US20130199858A1 - Keyseat Wiper - Google Patents
Keyseat Wiper Download PDFInfo
- Publication number
- US20130199858A1 US20130199858A1 US13/683,844 US201213683844A US2013199858A1 US 20130199858 A1 US20130199858 A1 US 20130199858A1 US 201213683844 A US201213683844 A US 201213683844A US 2013199858 A1 US2013199858 A1 US 2013199858A1
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- US
- United States
- Prior art keywords
- keyseat
- section
- wiper
- wipers
- cross
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 abstract description 19
- 238000005553 drilling Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 14
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Definitions
- This application relates generally to tools for drill strings and methods of making and using such tools.
- this application relates to keyseat wipers for use with drill rods that are used in exploratory and production drilling, as well as methods for making and using such keyseat wipers.
- an open-faced drill bit is attached to a drill string, which is a series of connected drill rods and tools that are assembled section by section as the drill string moves deeper into a formation during a drilling operation.
- the drill string sometimes deviates from directly vertical, making at slightly arced path through the formation being drilled.
- withdrawing a drill string from the borehole can be problematic as the drill string can bind against the curved wall of the bore hole.
- the pipe connections of the drill string being wider at the connections than the pipe lengths, tends to dig into the side wall of the borehole creating what is known as a keyseat.
- Embodiments of keyseat wipers for use in drilling processes, as well as methods for making and using such keyseat wipers, are described herein.
- Embodiments of keyseat wipers can include changing cross-sections and a relief sections that permit cut materials to pass by the keyseat wipers, reducing the possibility of a drill string with keyseat wipers from binding in a curved hole when being retrieved.
- a keyseat wiper for placement in a drill string may include a first tapered section tapering from a first diameter to a second larger diameter; a wiper section having the second larger diameter; a second tapered section tapering from the second larger diameter to the first diameter; and a reduced section in the wiper section, the reduced section having a diameter smaller than the second larger diameter.
- the first tapered section and the second tapered section may each include flutes, the flutes of the first tapered section being rotationally offset from the flutes of the second tapered section.
- the keyseat wiper may further include at least one outside reduced section located adjacent to the first diameter of the first tapered section
- FIG. 1 illustrates an exemplary, side view of a keyseat wiper tool
- FIG. 2 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool
- FIG. 3 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool
- FIG. 4 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool
- FIG. 5 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool
- FIG. 6 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool
- FIG. 7 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool.
- the apparatus and associated methods of using the apparatus can be implemented and used without employing these specific details. Indeed, the apparatus and associated methods can be placed into practice by modifying the illustrated apparatus and associated methods and can be used in conjunction with any other apparatus and techniques conventionally used in the industry. For example, while the description below includes examples of rotary drilling, the apparatus and associated methods could be equally applied in other drilling process, such as core drilling, percussive drilling, and exploratory drilling, as well as other drilling procedures and systems. Indeed, the apparatus and associated methods could be used in any type of drilling process where a drill string may alter to a curved or arced borehole.
- drill rod will be taken to include all forms of elongate members used in the drilling, installation and maintenance of bore holes and wells in the ground and will include rods, pipes, tubes and casings which are provided in lengths and are interconnected to be used in a borehole.
- the drill string keyseat wiper tools described in this application can have any configuration consistent with their operation described herein.
- One exemplary configuration of a keyseat wiper tool is illustrated in the Figures.
- the keyseat wiper tool is designed such that different cross sectional configurations cut and create passageways for a drill string to be withdrawn from an arced borehole.
- relief sections may be provided with a narrower cross-sectional thickness to permit material cut by the keyseat wiper tool to aggregate and then fall past the relief sections down the borehole, solving the problems of conventional keyseat wipers.
- cross section B may be similar to F
- cross section A may be similar to cross section E
- cross section C may be similar to cross section D.
- the similar cross sections may be rotated with respect to each other to allow cut materials to pass to the bottom of the borehole.
- the features of cross section B are rotated by 45 degrees with respect to the similar features of cross section F.
- cross sections B and A, and F and E may be tapered to provide a sloped engagement to reduce the amount of cutting that the keyseat wiper would have to perform.
- the taper alone may help force the drill string into the correct alignment with the borehole in harder substrate materials, reducing the amount of time and energy required to withdraw the drill string from the borehole.
- cross sections C and D have a larger diameter than cross sections B and F.
- the tapered sections between cross section B and A and between cross sections F and E include multiple cutting teeth to remove materials from the sidewall.
- Cross sections C and D include flutes to permit cut material to move along the keyseat wiper. Because of the rotated features, the flutes of cross sections C and D may be deeper since an extended portion of cross sections C or D would always be in contact with the side wall of the borehole.
- the diameter of cross sections D and C may be about the same as the diameter of the borehole.
- the keyseat wiper tool may serve to effectively guide the drill string out of the borehole without unnecessary cutting by the keyseat wiper.
- a reduced portion may be provided on one or both ends of the tool outside of the tapered section between cross sections B and F.
- the reduced portion may help cut materials to pass by the tool.
- a reduced section may be included that allows cut materials collecting in the flutes of cross sections D and C to loosen and pass along the tool, thus overcoming the problems of compacted cut materials that tend to bind prior art reamers and keyseat wipers.
- Various surfaces of the different features of the illustrated cross sections may include an abrasive coating, or may be formed from a material for cutting (such as cut-rite) for assisting in cutting the materials away from the keyseat.
- the extended portions of the flutes in cross sections D and C may be replaceable through a variety of known methods of replacing tool parts.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Embodiments of keyseat wipers for use in drilling processes, as well as methods for making and using such keyseat wipers, are described herein. Embodiments of keyseat wipers can include changing cross-sections and a relief sections that permit cut materials to pass by the keyseat wipers, reducing the possibility of a drill string with keyseat wipers from binding in a curved hole when being retrieved.
Description
- This application claims the benefit of U.S. Provisional Patent Application No. 61/562,272 filed on Nov. 21, 2011, entitled KEYSEAT WIPER, which is incorporated herein by reference in its entirety.
- This application relates generally to tools for drill strings and methods of making and using such tools. In particular, this application relates to keyseat wipers for use with drill rods that are used in exploratory and production drilling, as well as methods for making and using such keyseat wipers.
- In a conventional process used in drilling, an open-faced drill bit is attached to a drill string, which is a series of connected
- In a conventional process used in drilling, an open-faced drill bit is attached to a drill string, which is a series of connected drill rods and tools that are assembled section by section as the drill string moves deeper into a formation during a drilling operation. During drilling operations, the drill string sometimes deviates from directly vertical, making at slightly arced path through the formation being drilled. In such cases, withdrawing a drill string from the borehole can be problematic as the drill string can bind against the curved wall of the bore hole. In particular, the pipe connections of the drill string, being wider at the connections than the pipe lengths, tends to dig into the side wall of the borehole creating what is known as a keyseat.
- In addition to the keyseats, attempts to work the drill string lose can case the borehole to deform and even collapse, causing additional problems with the drilling. In extreme circumstances, portions of the drill string may be damaged or destroyed while being withdrawn from the borehole.
- Some prior art has identified this problem and have provided keyseat reamers that encourage the drill string to exit the borehole without binding against the inner walls by cutting the keyseat to the width of the pipe connections. U.S. Pat. No. 4,330,043 includes a detailed description of the problem caused by keyseat formation and proposes a solution. However, the solution of the '043 patent suffers from cut materials collecting in the flutes and binding the tool in the borehole as the excess cut materials have no way of passing by the keyseat wiper or being removed.
- Embodiments of keyseat wipers for use in drilling processes, as well as methods for making and using such keyseat wipers, are described herein. Embodiments of keyseat wipers can include changing cross-sections and a relief sections that permit cut materials to pass by the keyseat wipers, reducing the possibility of a drill string with keyseat wipers from binding in a curved hole when being retrieved.
- In some embodiments, a keyseat wiper for placement in a drill string may include a first tapered section tapering from a first diameter to a second larger diameter; a wiper section having the second larger diameter; a second tapered section tapering from the second larger diameter to the first diameter; and a reduced section in the wiper section, the reduced section having a diameter smaller than the second larger diameter. In other embodiments, the first tapered section and the second tapered section may each include flutes, the flutes of the first tapered section being rotationally offset from the flutes of the second tapered section. In other embodiments, the keyseat wiper may further include at least one outside reduced section located adjacent to the first diameter of the first tapered section
- The following description can be better understood in light of Figures, in which:
-
FIG. 1 illustrates an exemplary, side view of a keyseat wiper tool; -
FIG. 2 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool; -
FIG. 3 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool; -
FIG. 4 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool; -
FIG. 5 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool; -
FIG. 6 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool; and -
FIG. 7 illustrates a cross-sectional view of a section of an exemplary keyseat wiper tool. - Together with the following description, the Figures demonstrate and explain the principles of the keyseat wiper tools and methods for using the keyseat wiper tools. In the Figures, the thickness and configuration of components may be exaggerated for clarity. The same reference numerals in different Figures represent the same component.
- The following description supplies specific details in order to provide a thorough understanding.
- Nevertheless, the skilled artisan would understand that the apparatus and associated methods of using the apparatus can be implemented and used without employing these specific details. Indeed, the apparatus and associated methods can be placed into practice by modifying the illustrated apparatus and associated methods and can be used in conjunction with any other apparatus and techniques conventionally used in the industry. For example, while the description below includes examples of rotary drilling, the apparatus and associated methods could be equally applied in other drilling process, such as core drilling, percussive drilling, and exploratory drilling, as well as other drilling procedures and systems. Indeed, the apparatus and associated methods could be used in any type of drilling process where a drill string may alter to a curved or arced borehole. And the term “drill rod” will be taken to include all forms of elongate members used in the drilling, installation and maintenance of bore holes and wells in the ground and will include rods, pipes, tubes and casings which are provided in lengths and are interconnected to be used in a borehole.
- The drill string keyseat wiper tools described in this application can have any configuration consistent with their operation described herein. One exemplary configuration of a keyseat wiper tool is illustrated in the Figures. The keyseat wiper tool is designed such that different cross sectional configurations cut and create passageways for a drill string to be withdrawn from an arced borehole. In some embodiments, relief sections may be provided with a narrower cross-sectional thickness to permit material cut by the keyseat wiper tool to aggregate and then fall past the relief sections down the borehole, solving the problems of conventional keyseat wipers.
- Different cutting sections are illustrated in the Figures. It should be understood that the different cross sectional views may transition into each other. As can be seen, different ends of the cutting section between sections B and F may be generally symmetric. For example, cross section B may be similar to F, cross section A may be similar to cross section E, and cross section C may be similar to cross section D. The similar cross sections, however, may be rotated with respect to each other to allow cut materials to pass to the bottom of the borehole. For example, in the Figures, the features of cross section B are rotated by 45 degrees with respect to the similar features of cross section F.
- The transition between cross sections B and A, and F and E, may be tapered to provide a sloped engagement to reduce the amount of cutting that the keyseat wiper would have to perform. The taper alone may help force the drill string into the correct alignment with the borehole in harder substrate materials, reducing the amount of time and energy required to withdraw the drill string from the borehole. Thus, cross sections C and D have a larger diameter than cross sections B and F.
- As shown in the Figures, the tapered sections between cross section B and A and between cross sections F and E include multiple cutting teeth to remove materials from the sidewall. Cross sections C and D include flutes to permit cut material to move along the keyseat wiper. Because of the rotated features, the flutes of cross sections C and D may be deeper since an extended portion of cross sections C or D would always be in contact with the side wall of the borehole.
- The diameter of cross sections D and C may be about the same as the diameter of the borehole. When the diameter of cross sections D and C are about the same as the diameter of the borehole, the keyseat wiper tool may serve to effectively guide the drill string out of the borehole without unnecessary cutting by the keyseat wiper.
- A reduced portion may be provided on one or both ends of the tool outside of the tapered section between cross sections B and F. The reduced portion may help cut materials to pass by the tool. Similarly, between cross sections D and C, a reduced section may be included that allows cut materials collecting in the flutes of cross sections D and C to loosen and pass along the tool, thus overcoming the problems of compacted cut materials that tend to bind prior art reamers and keyseat wipers.
- Various surfaces of the different features of the illustrated cross sections may include an abrasive coating, or may be formed from a material for cutting (such as cut-rite) for assisting in cutting the materials away from the keyseat. Similarly, in some embodiments, As shown in
FIG. 4 , the extended portions of the flutes in cross sections D and C may be replaceable through a variety of known methods of replacing tool parts. - In addition to any previously indicated modification, numerous other variations and alternative arrangements may be devised by those skilled in the art without departing from the spirit and scope of this description, and any claims are intended to cover such modifications and arrangements. Thus, while the information has been described above with particularity and detail in connection with what is presently deemed to be the most practical and preferred aspects, it will be apparent to those of ordinary skill in the art that numerous modifications, including, but not limited to, form, function, manner of operation and use may be made without departing from the principles and concepts set forth herein. Also, as used herein, examples are meant to be illustrative only and should not be construed to be limiting in any manner.
Claims (3)
1. A keyseat wiper for placement in a drill string, the keyseat wiper comprising:
a first tapered section tapering from a first diameter to a second larger diameter;
a wiper section having the second larger diameter;
a second tapered section tapering from the second larger diameter to the first diameter; and
a reduced section in the wiper section, the reduced section having a diameter smaller than the second larger diameter.
2. The keyseat wiper of claim 1 , wherein the first tapered section and the second tapered section each include flutes, the flutes of the first tapered section being rotationally offset from the flutes of the second tapered section.
3. The keyseat wiper of claim 1 , further comprising at least one outside reduced section located adjacent to the first diameter of the first tapered section.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/683,844 US20130199858A1 (en) | 2011-11-21 | 2012-11-21 | Keyseat Wiper |
US13/692,901 US9297208B2 (en) | 2011-11-21 | 2012-12-03 | Ball and socket roller reamer and keyseat wiper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161562272P | 2011-11-21 | 2011-11-21 | |
US13/683,844 US20130199858A1 (en) | 2011-11-21 | 2012-11-21 | Keyseat Wiper |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US201161562272P Continuation | 2011-11-21 | 2011-11-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/692,901 Continuation-In-Part US9297208B2 (en) | 2011-11-21 | 2012-12-03 | Ball and socket roller reamer and keyseat wiper |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130199858A1 true US20130199858A1 (en) | 2013-08-08 |
Family
ID=48901914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/683,844 Abandoned US20130199858A1 (en) | 2011-11-21 | 2012-11-21 | Keyseat Wiper |
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US (1) | US20130199858A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130126244A1 (en) * | 2011-11-21 | 2013-05-23 | Sheldon Hansen | Ball and socket roller reamer and keyseat wiper |
Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1664283A (en) * | 1924-02-05 | 1928-03-27 | Boynton Alexander | Combination washing tool and swab |
US1844371A (en) * | 1930-02-24 | 1932-02-09 | Grant John | Hole reaming and straightening device |
US2079449A (en) * | 1936-03-28 | 1937-05-04 | Ralph E Gilchrist | Well drilling rig attachment |
US2821363A (en) * | 1953-12-07 | 1958-01-28 | Servco Engineering Ltd | Key seat cutter |
US2904313A (en) * | 1957-03-12 | 1959-09-15 | Lorenzer D V Wisenbaker | Key-seat reamer |
US3420323A (en) * | 1967-02-23 | 1969-01-07 | Land & Marine Rental Co | Drill stabilizer tool |
US3431990A (en) * | 1967-02-02 | 1969-03-11 | Houston Eng Inc | Keyseat wiper |
US3642079A (en) * | 1970-06-23 | 1972-02-15 | Servco Co | Multisleeve stabilizer |
US3747700A (en) * | 1971-10-26 | 1973-07-24 | Midway Fishing Tool Co | Oil well mandrel and stabilizing sleeve assembly |
US3916998A (en) * | 1974-11-05 | 1975-11-04 | Jr Samuel L Bass | Drilling stabilizer and method |
US4330043A (en) * | 1980-10-22 | 1982-05-18 | Drill Services, Inc. | Keyseat wiper |
US4479538A (en) * | 1981-06-22 | 1984-10-30 | Bilco Tools, Inc. | Casing scraper and method for making the same |
US4664206A (en) * | 1985-09-23 | 1987-05-12 | Gulf Canada Corporation | Stabilizer for drillstems |
US6223840B1 (en) * | 1997-06-18 | 2001-05-01 | George Swietlik | Cutting bed impeller |
US20040060699A1 (en) * | 2000-12-19 | 2004-04-01 | Gholam Rastegar | Torque reducing tubing component |
US20040195009A1 (en) * | 2003-02-20 | 2004-10-07 | S.M.F. International | Drill string element having at least one bearing zone, a drill string, and a tool joint |
US20100326738A1 (en) * | 2008-02-21 | 2010-12-30 | Vam Drilling France | Drill packer member, drill pipe, and corresponding drill pipe string |
US7954566B2 (en) * | 2006-06-22 | 2011-06-07 | Boart Longyear Global Holdco Inc. | Stabilizer for drill strings |
US8336645B2 (en) * | 2009-08-28 | 2012-12-25 | Arrival Oil Tools, Inc. | Drilling cuttings mobilizer and method for use |
US20130126244A1 (en) * | 2011-11-21 | 2013-05-23 | Sheldon Hansen | Ball and socket roller reamer and keyseat wiper |
US8607900B1 (en) * | 2012-08-27 | 2013-12-17 | LB Enterprises, LLC | Downhole tool engaging a tubing string between a drill bit and tubular for reaming a wellbore |
-
2012
- 2012-11-21 US US13/683,844 patent/US20130199858A1/en not_active Abandoned
Patent Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1664283A (en) * | 1924-02-05 | 1928-03-27 | Boynton Alexander | Combination washing tool and swab |
US1844371A (en) * | 1930-02-24 | 1932-02-09 | Grant John | Hole reaming and straightening device |
US2079449A (en) * | 1936-03-28 | 1937-05-04 | Ralph E Gilchrist | Well drilling rig attachment |
US2821363A (en) * | 1953-12-07 | 1958-01-28 | Servco Engineering Ltd | Key seat cutter |
US2904313A (en) * | 1957-03-12 | 1959-09-15 | Lorenzer D V Wisenbaker | Key-seat reamer |
US3431990A (en) * | 1967-02-02 | 1969-03-11 | Houston Eng Inc | Keyseat wiper |
US3420323A (en) * | 1967-02-23 | 1969-01-07 | Land & Marine Rental Co | Drill stabilizer tool |
US3642079A (en) * | 1970-06-23 | 1972-02-15 | Servco Co | Multisleeve stabilizer |
US3747700A (en) * | 1971-10-26 | 1973-07-24 | Midway Fishing Tool Co | Oil well mandrel and stabilizing sleeve assembly |
US3916998A (en) * | 1974-11-05 | 1975-11-04 | Jr Samuel L Bass | Drilling stabilizer and method |
US4330043A (en) * | 1980-10-22 | 1982-05-18 | Drill Services, Inc. | Keyseat wiper |
US4479538A (en) * | 1981-06-22 | 1984-10-30 | Bilco Tools, Inc. | Casing scraper and method for making the same |
US4664206A (en) * | 1985-09-23 | 1987-05-12 | Gulf Canada Corporation | Stabilizer for drillstems |
US6223840B1 (en) * | 1997-06-18 | 2001-05-01 | George Swietlik | Cutting bed impeller |
US20040060699A1 (en) * | 2000-12-19 | 2004-04-01 | Gholam Rastegar | Torque reducing tubing component |
US20040195009A1 (en) * | 2003-02-20 | 2004-10-07 | S.M.F. International | Drill string element having at least one bearing zone, a drill string, and a tool joint |
US7954566B2 (en) * | 2006-06-22 | 2011-06-07 | Boart Longyear Global Holdco Inc. | Stabilizer for drill strings |
US20100326738A1 (en) * | 2008-02-21 | 2010-12-30 | Vam Drilling France | Drill packer member, drill pipe, and corresponding drill pipe string |
US8336645B2 (en) * | 2009-08-28 | 2012-12-25 | Arrival Oil Tools, Inc. | Drilling cuttings mobilizer and method for use |
US20130126244A1 (en) * | 2011-11-21 | 2013-05-23 | Sheldon Hansen | Ball and socket roller reamer and keyseat wiper |
US8607900B1 (en) * | 2012-08-27 | 2013-12-17 | LB Enterprises, LLC | Downhole tool engaging a tubing string between a drill bit and tubular for reaming a wellbore |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130126244A1 (en) * | 2011-11-21 | 2013-05-23 | Sheldon Hansen | Ball and socket roller reamer and keyseat wiper |
US9297208B2 (en) * | 2011-11-21 | 2016-03-29 | Utah Valley University | Ball and socket roller reamer and keyseat wiper |
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Legal Events
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---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |