초록 ▼

A coiled tubing connector having a body and a plurality of entry or transition sections connected to the body wherein the connector has a low cycle fatigue life of at least 30%, more preferably at least 50% of the coiled tubing. A preferred embodiment contains two shoulders that form an annular void

A coiled tubing connector having a body and a plurality of entry or transition sections connected to the body wherein the connector has a low cycle fatigue life of at least 30%, more preferably at least 50% of the coiled tubing. A preferred embodiment contains two shoulders that form an annular void, a plurality of centralizers about an exterior of the body, and/or a plurality of elastomer molds separating the centralizers. The connector is preferably longer than the connectors of the prior art and is a composite of fluoroplastics or aluminum alloys.

대표청구항 ▼

What is claimed is: 1. A coiled tubing connector comprising: a body comprising at least two shoulders forming an annular void between the shoulders, wherein the at least two shoulders each comprise a fillet; a plurality of entry or transition sections connected to the body; a plurality of centraliz

What is claimed is: 1. A coiled tubing connector comprising: a body comprising at least two shoulders forming an annular void between the shoulders, wherein the at least two shoulders each comprise a fillet; a plurality of entry or transition sections connected to the body; a plurality of centralizers about an exterior of the body, wherein the plurality of centralizers are capable of centering the connector as it passes through a stuffing box; wherein each centralizer comprises a plurality of chamfered edges. 2. The connector of claim 1 wherein the fillet has a variable fillet radii of average value at least ¾ inches. 3. The connector of claim 1 wherein the plurality of centralizers further comprises a composite of fluoroplastics or aluminum alloys. 4. The connector of claim 1 wherein the connector comprises X750 alloy. 5. The coiled tubing connector of claim 1, wherein each entry section comprises a plurality of longitudinal axial slots. 6. The coiled tubing connector of claim 5, wherein the body is back filled and molded with elastomer material. 7. A coiled tubing connector for use in connection with coiled tubing, wherein the connector has a connector cycle fatigue life and the coiled tubing has coiled tubing cycle fatigue life, the connector comprising: a body; a plurality of entry or transition sections connected to the body; and a plurality of centralizers about an exterior of the body, wherein the plurality of centralizers are capable of preventing the body from binding within a stuffing box; wherein the connector cycle fatigue life is at least 30% of the coiled tubing cycle fatigue life; and wherein the body is back filled and molded with elastomer material. 8. The connector of claim 7 wherein each centralizer comprises a plurality of chamfered edges. 9. The connector of claim 8 wherein each centralizer is assembled in a tongue-in-groove assembly and wherein the connector further comprises a plurality of socket head set screws. 10. A connector for use with coiled tubing, wherein the coiled tubing has a coiled tubing outer diameter, the connector comprising: a body wherein the body has a body outer diameter and an exterior; a plurality of centralizers about the exterior; and a plurality of entry sections connected to the body, wherein the entry sections are adapted to be connected to coiled tubing; at least two shoulders of variable radius forming an annular void between the shoulders; wherein the body outer diameter is smaller than the coiled tubing outer diameter; and wherein the centralizers fill the annular void. 11. A coiled tubing connector system, comprising: a first length of coiled tubing and a second length of coiled tubing; and a coiled tubing connector connecting the first length of coiled tubing and the second length of coiled tubing, the coiled tubing connector comprising, a body; a plurality of entry or transition sections connected to the body; a plurality of centralizers about an exterior of the body, wherein the plurality of centralizers are capable of centering the connector as it passes through a stuffing box. 12. The connector system of claim 11 wherein: the first and second lengths of coiled tubing further comprise a coiled tubing outer diameter; and the body further comprises a body outer diameter of less than about three-fourths (¾) times the coiled tubing outer diameter. 13. The connector system of claim 11 wherein: the first and second lengths of coiled tubing further comprise a coiled tubing wall thickness; and the body further comprises a body wall thickness greater than about two (2) times the coiled tubing wall thickness. 14. The connector system of claim 11 wherein: the first and second lengths of coiled tubing further comprise a coiled tubing outer diameter; and the connector further comprises a length greater than about thirteen (13) times the coiled tubing outer diameter. 15. The connector system of claim 11 wherein: the first and second lengths of coiled tubing further comprise a coiled tubing outer diameter; and the body comprises a length of at least about eight (8) times the coiled tubing outer diameter. 16. The connector system of claim 11 wherein: the first and second lengths of coiled tubing further comprise a coiled tubing outer diameter; and each entry section comprises a length of at least about two and one-half (2½) times the coiled tubing outer diameter. 17. The connector system of claim 11 wherein the connector comprises X750 alloy. 18. The coiled tubing connector system of claim 11, wherein the first and second lengths of coiled tubing have a coiled tubing cycle fatigue life and the coiled tubing connector has a connector cycle fatigue life, the connector cycle fatigue life being at least 30% of the coiled tubing cycle fatigue life. 19. The coiled tubing connector system of claim 11, wherein the first and second lengths of coiled tubing have a coiled tubing cycle fatigue life and the coiled tubing connector has a connector cycle fatigue life, the connector cycle fatigue life being at least 30% of the coiled tubing cycle fatigue life, where the connector cycle fatigue life and the coiled tubing cycle fatigue life are determined using a CT Fatigue Testing Fixture, Broken Arrow Model, Serial No. 002, bend fatigue-testing machine. 20. The coiled tubing connector system of claim 11, wherein each entry section comprises a plurality of longitudinal axial slots.