Oil well casing and tubing joint and production of same

Details Oil well casing and tubing joint and production of same Oil well casing and tubing joint and production of same

E - Fixed Constructions

21

B

285/63, 166/68,

E21B 17/08 (2006.01) C25D 5/10 (2006.01) C25D 5/36 (2006.01) C25D 7/04 (2006.01) F16L 15/00 (2006.01) F16L 58/18 (2006.01) E21B 17/042 (2006.01)

Patent

CA 1183773

ABSTRACT OF THE DISCLOSURE: A joint for used in connecting oil well casing and/or tubing and method of producing same are disclosed. The joint with improved metal-to-metal sealing properties as well as improved resistance to galling is made of an alloy steel containing 10% or more by weight of Cr and comprises a metal sealing portion and a threaded portion provided with an acti- vating layer of a metal or an alloy selected iron, nickel, zinc, cobalt, copper, manganese, chromium and alloys thereof, and an electrodeposited layer of a metal or an alloy selected from iron, copper, zinc, chromium, nickel, and alloys thereof.

409153

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