Abstract: Method for inhibiting the swelling and/or the dispersion of shales during the treatment of subterranean shale formations comprising the steps of: a) providing a subterranean treatment fluid comprising from 0.001 to 10% by weight of a polyester obtained by reacting a dicarboxylic acid having from 2 to 8 carbon atoms with a specific alkoxylated diamine; b) introducing said treatment fluid into a wellbore at a pressure sufficient to treat the subterranean shale formations.

Abstract: A device for drilling side portions of large section members, the device being arranged in a cutting system for cutting individual section member lengths, starting from a long section member, comprises a base thereon swinging support arms extend, the support arms being arranged with a V pattern enclosing an angle (?), each support arm including a plurality of sliding rollers for causing the section member to slide thereon, the swinging arms including guides slidably supporting a controllably driven carriage operatively connected to a threaded screw, each threaded screw being operatively connected to a controllable motor, each carriage having a movable arm which may be controllably displaced along guides and comprising parallel guides engaging a drilling assembly operatively coupled to a driving shaft, each driving shaft being operatively connected to a corresponding controllable motor.

Abstract: A section member drilling or milling machine comprises a machine bed for supporting a workpiece to be drilled, the machine bed including guides for controllably sliding thereon a support comprising precision vertical guides thereon a platform is engaged, the platform comprising parallel horizontal guides slidably supporting a carriage, in turn supporting a cantilever arm, including a driving motor for controllably driving a drilling and milling tool along parallel guides of the cantilever arm.

Abstract: A section member drilling or milling machine comprises a machine bed for supporting a workpiece to be drilled, the machine bed including guides for controllably sliding thereon a support comprising precision vertical guides thereon a platform is engaged, the platform comprising parallel horizontal guides slidably supporting a carriage, in turn supporting a cantilever arm, including a driving motor for controllably driving a drilling and milling tool along parallel guides of the cantilever arm.

Abstract: A device for drilling side portions of large section members, the device being arranged in a cutting system for cutting individual section member lengths, starting from a long section member, comprises a base thereon swinging support arms extend, the support arms being arranged with a V pattern enclosing an angle (?), each support arm including a plurality of sliding rollers for causing the section member to slide thereon, the swinging arms including guides slidably supporting a controllably driven carriage operatively connected to a threaded screw, each threaded screw being operatively connected to a controllable motor, each carriage having a movable arm which may be controllably displaced along guides and comprising parallel guides engaging a drilling assembly operatively coupled to a driving shaft, each driving shaft being operatively connected to a corresponding controllable motor.

Abstract: A section member cutting or drilling machine tool comprises a bearing or supporting surface for bearing a metal section member work piece thereon, a sliding guide extending parallel to the feeding, cutting and unloading surface of the machine tool and slidably supporting a contact plate in the form of a controllably energizable, respectively disenergizable magnet, the magnet plate being controllably driven by a controllable motor which, through a geared unit, drives a pinion-rack assembly arranged parallel to the sliding guide.

Abstract: An engraving and marking device, usable in machine tools and the like, includes a supporting member provided with a coupling which is engaged by a spindle of a machine tool and supports a toolbit by means of an elastic support. The device is adapted to engrave and mark a piece being machined in a fully automatic manner.

Abstract: An engraving and marking device, usable in machine tools and the like, includes a supporting member provided with a coupling which is engaged by a spindle of a machine tool and supports a toolbit by means of an elastic support. The device is adapted to engrave and mark a piece being machined in a fully automatic manner.