Active Magnetic Ranging
We are the inventors and developers of electromagnetic downhole proximity measurement. Active AC Magnetic ranging has been proven time and time again to be the most accurate technique with the greatest range for locating a well. When used in conjunction with our Passive Magnetic Ranging (PMR) wells can be located at ranges greater than 100 feet with a minimum impact on rig time.
The Vector Magnetics patented active source techniques use an electrode to inject alternating current into the earth. The casing or drillpipe of the target well concentrates the current and generates an electromagnetic field. Sensors in the tool detect the magnitude, direction, and radial gradients of the electromagnetic and magnetostatic fields. A computer on the surface collects these measurements and uses them to compute the distance and direction from hole high side and magnetic North to target.
The Wellspot Radial Gradient Ranging (RGR) service or standard Wellspot service can be run in open hole, through drillpipe, or inside nonmagnetic assemblies to measure distance and direction to a target casing or fish. No access to the target well is required.
Some Case Histories: