Chih Lung Chen

US Patent:

7222697, May 29, 2007

Filed:

Mar 10, 2005

Appl. No.:

11/075732

Inventors:

Chih Chen - Grand Prairie TX, US

International Classification:

B66B 11/08

US Classification:

187263, 187261, 187251, 182144, 182148, 182150, 254266, 254375

Abstract:

An elevator is described, comprising a first series connected pulley set installed in a fixing frame, a carriage located below the first series connected pulley set, a second series connected pulley set installed on the top of the carriage, a rotary wheel installed in the carriage and a steel rope. The steel rope connects the first series connected pulley set, the second series connected pulley set and the rotary wheel, so that the gravity load of one pulley set can belowered to decrease the pulling force of the steel rope to enhance the safety of the elevator.

US Patent:

57032866, Dec 30, 1997

Filed:

Oct 20, 1995

Appl. No.:

8/546251

Inventors:

Mark A. Proett - Missouri City TX
Wilson C. Chin - Houston TX
Chih C. Chen - Plano TX

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 4900

US Classification:

7315205

Abstract:

A new technique for interpreting pressure data measured during a formation test. The new technique uses an exact spherical flow model that considers the effects of flow line storage and that can be solved in closed, analytical form. This technique generates a type-curve that matches the entire measured pressure plot and that can accurately predict ultimate formation pressure during formation testing from a pressure plot that has not achieved steady state values near the formation pressure.