OPEN FACE DERRICK

• US 20100150661A1
• Filed: 12/12/2008
• Published: 06/17/2010
• Est. Priority Date: 12/12/2008
• Status: Abandoned Application

• Current Assignee: Woolslayer Companies, Inc.
• Original Assignee: Woolslayer Companies, Inc.
• Inventors: Vogt, Dewayne G.
• Application Number:
  US12/333,508
• Publication Number:
  US 20100150661A1
• Time in Patent Office: Days
• US Class Current: 405/201
• CPC Class Codes: E21B 15/02 specially adapted for underwater drilling E21B15/04 takes precedence

Abstract

An offshore oil derrick having a derrick tower, a derrick substructure, and a drilling floor. The derrick substructure is cantileverly supported by a hull, the derrick tower is supported by the derrick substructure, and the drilling floor is located on top of the derrick substructure below the derrick tower. The drilling floor comprises a v-door on the fore end; a well center approximately 40-50% of the floor length from the aft end; a plurality of setback areas; drawworks on the starboard side; a dynamic brake on the aft end of the drawworks; and a driller'"'"'s station. The derrick may further include a spare line spool connected to the derrick substructure on the forward end of the derrick.

Claims

1. An offshore oil derrick with a forward end, an aft end, a starboard side, and a port side, comprising:

a derrick tower;

a derrick substructure where said derrick substructure is cantileverly supported by a hull, wherein said derrick tower is supported by said derrick substructure; and

a drilling floor located on top of said derrick substructure below said derrick tower;

where said drilling floor includes;

a v-door on the fore end;

a well center approximately 40-50% of the floor length from the aft end;

a plurality of setback areas;

drawworks on the starboard side;

a dynamic brake on the aft end of the drawworks; and

a driller'"'"'s station.

2. The offshore oil derrick of claim 1 further comprising a spare line spool connected to the derrick substructure on the forward end of the derrick.

3. The offshore oil derrick of claim 2 where said spare line spool is connected to the derrick substructure toward the port side of the forward end of the derrick.

4. The offshore oil derrick of claim 1 where said plurality of setback areas are located on either side of said v-door on the forward end.

5. The offshore oil derrick of claim 1 where said well center is centered on said drilling floor.

6. The offshore oil derrick of claim 5 where the derrick tower is symmetrical.

7. The offshore oil derrick of claim 6 where the derrick tower has a square base.

8. The offshore oil derrick of claim 1 further comprising pipe handling equipment such that an operator may build derrick triple stands outside the setback area in an unencumbered space on the drilling floor.