Mobile drilling rig

• US 9,677,298 B2
• Filed: 07/14/2015
• Issued: 06/13/2017
• Est. Priority Date: 07/14/2014
• Status: Active Grant

• Current Assignee: Dreco Energy Services ULC (National Oilwell Varco Incorporated)
• Original Assignee: Dreco Energy Services ULC (National Oilwell Varco Incorporated)
• Inventors: Konduc, Kameron Wayne, Stoik, Randy Steven
• Primary Examiner(s): Fox, Charles A
• Assistant Examiner(s): BUCKLE JR, JAMES J
• Application Number:
  US14/799,207
• Publication Number:
  US 20160010323A1
• Time in Patent Office: 700 Days
• Field of Search: 52 69
• CPC Class Codes: E04H 12/187 with hinged sections
• CPC Class Codes: E04H 12/345 Arrangements for tilting up whole structures or sections thereof E04H12/347 takes precedence
• CPC Class Codes: E21B 15/003 adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
• CPC Class Codes: E21B 7/02 Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting

Abstract

A drilling rig may include a pair of main beams supportable by a pair of rails, a substructure, an A-frame secured to the main beams, and a mast pivotably secured to the main beams and configured to lay down in a pre-erected stage. The substructure may include a plurality of pivoting legs, a drill floor having a plurality of spreaders pivotably supported by the plurality of pivoting legs, and a plurality of drill floor subassemblies supported by the plurality of spreaders. The plurality of pivoting legs supporting the spreaders may be configured to lay down in a pre-erected stage as well.

Claims

1. A drilling rig, comprising:

a pair of main beams supportable by a pair of rails;

a substructure comprising;

a plurality of pivoting legs;

a drill floor comprising a plurality of spreaders pivotably supported by the plurality of pivoting legs; and

a plurality of drill floor subassemblies supported by the plurality of spreaders;

an A-frame secured to the main beams; and

a mast pivotably secured to the main beams and configured to lay down in a pre-erected stage;

wherein the plurality of pivoting legs supporting the plurality of spreaders are configured to lay down in a pre-erected stage.

2. The drilling rig of claim 1, wherein the plurality of drill floor subassemblies comprise an enclosure.

3. The drilling rig of claim 1, wherein the substructure further comprises a pair of base boxes.

4. The drilling rig of claim 3, wherein the plurality of pivoting legs are pivotably connected to the pair of base boxes.

5. The drilling rig of claim 1, further comprising a cellar drop-in floor.

6. The drilling rig of claim 1, wherein in a pre-erected stage, the height of the rig is between 40-60 feet above the ground surface.

7. The drilling rig of claim 1, wherein the A-frame is pivotably secured to the main beams and configured to lay down in a pre-erected stage.

8. The drilling rig of claim 7, wherein in a pre-erected stage, the height of the rig is between 25-40 feet above the ground surface.

9. The drilling rig of claim 1, further comprising a pair of rotary table support beams.

10. The drilling rig of claim 1, wherein vertical loads of the mast and A-frame are isolated from the vertical loads of the drill floor and drill floor subassemblies.

11. A drilling rig, comprising:

an A-frame portion;

a mast portion; and

a substructure portion comprising;

a plurality of drill floor subassemblies; and

means for pivotably erecting the subassemblies,

wherein the A-frame portion and mast portion are secured to a pair of main beams supportable by a pair of rails, and

wherein the mast portion is pivotably secured to the pair of main beams and is configured to lay down in a pre-erected stage.

12. The drilling rig of claim 11, wherein the A-frame portion is pivotably secured to the pair of main beams and is configured to lay down in a pre-erected stage.

19. The drilling rig of claim 11, wherein the means for pivotably erecting the subassemblies includes means for pivotably erecting one or a subset of the plurality of subassemblies.

20. The drilling rig of claim 19, wherein the plurality of drill floor subassemblies are configured to collectively form a portion of a drill floor in an erected position.

21. The drilling rig of claim 11, wherein the plurality of drill floor subassemblies comprises a driller side subassembly and an off-driller side subassembly.

22. The drilling rig of claim 21, further comprising a spreader extending between the driller side subassembly and an off-driller side subassembly.

23. The drilling rig of claim 22, wherein the spreader is connected to the driller side subassembly and an off-driller side subassembly such that the spreader is erected simultaneously with the driller side subassembly and the off-driller side subassembly.

24. The drilling rig of claim 23, wherein the spreader is a drawworks spreader comprising a drawworks configured to pull the drawworks spreader, the driller side subassembly, and the off-driller side subassembly into an erected position.

13. A method for assembling a drilling rig, comprising:

installing a pair of main beams on a pair of rails;

installing a plurality of pivoting legs in a laying down position, and configured to pivot into an upright position;

installing a drill floor pivotably supported on the pivoting legs;

installing an A-frame;

installing a mast in a laying down position, and configured to pivot into an upright position;

erecting the mast by pivoting it into an upright position; and

erecting the drill floor by pivoting the pivoting legs into an upright position.

14. The method of claim 13, wherein erecting the mast is completing using a drawworks.

15. The method of claim 13, wherein erecting the drill floor is completed using a drawworks.

16. The method of claim 13, wherein in the laying down position, the height of the rig is between 40-60 feet above the ground surface.

17. The method of claim 13, wherein the A-frame is installed in a laying down position and configured to pivot into an upright position.

18. The method of claim 17, wherein in the laying down position, the height of the rig is between 25-40 feet above the ground surface.