Alignable guidance device for casing entry milling and cementing operations
An alignable guidance device includes a tube section and a casing milling shoe within the tube section, a pre-contoured tube within the casing milling shoe that terminates in an exit point in the tube section, the pre-contoured tube exiting the tube section at an exit angle of between 0° and 45°. The alignable guidance device also includes guidance sensors within the tube section and a guidance device EM communications system within the tube section, the guidance device EM communications system in electrical communication with the guidance sensors.
1 . An alignable guidance device, comprising:
a tube section, the tube section including a lower tube portion and an upper tube portion, the lower tube portion having an end plate;
a casing milling shoe within the tube section, a pre-contoured tube within the casing milling shoe that terminates in an exit point in the tube section;
guidance sensors within the end plate of the tube section, proximate the exit point;
a guidance communications system within the lower tube section, the guidance communications system in electrical communication with the guidance sensors; and
a gap, the gap including electrical insulation, the gap positioned between the lower tube portion and the upper tube portion.
2 . The alignable guidance device of claim 1 further comprising a turbine rpm sensor positioned within the tube section.
3 . The alignable guidance device of claim 1 , wherein the guidance communications system includes a controller and a battery.
4 . The alignable guidance device of claim 1 , wherein the pre-contoured tube is in the shape of a slim curved bore section within the tube section.
5 . The alignable guidance device of claim 1 , wherein the pre-contoured tube has a coned starting hole opposite the exit of the pre-contoured tube.
6 . The alignable guidance device of claim 1 , wherein the casing milling shoe is made of epoxy, cement, or steel.
7 . The alignable guidance device of claim 1 , wherein the tube section has a notch proximate the exit point.
8 . An alignable guidance device, comprising:
a tube section, the tube section including a lower tube portion and an upper tube portion the lower tube portion having an end plate;
a casing milling shoe within the tube section, a pre-contoured tube within the casing milling shoe that terminates in an exit point in the tube section;
guidance sensors within the end plate of the tube section, proximate the exit point;
a wireline transceiver positioned within the lower portion of the tube section in electrical connection with the guidance sensors and the surface of the earth; and
a gap, the gap including electrical insulation, the gap positioned between the lower tube portion and the upper tube portion.
9 . The alignable guidance device of claim 8 , further comprising a battery positioned in the tube section, the battery in electrical connection with the wireline transceiver.
10 . The alignable guidance device of claim 8 further comprising a turbine rpm sensor positioned within the tube section and in electrical communication with the wireline transceiver.
11 . The alignable guidance device of claim 8 , wherein the pre-contoured tube is in the shape of a slim curved bore section within the tube section.
12 . The alignable guidance device of claim 8 , wherein the pre-contoured tube has a coned starting hole opposite the exit of the pre-contoured tube.
13 . The alignable guidance device of claim 8 , wherein the casing milling shoe is made of epoxy, cement, or steel.
14 . The alignable guidance device of claim 8 , wherein the tube section has a notch proximate the exit point.
15 . The alignable guidance device of claim 8 further comprising a rate of penetration sensor positioned in the lower tube portion proximate the pre-contoured tube.
16 . The alignable guidance device of claim 15 further comprising a turbine rpm sensor positioned in the lower tube portion proximate the pre-contoured tube.