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Tubing & Casing Coupling

Tubing & Casing Coupling

The end of the tubing is connected with the inner wall of the coupling by a tapered thread, and the end of the coupling body is connected with the oil pipe by a flat thread with the same thread and pitch. It has the characteristics of alleviating the stress concentration at the root of the outer thread of the oil pipe connected by a single taper thread, and is not easy to cause fatigue fracture, and the connection effect is good. Effectively prevent oil well pipe string breakage accidents.
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Product Details

The end of the tubing is connected with the inner wall of the coupling by a tapered thread, and the end of the coupling body is connected with the oil pipe by a flat thread with the same thread and pitch. It has the characteristics of alleviating the stress concentration at the root of the outer thread of the oil pipe connected by a single taper thread, and is not easy to cause fatigue fracture, and the connection effect is good. Effectively prevent oil well pipe string breakage accidents.

 Features ：

The coupling adopts phosphating treatment, which has good wear resistance and corrosion resistance, and the thread has strong anti-adhesion

Classification ：

Couplings are divided into tubing couplings and casing couplings

The tubing coupling is mainly a kind of oil field drilling tool, which is used for the connection of the oil pipe. Effectively prevent oil well pipe string breakage accidents.

Tubing coupling structure: The end of the oil pipe is connected to the inner wall of the coupling by a tapered thread, and the end of the coupling body is connected to the oil pipe by a flat thread with the same thread and pitch. It has the characteristics of alleviating the stress concentration at the root of the outer thread of the oil pipe connected by a single taper thread, and is not easy to cause fatigue fracture, and the connection effect is good. Effectively prevent oil well pipe string breakage accidents.

Main buckle types: NU (not thickened), EU (thickened), TBG (not thickened), UP-TBG (thickened) special buckle, etc. Couplings of various specifications, various lengths, and various materials can be processed according to customer requirements and order drawings.

Coupling material: J55, K55, N80, L80, C-90, C95, T95, P110, P110S, stainless steel, etc.

Executive standard: API-5CT API-5L

The pipe used to make the coupling is called the oil casing coupling material. Each well uses several layers of casing according to different drilling depths and geological conditions. Cement cementing is used after the casing is lowered into the well. Unlike oil pipes and drill pipes, it cannot be reused and is a one-time consumable material.

Button type: short round (STC), long round (LC), trapezoidal (BC)

Material: J55 K55 N80 L80 P110

Standard: API SPEC 5CT, API SPEC 5B



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