Hydraulic shock absorber
This patent describes an apparatus for absorbing shock vibration along a tool string. It includes an outer casing having thread connector on one end for securing into the tool string, and having a cap means on the other end that defines an axial opening; an inner casing slidably disposed through the axial opening with one end extending coaxially within the outer casing the defining an annular space adjacent thereto, and the other end having a threaded joint connector for securing into the tool string; metering sleeve means disposed around the inner casing and dividing the annular space into first and second cylindrical voids that are in communication through a predetermined metering clearance; first and second compression coil springs slidably disposed on the inner casing and aligned in the respective first and second cylindrical voids; first shoulder means on the inner casing to retain the first coil spring outer end; second shoulder means on the inner casing to retain the second coil spring outer end.
- Assignee:
- Halliburton Co., Duncan, OK (United States)
- Patent Number(s):
- A; US 5083623
- Application Number:
- PPN: US 7-621666
- OSTI ID:
- 5437597
- Country of Publication:
- United States
- Language:
- English
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020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ANNULAR SPACE
CASTING
COMPRESSIBILITY
CONFIGURATION
CYLINDRICAL CONFIGURATION
FABRICATION
FLUID MECHANICS
HYDRAULICS
MACHINE PARTS
MECHANICAL PROPERTIES
MECHANICS
OILS
OPENINGS
ORGANIC COMPOUNDS
ORIFICES
OTHER ORGANIC COMPOUNDS
SHOCK ABSORBERS
SHOCK WAVES
SPACE
SPRINGS
TOOLS
VOIDS