Abstract: A method for continuously controlling fluid flow rates through a well (4) provides to shut off the drilling mud at the well inlet and outlet and detect measurements of flow rate and density of the drilling mud by a Venturi measuring device (10,2).

Abstract: An elevator device for drilling systems consisting substantially of a lifting device (2) cooperating with a loading device (3) applied to a drilling machine (4); said lifting device (2) taking a rod (100) or a casing (101) from a horizontal position to successively engage said rod or casing in a driving head (5) of a drilling machine (4), said device being directly mounted on the driving head and being driven by said driving head.

Abstract: A valve assembly for drilling systems comprising a bidirectional valve (1) cooperating with a hydraulic clamping device (2) and being applied to a drilling machine for supplying a drilling fluid in two discrete directions, the valve assembly comprising a valve outer body adapted to be arranged between drilling rods while allowing said rod to be exchanged while keeping the mud continuously circulating.

Abstract: A valve assembly for drilling systems comprising a bidirectional valve (1) cooperating with a hydraulic clamping device (2) and being applied to a drilling machine for supplying a drilling fluid in two discrete directions, the valve assembly comprising a valve outer body adapted to be arranged between drilling rods while allowing said rod to be exchanged while keeping the mud continuously circulating.

Abstract: A method for continuously controlling fluid flow rates through a well (4) provides to shut off the drilling mud at the well inlet and outlet and detect measurements of flow rate and density of said drilling mud by a Venturi measuring device (10,2).

Abstract: A valve assembly for drilling systems comprising a bidirectional valve (1) cooperating with a hydraulic clamping device (2) and being applied to a drilling machine for supplying a drilling fluid in two discrete directions, the valve assembly comprising a valve outer body adapted to be arranged between drilling rods while allowing said rod to be exchanged while keeping the mud continuously circulating.

Abstract: A method for continuously controlling fluid flow rates through a well (4) provides to shut off the drilling mud at the well inlet and outlet and detect measurements of flow rate and density of said drilling mud by a Venturi measuring device (10,2).

Abstract: An apparatus for switching off and deviating a circulating liquid flow without water hammering, comprising an apparatus body (10) including an inlet channel (11) which is split into two outlet channels (12, 13) in which respective flow valves (14, 15) are arranged; said apparatus body comprises moreover a discharging channel (16) coupled to said outlet channels through respective discharging valves (17, 18); said outlet channels being moreover coupled to respective pressure measuring chambers (19, 20); a balancing valve (21) communicating two middle zones (22, 23) respectively formed in the outlet channels.

Abstract: An apparatus for switching off and deviating a circulating liquid flow without water hammering, comprising an apparatus body (10) including an inlet channel (11) which is split into two outlet channels (12, 13) in which respective flow valves (14, 15) are arranged; said apparatus body comprises moreover a discharging channel (16) coupled to said outlet channels through respective discharging valves (17, 18); said outlet channels being moreover coupled to respective pressure measuring chambers (19, 20); a balancing valve (21) communicating two middle zones (22, 23) respectively formed in the outlet channels.

Abstract: A pressure compensator, particularly for oleodynamic applications, comprising two cylinders: a compensator cylinder in which is slidingly engaged a first piston comprising a first piston rod, and a reducing cylinder, in which is slidingly engaged a second piston comprising a second piston rod axially connected to the first piston rod; said compensator cylinder being coupled to a main oleodynamic cylinder; said compensator cylinder having a size so designed as to provide the same area ratio as that of the main cylinder, thereby to a set position of said main cylinder piston corresponding a precise position of the first piston of the compensator cylinder; said reducing cylinder comprising at least a low-pressure chamber coupled to a pressure gauge; a displacement of the reducing cylinder piston rod either increases or decreases a pressure in said low-pressure chamber, proportionately to a working pressure in the main cylinder.

Abstract: A method for continuously controlling fluid flow rates through a well (4) provides to shut off the drilling mud at the well inlet and outlet and detect measurements of flow rate and density of said drilling mud by a Venturi measuring device (10,2).

Abstract: A valve assembly for drilling systems comprising a bidirectional valve (1) cooperating with a hydraulic clamping device (2) and being applied to a drilling machine for supplying a drilling fluid in two discrete directions, the valve assembly comprising a valve outer body adapted to be arranged between drilling rods while allowing said rod to be exchanged while keeping the mud continuously circulating.

Abstract: An elevator device for drilling systems consisting substantially of a lifting device (2) cooperating with a loading device (3) applied to a drilling machine (4); said lifting device (2) taking a rod (100) or a casing (101) from a horizontal position to successively engage said rod or casing in a driving head (5) of a drilling machine (4), said device being directly mounted on the driving head and being driven by said driving head.