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Class Information
Number: 73/152.56
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > Downhole test > Free point or stuck point
Description: Subject matter wherein the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by measuring or detecting the point or points at which a drill pipe, casing, or tubing is stuck in a borehole traversing an earth formation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7389183 |
Method for determining a stuck point for pipe, and free point logging tool |
Jun. 17, 2008 |
| 7302841 |
Free point tool with low mass sensor |
Dec. 4, 2007 |
| 7252143 |
Method and apparatus for anchoring tool in borehole conduit |
Aug. 7, 2007 |
| 6618675 |
Speed correction using cable tension |
Sep. 9, 2003 |
| 6581453 |
Method and apparatus for detecting and localizing unwanted matter internally in a pipe string |
Jun. 24, 2003 |
| 6536519 |
Downhole tool to generate tension pulses on a slickline |
Mar. 25, 2003 |
| 6401838 |
Method for detecting stuck pipe or poor hole cleaning |
Jun. 11, 2002 |
| 6363780 |
Method and system for detecting the longitudinal displacement of a drill bit |
Apr. 2, 2002 |
| 6145378 |
Aided inertial navigation system |
Nov. 14, 2000 |
| 6050141 |
Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes |
Apr. 18, 2000 |
| 5984009 |
Logging tool retrieval system |
Nov. 16, 1999 |
| 5522260 |
Method and apparatus for determining a depth correction for a logging tool in a well |
Jun. 4, 1996 |
| 5520245 |
Device to determine free point |
May. 28, 1996 |
| 5508915 |
Method to combine statistical and engineering techniques for stuck pipe data analysis |
Apr. 16, 1996 |
| 5375476 |
Stuck pipe locator system |
Dec. 27, 1994 |
| 5181172 |
Method for predicting drillstring sticking |
Jan. 19, 1993 |
| 4966234 |
Method for determining the free point of a stuck drillstring |
Oct. 30, 1990 |
| 4766764 |
Magnetic freepoint sensor utilizing spaced hall effect devices |
Aug. 30, 1988 |
| 4708204 |
System for determining the free point of pipe stuck in a borehole |
Nov. 24, 1987 |
| 4694902 |
Procedure and device for determining the jamming point of a pipe line in a drill hole |
Sep. 22, 1987 |
| 4545242 |
Method and apparatus for measuring the depth of a tool in a borehole |
Oct. 8, 1985 |
| 4515010 |
Stuck point indicating device with linear sensing means |
May. 7, 1985 |
| 4444050 |
Freepoint indicator |
Apr. 24, 1984 |
| 4440019 |
Free point indicator |
Apr. 3, 1984 |
| 4402219 |
Apparatus for detecting the stuck point of drill pipes in a borehole |
Sep. 6, 1983 |
| 4351186 |
Apparatus for conduit free-point detection in boreholes |
Sep. 28, 1982 |
| 4289024 |
Well casing free-point indicator |
Sep. 15, 1981 |
| 4207765 |
Method and apparatus for determining the point at which pipe is stuck in a well |
Jun. 17, 1980 |
| 4125013 |
Anchoring apparatus for tools used in determining the stuck point of a conduit in a borehole |
Nov. 14, 1978 |
| 4109521 |
Method and apparatus for logging inclined earth boreholes using the measured acceleration of the well logging instrument |
Aug. 29, 1978 |
| 4105071 |
Methods and apparatus for determining the stuck point of a conduit in a borehole |
Aug. 8, 1978 |
| 4105070 |
Methods for determining the stuck point of a conduit in a borehole |
Aug. 8, 1978 |
| 4104911 |
Methods and apparatus for determining the stuck point of a conduit in a borehole |
Aug. 8, 1978 |
| 3994163 |
Stuck well pipe apparatus |
Nov. 30, 1976 |
| 3942373 |
Well tool apparatus and method |
Mar. 9, 1976 |
| 3934466 |
Resistance sensing free-point tool |
Jan. 27, 1976 |
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