Large diameter borehole apparatus
AssigneeWestern Atlas International, Inc.
InventorJacques Maissa
Life of this patent
Estimating the term…
Abstract
Apparatus for positioning a detector at a plurality of depth locations within a large diameter borehole includes an elongated body member having a pair of diametrically opposed hydraulic pad displacement members mounted thereon. A pad mounting member is pivotally attached to each pad displacement member and a pair of borehole wall contacting members are pivotally attached to each pad mounting member. A signal detector is mounted behind one or more of the pad members. At each test depth a hydraulic power system deploys the pad displacement members from the body member to an extended position and extends the wall engaging pad members into contact with the borehole wall.
Claims20
Apparatus for placing a signal detector in a stationary position adjacent the wall of a borehole traversing a subsurface with earth formation, comprising:
- an elongated body member adapted for suspension within a borehole;
- first and second diametrically opposed displacement members cooperatively arranged on said body member;
- first and second pairs of wall engaging pad members, coupled to said first and second displacement member, said pad members being anchored to said borehole wall;
- a signal detector mounted to at least one of said pad members;
- and
- hydraulic power means for deploying said pad members into contact with the wall of said borehole and placing said signal detector in a stationary position adjacent said wall of said borehole.
Apparatus for positioning a signal detector at a location adjacent the wall of a borehole traversing a subsurface earth formation, comprising:
- an elongated body member adapted for suspension within a borehole;
- first and second diametrically opposed displacement members cooperatively arranged on said body member;
- first and second pairs of wall engaging pad members coupled to said first and second displacement members;
- a signal detector mounted to at least one of said pad members;
- hydraulic power means for deploying said pad members into contract with the wall of said borehole;
- a first piston member extending from said first displacement member;
- a second piston member extending from said second displacement member;
- and
- first and second pad carrier members pivotally connected to said first and second piston members, respectively.
Apparatus for placing a signal detector in a substantially stationary position adjacent the wall of a borehole traversing a subsurface with earth formation, comprising
- an elongated body member adapted for suspension within a borehole;
- first and second diametrically opposed displacement members cooperatively arranged on said body member;
- first and second pairs of wall engaging pad members, coupled to said first and second displacement members, said pad members being anchored to said borehole wall;
- a signal detector mounted to at least one of said pad members;
- and
- hydraulic power means for deploying said pad members into contact with the wall of said borehole wherein said hydraulic power means further comprises safety means for retracting said pad members from contact with said wall of said borehole in case of hydraulic failure.
Apparatus for anchoring a seismic detector carrier to the wall of a borehole, comprising:
- an elongated body member adapted to be suspended within a borehole by a cable;
- first and second hydraulic powered, diametrically opposed displacement members cooperatively arranged on said body member;
- first and second piston members extendable from said first and second displacement members, respectively;
- first and second wall engaging pad pairs, coupled to said first and second piston members, to immovably brace said body member against said borehole wall;
- a seismic detector mounted to at least one of said pad members;
- and
- a hydraulic power system coupled to said displacement members.
Dependencies are inferred from the claim text.