Position make-up indicator system
A method is shown by which threaded pipe sections are connected to form a tubular joint having proper sealing positioning at proper make-up torque. A make-up stencil plate is manufactured for each specific size of pipe to be coupled at the specific taper and make-up loss of a given connection with very tight tolerance. The plate is placed on the pin pipe end of the connection. A dial indicator is placed on the outer surface of the pipe pin end with the indicator flush with the end of the stencil plate. Once the indicator is set to zero, the stencil plate is removed. Then a bucking unit or power tong is applied to the coupling. When the face of the coupling hits the tip of the indicator and the indicator is within the given tolerance, the operator stops the make-up process.
1. A method of connecting threaded pipe sections to form a made-up tubular connection having proper sealing positioning at proper make-up torque where the connection is a position make-up connection, the method consisting of:
providing a first pipe section in the form of a pipe pin member including an externally threaded pipe pin end;
providing a second mating pipe section in the form of a coupling member including oppositely arranged internally threaded box ends;
wherein the pipe sections are part of a pipe string of non-upset threaded and coupled connections with mating pin ends which contact to create a positive torque stop;
wherein the coupling which is mated with the first pipe section has internally threaded surfaces which are shoulderless surfaces;
providing a tubular make-up stencil plate manufactured at a specific taper and make-up loss for each of a series of desired size pipe connections and screwing the stencil plate onto the pipe pin end in mating threaded fashion, wherein the make-up stencil plate is a tubular member having an internally threaded surface which mates with the externally threaded face of the pipe pin member, the make-up stencil plate also having an internal shoulder stop which guarantees a proper zero point of the make-up plate on the mating pin member;
placing a dial indicator with an indicator tip and a magnetic base on the first pipe section with the indicator tip being flush against an outer extent of the make-up stencil plate, the dial indicator being held in proper position on the first pipe section by the magnetic base;
setting the dial indicator to a zero position;
removing the make-up stencil plate and installing a selected box end of the pipe coupling onto the pin end of the first pipe section hand tight;
thereafter, using a power torque device to torque the pipe coupling onto the first pipe section to a final position;
stopping the torque once an outer extent of the pipe coupling hits the tip of the dial indicator and the indicator shows a given predetermined tolerance;
verifying the final position of the position make-up connection with a manual scale to ensure that the final position is within a specified tolerance; and
thereafter installing a third pipe section with a pin end within an opposite end of the coupling.
2. The method of claim 1 , wherein the pipe string is a section of oilfield casing or tubing.
3. The method of claim 1 wherein the power torque device is a device selected from among the group consisting of power tongs and power bucking units.
4. The method of claim 3 , wherein the use of the position make-up plate can be used to control the position make-up within a range of thousandths of an inch.