UNDULATING WELL BORE
First Claim
1. A subterranean drainage pattern for accessing an area of a subterranean zone comprising at least one undulating well bore, the undulating well bore confined within a single layer of subterranean deposits and comprising:
- at least one inclining portion drilled through the subterranean zone at an inclination sloping toward an upper boundary of the single layer of subterranean deposits;
at least one declining portion drilled through the subterranean zone at a declination sloping toward a lower boundary of the single layer of subterranean deposits; and
at least one bending portion coupling the at least one inclining portion and the at least one declining portion to form a waveform.
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0 Petitions
Accused Products
Abstract
In accordance with one embodiment of the present invention, a subterranean drainage pattern for accessing a subterranean zone includes at least one undulating well bore. The undulating well bore includes at least one inclining portion drilled through the subterranean zone at an inclination sloping toward an upper boundary of the single layer of subterranean deposits and at least one declining portion drilled through the subterranean zone at a declination sloping toward a lower boundary of the single layer of subterranean deposits. At least one bending portion couples the at least one inclining portion and the at least one declining portion to form a waveform.
27 Citations
52 Claims
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1. A subterranean drainage pattern for accessing an area of a subterranean zone comprising at least one undulating well bore, the undulating well bore confined within a single layer of subterranean deposits and comprising:
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at least one inclining portion drilled through the subterranean zone at an inclination sloping toward an upper boundary of the single layer of subterranean deposits;
at least one declining portion drilled through the subterranean zone at a declination sloping toward a lower boundary of the single layer of subterranean deposits; and
at least one bending portion coupling the at least one inclining portion and the at least one declining portion to form a waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A subterranean drainage pattern for accessing an area of a subterranean zone comprising at least one undulating well bore traveling through a plurality of layers of subterranean deposits separated by intervening layers of substantially impermeable material, the undulating well bore comprising:
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at least one inclining portion traveling through the plurality of layers at an inclination sloping toward the earth'"'"'s surface;
at least one declining portion traveling through the plurality of layers at a declination sloping away from the earth'"'"'s surface; and
at least one bending portion coupling the at least one inclining portion and the at least one declining portion to form a waveform. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for accessing an area of a subterranean zone comprising at least one undulating well bore confined with a single layer of subterranean deposits, the method comprising:
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drilling at least one inclining portion of a well bore through the subterranean zone at an inclination sloping toward an upper boundary of the single layer of subterranean deposits;
drilling at least one declining portion through the subterranean zone at a declination sloping toward a lower boundary of the single layer of subterranean deposits;
drilling at least one bending portion coupling the at least one inclining portion and the at least one declining portion; and
drilling a plurality of waveforms, each waveform comprising an inclining portion, a declining portion, and a bending portion. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method for accessing an area of a subterranean zone comprising at least one undulating well bore traveling through a plurality of layers of subterranean deposits separated by intervening layers of substantially impermeable material, the method comprising:
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drilling at least one inclining portion of a well bore traveling through the plurality of layers at an inclination sloping toward the earth'"'"'s surface;
drilling at least one declining portion traveling through the plurality of layers at a declination sloping away from the earth'"'"'s surface;
drilling at least one bending portion coupling the at least one inclining portion and the at least one declining portion; and
drilling a plurality of waveforms, each waveform comprising an inclining portion, a declining portion, and a bending portion. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification