Method of and apparatus for positioning retrievable landing nipple in a well bore string
A casing is secured in a well bore in the earth's surface. A liner is secured to the casing and extends downwardly from the casing with an upwardly open receptacle forming part of the liner and facing up in the casing. The liner is provided with a recess and a retrievable landing nipple having recess means therein is secured in the recess in the liner. A production string is arranged in the casing and sealably and slidably engages within the upwardly open receptacle. Retrievable plug means can be moved down through the production string and seated in the landing nipple therebelow to close off flow between the liner and production string for carrying out desired operations in the well bore above the plug without killing the well, or retrievable instrument means can be run through the string and seated in the landing nipple without interfering with flow from the formation. If it is desired to then shut off the formation from the well bore thereabove, retrievable plug means can be seated in the landing nipple above the retrievable instrument means.
- Assignee:
- Texas Iron Works Inc
- Patent Number(s):
- US 4248300
- OSTI ID:
- 6323939
- Country of Publication:
- United States
- Language:
- English
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