Sherry S Zhu

Address:

53 Reed St, Lexington, MA 02421

Phone:

9786923672

VIN:

WBXPC93477WF13008

Make:

BMW

Model:

X3

Year:

2007

US Patent:

20130161006, Jun 27, 2013

Filed:

Dec 27, 2011

Appl. No.:

13/338059

Inventors:

AGATHE ROBISSON - CAMBRIDGE MA, US
FRANCOIS M. AUZERAIS - BOSTON MA, US
ERIK B. NELSON - HOUSTON TX, US
JULIO GUERRERO - CAMBRIDGE MA, US
SUDEEP MAHESHWARI - CAMBRIDGE MA, US
SHERRY S. ZHU - WABAN MA, US

International Classification:

E21B 33/00
E21B 33/13

US Classification:

166285, 166118, 166120

Abstract:

A rubber pocket is described that is suitable for use on tubing, such as a packer-type seal, on casing, such as a cement-type seal, or on liners. The rubber pocket may contain cement particles, rubber particles, swellable particles, cement filled rubber particles, cement filled swellable particles, calcium oxide, magnesium oxide, magnesium sulfate, iron (III) oxide, calcium sulfoaluminate, clay, magnetic particles and/or reactants such as crosslinkers, retardants or epoxy. The particles may be bulk spheres, bulk fibers, hollow spheres, hollow fibers, etc. The rubber pocket or bladder may also be fully or partially filled with fluids such as polymer reactants. The pocket may also be empty or contain a small volume of reactants. The slurry or epoxy or other type of fluid and granular solid or injectable matter can be injected after the completion positioning downhole.

US Patent:

61283703, Oct 3, 2000

Filed:

Aug 6, 1997

Appl. No.:

8/906818

Inventors:

Bahman Barazesh - Marlboro NJ
Sherry Shuihong Zhu - Eatontown NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04M 124
H04M 100

US Classification:

379 31

Abstract:

A multiple tone detector includes n tone detectors, each detecting one of n distinct tones, where n. gtoreq. 2, and a background detector which generates a measure of accumulative background energy E. sub. avg in a frequency band or bands which do not include at least a subset of the n tones. The output of the background detector is applied to a smoothing filter, which generates the accumulative background energy measure E. sub. avg for a current frame as a weighted sum of the background detector output for the current frame and the background energy measure E. sub. avg from a previous frame. A parameter controlling response time of the smoothing filter is varied depending upon whether or not speech is determined to be present in the background portion of the input signal. A processor uses the energy measures from the n tone detectors and the background detector to compute n ratios, where a given ratio is the ratio of the energy measure of the ith tone to the accumulative background energy measure E. sub. avg. The processor determines if each of the n ratios are greater than a threshold, and if the maximum of the n ratios is less than a constant times the minimum of the n ratios, in order to generate a decision as to whether the n tones are present in the input signal.