Automatic method for installing mobile drilling rig at a drilling site

• US 7,306,055 B2
• Filed: 03/01/2005
• Issued: 12/11/2007
• Est. Priority Date: 03/02/2004
• Status: Expired due to Fees

• Current Assignee: Barnes R. Michael
• Original Assignee: Barnes R. Michael
• Inventors: Barnes, R. Michael
• Primary Examiner(s): Bagnell, David
• Assistant Examiner(s): Bomar, Shane
• Application Number:
  US11/069,783
• Publication Number:
  US 20050193645A1
• Time in Patent Office: 1,015 Days
• Field of Search: 166/379, 175/122, 175/57, 175/102, 175/203, 175/219, 175/85, 521/43, 526/510.5, 527/451.7, 521/18, 521/19, 521/20
• US Class Current: 175/57
• 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 for installing a mobile drilling rig at a drilling site entails transporting the mobile drilling rig to the drilling site, wherein the mobile drilling rig is made three sections: two substructures and a mast section. The substructures are placed parallel to one another at the drilling site. The mast section is connected to the mast starting sections located on each substructure. Raising cylinders on the substructures engage the mast and raise the mast into a substantially vertical orientation, wherein the mast is locked in place. The raising cylinders are retraced and then re-extended into a drillfloor raising position. The method ends by extending the raising cylinders to raise the driller'"'"'s floor side box and the off-driller'"'"'s floor side box into an operating elevation.

Claims

1. A method for installing a mobile drilling rig at a drilling site comprising the steps of:

a. transporting the mobile drilling rig to the drilling site, wherein the mobile drilling rig comprises;

i. a mast;

ii. a driller'"'"'s side substructure comprising a first mast starting section;

a driller'"'"'s floor side box connected to the first mast starting section;

a first driller'"'"'s elevating leg;

a second driller'"'"'s elevating leg, wherein the first and second driller'"'"'s elevating legs engage the driller'"'"'s floor side box;

a driller'"'"'s subbase side box engaging the first and second driller'"'"'s elevating legs; and

a driller'"'"'s raising cylinder engaging the driller'"'"'s subbase side box;

iii. an off-driller'"'"'s side substructure comprising a second mast starting section;

an off- driller'"'"'s floor side box connected to the second mast starting section;

a first off-driller'"'"'s elevating leg;

a second off-driller'"'"'s elevating leg, wherein the first and second driller'"'"'s elevating legs engage the off driller'"'"'s floor side box;

an off-driller'"'"'s subbase side box engaging the first and second off-driller'"'"'s elevating legs; and

an off-driller'"'"'s raising cylinder engaging the off-driller'"'"'s subbase side box;

b. placing the driller'"'"'s side substructure and the off-driller'"'"'s side substructure parallel to one another at the drilling site;

c. connecting the mast to the first and second mast starting sections;

d. extending the driller'"'"'s and off-driller'"'"'s raising cylinders into a mast raising position to raise the mast into a substantially vertical orientation and locking the mast in the substantially vertical orientation;

e. retracting the raising cylinders from the mast raising position and re-extending the raising cylinders into a drill floor raising position; and

f. extending the raising cylinders to raise the driller'"'"'s floor side box and the off-driller'"'"'s floor side box into an operating elevation.

2. The method of claim 1, wherein the step of connecting the mast to the first and second mast starting section comprises the steps of

a. moving a truck carrying the mast into position, wherein the mast is located on and partially or wholly supported by a dolly;

b. extending a dolly bolster located on the dolly, wherein extending the dolly bolster raises the mast above the first and second mast starting sections.

3. The method of claim 2, further comprising the step of extending a mast stand from the mast to the site in order to support the weight of the mast until the mast is raised.

4. The method of claim 1, further comprising the step of installing drawworks before the step of extending the driller'"'"'s and off-driller'"'"'s raising cylinders to raise the mast into a substantially vertical orientation.

5. The method of claim 4, wherein the mobile drilling rig further comprises a drawworks and the mast comprises a crown and a hoisting system, wherein the drawworks is connected to the crown by a fastline and assists in raising the mast into the substantially vertical orientation.

6. The method of claim 1, wherein the mobile drilling rig further comprises a driller'"'"'s snubbing cylinder disposed on the driller'"'"'s floor side box and an off-driller'"'"'s snubbing cylinder disposed on the off-driller'"'"'s floor side box, wherein the snubbing cylinders are adapted to control the mast in the final stages of raising.

7. The method of claim 1, wherein the step of locking the mast in the vertical orientation comprises locking the mast into a first rear mast shoe located on the driller'"'"'s floor side box and a second rear mast shoe located on the off-driller'"'"'s floor side box.

8. The method of claim 1, further comprising a driller'"'"'s intermediate cylinder disposed on the driller'"'"'s subbase side box and an off-driller'"'"'s intermediate cylinder disposed on the off-driller'"'"'s subbase side box, wherein the intermediate cylinders are adapted to initiate raising the respective floor side box.

9. The method of claim 1, wherein the driller'"'"'s side substructure further comprises a first brace connected to the driller'"'"'s elevating legs, wherein the off-driller'"'"'s side substructure further comprises a second brace connected to the off-driller'"'"'s elevating legs.

10. The method of claim 9, wherein the first brace and the second brace are telescoping braces.

11. The method of claim 1, wherein the mast is a telescoping mast that comprises an upper section adapted to nest within and a lower section.

12. The method of claim 11, further comprising the step of extending the telescoping mast using a telescoping cylinder or a draw works with a wire line.

13. The method of claim 1, wherein the mast further comprises a racking board and a belly board folded during the step of transporting, and wherein the method further comprises the step of unfolding the racking board and the belly board.

14. The method of claim 13, wherein the racking board is adapted to be in a first contracted position for transport and in a second position for operation.

15. The method of claim 1, further comprising the step of installing a central drill floor between the driller'"'"'s floor side box and the off-driller'"'"'s floor side box.

16. The method of claim 1, further comprising the step of installing a central subbase between the driller'"'"'s subbase side box and the off-driller'"'"'s subbase side box.

17. The method of claim 1, wherein the raising cylinders are attached to the mast starting sections using a connection allowing for a push only engagement.

18. A method for installing a mobile drilling rig at a drilling site comprising the steps of:

a. transporting the mobile drilling rig to the drilling site, wherein the mobile drilling rig comprises;

i. a mast;

ii. a driller'"'"'s side substructure comprising a first mast starting section;

a driller'"'"'s floor side box connected to the first mast starting section;

a first driller'"'"'s elevating leg;

a second driller'"'"'s elevating leg, wherein the first and second driller'"'"'s elevating legs engage the driller'"'"'s floor side box;

a driller'"'"'s subbase side box engaging the first and second driller'"'"'s elevating legs; and

a driller'"'"'s raising cylinder engaging the driller'"'"'s subbase side box;

iii. an off-driller'"'"'s side substructure comprising a second mast starting section;

an off-driller'"'"'s floor side box connected to the second mast starting section;

a first off-driller'"'"'s elevating leg;

a second off-driller'"'"'s elevating leg, wherein the first and second driller'"'"'s elevating legs engage the off-driller'"'"'s floor side box;

an off-driller'"'"'s subbase side box engaging the first and second off-driller'"'"'s elevating legs; and

an off-driller'"'"'s raising cylinder engaging the off-driller'"'"'s subbase side box;

b. placing the driller'"'"'s side substructure and the off-driller'"'"'s side substructure parallel to one another at the drilling site;

c. connecting the mast to the first and second mast starting sections;

d. extending the driller'"'"'s and off-driller'"'"'s raising cylinders into a mast raising position to raise the mast into a substantially vertical orientation and locking the mast in the substantially vertical orientation; and

e. continuing to extend the raising cylinders to raise the driller'"'"'s floor side box and the off driller'"'"'s floor side box into an operating elevation.