Back to results
US 4,068,865 AGranted
Pipe connectors
AssigneeVetco Offshore, Inc.
InventorForrest E. Shanks, II
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeVetco Offshore, Inc.
InventorForrest E. Shanks, II
Estimating the term…
Pipe connectors particularly useful in securing sections of an underwater marine riser together, including a pin received in a box and bearing against a box shoulder, the pin and box being secured together by coengaging members mounted on the box, and between the pin and box, and forced against a shoulder at the outer portion of the pin over substantially 360.degree. of the shoulder, to correspondingly force the outer end of the pin against the box shoulder, with the contacting pin and box surfaces axially preloaded against each other. The coengaging members can include a plurality of lock dogs mounted in the box and movable radially inwardly against a ring device disposed between the box and pin and engaging the shoulder at the outer portion of the pin, the dogs and pin device having coengaging cam surfaces causing dogs to exert an axial thrust on the ring device which is transmitted from the ring device to the pin shoulder. Bending forces imposed on the connector are transmitted between the box and pin without subjecting the lock dogs to such forces. In another embodiment of the invention, the coengaging members include a ring threaded on the box member and engaging a spacer ring which in turn engages a segmental ring contacting the pin shoulder, rotation of the threaded ring shifting the spacer and segmented rings axially to pre-load the pin and against the box shoulder.
A connector for pipe subjecting the connector to high tensile and bending forces comprising a rigid metallic tubular pin having a first transverse thrust surface at one extremity, a rigid metallic tubular box telescopically disposed over said pin and having a transverse shoulder abutting said first thrust surface, said box and pin having inner and outer wall portions, respectively, spaced laterally from each other to provide an annular space therebetween, lock means on said box shiftable laterally thereof, rigid metallic thrust transmitting means in said annular space, said thrust transmitting means having a second transverse surface engaging a third transverse surface on said pin, first cam means on said thrust transmitting means engaging second cam means on said lock means, and means for shifting said lock means laterally toward said pin to force said second cam means against said first cam means to force said second transverse surface against said third transverse surface and urge said pin axially toward said shoulder to force said first transverse surface against said transverse shoulder to axially pre-load said pin and box for resisting axial separation of said first transverse surface and said shoulder under high tensile forces;
A connector for pipe subjecting the connector to high tensile and bending forces comprising a rigid metallic tubular pin having a first transverse thrust surface at one extremity, a rigid metallic tubular box telescopically disposed over said pin and having a transverse shoulder abutting said first thrust surface, said box and pin having inner and outer wall portions, respectively, spaced laterally from each other to provide an annular space therebetween, rigid thrust means on said box shiftable with respect thereto, rigid metallic thrust transmitting means in said annular space, said thrust transmitting means having a second transverse surface engaging a third transverse surface on said pin, and means for shifting said thrust means relative to said pin to force said thrust transmitting means axially toward said third transverse surface to correspondingly force said second transverse surface against said third transverse surface and urge said pin axially toward said shoulder and thereby force said first transverse surface against said transverse shoulder to axially preload said pin and box for resisting axial separation of said first transverse surface and said shoulder under high tensile forces;
Dependencies are inferred from the claim text.