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| Number | Title | Issue Date |
| 6142229 | Method and system for producing fluids from low permeability formations A method and system for producing hydrocarbons from a low permeability formation through a well wherein the formation is first fractured with steam. The pressure of the produced fluids is measured at timed intervals and signals representative of these mea... | 11/07/2000 |
| 6116340 | Downhole build-up pressure test using coiled tubing A method and an apparatus for carrying out a downhole shut-in, pressure build-up test of a formation by lowering a string of coiled tubing having a pressure sensor and a packer thereon through the production tubing of the well. The packer is set to isolat... | 09/12/2000 |
| 6092026 | Seismic signal processing and exploration An apparatus and method for the exploration of hydrocarbons by obtaining a set of seismic signal traces distributed over a pre-determined three-dimensional volume of the earth and using a computer to: divide the three-dimensional volume into a plurality o... | 07/18/2000 |
| 6049759 | Method of prestack 3-D migration The present invention relates generally to a method for migrating prestack seismic data that can yield enormous gains in computational efficiency for some classes of seismic velocity models. The method disclosed herein provides an method of rapidly calcul... | 04/11/2000 |
| 5957225 | Drilling assembly and method of drilling for unstable and depleted formations A method and liner assembly for drilling into unstable or depleted formations is provided that maintains control of the wellbore against caving such as where unconsolidated formations are penetrated and/or minimizes fluid losses such as to underpressured ... | 09/28/1999 |
| 5941323 | Steerable directional drilling tool A drilling tool for use with a drill string into which drilling fluid is pumped. The tool comprises: a non-rotating housing having stabilizer blades on its outer surface; a rotating mandrel, passing through the housing; extendible blade means for moving t... | 08/24/1999 |
| 5940778 | Method of seismic attribute generation and seismic exploration The present invention relates generally to the field of seismic exploration and, in more particular, to methods of quantifying and visualizing structural and stratigraphic features in three dimensions through the use of eigenvector and eigenvalue analyses... | 08/17/1999 |
| 5870691 | Spectral decomposition for seismic interpretation The present invention is directed generally toward a method of processing seismic data so as to provide improved quantification and visualization of subtle seismic thin bed tuning effects and other sorts of lateral rock discontinuities. A reflection from ... | 02/09/1999 |
| 5860475 | Mixed well steam drive drainage process A thermal oil recovery process is disclosed for use in a heavy oil reservoir having a plurality of laterally separated, generally vertical wells whose use have left the reservoir characterized by a heated depletion zone, a channel, voidage, or mobility an... | 01/19/1999 |
| 5850622 | Time-frequency processing and analysis of seismic data using very short-time fourier transforms The present invention relates generally to method of seismic data processing which provides a superior method of removing or attenuating some forms of seismic noise and can also be used as a basis for seismic attribute analysis and automatic trace editing... | 12/15/1998 |
| 5838564 | Apparatus for seismic signal processing and exploration An apparatus for the exploration of hydrocarbons by obtaining a set of seismic signal traces distributed over a pre-determined three-dimensional volume of the earth and using a computer to: divide the three-dimensional volume into a plurality of verticall... | 11/17/1998 |
| 5835452 | Reflected shear wave seismic processes A method for measuring and using anisotropy in a coal bed sequence. The method includes the steps of: stripping layers where polarization changes are indicated by applying a static shift to components aligned with the slow shear wave polarization directio... | 11/10/1998 |
| 5803171 | Modified continuous drive drainage process A method of producing hydrocarbons from a subterranean formation. The method includes the steps of: building an array of at least three horizontal wells; establishing injectivity in the formation; establishing communication between adjacent horizontal sec... | 09/08/1998 |
| 5771973 | Single well vapor extraction process A method of producing hydrocarbons from a subterranean formation comprising the steps of: forming a well having a horizontal section located between the midpoint and the bottom of the formation and having a raised end; and continuously injecting a fluid t... | 06/30/1998 |
| 5657294 | Short window norm optimization for multi-source multi-component seismic data A method for processing multi-source multi-component shear wave seismic data. The method comprises the steps of: acquiring four component shear wave seismic data; converting the data into a matrix that is a function of an angles of rotation relative to a ... | 08/12/1997 |
| 5601151 | Drilling tool A hole opener comprising: a cylindrical section of pipe; a nose; a plurality of cutting elements that extend radially from the pipe and that produce a lateral force on the hole opener in response to the rotation of the hole opener in the borehole; lower r... | 02/11/1997 |
| 5563949 | Method of seismic signal processing and exploration A method for the exploration of hydrocarbons, comprising the steps of: obtaining a set of seismic signal traces distributed over a pre-determined three-dimensional volume of the earth; dividing the three-dimensional volume into a plurality of vertically s... | 10/08/1996 |
| 5547031 | Orientation control mechanism In a curve drilling assembly having a mandrel rotatably mounted within a cylindrical sleeve, an apparatus and method of using the apparatus are disclosed for orienting the sleeve of a curve drilling system and for shifting modes of operation of a curve dr... | 08/20/1996 |
