| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073152590 | By measurement of response due to force | 9 |
| 20090044618 | GRAVITATIONAL METHOD AND APPARATUS FOR MEASURING TRUE VERTICAL DEPTH IN A BOREHOLE - A method for measuring true vertical depth in a borehole, the method including: measuring gravitational acceleration in the borehole; and determining the true vertical depth from the measurement. | 02-19-2009 |
| 20110016964 | Device for Registration of Rotational Parameters During Assembly of a Pipe String - Disclosed is a measuring sensor unit for registering one or more rotational parameters of forces that are exerted on a pipe string as it is being rotated into a well by a drilling machine. The measuring sensor unit has a body with a first end portion that is constructed to releasably engage with the end of a drilling machine drive shaft and a second end portion constructed to releasably engage with the end of a pipe string or with a tool that is integrated into a pipe string. Sensors are mounted on the measuring sensor unit and are in wireless communication with a signal transmitter. The sensors register one or more rotational parameters relevant for the rotation of the pipe string. | 01-27-2011 |
| 20110061455 | BOREHOLE FORCE MEASUREMENT - A technique facilitates the measurements of forces, such as forces that result from gravity and acceleration. The system and methodology utilize a plurality of electrodes that cooperate with a movable electrode. By applying appropriate signals to the electrodes, the movable electrode can be levitated in a manner that creates a sensor system able to accurately detect forces resulting from gravity, acceleration and similar causes. | 03-17-2011 |
| 20130186195 | APPARATUS INCLUDING STRAIN GAUGES FOR ESTIMATING DOWNHOLE STRING PARAMETERS - An apparatus for measuring strain on a downhole carrier includes a strain sensitive chassis configured to be fixedly mounted on a surface of the carrier. The chassis configured to be subject to a strain corresponding to a strain on the carrier; and at least one strain gauge including at least one thin film conductor deposited on a surface of the chassis. Also included is a method of manufacturing a sensor for measuring strain on a downhole carrier. | 07-25-2013 |
| 20140013837 | SYSTEMS AND METHODS FOR MEASURING FORCES ACTING ON A DOWNHOLE TOOL - An apparatus for measuring forces acting on a downhole tool is provided. The apparatus can include an annular body having an axial bore formed therethrough. A first fluid can be disposed within the bore. An annular sleeve can be disposed proximate an inner surface of the body. An annular chamber can be formed between the body and the sleeve, and a second fluid can be disposed within the chamber. A sensor can be coupled to the sleeve to measure a strain placed on the sleeve by a pressure differential between the first and second fluids. A pressure of the first fluid in the bore can be determined from the strain. | 01-16-2014 |
| 20140260592 | Identifying Forces in a Well Bore - A member is moved within a well bore in a plurality of cycles, each cycle including holding the member in slips, releasing the slips, moving the member within the well bore and applying the slips. The hook load is measured at multiple points during each of these cycles and the plurality of measured values are used to identify data indicative of the forces on the member within the well bore. | 09-18-2014 |
| 20140366622 | NAVIGATION DEVICE AND METHOD FOR SURVEYING AND DIRECTING A BOREHOLE UNDER DRILLING CONDITIONS - A navigation device for surveying and directing a borehole comprises: a first gyro including a first sensitive axis and a second sensitive axis; a second gyro including at least a third sensitive axis; and a driving unit configured to orient the second gyro in a first mode in a first position in which an earth acceleration dependent error on the second gyro is insignificant and to orient the second gyro in a second mode in a second position in which the third sensitive axis is perpendicular to the first sensitive axis and perpendicular to the second sensitive axis. | 12-18-2014 |
| 20150033842 | In-Situ Scour Testing Device - A field testing device usable to determine the scour-depth potential of soils relied upon to support structural foundations placed in flowing water is disclosed. The device measures the scour potential in-situ, in relative terms, to the scour potential of fine sand using a columnar containment vessel driven into the soil to be tested. Within the columnar containment vessel is a cutting head as an aid in directing a water flow in a generally horizontal direction across the surface of the soil to be tested. Additionally, the cutting head serves to aid in the evacuation of eroded soil from with the containment vessel through an exhaust port. The exhaust port is part of a continuous closed loop water system which provides water for the scour testing and then removes the used water along with eroded soil particulates. | 02-05-2015 |
| 20150143889 | System and Method for Determining a Borehole Azimuth Using Gravity In-Field Referencing - A system and method are provided for determining borehole azimuth. The method comprises receiving a first set of data from a first sensor module, the first sensor module comprising a first plurality of accelerometers; receiving a second set of data from a second sensor module, the second sensor module comprising a second plurality of accelerometers, the second sensor module being positioned further downhole than the first sensor module; determining a first set of gravity components using the first set of data and a second set of gravity components using the second set of data; determining a bend angle and a tilt angle using the first and second sets of gravity components; determining a change in azimuth using the bend and tilt angles; and providing an output indicative of the change in azimuth. The system and method may also use a crustal gravity vector to correct the computed azimuth. | 05-28-2015 |
