Downhole apparatus
AssigneeWeatherford/Lamb, Inc.
InventorPaul David Metcalfe
Life of this patent
Estimating the term…
Abstract
Apparatus (10) for facilitating coupling and cementing of downhole tubulars (12, 28) comprises a tubing section (12, 10) for use in lining a bore. The tubing section has upper and lower ends and defines a tubing wall having cement outlets (20) spaced from the lower end of the tubing. The lower end of the tubing is selectively closed, and swab cups (22) are provided externally of the lower end of the tubing below the cement outlets (20) for restricting passage of cement.
Claims20
A method of locating and cementing a section of tubing in a drilled bore, comprising:
- providing a tubing section for use in lining a bore;
- running the tubing section into the bore;
- passing cement slurry into the tubing section and directing the slurry into an annulus between the tubing section and the bore wall to substantially fill the annulus while maintaining a lower portion of the annulus substantially clear of cement;
- and
- expanding the lower portion of the tubing section.
A method of locating a tubing section in a drilled bore, comprising:
- running a tubing section into the bore;
- passing cement slurry into the tubing section and directing the slurry into an annulus between the tubing section and the bore wall to substantially fill the annulus while maintaining a lower portion of the annulus substantially clear of cement;
- and
- expanding a lower end portion of the tubing section.
A method of locating and cementing a section of tubing in a drilled bore, comprising:
- running a first tubing section into the bore;
- passing cement slurry into the first tubing section and directing the slurry into an annulus between the first tubing section and the bore wall to substantially fill the annulus while maintaining a lower portion of the annulus substantially clear of cement;
- running a second tubing section into the bore such that a lower portion of the first tubing section and an upper portion of the second tubing section overlap;
- and
- expanding at least the upper portion of the second tubing section to engage and expand the lower portion of the first tubing section.
A method of locating a section of tubing in a drilled bore, comprising:
- running a tubing section into the bore;
- directing cement slurry into an annulus between the tubing section and the bore wall to substantially fill the annulus while restricting cement access to a portion of the annulus around a selected portion of the tubing section;
- and
- expanding the tubing section at the selected portion.
A method of creating a lined bore in an earth formation, comprising:
- running a first tubing section into a drilled bore;
- passing cement slurry into the first tubing section and directing the slurry into an annulus between the first tubing section and the bore wall to substantially fill the annulus, while restricting cement access to a lower portion of the annulus;
- running a second tubing section into the bore such that a lower portion of the first tubing section and an upper portion of the second tubing section overlap;
- and
- expanding at least the upper portion of the second tubing section to engage and expand the lower portion of the first tubing section.
A method of locating and cementing a section of tubing in a drilled bore, comprising:
- providing a tubing section for use in lining a bore;
- running the tubing section into the bore;
- passing cement slurry into the tubing section and directing the slurry into an annulus between the tubing section and the bore wall to substantially fill the annulus while maintaining a lower portion of the annulus substantially clear of cement;
- expanding the lower portion of the tubing section;
- opening cement outlets spaced from a lower end of the tubing section;
- and
- closing the cement outlets by expanding the tubing section.
A method of locating and cementing a section of tubing in a drilled bore, comprising:
- running a first tubing section into the bore;
- passing cement slurry into the first tubing section and directing the slurry into an annulus between the first tubing section and the bore wall to substantially fill the annulus while maintaining a lower portion of the annulus substantially clear of cement;
- expanding the first tubing section;
- running a second tubing section into the bore such that a lower portion of the first tubing section and an upper portion of the second tubing section overlap;
- and
- expanding at least the upper portion of the second tubing section to engage and expand the lower portion of the first tubing section.
A method of locating a section of tubing in a drilled bore, comprising:
- running a tubing section into the bore;
- directing cement slurry into an annulus between the tubing section and the bore wall to substantially fill the annulus while restricting cement access to a portion of the annulus around a selected portion of the tubing section by a sleeve over the selected portion of the tubing section;
- and
- expanding the tubing section at the selected portion.
A method of creating a lined bore in an earth formation, comprising:
- running a first tubing section into a drilled bore;
- passing cement slurry into the first tubing section and directing the slurry into an annulus between the first tubing section and the bore wall to substantially fill the annulus, while restricting cement access to a lower portion of the annulus;
- expanding the first tubing section;
- running a second tubing section into the bore such that a lower portion of the first tubing section and an upper portion of the second tubing section overlap;
- and
- expanding at least the upper portion of the second tubing section to engage and expand the lower portion of the first tubing section.
Dependencies are inferred from the claim text.