Side-saddle cantilever mast

Patent metadata

Field	Value
Publication number	US-10704337-B2
Application number	US-201715806088-A
Country	US
Kind code	B2
Filing date	Nov 7, 2017
Priority date	Nov 7, 2016
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A side saddle slingshot drilling rig includes a right substructure and a left substructure, the substructures positioned generally parallel and spaced apart from each other. The right substructure includes a right lower box and a first strut, the first strut pivotably coupled to the drill rig floor and pivotably coupled to the right lower box. The left substructure includes 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. The side saddle slingshot drilling rig also includes a drill rig floor, the drill rig floor including a V-door. The side of the drill rig floor has the V-door defining the V-door side of the drill rig floor, the V-door side of the drill rig floor parallel to the right substructure. The side saddle slingshot drilling rig further includes a mast, the mast including an open side defining a mast V-door side. The open side is oriented to face perpendicular to the right substructure. The mast is pivotably coupled to the drill rig floor by one or more mast 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 or the mast being pivotable in a direction perpendicular to V-door side of the drill rig floor. The mast includes two or more subunits, wherein the two or more subunits are pinned together.

First claim

The invention claimed is:

1. A side saddle slingshot 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 the drill rig floor and pivotably coupled to the right lower box;
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 drill rig floor, 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 side of the drill rig floor parallel to 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 mast 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 or the mast being pivotable in a direction perpendicular to V-door side of the drill rig floor, the mast comprised of two or more subunits including:
an upper mast subunit, the upper mast subunit including an upper mast section, a travelling block positioned within the upper mast section, the upper mast section having a V-door side, the upper mast subunit adapted to be transported such that the V-door side of the upper mast section is perpendicular to the ground; and
a lower mast subunit, the lower mast subunit including a lower mast section, a top drive positioned within the lower mast section, the lower mast section having a V-door side, the lower mast-subunit adapted to be transported such that the V-door side of the lower mast section is perpendicular to the ground.

2. The side saddle slingshot drilling rig of claim 1 , wherein the two or more subunits comprise a lower mast subunit, a middle mast subunit, and an upper mast subunit.

3. The side saddle slingshot drilling rig of claim 1 further comprising a catwalk assembly, the catwalk assembly including a catwalk and a slide, the catwalk mechanically connected to V-door side of the drill rig floor.

4. The side saddle slingshot drilling rig of claim 3 , wherein the struts form a bar linkage between the lower boxes and the drill rig floor.

5. The side saddle slingshot drilling rig of claim 4 , 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.

6. The side saddle slingshot drilling rig of claim 3 , wherein the V-door side of the drill rig floor is parallel to the right substructure.

7. The side saddle slingshot drilling rig of claim 3 , wherein the right and left lower boxes further comprise one or more hydraulic cylinders, the hydraulic cylinders mechanically coupled to one or more corresponding upper mast attachment points of the mast.

8. The side saddle slingshot drilling rig of claim 7 , wherein the mast includes one or more braces positioned to brace the mast at the mast attachment points of the mast.

9. The side saddle slingshot drilling rig of claim 8 , wherein the mast is pivotable in a direction away from the V-door side of the drill rig floor when lowered.

10. The side saddle slingshot drilling rig of claim 8 , wherein the mast is pivotable in a direction toward the V-door side of the drill rig floor when lowered.

11. The side saddle slingshot drilling rig of claim 1 further comprising a choke house positioned on the drill rig floor or mechanically coupled to the right or left substructure.

12. The side saddle slingshot drilling rig of claim 11 , wherein the choke house includes a choke manifold.

13. The side saddle slingshot drilling rig of claim 1 further comprising drill line spooler, the drilling rig spooler attached to lower box, the drill line spooler including a spool positioned on a spool bogie.

14. The side saddle slingshot drilling rig of claim 1 further comprising walkers, the walkers positioned within the lower boxes.

15. The side saddle slingshot drilling rig of claim 1 further comprising a mud gas separator, the mud gas separator mechanically coupled to the right or left substructure.

16. The side saddle slingshot drilling rig of claim 1 further comprising a stair tower, the stair tower mechanically coupled to the right substructure or left substructure.

17. The side saddle slingshot drilling rig of claim 1 further comprising a standpipe manifold, the standpipe manifold mechanically connected to the right substructure of left sub structure.

18. The side saddle slingshot drilling rig of claim 1 further comprising a drawworks, the drawworks mechanically connected to the left substructure or right substructure.

19. The side saddle slingshot drilling rig of claim 1 further comprising a hydraulic power unit, the hydraulic power unit mechanically connected to the left substructure or right sub structure.

20. The side saddle slingshot drilling rig of claim 1 further comprising an accumulator, the accumulator mechanically connected to the left substructure or right sub structure.

21. The side saddle slingshot drilling rig of claim 1 further comprising a drillers cabin, the drillers cabin mechanically connected to the left or right substructure.

Assignees

• Nabors Drilling Tech Usa Inc

Inventors

• Gupta Ashish
• Hause Ryan
• Reddy Padira

Classifications

• E21B15/00 Primary

  Supports for the drilling machine, e.g. derricks or masts · CPC title

• E04H12/345

  Arrangements for tilting up whole structures or sections thereof (E04H12/347 takes precedence) · CPC title

• E04H12/34 Primary

  Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like · CPC title

• E21B19/084

  with flexible drawing means, e.g. cables · CPC title

• E21B7/02

  Drilling rigs characterised by means for land transport {with their own drive}, e.g. skid mounting or wheel mounting · CPC title