Premium threaded connection and method for making same
A method of converting a tubular having NC46 connections to CET®43 connections. A method of applying a CET®43 thread to a pin connection or a box connection or both. A box connection and a pin connection of the tubular are machined and a CET®43 thread applied to the box connection and the pin connection.
1. A method comprising:
providing a tubular having an NC46 box connection and an NC46 pin connection;
reducing a box outer diameter of the NC46 box connection and enlarging a box inner diameter of the NC46 box connection to provide a prepared box connection;
applying a box premium thread to the prepared box connection;
reducing a pin outer diameter of the NC46 pin connection and enlarging a pin inner diameter of the NC46 pin connection to provide a prepared pin connection; and
applying a pin premium thread to the prepared pin connection, wherein the tubular is provided with a box premium connection and a pin premium connection,
wherein the box premium thread comprises a CET®43 box thread, wherein the pin premium thread comprises a CET®43 pin thread, and wherein the box premium connection and the pin premium connections are CET®43 connections.
2. The method of claim 1 , further comprising heating a hardband portion of the NC46 box connection to about 950 degrees Fahrenheit prior to reducing the outer diameter.
3. The method of claim 1 , further comprising phosphating the CET®43 connections.
4. The method of claim 3 , further comprising applying a make and break process to the CET®43 connections.
5. The method of claim 1 , wherein the CET®43 connections have an outer diameter of about 5.375″ and wherein the CET®43 connections have an inner diameter of about 3″.
6. The method of claim 1 , wherein the CET®43 box threads have a pitch of about 0.25″ (4 TPI), an angle of about 60 degrees, a crest to root height of about 0.092500″, a taper of about 1.5 in/ft, a crest width of about 0.067″, and a root width of about 0.076″.
7. The method of claim 1 , wherein the CET®43 pin threads have a pitch of about 0.25″ (4 TPI), an angle of about 60 degrees, a crest to root height of about 0.092504″, a taper of about 1.5 in/ft, a crest width of about 0.076″, and a root width of about 0.067″.
8. The method of claim 1 , wherein the tubular is previously used or is reconditioned.
9. The method of claim 1 , further comprising performing a wellbore operation using the tubular having CET®43 connections.
10. The method of claim 9 , wherein the wellbore operation comprises horizontal drilling or hydraulic fracturing or both.
11. A method of converting a tubular having NC46 connections to CET®43 connections, comprising:
providing the tubular, having an NC46 box connection and an NC46 pin connection;
heating a hardband portion of the NC46 box connection to about 950 degrees Fahrenheit and reducing a box outer diameter of the NC46 box connection;
enlarging a box inner diameter of the NC46 box connection, wherein a prepared box connection is provided;
applying a CET®43 box thread to the prepared box connection, wherein the CET®43 threads have a pitch of about 0.25″ (4 TPI), an angle of about 60 degrees, a crest to root height of about 0.092500″, a taper of about 1.5 in/ft, a crest width of about 0.067″, and a root width of about 0.076″;
reducing a pin outer diameter of the NC46 pin connection; enlarging an inner diameter of the pin connection, wherein a prepared pin connection is provided; and
applying a CET®43 pin thread to the prepared pin connection, wherein the CET®43 threads have a pitch of about 0.25″ (4 TPI), an angle of about 60 degrees, a crest to root height of about 0.092504″, a taper of about 1.5 in/ft, a crest width of about 0.076″, and a root width of about 0.067″.
12. The method of claim 11 , wherein the CET®43 connections have an outer diameter of about 5.375″ and wherein the CET®43 connections have an inner diameter of about 3″.