Component for drilling and operating hydrocarbon wells

Abstract

The tubular component ( 30 ) comprises a main body ( 32 ) of rotation about a longitudinal axis (X) of the component ( 30 ) provided, at least at one of its ends ( 34 B), with a first connector ( 36 B) for attaching the component ( 30 ) to another tubular component ( 30 ). The component ( 30 ) is moreover intended to be at least temporarily gripped in a peripheral zone (Z, Z 1 , Z 2 ) by means for retaining the component ( 30 ) on the operating facility ( 10 ). The component ( 30 ) comprises inside the zone (Z, Z 1 , Z 2 ) a coating ( 58 ) for protecting the component ( 30 ) against mechanical damage likely to be caused by the retaining means. In particular, the coating ( 58 ) being produced from a material with a hardness greater than the hardness of the material forming the component but less than a value of 70 HRC.

1 . Tubular component ( 30 ) of a landing string for oil or gas exploitation from an operating facility ( 10 ), comprising a main body ( 32 ) of rotation about a longitudinal axis (X) of the component ( 30 ) provided, at least at one of its ends ( 34 A,  34 B), with a first connector ( 36 B) for attaching the component ( 30 ) to another tubular component ( 30 ), the component ( 30 ) moreover being intended to be at least temporarily gripped in a peripheral zone (Z) by means ( 40 ) for retaining the component ( 30 ) on the facility ( 10 ), characterized in that the component ( 30 ) comprises, inside the clamping zone (Z), a coating ( 58 ) for protecting the component ( 30 ) against mechanical damage likely to be caused by the retaining means, the coating being produced from a material with a hardness greater than the hardness of the material forming the component ( 30 ) but less than a value of 70 HRC. 
     
     
         2 . Component ( 30 ) according to the previous claim, in which the coating ( 58 ) is a sacrificial coating. 
     
     
         3 . Component ( 30 ) according to one or other of the previous claims, in which the hardness of the coating ( 58 ) increases progressively in the direction from the component ( 30 ) to the coating ( 58 ). 
     
     
         4 . Component ( 30 ) according to any one of the previous claims, in which the coating ( 58 ) is formed by a plurality of layers. 
     
     
         5 . Component ( 30 ) according to any one of the previous claims, in which the clamping zone (Z) extends between an end face of the first connector ( 36 B) as far as at most one-third of the body ( 32 ). 
     
     
         6 . Component ( 30 ) according to one or other of the previous claims, in which the first connector ( 36 B) is of the type having a female thread. 
     
     
         7 . Component ( 30 ) according to the previous claim, being provided, at the other ( 34 A) of its ends ( 34 A,  34 B), with a second connector ( 36 A) with a male thread. 
     
     
         8 . Component ( 30 ) according to any one of the previous claims, in which, the connector or connectors ( 36 A,  36 B) being connected to the body ( 32 ) by welding, forming a support ( 38 ) for joining the connector ( 36 A,  36 B) to the body ( 32 ), the coating ( 58 ) leaves the joint support ( 38 ) exposed. 
     
     
         9 . Component ( 30 ) according to any one of the previous claims, in which the thickness of the body ( 32 ) is greater than 12.7 mm. 
     
     
         10 . Component ( 30 ) according to any one of the previous claims, in which the coating ( 58 ) has a roughness greater than the surface roughness of the tubular component ( 30 ) in order to facilitate the adherence of the retaining means ( 42 ) to the body ( 32 ) of the component ( 30 ). 
     
     
         11 . Component ( 30 ) according to any one of the previous claims, in which the thickness of the coating ( 58 ) is greater than 1 mm and preferably greater than 2 mm. 
     
     
         12 . Component ( 30 ) according to any one of the previous claims, in which the coating ( 58 ) is formed by a layer obtained by thermal spraying, for example of the electric arc type, or by electroplating. 
     
     
         13 . Component ( 30 ) according to any one of the previous claims, the coating ( 58 ) is formed by a metal alloy comprising at least one or more main elements chosen from nickel, chromium, molybdenum, tungsten, boron. 
     
     
         14 . Component ( 30 ) according to the previous claim, in which the metal alloy comprises at least one or more secondary elements chosen from silicon, carbon, chromium, boron, vanadium, titanium, iron and aluminium. 
     
     
         15 . Component ( 30 ) according to any one of the previous claims, in which the zone (Z) starts at the end of the body and extends for example over approximately 1.5 metres.