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, the method comprising the steps of:
- providing a tubing section for use in lining a bore;
- running the tubing section into a drilled bore;
- passing cement slurry into the tubing section and directing the slurry into an annulus between the tubing and the bore wall to substantially fill the annulus while maintaining a lower portion of the annulus substantially clear of cement;
- and then
- expanding the lower portion of the tubing section.
A method of locating sections of tubing in a drilled bore, the method comprising the steps of:
- running a tubing section into a drilled 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 then
- expanding a lower end portion of the tubing section.
A method of locating and cementing a section of tubing in a drilled bore, the method comprising the steps of:
- running a first tubing section into a drilled bore;
- passing cement slurry into the tubing section and directing the slurry into an annulus between the tubing 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, the method comprising the steps of:
- running a tubing section into a drilled bore;
- directing cement slurry into an annulus between the tubing 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 then
- expanding the tubing section at said selected portion.
A method of creating a lined bore in an earth formation, the method comprising the steps of:
- drilling a bore;
- running a first tubing section into the bore;
- passing cement slurry into the tubing section and directing the slurry into an annulus between the tubing 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.
Dependencies are inferred from the claim text.