Apparatus and method for completing oil and gas wells
First Claim
1. 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;
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 while the drill bit remains attached to the casing.
3 Assignments
0 Petitions
Accused Products
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.
668 Citations
26 Claims
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1. A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising:
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drilling the well with a drill bit attached to a 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 while the drill bit remains attached to the casing.
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2. A method of drilling and completing a wellbore, comprising:
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drilling a wellbore with a drill bit attached to a casing having a one-way valve therein; and using the one-way valve to cement the casing into the wellbore.
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3. A method of drilling, comprising:
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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 locating a downhole tool within the tubular string while the cutting structure remains attached to the casing. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for drilling and casing a wellbore, comprising:
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a tubular string, at least a portion of the tubular string comprising casing; a cutting member connected to the tubular string; and a valve for segregating a first portion of an interior of the tubular string from a second portion of the interior of the tubular string. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following steps:
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drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from the casing, wherein removing the retrievable bit from the casing comprises removing the entire drill bit which was used to drill the well 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.
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25. A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following steps:
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drilling the well with a retrievable drill bit attached to a casing, wherein an extended outer diameter of the retrievable drill bit is at least as large as an outer diameter of the 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.
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26. A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following steps:
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drilling the well with a retrievable drill bit attached to a casing, wherein the retrievable drill bit is attached to a portion of the casing having an inner diameter that is as large as an inner diameter of the entire 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.
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Specification