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Title: Drilling assembly for percussion drilling of deep wells

Abstract

A percussion drill assembly for down hole drilling is described comprising: an elongated chamber defining a barrel assembly; a top sub assembly connected to one end of the barrel assembly and having passage means; a driver sub assembly connected to the other end of the barrel assembly; a hammer assembly disposed within the chamber and having an axially extending flushing passage and fluid intake and fluid exhaust passages; an anvil and bit shank assembly disposed within the chamber and having an axial flushing passage disposed within the driver sub assembly; a fluid distributing means disposed within the barrel assembly to receive an operating fluid for causing reciprocal movement of the hammer assembly; a tube extending through the flushing passage of the distributing means and the hammer assembly for passing a flushing fluid therethrough separate from the operating fluid.

Inventors:
Publication Date:
OSTI Identifier:
5826174
Patent Number(s):
US 4694911
Assignee:
NOV; NOV-87-083356; EDB-88-002453
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 25 Feb 1985
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; PERCUSSIVE DRILLS; DESIGN; HYDRAULICS; OPERATION; CUTTINGS REMOVAL; DRILL BITS; DRILLING FLUIDS; FLUID FLOW; ROCK DRILLING; WELL DRILLING; DRILLING; DRILLING EQUIPMENT; DRILLS; EQUIPMENT; FLUID MECHANICS; FLUIDS; MECHANICS; REMOVAL; 420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)

Citation Formats

Kennedy, J D. Drilling assembly for percussion drilling of deep wells. United States: N. p., 1987. Web.
Kennedy, J D. Drilling assembly for percussion drilling of deep wells. United States.
Kennedy, J D. 1987. "Drilling assembly for percussion drilling of deep wells". United States.
@article{osti_5826174,
title = {Drilling assembly for percussion drilling of deep wells},
author = {Kennedy, J D},
abstractNote = {A percussion drill assembly for down hole drilling is described comprising: an elongated chamber defining a barrel assembly; a top sub assembly connected to one end of the barrel assembly and having passage means; a driver sub assembly connected to the other end of the barrel assembly; a hammer assembly disposed within the chamber and having an axially extending flushing passage and fluid intake and fluid exhaust passages; an anvil and bit shank assembly disposed within the chamber and having an axial flushing passage disposed within the driver sub assembly; a fluid distributing means disposed within the barrel assembly to receive an operating fluid for causing reciprocal movement of the hammer assembly; a tube extending through the flushing passage of the distributing means and the hammer assembly for passing a flushing fluid therethrough separate from the operating fluid.},
doi = {},
url = {https://www.osti.gov/biblio/5826174}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 22 00:00:00 EDT 1987},
month = {Tue Sep 22 00:00:00 EDT 1987}
}