Suction device for drilling mud
Suction device for subsoil drilling rigs includes: a main body, having at least one internally hollow cylindrical body; a rotary actuator associated with the main body; a rotation shaft extending within the cylindrical body. The rotation shaft is interlocked with the rotary actuator and has an end portion axially protruding from the cylindrical body. The device further includes a terminal element, mounted on the end portion of the rotation shaft and having a plurality of circumferential openings putting the inside of the cylindrical body in fluidic communication with the outside environment. The suction device further includes a cleaning device. The cleaning device includes a plurality of protrusions substantially integral with the cylindrical body; each protrusion extends into a respective one of the openings, thus cleaning such openings during a rotation of the terminal element.
1 . A suction device for drilling muds, comprising:
a main body, having at least one internally hollow cylindrical body;
a rotary actuator connected to said main body;
a rotation shaft extending within said internally hollow cylindrical body, said rotation shaft being operably connected to said rotary actuator and having an end portion axially protruding from said cylindrical body;
a rotatable terminal element mounted on the end portion of said rotation shaft and having a plurality of connected, axially spaced coaxial rings defining a plurality of circumferential openings placing an interior of said rotatable terminal element in fluidic communication with the environment external of the rotatable terminal element interior; and
a fixed cleaning device, arranged externally of the rotatable terminal element, comprising:
a plurality of protrusions substantially integral with said cylindrical body, each protrusion extending into a respective one of said circumferential openings, thus clearing said circumferential openings during a rotation of said rotatable terminal element.
2 . The suction device according to claim 1 , further comprising:
a suction member in fluidic communication with said main body for sucking drilling fluid into said internally hollow cylindrical body through said circumferential openings when said rotatable terminal element is immersed in said drilling fluid.
3 . The suction device according to claim 1 , wherein said rotatable terminal element further comprises:
a supporting wall to which each of said axially spaced coaxial rings is attached; and
a closing element, mounted on a side of said axially spaced coaxial rings opposite said internally hollow cylindrical body.
4 . The suction device according to claim 3 , wherein said axially spaced coaxial rings and said supporting wall are made as one piece.
5 . The suction device according to claim 3 , wherein said supporting wall extends in a direction parallel to an axis of said rotation shaft between a proximal ring and a distal ring of said axially spaced coaxial rings.
6 . The suction device according to claim 3 , wherein said supporting wall has, in a plan view, a curved shape which conforms to an internal radial profile of said axially spaced coaxial rings.
7 . The suction device according to claim 1 , wherein said rotary actuator is an electric motor.
8 . The suction device according to claim 1 , further comprising a supporting flange extending radially from an axially terminal portion of said internally hollow cylindrical body, wherein said fixed cleaning device comprises a supporting element fixed to said supporting flange, said protrusions extending from said supporting element.
9 . The suction device according to claim 1 , wherein said protrusions extend radially into said circumferential openings.
10 . The suction device according to claim 1 , wherein each of said protrusions extend into said circumferential openings in the same radial direction.
11 . A survey system for subsoil drilling rigs, comprising:
a suction device for drilling muds, comprising:
a main body, having at least one internally hollow cylindrical body;
a rotary actuator connected to said main body;
a rotation shaft extending within said internally hollow cylindrical body, said rotation shaft being operably connected to said rotary actuator and having an end portion axially protruding from said cylindrical body;
a rotatable terminal element mounted on the end portion of said rotation shaft and having a plurality of connected, axially spaced coaxial rings defining a plurality of circumferential openings placing an interior of said rotatable terminal element in fluidic communication with the environment external of the rotatable terminal element interior; and
a fixed cleaning device, arranged externally of the rotatable terminal element, comprising:
a plurality of protrusions substantially integral with said cylindrical body, each protrusion extending into a respective one of said circumferential openings, thus clearing said circumferential openings during a rotation of said rotatable terminal element;
a degassing device for receiving drilling fluid from the suction device and separating said drilling fluid into a gaseous component and a substantially liquid part; and
one or more analysis devices configured to receive said gaseous component and execute analyses on said gaseous component.
12 . A subsoil drilling rig, comprising:
a support structure;
a motorized member;
a drill bit, rotatably activated by said motorized member in order to drill a well;
a structure of pipes connecting said motorized member to said drill bit;
a feeding structure for causing a drilling fluid to flow into said well through said pipes;
a return duct in which said drilling fluid flows as it returns from said well;
a survey system for subsoil drilling rigs, comprising:
a suction device for drilling muds, comprising:
a main body, having at least one internally hollow cylindrical body;
a rotary actuator connected to said main body;
a rotation shaft extending within said internally hollow cylindrical body, said rotation shaft being operably connected to said rotary actuator and having an end portion axially protruding from said cylindrical body;
a rotatable terminal element mounted on the end portion of said rotation shaft and having a plurality of connected, axially spaced coaxial rings defining a plurality of circumferential openings placing an interior of said rotatable terminal element in fluidic communication with the environment external of the rotatable terminal element interior; and
a fixed cleaning device, arranged externally of the rotatable terminal element, comprising:
a plurality of protrusions substantially integral with said cylindrical body, each protrusion extending into a respective one of said circumferential openings, thus clearing said circumferential openings during a rotation of said rotatable terminal element;
a degassing device for receiving drilling fluid from the suction device and separating said drilling fluid into a gaseous component and a substantially liquid part; and
one or more analysis devices configured to receive said gaseous component and execute analyses on said gaseous component;
wherein said rotatable terminal element is immersed in said drilling fluid returning from said well.