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| Number | Title | Issue Date |
| 8094513 | Determining positioning of survey equipment using a model To performing positioning of survey equipment, measurements of acoustic signals reflected from at least one boundary of a marine environment are received. The reflected acoustic signals are reflected from the at least one boundary in response to acoustic signaling o... | 01/10/2012 |
| 8085620 | Determining a position of a survey receiver in a body of water To determine a position of a survey receiver used to measure a response of a subterranean structure to a survey signal, positions of the survey receiver as the survey receiver descends in a body of water to a surface are received from an acoustic ranging system. Mea... | 12/27/2011 |
| 8079440 | Determining the polarity of movement of an actuator mass in a seismic vibrator A technique or mechanism for use with a vibrator to be employed for subterranean surveying includes receiving, from a sensor, a unipolar indication of movement of an actuator mass of the vibrator. According to the indication from the sensor, a correlation is determi... | 12/20/2011 |
| 8077541 | Testing a sensor to produce a filter for noise attenuation To test a seismic sensor, an output of the seismic sensor in response to a test signal applied by a signal generator is measured. According to a first function that corresponds to a reference response of the seismic sensor and according to a second function that cor... | 12/13/2011 |
| 7926588 | Optimizing drilling performance using a selected drilling fluid To improve drilling performance, a drilling fluid is selected based on one or more criteria and to have at least one target characteristic. Drilling equipment is used to drill a wellbore, and the selected drilling fluid is provided into the wellbore during drilling ... | 04/19/2011 |
| 7659724 | Surveying method using an arrangement of plural signal sources The survey technique for use in a marine environment to survey a subterranean structure includes providing an arrangement of plural signal sources in a body of water to produce corresponding signals. The signals of the signal sources in the arrangement are set to ca... | 02/09/2010 |
| 7642784 | Electromagnetic survey system with multiple sources Multiple sources are provided for a transmitter cable for use in electromagnetic surveying. The transmitter cable includes a dipole antenna comprising a pair of spaced apart electrodes mounted on their respective cables. Two antennas may be powered from each source.... | 01/05/2010 |
| 7633296 | Receivers and methods for electromagnetic measurements A receiver for electromagnetic measurements includes a polyhedron structure having m faces, where m≧4 and m≠6: n electrodes each disposed on one face of the polyhedron structure, wherein 3≦n≦m; and at least one circuitry connected to the n electrodes for sig... | 12/15/2009 |
| 7599798 | Migrating composite seismic response data to produce a representation of a seismic volume A subterranean structure is characterized using composite seismic response data received from a plurality of sources. Phase encoding is applied to the data in which phase shifts are selected based on frequency variation of noise terms. The phase-encoded data is then... | 10/06/2009 |
| 7555389 | Creating an Absorption Parameter Model To generate an absorption parameter model, estimated values of an effective absorption parameter are received, where the estimated effective absorption parameter values represent absorption encountered by a seismic wave in a subterranean structure. Based on the esti... | 06/30/2009 |
| 7505244 | Micro-switches for downhole use A downhole tool includes a device to be activated by electrical energy and a micro-switch that includes conductors and an element between the first and second conductors selected from the group consisting of: a dielectric element capable of being modulated to provid... | 03/17/2009 |
| 7471089 | Electrode array for marine electric and magnetic field measurements having first and second sets of electrodes connected to respective first and second cables An electrode array for electric and magnetic measurements in a marine environment includes a first set of electrodes connected to a first cable, wherein the first set of electrodes and the first cable are configured to sink to a sea floor in the marine environment; ... | 12/30/2008 |
| 7450467 | Apparatus and methods for seismic streamer positioning Systems and methods for positioning seismic streamers are disclosed that enable two or more streamers to be positioned in over/under configuration. One system comprises first and second pluralities of remotely controllable birds mounted on or inline in first and sec... | 11/11/2008 |
| 7445048 | Plunger lift apparatus that includes one or more sensors A plunger lift apparatus includes wellhead equipment containing a receiver, a conduit extending from the wellhead equipment into a wellbore, and a plunger to be run through the conduit to a downhole location in the wellbore. The plunger includes at least a sensor to... | 11/04/2008 |
| 7430474 | Removing sea surface-related electromagnetic fields in performing an electromagnetic survey To perform surveying of a subterranean structure, electromagnetic (EM) wavefields traveling in opposite directions are determined. A relationship is defined among the EM wavefields, where the EM wavefields include a first set of EM wavefields in a first state in whi... | 09/30/2008 |
| 7411399 | Electromagnetic survey system with multiple sources Multiple sources are provided for a transmitter cable for use in electromagnetic surveying. The transmitter cable includes a dipole antenna comprising a pair of spaced apart electrodes mounted on their respective cables. Two antennas may be powered from each source.... | 08/12/2008 |
| 7383883 | Apparatus and method to detect a signal associated with a component An apparatus for use in a well comprises a structure having at least a first portion formed of a first material, and a detector to detect a signal associated with a component located either within or beyond the structure. The first material has a property that reduc... | 06/10/2008 |
| 7382683 | Computing an absorption parameter for a mode-converted seismic wave To survey a subterranean structure, measured seismic data is processed using an algorithm for deriving a single-mode absorption parameter. A first absorption parameter for a mode-converted seismic wave is computed based on an output of the algorithm. The first absor... | 06/03/2008 |
| 7377321 | Testing, treating, or producing a multi-zone well An assembly having plural valves is run into a wellbore having plural zones, where each of the valves is actuatable by dropping a valve-actuating object into the corresponding valve. The valves are successively actuating, in a predetermined sequence, to an open stat... | 05/27/2008 |
| 7347271 | Wireless communications associated with a wellbore A subsea communication system includes devices in a wellbore and devices on a floor, where the devices in the wellbore and on the floor are able to communicate wirelessly with each other, such as through a formation. ... | 03/25/2008 |
| 7284612 | Controlling transient pressure conditions in a wellbore A method and apparatus for use in a wellbore includes running a tool string to an interval of the wellbore, and activating a first component in the tool string to create a transient underbalance pressure condition in the wellbore interval. Additionally, a second com... | 10/23/2007 |
| 6977367 | Providing a light cell in a wellbore This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for ... | 12/20/2005 |
| 6943340 | Method and apparatus of providing an optical fiber along a power supply line This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for ... | 09/13/2005 |
| 6098716 | Releasable connector assembly for a perforating gun and method An apparatus for releasably coupling a perforating gun to a string includes a tubular member to couple the perforating gun to the string and a latch. The latch connects the perforating gun to the tubular member before detonation of the perforating gun. In... | 08/08/2000 |
