Systems and methods for cutting coiled tubing strings at a wellsite
AssigneeGrant Prideco, L.P.
InventorSteven Isaacks
Life of this patent
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Abstract
A coiled tubing (CT) cutting system for a surface assembly of a well system includes an upper blow-out preventer (BOP), a lower BOP, a spacer coupled between the upper BOP and the lower BOP, a CT string extending through the upper BOP and the lower BOP and into a wellbore penetrating a subsurface region, and a connector coupled between the spacer and the lower BOP, wherein the connector is configured to connect the upper BOP from the lower BOP.
Claims20
A coiled tubing (CT) cutting system for a surface assembly of a well system, the CT cutting system comprising:
- an upper blow-out preventer (BOP);
- a lower BOP;
- a spacer coupled between the upper BOP and the lower BOP;
- a CT string extending through the upper BOP and the lower BOP and into a wellbore penetrating a subsurface region;
- and
- a connector coupled between the spacer and the lower BOP, wherein the connector is configured to connect the upper BOP from the lower BOP.
A method for cutting a coiled tubing (CT) string of a well system, the method comprising:
- (a) assembling a toolstring onto a CT string;
- (b) running the CT string through a lubricator and into a wellbore penetrating a subsurface region;
- (c) positioning the CT string at a desired depth in the wellbore and closing a lower blow-out preventer (BOP) around the CT string;
- (d) reducing pressure from the lubricator and the CT string;
- and
- (e) activating an upper BOP to sever the CT string, wherein the upper BOP is positioned vertically above the lower BOP along a longitudinal axis of the CT cutting system, and wherein the upper BOP comprises a cutting device.
A method for cutting a coiled tubing (CT) string of a well system, the method comprising:
- (a) detecting a position of a toolstring in a lubricator coupled to a wellbore penetrating a subsurface region, wherein the toolstring is coupled to a CT string;
- (b) lifting the toolstring above an upper blow-out (BOP) coupled to a wellhead of the wellbore;
- (c) closing a lower BOP around the CT string to secure the wellbore;
- (d) reducing pressure from the lubricator and the CT string;
- and
- (e) activating the upper BOP to sever the CT string by a cutting device of the upper BOP, wherein the upper BOP is positioned vertically above the lower BOP along a longitudinal axis of the CT cutting system.
Dependencies are inferred from the claim text.