Post and non-elongated substructure drilling rig

Abstract

A land-based drilling rig includes a drill rig floor, the drill rig floor including a V-door, a side of the drill rig floor having the V-door defining a V-door side of the drill rig floor and an opposite V-door side of the drill rig floor opposite the V-door side of the drill rig floor. The land-based drilling rig also includes a mast, the mast mechanically coupled to the drill rig floor. Further, the land-based drilling rig includes at least four support bases, each support base coupled to the drill rig floor by a telescoping support arm, the support base and telescoping arm forming a support, wherein the support bases are square or cylindrical.

Description

FIELD OF THE DISCLOSURE

The present disclosure relates generally to drilling rigs, and specifically to telescoping rig structures for land drilling in the petroleum exploration and production industry.

BACKGROUND OF THE DISCLOSURE

Land-based drilling rigs may be configured to be moved from location to location to drill multiple wells within the same area known as a wellsite. In certain situations, movement across an already drilled well for which there is a well-head in place may be desirable. Further, mast placement on land-drilling rigs may have an effect on drilling activity. For example, depending on mast placement on the drilling rig, an existing well-head may interfere with the location of land-situated equipment such as, for instance, existing wellheads, and may also interfere with raising and lowering of equipment for operations.

SUMMARY

The present disclosure provides for a land-based drill rig. The land-based drilling rig includes a drill rig floor, the drill rig floor including a V-door, a side of the drill rig floor having the V-door defining a V-door side of the drill rig floor and an opposite V-door side of the drill rig floor opposite the V-door side of the drill rig floor. The land-based drilling rig also includes a mast, the mast mechanically coupled to the drill rig floor. Further, the land-based drilling rig includes at least four support bases, each support base coupled to the drill rig floor by a telescoping support arm, the support base and telescoping arm forming a support, wherein the support bases are square or cylindrical.

The present disclosure provides for a method. The method includes supplying a land-based drilling rig. The land-based drilling rig includes a drill rig floor, the drill rig floor including a V-door, a side of the drill rig floor having the V-door defining a V-door side of the drill rig floor and an opposite V-door side of the drill rig floor opposite the V-door side of the drill rig floor, the drill rig floor in a lowered position. In addition, the land-based drilling rig includes a mast, the mast mechanically coupled to the drill rig floor, and at least four support bases, each support base coupled to the drill rig floor by a telescoping support arm, the support base and telescoping arm forming a support, wherein the support bases are square or cylindrical. In addition, the method includes positioning the land-based drilling rig within a wellsite, the wellsite having at least one row of wells, at least one well having a wellhead and raising the drill rig floor from the lowered position to a raised position using the telescoping support arms. In addition, the method includes moving the land-based drilling rig over the wellhead.

BRIEF DESCRIPTION OF THE DRAWINGS

The summary and the detailed description are further understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, there are shown in the drawings exemplary embodiments of said disclosure; however, the disclosure is not limited to the specific methods, compositions, and devices disclosed. In addition, the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a perspective view of a land-based drilling rig in a raised position consistent with at least one embodiment of the present disclosure.

FIG. 2 is a side view of a land-based drilling rig in a raised position consistent with at least one embodiment of the present disclosure.

FIG. 3 is a perspective view of a land-based drilling rig in a raised position consistent with at least one embodiment of the present disclosure.

FIG. 4 is a side elevation of a drilling rig consistent in a lowered position consistent with at least one embodiment of the present disclosure.

FIGS. 5A-5D are side schematic views of a walking land-based drilling rig consistent with at least one embodiment of the present disclosure.

FIG. 6 is a perspective view of a land-based drilling rig in a raised position consistent with at least one embodiment of the present disclosure.

DETAILED DESCRIPTION

The present disclosure may be understood more readily by reference to the following detailed description, taken in connection with the accompanying figures, which form a part of this disclosure. It is to be understood that this disclosure is not limited to the specific devices, methods, applications, conditions or parameters described and/or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only and is not intended to be limiting of the present disclosure. Also, as used in the specification, including the appended claims, the singular forms “a,” “an,” and “the” include the plural, and reference to a particular numerical value includes at least that particular value, unless the context clearly dictates otherwise. The term “plurality,” as used herein, means more than one.

FIGS. 1 and 6 are perspective views of different embodiments of land-based drilling rig 10 in a raised position. Land-based drilling rig 10 may include drill rig floor 30. Drill rig floor 30 is defined by V-door side 58, having V-door or opening 60 positioned thereon. V-door side 58 of drill rig floor 30 is adjacent slide 25 and catwalk 20. Drill rig floor 30 includes driller's side 152, on which driller's cabin 154 is positioned or cantilevered from.

Choke house 180 may be positioned on or cantilevered to drill rig floor 30. In certain embodiments, choke house 180 may be positioned on choke house skid 182. Choke house 180 may include choke manifold 184. A drawworks may be positioned on drill rig floor 30, a drawworks skid, or choke house skid 182.

In some embodiments, additional equipment including, for example and without limitation, mud tanks, trip tanks, process tanks, mud process equipment, compressors, variable frequency drives, or drill line spoolers, may be coupled to land-based drilling rig 10, such as positioned on or cantilevered from drill rig floor 30.

Drill rig floor 30 may be supported by a plurality of telescoping support arms 50. Each telescoping support arm 50 may be mechanically connected to a respective support base 62 forming support 65. In certain embodiments, support bases 62 may be square. In other embodiments, support bases 62 may be cylindrical.

As shown in the embodiment of FIG. 1, at least three supports 65 may be arranged along V-door side edge 70 forming V-door support row 66 and at least three supports 65 may be arranged opposite V-door side edge 80 of drill rig floor 30 forming opposite V-door support row 68. Thus, V-door side 58 is parallel to V-door support row 66 and opposite V-door support row 68.

In the embodiment shown in FIG. 6, land-based drilling rig 10 has only four supports 65. Each of the four supports 65 may be located at or near a corner of drill rig floor 30. In this embodiment, V-door 60 may be positioned between at least two of supports 65 on drill rig floor 30. As exemplified by FIG. 6, supports 65 are positioned such that distance A, A′ (wherein distance A is the distance between supports 65 positioned on V-door side 58 of land-based drilling rig 10 and A′ is the distance between supports 65 positioned on the driller's side or off-drillers side) between any supports 65 is sufficient to allow wellhead 130 to pass between supports 65 when land-based drilling rig 10 is moved within the wellsite. Distances A, A′ may be the same or different.

As shown in FIG. 3, each telescoping support arm 50 may include hydraulic cylinder 52 for raising and lowering drill rig floor 30 using telescoping support arm 50 from a lowered position, as shown in FIG. 4 to an upright position as shown in FIGS. 1-3.

With further attention to FIG. 1, mast 90 may be fixedly or pivotably coupled to drill rig floor 30. Mast 90 may include mast V-door side 92, which faces V-door side 58. Mast V-door side 92 is an open side of mast 90. Equipment positioned within mast 90 may include travelling block 94. Crown block 96 may be positioned on top of mast 90 and pipe rack 98 mechanically attached to mast 90.

Land-based drilling rig 10 is shown in FIG. 1 positioned within wellsite 100 having wells 110 arranged in row 120. Land-based drilling rig 10 may be moved, such as by walking or skidding to different wells 110 in row 120 without breaking down land-based drilling rig 10. V-door support row 66 and opposite V-door support row 68 are spaced apart such that, as shown in FIGS. 1-4, when traveling, wells 110 may pass between V-door support row 66 and opposite V-door support row 68. As shown in FIGS. 1-3, when in the raised position, drill rig floor 30 is positioned using telescoping support arms 50 such that wellhead 130 may pass thereunder.

In some embodiments, as depicted in the figures, land-based drilling rig 10 may include one or more hydraulic walkers 140. Hydraulic walkers 140 may, in some embodiments, be positioned within one or more support bases 62. In some embodiments, hydraulic walkers 140 may be hydraulically actuatable to move or walk land-based drilling rig 10 to a different location in the wellsite. In some embodiments, hydraulic walkers 140 may be operable to move or walk land-based drilling rig 10 in any direction.

A non-limiting embodiment of a hydraulic walker for use with land-based drilling rig 10 is shown in FIGS. 5A-5D. Hydraulic walkers 140 may include walking foot 105 and hydraulic lift assembly 107 as depicted in FIG. 5A. Walking foot 105 may be a pad or any other structure configured to support the weight of land-based drilling rig 10 and associated equipment during a walking operation as discussed herein below. Hydraulic lift assembly 107 may include one or more hydraulic cylinders 108 positioned to move hydraulic walker 140 between a retracted position, as depicted in FIG. 5A, and an extended position, as depicted in FIG. 5B. Hydraulic lift assembly 107 may be mechanically coupled to column 40 by mounting structure 111. Mounting structure 111 may include any mechanical fasteners, plates, or other adapters to couple between hydraulic lift assembly 107 and column 40. In some embodiments, mounting structure 111 may be an outrigger structure. In a walking operation, depicted in FIGS. 5A-5D, hydraulic walkers 140 may be positionable in a retracted position as shown in FIG. 5A. In the retracted position, column 40 may be in contact with the ground 115, allowing the weight of land-based drilling rig 10 to be supported by column 40. When hydraulic walker 140 is in the extended position, as depicted in FIG. 5B, walking foot 105 may support column 40 above ground 115.

Once hydraulic walker 140 is in the extended position, sliding actuator 109 may be actuated to move walking foot 105 laterally relative to hydraulic lift assembly 107 from a first position to a second position as depicted in FIG. 5C. In some embodiments, one or more bearing surfaces, linear bearings, ball bearings, or roller bearings may be positioned between walking foot 105 and hydraulic lift assembly 107 as understood in the art to, for example and without limitation, bear the weight of land-based drilling rig 10 and any equipment thereon during a walking operation. Sliding actuator 109 may include one or more hydraulic cylinders or other linear actuators 114 used to move walking foot 105 horizontally relative to drilling rig 10. For example, when walking foot 105 is in contact with ground 115 as depicted in FIG. 5B, the movement of walking foot 105 by sliding actuator 109 may cause land-based drilling rig 10 to move along ground 115 to a position as shown in FIG. 5C. Hydraulic lift assembly 107 may retract, lifting walking foot 105 from ground 115 and allowing land-based drilling rig 10 to contact the ground 115 as depicted in FIG. 5D. Sliding actuator 109 may be reactuated with walking foot 105 off ground 115 to cause walking foot 105 to be returned to its original position, resetting hydraulic walkers 140 to the first position as depicted in FIG. 5A.

One having ordinary skill in the art with the benefit of this disclosure will understand that the specific configurations depicted in the figures may be varied without deviating from the scope of this disclosure.

Those skilled in the art will appreciate that numerous changes and modifications can be made to the preferred embodiments of the present disclosure and that such changes and modifications can be made without departing from the spirit of said disclosure. It is, therefore, intended that the appended claims cover all such equivalent variations as fall within the true spirit and scope of said disclosure.

Claims

1. A land-based drilling rig comprising: a drill rig floor, the drill rig floor including a V-door, a side of the drill rig floor having the V-door defining a V-door side of the drill rig floor and an opposite V-door side of the drill rig floor opposite the V-door side of the drill rig floor;a mast, the mast mechanically coupled to the drill rig floor;at least four support bases, each support base coupled to the drill rig floor by a telescoping support arm, the support base and telescoping arm forming a support, wherein the support bases are polyhedrons having a square base or are cylindrical, wherein the weight of the land-based drilling rig is born by the at least four support bases when the land-based drilling rig is stationary; andat least one hydraulic walker, the at least one hydraulic walker positioned within a support base.

2. The land-based drilling rig of claim 1, wherein each telescoping support arm includes a hydraulic cylinder.

3. The land-based drilling rig of claim 2, wherein the telescoping support arm is adapted to raise the drill rig floor from a lowered position to a raised position.

4. The land-based drilling rig of claim 1, wherein the mast is pivotably or fixedly coupled to the drill rig floor.

5. The land-based drilling rig of claim 1, wherein the mast includes a V-door side, the V-door side of the mast facing the V-door side of the drill rig floor, wherein the V-door side of the mast is an open side.

6. The land-based drilling rig of claim 1, wherein the hydraulic walkers are hydraulically actuable to move or walk the drilling rig.

7. The land-based drilling rig of claim 6 wherein the hydraulic walker comprises: a walking foot;a hydraulic lift assembly including a hydraulic cylinder coupled to the walking foot; anda sliding actuator including one or more hydraulic cylinders coupled to the walking foot.

8. The land-based drilling rig of claim 7, wherein at least a portion of the hydraulic walkers is rotatable relative to the support base.

9. The land-based drilling rig of claim 1 further comprising a slide and catwalk adjacent the V-door side of the drill rig floor.

10. The land-based drilling rig of claim 1, wherein the support bases are arranged in a V-door support row and an opposite V-door support row, each row of support bases having at least three support bases, the V-door support row arranged along the V-door side of the drill rig floor and the opposite V-door support row arranged opposite the V-door side of the drill rig floor.

11. The land-based drilling rig of claim 1, wherein the V-door is positioned between at least two supports.

12. The land-based drilling rig of claim 11, wherein each of the supports is positioned at or near edges of the drill rig floor.

13. The land-based drilling rig of claim 11, wherein the distance between two adjacent supports is A and the distance between two other adjacent supports is A′, wherein A and A′ are greater than the diameter of a wellhead.

14. The land-based drilling rig of claim 1, further comprising one or more of drill line spooler, hydraulic power unit, compressor, variable frequency drive, mud process equipment, choke manifold, accumulator, mud gas separator, process tank, or trip tank positioned on or cantilevered from the drill rig floor.

15. The land-based drilling rig of claim 1 further comprising a driller's cabin, the driller's cabin positioned on or cantilevered from a driller's side of the drill rig floor.

16. The land-based drilling rig of claim 1 further comprising a choke manifold, the choke manifold positioned on an off-driller's side of the drill rig floor.

17. A method comprising: supplying a land-based drilling rig, the land-based drilling rig comprising: a drill rig floor, the drill rig floor including a V-door, a side of the drill rig floor having the V-door defining a V-door side of the drill rig floor and an opposite V-door side of the drill rig floor opposite the V-door side of the drill rig floor, the drill rig floor in a lowered position;a mast, the mast mechanically coupled to the drill rig floor;at least four support bases, each support base coupled to the drill rig floor by a telescoping support arm, the support base and telescoping arm forming a support, wherein the support bases are polyhedrons having a square base or are cylindrical, wherein the weight of the land-based drilling rig is born by the at least four support bases when the land-based drilling rig is stationary; andat least one hydraulic walker, the at least one walker positioned within a support base;positioning the land-based drilling rig within a wellsite, the wellsite having at least one row of wells, at least one well having a wellhead;raising the drill rig floor from the lowered position to a raised position using the telescoping support arms; andmoving the land-based drilling rig over the wellhead using the at least one hydraulic walker.

18. The method of claim 17, wherein the step of moving the land-based drilling rig comprises: actuating the at least one hydraulic walker; andwalking the land-based drilling rig.

19. The method of claim 18, wherein the hydraulic walker comprises: a walking foot;a hydraulic lift assembly including a hydraulic cylinder coupled to the walking foot; anda sliding actuator including one or more hydraulic cylinders coupled to the walking foot.

20. The method of claim 19, wherein the step of walking the land-based drilling rig further comprises: positioning the land-based drilling rig at a first position in a wellsite;extending the hydraulic lifts of the hydraulic walker;lifting the land-based drilling rig off the ground;actuating the sliding actuators to move the walking feet from a first position to a second position;moving the land-based drilling rig in a first direction;retracting the hydraulic lifts;placing the land-based drilling rig on the ground; andactuating the sliding actuators to return the walking feet to the first position.

21. The method of claim 20 further comprising: rotating the hydraulic walkers;repeating the extending, lifting, actuating, retracting, and reactuating operations; andmoving the land-based drilling rig in a second direction.

22. The method of claim 20, further comprising: repeating the extending, lifting, actuating, retracting, and reactuating operations until the land-based drilling rig is at a desired second position in the wellsite.

23. The method of claim 22, wherein the desired second position is a second wellhead within the wellsite.