DTC's Horizontal Well is a shallow 1623ft True Vertical Depth hole, having a 500ft horizontal section of 8.1/2" open hole below the 9.5/8" casing shoe.

The casing programme for the hole consisted of a 30" conductor casing set at 89ft in 38.1/2" OH. A dummy string of 13.3/8" casing was landed in the Sub Sea Wellhead with the shoe at 83ft. The 9.5/8" casing was run and cemented in 12.1/4" OH, the shoe depth being 974.6 ft.

A Dril-Quip 18.3/4" x 10k Sub Sea Wellhead system was welded to the 30" conductor casing; the connector profile is 18.3/4" x 10k Cameron Iron Works - Model 70 Collet Connector.

The 8.1/2" OH was drilled into the Granite Schist Formation which has proved to be sufficiently stable to leave uncased. This enables the running of full gauge 8.1/2" drilling tools into the hole for testing, evaluation and demonstration purposes. Should it be required, a liner can be run into the open hole for specific operations and subsequently recovered.

Horizontal Well Summary

• Elevations: Rotary Table - Ground level: 30.00 ft Rotary Table - S.S. WH body: 31.47 ft Rotary Table - Base of Collar: 39.50 ft
• Total Depth: 2426 ft (Driller's Measured Depth) from RT; 1623 ft TVD. angle build Section 1040 ft to 1926 ft. Rate of build 10/100 ft.
• Well Status: 9.5/8" casing cemented to Surface 8.1/2" OH - uncased - 974.6 ft to 2426 ft.
• Hole Sizes: 38.1/2" Augered to 89.00 ft 12.1/4" Drilled to 979.00 ft 8.1/2" Drilled to 2426.00 ft
• Wellhead: Dril-Quip 'Universal' Sub Sea Wellhead System 18.3/4' x 10,000 psi wp. Connector Profile - 18.3" x 10k Cameron Iron Works - Model 70 Collect Connector.
• Casing: 30" Conductor Casing; 1" wall x52 welded. Shoe Depth 89.00 ft; Cemented back to the Cellar floor. 13.3/8 casing : N80 68-72 lbs/ft. Shoe Depth 83.00 ft; Cemented back to the Cellar floor. 9.5/8" casing : L80 47 lbs/ft - Hunting Fox connection. Shoe Depth 974.60 ft; Cemented back to surface.
• Open Hole: 8.1/2" Open Hole from 979 ft to 2426 ft (MD). HORIZONTAL section 1926 ft to 2426 ft (MD).