Method and apparatus to perforate pipe

Claim 2

Pipe perforating apparatus comprising support means; a cam wheel rotatably secured to said support means and positionable in rolling engagement with a pipe; a shaft; a drill bit secured to said shaft; means movably securing said shaft relative to the support means; means secured to the shaft to rotate said shaft; actuated means secured between said shaft and said support means to move said shaft toward a pipe disposed in engagement with said cam wheel; actuating means associated with said cam wheel, said actuating means being arranged to actuate the actuated means to move the shaft toward a pipe; and means secured between said shaft and said support means for moving the shaft away from a pipe in engagement with said cam wheel.

Claim 3

The combination called for in claim 1 wherein the means for moving the shaft away from the pipe comprises means to generate a signal responsive to longitudinal movement of the shaft; and wherein the actuated means is arranged to move the shaft away from the pipe responsive to generation of a signal by said means to generate a signal.

Claim 4

The combination called for in claim 1 wherein the shaft comprises an expandable coupling having interengaging means disposed therein in sliding relation with an output shaft of a motor.

Claim 5

The combination called for in claim 1 wherein the actuated means to move the shaft toward a pipe comprises, a cylinder having Ports in opposite ends thereof; a piston slidably disposed in the cylinder; means to deliver pressurized fluid through said ports to move the piston.

Claim 6

Perforating apparatus comprising: support means; a motor secured to said support means, said motor having a drive shaft; a driven shaft; means to movably secure the driven shaft relative to the support means; a cylinder having ports in opposite ends thereof, said driven shaft extending through said cylinder and through said ports; a piston slidably disposed in the cylinder; means securing said piston to said driven shaft; connector means securing the drive shaft to the driven shaft, said connector means being adapted to transmit rotational movement to said driven shaft while permitting longitudinal movement of the driven shaft; a drill bit secured to the driven shaft; valve means to deliver pressurized fluid to the inside of said cylinder, said valve means having a first position wherein pressurized fluid is delivered to the inside of said cylinder on one side of said piston and having a second position wherein pressurized fluid is directed to the inside of said cylinder on the opposite side of said piston; actuating means connected to said valve means, said actuating means being adapted to move the valve means between said first and second positions; means movable with a member to be perforated and associated with said actuating means such that said valve means is moved between said first and second positions in response to movement of the member to be perforated; and arm means secured to said driven shaft; a switch engageable by said arm means; a solenoid connected to said switch and operably connected to move said valve means between said first and second positions.

Claim 7

Perforating apparatus comprising: support means; a motor secured to said support means, said motor having a drive shaft; a driven shaft; means to movably secure the driven shaft relative to the support means; a cylinder having ports in opposite ends thereof, said driven shaft extending through said cylinder and through said ports; a piston slidably disposed in the cylinder; means securing said piston to said driven shaft; connector means securing the drive shaft to the driven shaft, said connector means being adapted to transmit rotational movement to said driven shaft while permitting longitudinal movement of the driven shaft; a drill bit secured to the driven shaft; valve means to deliver pressurized fluid to the inside of said cylinder, said valve means having a first position wherein pressurized fluid is delivered to the inside of said cylinder on one side of said piston and having a second position wherein pressurized fluid is directed to the inside of said cylinder on the opposite side of said piston; actuating means connected to said valve means, said actuating means being adapted to move the valve means between said first and second positions; means movable with a member to be perforated and associated with said actuating means such that said valve means is moved between said first and second positions in response to movement of the member to be perforated; and arm means secured to said driven shaft; a switch engageable by said arm means; a solenoid connected to said switch and operably connected to move said valve means between said first and second positions.

Claim 8

The combination called for in claim 5 wherein the connector means comprises splines on the drive shaft and a hub on the driven shaft having keyways formed therein to receive said splines, said splines being slidably disposed in said hub.

Claim 9

Perforating apparatus comprising: support means; a motor secured to said support means, said motor having a drive shaft; a driven shaft; means to movably secure the driven shaft relative to the support means; a cylinder having ports in opposite ends thereof, said driven shaft extending through said cylinder and through said ports; a piston slidably disposed in the cylinder; means securing said piston to said driven shaft; connector means securing the drive shaft to the driven shaft, said connector means being adapted to transmit rotational movement to said driven shaft while permitting longitudinal movement of the driven shaft; a drill bit secured to the driven shaft; valve means to deliver pressurized fluid to the inside of said cylinder, said valve means having a first position wherein pressurized fluid is delivered to the inside of said cylinder on one side of said piston and having a second position wherein pressurized fluid is directed to the inside of said cylinder on the opposite side of said piston; a solenoid operably connected to said valve means, said solenoid being adapted to move the valve means between said first and second positions; a wheel in rolling engagement with a member to be perforated; and a switch controlled by rotation of said wheel, said switch being connected to said solenoid such that said valve means is moved between said first and second positions in response to movement of the member to be perforated.

Claim 10

Perforating apparatus comprising: support means; a motor secured to said support means, said motor having a drive shaft; a driven shaft; means to movably secure the driven shaft relative to the support means; a cylinder having ports in opposite ends thereof, said driven shaft extending through said cylinder and through said ports; a piston slidably disposed in the cylinder; means securing said piston to said driven shaft; connector means securing the drive shaft to the driven shaft, said connector means being adapted to transmit rotational movement to said driven shaft while permitting longitudinal movement of the driven shaft; a drill bit secured to the driven shaft; valve means to deliver pressurized fluid to the inside of said cylinder, said valve means having a first position wherein pressurized fluid is delivered to the inside of said cylinder on one side of said piston and having a second position wherein pressurized fluid is directed to the inside of said cylinder on the opposite side of said piston; a solenoid operably connected to said valve means, said solenoid being adapted to move the valve means between said first and second positions; a wheel in rolling engagement with a member to be perforated; and a switch controlled by rotation of said wheel, said switch being connected to said solenoid such that said valve means is moved between said first and second positions in response to movement of the member to be perforated.