We are the inventors and developers of the electromagnetic downhole proximity measurement. 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 elctromagnetic and magnetostatic fields. A microcomputer 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 new Wellspot Radial Gradient Ranging (RGR) service or standard Wellspot service can be run in open hole, through drillpipe, or inside non-magnetic assemblies to measure distance and direction to a target casing or fish. No access to the target well is required.
The Magnetic Guidance Tool (MGT) is a downhole electromagnetic source for deployment in a reference well to enable drilling a second well at a controlled separation. The MGT can be used in quasi-static mode with conventional MWD systems, or for longer range applications (greater than 50 feet), with a standard Wellspot tool.
Vector Magnetics Wellspot tools measure and report distance and direction to a target using active electromagnetic and passive magnetic methods.
Location of the target is computed using Wellspot data and borehole surveys. Target drift angle and direction are analyzed and projected ahead.
Drilling well plans to intersect, re-enter, or avoid the target are developed in conjunction with directional drilling and operating company personnel.
Wellspot and Wellspot RGR Tools operated on a standard 7-conductor wireline, provided by open hole logging companies. No access to the target well is required. The equipment is portable and compact for fast and easy transport worldwide. Wellspot MGT Tools operate off of standard single conductor wirelines and require access to the target well.
|Wellspot Tools||Range||Precision||Direction to Target||O.D.||Temp||Pressure|
|RGR I||25 ft.||+/- 5%||+/- 3°||4.5"||350° F||20,000 psi|
|200 ft.||+/- 20%||+/- 3°|
|RGR II||10 ft.||+/- 5%||+/- 3°||2.0"||350° F||25,000 psi|
|200 ft.||+/- 20%||+/- 3°|
|Wellspot||250 ft.||+/- 20%||+/- 3°||2.0"||400° F||25,000 psi|
|MGT I with Wellspot||200 ft.||+/- 5%||+/- 3°||3.5"||275° F||20,000 psi|
|MGT II with MWD||60 ft.||+/- 3% @ 30 ft.||+/- 3°||2.0"||275° F||15,000 psi|
|U.S. Patent Numbers||Canadian Patent Numbers|
|4,372,398||5,218,301||British Patent Numbers:|
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236 Cherry Street Ithaca, New York 14850 United States
Tel: (607) 273-8351
Fax: (607) 273- 6137