Magnetic stuck pipe locator and detonator using a single line to transmit signals
US3129517A
Means for determining the inclination of well pipes
US3056453A
Releasing washover outside cutter
US3095736A
Stuck pipe locator
US3039544A
Method of and means for determining the inclination of well pipes
US2970859A
Grapple-type overshot
US3095926A
Apparatus for recovering objects in a well
ES238668A1
Device for testing one piece (Machine-translation by Google Translate, not legally binding)
US3005507A
Fluid by-pass for rotary drill bits
US2944794A
Drilling mud by-pass for rotary drill bits
US2959224A
Well hole cleaner and method
US2896917A
Hydrostatically balanced jar
US2899000A
Piston actuated casing mill
DE1111308B
Device for determining the location of a metal object located in a borehole
ES236291A1
A method for the determination of physical conditions in magnetizable pipes installed in the mood or hole of a well (Machine-translation by Google Translate, not legally binding)
ES236236A1
Apparatus for locating a metal object in a well engine (Machine-translation by Google Translate, not legally binding)
