US 4,269,277 A · Power slip assembly

Abstract

Disclosed are apparatus for gripping and manipulating pipe members, including a plurality of slip carriers mounted on an equal number of carrier actuators. The carrier actuators are arranged within a drive sleeve and constrained by radial T-slot connections to a base ring. Sloped T-slot connections link each of the carrier actuators to the drive sleeve. Longitudinal movement of the drive sleeve in one sense propels the carrier actuators and the slip carriers radially inwardly whereby slips mounted on the slip carriers may grip a pipe member positioned within the drive sleeve; longitudinal movement of the drive sleeve in the opposite sense withdraws the carrier actuators and slip carriers from the pipe member. Cooperating wedging surfaces between each of the slip carriers and the corresponding carrier actuator permits the application of holding or moving force on pipe members in either longitudinal sense. The base ring may be rotated by means of a chain drive mechanism to thereby apply torque to pipe members by way of the slips.

Claims32

Dependent claims

Apparatus for manipulating tubular members comprising:

(a) slip carrier means mounted on carrier actuator means arranged generally about a passage and movable generally radially relative thereto;
(b) slip means, for gripping such tubular member, on said slip carrier means whereby movement by said slip carrier means generally radially inwardly relative to said passage may effect gripping engagement between said slip means and said tubular member within said passage;
(c) first surface means as part of said slip carrier means and second surface means as part of said carrier actuator means for cooperating with said first surface means for wedging said slip carrier means and said slip means against said tubular member so engaged by said slip means when longitudinal force is applied to said tubular member by said slip means;
and
(d) drive means linked to said carrier actuator means whereby generally longitudinal movement of said drive means propels said carrier actuator means radially relative to said passage.

2 more elements

Power slip apparatus for manipulating pipe members comprising:

(a) a base;
(b) a drive sleeve generally circumscribing a passage and connected to said base by power means for selectively propelling said drive means longitudinally generally along said passage;
(c) a plurality of slip carriers and an equal number of carrier actuators, each said slip carrier mounted on a corresponding carrier actuator, said carrier actuators arranged about said passage, with said slip carriers generally directed toward said passage, and mounted for radial movement relative to said passage;
(d) slip means, for gripping and imparting force to such pipe member within said passage, on said slip carriers;
(e) sloped linkage means connecting said carrier actuators to said drive sleeve whereby longitudinal movement to said drive sleeve in one sense propels said carrier actuators radially inwardly, and longitudinal movement of said drive sleeve in the opposite sense propels said carrier actuators radially outwardly;
(f) wherein each of said carrier actuators includes first surface means generally facing toward and along said passage in said one sense, and second surface means generally facing toward and along said passage in said opposite sense;
(g) wherein each of said slip carriers includes third surface means generally facing away from and along said passage in said other sense, and fourth surface means generally facing away from and along said passage in said one sense;
and
(h) wherein each of said slip carriers is movable longitudinally relative to said carrier actuators when longitudinally-directed force is applied to said pipe member by said slips engaging said pipe member whereby, when such force is so applied in said one sense, said first and third surface means cooperate to wedge said slip carrier and slips against said pipe member, and when such force is so applied in said other sense, said second and fourth surface means cooperate to wedge said slip carriers and slips against said pipe member.

6 more elements

Dependencies are inferred from the claim text.

Power slip assembly

Life of this patent

Power slip assembly

Life of this patent

Abstract

Claims32