UPGRADING YOUR API THREADS How to go from API to the FCR Ring - The TDI FCR connection provides the following benefits:- The TDI FCR connection system is a means of extending the performance of your API connections both in tubing and casing. The FCR ring is a “patented” drop-in or press fit convertible metal ring that occupies what would be the open “J” area of an API connection. In conjunction with the special pin end finish, the design permits the pin ends to shoulder in the coupling, providing a high torque, power tight make-up. The FCR ring enhances the connection’s structural strength and provides an axial metal- to-metal seal to complement the thread seal. Also, the use of the FCR Ring results in an internally flush bore for improved bending, compression and torsional resistance, especially for Drilling with Casing (DWC) and horizontal coal bed methane (CBM) and shale gas drilling where the casing has to be rotated into the well prior to cementing. We have a range of data sheets from 2-3/8” to 4- 1/2” tubing sizes and, from 5-1/2” to 20” casing sizes. These data sheets and the complete price list for all sizes, weights and grades are available upon request.