Class 175/300 - With releasable means to detachably retain telescoping members against axial reciprocation

Subclass of Class 175 - Boring or penetrating the earth
Definition: Apparatus in which means are provided on one of the telescoping
No. of patents: 36
Last issue date: 01/24/2012

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Number	Title	Issue Date
8100200	Chuck assembly for a down-hole drill A chuck assembly, an assembly for an earth-boring drill assembly, and a method of retaining a drill bit for an earth-boring drill assembly, the drill assembly including a casing. The assembly includes a drill bit having a generally cylindrical head, a chuck connecta...	01/24/2012
7325631	Mill and pump-off sub A downhole mill includes a plurality of cutters extending generally radially from a center region to a gage diameter, wherein the plurality of cutters includes a first serrated cutter blade having a plurality of peaks and valleys along its length. The plurality of c...	02/05/2008
7299885	Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring A method and apparatus for allowing a downhole drill string to be stuck at one location and continue to rotate above the stuck section. The apparatus provides a method for collapsing the stuck subassembly by reducing its outside diameter. Simultaneous with the subas...	11/27/2007
7267185	Bit retainer system A bit retainer system comprising a casing, a driver sub adapted to be disposed around a shank of a bit, and a bit retainer. The driver sub comprises a threaded connector, a threaded pin end configured to engage with the hammer case, and a stop. The bit retainer comp...	09/11/2007
7165634	Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des...	01/23/2007
7147068	Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des...	12/12/2006
7052022	Chuck for pneumatic hammer A chuck for a pneumatic hammer including an insert and a pin engaged with the insert and one or more other components of the chuck, such as, for example, the nosepiece. The pin is configured to prevent or otherwise limit rotation of the insert relative to the one or...	05/30/2006
7048050	Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des...	05/23/2006
7036610	Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th...	05/02/2006
6938710	Bit head retaining system and method of installing a bit head in a percussion drill A bit head retaining system includes a bit head having an upper end and a working face, and a retention sleeve adapted to be connected to an end of a drill casing and having an internal opening in which at least a portion of the bit head above the working face is di...	09/06/2005
6827162	Self-retaining downhole-hammer drill bit The present invention relates to a downhole-hammer drill-bit assembly for removable attachment to a substantially tubular casing of a downhole hammer. The drill-bit assembly has a substantially tubular chuck, a drill-bit, and a substantially tubular retainer. The ch...	12/07/2004
6810974	Quick release drill bit for down-hole drills A retainer device (10) is provided for retaining a drill bit (12) within a percussive drill assembly casing (2). The retainer device (10) includes a generally annular body (16) having a central axis and an inner circumferential sho...	11/02/2004
6789632	Rock drilling apparatus A rock drilling apparatus includes a drill string terminating in a drill chuck (32) and a drill bit (16) detachably fitted into the drill chuck, the drill bit having a shank (18) received in the drill chuck, the drill chuck (32) and the d...	09/14/2004
6698537	Bit retention system A bit retainer for a percussion bit assembly has a bore and upper and lower lips extending into the bore. Multiple slots extend from the lower end of the retainer member to a terminal end disposed intermediate the upper and lower ends, forming multiple ca...	03/02/2004
6516903	Drill bit stabilizer device A stabilizing sleeve device for an impact drill bit used in underground drilling operations. The cylindrical tubular device has arcuate keys on a bottom edge for interlocking with keyways in the shoulder of a hammer drill bit and a locking key groove in i...	02/11/2003
6308940	Rotary and longitudinal shock absorber for drilling A rotary and longitudinal shock absorbing apparatus with an mandrel therein is connected to a drill string assembly to absorb abnormal longitudinal shocks and abnormal torsional shocks by cooperating hydraulic and mechanical means, while allowing communic...	10/30/2001
6182776	Overburden drilling apparatus having a down-the-hole hammer separatable from an outer casing/drill bit unit Overburden drilling equipment for drilling a hole includes a down-the-hole hammer formed by a cylinder and a piston reciprocating in the cylinder due to pressurized water being directed alternately to the upper and lower ends of the piston. Each downward ...	02/06/2001
6070678	Bit retention system A substantially tubular retainer member is provided, having a bore of substantially uniform internal diameter which can slip over the retention shoulder of the percussion bit, whether that shoulder is solid or threaded. Pins are then driven through holes ...	06/06/2000
5647447	Bit retention device for a bit and chuck assembly of a down-the-hole percussive drill A bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill, for retaining a head section of a bit should the head section separate from a shank of the bit includes a chuck adapted for threadable connection to a drill casing, ...	07/15/1997
5425430	Jar enhancer There is disclosed a tool for enhancing the impact delivered to an object stuck in a well bore by means of a jar having a first tubular member connected to the object and a second tubular member having a hammer arranged to deliver an upward blow to an anv...	06/20/1995
5318139	Reduced waiting time hydraulic drilling jar A reduce waiting time drilling jar 1 includes a mandrel 2, a housing 3 telescopingly positioned about the mandrel 2, and first and second pistons 89, 111 positioned axially between the mandrel 2 and the housing 3. The pistons 89, 111 are spaced longitudin...	06/07/1994
5086853	Large bore hydraulic drilling jar A double acting hydraulic drilling jar 1 includes a mandrel 2 arranged in a housing 3 for sliding longitudinal movement. A hammer 69 is positioned on the mandrel 2 and interacts with anvil surfaces 64, 66 in the housing 3 to deliver both upward and downwa...	02/11/1992
4903785	Drilling and chiseling tool bit A drilling and chiseling tool bit includes a tool bit head, an axially extending shank and an insertion end for insertion into a drilling or chiseling device. The shank extends between the tool bit head and the insertion end and is divided into individual...	02/27/1990
4846273	Jar mechanism accelerator An energy accumulator for use with a well pipe string to enhance the jarring impact delivered to an object stuck in a well bore by an up and/or down jar mechanism includes inner and outer telescopically connected members relatively movable longitudinally ...	07/11/1989
4694917	Mechanical jarring devices for use in drilling A jarring device for use in drilling comprises first and second members longitudinally relatively movable between a locked position and a released position said device comprising control means including a pair of locking devices each arranged to prevent r...	09/22/1987
4662460	Rotary drilling jar The rotary drilling jar includes inner and outer mandrels releaseably locked against relative longitudinal movement. The inner mandrel is connected to the drilling string and the outer mandrel is connected to the drill bit or other well tools suspended be...	05/05/1987
4607692	Wireline jar An upstroke wireline jar having a hammer 12 at the bottom end of an operating rod 3 which is axially slidable in a casing 2 having an anvil 13 at its upper end. This casing also includes a releasable coupling means which is biased downwards by a spring 5 ...	08/26/1986
4582148	Mechano-hydraulic double-acting drilling jar This invention relates to a double-acting drilling jar characterized by a constantly recharged hydraulic system operating in concert with a mechanical brake to actuate the latter and temporarily inhibit extension of the relatively moving parts utilizing a...	04/15/1986
4558976	Quick fix drill wrench Drill wrench apparatus for use with a drill bit, drilling steel, and a drive source for drilling a hole in the ceiling of a mine is disclosed. The drill wrench (18) includes a first end (50) having a non-circular aperture (58) suitable for receiving a hex...	12/17/1985
4545444	Jar mechanism energizer An energizer for use with a jar mechanism incorporated on inner and outer bodies in a well string to assist the jar mechanism in delivering an upward jar to the well string includes longitudinally spaced seal means between the inner and outer bodies formi...	10/08/1985
4462471	Bidirectional fluid operated vibratory jar Disclosed is a bidirectional fluid operated jarring apparatus. The apparatus includes a tubular body having a lower end defining a downwardly facing body hammer. A tubular knocker sub is axially slidingly mounted to the body adjacent the body hammer and i...	07/31/1984
4401161	Oil well tool retrieving device An oil well tool retrieving device in the form of a jar is provided having a hollow casing including a downwardly facing impact surface, a hammer of cylindrical construction slidably engaging an inner surface of the casing and impacting with the impact su...	08/30/1983
4186807	Optional up-blow, down-blow jar tool An improvement on the tool shown in U.S. Pat. No. 3,853,187, this tool also embodies in a single structure inner and outer telescopically related tubular elements confining a body of operating liquid and comprising a hydraulically retarded up-blow jar, ac...	02/05/1980
4142597	Mechanical detent jars A jar for use in facilitating the removal of stuck objects from wells. The jar has a telescoping assembly held in a collapsed position by a latching means urged into latching position by a resilient means so that the hammer of the jar is spaced from the a...	03/06/1979
4113038	Drilling jar A drilling jar to be installed in a set of drill collars in a drill string is disclosed. In the illustrated embodiment, first and second tubular members telescope relative to one another. At the upper end of the lower tubular member, a set of protruding l...	09/12/1978
4004643	Mechanical drilling jar The specification describes a drilling jar for connection in a rotary drill string. There is a trap space in the jar for collecting the products of wear between its moving parts. The drilling jar includes a generally tubular housing assembly, which has ne...	01/25/1977

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Class 175/300 - With releasable means to detachably retain telescoping members against axial reciprocation