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US 4,380,264 AGranted
Survey tool string
AssigneeDrilling Development, Inc.
InventorsWilliam C. Lyons, Scot L. Scurlock
Life of this patent
Estimating the term…
Abstract
A tool for housing a magnetic directional survey instrument for inserting the instrument into a deviated well bore. Means are provided on the tool for circulating well fluids past the tool while it is in the well bore. There is provided means, connectable on the tool, for centering the tool in the vertical, as well as the deviated portion of a well bore.
Claims14
A tool for holding a magnetic directional survey instrument comprising:
- a tubular, non-magnetic housing having a central bore for holding a major portion of said survey instrument;
- closure means for enclosing one end of said tubular housing, said closure means having sealing means coacting with said tubular housing to prevent fluids from entering said tubular housing and having a recess in longitudinal alignment with said bore of said housing and adapted to hold a portion of said survey instrument;
- connector means connected to the other end of said tubular housing for joining said tubular housing to means for lowering said tool into a short radius curve of a deviated well;
- said connector means having a passageway for conducting fluids from the interior of said tool lowering means to the exterior of said tubular housing and having a recess in longitudinal alignment with said bore of said housing and adapted to hold a portion of said survey instrument, and
- said connector means and said tubular housing having means to prevent fluids from entering said tubular housing.
2 more elements
A tool for holding a magnetic directional survey instrument comprising:
- a tubular, non-magnetic housing for holding at least a portion of said survey instrument;
- closure means for enclosing one end of said tubular housing, said closure means having sealing means coacting with said tubular housing to prevent fluids from entering said tubular housing;
- connector means connected to the other end of said tubular housing for joining said tubular housing to means for lowering said tool into a short radius curve of a deviated well,
- said connector means having a passageway for conducting fluids from the interior of said tool lowering means to the exterior of said tubular housing,
- said connector means and said tubular housing having means to prevent fluids from entering said tubular housing,
- a tubular, non-magnetic sleeve adapted to be received on a portion of said tubular housing;
- and
- means for securing said tubular sleeve to said tubular housing.
5 more elements
Dependencies are inferred from the claim text.