Fast moving drilling rig

• US 7,765,749 B2
• Filed: 04/20/2004
• Issued: 08/03/2010
• Est. Priority Date: 04/25/2003
• Status: Active Grant

• Current Assignee: National Oilwell LP (National Oilwell Varco Incorporated)
• Original Assignee: National Oilwell LP (National Oilwell Varco Incorporated)
• Inventors: Palidis, Anastasios
• Primary Examiner(s): Chilcot, Jr.; Richard E
• Assistant Examiner(s): Wendell; Mark R
• Application Number:
  US10/827,956
• Publication Number:
  US 20040211598A1
• Time in Patent Office: 2,296 Days
• Field of Search: 521/12, 521/19, 52/7, 175/162, 173/186, 173/28, 173/184, 254/90, 254/91, 254/93.L, 82/625
• US Class Current: 52/112
• CPC Class Codes: E21B 15/00 Supports for the drilling machine, e.g. derricks or masts
• 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 method and apparatus for transporting and assembling a drilling rig is disclosed. The drilling rig of a preferred embodiment of the present invention utilizes specialized positioning pads integral to the side boxes of the drilling rig to facilitate the connection of the center drill floor of the drilling rig to the side boxes of the rig. A preferred embodiment of the present invention may also utilize a specialized positioning dolly and an adjustable fifth-wheel truck connection for transporting the mast to the drill site, assembling the mast sections together, and positioning the mast for connection to the drill floor of the rig. The result is a unique drilling rig design and sequence for assembly that significantly reduces the time required to transport the rig from location to location and to assemble the rig at the drill site.

Claims

1. A transportable drilling rig comprising:

a first side box comprising one or more positioning pads and one or more leg frames, wherein each positioning pad comprises a plurality of positioning cylinders capable of moving the side box in the horizontal and vertical directions;

a second side box comprising one or more positioning pads and one or more leg frames, wherein each positioning pad comprises a plurality of positioning cylinders capable of moving the side box in the horizontal and vertical directions;

a drill floor connected to the first and second side boxes; and

a drilling rig mast connected to the drill floor.

2. The transportable drilling rig of claim 1 wherein the first side box and the second side box further comprise one or more telescoping diagonal braces, the one or more telescoping diagonal braces being designed to secure the drill floor in an elevated position.

3. The transportable drilling rig of claim 2 wherein the one or more telescoping diagonal braces comprise concentric cylinders and wherein the one or more telescoping diagonal braces are in an extended position prior to the drill floor being raised to the elevated position such that the concentric cylinders telescope inwardly as the drill floor is raised.

4. The transportable drilling rig of claim 3 further comprising one or more drill floor raising cylinders, wherein the one or more drill floor raising cylinders are hydraulically actuated for raising the drill floor to the elevated position.

5. The transportable drilling rig of claim 4 further comprising one or more mast raising cylinders, wherein the one or more mast raising cylinders are hydraulically actuated for raising the drilling rig mast.

6. The transportable drilling rig of claim 1 wherein the first side box and the second side box each have a fifth-wheel connection for connection to a truck and wherein the first side box and the second side box are each connected to a wheeled transporter for transporting the first side box and the second side box by truck.

7. The transportable drilling rig of claim 1 wherein the plurality of positioning cylinders are hydraulic.

8. A transportable drilling rig comprising:

a first side box comprising a base side box, a drill floor side box, one or more telescoping diagonal braces, and one or more leg frames, wherein the one or more leg frames support the drill floor side box in an elevated position;

a second side box comprising a base side box, a drill floor side box, one or more telescoping diagonal braces, and one or more leg frames, wherein the one or more leg frames support the drill floor side box in the elevated position;

a drill floor comprising a center drill floor section connected to the drill floor side boxes of the first side box and the second side box;

one or more drill floor raising cylinders for raising the drill floor to the elevated position;

wherein the one or more telescoping diagonal braces of the first and second side boxes comprise concentric cylinders and wherein the one or more telescoping diagonal braces are in an extended position prior to the drill floor being raised to the elevated position such that the concentric cylinders telescope inwardly as the drill floor is raised and the one or more telescoping diagonal braces secure the drill floor in the elevated position;

a drilling rig mast connected to the drill floor; and

one or more mast raising cylinders connected to the drilling rig mast.

9. The transportable drilling rig of claim 8 wherein the first and second side boxes further comprise one or more positioning pads, each positioning pad having a plurality of positioning cylinders capable of moving the first and second side boxes in the horizontal and vertical directions.

10. The transportable drilling rig of claim 9 wherein the plurality of positioning cylinders are operated by a portable hydraulic power unit and wherein the plurality of positioning cylinders are used to align connection points on the drill floor side boxes with connection points on the center drill floor section.

11. The transportable drilling rig of claim 8 wherein the one or more drill floor raising cylinders and the one or more mast raising cylinders are hydraulically actuated.

12. The transportable drilling rig of claim 8 wherein the first side box and the second side box each have a fifth-wheel connection for connection to a truck and wherein the first side box and the second side box are each connected to a wheeled transporter for transporting the first side box and the second side box by truck.

13. The transportable drilling rig of claim 8 wherein the drilling rig mast comprising comprises a bottom section, a lower section, and a top section.

14. The transportable drilling rig of claim 13 wherein:

the top section of the drilling rig mast is connected to a truck by a fifth-wheel connection, the fifth-wheel connection having a plurality of positioning cylinders capable of moving the top section of the drilling rig mast in the horizontal and vertical directions;

the top section of the drilling rig mast is also connected to a positioning dolly for transport to a drill site, the positioning dolly having a plurality of positioning cylinders capable of moving the top section of the drilling rig mast in the horizontal and vertical directions; and

the lower section of the drilling rig mast is transportable by a wheeled trailer.

15. A method of assembling a drilling rig at a drill site comprising:

positioning a first side box, the first side box comprising one or more positioning pads connected thereto;

positioning a center drill floor section;

aligning a plurality of connection points on the center drill floor section with a plurality of connection points on the first side box through operation of the positioning pads connected to the first side box;

connecting the center drill floor section to the first side box;

positioning a second side box, the second side box comprising one or more positioning pads connected thereto;

aligning a plurality of connection points on the center drill floor section with a plurality of connection points on the second side box through operation of the positioning pads connected to the second side box;

connecting the center drill floor section to the second side box;

connecting a drilling rig mast to the center drill floor section, the drilling rig mast comprising one or more mast sections;

raising the drilling rig mast; and

raising a drill floor to an elevated position, the drill floor comprising the drill floor side boxes connected to the center drill floor section.

16. The method of claim 15 further comprising utilizing a plurality of positioning cylinders integral to the positioning pads of the first and second side boxes to move the first and second side boxes in the horizontal and vertical directions for alignment of the first and second side boxes with the center drill floor section for connection thereto.

17. The method of claim 16 further comprising connecting the center drill floor section to the first and second side boxes by pinning a plurality of mating lugs attached to the first and second side boxes together with a plurality of mating lugs attached to the center drill floor section.

18. The method of claim 15 further comprising connecting two or more mast sections of the drilling rig mast together to form the drilling rig mast prior to connecting the drilling rig mast to the center drill floor section.

19. The method of claim 18 wherein the drilling rig mast is raised by one or more mast raising cylinders.

20. The method of claim 19 further comprising supporting the drill floor in the elevated position with a plurality of leg frames.

21. The method of claim 20 further comprising securing the drill floor in the elevated position with a telescoping diagonal brace.

22. The method of claim 21 whereby the one or more telescoping diagonal braces telescope inwardly to a retracted position as the drill floor is raised to the elevated position.

23. The method of claim 22 further comprising retaining the one or more telescoping diagonal braces in the retracted position by pinning the one or more telescoping diagonal braces to the lower portion of the first and second side boxes.

24. A method of assembling a drilling rig at a drill site comprising:

positioning a first side box, the first side box comprising a base side box, a drill floor side box, one or more telescoping diagonal braces, and one or more leg frames;

positioning a center drill floor section;

connecting the center drill floor section to the first side box;

positioning a second side box, the second side box comprising a base side box, a drill floor side box, one or more telescoping diagonal braces, and one or more leg frames;

connecting the center drill floor section to the second side box;

connecting a drilling rig mast to the center drill floor section, the drilling rig mast comprising one or more mast sections;

raising the drilling rig mast;

raising a drill floor to an elevated position, the drill floor comprising the drill floor side boxes connected to the center drill floor section;

supporting the drill floor in the elevated position with the one or more leg frames of the first and second side boxes; and

securing the drill floor in the elevated position with the one or more telescoping diagonal braces of the first and second side boxes, whereby the one or more telescoping diagonal braces telescope inwardly to a retracted position as the drill floor is raised to the elevated position.

25. A method as defined in claim 24, wherein:

a section of the drilling rig mast is transported to the drill site with a top drive installed prior to transport to the drill site;

a section of the drilling rig mast is transported to the drill site with a drill line spooler installed prior to transport to the drill site, the drill line spooler having drill line is spooled around the drill line spooler prior to transport to the drill site;

a section of the drilling rig mast is transported to the drill site with a traveling block installed prior to transport to the drill site; and

the top section of the drilling rig mast is transported to the drill site with a crown block installed prior to transport to the drill site.

26. A method as defined in claim 24, wherein a top or lower section of the drilling rig mast is connected to a truck by a fifth-wheel connection for transport to the drill site, the fifth-wheel connection having a plurality of positioning cylinders capable of moving the top or lower section of the drilling rig mast in the horizontal and vertical directions.