Well tubing coupling system

Claim 2

A round tubular well flow conductor coupling system comprising: first fluid coupling means having longitudinal flow passages; second fluid coupling means adapted to be releasably coupled with said first fluid coupling means having longitudinal fluid flow passages sized and positioned to communicate with said flow passage means in said first coupling means and being connectible with a flow conductor; a longitudinally extending guide arm having an inside longitudinal guide surface secured on and extending longitudinally beyond the free end of one of said fluid coupling means; and a longitudinally extending outside guide surface shaped to mate with said guide arm guide surface defined along the other of said fluid coupling means aligned parallel with and laterally spaced from said longitudinal flow passages means in said fluid coupling means.

Claim 3

A well flow conductor coupling system in accordance with claim 1 wherein one of said fluid coupling means is provided with a free end edge defining a concave female surface extending peripherally around said fluid coupling means between opposite side edges of the longitudinal guide surface connected on said fluid coupling means and a free end edge on the other of said fluid coupling means defining a convex guide surface extending peripherally around said other of said fluid coupling means around a substantial portion of said coupling means along the opposite side of said coupling means from the longitudinal guide surface on said coupling means.

Claim 4

A well flow conductor coupling system in accordance with claim 2 wherein said guide arm is on said fluid coupling means having said concave female end surface and is of sufficient length to engage said other coupling means prior to engagement of said female and male end mating surfaces on said first and second coupling means.

Claim 5

A well flow conductor coupling system in accordance with claim 3 wherein said guide arm is positioned to engage said male end surface on the other of said coupling means prior to engagement of said guide arm with said longitudinal guide surface on said other of said coupling means.

Claim 6

A well flow conductor coupling system in accordance with claim 3 wherein said guide arm has a longitudinal flat inside orientation surface and said longitudinal orientation surface along said other coupling means is a flat surface.

Claim 7

A well flow conductor coupling system in accordance with claim 4 wherein said guide arm has a flat longitudinal inside orientation surface and said orientation surface on said other coupling means is a flat surface.

Claim 8

A cylindrical well tubing coupling system for removably connecting the lower end of an upper tubing string system with the upper end of a lower tubing string system comprising: an orienting body adapted to be secured on the upper end of a well packer supporting said lower tubing string system, said orienting body having longitudinal flow passages therethrough positioned to communicate with flow passages through said packer leading to said lower tubing string system when said orienting body is secured on said packer, means on said orienting body defining a longitudinal flat orienting surface along an outer side of said orienting body extending along said body from the upper end thereof, and means on the upper end of said orienting body defining a male orienting and guide surface; and an orienting head assembly adapted to be connected at an upper end with the lower end of said upper tubing system, said orienting head assembly comprising an orienting head having means on a lower end edge defining a female orienting and guide surface adapted to mate with said male orienting and guide surface on said orienting body, said orienting head having longitudinal flow passages corresponding with said flow passages in said orienting body and adapted to communicate with said upper tubing string system, a longitudinally extending guide arm secured along an upper end along one side of said orienting head and extending from said orienting head beyond said female surface to engage said male orienting and guide surface on the upper end of said orienting body and said orienting surface along the side of said orienting body, and a seal and latch assembly secured in each of said flow passages of said orienting head and extending from said head along said guide arm for telescopic engagement in said flow passages of said orienting body when said orienting head assembly is coupled with said orienting body.

Claim 9

A cylindrical well tubing coupling system for removably connecting the lower end of an upper tubing string system with the upper end of a lower tubing string system comprising: an orienting body adapted to be secured on the upper end of a well packer supporting said lower tubing string system, said orienting body having longitudinal flow passages therethrough positioned to communicate with flow passages through said packer leading to said lower tubing string system when said orienting body is secured on said packer, means on said orienting body defining a longitudinal flat orienting surface along an outer side of said orienting body extending along said body from the upper end thereof, and means on the upper end of said orienting body defining a male orienting and guide surface; and an orienting head assembly adapted to be connected at an upper end with the lower end of said upper tubing system, said orienting head assembly comprising an orienting head having means on a lower end edge defining a female orienting and guide surface adapted to mate with said male orienting and guide surface on said orienting body, said orienting head having longitudinal flow passages corresponding with said flow passages in said orienting body and adapted to communicate with said upper tubing string system, a longitudinally extending guide arm secured along an upper end along one side of said orienting head and extending from said orienting head beyond said female surface to engage said male orienting and guide surface on the upper end of said orienting body and said orienting surface along the side of said orienting body, and a seal and latch assembly secured in each of said flow passages of said orienting head and extending from said head along said guide arm for telescopic engagement in said flow passages of said orienting body when said orienting head assembly is coupled with said orienting body.

Claim 10

A well tubing coupling system in accordance with claim 7 wherein each of said male and female guide and orienting surfaces on said orienting body and orienting head comprises two helicoid surfaces generated about the longitudinal axis of said head and said body extending from the free end of said head and said body longitudinally along and around said head and said body substantially 180 degrees.

Claim 11

A well tubing coupling system in accordance with claim 8 wherein said guide arm has a tapered lower end portion defined by side edge surfaces converging toward the free end of said arm for engagement with said male guide surfaces on said orienting body to rotate said guide arm into alignment with said flat guide surface along the side of said guide body.

Claim 12

A well tubing coupling system in accordance with claim 9 wherein each of said seal and latch assemblies of said orienting head assembly includes a tubular locking collet, a longitudinal removable latch sleeve within said collet for locking said collet, external annular seal means for sealing around said seal and latch assembly in a bore of said orienting body, and said orienting body has longitudinally spaced seal surfaces for said seal means on said seal and latch assembly and annular locking recess means for said locking collet on said seal and latch assembly.

Claim 13

A well tubing coupling system in accordance with claim 10 wherein said guide arm has a arcuate external surface portion and a flat internal guide surface portion.

Claim 14

A well tubing coupling system in accordance with claim 11 wherein said orienting body has two of said longitudinal flow passages and said orienting head assembly has two of said longitudinal flow passages and one of said seal and latch assemblies connected in each of said two flow passages for forming sealing engagement with said flow passages in said orienting body.