Mill, whipstock, and anchor assembly, method and system
A mill, whipstock, and anchor assembly, including a mill, a whipstock attached to the mill, an anchor attached to the whipstock, the anchor having a kinetic energy releaser, the releaser including an energetic material, and a sensor in the assembly, the sensor configured to respond to a selected parameter by sending a first signal. A method for setting an anchor of the assembly, the method including causing a condition to exist at the sensor that at least reaches a threshold for the sensor to generate the first signal, igniting the energetic material, disappearing the releaser, and applying kinetic energy to a slip to set the anchor. A borehole system, including a borehole in a subsurface formation, a string disposed in the borehole, and the mill, whipstock, and anchor assembly disposed within or as a part of the string.
1 . A mill, whipstock, and anchor assembly, comprising:
a mill;
a whipstock attached to the mill;
an anchor attached to the whipstock, the anchor having a kinetic energy releaser, the releaser including an energetic material; and
a sensor in the assembly, the sensor configured to respond to a selected parameter by sending a first signal.
2 . The assembly as claimed in claim 1 , wherein the first signal is an electric signal.
3 . The assembly as claimed in claim 1 , wherein the sensor is a pressure sensor.
4 . The assembly as claimed in claim 1 , wherein the sensor is located within the anchor.
5 . The assembly as claimed in claim 1 , wherein the sensor is located within the mill.
6 . The assembly as claimed in claim 5 , wherein the sensor senses one of pressure within the mill, pressure outside of the mill, or both pressure within and pressure outside of the mill.
7 . The assembly as claimed in claim 1 , wherein the releaser is a disappear-on-demand material.
8 . The assembly as claimed in claim 1 , wherein the releaser is entirely an energetic material.
9 . The assembly as claimed in claim 1 , wherein the releaser responds directly to the first signal.
10 . The assembly as claimed in claim 1 , wherein the releaser responds to a second signal generated in an electronics package that generates the second signal in response to receipt of the first signal.
11 . The assembly as claimed in claim 1 , wherein the energetic material is configured to ignite a disappear-on-demand material.
12 . The assembly as claimed in claim 1 , wherein the releaser prior to release extends from a drive bar and interacts with an abutment surface of a housing of the anchor.
13 . The assembly as claimed in claim 12 , wherein the drive bar is in contact with a source of potential energy.
14 . A method for setting an anchor of the assembly claimed in claim 1 , the method comprising:
causing a condition to exist at the sensor that at least reaches a threshold for the sensor to generate the first signal;
igniting the energetic material;
disappearing the releaser; and
applying kinetic energy to a slip to set the anchor.
15 . The method as claimed in claim 14 , wherein the causing is pressurizing a volume of fluid to which the sensor is exposed.
16 . The method as claimed in claim 15 , wherein the pressurizing includes closing a blowout preventer.
17 . The method as claimed in claim 14 , wherein the applying includes releasing potential energy stored in a spring.
18 . A borehole system, comprising:
a borehole in a subsurface formation;
a string disposed in the borehole; and
the mill, whipstock, and anchor assembly as claimed in claim 1 disposed within or as a part of the string.