Yang X Xu

US Patent:

6374860, Apr 23, 2002

Filed:

Oct 16, 1998

Appl. No.:

09/174131

Inventors:

Yang Xu - Houston TX
Teresa Lechner-Fish - Katy TX

Assignee:

Daniel Industries, Inc.

International Classification:

E03B 100

US Classification:

137884, 137883, 137885, 73 1902

Abstract:

A gas chromatograph with multiple valves is disclosed. An embodiment of the multi-valve gas chromatograph includes multiple valves, multiple thermal conductivity detectors (TCDs), and a manifold. This allows separation and measurement of a gas sample in one compact integrated unit. The unit is particularly desirable because the solenoids associated with the valves are attached directly to the underneath of the manifold, thus eliminating the need for tubing between the solenoids and the valves. Other features may also be present. For example, a leak free multi-valve block may include a first temperature zone heating the valves and detectors and a second temperature zone heating the columns. The leak free feature may be achieved by placement of tightening screws through the center of each valve. Carrier gas insertion areas may be provided in the multi-valve block to improve performance. Improved separation of the temperature zones leading to further gains in performance can be achieved by use of both a thermal insulator and an air gap.

US Patent:

6601606, Aug 5, 2003

Filed:

Jan 17, 2002

Appl. No.:

10/052120

Inventors:

Yang Xu - Houston TX
Teresa Lechner-Fish - Katy TX

Assignee:

Daniel Industries, Inc. - Houston TX

International Classification:

F16K 3700

US Classification:

137341, 137883, 137884, 73 1902, 392466, 392480

Abstract:

A gas chromatograph with multiple valves is disclosed. An embodiment of the multi-valve gas chromatograph includes multiple valves, multiple thermal conductivity detectors (TCDs), and a manifold. This allows separation and measurement of a gas sample in one compact integrated unit. The unit is particularly desirable because the solenoids associated with the valves are attached directly to the underneath of the manifold, thus eliminating the need for tubing between the solenoids and the valves. Other features may also be present. For example, a leak free multi-valve block may include a first temperature zone heating the valves and detectors and a second temperature zone heating the columns. The leak free feature may be achieved by placement of tightening screws through the center of each valve. Carrier gas insertion areas may be provided in the multi-valve block to improve performance. Improved separation of the temperature zones leading to further gains in performance can be achieved by use of both a thermal insulator and an air gap.

US Patent:

6796380, Sep 28, 2004

Filed:

Aug 19, 2002

Appl. No.:

10/223168

Inventors:

Yang Xu - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 418

US Classification:

166381, 166206, 175 99

Abstract:

An anchor system for high expansion applications is described. It features a gripping member that holds together a pair of links. The movement of the links is regulated to assure the gripping member moves into proper contact with the casing. Meshing gears or a pin and slot can do this, for example. The gripping member is shaped such that it can still transmit load through the links even if the pin connections fail. The gripping member is preferably contoured to the shape of the casing inner wall to enhance grip.

US Patent:

7131461, Nov 7, 2006

Filed:

Mar 30, 2000

Appl. No.:

09/538455

Inventors:

Yang Xu - Houston TX, US
Teresa Lechner-Fish - Houston TX, US

Assignee:

Daniel Industries, Inc. - Houston TX

International Classification:

F15C 1/04

US Classification:

137828, 137341, 137549, 137883, 137884, 25112915

Abstract:

An improved double block and double bleed stream switching system (modifiable to, for example, a double block, single bleed stream switching system) includes a common stream path for a multitude of gas streams from, for example, a process pipeline. The improved stream switching system includes a heating mechanism and insulation oven to help temperature stabilization, along with a structure to separate temperature sensitive solenoids from the heated area. Pre-heat coils are located between the sample switching system and the sample shut off system to warm the gas sample and to act as a flow restrictor. A first embodiment is suited for the Division environment and a second embodiment is suited for Division uses. The improved stream switching system may also feature membrane or cartridge filters located upstream of the sample wetted portion of the stream switching system.

US Patent:

7316274, Jan 8, 2008

Filed:

Feb 28, 2005

Appl. No.:

11/068941

Inventors:

Yang Xu - Houston TX, US
Bennett Richard - Kingwood TX, US
Christian Bayne - The Woodlands TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 33/10
E21B 33/13

US Classification:

166285, 166386, 166387, 166382, 166208, 166212

Abstract:

A method and apparatus for running a liner into a well bore, hanging the liner to a casing, perforating the liner, cementing the liner in, setting a liner packer, and establishing sand control, all in one trip.

US Patent:

7389821, Jun 24, 2008

Filed:

Nov 14, 2006

Appl. No.:

11/598966

Inventors:

Yang Xu - Houston TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 23/08

US Classification:

166381, 166319, 166383

Abstract:

A trigger device for setting a downhole tool includes a retaining member that restricts the downhole tool from setting until it is properly positioned within the well and a force acts upon an actuating member. The retaining member includes an extrudable material that extrudes through an orifice when the force acts upon the actuating member. The extrudable material is preferably one that moves at a known rate so that the amount of time necessary for the downhole tool to set is pre-determined.

US Patent:

7404457, Jul 29, 2008

Filed:

Jun 30, 2006

Appl. No.:

11/480028

Inventors:

Yang Xu - Houston TX, US
Gerald Lynde - Houston TX, US

Assignee:

Baker Huges Incorporated - Houston TX

International Classification:

E21B 12/02

US Classification:

175 57, 175 39

Abstract:

A downhole abrading tool has a body with a first end for connection to a drill string, a cutting end, a drilling fluid passageway, and a fusible material disposed within the body. The fusible material is capable of igniting and combusting in response to a selected temperature increase due to excessive wear on the cutting end. Combustion of the fusible material provides an indication to an operator of the downhole abrading tool of the excessive wear on the cutting end of the downhole abrading tool so that the downhole abrading tool can be removed from the well and replaced. The indication to the operator of the downhole abrading tool can be a temperature change or a pressure change in a drilling fluid flowing through the drilling fluid passageway.

US Patent:

7424910, Sep 16, 2008

Filed:

Jun 30, 2006

Appl. No.:

11/479231

Inventors:

Yang Xu - Houston TX, US
Gerald Lynde - Houston TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 47/00
E21B 12/02

US Classification:

16625001, 175 39

Abstract:

A downhole abrading tool has a body with a first end for connection to a drill string, a cutting end, an exterior surface, a drilling fluid passageway, a valve, and a chamber. Upon exposure of the chamber to a wellbore fluid pressure due to excessive wear on the cutting end, the valve opens. The opening of the valve permits drilling fluid to flow from the drilling fluid passageway, through the exterior surface and into the wellbore. The flow of drilling fluid through the exterior surface causes a pressure drop that is detected at the surface by an operator of the downhole abrading tool. The valve movement may also cause the release of taggants, or indicators, into the drilling fluid that may also be detected by the operator, either visually or with the aid of detection equipment.