Class 166/167 - Bottom receiving and side discharge valves

Subclass of Class 166 - Wells
Definition: Devices in which there is a valve across the bottom of the
No. of patents: 19
Last issue date: 08/01/2006

Number	Title	Issue Date
7083009	Pressure controlled fluid sampling apparatus and method A formation fluid sampling tool including at least one sample tank mounted in a tool collar. The tool collar includes a through bore and is disposed to be operatively coupled with a drill string such that each sample tank may receive a correspondingly preselected fo...	08/01/2006
6745835	Method and apparatus for pressure controlled downhole sampling A method for sampling a subsurface formation includes positioning a formation testing tool in a borehole having borehole fluid with a pressure less than formation pressure such that a pressure differential exists between the borehole and the formation. The method al...	06/08/2004
6705404	Open well plunger-actuated gas lift valve and method of use A system is provided for unloading accumulated liquids and enhancing the recovery of gas from a reservoir having diminished pressure. An annulus between a tubing string and casing is isolated by a packer and continually pressurized with a slipstream of compressed ga...	03/16/2004
6688390	Formation fluid sampling apparatus and method A sample module is provided for use in a downhole tool to obtain fluid from a subsurface formation penetrated by a wellbore. The sample module includes a sample chamber carried by the module for collecting a sample of formation fluid obtained from the for...	02/10/2004
6668924	Reduced contamination sampling A downhole sampling tool and related method are provided. The tool is provided with a main flowline for communicating fluid from the formation through the tool. A main valve is positioned in the main flowline and defines a first portion and a second porti...	12/30/2003
6659177	Reduced contamination sampling A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined...	12/09/2003
6640904	Sand removal and device retrieval tool A simple debris removal apparatus for use in a wellbore. In one aspect of the invention a modular, interchangeable venturi is provided which can be retrofit into an existing debris bailer having a filter and a debris collection container. In another aspec...	11/04/2003
6491828	Method and system to remotely monitor groundwater treatment A contaminated aqueous composition is withdrawn from a groundwater extraction well and the groundwater is treated in a pump and treat system to remove a contaminant. The treating of the aqueous composition is monitored from a location remote from the grou...	12/10/2002
6467544	Sample chamber with dead volume flushing A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined...	10/22/2002
6427776	Sand removal and device retrieval tool The present invention provides a simple debris removal apparatus for use in a wellbore. In one aspect of the invention a modular, interchangeable venturi is provided which can be retrofit into an existing debris bailer having a filter and a debris collect...	08/06/2002
6196319	Hydraulic sand removal tool An apparatus and method for removing sand and other debris from a wellbore. The apparatus is particularly suited for wireline operation, and requires minimal surface equipment. A housing is lowered into the wellbore until the housing is proximate to the s...	03/06/2001
6029743	Compressor-assisted annular flow An apparatus and a method for recovering hydrocarbon from a hydrocarbon producing well is provided. The apparatus comprises a two stage compression-assisted annular flow in which a first compression means is connected to a production tubing to flow gas an...	02/29/2000
6029744	Method and apparatus for retrieving fluid samples during drill stem tests A nipple is provided downhole as part of a tubing (drill string or production) string. The nipple has an interior passage with recesses therein and a seat. A data probe attached to a wireline traverses inside of the tubing from the surface to the nipple. ...	02/29/2000
5482406	Variable spring rate compression element and riser tensioner system using the same A compression element having a deflectable elastomeric member is disclosed. The compression element exhibits a decreasing axial spring rate in response to axial movement and compression of the deflectable member. The compression element may be used alone ...	01/09/1996
5058669	Extraction system with a pump having an elastic rebound inner tube An elastic rebound pump comprises a flexible inner tube having a substantial elastic rebound surrounded by a pump housing. The inner tube defines an inner chamber and the pump housing forms an outer chamber for confining a pump fluid. The pump allows pres...	10/22/1991
4871019	Wellbore fluid sampling apparatus A wellbore fluid sampling apparatus includes an elongated barrel member having a chamber formed by a through flow passage opening from the bottom of the barrel member to a port in the barrel member. Spaced apart ball type valve closure members are connect...	10/03/1989
4766955	Wellbore fluid sampling apparatus A wellbore fluid sampling apparatus includes an elongated tubular housing having a floating piston disposed therein and dividing a bore in the housing into first and second chambers, one of the chambers being in communication with ports in the sidewall of...	08/30/1988
4690216	Formation fluid sampler An apparatus for taking a sample of formation fluid and obtaining temperature and pressure data when the apparatus is lowered into a well casing or pipe string, said apparatus comprising: a sampling device; a gun perforator; two packers, one positioned ab...	09/01/1987
4502537	Annular sample chamber, full bore, APR.RTM. sampler An annulus pressure responsive sampler valve comprising a power section and a sampler section having an annular sample chamber therein; the sampler valve having a full bore therethrough....	03/05/1985

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Class 166/167 - Bottom receiving and side discharge valves