Bimetallic materials for oilfield applications

Abstract

Corrosion resistant and/or lightweight bimetallic cylinders used in tools and electric cables, including core surrounded by corrosion resistant alloy outer cladding materials, where the alloy clad may include such alloys as beryllium-copper based alloys, nickel-chromium based alloys, superaustenitic stainless steel alloys, nickel-cobalt based alloys, nickel-molybdenum-chromium based alloys, and the like. The core may be a low density core based substantially upon titanium or titanium alloys.

1 . A bimetallic corrosion resistant cylinder comprising a corrosion resistant alloy outer clad and a core, wherein the cylinder is used in wellbore equipment.  
     
     
         2 . The cylinder according to  claim 1  wherein the core is a low density core.  
     
     
         3 . The cylinder according to  claim 2  wherein the low density core is substantially titanium or titanium alloy.  
     
     
         4 . The cylinder according to  claim 1  wherein a bonding layer is placed between the core and the corrosion resistant alloy outer clad.  
     
     
         5 . The cylinder according to  claim 1  wherein the cylinder is a solid body.  
     
     
         6 . The cylinder according to  claim 1  wherein the cylinder is a hollow body.  
     
     
         7 . The cylinder according to  claim 6  wherein the inner surface of the hollow body has a corrosion resistant alloy inner clad disposed thereon.  
     
     
         8 . The cylinder according to  claim 1  as used to form a WHE-pressure control device, a chain, a marine termination, a tool housing, a tractor housing, a riser, a casing tube, a pipe, a coil tubing, a spring, a fastener, a coupler, a centralizer, surface production facilities, wellhead equipment, dowhhole completion hardware, control lines, or BHA assemblies.  
     
     
         9 . The cylinder according to  claim 2  wherein the low density core is titanium or a titanium alloy, and the corrosion resistant alloy outer clad is an alloy comprising nickel in an amount from about 10% to about 60% by weight of total alloy weight, chromium in an amount from about 15% to about 30% by weight of total alloy weight, molybdenum in an amount from about 2%f to about 20% by weight of total alloy weight, and cobalt in an amount up to about 50% by weight of total alloy weight.  
     
     
         10 . The cylinder according to  claim 1  comprising no greater than one corrosion resistant alloy outer clad, wherein the corrosion resistant alloy outer clad comprises an alloy selected from the group consisting of beryllium-copper based alloys, copper-nickel-tin based alloys, superaustenitic stainless steel alloys, nickel-cobalt based alloys, nickel-chromium based alloys, nickel-molybdenum-chromium based alloys, and any mixtures thereof.  
     
     
         11 . The cylinder according to  claim 1  comprising no greater than one corrosion resistant alloy outer clad, wherein the corrosion resistant alloy outer clad comprises a nickel-chromium based alloy or a nickel-cobalt based alloy.  
     
     
         12 . The cylinder according to  claim 1  comprising no greater than one corrosion resistant alloy outer clad, wherein the corrosion resistant alloy outer clad is extruded over the low density core, and the clad and core are drawn to a desired diameter.  
     
     
         13 . The cylinder according to  claim 1  comprising no greater than one corrosion resistant alloy outer clad, wherein the corrosion resistant alloy outer clad is at least one sheath of corrosion resistant alloy, and the clad is formed over the low density core, and wherein the clad and core are drawn to a desired diameter.  
     
     
         14 . The cylinder according to  claim 2  wherein the low density core has a density up to about 4.8 g/cm 3 .  
     
     
         15 . An electric cable according to  claim 14  wherein the low density core has a density from about 4.2 g/cm 3  to about 4.8 g/cm 3 .  
     
     
         16 . The cylinder according to  claim 2  wherein the cylinder is used to form armor wires for electrical cables.  
     
     
         17 . The cylinder according to  claim 1  in which the cylinder is abrasion and corrosion resistant, galling and corrosion resistant, or abrasion, galling and corrosion resistant,  
     
     
         18 . A method of forming bimetallic corrosion resistant cylinder comprising: 
 a. providing a core,    b. bringing the core into contact with at least one sheath of corrosion resistant alloy material,    c. forming the sheet of corrosion resistant alloy material around the core, and drawing the combination of the alloy material and core to a final diameter to form the cylinder.    
     
     
         19 . The method according to  claim 18  wherein the core is a low density core.  
     
     
         20 . The cylinder according to  claim 19  wherein the low density core is substantially titanium or titanium alloy.  
     
     
         21 . The method according to  claim 18  wherein a bonding layer is placed between the core and the corrosion resistant material.  
     
     
         22 . The method according to  claim 18  wherein the cylinder is a solid body.  
     
     
         23 . The method according to  claim 18  wherein the cylinder is a hollow body.  
     
     
         24 . A method according to  claim 18  further comprising coating the low density core with a bonding layer before forming the sheath of corrosion resistant alloy material around the low density core.  
     
     
         25 . The method according to  claim 18  wherein the corrosion resistant alloy material is extruded over the core, and the clad and core are drawn to a desired diameter.