the friction reduction belt and the horizontal stripe is axially arranged on the periphery of the skid resistance belt along the screw protector body. The screw protection cap of the sleeve is provided with the friction reduction belt, therefore a contact position between the screw protection cap and the sleeve can be reduced, the friction resistance can be reduced, and the screw protection cap can be easier dismounted from a male button; furthermore, the outer surface of the screw protection cap is provided with the skid resistance belt, the problem that a pair of chain tongs is likely to slide off when the screw protection caps of the chain tongs are in use, and the field operation safety can be improved. The screw protection cap provided by the invention is simple in structure, convenient to operate and low in investment cost, thereby being extensively applicable to the field of petroleum drilling.

Description

technical field [0001] The invention relates to the technical field of oil and gas field drilling, in particular to a casing wire protection cap. Background technique [0002] In oil and gas field drilling engineering, casing is needed, and the end of the casing has thread. In order to avoid bumping and damaging the thread during transportation, a casing cap in the form of a sheath should be installed at the end. The current bushing wire cap is in the form of an integral cap, and the whole interior is equipped with threads to cooperate with the threads of the bushing. However, if the wire cap cannot be disassembled, the operator often uses chain pliers to force the shackle and hit the loose buckle with a hammer, but the use of chain pliers to strengthen the shackle is easy to slip. Injury; and the hammer may damage the loose threaded thread, resulting in the failure of the bushing. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the techni...

AI Technical Summary

Problems solved by technology

The current bushing wire cap is in the form of an integral cap, and the whole interior is equipped with threads to cooperate with the threads of the bushing. However, if the wire cap cannot be disassembled, the operator often uses chain pliers to force the shackle and hit the loose buckle with a hammer, but the use of chain pliers to strengthen the shackle is easy to slip. Injury; and the hammer may damage the threaded buckle when it is knocked loose, causing the bushing to be scrapped

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