US3659882A - Nonmagnetic corrosion-resistant drill string members - Google Patents
Nonmagnetic corrosion-resistant drill string members Download PDFInfo
- Publication number
- US3659882A US3659882A US881154A US3659882DA US3659882A US 3659882 A US3659882 A US 3659882A US 881154 A US881154 A US 881154A US 3659882D A US3659882D A US 3659882DA US 3659882 A US3659882 A US 3659882A
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- chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/16—Drill collars
Definitions
- Hot/cold working to control 2l 20 zone yield p int -7'0lt1 II
- Nonmoqnetic stress-corroslon-reslstunt (02% alonqatron) drill-string length NONMAGNETIC CORROSION-RESISTANT DRILL STRING MEMBERS FIELD OF THE INVENTION and better nonmagnetic character than has been obtainable heretofore.
- the stringent requirements of deep drilling i.e., drilling for subsurface deposits of gas and petroleum, deep-well drilling for mineral and water recovery, coring for subsurface and strata analysis and the like
- a drill string consisting of interconnected lengths or members, the ends of which are threaded for engagement with the complementary ends of the adjoining lengths.
- drill strings from conventional l8/8 chromium-nickel stainless steel having an austenitic crystallographic, microcrystalline, grain or lattice structure.
- drill strings composed of such alloys have generally been unsatisfactory both with respect to the requirement that the drill string be nonmagnetic and with respect to the insufficient strength of the steel which has a yield point well below the minimum permissable for use in deep-drilling systems.
- the central zone of the drill-string length (between the coupling ends), be subjected to so-called hot/cold working at a temperature of 500 to 800 C. to a yield point up to 70 kp/mm (kiloponds per millimeter square) at 0.2 percent elongation, while the ends or threaded portions of the drill string member are hot/cold worked at this temperature to a minimum yield point (0.2 percent elongation) of 70 kp/mm'-
- the resulting body has a surprising resistance to stress-corrosion cracking and is capable of withstanding the mechanical rigors of deep drilling while being as nonmagnetizable as the best nonmagnetic materials heretofore used in drill strings.
- FIGURE of the drawing represents an elevational view of a drill string, partly broken away.
- each length is provided with a threaded end portion 11 with a female thread 13 adapted to receive the male thread 14 at the other threaded end 12 of an adjoining drill-string length.
- the female threaded end 21 is shown to receive the male threaded end 14 at the coupling of the members l0 and 20.
- Test 1 Test ll Yield Point (0.2% Elongation) 87.7 lip/mm 84.0 kp/mm' Tensile Strength 95.2 lip/mm 92.4 kp/mm' Elongation l- M) 28.0% 27.0% Reduction in Area (Contraction) 64.0% 65.0% Notched-bar lmpact-strength 15.0 mkp/cm 15.6 mkp/cm (Chal'PY The permeability of the drill-string member had a value less than 1.005 Gauss/Oersted with a field intensity of l00/Oersted.
- a drill-string length having a central body portion and a pair of complementarily threaded end portions, said portions being formed in one piece from a nonmagnetizable austenitic nickel-chromium steel alloy resistant to stress-corrosion cracking and consisting essentially of trace amounts to 0.07 percent by weight carbon, trace amounts to 1.00 percent by wci t silicon 0.50 to 2.00 rcent b wei t man ese 20. 0 to 25.00 percent by weight chrori tium, l 0.00 to 1 5.
Abstract
A drill string for deep-well drilling, coring and the like is composed of lengths unitarily formed of a nonmagnetic, highnitrogen, chromium-nickel austenitic alloy steel and has a pair of threaded ends matingly engageable with the complementary ends of adjoining lengths and an intermediate or central portion between these ends. The drill-string members are composed of alloy steel containing from trace amounts to 0.07 per cent by weight carbon, trace amounts to 1.00 per cent by weight silicon, 0.50 to 2.00 per cent by weight manganese, 20.0 to 25.0 per cent by weight chromium, 10.0 to 15.0 per cent by weight nickel, 0.05 to 0.50 per cent by weight nitrogen and the balance iron and the usual impurities present in chromium-nickel alloy steels. The drill-string members are resistant to stress corrosion cracking and have their central zones worked (hot/cold working) to a yield point up to 70 kp/mm2 (0.2 percent elongation) while the threaded end portions are hot/cold worked to a yield point above the minimum of (0.2 percent elongation) 70 kp/mm2.
Description
United States Patent 1151 3,659,882 Souresny [4 1 I May 2, 1972 s41 NONMAGNETIC CORROSION- 3,112,195 11/1963 Souresny ..75/l26R RESISTANT DRILL STRING MEMBERS Primary ExaminerDave W. Arola [72] Inventor: Herbert Souresny, Ternitz, Austria Anomey Kafl E Ross 73 Assi nee: Schoeller-Bleckman Stahlwerke Aktlen- 1 g gesellschaft, Vienna, Austria ABSTRACT [22] Filed, 1, 1969 A drill string for deep-well drilling, coring and the like is composed of lengths unitarily formed of a nonmagnetic, high- [21] Appl. No.: 881,154 nitrogen, chromium-nickel austenitic alloy steel and has a pair of threaded ends matingly engageable with the complementar ends of ad'oinin len ths and an intermediate or central [30] Forelgn Appucauon Priority Data pzmion betwe en th ese finds. The drill-string members are Dec. 2, 1968 Austria ..A1 1685/68 Composed of alloy Steel containing from trace amounts to per cent by weight carbon, trace amounts to 1.00 per cent by 52 U.S. c1 ..285/333,75/128,148/37, weight silicon, 050 w P cent y weight manganese, 22 20.0 to 25.0 per cent by weight chromium, 10.0 to 15.0 per 51 Int. Cl ..F16l 25 00 cent by Weight nickel, to P cent by weight nitrogen [58] Field of Search ..75/l26 R, 128 R, 128 A, 128 N; and the balame iron and the usual impurities Present in 148/4 37; 285/333 334 422; 287/125 chromium-nickel alloy steels. The drill-string members are re sistant to stress corrosion cracking and have their central zones worked (hot/cold working) to a yield point up to 70 [56] Relerences Cited kp/mm' (0.2 percent elongation) while the threaded end por- UNITED STATES PATENTS tions are hot/cold worked to a yield point above the minimum of (0.2 percent elongation) 70 kp/mm. 2,121,391 6/1938 Amess ..75/128 N 2,676,820 4/1954 Boice ..285/333 X 2 Claims, 1 Drawing Figure Up to 0.07% 0 Up to 1.00% Si 0.50 to 2.00% Mn 20.0 to 25.00% Cr no '0 '50 Ni Threaded and yield point '3 H '6 l5 05 to 5% N TOkp/rnm (0.2% elongation Bol. Fm! imp.
hot/cold workin Hot/cold working to control 2l 20 zone yield p int -7'0lt1 II Nonmoqnetic stress-corroslon-reslstunt (02% alonqatron) drill-string length NONMAGNETIC CORROSION-RESISTANT DRILL STRING MEMBERS FIELD OF THE INVENTION and better nonmagnetic character than has been obtainable heretofore.
BACKGROUND OF THE INVENTION The stringent requirements of deep drilling (i.e., drilling for subsurface deposits of gas and petroleum, deep-well drilling for mineral and water recovery, coring for subsurface and strata analysis and the like) generally makes use of a drill string consisting of interconnected lengths or members, the ends of which are threaded for engagement with the complementary ends of the adjoining lengths.
Frequently the string must be used to guide a magnetometer or other magnetically responsive instrument to subsurface levels for geological exploration, investigation of the geological formations, analysis of the progress of drilling or the like. To this end it is important that the drill string be more or less nonmagnetic or nonmagnetizable and it has of course been proposed heretofore to provide nonmagnetic or nonmagnetizable drill strings whose central bore could accommodate a measuring instrument of this nature without adversely affecting the readings thereof.
In one prior-art system, the drill string is composed of a metal alloy predominantly consisting of nickel, especially an alloy of 65 percent by weight nickel, 25 percent by weight copper and a maximum of 5 percent by weight aluminum. Drill-string lengths or parts composed of this alloy were nonmagnetic and possessed, for the most part, mechanical strength properties recognized as desirable in drill-string members. A disadvantage of such a system is the high cost of the alloy and the drill string and thus it has long been desired to provide less expensive and still further improved alloys for use in drill strings, and to provide drill strings of improved properties.
It has, for example, been proposed to provide drill strings from conventional l8/8 chromium-nickel stainless steel having an austenitic crystallographic, microcrystalline, grain or lattice structure. In practice, however, drill strings composed of such alloys have generally been unsatisfactory both with respect to the requirement that the drill string be nonmagnetic and with respect to the insufficient strength of the steel which has a yield point well below the minimum permissable for use in deep-drilling systems.
Moreover, the drill-string members of this composition fail to withstand the corrosive action within the bore and create difficulties in this regard as well. To avoid these disadvantages, it has been suggested to substitute magnetic or magnetizable portions or collars of higher quality steel, less susceptible to corrosion, at the threaded ends of the drill-string length. These end portions are welded to the central or body portion which is composed of the nonmagnetic or nonmagnetizable alloy. While corrosion affects such composite drill-string members to a lesser extent, a further disadvantage is created because the magnetic portions of the member impede or disrupt operation of the measuring device.
OBJECTS OF THE INVENTION It is, therefore, the principal object of the present invention to provide an improved drill string or drill-string member which will obviate the above-mentioned disadvantages and constitute a significant advance over earlier drill strings.
SUMMARY OF THE INVENTION This object and others which will become apparent hereinafter is attained with a drill-string member having a pair of threaded end portions unitarily and monolithically integral with a central zone or body and composed of one piece; the member is fonned of a steel alloy with an austenitic and nonmagnetic character and which nevertheless is stress-corrosioncracking resistant.
The composition or alloy, according to this invention, consists of up to (from trace amounts) 0.07 percent by weight carbon, up to (from trace amounts) 1.00 percent by weight silicon, 050 to 2.00 percent by weight manganese, 20.00 to 25.00 per cent by weight chromium, 10.00 to 15.00 per cent by weight nickel and 0.05 to 0.50 per cent by weight nitrogen, the balance iron and the usual impurities associated with chromium-nickel steel alloys and which do not affect the properties thereof.
It is essential for the purposes of the present invention that the central zone of the drill-string length (between the coupling ends), be subjected to so-called hot/cold working at a temperature of 500 to 800 C. to a yield point up to 70 kp/mm (kiloponds per millimeter square) at 0.2 percent elongation, while the ends or threaded portions of the drill string member are hot/cold worked at this temperature to a minimum yield point (0.2 percent elongation) of 70 kp/mm'- The resulting body has a surprising resistance to stress-corrosion cracking and is capable of withstanding the mechanical rigors of deep drilling while being as nonmagnetizable as the best nonmagnetic materials heretofore used in drill strings. I am aware that it has been proposed heretofore to make use of manganese austenite to overcome some of the disadvantages of earlier compositions and even to add chromium to form manganese chromium alloys for drill strings. Hot/cold forming and working has been proposed in conjunction with these latter compositions which, however, are susceptible to severe attack by the corrosive chloride solutions frequently encountered in drilling.
Stresscorrosion cracking is particularly severe on compositions of the latter type so that it is altogether surprising that chromium-nickel austenitic steels of the invention with the relatively high manganese content of 0.5 to 2.00 per cent by weight has a significant resistance to stress-corrosion cracking. In fact, tests of drill-string members, in accordance with the present invention, show that even with strong deformation under stresses of the order of the yield point and in the presence of boiling synthetic sea water as a corrosive enveronment, the members resist stress-corrosion cracking for periods of 5,000 hours or more.
DESCRIPTION OF THE. DRAWING The above and other objects, features and advantages of this invention will become more readily apparent from the following description, reference being made to the accompanying drawing and the following specific example. The sole FIGURE of the drawing represents an elevational view of a drill string, partly broken away.
SPECIFIC DESCRIPTION In the drawing I show a drill string constituted of a plurality of axially interconnected drill- string lengths 10 and 20 each of which has a central portion or zone 15 of generally cylindrical configuration and provided with a central bore 16 through which a magnetically responsive measuring device may be passed.
At one end, each length is provided with a threaded end portion 11 with a female thread 13 adapted to receive the male thread 14 at the other threaded end 12 of an adjoining drill-string length. The female threaded end 21 is shown to receive the male threaded end 14 at the coupling of the members l0 and 20.
As noted in the drawing, the drill- string members 10 and 20 are composed of nonmagnetic stress-corrosion cracking highresistant austenitic steel consisting up to 0.07 percent of carbon, up to 1.00 percent of silicon, 0.5 to 2.00 percent of manganese, 20 to 25 percent of chromium, l0 to 15 percent of Balance lron and trace impurities which do not affect the properties of the alloy.
The tests detailed below were found to yield similar results, within the range of experimental error, when the silicon content was varied between 1.00 and 1.10 percent by weight, the chromium content was varied between 21.50 and 23.00 percent by weight, the nickel content was varied between 12.00 and 13.0 percent by weight and the nitrogen content was varied between 0.27 and 0.32 percent by weight.
The aforementioned composition was machined to produce drill-string lengths of the type described in my prior U.S. Pat. No. 3,112,195 issued Nov. 26 1963.
For the central portion of the members, the following physical properties were found (after hot/cold working at a temperature of about 750 C.
Yield Point (0.2% Elongation) 58.6 kp/mnt square centimeter) In two tests the threaded ends were found to have the following characteristics:
Test 1 Test ll Yield Point (0.2% Elongation) 87.7 lip/mm 84.0 kp/mm' Tensile Strength 95.2 lip/mm 92.4 kp/mm' Elongation l- M) 28.0% 27.0% Reduction in Area (Contraction) 64.0% 65.0% Notched-bar lmpact-strength 15.0 mkp/cm 15.6 mkp/cm (Chal'PY The permeability of the drill-string member had a value less than 1.005 Gauss/Oersted with a field intensity of l00/Oersted. Tests in boiling synthetic sea water, after stressing the member substantially to the value of its yield point at the central and end zones, shows no stress-corrosion cracking after 5,000 hours. The drill-string members can be made to a length of 10 meters without difiiculty and are highly effective in chloride environments and in deep-well drilling in general.
What is claimed is:
1. A drill-string length having a central body portion and a pair of complementarily threaded end portions, said portions being formed in one piece from a nonmagnetizable austenitic nickel-chromium steel alloy resistant to stress-corrosion cracking and consisting essentially of trace amounts to 0.07 percent by weight carbon, trace amounts to 1.00 percent by wci t silicon 0.50 to 2.00 rcent b wei t man ese 20. 0 to 25.00 percent by weight chrori tium, l 0.00 to 1 5.
percent by weight nickel, and 0.05 to 0.50 percent by weight nitrogen, the balance being iron and the usual impurities, said central portion being hot/cold worked to a yield point up to 70 ltp/mm (0.2 percent elongation) and said end portions being hot/cold worked to a yield point of at least 70 lip/mm (0.2 percent elongation).
2. The drill-string length defined in claim 1 wherein said alloy has the following composition:
Up to 0.05% Carbon 0.35 to 0.60% Silicon 1.00 to 1.10% Manganese 2 L50 to 23.00% Chromium 12.00 to 13.00% Nickel 0.27 to 0.32% Nitrogen Balance lron and Impurities
Claims (2)
1. A drill-string length having a central body portion and a pair of complementarily threaded end portions, said portions being formed in one piece from a nonmagnetizable austenitic nickel-chromium steel alloy resistant to stress-corrosion cracking and consisting essentially of trace amounts to 0.07 percent by weight carbon, trace amounts to 1.00 percent by weight silicon, 0.50 to 2.00 percent by weight manganese, 20.00 to 25.00 percent by weight chromium, 10.00 to 15.00 percent by weight nickel, and 0.05 to 0.50 percent by weight nitrogen, the balance being iron and the usual impurities, said central portion being hot/cold worked to a yield point up to 70 kp/mm2 (0.2 percent elongation) and said end portions being hot/cold worked to a yield point of at least 70 kp/mm2 (0.2 percent elongation).
2. The drill-string length defined in claim 1 wherein said alloy has the following composition: Up to 0.05% Carbon 0.35 to 0.60% Silicon 1.00 to 1.10% Manganese 21.50 to 23.00% Chromium 12.00 to 13.00% Nickel 0.27 to 0.32% Nitrogen Balance Iron and Impurities
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1168568A AT308793B (en) | 1968-12-02 | 1968-12-02 | Austenitic chrome-nickel-nitrogen-steel alloy for non-magnetizable drill collar and rod parts |
Publications (1)
Publication Number | Publication Date |
---|---|
US3659882A true US3659882A (en) | 1972-05-02 |
Family
ID=3630125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US881154A Expired - Lifetime US3659882A (en) | 1968-12-02 | 1969-12-01 | Nonmagnetic corrosion-resistant drill string members |
Country Status (6)
Country | Link |
---|---|
US (1) | US3659882A (en) |
AT (1) | AT308793B (en) |
DE (1) | DE1957375C3 (en) |
FR (1) | FR2024996A1 (en) |
GB (1) | GB1247567A (en) |
NL (1) | NL6917627A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3854937A (en) * | 1970-12-14 | 1974-12-17 | Nippon Steel Corp | Pitting corrosion resistant austenite stainless steel |
USRE29313E (en) * | 1970-12-14 | 1977-07-19 | Nippon Steel Corporation | Pitting corrosion resistant austenite stainless steel |
US4105562A (en) * | 1976-05-06 | 1978-08-08 | Textron Inc. | Filtering apparatus with modular filter elements |
US4217966A (en) * | 1978-01-26 | 1980-08-19 | Smith International, Inc. | Junk basket, bit and reamer stabilizer |
US4386458A (en) * | 1981-03-31 | 1983-06-07 | Evans Robert F | Fatigue resistance for coupling and connection joint mechanisms |
US4506432A (en) * | 1983-10-03 | 1985-03-26 | Hughes Tool Company | Method of connecting joints of drill pipe |
EP0183536A2 (en) * | 1984-11-30 | 1986-06-04 | Nippon Steel Corporation | Non-magnetic steel having high corrosion resistance and high strength for use as material of drill collar, and drill collar made of the steel |
US4758025A (en) * | 1985-06-18 | 1988-07-19 | Mobil Oil Corporation | Use of electroless metal coating to prevent galling of threaded tubular joints |
EP1078190A1 (en) * | 1998-05-01 | 2001-02-28 | Grant Prideco, Inc | Heavy weight drill pipe |
US20040083835A1 (en) * | 2002-10-31 | 2004-05-06 | Casper William L. | Insertion tube methods and apparatus |
US20050120813A1 (en) * | 2002-10-31 | 2005-06-09 | Clark Don T. | Apparatuses for interaction with a subterranean formation, and methods of use thereof |
US20060032629A1 (en) * | 2002-10-31 | 2006-02-16 | Casper William L | Insertion tube methods and apparatus |
US9347121B2 (en) | 2011-12-20 | 2016-05-24 | Ati Properties, Inc. | High strength, corrosion resistant austenitic alloys |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT364592B (en) * | 1980-01-25 | 1981-10-27 | Ver Edelstahlwerke Ag | METHOD FOR PRODUCING TENSION RACK CORROSION-RESISTANT, NON-MAGNETIZABLE HEAVY RODS FROM AUSTENITIC STEELS AND DEVICE FOR IMPLEMENTING THE METHOD |
JPS58167724A (en) * | 1982-03-26 | 1983-10-04 | Kobe Steel Ltd | Method of preparing blank useful as stabilizer for drilling oil well |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2121391A (en) * | 1933-11-30 | 1938-06-21 | Rustless Iron & Steel Corp | Noncorrodible alloy articles and method of making same |
US2676820A (en) * | 1951-09-24 | 1954-04-27 | Reed Roller Bit Co | Drill collar |
US3112195A (en) * | 1959-06-04 | 1963-11-26 | Schoeller Bleckmann Stahlwerke | Drill stems for deep-well drill rods from non-magnetizable austenitic manganese-chromium alloy steels |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1205285B (en) * | 1962-12-28 | 1965-11-18 | Ver Deutsche Metallwerke Ag | Use of manganese and silicon-containing copper alloys for items subject to wear and tear |
DE1194587B (en) * | 1963-06-06 | 1965-06-10 | Phoenix Rheinrohr Ag | Use of austenitic steel alloys as a material for welded components that are exposed to attack by seawater and / or marine atmosphere |
-
1968
- 1968-12-02 AT AT1168568A patent/AT308793B/en not_active IP Right Cessation
-
1969
- 1969-11-14 DE DE1957375A patent/DE1957375C3/en not_active Expired
- 1969-11-21 NL NL6917627A patent/NL6917627A/xx unknown
- 1969-11-28 FR FR6941046A patent/FR2024996A1/fr not_active Withdrawn
- 1969-12-01 US US881154A patent/US3659882A/en not_active Expired - Lifetime
- 1969-12-02 GB GB58910/69A patent/GB1247567A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2121391A (en) * | 1933-11-30 | 1938-06-21 | Rustless Iron & Steel Corp | Noncorrodible alloy articles and method of making same |
US2676820A (en) * | 1951-09-24 | 1954-04-27 | Reed Roller Bit Co | Drill collar |
US3112195A (en) * | 1959-06-04 | 1963-11-26 | Schoeller Bleckmann Stahlwerke | Drill stems for deep-well drill rods from non-magnetizable austenitic manganese-chromium alloy steels |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3854937A (en) * | 1970-12-14 | 1974-12-17 | Nippon Steel Corp | Pitting corrosion resistant austenite stainless steel |
USRE29313E (en) * | 1970-12-14 | 1977-07-19 | Nippon Steel Corporation | Pitting corrosion resistant austenite stainless steel |
US4105562A (en) * | 1976-05-06 | 1978-08-08 | Textron Inc. | Filtering apparatus with modular filter elements |
US4217966A (en) * | 1978-01-26 | 1980-08-19 | Smith International, Inc. | Junk basket, bit and reamer stabilizer |
US4386458A (en) * | 1981-03-31 | 1983-06-07 | Evans Robert F | Fatigue resistance for coupling and connection joint mechanisms |
US4506432A (en) * | 1983-10-03 | 1985-03-26 | Hughes Tool Company | Method of connecting joints of drill pipe |
EP0183536A2 (en) * | 1984-11-30 | 1986-06-04 | Nippon Steel Corporation | Non-magnetic steel having high corrosion resistance and high strength for use as material of drill collar, and drill collar made of the steel |
EP0183536A3 (en) * | 1984-11-30 | 1987-05-13 | Nippon Steel Corporation | Non-magnetic steel having high corrosion resistance and high strength for use as material of drill collar, and drill collar made of the steel |
US4758025A (en) * | 1985-06-18 | 1988-07-19 | Mobil Oil Corporation | Use of electroless metal coating to prevent galling of threaded tubular joints |
EP1078190A1 (en) * | 1998-05-01 | 2001-02-28 | Grant Prideco, Inc | Heavy weight drill pipe |
EP1078190A4 (en) * | 1998-05-01 | 2003-04-09 | Grant Prideco Inc | Heavy weight drill pipe |
US20040083835A1 (en) * | 2002-10-31 | 2004-05-06 | Casper William L. | Insertion tube methods and apparatus |
US20050011290A1 (en) * | 2002-10-31 | 2005-01-20 | Casper William L. | Insertion tube methods and apparatus |
US20050120813A1 (en) * | 2002-10-31 | 2005-06-09 | Clark Don T. | Apparatuses for interaction with a subterranean formation, and methods of use thereof |
US20060032629A1 (en) * | 2002-10-31 | 2006-02-16 | Casper William L | Insertion tube methods and apparatus |
US7178391B2 (en) | 2002-10-31 | 2007-02-20 | Battelle Energy Alliance, Llc | Insertion tube methods and apparatus |
US7311011B2 (en) | 2002-10-31 | 2007-12-25 | Battelle Energy Alliance, Llc | Apparatuses for interaction with a subterranean formation, and methods of use thereof |
US9347121B2 (en) | 2011-12-20 | 2016-05-24 | Ati Properties, Inc. | High strength, corrosion resistant austenitic alloys |
Also Published As
Publication number | Publication date |
---|---|
GB1247567A (en) | 1971-09-22 |
NL6917627A (en) | 1970-06-04 |
FR2024996A1 (en) | 1970-09-04 |
AT308793B (en) | 1973-07-25 |
DE1957375B2 (en) | 1977-01-13 |
DE1957375A1 (en) | 1970-06-18 |
DE1957375C3 (en) | 1982-04-29 |
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