Wireline Cased-Hole Standoff

Abstract

The present invention relates to a wireline cased-hole standoff (WCSO) for installation on a wireline cable of a wellbore logging tool. In embodiments, WCSO may be capable of significantly reducing wireline cable drag in a cased-hole section of a well or wellbore as well as reduce logging tensions and improve force transmission from wellbore surface to logging tool cable head during wireline logging operations. In one embodiment, WCSO comprises two cable insert halves, two opposing WCSO body halves (an upper body and a lower body), and two outer shells (an upper low-friction shell and a lower low-friction shell). Such components may be fastened together onto the wireline cable using screws, bolts, dowel pins, spigots, or any combinations thereof.

What is claimed is: 
     
         1 . A wireline cased-hole standoff (WCSO) comprising:
 a pair of cable insert halves, wherein each cable insert half comprises flanged ends disposed on opposing ends of the each cable insert half, and wherein each cable insert half comprises a central flange;   a pair of opposing WCSO body halves; and   a pair of outer low-friction shells configured to reduce friction between the WCSO and a cased-hole, wherein the pair of cable insert halves, the pair of opposing WCSO body halves, and the pair of outer shells are fastened together onto a wireline cable.   
     
     
         2 . The WCSO of  claim 1 , wherein the central flange is disposed about a middle portion of the each cable insert half. 
     
     
         3 . The WCSO of  claim 1 , wherein the flanged ends substantially prevent axial movement of the each cable insert half within the WCSO. 
     
     
         4 . The WCSO of  claim 1 , wherein the central flange substantially prevents axial movement of the each cable insert half within the WCSO. 
     
     
         5 . The WCSO of  claim 1 , wherein the flanged ends and eh central flange in combination substantially prevents axial movement of the each cable insert half within the WCSO.