Patent ID: 6098708
Filing Date: 2000-08-08
Classification: E21B,F16L

Abstract:
An apparatus for pulling a pipe (12) having a given outer diameter into an earth bore, said apparatus comprising:an approximately conical displacement head (16) having a large diametered rear end connected with a cylindrical tubular shaft (18), said tubular shaft having an outer diameter corresponding to the large diametered rear of the displacement head (16) and said shaft having an internal diameter larger than said given outer diameter of the pipe (12) to be pulled in, andmeans for connecting said shaft to a said pipe (12) to be pulled in,said means for connecting including at least two clips (52) arranged parallel to the axis of said shaft and located at the end of said shaft (18) remote from said displacement head (16) at an angular spacing to one another and fixed to said shaft, each of said clips having a radial bore, a radial outer surface and a headless connecting bolt (60) receivable in said radial bore of said clip and movable between inserted and removed conditions relative to said clip, said connecting bolt (60) when in said inserted condition not extending outwardly beyond said radial outer surface (54) of the clip (52).