Installation of one-way valve after removal of retrievable drill bit to complete oil and gas wells
OwnerWilliam Vailinventor
Life of this patent
Estimating the term…
Abstract
A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from the casing; pumping down a one-way valve into the casing with a well fluid; and using the one-way valve to cement the casing into the wellbore. Other methods are described to drill and complete wellbores in a geological formation with different types of pipes following the removal of retrievable, or retractable, drill bits from the pipes by using pump-down one-way valves.
Claims3
A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising:
- drilling the well with a drill bit attached to a casing;
- and
- bonding the casing with the wellbore while the drill bit remains attached to the casing.
The method of claim 7, further comprising supplying cement to bond the casing with the wellbore.
A method of drilling, comprising:
- providing a tubular string having a casing portion, the casing portion having a cutting structure connected thereto;
- operating the cutting structure and lowering the tubular string into a wellbore of a desired depth;
- and
- supplying cement through the casing while the cutting structure remains attached to the casing.
Dependencies are inferred from the claim text.