Resistivity antenna shield, wear band and stabilizer assembly for measuring-while-drilling tool
AssigneeSchlumbreger Technology Corporation
InventorKeith A. Moriarty
Life of this patent
Estimating the term…
Abstract
A sensor protection system for use with an MWD tool includes a tubular body having lesser and greater diameter portions, antennas mounted in grooves in the lesser diameter portion, shield sleeves covering the antennas and being locked in place against longitudinal and rotational movement, and a wear band on the greater diameter portion to provide a standoff for the shield sleeve, the wear band also being locked against movement in the longitudinal and rotational directions. The locking mechanism also can be used to fix a sleeve-type stabilizer on the tubular body.
Claims15
A locking assembly for mounting a sleeve on a tubular body, comprising:
- arcuate recess means in said body;
- ring segment means mounted in said recess means;
- and co-engaged means on said ring segment means and said sleeve for locking said sleeve against longitudinal and rotational movement on said body.
A protection assembly for a sensor on a tubular body, comprising:
- an external annular groove in said body having an antenna mounted therein;
- a shield sleeve mounted on said body for protecting said antenna;
- first locking means including first segmented ring members cooperable with said shield sleeve for preventing longitudinal and rotational movement thereof;
- wear band means mounted on said body adjacent said shield sleeve and adapted to prevent engagement of said shield sleeve with a wellbore wall;
- and second locking means including second segmented ring members engageable with said wear band means for preventing longitudinal and rotational movement thereof.
Dependencies are inferred from the claim text.