CA2503516A1 - Method and system for circulating fluid in a well system - Google Patents
Method and system for circulating fluid in a well system Download PDFInfo
- Publication number
- CA2503516A1 CA2503516A1 CA002503516A CA2503516A CA2503516A1 CA 2503516 A1 CA2503516 A1 CA 2503516A1 CA 002503516 A CA002503516 A CA 002503516A CA 2503516 A CA2503516 A CA 2503516A CA 2503516 A1 CA2503516 A1 CA 2503516A1
- Authority
- CA
- Canada
- Prior art keywords
- well bore
- fluid
- substantially vertical
- subterranean zone
- vertical well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract 143
- 238000000034 method Methods 0.000 title claims abstract 51
- 238000005553 drilling Methods 0.000 claims abstract 65
- 239000000203 mixture Substances 0.000 claims abstract 36
- 238000005086 pumping Methods 0.000 claims abstract 17
- 239000004215 Carbon black (E152) Substances 0.000 claims 9
- 239000003245 coal Substances 0.000 claims 9
- 238000005520 cutting process Methods 0.000 claims 9
- 229930195733 hydrocarbon Natural products 0.000 claims 9
- 150000002430 hydrocarbons Chemical class 0.000 claims 9
- 230000001276 controlling effect Effects 0.000 claims 7
- 230000001105 regulatory effect Effects 0.000 claims 4
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/067—Separating gases from drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
A method for circulating drilling fluid in a well system includes drilling a substantially vertical well bore (12) from a surface (14) to a subterranean zone (15) and drilling an articulated well bore (30) from the surface to the subterranean zone. The articulated well bore is horizontally offset from the substantially vertical well bore at the surface and intersects the substantially vertical well bore at a junction proximate the subterranean zone. The method includes drilling a drainage bore (50) from the junction in to the subterranean zone and pumping a drilling fluid through the drill string when drilling the drainage bore. The method also includes providing fluid do wn the substantially vertical well bore through a tubing. A fluid mixture retur ns up the substantially vertical well bore outside of the tubing. The fluid mixture comprises the drilling fluid after the drilling fluid exits the dril l string.
Claims (88)
1. A method for circulating drilling fluid in a well system, comprising:
drilling a substantially vertical well bore from a surface to a subterranean zone;
drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string;
providing fluid down the substantially vertical well bore through a tubing, the tubing having an opening at the junction such that the fluid exits the tubing at the junction;
wherein a fluid mixture returns up the substantially vertical well bore outside of the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and controlling at least one of the flow rate ar the composition of the fluid provided down the substantially vertical well bore to control a bottom hole pressure to achieve an under-balanced, balanced or over-balanced drilling condition.
drilling a substantially vertical well bore from a surface to a subterranean zone;
drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string;
providing fluid down the substantially vertical well bore through a tubing, the tubing having an opening at the junction such that the fluid exits the tubing at the junction;
wherein a fluid mixture returns up the substantially vertical well bore outside of the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and controlling at least one of the flow rate ar the composition of the fluid provided down the substantially vertical well bore to control a bottom hole pressure to achieve an under-balanced, balanced or over-balanced drilling condition.
2. The method of claim 1, wherein providing fluid down the substantially vertical well bore comprises providing gas down the substantially vertical well bore.
3. The method of claim 2, wherein the fluid mixture further comprises at least one of: the gas provided down the substantially vertical well bore after the gas exits the tubing;
fluid from the subterranean zone; and cuttings from the subterranean zone.
fluid from the subterranean zone; and cuttings from the subterranean zone.
4. The method of claim 1, further comprising regulating the pumping of the drilling fluid through the drill string to form a fluid seal, the fluid seal comprising a level of fluid that resists gas from the subterranean zone from flowing up the articulated well bore.
5. (Canceled)
6. (Canceled)
7. (Canceled)
8. The method of claim 1, wherein the subterranean zone comprises a coal seam.
9. The method of claim 1, wherein the subterranean zone comprises a hydrocarbon reservoir.
10. The method of claim 1, wherein the fluid provided down the substantially vertical well bore comprises compressed air.
11. A system for circulating drilling fluid through well bores, comprising:
a substantially vertical well bore extending from a surface to a subterranean zone; an articulated well bore extending from the surface to the subterranean zone, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
a drainage bore extending from the junction into the subterranean zone;
a drill string disposed within the articulated well bore, the drill string used to drill the drainage bore; a drilling fluid provided through the drill string and exiting the drill string proximate a drill bit of the drill string;
a tubing disposed within the substantially vertical well bore, the tubing having an open end at the junction;
fluid provided down the substantially vertical well bore, the fluid exiting the tubing at the junction;
a fluid mixture returning up the substantially vertical well bore outside of the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and wherein at least one of the flow rate or the composition of the fluid provided down the substantially vertical well bore is controlled to control a bottom hole pressure of the system to achieve an under-balanced, balanced, or over-balanced drilling condition.
a substantially vertical well bore extending from a surface to a subterranean zone; an articulated well bore extending from the surface to the subterranean zone, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
a drainage bore extending from the junction into the subterranean zone;
a drill string disposed within the articulated well bore, the drill string used to drill the drainage bore; a drilling fluid provided through the drill string and exiting the drill string proximate a drill bit of the drill string;
a tubing disposed within the substantially vertical well bore, the tubing having an open end at the junction;
fluid provided down the substantially vertical well bore, the fluid exiting the tubing at the junction;
a fluid mixture returning up the substantially vertical well bore outside of the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and wherein at least one of the flow rate or the composition of the fluid provided down the substantially vertical well bore is controlled to control a bottom hole pressure of the system to achieve an under-balanced, balanced, or over-balanced drilling condition.
12. The system of claim 11, wherein fluid provided down the substantially vertical well bore comprises gas provided down the substantially vertical well bore.
13. The system of claim 12, wherein the fluid mixture comprises at least one of: the gas provided down the substantially vertical well bore after the gas exits the tubing;
fluid from the subterranean zone; and cuttings from the subterranean zone.
fluid from the subterranean zone; and cuttings from the subterranean zone.
14. The system of claim 11, further comprising a fluid seal in the articulated well bore, the fluid seal comprising a level of fluid that resists gas from the subterranean zone from flowing up the articulated well bore.
15. (Canceled)
16. (Canceled)
17. The system of claim 11, wherein the subterranean zone comprises a coal seam.
18. The system of claim 11, wherein the subterranean zone comprises a hydrocarbon reservoir.
19. The system of claim 11, wherein the fluid provided down the substantially vertical well bore comprises compressed air.
20. A method for circulating drilling fluid in a well system, comprising:
drilling a substantially vertical well bore from a surface to a subterranean zone drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string;
providing fluid down the substantially vertical well bore outside of a tubing disposed in the substantially vertical well bore, the tubing having an opening at the junction;
wherein a fluid mixture enters the opening of the tubing at the junction and returns up the substantially vertical well bore through the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and controlling at least one of a flow rate or a composition of the fluid provided down the substantially vertical well bore to control a bottom hole pressure, to achieve an under-balanced, balanced, or over balanced drilling condition.
drilling a substantially vertical well bore from a surface to a subterranean zone drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string;
providing fluid down the substantially vertical well bore outside of a tubing disposed in the substantially vertical well bore, the tubing having an opening at the junction;
wherein a fluid mixture enters the opening of the tubing at the junction and returns up the substantially vertical well bore through the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and controlling at least one of a flow rate or a composition of the fluid provided down the substantially vertical well bore to control a bottom hole pressure, to achieve an under-balanced, balanced, or over balanced drilling condition.
21. The method of claim 20, wherein providing fluid down the substantially vertical well bore comprises providing gas down the substantially vertical well bore.
22. The method of claim 21, wherein the fluid mixture further comprises at least one of: the gas provided down the substantially vertical well bore; fluid from the subterranean zone; and cuttings from the subterranean zone.
23. (Canceled)
24. (Canceled)
25. (Canceled)
26. The method of claim 20, wherein the subterranean zone comprises a coal seam.
27. The method of claim 20, wherein the subterranean zone comprises a hydrocarbon reservoir.
28. The method of claim 20, wherein the fluid provided down the substantially vertical well bore comprises compressed air.
29. A system for circulating drilling fluid through well bores, comprising:
a substantially vertical well bore extending from a surface to a subterranean zone;
an articulated well bore extending from the surface to the subterranean zone, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
a drainage bore extending from the junction into the subterranean zone;
a drill string disposed within the articulated well bore, the drill string used to drill the drainage bore;
a drilling fluid provided through the drill string and exiting the drill string proximate a drill bit of the drill string; a tubing disposed within the substantially vertical well bore, the tubing having an opening at the junction; fluid provided down the substantially vertical well bore outside the tubing;
a fluid mixture entering the opening of the tubing at the junction and returning up the substantially vertical well bore through the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and wherein the flow rate of the fluid provided down the substantially vertical well bore is varied to control a bottom hole pressure of the system to achieve an under-balanced, balanced, or over-balanced drilling condition.
a substantially vertical well bore extending from a surface to a subterranean zone;
an articulated well bore extending from the surface to the subterranean zone, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
a drainage bore extending from the junction into the subterranean zone;
a drill string disposed within the articulated well bore, the drill string used to drill the drainage bore;
a drilling fluid provided through the drill string and exiting the drill string proximate a drill bit of the drill string; a tubing disposed within the substantially vertical well bore, the tubing having an opening at the junction; fluid provided down the substantially vertical well bore outside the tubing;
a fluid mixture entering the opening of the tubing at the junction and returning up the substantially vertical well bore through the tubing, the fluid mixture comprising the drilling fluid after the drilling fluid exits the drill string; and wherein the flow rate of the fluid provided down the substantially vertical well bore is varied to control a bottom hole pressure of the system to achieve an under-balanced, balanced, or over-balanced drilling condition.
30. The system of claim 29, wherein fluid provided down the substantially vertical well bore comprises gas provided down the substantially vertical well bore.
31. The system of claim 30, wherein the fluid mixture comprises at least one of: the gas provided down the substantially vertical well bore; fluid from the subterranean zone; and cuttings from the subterranean zone.
32. (Canceled)
33. (Canceled)
34. The system of claim 29, wherein the subterranean zone comprises a coal seam.
35. The system of claim 29, wherein the subterranean zone comprises a hydrocarbon reservoir.
36. The system of claim 29, wherein the fluid provided down the substantially vertical well bore comprises compressed air.
37. ~A method for circulating fluid in a well system, comprising:
pumping a first fluid through an articulated well bore, the articulated well bore horizontally offset from a substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate a subterranean zone;
providing a second fluid down the substantially vertical well bore through a tubing, the tubing having an opening at the junction such that the second fluid exits the tubing at the junction;
wherein a fluid mixture returns up the substantially vertical well bore outside of the tubing, the fluid mixture comprising the first fluid; and controlling at least one of a flow rate or composition of the second fluid provided down the substantially vertical well bore to control a bottom hole pressure to achieve an under-balanced, balanced or over-balanced drilling condition.
pumping a first fluid through an articulated well bore, the articulated well bore horizontally offset from a substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate a subterranean zone;
providing a second fluid down the substantially vertical well bore through a tubing, the tubing having an opening at the junction such that the second fluid exits the tubing at the junction;
wherein a fluid mixture returns up the substantially vertical well bore outside of the tubing, the fluid mixture comprising the first fluid; and controlling at least one of a flow rate or composition of the second fluid provided down the substantially vertical well bore to control a bottom hole pressure to achieve an under-balanced, balanced or over-balanced drilling condition.
38. ~The method of claim 37, wherein the first fluid is pumped through the articulated well bore while making connections to a drill string in the articulated well bore.
39. ~The method of claim 37, wherein the first fluid is pumped through the articulated well bore while tripping a drill string in the articulated well bore.
40. ~The method of claim 37, wherein providing a second fluid down the substantially vertical well bore comprises providing gas down the substantially vertical well bore.
41. The method of claim 40, wherein the fluid mixture further comprises at least one of: the gas provided down the substantially vertical well bore after the gas exits the tubing;
fluid from the subterranean zone; and cuttings from the subterranean zone.
fluid from the subterranean zone; and cuttings from the subterranean zone.
42. The method of claim 37, further comprising regulating the pumping of the first fluid through the articulated well bore to form a fluid seal, the fluid seal comprising a level of fluid that resists gas from the subterranean zone from flowing up the articulated well bore.
43. (Canceled)
44. (Canceled)
45. (Canceled)
46. The method of claim 37, wherein the subterranean zone comprises a coal seam.
47. The method of claim 37, wherein the subterranean zone comprises a hydrocarbon reservoir.
48. The method of claim 37, wherein the second fluid comprises compressed air.
49. A method for circulating fluid in a well system, comprising:
pumping a first fluid through an articulated well bore, the articulated well bore horizontally offset from a substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate a subterranean zone;
providing a second fluid down the substantially vertical well bore outside of a tubing disposed in the substantially vertical well bore, the tubing having an opening at the junction;
wherein a fluid mixture enters the opening of the tubing at the junction and returns up the substantially vertical well bore through the tubing, the fluid mixture comprising the first fluid; and controlling at least one of a flow rate or a composition of the second fluid provided down the substantially vertical well bore to control a bottom hole pressure to achieve an under-balanced, balanced, or over-balanced drilling condition.
pumping a first fluid through an articulated well bore, the articulated well bore horizontally offset from a substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate a subterranean zone;
providing a second fluid down the substantially vertical well bore outside of a tubing disposed in the substantially vertical well bore, the tubing having an opening at the junction;
wherein a fluid mixture enters the opening of the tubing at the junction and returns up the substantially vertical well bore through the tubing, the fluid mixture comprising the first fluid; and controlling at least one of a flow rate or a composition of the second fluid provided down the substantially vertical well bore to control a bottom hole pressure to achieve an under-balanced, balanced, or over-balanced drilling condition.
50. The method of claim 49, wherein the first fluid is pumped through the articulated well bore while making connections to a drill string in the articulated well bore.
51. The method of claim 49, wherein the first fluid is pumped through the articulated well bore while tripping a drill string in the articulated well bore.
52. The method of claim 49, wherein providing a second fluid down the substantially vertical well bore comprises providing gas down the substantially vertical well bore.
53. The method of claim 52, wherein the fluid mixture further comprises at least one of: .the gas provided down the substantially vertical well bore; fluid from the subterranean zone; and cuttings from the subterranean zone.
54. (Canceled)
55. (Canceled)
56. (Canceled)
57. The method of claim 49, wherein the subterranean zone comprises a coal seam.
58. The method of claim 49, wherein the subterranean zone comprises a hydrocarbon reservoir.
59. The method of claim 49, wherein the second fluid comprises compressed air.
60. A method for circulating drilling fluid in a well system, comprising:
drilling a substantially vertical well bore from a surface to a subterranean zone:
drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string;
providing a pump string down the substantially vertical well bore, the pump string comprising a pump inlet proximate the junction;
pumping a fluid mixture up the substantially vertical well bore through the pump string, the fluid mixture entering the pump string at the pump inlet; and controlling the speed of the pumping of the fluid mixture up the substantially vertical well bore through the pump string to control a bottom hole pressure to achieve an under-balanced, balanced or over-balanced drilling condition.
drilling a substantially vertical well bore from a surface to a subterranean zone:
drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string;
providing a pump string down the substantially vertical well bore, the pump string comprising a pump inlet proximate the junction;
pumping a fluid mixture up the substantially vertical well bore through the pump string, the fluid mixture entering the pump string at the pump inlet; and controlling the speed of the pumping of the fluid mixture up the substantially vertical well bore through the pump string to control a bottom hole pressure to achieve an under-balanced, balanced or over-balanced drilling condition.
61. The method of claim 60, wherein the fluid mixture comprises at least one of: the drilling fluid after the drilling fluid exits the drill string; fluid from the subterranean zone;
and cuttings from the subterranean zone.
and cuttings from the subterranean zone.
62. The method of claim 60, further comprising regulating the pumping of the drilling fluid through the drill string to form a fluid seal, the fluid seal comprising a level of fluid that resists gas from the subterranean zone from flowing up the articulated well bore.
63. The method of claim 60, further comprising: providing a pressure sensor down the substantially vertical well bore; and detecting a pressure of the substantially vertical well bore using the pressure sensor.
64. (Canceled)
65. (Canceled)
66. The method of claim 60, wherein the subterranean zone comprises a coal seam.
67. The method of claim 60, wherein the subterranean zone comprises a hydrocarbon reservoir.
68. A system for circulating drilling fluid through well bores, comprising:
a substantially vertical well bore extending from a surface to a subterranean zone;
an articulated well bore extending from the surface to the subterranean zone, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
a drainage bore extending from the junction into the subterranean zone;
a drill string disposed within the articulated well bore, the drill string used to drill the drainage bore;
a drilling fluid provided through the drill string and exiting the drill string proximate a drill bit of the drill string;
a pump string disposed within the substantially vertical well bore, the pump string comprising a pump inlet proximate the junction;
a fluid mixture entering the pump string at the pump inlet and pumped up the substantially vertical well bore through the pump string; and a a pump operable to control the speed of the pumping of the fluid mixture up the substantially vertical well bore through the pump string to control a bottom hole pressure of the system to achieve an under-balanced, balanced or over-balanced drilling condition.
a substantially vertical well bore extending from a surface to a subterranean zone;
an articulated well bore extending from the surface to the subterranean zone, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
a drainage bore extending from the junction into the subterranean zone;
a drill string disposed within the articulated well bore, the drill string used to drill the drainage bore;
a drilling fluid provided through the drill string and exiting the drill string proximate a drill bit of the drill string;
a pump string disposed within the substantially vertical well bore, the pump string comprising a pump inlet proximate the junction;
a fluid mixture entering the pump string at the pump inlet and pumped up the substantially vertical well bore through the pump string; and a a pump operable to control the speed of the pumping of the fluid mixture up the substantially vertical well bore through the pump string to control a bottom hole pressure of the system to achieve an under-balanced, balanced or over-balanced drilling condition.
69. The system of claim 68, wherein the fluid mixture comprises at least one of: the drilling fluid after the drilling fluid exits the drill string; fluid from the subterranean zone;
and cuttings from the subterranean zone.
and cuttings from the subterranean zone.
70. The system of claim 6B, further comprising a fluid seal in the articulated well bore, the fluid seal comprising a level of fluid that resists gas from the subterranean zone from flowing up the articulated well bore.
71. The system of claim 68, further comprising a pressure sensor provided down the substantially vertical well bore, the pressure sensor operable to detect a pressure of the substantially vertical well bore.
72. (Canceled)
73. (Canceled)
74. The system of claim 68, wherein the subterranean zone comprises a coal seam.
75. The system of claim 68, wherein the subterranean zone comprises a hydrocarbon reservoir.
76. A method for circulating fluid in a well system, comprising:
pumping a fluid through an articulated well bore, the articulated well bore horizontally offset from a substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate a subterranean zone;
providing a pump string down the substantially vertical well bore, the pump string comprising a pump inlet proximate the junction;
pumping a fluid mixture up the substantially vertical well bore through the pump string, the fluid mixture entering the pump string at the pump inlet; and controlling the speed of the pumping of the fluid mixture up the substantially vertical well bore through the pump string to control a bottom hole pressure to achieve an under-balanced, balanced, or over-balanced drilling condition.
pumping a fluid through an articulated well bore, the articulated well bore horizontally offset from a substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate a subterranean zone;
providing a pump string down the substantially vertical well bore, the pump string comprising a pump inlet proximate the junction;
pumping a fluid mixture up the substantially vertical well bore through the pump string, the fluid mixture entering the pump string at the pump inlet; and controlling the speed of the pumping of the fluid mixture up the substantially vertical well bore through the pump string to control a bottom hole pressure to achieve an under-balanced, balanced, or over-balanced drilling condition.
77. The method of claim 76, wherein the fluid is pumped through the articulated well bore while making connections to a drill string in the articulated well bore.
78. The method of claim 76, wherein the fluid is pumped through the articulated well bore while tripping a drill string in the articulated well bore.
79. The method of claim 76, wherein the fluid mixture further comprises at least one of: the fluid pumped through the articulated well bore; fluid from the subterranean zone; and cuttings from the subterranean zone.
80. The method of claim 76, further comprising regulating the pumping of the fluid through the articulated well bore to form a fluid seal, the fluid seal comprising a level of fluid that resists gas from the subterranean zone from flowing up the articulated well bore.
81. The method of claim 76, further comprising: providing a pressure sensor down the substantially vertical well bore; and detecting a pressure of the substantially vertical well bore using the pressure sensor.
82. (Canceled)
83. (Canceled)
84. The method of claim 76, wherein the subterranean zone comprises a coal seam.
85. The method of claim 76, wherein the subterranean zone comprises a hydrocarbon reservoir.
86. A method for circulating drilling fluid in a well system, comprising:
drilling a substantially vertical well bore from a surface to a subterranean zone;
drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling, fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string; and providing fluid to at least one of the well bores to control a bottom hole pressure of the system.
drilling a substantially vertical well bore from a surface to a subterranean zone;
drilling an articulated well bore from the surface to the subterranean zone using a drill string, the articulated well bore horizontally offset from the substantially vertical well bore at the surface and intersecting the substantially vertical well bore at a junction proximate the subterranean zone;
drilling a drainage bore from the junction into the subterranean zone;
pumping a drilling, fluid through the drill string when drilling the drainage bore, the drilling fluid exiting the drill string proximate a drill bit of the drill string; and providing fluid to at least one of the well bores to control a bottom hole pressure of the system.
87. The method of claim 86, wherein the fluid provided to at least one of the well bores comprises compressed air.
88. The method of claim 86, further comprising controlling a flow rate of the fluid provided to at least one of the well bores to control the bottom hole pressure.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/323,192 | 2002-12-18 | ||
US10/323,192 US7025154B2 (en) | 1998-11-20 | 2002-12-18 | Method and system for circulating fluid in a well system |
PCT/US2003/038383 WO2004061267A1 (en) | 2002-12-18 | 2003-12-02 | Method and system for circulating fluid in a well system |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2503516A1 true CA2503516A1 (en) | 2004-07-22 |
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-
2002
- 2002-12-18 US US10/323,192 patent/US7025154B2/en not_active Expired - Fee Related
-
2003
- 2003-02-12 UA UAA200507103A patent/UA82860C2/en unknown
- 2003-12-02 DE DE60326268T patent/DE60326268D1/en not_active Expired - Fee Related
- 2003-12-02 CN CNB2003801052041A patent/CN100572748C/en not_active Expired - Fee Related
- 2003-12-02 RU RU2005122451/03A patent/RU2341654C2/en not_active IP Right Cessation
- 2003-12-02 WO PCT/US2003/038383 patent/WO2004061267A1/en not_active Application Discontinuation
- 2003-12-02 PL PL377412A patent/PL212088B1/en unknown
- 2003-12-02 AT AT03799866T patent/ATE423268T1/en not_active IP Right Cessation
- 2003-12-02 AU AU2003299580A patent/AU2003299580B2/en not_active Ceased
- 2003-12-02 CA CA2503516A patent/CA2503516C/en not_active Expired - Fee Related
- 2003-12-02 EP EP03799866A patent/EP1573170B1/en not_active Expired - Lifetime
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2005
- 2005-07-22 US US11/188,250 patent/US8434568B2/en not_active Expired - Fee Related
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2008
- 2008-06-30 RU RU2008126371/03A patent/RU2416711C2/en not_active IP Right Cessation
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PL377412A1 (en) | 2006-02-06 |
EP1573170A1 (en) | 2005-09-14 |
AU2003299580B2 (en) | 2011-06-16 |
CN1720386A (en) | 2006-01-11 |
US8434568B2 (en) | 2013-05-07 |
US20040055787A1 (en) | 2004-03-25 |
RU2341654C2 (en) | 2008-12-20 |
CA2503516C (en) | 2012-01-31 |
UA82860C2 (en) | 2008-05-26 |
RU2416711C2 (en) | 2011-04-20 |
PL212088B1 (en) | 2012-08-31 |
US7025154B2 (en) | 2006-04-11 |
RU2005122451A (en) | 2006-04-27 |
WO2004061267A1 (en) | 2004-07-22 |
CN100572748C (en) | 2009-12-23 |
US20050257962A1 (en) | 2005-11-24 |
DE60326268D1 (en) | 2009-04-02 |
AU2003299580A1 (en) | 2004-07-29 |
EP1573170B1 (en) | 2009-02-18 |
RU2008126371A (en) | 2010-01-10 |
ATE423268T1 (en) | 2009-03-15 |
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