Integrated mill and perforating downhole tool

1 . An integrated mill and perforating downhole tool, comprising:

an elongate body having opposing first and second ends and defining a fluid passage extending therebetween to receive a fluid;

an outer body disposed around the elongate body and defining a hydraulic actuation chamber between an inner surface of the outer body and an outer surface of the elongate body;

one or more bypass ports defined in the elongate body and in fluid communication with the hydraulic actuation chamber;

a mill operatively coupled to the elongate body at the second end;

a perforating tool operatively coupled to the outer body and in fluid communication with the hydraulic actuation chamber, the perforating tool including a punch housed within a housing and laterally moveable from a laterally retracted position to a laterally extended position, and from the laterally extended position to the laterally retracted position; and

a ball seat arranged within the fluid passage and movable between a first position, where fluid communication is blocked between the hydraulic actuation chamber and the fluid passage via the one or more bypass ports, and a second position, where the one or more bypass ports are exposed and facilitate fluid communication between the fluid passage and the perforating tool through the hydraulic actuation chamber,

wherein the mill is operable when the ball seat is in the first position, and wherein, when the ball seat is in the second position, fluid pressure within the fluid passage communicates with the perforating tool via the one or more bypass ports and the hydraulic actuation chamber to actuate the perforating tool.

2 . The downhole tool of claim 1 , wherein the fluid comprises at least one of a drilling fluid and a drilling mud.

3 . The downhole tool of claim 1 , further comprising a sliding sleeve coupled to the ball seat such that moving the ball seat correspondingly moves the sliding sleeve, wherein the sliding sleeve occludes the one or more bypass ports when the ball seat is in the first position, and wherein the sliding sleeve moves to expose the one or more bypass ports when the ball seat moves to the second position.

4 . The downhole tool of claim 1 , wherein the ball seat defines a central aperture and the fluid circulates through the central aperture when the ball seat is in the first position.

5 . The downhole tool of claim 4 , further comprising a wellbore projectile conveyable into the fluid passage and receivable at the ball seat to occlude the central aperture, wherein, increasing a fluid pressure within the flow passage to a first pressure after the wellbore projectile occludes the central aperture causes the ball seat to move to the second position.

6 . The downhole tool of claim 5 , further comprising a biasing member interposing the ball seat and a support structure arranged within the elongate body, wherein the biasing member is biased toward an expanded state to position the ball seat in the first position, the biasing member being progressively compressed toward a compressed state as the ball seat moves to the second position.

7 . The downhole tool of claim 6 , wherein at least a portion of the ball seat is made of a material configured to fail upon assuming a predetermined load, and wherein increasing the fluid pressure within the flow passage to a second pressure greater than the first pressure forces the wellbore projectile through the ball seat.

8 . The downhole tool of claim 7 , further comprising a ball catcher arranged within the elongate body downstream from the ball seat to receive the wellbore projectile after the wellbore projectile is forced through the ball seat.

9 . The downhole tool of claim 1 , further comprising a sliding sleeve having a first end and a second end, the second end is defined by the ball seat, the sliding sleeve being configured to block the one or more bypass ports when the ball seat is in the first position, wherein the one or more bypass ports interpose the first end and the ball seat when the ball seat is in the first position.

10 . The downhole tool of claim 1 , wherein the ball seat defines a central aperture and the fluid circulates through the central aperture when the ball seat is in the first position, the downhole tool further comprising a ball catcher arranged downstream from the ball seat to receive the wellbore projectile after the wellbore projectile is forced through the ball seat.

11 . A method of milling and punching within a wellbore, comprising:

conveying an integrated mill and perforating downhole tool into a tubing disposed within the wellbore on a drill string, the integrated mill and perforating downhole tool including:

an elongate body having opposing first and second ends and defining a fluid passage extending therebetween;

a mill operatively coupled to the elongate body at the second end;

a perforating tool operatively coupled to the elongate body at a location between the first and second ends, the perforating tool including a punch housed within a housing and moveable between a laterally retracted position and a laterally extended position; and

a ball seat arranged within the fluid passage and defining a central aperture;

circulating a fluid into the fluid passage, through the central aperture, and to the mill when the ball seat is in a first position, where one or more bypass ports defined in the elongate body are blocked;

moving the ball seat to a second position, where the one or more bypass ports are exposed;

circulating the fluid to the perforating tool via the one or more bypass ports and thereby actuating the perforating tool to laterally extend the punch from the laterally retracted position to the laterally extended position and forming a perforation in the tubing; and

retracting the punch from the laterally extended position to the laterally retracted position after forming the perforation by decreasing a pressure within the fluid passage.

12 . The method of claim 11 , wherein moving the ball seat to the second position comprises:

conveying a wellbore projectile through the drill string and into the fluid passage;

receiving the wellbore projectile at the ball seat and thereby occluding the central aperture;

increasing a fluid pressure within the flow passage to a first pressure and thereby moving the ball seat to the second position.

13 . The method of claim 12 , further comprising:

increasing the fluid pressure within the flow passage to a second pressure greater than the first pressure;

forcing the wellbore projectile through the ball seat;

moving the ball seat back to the first position; and

circulating the fluid into the fluid passage and to the mill.

14 . The method of claim 12 , wherein circulating the fluid to the perforating tool via the one or more bypass ports and thereby actuating the perforating tool comprises circulating the fluid through the one or more bypass ports while the central aperture is occluded by the wellbore projectile.

15 . The method of claim 12 , wherein circulating the fluid to the perforating tool and thereby actuating the perforating tool comprises:

circulating the fluid to the perforating tool via a hydraulic actuation chamber extending between the one or more bypass ports and the perforating tool, the hydraulic actuation chamber being defined between an outer surface of the elongate body and an inner surface of an outer body arranged around the elongate body; and

increasing the fluid pressure with the flow passage to a second pressure greater than the first pressure and thereby actuating the perforating tool.

16 . The method of claim 15 , wherein retracting the punch further comprises decreasing the fluid pressure less than the first and second pressures within the flow passage and thereby causing the perforating tool to revert back to a non-operative state where the punch laterally retracts back into the housing to the laterally retracted position.

17 . The method of claim 11 , wherein the integrated mill and perforating downhole tool further includes a biasing member interposing the ball seat and a support structure arranged within the elongate body to bias the ball seat toward the first position, and wherein moving the ball seat to the second position comprises progressively compressing the biasing member from an expanded state to a compressed state as the ball seat moves to the second position.

18 . The method of claim 11 , wherein the one or more bypass ports are located uphole of the ball seat and the central aperture when the ball seat is in the first and second positions.

19 . An integrated mill and perforating downhole tool, comprising:

an elongate body having opposing first and second ends and defining a fluid passage extending therebetween to receive a fluid;

a mill operatively coupled to the elongate body at the second end;

a perforating tool operatively coupled to the elongate body at a location between the first and second ends;

a ball seat arranged within the fluid passage and movable between a first position, where one or more bypass ports defined in the elongate body are blocked, and a second position, where the one or more bypass ports are exposed and facilitate fluid communication between the fluid passage and the perforating tool, wherein the ball seat defines a central aperture and the fluid circulates through the central aperture when the ball seat is in the first position;

a biasing member interposing the ball seat and a support structure arranged within the elongate body, wherein the biasing member is progressively compressed as the ball seat moves to the second position;

a wellbore projectile conveyable into the fluid passage and receivable at the ball seat to occlude the central aperture; and

a ball catcher arranged downstream from the ball seat to receive the wellbore projectile when the wellbore projectile is forced through the ball seat,

wherein increasing a fluid pressure within the flow passage to a first pressure after the wellbore projectile occludes the central aperture causes the ball seat to move to the second position, and at least a portion of the ball seat is made of a material configured to fail upon assuming a predetermined load,

wherein increasing the fluid pressure within the flow passage to a second pressure greater than the first pressure forces the wellbore projectile through the ball seat, and

wherein the mill is operable when the ball seat is in the first position, and wherein, when the ball seat is in the second position, fluid pressure within the fluid passage communicates with the perforating tool via the one or more bypass ports to actuate the perforating tool.

20 . The downhole tool of claim 19 , further comprising a sliding sleeve having a first end and a second end, the second end is defined by the ball seat, the sliding sleeve being configured to block the one or more bypass ports when the ball seat is in the first position, wherein the one or more bypass ports interpose the first end and the ball seat when the ball seat is in the first position.