Reversible air-operated percussive action machine for driving holes in the ground

Patent · Tue Nov 24 04:00:00 EST 1987

OSTI ID:5635193

Shemyakin, E I; Kamensky, V V; Kostylev, A D; Sudnishnikov, B V; Tupitsyn, S K; Tupitsyn, K K; Plavskikh, V D; Chepurnoi, N P

A reversible air-operated percussive action machine for driving holes in the ground is described comprising a cylindrical housing in which there is disposed for reciprocations a hammer defining inside the housing a forward percussive action chamber continuously communicating with an air feeding line and a reverse percussive action chamber communicating alternately through a hole provided in the hammer with the forward percussive action chamber and the atmosphere. The hammer has an air distributor in the form of a guide tube fixedly arranged inside the housing and a valving member spring-loaded relative to the guide tube and capable of opening and closing the hole of the hammer and provided with a lock means for locking the valving member relative to the guide tube in two extreme positions providing for redistribution of air for the machine to operate in the forward and reverse percussive action modes. The air distributor comprises means for defining an accumulating chamber between the valving member and guide tube means for communicating accumulating chamber with the air feeding line and an air restrictor for letting out air from the accumulating chamber when the supply of compressed air to the air feeding line is terminated. The valving member is spring-loaded relative to the guide tube by a spring means arranged so that when compressed air is fed to the accumulating chamber a pressure force acts on the valving member in a direction counter to the action of the spring means. The air restrictor places the accumulating chamber in constant communication with the air feeding line.

• Assignee: Institut Gornogo Dela So An SSSR, Novosibirsk
• Patent Number(s): US 4708211
• OSTI ID: 5635193
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
AIR FLOW
CONTROL EQUIPMENT
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
GAS FLOW
MECHANICS
NATURAL GAS WELLS
OIL WELLS
OPERATION
PERCUSSIVE DRILLS
PNEUMATICS
ROCK DRILLING
VALVES
WELL DRILLING
WELLS