Class 175/234 - With longitudinally spaced valve seats

Subclass of Class 175 - Boring or penetrating the earth
Definition: Apparatus in which at least two surfaces are spaced along
No. of patents: 26
Last issue date: 01/09/2007

Number	Title	Issue Date
7159676	Fluid distributor device for down-hole-drills A fluid distributor device is for a percussive drill assembly including a generally tubular casing (2) having a longitudinal centerline and a piston (6) disposed within the casing so as to define a reservoir chamber (27) in the casing. The distr...	01/09/2007
7155967	Formation testing apparatus and method A method and apparatus for testing formations surrounding an earth borehole. The method includes the following steps: providing a tool movable through the borehole; providing a flow line in the tool; establishing fluid communication between the formations and the fl...	01/02/2007
7139219	Hydraulic impulse generator and frequency sweep mechanism for borehole applications This invention discloses a valve that generates a hydraulic negative pressure pulse and a frequency modulator for the creation of a powerful, broadband swept impulse seismic signal at the drill bit during drilling operations. The signal can be received at monitoring...	11/21/2006
7108080	Method and apparatus for drilling a borehole with a borehole liner A method for drilling a borehole includes; providing a drill string of drill pipe including a center bore, a distal end, a bit assembly at the distal end; hanging a liner from the drill string, thereby forming an annular space between the drill string and the liner ...	09/19/2006
7017682	Drill string shutoff valve A valve assembly connects into a drill string for opening and closing a passage within the drill string. The valve assembly has an inner valve member for opening and closing an inner passage of the drill string. The valve member moves between the open and closed pos...	03/28/2006
7004265	Apparatus and methods for sponge coring A sponge core barrel for use in performing sponge coring and methods of assembling the sponge core barrel, as well as methods of performing sponge coring. The sponge core barrel includes an outer barrel assembly, a core bit secured to a lower end thereof, and an inn...	02/28/2006
6543532	Electrical surface activated downhole circulating sub A preferred novel circulating sub includes an electric motor, hydraulic intensifier, connecting rod, valve sleeve, valve plug, and angled nozzles. Upon activation of the circulating sub the electric motor drives the valve sleeve over the valve plug, causi...	04/08/2003
6349763	Electrical surface activated downhole circulating sub A preferred novel circulating sub includes an electric motor, hydraulic intensifier, connecting rod, valve sleeve, valve plug, and angled nozzles. Upon activation of the circulating sub the electric motor drives the valve sleeve over the valve plug, causi...	02/26/2002
6089335	Positive latch core barrel apparatus The drilling apparatus includes a wire line core barrel inner tube assembly movable to a drill string bit end to have its landing ring seat on the drill string landing shoulder and its latches latchingly retain the assembly adjacent the bit end. The assem...	07/18/2000
6053261	Flow pulsing method and apparatus for the increase of the rate of drilling A simple and economical device is placed in a drill string to provide a pulsating flow of the pressurized drilling fluid to the jets of the drill bit to enhance chip removal and provide a vibrating action in the drill bit itself thereby to provide a more ...	04/25/2000
6029758	Retractable core barrel valving apparatus The drilling apparatus includes a wire line core barrel having a head assembly and a drilling tool connected to the head assembly. The head assembly includes a latch body with a landing shoulder seatable on the drill string landing ring, latches seatable ...	02/29/2000
6019181	Core drilling latch assembly A core drilling latch assembly for use in terrestrial core drilling operations. The latch assembly incorporates features and elements which affect the flow of drilling fluids past the latch assembly and toward the drill bit, depending upon whether the lat...	02/01/2000
5165492	Apparatus for preventing separation of a down-hole motor from a drill string An apparatus is disclosed for use in a drill string 10 to prevent separation of a lower tubular member 16 from an upper tubular member 15 by a rotational force applied from a down-hole motor 22. The down-hole motor 22 is rotated by drilling fluid pumped f...	11/24/1992
5141062	Tool actuator A tool actuator which comprises a casing containing a pipe, which is movable from a locking position to an unlocking position, under the action of a fluid pumped through the casing. When the pipe is in the locking position it locks a mandrel in an activat...	08/25/1992
5095976	Tubing sand pump A sand pump for an oil well includes a tail pipe connected to a barrel. A swab on a mandrel is reciprocatingly operated within the barrel to draw fluid upward from the bottom of the tail pipe. A flap valve at the bottom of the tail pipe and a ball check v...	03/17/1992
5020612	Wire line core drilling apparatus A wire line core barrel inner tube assembly has a latch body with a miximum diameter portion providing a shoulder seatable on a drill string landing ring and a fluid bypass channel extending through the maximum diameter portion and a valving assembly. The...	06/04/1991
4958690	Drilling device with hydraulic percussion generator for earth drilling purposes A drilling device for drilling a borehole and comprising a drilling tool, a drill pipe extending into the borehole for conducting a flow of liquid thereinto for generating an oscillating percussion force applied to the drilling tool, a longitudinally mova...	09/25/1990
4928775	Downhole surge valve for earth boring apparatus A manually operated downhole for an underground earth boring apparatus having a pneumatically operated earth boring tool. A drill pipe is connected to the tool and to a source of pneumatic fluid. A valve is positioned in the drill pipe substantially adjac...	05/29/1990
4924940	Downhole cleanout tool A downhole tool for removing sand from a well bore has an elongated tubular member with four sections. A one-way valve is located between the upper first and second sections. A second one-way valve is located between the third and fourth sections, while a...	05/15/1990
4645006	Annulus access valve system An annulus access valve system having a plurality of valves installed in, and forming a part of, a drill string in a well bore whereby fluid may be pumped into the annulus through the valves individually or in combination as desired. Each valve has a valv...	02/24/1987
4493383	Well clean out tool The present invention relates to a well clean out tool comprising an elongated body having first and second ends and being adapted to be received within a well borehole. The elongated body is comprised of a plurality of subs including a first sub at a low...	01/15/1985
4317490	Apparatus and method for obtaining a core at in situ pressure A method and apparatus are disclosed for obtaining a core at in situ pressure of sedimentary deposits at the bottom of a well bore or body of water. The core barrel has a pressure chamber that is closed and opened by a ball valve actuated from the surface...	03/02/1982
4296823	Cable tool with circulating drill stem A cable tool (10) includes a tool bit (12), a drill stem (14) and an adapter (16). Openings (32) are formed in a cutting face (18) of the tool bit (12) and inclined bores (34) extend upwardly within the tool bit (12) to an upwardly extending bit passagewa...	10/27/1981
4252209	Downhole liquid pressure seismic source and bit positioning system A method of and apparatus for determining the precise position of the drill bit on the bottom of a long drill string in a deep borehole in the earth, during a drilling operation. The method comprises placing a plurality of geophones in a three-dimensional...	02/24/1981
4019592	By-pass tool There is disclosed a tool which is connectible as part of a drill string and which is adapted, upon lifting of the drill string, to permit drilling fluid therein to by-pass a motor in the lower end of the string below the tool....	04/26/1977
3997009	Well drilling apparatus Apparatus is disclosed wherein a tubular body connectible in a drill string and having a float valve arranged therein to normally close the string, as the string is lowered into a well bore, is provided with a plurality of ports connecting its bore above ...	12/14/1976

PatentStorm

Quotables

PatentStorm News

Class 175/234 - With longitudinally spaced valve seats