公开(公告)号：GB2332460B

公开(公告)日：2002-06-12

申请号：GB9827001

申请日：1998-12-08

Applicant: WESTERN ATLAS INT INC

Inventor： REINHARDT PAUL A

IPC: E21B7/08 ,  E21B17/10 ,  E21B23/00 ,  E21B36/04 ,  E21B47/00

Abstract: An apparatus for orienting a downhole tool relative to a borehole. The invention comprises a phase change material such as a shape memory metal engaged with the tool in an initial position which is activatable to move into an operating position relative to the tool. An actuator activates the phase change material to orient the tool relative to the borehole. The member is engaged with said housing and with the phase change material for selective movement relative to said housing between an initial position and an operating position. The actuator activates said phase change material to move said member. A return spring can move the phase change material to or from the initial position. The invention can be combined with a logging tool or other downhole device to orient the tool within a borehole. In different applications, the invention can center the tool or urge the tool against one side of the borehole wall.

公开(公告)号：CA2230902C

公开(公告)日：2002-04-23

申请号：CA2230902

申请日：1998-02-26

Applicant: WESTERN ATLAS INT INC

Inventor： REIDERMAN ARCADY ,  TAICHER GERSH ZVI

IPC: G01V3/32 ,  G01R33/44 ,  G01N24/08

Abstract: CA 02230902 1998-02-26 A nuclear magnetic resonance sensing apparatus, including a magnet for induc ing a static magnetic field within materials to be analyzed. The magnetic field is 5 substantially coaxial with a longitudinal axis of the apparatus. The magne tic field is polarized substantially perpendicularly to the longitudinal axis and is symm etric about the axis. The static magnetic field has a maximum longitudinal gradient whic h isinversely related to a speed of motion of the appara tus along the longitudinal axis through the materials to be analyzed. The apparatus includes a transmitter f or generating 10 a radio frequency magnetic field in the materials for exciting nuclei in the materials. The radio frequency magnetic field is substantially orthogonal to the static mag netic field. The apparatus includes a receiver for detecting nuclear magnetic resonance s ignals from the excited nuclei in the materials. In a preferred embodiment, the magnet c omprise magnetized cylinders stacked along the longitudinal axis. The magnetization of each of 15 cylinder is proportional to its distance from a center plane of the magne t. The cylinders are magnetized parallel to the longitudinal axis and towards the center plan e. The preferred embodiment of the magnet includes an end magnet disposed at each longitudinal end of the stacked cylinders. The end magnets are each magnetiz ed parallel to the longitudinal axis and in a direction opposite to the magnetization of an adjacent 20 one of the cylinders.

公开(公告)号：GB2367900A

公开(公告)日：2002-04-17

申请号：GB0130977

申请日：1998-09-01

Applicant: WESTERN ATLAS INT INC

Inventor： TAICHER GERSH ZVI ,  REIDERMAN ARCADY

IPC: G01R33/561 ,  G01V3/32 ,  G01N24/08 ,  G01R33/44

Abstract: A method for measuring nuclear magnetic resonance of a medium includes magnetically polarizing nuclei in the medium with a static magnetic field, acquiring a first CPMG echo train from a first sensitive volume having a duration large enough to determine the presence of slowly relaxing components in the medium, and acquiring a plurality of additional CPMG echo trains, each of the additional trains corresponding to a different sensitive volume, each of the additional CPMG echo trains having a shorter duration and echo spacing than the duration and echo spacing of the first CPMG echo train.

公开(公告)号：GB2329487B

公开(公告)日：2002-02-20

申请号：GB9816970

申请日：1998-08-04

Applicant: WESTERN ATLAS INT INC

Inventor： HA STEPHEN T ,  LOPEZ JOSEPHINE ,  WALKOW ARNOLD M ,  RAFIE SAEED ,  HUNZIKER JAMES C

IPC: G02B6/44 ,  H01B7/04 ,  H01B11/22

公开(公告)号：GB2333840B

公开(公告)日：2002-02-13

申请号：GB9901815

申请日：1999-01-27

Applicant: WESTERN ATLAS INT INC

Inventor： BEASLEY CRAIG J ,  CHAMBERS RONALD EDWARD

IPC: G01V1/00 ,  G01V1/02 ,  G01V1/38 ,  G01V1/36

Abstract: A method for acquiring and processing seismic survey data from two or more seismic sources activated simultaneously or nearly simultaneously or for a single source moved to and fired at different locations. In one aspect such a method includes acquiring seismic survey trace data generated by the source or sources, attaching source geometry to the traces, soring the traces according to a common feature thereof, (e.g. to CMP order), interpolating data points for discontinuities on the traces, selecting two halves or two portions slightly more than half of the traces, filtering the trace data for each of the two portions to filter out data related to a second one of the two seismic sources, reducing the filtered trace data to two halves of the data and deleting interpolated data, and then merging the two halves to produce refined useful seismic data related to a first one of the seismic sources. In one aspect the method includes re-processing the data and filtering out the trace data for the second seismic source to produce refined useful seismic data related to the second seismic source. In one aspect the sources are fired temporally close together and, in one particular aspect, they are fired substantially simultaneously.

公开(公告)号：GB2324872B

公开(公告)日：2002-01-09

申请号：GB9807254

申请日：1998-04-03

Applicant: WESTERN ATLAS INT INC

Inventor： TAICHER GERSH ZVI ,  REIDERMAN ARCADY

IPC: G01V3/32 ,  G01R33/383 ,  G01R33/44

公开(公告)号：GB2330413B

公开(公告)日：2001-10-03

申请号：GB9822433

申请日：1998-10-14

Applicant: WESTERN ATLAS INT INC

Inventor： ARONSTAM PETER S

IPC: E21B47/00 ,  G01V1/42 ,  G01V3/30

Abstract: Long-term changes in the distribution of a mineral in a subsurface deposit, due to commercial production of the mineral, are monitored by suitable instrumentation. The monitoring instrumentation is installed in combination with commercial mineral production equipment but the monitoring instrumentation is transparent to production. The monitoring instrumentation measures long-term changes in selected petrophysical attributes that are due to re-distribution of the mineral within the deposit in response to production.

公开(公告)号：NO310845B1

公开(公告)日：2001-09-03

申请号：NO960138

申请日：1996-01-12

Applicant: WESTERN ATLAS INT INC

Inventor： FANINI OTTO N ,  FABRIS ANTONIO

IPC: G01V3/24 ,  G01V3/20

Abstract: An apparatus for measuring resistivity of an earth formation. The apparatus includes at least one source of measuring current. The source includes a delta-sigma modulator and a serial bit source coupled to the modulator. The serial bit source represents the magnitude of the measuring current at spaced apart time intervals. The apparatus includes a sensor responsive to formation current resulting from interaction of the measure current with the earth formation. The sensor is coupled to a sigma-delta modulator. The modulator is coupled to a digital mixer and a digital filter. The output of the digital filter corresponds to the magnitude of the measure current detected by the sensor sampled at spaced apart time intervals. In a preferred embodiment, the apparatus includes a plurality of current sources each having a different frequency. The sigma-delta modulator is coupled to a plurality of mixers each for demodulating one of the different source frequencies.

公开(公告)号：NO20013033L

公开(公告)日：2001-07-23

申请号：NO20013033

申请日：2001-06-19

Applicant: WESTERN ATLAS INT INC

Inventor： AMBS LORAN

IPC: B06B1/06 ,  G01V1/02

Abstract: A marine seismic source for generating acoustic source energy from electrical power. A slotted housing has an exterior surface engaged with an electrically activated transducer such as a piezoelectric transducer. One or more piezoelectric components can be adhered or otherwise attached to the exterior surface of the housing. A case can cover all or part of the piezoelectric components, and the case can be waterproof to prevent contact between the transducer and the water. The case can be integrated with the slotted housing to form a composite structure, or a cavity, for containing a transducer such as piezoelectric components.

公开(公告)号：NO20013033D0

公开(公告)日：2001-06-19

申请号：NO20013033

申请日：2001-06-19

Applicant: WESTERN ATLAS INT INC

Inventor： AMBS LORAN

IPC: B06B1/06 ,  B06B

Abstract: A marine seismic source for generating acoustic source energy from electrical power. A slotted housing has an exterior surface engaged with an electrically activated transducer such as a piezoelectric transducer. One or more piezoelectric components can be adhered or otherwise attached to the exterior surface of the housing. A case can cover all or part of the piezoelectric components, and the case can be waterproof to prevent contact between the transducer and the water. The case can be integrated with the slotted housing to form a composite structure, or a cavity, for containing a transducer such as piezoelectric components.