Reverse circulation directional and horizontal drilling using concentric drill string
First Claim
1. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
- providing a concentric drill string comprising an inner pipe having an inside wall and an outside wall and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes;
connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, to the concentric drill string;
delivering drilling medium through one of said annulus or inner pipe to the directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium through the other of said annulus or inner pipe to the surface of the wellbore; and
providing a downhole flow control means positioned at or near the directional drilling means, said downhole flow control means having an open position and a closed position, whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium or exhaust drilling medium through the inner pipe and the annulus and in the closed position when well control is necessary to prevent the flow of hydrocarbons through the inner pipe and the annulus to the surface of the wellbore.
1 Assignment
0 Petitions
Accused Products
Abstract
Method and apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation using concentric drill string having an inner pipe and an outer pipe defining an annulus there between. A bottomhole assembly comprising a directional drilling means such as an air hammer or a rotary drill bit and driving system is provide at the lower end of the concentric drill string and drilling medium is delivered through the annulus or inner pipe for operating the directional drilling means to form a borehole. Exhaust drilling medium, drilling cutting and hydrocarbon are removed from the wellbore by extracting the exhaust drilling medium, drilling cutting and hydrocarbon through the other of the annulus or inner pipe.
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Citations
50 Claims
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1. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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providing a concentric drill string comprising an inner pipe having an inside wall and an outside wall and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, to the concentric drill string; delivering drilling medium through one of said annulus or inner pipe to the directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium through the other of said annulus or inner pipe to the surface of the wellbore; and providing a downhole flow control means positioned at or near the directional drilling means, said downhole flow control means having an open position and a closed position, whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium or exhaust drilling medium through the inner pipe and the annulus and in the closed position when well control is necessary to prevent the flow of hydrocarbons through the inner pipe and the annulus to the surface of the wellbore. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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2. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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providing a concentric drill string comprising an inner pipe having an inside wall and an outside wall and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole and one or more tools selected from the group consisting of a downhole data collection and transmission means, a shock sub, a drill collar and an interchange means, to the concentric drill string; delivering drilling medium through one of said annulus or inner pipe to the directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium through the other of said annulus or inner pipe to the surface of the wellbore; and providing a downhole flow control means positioned at or near the directional drilling means, said downhole flow control means having an open position and a closed position, whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium or exhaust drilling medium through the inner pipe and the annulus and in the closed position when well control is necessary to prevent the flow of hydrocarbons through the inner pipe and the annulus to the surface of the wellbore. - View Dependent Claims (23)
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24. An apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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a concentric drill string comprising an inner pipe having an inside wall and an outside wall and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole and a downhole flow control means having an open position and a closed position, operably connected to the concentric drill string; a drilling medium delivery means for delivering drilling medium through one of said annulus or inner pipe to the directional drilling means for entraining and removing drill cuttings through the other of said annulus or inner pipe; whereby when the downhole flow control means is in the open position drilling medium can flow through both the inner pipe and the annulus and when the downhole flow control means is in the closed position hydrocarbons are prevented from flowing through both the inner pipe and the annulus to the surface of the wellbore. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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providing a concentric drill string comprising an inner pipe, said inner pipe having an inside wall and an outside wall, and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, to the concentric drill string; and delivering drilling medium through said inner pipe to said directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium primary through said annulus to the surface of the wellbore; providing a downhole flow control means positioned at or near the directional drilling means, said downhole flow control means having an open position and a closed position, whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium down through the inner pipe and exhaust drilling medium up through the annulus and in the closed position when well control is necessary to prevent the flow of hydrocarbons up through the annulus to the surface of the well bore. - View Dependent Claims (44)
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43. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising the steps of:
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providing a concentric drill string comprising an inner pipe, said inner pipe having an inside wall and an outside wall, and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, to the concentric drill string; delivering drilling medium through said annulus to said directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium through said inner pipe to the surface of the wellbore; and providing a downhole flow control means positioned at or near the directional drilling means, said downhole flow control means having an open position and a closed position, whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium down through the annulus and exhaust drilling medium up through the inner pipe and in the closed position when well control is necessary to prevent the flow of hydrocarbons up through the inner pipe to the surface of the wellbore.
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45. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising the steps of:
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providing a concentric drill string comprising an inner pipe, said inner pipe having an inside wall and an outside wall, and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, to the concentric drill string; delivering drilling medium through one of said annulus or inner pipe to said directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium through said other of said annulus or inner pipe; providing a surface flow control means positioned at or near the surface of the wellbore for preventing flow of hydrocarbons from a space between the outside wall of the outer pipe and a wall of the wellbore, said surface flow control means having a discharging means and said discharging means having a flare means; and removing said exhaust drilling medium through said discharging means from said wellbore and flaring any hydrocarbons produced from the wellbore.
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46. An apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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a concentric drill string comprising an inner pipe, said inner pipe having an inside wall and an outside wall, and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole and a downhole flow control means having an open position and a closed position, operably connected to the concentric drill string; and a drilling medium delivery means for delivering drilling medium through the inner pipe to the directional drilling means for entraining and removing drill cuttings through the annulus; whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium down through the inner pipe and up through the annulus and in the closed position during well control operations to prevent the flow of hydrocarbons up through the annulus to the surface of the well bore.
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47. An apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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a concentric drill string comprising an inner pipe, said inner pipe having an inside wall and an outside wall, and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, operably connected to the concentric drill string; a drilling medium delivery means for delivering drilling medium through one of said annulus or inner pipe to the directional drilling means for entraining and removing drill cuttings through said other of said annulus or inner pipe; a surface flow control means positioned at or near the surface of the wellbore for preventing flow of hydrocarbons from a space between the outside wall of the outer pipe and a wall of the wellbore; a discharging means attached to said surface flow control means for discharging said drilling medium and said entrained drill cuttings from the wellbore; and a flare means attached to said discharging means for flaring any hydrocarbons produced from the wellbore.
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48. An apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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a concentric drill string comprising an inner pipe, said inner pipe having an inside wall and an outside wall, and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole and a downhole flow control means having an open position and a closed position, operably connected to the concentric drill string; and a drilling medium delivery means for delivering drilling medium through the annulus to the directional drilling means for entraining and removing drill cuttings through the inner pipe; whereby said downhole flow control means is in the open position during active drilling to allow the flow of drilling medium down through the annulus and up through the inner pipe and in the closed position during well control operations to prevent the flow of hydrocarbons up through the inner pipe to the surface of the well bore.
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49. A method of drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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providing a concentric drill string consisting essentially of an inner pipe having an inside wall and an outside wall and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; connecting a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole, to the concentric drill string; delivering drilling medium through one of said annulus or inner pipe to the directional drilling means and removing exhaust drilling medium by extracting said exhaust drilling medium primarily through said other of said annulus or inner pipe and to the surface of the wellbore by means of said other of said annulus or inner pipe; providing a surface flow control means positioned at or near the surface of the wellbore for preventing flow of hydrocarbons from a space between the outside wall of the outer pipe and a wall of the wellbore, said surface flow control means having a discharging means and said discharging means having a flare means; and removing said exhaust drilling medium through said discharging means from said wellbore and flaring any hydrocarbons produced from the wellbore.
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50. An apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation, comprising:
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a concentric drill string consisting essentially of an inner pipe having an inside wall and an outside wall and an outer pipe having an inside wall and an outside wall, said outside wall of said inner pipe and said inside wall of said outer pipe defining an annulus between the pipes; a bottomhole assembly, said bottomhole assembly comprising a directional drilling means for forming a borehole and one or more tools selected from the group consisting of a downhole data collection and transmission means, a shock sub, a drill collar and an interchange means for directing said drilling medium and entrained drill cuttings through said annulus or inner pipe, operably connected to the concentric drill string; a drilling medium delivery means for delivering drilling medium through one of said annulus or inner pipe to the directional drilling means for entraining and removing drill cuttings through said other of said annulus or inner pipe; a surface flow control means positioned at or near the surface of the wellbore for preventing flow of hydrocarbons from a space between the outside wall of the outer pipe and a wall of the wellbore; a discharging means attached to said surface flow control means for discharging said drilling medium and said entrained drill cuttings from the wellbore; and a flare means attached to said discharging means for flaring hydrocarbons produced from the wellbore.
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Specification