WO2003069114A1 - Casing reaming assembly - Google Patents
Casing reaming assembly Download PDFInfo
- Publication number
- WO2003069114A1 WO2003069114A1 PCT/GB2003/000666 GB0300666W WO03069114A1 WO 2003069114 A1 WO2003069114 A1 WO 2003069114A1 GB 0300666 W GB0300666 W GB 0300666W WO 03069114 A1 WO03069114 A1 WO 03069114A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- assembly
- collar
- casing
- borehole
- drilling
- Prior art date
Links
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 9
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 238000005755 formation reaction Methods 0.000 description 6
- 238000003801 milling Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B7/06—Deflecting the direction of boreholes
- E21B7/067—Deflecting the direction of boreholes with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub
Definitions
- the present invention relates to a method for drilling out of a casing string which has been run and fixed in place with the use of a sacrificial motor assembly.
- a method for drilling out from a casing string in a borehole comprising the steps of: introducing a reaming assembly into the borehole to a predetermined location; fixing the reaming assembly in position, wherein a drillable collar is attached between the reaming assembly and a casing ; introducing a drilling assembly into the casing; and positioning the drilling assembly so as to drill through the drillable collar at a predetermined angle into the formation surrounding the borehole.
- the drilling assembly is a bent housing motor assembly with a drill bit.
- the drill bit used comprises a PDC drill bit.
- the reaming assembly is fixed in place using cement.
- an apparatus for drilling out from a casing string in a borehole comprising a drillable collar attached between a reaming assembly and a casing string.
- the drillable collar is provided with a borehole extending from the reaming assembly to the casing string.
- the drillable collar is made from aluminium, or other high strength but easily drillable material .
- Aluminium is preferred because it is drillable and sufficiently robust to retain its integrity in the conditions found in boreholes .
- Other materials with similar properties may be used in place of aluminium.
- Fig. 1 shows a casing reaming assembly in accordance with the present invention
- Fig.2 is a cross sectional view of a drillable collar
- Fig. 3 shows the effect of a change in width of the collar.
- the assembly 1 is shown with respect to the base of an unstable subsea formation 15.
- the assembly 1 comprises a casing 3 which in this example is of 9 5/8 inch diameter connected to a float collar 5 which is in turn connected to a drillable collar 7.
- the drillable collar 7 is connected to a reaming assembly 10 which consists of a mud motor 9 having, on its end, a 12% inch bit 11.
- Figure 1 also shows a side-tracked hole 13, which is created by the use of a drilling assembly (not shown) capable of drilling through the drillable collar 7.
- a drilling assembly (not shown) capable of drilling through the drillable collar 7.
- a borehole is drilled to a casing point to provide a 12% inch diameter hole. This drilling assembly is then removed from the borehole .
- a reaming assembly also known as a sacrificial reaming assembly is constructed.
- This consists of a reaming assembly as shown having a mud motor with a 12% inch drill bit connected to its end.
- This reaming assembly is connected to the drillable collar 7.
- the drillable collar is made from aluminium and has an outer diameter of 9% inch and an inner diameter of 3 inches. Therefore the annular thickness of the drill collar is 3% inches.
- the collar 7 is connected to a float collar 5, which is in turn connected to the casing 3.
- the reaming assembly 10 and casing 3 are then run into the bore hole until the bottom of the casing 3 and the drill collar 7 are set in an appropriate formation.
- cement is added in order to complete the casing and reaming assembly in place and to land the cement plug in the float collar.
- the collar is 40 feet in length.
- the bore 8 contained in the collar provides a passage to allow the addition of cement in order to cement the casing string in place.
- the collar 7 serves as a hard plug to enable the steerable motor assembly of the second drill to deviate in the direction of the next well path into new formation.
- a drill collar may be made of any other material that is drillable and mechanically robust enough to perform the functions of the collar described in the conditions typically found in a bore hole.
- this shows the variation in exit point of the drill that may be achieved simply by varying the annual thickness of the collar 7.
- Figure 2 shows the exit point from the drillable collar where an 8 inch collar 7 is used in comparison to the exit point where a B X A inch collar is used. This clearly shows that the exit point for the 9% inch collar is displaced.
- the present invention contains a number of advantages with respect to the prior art. In particular: it reduces the number of round trips from the surface required, therefore reducing the amount of rig time required; a whipstock is not required, these cost around réelle0000 to buy and take a significant time to orient; and the cost and time of milling a window is removed from the process.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/504,882 US20060016603A1 (en) | 2002-02-15 | 2003-02-14 | Casing reaming assembly |
CA002476459A CA2476459A1 (en) | 2002-02-15 | 2003-02-14 | Casing reaming assembly |
EP03704791A EP1474589A1 (en) | 2002-02-15 | 2003-02-14 | Casing reaming assembly |
AU2003207319A AU2003207319A1 (en) | 2002-02-15 | 2003-02-14 | Casing reaming assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0203641A GB2385341B (en) | 2002-02-15 | 2002-02-15 | Casing reaming assembly |
GB0203641.6 | 2002-02-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003069114A1 true WO2003069114A1 (en) | 2003-08-21 |
Family
ID=9931167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2003/000666 WO2003069114A1 (en) | 2002-02-15 | 2003-02-14 | Casing reaming assembly |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060016603A1 (en) |
EP (1) | EP1474589A1 (en) |
AU (1) | AU2003207319A1 (en) |
CA (1) | CA2476459A1 (en) |
GB (1) | GB2385341B (en) |
WO (1) | WO2003069114A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7370703B2 (en) * | 2005-12-09 | 2008-05-13 | Baker Hughes Incorporated | Downhole hydraulic pipe cutter |
US7478982B2 (en) * | 2006-10-24 | 2009-01-20 | Baker Hughes, Incorporated | Tubular cutting device |
US9010446B2 (en) | 2011-02-21 | 2015-04-21 | Baker Hughes Incorporated | Downhole clamping mechanism |
CN111550184A (en) * | 2020-04-29 | 2020-08-18 | 中石化石油工程技术服务有限公司 | Ultra-deep horizontal well borehole orbit design method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2297029A (en) * | 1940-01-02 | 1942-09-29 | Lane Wells Co | Whipstocking sleeve for drillable liners |
US5887668A (en) * | 1993-09-10 | 1999-03-30 | Weatherford/Lamb, Inc. | Wellbore milling-- drilling |
US6065209A (en) * | 1997-05-23 | 2000-05-23 | S-Cal Research Corp. | Method of fabrication, tooling and installation of downhole sealed casing connectors for drilling and completion of multi-lateral wells |
US6267179B1 (en) * | 1999-04-16 | 2001-07-31 | Schlumberger Technology Corporation | Method and apparatus for accurate milling of windows in well casings |
US20010035302A1 (en) * | 1998-03-13 | 2001-11-01 | Desai Praful C | Method for milling casing and drilling formation |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2173035A (en) * | 1938-02-16 | 1939-09-12 | Security Engineering Co Inc | Method of sidetracking wells |
DE4395361T1 (en) * | 1992-10-19 | 1994-11-10 | Baker Hughes Inc | Removable wedge system |
US5887655A (en) * | 1993-09-10 | 1999-03-30 | Weatherford/Lamb, Inc | Wellbore milling and drilling |
GB2306985B (en) * | 1995-11-07 | 1999-06-02 | Hector Filippus Alexand Susman | Improvements in milling |
US6648068B2 (en) * | 1996-05-03 | 2003-11-18 | Smith International, Inc. | One-trip milling system |
US6028023A (en) * | 1997-10-20 | 2000-02-22 | Bulldog Technologies U.S.A., Inc. | Process for making, and use of, anionic clay materials |
US6209645B1 (en) * | 1999-04-16 | 2001-04-03 | Schlumberger Technology Corporation | Method and apparatus for accurate milling of windows in well casings |
US6732802B2 (en) * | 2002-03-21 | 2004-05-11 | Halliburton Energy Services, Inc. | Isolation bypass joint system and completion method for a multilateral well |
US7369959B2 (en) * | 2002-11-26 | 2008-05-06 | Intercat Equipment, Inc. | Fluid catalytic cracking catalyst injection system and method for communicating with same |
US7364708B2 (en) * | 2003-11-19 | 2008-04-29 | Intercat Equipment, Inc. | Multi-catalyst injection system |
US7431825B2 (en) * | 2003-12-05 | 2008-10-07 | Intercat, Inc. | Gasoline sulfur reduction using hydrotalcite like compounds |
CA2548500C (en) * | 2003-12-05 | 2010-01-12 | Intercat, Inc. | Mixed metal oxide sorbents |
-
2002
- 2002-02-15 GB GB0203641A patent/GB2385341B/en not_active Expired - Fee Related
-
2003
- 2003-02-14 CA CA002476459A patent/CA2476459A1/en not_active Abandoned
- 2003-02-14 WO PCT/GB2003/000666 patent/WO2003069114A1/en not_active Application Discontinuation
- 2003-02-14 EP EP03704791A patent/EP1474589A1/en not_active Withdrawn
- 2003-02-14 US US10/504,882 patent/US20060016603A1/en not_active Abandoned
- 2003-02-14 AU AU2003207319A patent/AU2003207319A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2297029A (en) * | 1940-01-02 | 1942-09-29 | Lane Wells Co | Whipstocking sleeve for drillable liners |
US5887668A (en) * | 1993-09-10 | 1999-03-30 | Weatherford/Lamb, Inc. | Wellbore milling-- drilling |
US6065209A (en) * | 1997-05-23 | 2000-05-23 | S-Cal Research Corp. | Method of fabrication, tooling and installation of downhole sealed casing connectors for drilling and completion of multi-lateral wells |
US20010035302A1 (en) * | 1998-03-13 | 2001-11-01 | Desai Praful C | Method for milling casing and drilling formation |
US6267179B1 (en) * | 1999-04-16 | 2001-07-31 | Schlumberger Technology Corporation | Method and apparatus for accurate milling of windows in well casings |
Also Published As
Publication number | Publication date |
---|---|
GB2385341B (en) | 2005-12-21 |
EP1474589A1 (en) | 2004-11-10 |
US20060016603A1 (en) | 2006-01-26 |
GB2385341A (en) | 2003-08-20 |
CA2476459A1 (en) | 2003-08-21 |
GB0203641D0 (en) | 2002-04-03 |
AU2003207319A1 (en) | 2003-09-04 |
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