Reeves Wireline Technologies Limited Patent applications |
Patent application number | Title | Published |
20150219791 | Method of and Apparatus for Calculating UCS and CCS - A method of calculating the unconfined compressive strength (UCS) of subterranean rock having a borehole formed or being formed therein comprises the steps of:
| 08-06-2015 |
20140365133 | METHODS OF AND APPARATUSES FOR IMPROVING LOG DATA - Disclosed herein is method of computing formation attributes from acoustic measurements in a borehole. The acoustic measurements can be made by operating an acoustic source at multiple frequencies to excite the formation and operating receivers at multiple, longitudinally spaced receiver stations to receive acoustic energy from the formation. The method can include: deriving phase data from the spectrum of received acoustic signals; unwrapping phase information of the phase spectrum data; determining two or more values of difference of phase between acoustic signals at each of a range of frequencies each based on a single generated signal received at two or more pairs of adjacent said receiver stations; generating a value of slope of phase difference values; and in any case of slope ambiguity, unwrapping phase difference information and deriving a dominant slope, at each frequency, from which slowness of the acoustic signal in the formation can be derived. | 12-11-2014 |
20140305660 | Shock Absorber, Related Methods and Apparatuses - A shock absorber ( | 10-16-2014 |
20140292764 | Borehole Log Data Processing Methods - A method of processing borehole log data to create one or more image logs involve modeling the log data as components of an image in the form i(x, y)=l(x, y)×r(x, y) (1), in which i(x, y) is an image representative of the log data, l(x, y) denotes an illumination value of the image at two-dimensional spatial co-ordinates x, y, and r(x, y) denotes a surface reflectance value at the co-ordinates x, y. Equation (1) is transformed to a logarithmic domain, and a Fourier transform is obtained of the resulting logarithmic domain expression to obtain a Fourier domain expression. The Fourier domain expression is high-pass filtered, and an inverse Fourier transform is obtained of the resulting filtered Fourier domain expression. An exponential operation is performed on the result of inverse Fourier transform to obtain a filtered image model expression. Values of the filtered image model expression are mapped to respective color values across the range of the filtered image model expression values. The mapped color values can then be displayed, printed, saved and/or transmitted as one or more image logs. | 10-02-2014 |
20140238660 | Downhole Seal Element and Related Apparatuses - A downhole seal element ( | 08-28-2014 |
20130253835 | LOG INVERSION METHOD FOR NUCLEAR LOG DATA OF EARTH FORMATIONS - Inverting nuclear log data for a geological formation surrounding a borehole involves acquiring nuclear log data for a borehole portion using a moveable nuclear logging tool and acquiring additional log data for the borehole portion using another logging device with superior resolution. Boundaries between adjacent zones are identified that exhibit an attribute of the geological formation to a detectably contrasting degree. From pre-acquired data describing one or more characteristics of the nuclear logging tool, a modelled log of the attributes is generated over the borehole portion, and a zone response is calculated from the pre-acquired data for each zone by using the boundaries to define an initial measure of the depth of each zone and ascribing a value of the attribute in dependence on the depth of each zone. The attribute of each zone is then calculated by deconvolving the nuclear log data using the zone response to minimize the difference between the nuclear log data and the convolution of the zone response and the attribute. | 09-26-2013 |
20120265443 | METHOD OF LOGGING A BOREHOLE AND RELATED APPARATUS - In a method of logging a geological formation, a neutron generator is pulsed to generate a series of neutron bursts that irradiate the formation. Mutually spaced radiation detectors are operated without counting or detecting individual pulses stimulated by a burst from the neutron generator. The detectors are located to detect neutrons that have traversed the formation and to generate respective current outputs indicative of the neutron detection at the respective detectors. The current outputs of the detectors are integrated to generate respective analog waveforms characteristic of the count rates at the detectors. Each of the analog waveforms is converted to digital form, and the respective digital waveforms are compared to establish a ratio of radiation detector count rates corresponding to the outputs of the respective radiation detectors. From the resulting ratio, a compensated measure of the neutron-based porosity of the formation is established. | 10-18-2012 |