Hydraulic set tubing hanger
AssigneeVetco Offshore Industries, Inc.
InventorBenton F. Baugh
Life of this patent
Estimating the term…
Abstract
A tubing hanger for suspending multiple strings of tubing in a subsea wellhead or casing hanger upon being lowered from the drill vessel into a properly oriented seating position in the casing hanger. The tubing hanger is releasably secured to the casing hanger by hydraulic manipulation of the running tool after the tubing hanger has been oriented in the casing hanger. Thereafter, by further hydraulic manipulation, the running tool is released from the hydraulic set tubing hanger for retrieval to the drill ship. The running tool may later be returned and connected to the tubing hanger and, by further manipulation of the running tool, the hanger is disconnected from the casing hanger and elevated to the drill ship.
Claims11
A tubing hanger comprising:
- an inner body having a tubing string passage therethrough for connecting a tubing string;
- releasable lock means for locking said tubing hanger to a running tool including a shear dog having a shear pin and teeth for engagement by an actuator sleeve surrounding said tubing hanger body to shear said shear pin when said actuator body is moved longitudinally relative to said tubing hanger body.
A tubing hanger having an inner body adapted to be seated in a casing hanger and having a tubing string passage extending longitudinally therethrough for connecting a tubing string thereto and a longitudinally extending control line passage extending longitudinally therethrough and not in fluid connection with said tubing string for connecting a hydraulic control line for actuating downhole devices independently of said tubing string.
A running tool for setting and retrieving a tubing hanger in a casing comprising:
- an inner body having a longitudinally extending passage therethrough for connecting a tubing string;
- latch dogs carried on said inner body and adapted to be moved radially outwardly for latching to a surrounding groove in a tubing hanger for locking the running tool thereto;
- first cylindrical piston means carried on said inner body and movable longitudinally relative thereto for engaging said latch dogs and moving them radially outwardly;
- and
- hydraulic fluid control passage in said inner body not in fluid communication with said tubing string for supplying hydraulic fluid under pressure to said first cylindrical piston means by moving it longitudinally relative to said inner body.
A running tool for setting and retrieving a tubing hanger, comprising:
- a. an inner body having a longitudinally extending passage therethrough for connecting with a tubing string;
- b. an outer sleeve surrounding said inner body and connected thereto;
- c. latch means carried by said inner body for latching to a tubing hanger;
- d. hydraulic actuated means in said inner body for releasing said latch means to release the tubing hanger from said running tool;
- and
- e. a re-entry control line extension connected to the control line passage in said inner body and adapted to be inserted into a control line or receptacle in the tubing hanger to provide hydraulic fluid to a valve connected to said control line when the running tool is re-connected to the tubing hanger.
Dependencies are inferred from the claim text.