WO2013187902A1 - Method for making windows in oil well casing - Google Patents
Method for making windows in oil well casing Download PDFInfo
- Publication number
- WO2013187902A1 WO2013187902A1 PCT/US2012/042472 US2012042472W WO2013187902A1 WO 2013187902 A1 WO2013187902 A1 WO 2013187902A1 US 2012042472 W US2012042472 W US 2012042472W WO 2013187902 A1 WO2013187902 A1 WO 2013187902A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casing
- gravel
- screen
- bore
- adjacent
- Prior art date
Links
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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
-
- 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
- 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
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
-
- 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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Definitions
- the present invention relates to a method for making gravel filters in oil well bores, particularly in those oil well bores where there are water veins near oil producing formations.
- Figure 1 represents an elevational cross-sectional view of an oil well bore B with a new (unused) casing 20 and a cemented bottom. A producing formation and a water vein above it are also represented to show typical characteristics in an oil well.
- Figure 2 shows an elevational representation similar to the one shown in the previous figure with a section mill tool positioned to start cutting through the casing.
- Figure 3 illustrates another elevational view similar to the previous figures with the blades cutting through the casing.
- Figure 4 is a representation of an elevational view of the well's bore with the tool section milling the casing.
- Figure 5 shows a cross-sectional view of the well's bore except for the underreamer tool for which the cross-section is not shown.
- the underreamer is shown enlarging the bore in a predetermined location.
- Figure 6 shows an elevational view of the well's bore with a tool forming a gravel-packed filter between the enlarged portion of the bore and the casing.
- Figure 7 represents another elevational view of the well's bore shown in the previous figures with a producing tube in place that includes a screen through which the filtered sand with oil is passed.
- Figure 8 shows an elevational view of a conventional oil well as it exists in the prior art.
- Figure 9 is a partial cross-sectional representation of setting tool 50 taken along line 9-9 in figure 6.
- Figure 10 is a cross-sectional view of setting tool 50 taken along line 10- 10 in figure 6.
- EMBODIMENT [013] Referring now to the drawings, where the present invention is generally referred to with numeral 10, it can be observed that it basically includes casing 20 that extends coaxially inside bore B that includes a cemented bottom b, as it is typically found in new oil well installations. Bore B typically passes through water formations W and oil producing formations O. The space S between casing 20 and bore B is typically cemented to keep casing 20 in place. The lowermost end 22 of casing 20 is typically brought against bottom b. Several tools are then inserted in casing 20 and lowered to the required
- the explosives used penetrate through cemented space S.
- the present invention can also be used to repair these conventional operating oil well installations.
- the first step in the present method is to ascertain the location where the window for the filter is to be made or where the repair is to take place.
- a section milling tool is lowered to that location and casing 20 is cut, creating an interruption.
- the cutting takes place with precision that is not possible with the gunning method. In this manner, a user can avoid water formations W.
- Casing 20 is kept in place since the annular space between casing 20 and the surface of bore B has been cemented, as it is conventionally done in the industry.
- a section milling tool like the one described in U.S.
- patent No. 6,920,923 can be used to perform this function.
- a section milling tool is used to cut casing 20 and concentrates its blades' action on this
- the next step, after withdrawing the section milling tool 30, is the lowering of the underreamer 40 to the location where the window was formed.
- An underreamer like the one described in Applicant's U.S. patent No.
- the underreamer enlarges the diameter of the bore at a location adjacent to where window 25 was formed as it can be seen in figure 5.
- a setting tool 50 is lowered and a mix of gravel and a fluid is pumped radially through openings 53a and 53b, as seen in figure 6.
- the fluid can be water or other suitable liquid conventionally used to carry granular material, such as gravel, in oil well installations.
- Gravel G and fluid (not shown) are delivered downwardly through tube 52, as best seen in figure 9.
- Tube 52 is bifurcated, in the embodiment shown in figures 9 through 10, with inclined tubes 52a and 52b extending radially outwardly with respective openings 53a and 53b. Openings 53a and 53b are positioned in setting tool 50 above screen 62 when the former is operationally engaged to producing tube 60.
- the lower surfaces 55a and 55b are reinforced with thicker walls to withstand the abrasive action of the gravel and fluid. Sealing units 61 are not deployed when gravel G is delivered from above screen 62 and passes between screen 62 and casing 20.
- Producing tube 60 includes a screen 62 with through holes 64
- One of the advantages of the present method for creating a gravel filter is its precision.
- a user can control the dimensions of the window or windows to be built in casing 20.
- the range of the sizes of the gravel is maximized, providing more flexibility to the user.
- the present methods for building gravel filters involve gunning a portion of casing 20 with unpredictable locations and dimensions for the holes.
- the use of the present method permits a user to build filters that are more reliable and track the intended specifications.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2012/042472 WO2013187902A1 (en) | 2012-06-14 | 2012-06-14 | Method for making windows in oil well casing |
MX2014015080A MX2014015080A (en) | 2012-06-14 | 2012-06-14 | Method for making windows in oil well casing. |
BR112014031065A BR112014031065A2 (en) | 2012-06-14 | 2012-06-14 | method for making windows in oil well casing. |
CA2876994A CA2876994C (en) | 2012-06-14 | 2012-06-14 | Method for making windows in oil well casing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2012/042472 WO2013187902A1 (en) | 2012-06-14 | 2012-06-14 | Method for making windows in oil well casing |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013187902A1 true WO2013187902A1 (en) | 2013-12-19 |
Family
ID=49758572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2012/042472 WO2013187902A1 (en) | 2012-06-14 | 2012-06-14 | Method for making windows in oil well casing |
Country Status (4)
Country | Link |
---|---|
BR (1) | BR112014031065A2 (en) |
CA (1) | CA2876994C (en) |
MX (1) | MX2014015080A (en) |
WO (1) | WO2013187902A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10030459B2 (en) | 2014-07-08 | 2018-07-24 | Smith International, Inc. | Thru-casing milling |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5255741A (en) * | 1991-12-11 | 1993-10-26 | Mobil Oil Corporation | Process and apparatus for completing a well in an unconsolidated formation |
US7363974B2 (en) * | 2003-09-03 | 2008-04-29 | Schlumberger Technology Corporation | Gravel packing a well |
US20110017450A1 (en) * | 2009-07-23 | 2011-01-27 | Alejandro Pietrobelli | Method for making gravel filters in oil wells |
US8225870B1 (en) * | 2009-07-23 | 2012-07-24 | Mecol Holding, LLC | Method for making windows in oil well casings |
-
2012
- 2012-06-14 WO PCT/US2012/042472 patent/WO2013187902A1/en active Application Filing
- 2012-06-14 BR BR112014031065A patent/BR112014031065A2/en not_active IP Right Cessation
- 2012-06-14 CA CA2876994A patent/CA2876994C/en not_active Expired - Fee Related
- 2012-06-14 MX MX2014015080A patent/MX2014015080A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5255741A (en) * | 1991-12-11 | 1993-10-26 | Mobil Oil Corporation | Process and apparatus for completing a well in an unconsolidated formation |
US7363974B2 (en) * | 2003-09-03 | 2008-04-29 | Schlumberger Technology Corporation | Gravel packing a well |
US20110017450A1 (en) * | 2009-07-23 | 2011-01-27 | Alejandro Pietrobelli | Method for making gravel filters in oil wells |
US8225870B1 (en) * | 2009-07-23 | 2012-07-24 | Mecol Holding, LLC | Method for making windows in oil well casings |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10030459B2 (en) | 2014-07-08 | 2018-07-24 | Smith International, Inc. | Thru-casing milling |
Also Published As
Publication number | Publication date |
---|---|
CA2876994A1 (en) | 2013-12-19 |
CA2876994C (en) | 2017-05-30 |
BR112014031065A2 (en) | 2018-06-26 |
MX2014015080A (en) | 2015-07-06 |
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