Combination cable guard and centralizer device for use with downhole tubing strings

Abstract

A combination cable guard and centralizer device, comprising an arcuate-shaped elongate base member having tapered ends, a pair of first hinge-housing portions wherein each of said pair is at an opposite end of a first elongate edge, and an opposite first elongate edge has a pair of spaced-apart channels for receiving and demountably engaging therein a shank portion and a flanged head portion of a bolt, and (ii) a complementary arcuate-shaped elongate upper member having tapered ends, a second hinge-housing portion in rotational hinged communication with the pair of first hinge-housing portions. The upper member has a second pair of channels for rotationally receiving therein a cylindrical rod having a female-threaded bore therethrough, and a third set of channels for receiving therethrough a male-threaded portion of the bolt wherein the male-threaded bolt is threadably engaged with the female-threaded bore of the cylindrical rod.

1 . A combination cable guard and centralizer device for demountable engagement with a downhole tubing string, comprising:
 an arcuate-shaped elongate base member having tapered ends, a first outer surface, a first inner surface, a first elongate edge of the base member having a first pair of hinge-housing elements with bores therethrough wherein each of said first pair is at one end of the first elongate edge, and an opposite first elongate edge having a first pair of spaced-apart channels for receiving and demountably engaging therein each of said first pair of spaced-apart channels one end of a self-retaining bolt assembly, and wherein said arcuate-shaped elongate base member has a matching pair of spaced-apart orifices therethrough, and wherein said first inner surface has a set of outward-extending knurled projections projecting inward from each end of the arcuate-shaped elongate base member;   a complementary arcuate-shaped elongate upper member having tapered ends, a second outer surface, a second contoured inner surface, a second elongate edge with a second pair of hinge-housing elements with bores therethrough wherein each of said second pair is at one end of the second elongate edge wherein the second pair of hinge-housing elements is complementary to and cooperable with said first pair of hinge-housing elements, and an opposite second elongate edge having a second pair of spaced-apart channels complementary to the first set of spaced-apart channels for receiving and demountably engaging therein the other end of the self-retaining bolt assembly, and wherein said arcuate-shaped elongate upper member has a matching pair of spaced-apart orifices therethrough, and wherein said second inner surface has at least two longitudinal channels extending therethrough for engaging cables or conduits therein; and   a hinge pin interconnecting each pair of complementary first hinge-housing elements and the second hinge-housing elements.   
     
     
         2 . The combination cable guard and centralizer device of  claim 1 , wherein the arcuate-shaped elongate base member has two or more matching pairs of spaced-apart orifices therethrough. 
     
     
         3 . The combination cable guard and centralizer device of  claim 1 , wherein the arcuate-shaped elongate upper member has two or more matching pairs of spaced-apart orifices therethrough. 
     
     
         4 . The combination cable guard and centralizer device of  claim 1 , wherein the opposite second elongate edge of the arcuate-shaped elongate upper member has a pair of feet extending therefrom, said pair of feet provided for engagement with the opposite first elongate edge of the arcuate-shaped elongate base member. 
     
     
         5 . The combination cable guard and centralizer device of  claim 1 , wherein the inner surface of the arcuate-shaped elongate upper member is provided with a centrally positioned outward projecting compression pad projecting therefrom. 
     
     
         6 . The combination cable guard and centralizer device of  claim 1 , wherein the set of outward-extending knurled projections on the first inner surface of the arcuate-shaped elongate base member extends from one end to the other end of the arcuate-shaped elongate base member. 
     
     
         7 . The combination cable guard and centralizer device of  claim 1 , wherein the set of outward-extending knurled projections consists of a plurality of repeating conical projections, a plurality of repeating spherical projections, a plurality of repeating spheroid projections, a plurality of repeating ellipsoid projections, or a plurality of repeating pyramidal projections. 
     
     
         8 . The combination cable guard and centralizer device of  claim 1 , wherein the set of outward-extending knurled projections consists of a plurality of repeating ridges. 
     
     
         9 . The combination cable guard and centralizer device of  claim 1 , wherein the first inner surface of the arcuate-shaped elongate base member is provided with a second set of outward-extending knurled projections projecting inward from each end of the arcuate-shaped elongate base member. 
     
     
         10 . The combination cable guard and centralizer device of  claim 9 , wherein the second set of outward-extending knurled projections on the first inner surface of the arcuate-shaped elongate base member extends from one end to the other end of the arcuate-shaped elongate base member. 
     
     
         11 . The combination cable guard and centralizer device of  claim 9 , wherein the second set of outward-extending knurled projections consists of a plurality of repeating conical projections, a plurality of repeating spherical projections, a plurality of repeating spheroid projections, a plurality of repeating ellipsoid projections, or a plurality of repeating pyramidal projections. 
     
     
         12 . The combination cable guard and centralizer device of  claim 9 , wherein the second set of outward-extending knurled projections consists of a plurality of repeating ridges. 
     
     
         13 . The combination cable guard and centralizer device of  claim 1 , wherein the second inner surface of the arcuate-shaped elongate upper member is provided with a set of outward-extending knurled projections projecting inward from each end of the arcuate-shaped elongate base member. 
     
     
         14 . The combination cable guard and centralizer device of  claim 13 , wherein the set of outward-extending knurled projections on the first inner surface of the arcuate-shaped elongate base member extends from one end to the other end of the arcuate-shaped elongate base member. 
     
     
         15 . The combination cable guard and centralizer device of  claim 13 , wherein the set of outward-extending knurled projections consists of a plurality of repeating conical projections, a plurality of repeating spherical projections, a plurality of repeating spheroid projections, a plurality of repeating ellipsoid projections, or a plurality of repeating pyramidal projections. 
     
     
         16 . The combination cable guard and centralizer device of  claim 13 , wherein the set of outward-extending knurled projections consists of a plurality of repeating ridges. 
     
     
         17 . The combination cable guard and centralizer device of  claim 1 , additionally comprising a compressible collar affixed to an inner-facing surface of the elongate upper member. 
     
     
         18 . A compressible collar having a contoured outward-facing surface for mating engagement with the contoured inner surface of the elongate upper member of the combination cable guard and centralizer device of  claim 1 .