Self-propelled drilling module

• US 5,248,005 A
• Filed: 02/13/1991
• Issued: 09/28/1993
• Est. Priority Date: 02/13/1991
• Status: Expired due to Fees

• Current Assignee: Nabors Industries Incorporated (Nabors Industries Limited)
• Original Assignee: Nabors Industries Incorporated (Nabors Industries Limited)
• Inventors: Mochizuki, David A.
• Primary Examiner(s): Neuder, William P.
• Application Number:
  US07/655,562
• Time in Patent Office: 958 Days
• Field of Search: 175/52, 175/85, 175/219, 175/162, 175/202, 175/203, 166/901
• US Class Current: 175/85
• CPC Class Codes: E21B 41/0021 Safety devices, e.g. for preventing small objects from falling into the borehole
• CPC Class Codes: E21B 7/023 the mast being foldable or telescopically retractable
• CPC Class Codes: Y10S 166/901 Wells in frozen terrain

Abstract

There is provided a portable drilling module that is preferably mounted onto a self-propelled carrier. Winterizing panels enclose equipment mounted aboard the module and provide an environmentally sheltered space for workmen. In particular, the panels fully surround a rear portion of the module that is adapted to be positioned over a well, and allow a full load of pipe to be temporarily stored within this portion of the module. Moreover, a number of the panels may be removed to reduce the weight of the module so that it can be transported and used for workover operations in warmer months.

Claims

1. A drilling apparatus comprising:

a self-propelled carrier;

a derrick disposed on a first portion of said carrier, said derrick adapted to be moveable from a substantially horizontal transportation position to an upright working position over a well, and wherein said derrick is adapted to control insertion and retraction of at least 8000 feet of pipe sections into said well; and

a shelter disposed on said carrier, said shelter adapted to permit the installation of said derrick upwardly through said shelter, and wherein said shelter extends from said well to a preselected height on said derrick and substantially surrounds a portion of said derrick and is adapted to temporarily store said pipe sections.

2. The apparatus, as set forth in claim 1, wherein said shelter comprises a hinged portion, said hinged portion being adapted to open to facilitate pivoting said derrick upright and to close so that said shelter substantially surrounds said upright derrick.

3. The apparatus, as set forth in claim 1, wherein a second portion of said carrier carries a drawworks and an engine adapted for coupling to said drawworks.

4. The apparatus, as set forth in claim 3, wherein said shelter substantially encloses a second portion of said carrier and facilitates movement of workmen between said second portion and said enclosed portion of said derrick without having to leave said shelter.

5. The apparatus, as set forth in claim 1, wherein said shelter is comprised of a plurality of winterizing panels.

6. The apparatus, as set forth in claim 1, wherein a portion of said panels are removable.

7. A drilling apparatus, comprising:

a self-propelled carrier;

a derrick disposed on a first portion of said carrier, said derrick adapted to be positioned over a well and to control insertion and retraction of at least 8000 feet of pipe sections into said well;

a shelter disposed on said carrier, said shelter extending from said well to a preselected height on said derrick, substantially surrounding a portion of said derrick, and being adapted to temporarily store said pipe sections; and

a plurality of hydraulically operated feet disposed on said carrier, said feet being extended into contact with the ground when positioned in a working position and being retracted when positioned in a transportation position.

8. The apparatus, as set forth in claim 7, wherein said feet fully support said apparatus when positioned in said working position.

9. The apparatus, as set forth in claim 8, wherein a selected portion of said feet are located beneath said derrick and encompassed by said shelter in both said working and said transportation positions.

10. The apparatus, as set forth in claim 9, wherein one of said selected portion of said feet has a notch therein, said notch being adapted to partially surround said well when said feet are in said working position.

11. The apparatus, as set forth in claim 9, wherein said selected portion of said feet form a generally U-shaped footprint, said generally U-shaped footprint being configured so that said selected portion of said feet avoid contact with equipment protruding from said well during positioning of said derrick over said well.

12. The apparatus, as set forth in claim 11, wherein said selected portion of said feet comprise:

a U-shaped foot having a base portion and two outwardly extending portions and being adapted to partially surround said well when said U-shaped foot is in said working position; and

two feet being displaced a preselected distance from said outwardly extending portions of said U-shaped foot, said two feet being spaced apart from one another.

13. A drilling apparatus comprising:

a wheeled carrier;

a drill floor coupled to said carrier;

a derrick disposed on said carrier and adapted to be positioned over a well adjacent said drill floor;

a shelter disposed on said carrier, said shelter substantially enclosing said carrier and said drill floor; and

a plurality of hydraulically operated feet disposed on said carrier, said feet being extendable into contact with the ground for working and being retractable for transportation, a selected portion of said feet being located beneath said drill floor and being encompassed by said shelter in both said extended and retracted positions.

14. The apparatus, as set forth in claim 13, wherein said wheeled carrier is self-propelled.

15. The apparatus, as set forth in claim 13, wherein said derrick is adapted for pivotal motion between a transportation position, wherein said derrick rests horizontally along said carrier, and a working position, wherein said derrick stands vertically on said carrier.

16. The apparatus, as set forth in claim 13, wherein said shelter facilitates movement of workmen between said carrier and said drill floor without having to leave said shelter.

17. The apparatus as set forth in claim 16, wherein said feet fully support said apparatus when positioned in said extended position.

18. The apparatus, as set forth in claim 13, wherein one of said selected portion of said feet has a notch therein, said notch being adapted to partially surround said well when said feet are in said extended position.

19. The apparatus, as set forth in claim 13, wherein said selected portion of said feet form a generally U-shaped footprint, said generally U-shaped footprint being configured so that said selected portion of said feet avoid contact with equipment protruding from said well during positioning of said derrick over said well.

21. The apparatus, as set forth in claim 13, wherein said shelter is comprised of a plurality of winterizing panels.

22. The apparatus, as set forth in claim 21, wherein a portion of said panels are removable.

20. The apparatus, as set forth in claim 20, wherein said selected portion of said feet comprise:

a U-shaped foot having a base portion and two outwardly extending portions and being adapted to partially surround said well when said U-shaped foot is in said working position; and

two feet being displaced a preselected distance from said outwardly extending portions of said U-shaped foot, said two feet being spaced apart from one another.