Side saddle slingshot drilling rig

• US 10,214,936 B2
• Filed: 06/06/2017
• Issued: 02/26/2019
• Est. Priority Date: 06/07/2016
• Status: Active Grant

• Current Assignee: Nabors Drillling Technologies USA, Inc.
• Original Assignee: Nabors Drillling Technologies USA, Inc.
• Inventors: Reddy, Padira, Gupta, Jr., Ashish
• Primary Examiner(s): Ihezie, Joshua K
• Application Number:
  US15/615,322
• Publication Number:
  US 20170350153A1
• Time in Patent Office: 630 Days
• Field of Search: 52111, 52114, 52117, 52118, 52632, 5265105, 52116
• CPC Class Codes: B66F 3/24 fluid-pressure operated water-pressure machines F03B; hydraulic gearings F16H; cylinders, pistons F16J; fluid-pressure servomotors F15B
• CPC Class Codes: B66F 3/28 telescopic
• CPC Class Codes: B66F 7/0633 Mechanical arrangements not covered by the following subgroups
• CPC Class Codes: B66F 7/08 hydraulically or pneumatically operated
• 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

Abstract

A side saddle slingshot drilling rig includes a left and right substructure including a left and right lower box. The side saddle slingshot drilling rig includes a drill rig floor mechanically and pivotably coupled to the left and right lower boxes such that it is pivotably movable from a lowered position to a raised position. The drill rig floor includes a V-door. The V-door is positioned on the V-door side of the drill rig floor. The V-door side of the drill rig floor is oriented to face the right substructure. A mast coupled to the drill rig floor may include an open side, defining a mast V-door side. The mast V-door side may be oriented to face the right substructure. The mast may pivot into its raised position or may be a bootstrap mast.

Claims

1. A drilling rig comprising:

a right substructure and a left substructure, the substructures positioned generally parallel and spaced apart from each other;

the right substructure comprises a right lower box and a first strut, the first strut pivotably coupled to a drill rig floor and pivotably coupled to the right lower box, the drill rig floor including a V-door, the side of the drill rig floor including the V-door defining the V-door side of the drill rig floor, the V-door oriented to face perpendicular to the right substructure;

the left substructure comprises a left lower box and a second strut, the second strut pivotably coupled to the drill rig floor and pivotably coupled to the left lower box;

a cylinder sub box, the cylinder sub box including one or more mast hydraulic cylinders, the cylinder sub box coupled to the left substructure at a side of the left substructure or to the right substructure at a side of the right substructure; and

a mast, the mast including an open side defining a mast V-door side, the open side oriented to face perpendicular to the right substructure, the mast pivotably coupled to the drill rig floor by one or more pivot points and one or more lower mast attachment points, the mast being pivotable in a direction perpendicular to the V-door side of the drill rig floor.

2. The drilling rig of claim 1, wherein the struts form a bar linkage between the lower boxes and the drill rig floor.

3. The drilling rig of claim 2, wherein the struts are adapted to allow motion of the drill rig floor relative to the lower boxes while maintaining the drill rig floor parallel to the lower boxes.

4. The drilling rig of claim 1, wherein the V-door side of the drilling rig floor is parallel to the right substructure.

5. The drilling rig of claim 1, wherein the right and left lower boxes further comprise one or more hydraulic cylinders, the hydraulic cylinders mechanically coupled to one or more corresponding drill rig floor lifting points.

6. The drilling rig of claim 5, wherein the mast includes one or more braces positioned to brace the mast at the mast attachment points of the mast.

7. The drilling rig of claim 1, wherein the mast hydraulic cylinders are mechanically coupled to one or more corresponding upper mast attachment points of the mast.

8. The drilling rig of claim 7, wherein the mast is pivotable in a direction away from the V-door side of the drill rig floor when lowered, and wherein the cylinder sub box is mechanically coupled to the left lower box.

9. The drilling rig of claim 7, wherein the mast is pivotable in a direction toward the V-door side of the drill rig floor when lowered, and wherein the cylinder sub box is mechanically coupled to the right lower box.

10. The drilling rig of claim 1, wherein the mast comprises one or more mast subcomponents, the mast subcomponents mechanically coupled together and to the drill rig floor.

11. The drilling rig of claim 10, wherein the mast comprises a lower mast subcomponent, the lower mast subcomponent mechanically coupled to the drill rig floor.

12. The drilling rig of claim 1, wherein the mast V-door side is oriented to face vertically upward when the mast is in a lowered position.

13. A drilling rig comprising:

a right substructure and a left substructure, the substructures positioned generally parallel and spaced apart from each other;

the right substructure comprises a right lower box and a first strut, the first strut pivotably coupled to a drill rig floor and pivotably coupled to the right lower box, the drill rig floor including a V-door, the side of the drill rig floor including the V-door defining the V-door side of the drill rig floor, the V-door oriented to face perpendicular to the right substructure;

the left substructure comprises a left lower box and a second strut, the second strut pivotably coupled to the drill rig floor and pivotably coupled to the left lower box;

a cylinder sub box, the cylinder sub box including one or more mast hydraulic cylinders, the cylinder sub box coupled to the left substructure at a side of the left substructure or to the right substructure at a side of the right substructure; and

a mast, the mast including an open side defining a mast V-door side, the open side oriented to face perpendicular to the right substructure, the mast pivotably coupled to the drill rig floor by one or more pivot points and one or more lower mast attachment points, the mast being pivotable in a direction parallel to the V-door side of the drill rig floor such that the open side of the mast is oriented to face horizontally when the mast is in a lowered position.

14. The drilling rig of claim 13, wherein the struts form a bar linkage between the lower boxes and the drill rig floor.

15. The drilling rig of claim 14, wherein the struts are adapted to allow motion of the drill rig floor relative to the lower boxes while maintaining the drill rig floor parallel to the lower boxes.

16. The drilling rig of claim 13, wherein the V-door side of the drilling rig floor is parallel to the right substructure.

17. The drilling rig of claim 13, wherein the right and left lower boxes further comprise one or more hydraulic cylinders, the hydraulic cylinders mechanically coupled to one or more corresponding drill rig floor lifting points.

18. The drilling rig of claim 17, wherein the mast includes one or more braces positioned to brace the mast at the mast attachment points of the mast.

19. The drilling rig of claim 13, wherein the mast hydraulic cylinders are mechanically coupled to one or more corresponding upper mast attachment points of the mast.

20. The drill rig of claim 17, wherein the hydraulic cylinders are adapted to decouple from the drill rig floor lifting points.

21. The drilling rig of claim 13, wherein the mast comprises one or more mast subcomponents, the mast subcomponents mechanically coupled together and to the drill rig floor.

22. The drilling rig of claim 21, wherein the mast comprises a lower mast subcomponent, the lower mast subcomponent mechanically coupled to the drill rig floor.