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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7784338 | Low mass sensor for free point tool A free point tool comprises an elongated main shaft assembly and a low mass sensor assembly coaxially and slidingly disposed over the elongated main shaft. The low mass sensor assembly is adapted to be supported within the down hole casing by first and second drag s... | 08/31/2010 |
| 7389183 | Method for determining a stuck point for pipe, and free point logging tool A method and apparatus for determining the location of stuck pipe are provided. In one embodiment, the method includes the step of attaching a free point logging tool to a working line such as a slickline or wireline. The free point logging tool has a freepoint sens... | 06/17/2008 |
| 7302841 | Free point tool with low mass sensor A free point tool comprises an elongated main shaft assembly and a low mass sensor assembly coaxially and slidingly disposed over the elongated main shaft. The low mass sensor assembly is adapted to be supported within the down hole casing by first and second drag s... | 12/04/2007 |
| 7252143 | Method and apparatus for anchoring tool in borehole conduit A free point tool has at least one sensor to measure deformation of a stuck conduit in a borehole. A set of anchors is located adjacent to and on each side of the sensor. The anchors include anchor arms that move from a stowed position to an extended position. Each ... | 08/07/2007 |
| 7024917 | Method and apparatus for an acoustic pulse decay density determination An acoustic transducer is in contact with a near wall that has a much different acoustic impedance than a fluid. The transducer transmits an acoustic pulse into into the wall (such as a plate, a wall of a tube or a wall of a sample chamber) that is in contact with t... | 04/11/2006 |
| 7025089 | System for accurately measuring choke position The system for accurately measuring choke position includes a choke position indicator; a choke adapted to control the flow of high pressure fluids during completion or drilling of a well, wherein the distance between the choke's gate to the choke's seat determines ... | 04/11/2006 |
| 6618675 | Speed correction using cable tension A well logging system is disclosed having an improved speed correction apparatus and method. One embodiment comprises a logging sonde, a wireline cable, a distance sensor, a tension sensor, and a surface computer. The logging sonde moves through a wellbor... | 09/09/2003 |
| 6581453 | Method and apparatus for detecting and localizing unwanted matter internally in a pipe string A method and a device for detecting and localizing unwanted matter, e.g., cement deposits, internally in a drill string. A sleeve-shaped indicator body is dropped down through the drill string while the same occupies an operative position. Then, the indic... | 06/24/2003 |
| 6536519 | Downhole tool to generate tension pulses on a slickline A downhole tool that is connectable to a line to be run downhole with the tool includes a housing, a sensor and a mechanism that is located inside the housing. The mechanism is coupled to the sensor to, in response to the detection of the feature by the s... | 03/25/2003 |
| 6401838 | Method for detecting stuck pipe or poor hole cleaning The present invention provides a method of monitoring a well to detect and provide warning of pipe sticking. The method includes 1) monitoring the downhole annular fluid pressure of a drilling fluid being pumped through the drill string during drilling ov... | 06/11/2002 |
| 6363780 | Method and system for detecting the longitudinal displacement of a drill bit The present invention is a system and method for generating an alarm relative to effective longitudinal behavior of a drill bit fastened to the end of a drill string driven in rotation in a well by a driving device situated at the surface, using a physica... | 04/02/2002 |
| 6145378 | Aided inertial navigation system The invention relates particularly to sensing devices and techniques which may be used to provide measurement data to aid an inertial navigation system, or attitude and heading reference system, and so bound the growth of errors which increase with time i... | 11/14/2000 |
| 6050141 | Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes A method of determining the acoustic impedance of a fluid in a borehole, by gating a reflected acoustic signal into a plurality of time slots, and comparing received energies of the signal for the time slots to obtain a value indicative of the acoustic im... | 04/18/2000 |
| 5984009 | Logging tool retrieval system An apparatus as method for identifying, locating, and retrieving a downhole tool from a borehole. A controller is lowered into the borehole and is capable of detecting a signal from the tool. The signal can be broadcast from the tool, can be generated in ... | 11/16/1999 |
| 5522260 | Method and apparatus for determining a depth correction for a logging tool in a well A method of determining a depth correction for a logging tool that is moved, while suspended from a cable, along a well, the method being of the type in which a measurement of tool depth is performed at the surface at successive instants, the tool compris... | 06/04/1996 |
| 5520245 | Device to determine free point The present invention relates to the free point tool and a sensor for assembly for use in the free point tool. The sensor assembly comprises a first housing having an axis in a transmitter coil mounted thereon as well as at least one receiver coil. The ax... | 05/28/1996 |
| 5508915 | Method to combine statistical and engineering techniques for stuck pipe data analysis The current invention is a method for modeling the probability of a drill string becoming stuck within a given time frame and a method for applying the model to a well being drilled to reduce the probability of sticking. The model is constructed by perfor... | 04/16/1996 |
| 5375476 | Stuck pipe locator system A system for locating a stuck pipe is disclosed which, in one aspect, includes a tool with a removable bi-sensor cartridge assembly which has at least two autonomous independent sensors, one for sensing torsion and one for sensing tension. The sensors may... | 12/27/1994 |
| 5181172 | Method for predicting drillstring sticking A method for predicting drillstring sticking while drilling a borehole includes evaluating the borehole severity for the drillstring at two or more measured bit depths, evaluating the rate of change of borehole severity with bit depth, and predicting the ... | 01/19/1993 |
| 4966234 | Method for determining the free point of a stuck drillstring A method for determining the free point of a stuck drillstring is disclosed. The method includes determining the hookload on the stuck drillstring, comparing the hookload on the stuck drillstring with the most recent hookload prior to drillstring sticking... | 10/30/1990 |
| 4766764 | Magnetic freepoint sensor utilizing spaced hall effect devices A freepoint indicator apparatus and technique are disclosed wherein a fluid tight hollow non-magnetic body member sized and adapted for passage through a well borehole is used. The apparatus houses a marking coil means for applying magnetic marks to the i... | 08/30/1988 |
| 4708204 | System for determining the free point of pipe stuck in a borehole A system for determining the stuck point of pipe in a borehole including a wireline tool having an exciter coil and a receiver coil axially spaced from one another. The exciter coil is driven at a preselected low frequency and the voltage induced into the... | 11/24/1987 |
| 4694902 | Procedure and device for determining the jamming point of a pipe line in a drill hole The procedure of the invention for determining the jamming point of a pipe line in a drill hole is characterized by applying a constant torsional and/or tensile force to the jammed pipe above ground while a device made according to the invention called a ... | 09/22/1987 |
| 4545242 | Method and apparatus for measuring the depth of a tool in a borehole A high resolution method and apparatus for measuring the depth of a tool suspended from a cable inside a borehole are described. The tool includes accelerometers for measuring its acceleration and this measurement is combined with a cable depth measuremen... | 10/08/1985 |
| 4515010 | Stuck point indicating device with linear sensing means A device for determining the stuck point of a drill pipe in a borehole consisting of two relatively movable sections, anchoring means for each section, a sensing means for detecting relative movement of the two sections and producing an inductance represe... | 05/07/1985 |
| 4444050 | Freepoint indicator A system and apparatus for determining the free point location in a well bore upon determinable criteria. The free point tool, is disposed in a stuck point and actuated at a plurality of locations along the length of the string of pipe. At each location, ... | 04/24/1984 |
| 4440019 | Free point indicator The components for operation of the invention are three: (1) a downhole tool consisting basically of a sensitive coil suitably protected by an encasing sheath as it is run downhole inside a string of drill pipe, tubing or the like, (2) surface apparatus t... | 04/03/1984 |
| 4402219 | Apparatus for detecting the stuck point of drill pipes in a borehole The invention relates to apparatus for detecting the stuck point of a conduit, such as drill pipes, in a borehole while eliminating any stress on the detection means during the measurement. A two-part body member is suspended from a cable with the two par... | 09/06/1983 |
| 4351186 | Apparatus for conduit free-point detection in boreholes The apparatus includes a body member lowered within drill pipes and having an upper part (26) and a lower part (27) arranged for limited movements with respect to each other. Each part of the body member is anchored inside the drill pipes and the movement... | 09/28/1982 |
| 4289024 | Well casing free-point indicator Improvement in free point indicators disclosed in U.S. Pat. No. 3,690,163. Discloses new strain sensing system having all electrical/electronic components, other than coil and diode components, located at earth's surface remote from high temperatures and ... | 09/15/1981 |
| 4207765 | Method and apparatus for determining the point at which pipe is stuck in a well A method and apparatus for determining the location at which a string of pipe is stuck in a well bore. The apparatus has two relatively movable sections and an electrical sensing device for determining relative movement of the two sections which produces ... | 06/17/1980 |
| 4125013 | Anchoring apparatus for tools used in determining the stuck point of a conduit in a borehole In the representative embodiment of the new and improved apparatus disclosed herein, a so-called "stuck-point indicator" or "freepoint-indicator" tool includes a deformation-responsive sensor tandemly supported between upper and lower selectively-operated... | 11/14/1978 |
| 4109521 | Method and apparatus for logging inclined earth boreholes using the measured acceleration of the well logging instrument An elongated borehole logging instrument includes a permanent magnet linear reciprocating motor. The motor powers a sliding sleeve which has attached to its outer perimeter a series of reversible vanes. The vanes engage the mud cake or the borehole wall a... | 08/29/1978 |
| 4105070 | Methods for determining the stuck point of a conduit in a borehole In the representative manner of practicing the new and improved method disclosed herein, a so-called "stuck-point indicator" or "freepoint-indicator" tool including a unique deformation-responsive sensor tandemly arranged between unique upper and lower to... | 08/08/1978 |
| 4104911 | Methods and apparatus for determining the stuck point of a conduit in a borehole In the representative embodiment of the new and improved apparatus disclosed herein, a so-called "stuck-point indicator" or "freepoint-indicator" tool includes a deformation-responsive sensor tandemly supported between upper and lower hydraulically-operat... | 08/08/1978 |
| 4105071 | Methods and apparatus for determining the stuck point of a conduit in a borehole In the representative embodiment of the new and improved apparatus disclosed herein, a so-called "stuck-point indicator" or "freepoint-indicator" tool includes a unique deformation-responsive sensor tandemly arranged between upper and lower hydraulically-... | 08/08/1978 |
| 3994163 | Stuck well pipe apparatus A new and improved wire line operated well tool apparatus and method for sensing and testing conditions in a well, such as stuck drill pipe, and for performing certain operations in the well, such as backing off, or loosening, the stuck pipe.... | 11/30/1976 |
| 3942373 | Well tool apparatus and method A new and improved well tool apparatus and method for sensing and testing conditions in a well, such as stuck drill pipe, temperature, metal creep, and the like, and for performing certain operations in the well, such as backing off, or loosening, the stu... | 03/09/1976 |
| 3934466 | Resistance sensing free-point tool An improved free-point measuring system for indicating whether a pipe in a borehole is free or stuck at various locations within the borehole is disclosed. The system employs an improved free-point tool in which is mounted a variable resistor having a wip... | 01/27/1976 |
