Shock limiting apparatus
Patent
·
OSTI ID:6796827
In accordance with an illustrative embodiment of the present invention, a shock limiting apparatus for mounting an instrumentality in a drill collar is comprised of a piston and cylinder means subject to hydrostatic well fluid pressure for preventing longitudinal movement of the instrumentality within the drill collar unless a predetermined level of deceleration is exceeded, and a combination of hydraulic damping and Coulomb friction means for dissipating kinetic energy of the instrumentality in a substantially uniform manner when applied deceleration exceeds said predetermined level.
- Assignee:
- Schlumberger Technology Corp
- Patent Number(s):
- US 4223746
- OSTI ID:
- 6796827
- Country of Publication:
- United States
- Language:
- English
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