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US 7,849,927 B2Granted
Running bore-lining tubulars
AssigneeDeep Casing Tools, Ltd.
InventorDerek F. Herrera
Life of this patent
Estimating the term…
Abstract
A method of running a tubular string into a wellbore comprises running a bore-lining tubular string into a wellbore substantially without rotation, while rotating a cutting structure at a distal leading end of the tubular string. Other methods provide for rotation of the string and the provision of a non-rotating stabiliser towards the leading end of the string.
Claims14
An apparatus (3) for use in running a bore-lining tubular string into a bore, comprising:
- a cutting structure (5);
- a drive unit (4) coupled to the cutting structure (5) and operable to rotationally drive the cutting structure (5), wherein the drive unit and cutting structure comprise at least one of a frangible, drillable, soluble, and degradable portion, wherein the drive unit is completely removable from the bore by the action of drilling, dissolving or degrading;
- and
- an end connector (13) coupled to the drive unit (4) and adapted for connection to the bore-lining tubular.
1 more element
A downhole apparatus, comprising:
- a bore-lining tubular string;
- a cutting structure;
- a drive unit coupled to the cutting structure and operable to rotationally drive the cutting structure, wherein the drive unit and cutting structure comprises a frangible, readily-drillable, soluble, or degradable portion, wherein the drive unit is completely removable from the tubular string by action of drilling, dissolving or degrading;
- and
- an end connector for coupling the drive unit to an end of the bore-lining tubular string.
2 more elements
A method of running a bore-lining tubular string into a bore, comprising:
- attaching an apparatus to a leading edge of the bore-lining tubular string, the apparatus comprising a cutting structure and a drive unit coupled to the cutting structure and operable to rotationally drive the cutting structure, wherein the drive unit and cutting structure comprises a frangible, readily-drillable, malleable, soluble, or degradable portion;
- running the bore-lining tubular string with the attached apparatus into the bore;
- and
- drilling out the apparatus.
1 more element
Dependencies are inferred from the claim text.