Abstract: The present invention relates to a motor for an electrodynamic loudspeaker, comprising a magnetic circuit assembly arranged about a motor axis. The magnetic circuit assembly comprises: an outer magnet, a magnetically permeable top plate, a magnetically permeable bottom plate, a center pole piece and an air gap for receipt of a voice coil. The air gap is formed by an inner axially extending wall of the magnetically permeable top plate facing an axially extending peripheral wall section of the center pole piece to define a width, a bottom, a top and height of the air gap. The magnetic circuit assembly additionally comprises outwardly projecting magnetically permeable member arranged above the top of the air gap. The center pole piece comprises a magnetic member extending axially from at least the bottom of the air gap to a magnetically permeable bottom member or to the magnetically permeable bottom plate.

Abstract: A technique is provided to limit the number of vehicles required during a well project involving a plurality of well construction related procedures. The technique utilizes a transport vehicle able to receive a plurality of equipment modules that may be used for specific well related procedures. The modules may be interchanged with other vehicles for performance of specific procedures corresponding to specific modules.

Abstract: A technique is provided to limit the number of vehicles required during a well project involving a plurality of well construction related procedures. The technique utilizes a modular unit, e.g. a vehicle, and a plurality of modules that may be interchanged on the modular unit according to the scheduled well procedure. A separate crane unit can be used to move the modules to and from the vehicle as required for specific phases of well construction.