Coiled tubing hanger assembly
First Claim
1. A coiled tubing anchor assembly for supporting tubing in a well, comprising a tubing head having an internal bore for receiving the tubing and a tapered throat provided in said bore;
- a plurality of slips provided in said bore, said slips having tapered surfaces sidably engaging said tapered throat and slip teeth provided on said slips, said slip teeth facing inwardly of said bore adjacent the tubing;
a rack element slidably disposed in said bore beneath said slips and rack projections provided on said rack element;
a gear disposed for rotation in said tubing head and gear teeth provided on said gear for engaging said rack projections on said rack element; and
a rotatable slip-operating mechanism extending into said tubing head and engaging said gear, wherein said rack element and said slips are slidably displaced in said bore and said tapered throat, respectively, and said slip teeth selectively engage and disengage the tubing responsive to rotation of said slip-operating mechanism and said gear.
2 Assignments
0 Petitions
Accused Products
Abstract
A coiled tubing hanger assembly for supporting coiled tubing in a well including, as a first element, a mechanically-assisted slip assembly characterized by multiple slip segments inserted in a tapered slip bowl located in the midsection of a coiled tubing head. The conical slips are constrained to move in concert in the tapered throat of the tubing head midsection by means of a slip retainer ring and rest on a rack cylinder slidably positioned in the bore of the midsection beneath the slips. The rack cylinder is typically fitted with lands and grooves that engage a pinion gear attached to a slip-operating mechanism to facilitate manually raising and lowering the rack cylinder and the slips together, causing the slip teeth to selectively engage and disengage the segment of coiled tubing extending through the slips and the bore of the rack cylinder, into the well. A pack-off assembly is located in the bore of a lower body secured to the midsection of the tubing head for sealing the coiled tubing against well pressure and pack-off screws are radially seated in the lower body to apply pressure to the pack-off assembly for achieving this purpose. A top bonnet is bolted to the top of the midsection and seats a slip cone shaped to engage the top inside surfaces of the slips to maintain the slips in the proper configuration in the midsection.
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Citations
22 Claims
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1. A coiled tubing anchor assembly for supporting tubing in a well, comprising a tubing head having an internal bore for receiving the tubing and a tapered throat provided in said bore;
- a plurality of slips provided in said bore, said slips having tapered surfaces sidably engaging said tapered throat and slip teeth provided on said slips, said slip teeth facing inwardly of said bore adjacent the tubing;
a rack element slidably disposed in said bore beneath said slips and rack projections provided on said rack element;
a gear disposed for rotation in said tubing head and gear teeth provided on said gear for engaging said rack projections on said rack element; and
a rotatable slip-operating mechanism extending into said tubing head and engaging said gear, wherein said rack element and said slips are slidably displaced in said bore and said tapered throat, respectively, and said slip teeth selectively engage and disengage the tubing responsive to rotation of said slip-operating mechanism and said gear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a plurality of slips provided in said bore, said slips having tapered surfaces sidably engaging said tapered throat and slip teeth provided on said slips, said slip teeth facing inwardly of said bore adjacent the tubing;
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15. A coiled tubing anchor assembly for supporting tubing in a well, comprising a tubing head having an internal bore for receiving the tubing and a tapered throat provided in said bore;
- a tapered slip cone provided in said bore;
a plurality of slips provided in said bore beneath said slip cone, said slips having tapered outer surfaces slidably engaging said tapered throat and tapered inner surfaces slidably engaging said slip cone and slip teeth provided on said slips, said slip teeth facing inwardly of said bore adjacent the tubing;
a rack element sidably disposed in said bore beneath said slips and rack projections provided on said rack element;
a gear disposed for rotation in said tubing head and gear teeth provided on said gear for engaging said rack projections on said rack element; and
a rotatable slip-operating mechanism extending into said tubing head and engaging said gear, wherein said rack element and said slips are slidably displaced in said bore and said tapered throat, respectively, and said slip teeth selectively engage and disengage the tubing responsive to rotation of said slip-operating mechanism and said gear. - View Dependent Claims (16, 17, 18, 19)
- a tapered slip cone provided in said bore;
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20. A coiled tubing anchor assembly for supporting tubing in a well, comprising a tubing head having an internal bore for receiving the tubing and a tapered throat provided in said bore;
- a slip cone provided in said bore, said slip cone having a flange and a tapered base extending from said flange;
a plurality of slips provided in said bore, said slips having tapered outer surfaces sidably engaging said tapered throat and tapered inner surfaces sidably engaging said tapered base of said slip cone and slip teeth provided on said slips, said slip teeth facing inwardly of said bore adjacent the tubing;
a rack cylinder sidably disposed in said bore beneath said slips and lands and grooves provided on said rack cylinder;
a gear disposed for rotation in said tubing head and gear teeth provided on said gear for engaging said lands and grooves on said rack cylinder; and
a rotatable slip-operating mechanism extending into said tubing head and engaging said gear, wherein said rack cylinder and said slips are sidably displaced in said bore and said tapered throat, respectively, and said slip teeth selectively engage and disengage the tubing responsive to rotation of said slip-operating mechanism and said gear. - View Dependent Claims (21, 22)
- a slip cone provided in said bore, said slip cone having a flange and a tapered base extending from said flange;
Specification