Device for Determining Point at Which Pipe is Stuck in a Well (Patent No: 483770)

Inventor: McCullough Tool Company (assignee)

Location: Los Angeles, CA

Comments: N/A

Description: The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced members expansible radially so as to frictionally engage the wall of the pipe and means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe; conductors forming an electric circuit; means producing an electrification of said circuit; electrical control means connected to said members so as to be actuated in response to relative rotation of said members, said control means having parts acting to change an electrical characteristic of said electrification when there occurs relative rotation of said members; and electro-responsive indicating means coupled with said circuit, operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative rotation of said members.

2. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said organization having spaced members expansible radially so as to frictionally engage the wall of the pipe and means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe; conductors forming an electric circuit extending from the top of' the well to said assembly; means producing an electrification of said circuit; electrical control means connected to said members so as to be actuated in response to relative rotation of said members, said control means having parts acting to change an electrical characteristic of said electrification when there occurs relative rotation of said members; and electro-responsive indicating means at the top of the well coupled with said circuit, operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative rotation of said members.

3. In a device for determining the point at; which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced members expansible radially so as to frictionally engage the wall of the pipe and means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe; conductors forming an electric circuit; means producing an electrification of said circuit; electrical control means connected to said members so as to be actuated in response to relative rotation of said members, said control means haitng parts acting to change an electrical characteristic of said electrification when there occurs relative rotation of said members; and electro-responsive indicating means at the top of the well coupled with said circuit, operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative rotation of said members.

4. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced expansible members comprising, bow springs to frictionally engage the wall of the pipe and vertically extending means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe, one of said members being rotatable relative to said vertically extending means; conductors extending in proximity to said assembly and forming an electric circuit; means producing an electrification of said circuit; electrical control means forming a part of said assembly and connected to said vertically extending means and one of said members so as to ,be actuated in response to relative rotation of said members, said control means having parts acting to change an electrical characteristic of said electrification when there occurs relative rotation of said members; and electro-responsive indicating means coupled with said circuit, operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative rotation of said members.

5. In a device for determining the point at which a pipe is stuck in a well, the combination or an assembly adapted to be lowered into the pipe, said assembly having spaced expansible members comprising bow springs to frictionally engage the wall of the pipe and vertically extending means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe, one of said members being rotatable relative to said vertically extending means; conductors extending in proximity to said assembly and forming an electric circuit extending from the top of the well to said assembly; means producing an electrification of said circuit; electrical control means forming a part of said organization and connected to said vertically extending mean and one of said members so as to be actuated in response to relative rotation of said members, said control means having parts acting to change an electrical characteristic of said electrification when there occurs relative rotation of said members; and electro-responsive indicating means at the top of the well coupled with said circuit, operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative rotation of said members.

6. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced expansible members comprising bow springs to frictionally engage the wall of the pipe and vertically extending means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe; conductors extending in proximity to said assembly and forming an electric circuit extending from the top of the well to said assembly; means at the top of the well for producing an oscillating electric current flow in said circuit; electrical control means forming a part of said assembly and connected to said members so as to be actuated in response to relative rotation of said members, said control means having a variable inductance acting to change an electrical characteristic of said electrical flow when there occurs relative rotation of said members; and electro-responsive indicating means at the top of the well coupled with said circuit comprising a meter operative to indicate said change in said characteristic of said electrical flow and thereby indicate that there has been a relative rotation of said members.

7. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced expansible members comprising bow springs to engage the wall of the pipe so that said members will be moved by movement of the portions of said pipe wall engaged by said bow springs and vertically extending means connecting said members so that they may be moved relatively to each other in response to deformation of the portion of the ,pipe between said bow springs, one of said members being movable relative to said vertical extending means; conductors extending in proximity to said assembly and forming an electric circuit; means producing an electrification of said circuit; electrical control means forming a part of said assembly and connected to said vertically extending means and one of said members so as to be actuated in response to relative movement of said members, said control means having parts acting to change an electrical characteristic of said electrification when there occurs relative movement of said members; and electro-responsive indicating means coupled with said circuit operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative movement of said members.

8. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced members expansible radially so as to engage the wall of the pipe so that said members will be moved by movement of the portions of said pipe which said members engage, and means connecting said members so that they may be moved relatively to each other in response to deformation of the portion of the pipe between said members when a deforming force is applied to the pipe; conductors forming an electric circuit; means producing an electrification of said circuit; electrical control means connected to said members so as to be actuated in response to relative movement of said members, said control means having parts acting to change an electrical characteristic of said electrification when there occurs relative movement of said members; and electro-responsive indicating means coupled with said circuit, operative to indicate said change in said characteristic of said electrification and thereby indicate that there has been a relative movement of said members.

9. In a device for determining the point at which a pipe is stuck in a well, the combination of: assembly adapted to be lowered into the pipe, said assembly having spaced members expansible radially so as to engage the wall of the pipe so that said members will be moved by movement of the portions of said pipe which said members engage, and means connecting said members so that they may be moved relatively to each other in response to deformation of the portion of the pipe between said members when a deforming force is applied to the pipe; and indicating means for indicating relative movement of said members as the result of said deformation of the pipe, said indicating means comprising one part connected to one of said members and other part connected to the other of said members so that there will be relative movement of said parts as the result of relative movement of said members, and means adapted to respond to relative movement of said parts and including means for registering said last named relative movement as an indication that there has been deformation of said portion of the pipe.

10. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced expansible members comprising bow springs to engage the wall of the pipe so that said members will be moved by movement of the portions of said pipe wall engaged by said bow springs and vertically extending means connecting said members so that they may be moved relatively to each other in response to deformation of the portion of the pipe between said bow springs one of said members being movable relative to said vertical extending means; and indicating means for indicating relative movement of said members as the result of said deformation of the pipe, said indicating means comprising one part connected to one of said members and another part connected to the other of said members so that there will be relative movement of said parts as the result of relative movement of said members and means adapted to respond to relative movement of said parts as an indication that there has been deformation of said portion of the pipe.

11. In a device for determining the point at which a pipe is stuck in a well, the combination of: an assembly adapted to be lowered into the pipe, said assembly having spaced members expansible radially so as to engage the wall of the pipe so that said members will be moved by movement of the portions of said pipe which said members engage, and means connecting said members so that they may be relatively rotated around the axis of the pipe in response to torsional deformation of said pipe; and indicating means for indicating relative rotation of said members as the result of said deformation of the pipe, said indicating means comprising one part connected to one of said members and another part connected to the other of said members so that there will be relative movement of said parts as the result of relative rotation of said members, and means adapted to respond to relative movement of said parts as an indication that there has been deformation of said portion of the pipe.