Patent ID: 6227587
Filing Date: 2001-05-08
Classification: E21B

Abstract:
A combined well casing spider and elevator comprising:(a) a body defining a top and bottom ends and defining a bowl inner wall tapered to reduced diameter from the top end to the bottom end, said body defining a first external guide surface being inclined upwardly and outwardly and defining a second external guide surface being coextensive with said first external guide surface and being inclined upwardly and outwardly to a greater extent as compared with said first external guide surface;(b) a gate member pivotally secured to said body and being movable between an open position permitting lateral movement of a well casing into said bowl and a closed position securing the well casing within said bowl;(c) a circumferential array of casing gripping slips arranged in opposing pairs for vertical and radial mounting in surface contact with said bowl inner wall, said gripping slips forming a circular hole within the center thereof to receive a well casing and vertically movable along the bowl inner wall to effect radial enlargement and contraction of the circular hole formed thereby upward and downward movement respectively to release and grip the casing;(d) a slip actuating mechanism having a cross-rod extending across said body and having end portions rotatably received within journal bushings fixed within said body;(e) crank arms being fixed to said cross-rod and having lift arms connected thereto and being moved thereby, said lift arms being connected with said circumferential array of casing gripping slips for raising and lowering thereof responsive to rotation of said cross-rod and said crank arms; and(f) guide pad means being fixed to said lift arms and having guiding engagement with said first and second external guide surfaces during upward movement of said lift arms and causing first and second segments of upward spreading movement of said lift arms during upward movement thereof to thus cause first and second segments of upward and radially spreading movement of said circumferential array of casing gripping slips.