CA2503113A1 - Method and apparatus for isolating and testing zones during reverse circulation drilling - Google Patents
Method and apparatus for isolating and testing zones during reverse circulation drilling Download PDFInfo
- Publication number
- CA2503113A1 CA2503113A1 CA002503113A CA2503113A CA2503113A1 CA 2503113 A1 CA2503113 A1 CA 2503113A1 CA 002503113 A CA002503113 A CA 002503113A CA 2503113 A CA2503113 A CA 2503113A CA 2503113 A1 CA2503113 A1 CA 2503113A1
- Authority
- CA
- Canada
- Prior art keywords
- drill string
- concentric drill
- concentric
- flow control
- control means
- 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
- 238000000034 method Methods 0.000 title claims abstract 9
- 238000005553 drilling Methods 0.000 title claims abstract 6
- 239000012530 fluid Substances 0.000 claims abstract 12
- 238000002955 isolation Methods 0.000 claims abstract 11
- 238000004891 communication Methods 0.000 claims abstract 4
- 230000015572 biosynthetic process Effects 0.000 claims 7
- 229930195733 hydrocarbon Natural products 0.000 claims 7
- 150000002430 hydrocarbons Chemical class 0.000 claims 7
- 238000005520 cutting process Methods 0.000 claims 5
- 239000004215 Carbon black (E152) Substances 0.000 claims 2
- 239000005060 rubber Substances 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 239000011152 fibreglass Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A zone isolating and testing apparatus comprising an isolation tool and a downhole flow control means and a method of using such apparatus is disclosed. The zone isolating and testing apparatus is particularly useful for testing zones during reverse circulation drilling using concentric drill string such as concentric drill pipe or concentric coiled tubing. The isolation tool of the zone isolating and testing apparatus comprises an expandable packer means and is adapted to connect to concentric drill string near the drilling means and be in fluid communication with the concentric drill string. The downhole flow control means of the zone isolating and testing apparatus comprises at least two valves, one for closing off the annular conduit between the inner tube and outer tube of the concentric drill string and the other for closing off the inner conduit of the inner tube. The downhole flow control means is also adapted to connect to concentric drill string near the drilling means and be in fluid communication with the concentric drill string. During testing, the isolation tool seals off the annular passage between the concentric drill string and the walls of the wellbore and the downhole flow control means seals off either the annular conduit or the inner conduit of the concentric drill string.
Claims (17)
1. An apparatus for isolating a zone in a hydrocarbon formation for testing flow of hydrocarbons, formation fluids and/or drill cuttings during vertical, horizontal or directional reverse circulation drilling of a wellbore using concentric drill string, said concentric drill string comprising an inner tube having an inner conduit and an outer tube, said inner tube being situated inside the outer tube and forming an annular conduit therebetween, comprising:
(a) an isolation tool having an expandable and contractible packer means and adapted to be operably connected to said concentric drill string such that the isolation tool is in fluid communication with both conduits; and (b) a downhole flow control means having a plurality of valve means for controlling the flow of hydrocarbons, formation fluids and drill cuttings through the annular conduit, the inner conduit or both and adapted to be operably connected to said concentric drill string such that the downhole flow control means is in fluid communication with both conduits.
(a) an isolation tool having an expandable and contractible packer means and adapted to be operably connected to said concentric drill string such that the isolation tool is in fluid communication with both conduits; and (b) a downhole flow control means having a plurality of valve means for controlling the flow of hydrocarbons, formation fluids and drill cuttings through the annular conduit, the inner conduit or both and adapted to be operably connected to said concentric drill string such that the downhole flow control means is in fluid communication with both conduits.
2. The apparatus of claim 1 wherein said concentric drill string comprises joints of concentric drill pipe.
3. The apparatus of claim 1 wherein said concentric drill string comprises concentric coiled tubing.
4. The apparatus of claim 1 wherein said downhole flow control means is operably connected to said concentric drill string below said isolation tool.
5. The apparatus of claim 1 wherein said downhole flow control means is operably connected to said concentric drill string above said isolation tool.
6. The apparatus of claim 2 wherein said isolation tool and said downhole flow control means are separated from each other by one or more joints of concentric drill pipe.
7. The apparatus of claim 1 wherein said inner tube is made of a rubber material, rubber and steel, fiberglass or other composite material and comprises electrical wires and said packer means of said isolation tool expands or contracts by means of an electric current delivered by the electrical wires of the inner tube.
8. The apparatus of claim 1 wherein said packer means comprises an inflatable ring.
9. The apparatus of claim 8 wherein said inflatable ring expands or contracts by pumping fluids into or out of the inflatable ring.
10. The apparatus of claim 1 wherein said isolation tool and said downhole flow control means are further adapted to be connected to each other.
11. A method for isolating a zone in a hydrocarbon formation for testing flow of hydrocarbons, formation fluids and/or drill cuttings during vertical, horizontal or directional reverse circulation drilling of a wellbore using concentric drill string, said concentric drill string comprising an inner tube having an inner conduit, and an outer tube, said inner tube being situated inside the outer tube and forming an annular conduit therebetween, comprising:
(a) sealing off an outside annular passage formed between a wall of said wellbore and an outer surface of said concentric drill string to form an isolated testing zone;
(b) sealing off one of said conduits of the concentric drill string;
(c) allowing hydrocarbons, formation fluids and/or drill cuttings present in said isolated testing zone to flow through the other of said conduits to the surface of said wellbore; and (d) measuring the amount of hydrocarbons, formation fluids and/or drill cuttings present in said isolated testing zone.
(a) sealing off an outside annular passage formed between a wall of said wellbore and an outer surface of said concentric drill string to form an isolated testing zone;
(b) sealing off one of said conduits of the concentric drill string;
(c) allowing hydrocarbons, formation fluids and/or drill cuttings present in said isolated testing zone to flow through the other of said conduits to the surface of said wellbore; and (d) measuring the amount of hydrocarbons, formation fluids and/or drill cuttings present in said isolated testing zone.
12. The method of claim 11 wherein the outside annular passage is sealed off by means of an isolation tool comprising an expandable and contractible packer means.
13. The method of claim 12 wherein said packer means is expanded and contracted by means of an electrical current.
14. The method of claim 12 wherein said packer means is expanded and contracted by means of addition of fluid into or removal of fluid out of the packer means.
15 15. The method of claim 11 wherein the annular conduit or inner conduit of the concentric drill string is sealed off by means of a downhole flow control means comprising a plurality of valve means.
16. The method of claim 11 wherein said concentric drill string comprises joints of concentric drill pipe.
17. The method of claim 11 wherein said concentric drill string comprises concentric coiled tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2503113A CA2503113C (en) | 2005-02-10 | 2005-04-18 | Method and apparatus for isolating and testing zones during reverse circulation drilling |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002496649A CA2496649A1 (en) | 2004-02-11 | 2005-02-10 | Method and apparatus for isolating and testing zones during reverse circulation drilling |
| CA2,496,649 | 2005-02-10 | ||
| CA2503113A CA2503113C (en) | 2005-02-10 | 2005-04-18 | Method and apparatus for isolating and testing zones during reverse circulation drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2503113A1 true CA2503113A1 (en) | 2006-08-10 |
| CA2503113C CA2503113C (en) | 2012-03-20 |
Family
ID=36791486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2503113A Active CA2503113C (en) | 2005-02-10 | 2005-04-18 | Method and apparatus for isolating and testing zones during reverse circulation drilling |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2503113C (en) |
-
2005
- 2005-04-18 CA CA2503113A patent/CA2503113C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2503113C (en) | 2012-03-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |