A retractable auger boring cutter head. The cutter head has fixed cutters and at least one pivoting cutter. The pivoting cutter is biased to a position that extends beyond a diameter of a casing being installed. When pulled back through the casing, a surface of the pivoting cutter contacts the casing, reducing the effective diameter of the cutter head and allowing it to be removed.

A drilling device for drilling a hole in the ground and/or rock and having in its drilling head a plurality of drilling wing bits arranged at equal distribution with their mutual position being adjustable such that the wing bits are located within a minimum diameter dimension and, on the other hand, adjustable such that they are located to drill a hole with a maximum size diameter and that the drilling device is arranged to pull, during drilling, a protective pipe into the hole at least when drilling the hole in the ground. An outer circumference of the wing bits includes a circumferential groove arranged to receive a ring belonging to a front part of the protective pipe, to an inner surface thereof, when the wing bits are adjusted to a diameter size substantially larger than the minimum diameter dimension in order to pull the protective pipe via the wing bits.

A drilling device for drilling a hole in the ground and/or rock and having in its drilling head a plurality of drilling wing bits arranged at equal distribution with their mutual position being adjustable such that the wing bits are located within a minimum diameter dimension and, on the other hand, adjustable such that they are located to drill a hole with a maximum size diameter and that the drilling device is arranged to pull, during drilling, a protective pipe into the hole at least when drilling the hole in the ground. An outer circumference of the wing bits includes a circumferential groove arranged to receive a ring belonging to a front part of the protective pipe, to an inner surface thereof, when the wing bits are adjusted to a diameter size substantially larger than the minimum diameter dimension in order to pull the protective pipe via the wing bits.

A retractable auger boring cutter head. The cutter head has fixed cutters and at least one pivoting cutter. The pivoting cutter is biased to a position that extends beyond a diameter of a casing being installed. When pulled back through the casing, a surface of the pivoting cutter contacts the casing, reducing the effective diameter of the cutter head and allowing it to be removed.

A drilling device for drilling a hole in the ground and/or rock and having in its drilling head a plurality of drilling wing bits arranged at equal distribution with their mutual position being adjustable such that the wing bits are located within a minimum diameter dimension and, on the other hand, adjustable such that they are located to drill a hole with a maximum size diameter and that the drilling device is arranged to pull, during drilling, a protective pipe into the hole at least when drilling the hole in the ground. An outer circumference of the wing bits includes a circumferential groove arranged to receive a ring belonging to a front part of the protective pipe, to an inner surface thereof, when the wing bits are adjusted to a diameter size substantially larger than the minimum diameter dimension in order to pull the protective pipe via the wing bits.

A drilling device for drilling a hole in the ground and/or rock and having in its drilling head a plurality of drilling wing bits arranged at equal distribution with their mutual position being adjustable such that the wing bits are located within a minimum diameter dimension and, on the other hand, adjustable such that they are located to drill a hole with a maximum size diameter and that the drilling device is arranged to pull, during drilling, a protective pipe into the hole at least when drilling the hole in the ground. An outer circumference of the wing bits includes a circumferential groove arranged to receive a ring belonging to a front part of the protective pipe, to an inner surface thereof, when the wing bits are adjusted to a diameter size substantially larger than the minimum diameter dimension in order to pull the protective pipe via the wing bits.

The invention relates to an arrangement for enabling well developing. The invention, particularly relates to an arrangement for enabling well developing comprising a top part, a middle part, and a bottom part. The top part has a clamp and wire safety catch for tightly connecting the air hose and the air pipe. The massive amount of the pressurized air is used for well developing. At the middle part, the pressurized air is mixed with the water blowing/pulling out from the siphon. The bottom part has opening outlet of the cone shape, which helps in spreading the air evenly down to the deflector plate. This further helps slightly shooting air into the sides cleaning the perforations directly and redirects the air up instead of blindly down. Also the hundreds of gallons of water falling back down will also put pressure on the deflector plate forcing it deeper into the well. The arrangement is particularly useful for well developing at more than 100 ft underneath the surface of the earth.

The invention relates to an arrangement for enabling well developing. The invention, particularly relates to an arrangement for enabling well developing comprising a top part, a middle part, and a bottom part. The top part has a clamp and wire safety catch for tightly connecting the air hose and the air pipe. The massive amount of the pressurized air is used for well developing. At the middle part, the pressurized air is mixed with the water blowing/pulling out from the siphon. The bottom part has opening outlet of the cone shape, which helps in spreading the air evenly down to the deflector plate. This further helps slightly shooting air into the sides cleaning the perforations directly and redirects the air up instead of blindly down. Also the hundreds of gallons of water falling back down will also put pressure on the deflector plate forcing it deeper into the well. The arrangement is particularly useful for well developing at more than 100 ft underneath the surface of the earth.

A drill for excavating a bore in the earth includes a steerable primary boring tool, a secondary boring tool and a sensor. The steerable primary boring tool is configured to excavate a primary bore. The secondary boring tool is configured to excavate a plurality of side bores that extend outward from the primary bore at a plurality of azimuthal locations around the primary bore. The sensor is configured to detect a mineral property in the earth adjacent each of the side bores.

Here is presented a drill bit (1) which includes a pilot bit (2) and a reamer. The pilot bit (2) includes a body (3) and a drilling surface (4). The drill bit (1) is arranged to provide a hole for a pipe to be installed in the ground. The reamer comprises at least one wing (7) which is turnably pivoted to the body (3) of the pilot bit (2) such that the wing (7), when turned to a drilling position, extends outside the outer circle of the body (3) of the pilot bit (2) and, when turned to a position turned forwards from the drilling position, the wing (7) does not extend outside the outer circle of the body (3) of the pilot bit (2).