| Patent application number | Description | Published |
|---|
| 20100018306 | METHOD AND DEVICE FOR DETERMINING THE EXISTENCE AND LOCATION OF STRESS-INDUCING FORCES ON A ROD - The present invention relates to methods for determining the existence and location of parasitic stress-inducing forces on a substantially cylindrical rod portion | 01-28-2010 |
| 20100045278 | PROBE FOR ANALYSIS OF A COLLECTION OF RODS OR TUBES - The invention concerns a probe for analysis of a collection of rods or tubes comprising an elongated casing which bears, at a first end, at least one first magnetometer and, at a position sufficiently remote from the magnetometer, a permanent magnet, the north-south axis of which is perpendicular to the axis of the rods. | 02-25-2010 |
| 20100181994 | METHOD AND DEVICE FOR DETERMINING THE LOCATION OF A ROD FIXING POINT - The invention concerns the methods for determining, relative to a point Po, the location of a fixing point Pf of a rod T located in an environment Mi wherein prevails a permanent magnetic field Ch. The inventive method is characterized in that it consists in studying the variations of the magnetic flux which passes through the windows F when the rod is and is not subjected to a torque about its axis A, said windows having substantially the same area and being connected to the rod T respectively in different points Px, Px+1, . . . located on the portion of the rod delimited by the assumed site of the fixing point Pf, and including the point Po, and having each a given position relative to the magnetic field lines of force when the rod is not subjected to the torque. The invention also concerns a device for implementing said method. The invention is advantageously applicable to determining the location of the sticking point of a string of hollow drill rods in an oil well. | 07-22-2010 |
| Patent application number | Description | Published |
|---|
| 20100018306 | METHOD AND DEVICE FOR DETERMINING THE EXISTENCE AND LOCATION OF STRESS-INDUCING FORCES ON A ROD - The present invention relates to methods for determining the existence and location of parasitic stress-inducing forces on a substantially cylindrical rod portion | 01-28-2010 |
| 20100045278 | PROBE FOR ANALYSIS OF A COLLECTION OF RODS OR TUBES - The invention concerns a probe for analysis of a collection of rods or tubes comprising an elongated casing which bears, at a first end, at least one first magnetometer and, at a position sufficiently remote from the magnetometer, a permanent magnet, the north-south axis of which is perpendicular to the axis of the rods. | 02-25-2010 |
| 20100156403 | METHOD AND DEVICE FOR DETERMINING THE LOCATION OF THE STICKING POINT OF A ROD MADE OF MAGNETORESTRICTIVE MATERIAL LOCATED IN A WELL - The present invention relates to methods for determining the location of the sticking point Pc of a hollow rod or pipe | 06-24-2010 |
| 20100181994 | METHOD AND DEVICE FOR DETERMINING THE LOCATION OF A ROD FIXING POINT - The invention concerns the methods for determining, relative to a point Po, the location of a fixing point Pf of a rod T located in an environment Mi wherein prevails a permanent magnetic field Ch. The inventive method is characterized in that it consists in studying the variations of the magnetic flux which passes through the windows F when the rod is and is not subjected to a torque about its axis A, said windows having substantially the same area and being connected to the rod T respectively in different points Px, Px+1, . . . located on the portion of the rod delimited by the assumed site of the fixing point Pf, and including the point Po, and having each a given position relative to the magnetic field lines of force when the rod is not subjected to the torque. The invention also concerns a device for implementing said method. The invention is advantageously applicable to determining the location of the sticking point of a string of hollow drill rods in an oil well. | 07-22-2010 |
