US20010026069A1 - Corrosion-resistant thread joint for percussion drill element and method of achieving such resistance - Google Patents
Corrosion-resistant thread joint for percussion drill element and method of achieving such resistance Download PDFInfo
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- US20010026069A1 US20010026069A1 US09/796,364 US79636401A US2001026069A1 US 20010026069 A1 US20010026069 A1 US 20010026069A1 US 79636401 A US79636401 A US 79636401A US 2001026069 A1 US2001026069 A1 US 2001026069A1
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- Prior art keywords
- coating
- thread
- percussive drilling
- steel material
- combination according
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Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 24
- 230000007797 corrosion Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 5
- 238000009527 percussion Methods 0.000 title 1
- 238000000576 coating method Methods 0.000 claims abstract description 65
- 239000011248 coating agent Substances 0.000 claims abstract description 64
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 239000011135 tin Substances 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims 2
- 239000011435 rock Substances 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
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Images
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/57—Distinct end coupler
- Y10T403/5746—Continuous thread
Definitions
- the present invention relates to a drill element for rock drilling, and to a thread joint for interconnecting the drill element to other drill elements, wherein the thread joint is protected against corrosion.
- the invention also pertains to a method of protecting a threaded end of a drill element from corrosion.
- the drill elements i.e. bits, rods, tubes, sleeves and shanks adapters
- corrosive attacks This applies in particular to underground drilling where water is used as a flushing medium and where the environment is humid.
- the corrosive attacks are particularly serious in the most stressed parts, i.e., thread bottoms and thread clearances.
- corrosion fatigue arises. This is a common cause for failure of the drill element.
- One object of the present invention is to substantially improve the resistance against corrosion fatigue of a drill element for percussive rock drilling.
- Another object of the present invention is to substantially improve the resistance against corrosion fatigue in sections of reduced cross-sections in a drill element for percussive rock drilling.
- Still another object of the present invention is to substantially improve the resistance against corrosion fatigue in the roots of the thread in a threaded portion in a drill element for percussive rock drilling.
- the present invention relates to a percussive drilling component which has a male screw thread, as well as to the combination of that drilling component attached to another drilling component which has a female screw thread.
- the percussive drilling component is formed of a steel material and includes an integral substantially cylindrical male screw thread.
- the thread comprises thread crests and thread roots interconnected by thread flanks.
- the thread is coated with a material having a higher electrode potential than the steel material.
- the coating on the thread is situated at least in regions located radially inwardly of the thread flanks.
- the female screw thread could also be coated with the high potential material, with the coating situated in regions located radially outwardly of the female thread flanks.
- the invention also pertains to a method of protecting a threaded end of a steel percussive drilling component against corrosion, by coating the entire threaded end with a coating material having a higher electrode potential than the steel material, wherein the coating will be disposed on impact regions of the thread where the coating will be worn off during percussive drilling.
- FIG. 1 shows a drill element according to the present invention in a side view, partly in cross-section
- FIG. 2 shows one end of the drill element of FIG. 1 in a side view
- FIG. 3 shows an axial cross-section of a fragment of the end shown in FIG. 2;
- FIG. 4 shows an axial cross-section of a first embodiment of a thread joint according to the present invention
- FIG. 5 shows an axial cross-section of a second embodiment of a thread joint according to the present invention.
- FIG. 6 shows an axial cross-section of an alternative embodiment of a drill element according to the present invention.
- a drill element or first drill string component 10 for percussive drilling shown in FIGS. 1 to 4 is in the form of a drill tube provided at one end with a sleeve or female portion 11 having a cylindrical female (internal) screw thread 12 .
- the female portion 11 constitutes an integral part of the drill tube 10 .
- the drill tube 10 is formed with a spigot or male portion 13 provided with a cylindrical male screw thread or cylindrical external screw thread 14 .
- the shown thread is a so-called trapezoid thread but other thread shapes can be used, for example a rope thread.
- the drill element has a through-going central flush channel 15 , through which a flush medium, usually air or water, is transferred.
- a plurality of the components 10 are screwed together, i.e., the male portion 13 of one component 10 is screwed into the female portion 11 of another, identical component 10 , as depicted in FIG. 4.
- the male thread 14 comprises thread flanks 16 , 17 and thread roots 20 arranged between the flanks.
- the female thread 12 comprises the thread flanks 18 , 19 and thread roots 21 arranged between flanks.
- the thread roots 20 of the male thread 14 are provided substantially distant from the associated crests 22 of the female thread.
- regions of reduced cross-section of the male portion e.g., the thread roots 20 , restrictions 24 , and clearances
- a coating formed of at least one surface-modifying, corrosion-resistant layer L is provided with a coating formed of at least one surface-modifying, corrosion-resistant layer L.
- the greatest layer thickness is 0.002-5 mm, preferably 0.02-2 mm.
- the thread root has a first width, W 1 (measured in a direction parallel to the axis of the component 10 ).
- the thread that is the thread crest 23 and the uncoated part of the thread flanks 16 , 17 have a second width, W 2 (FIG. 3), wherein the ratio W 1 /W 2 is 0.02-1.2, preferably 0.3-0.8.
- a rope thread (of designation R 35 ) was covered by a 5 mm thick coating (W 1 ).
- Said corrosion-resistant layer L in the coating of the drill element according to the invention is more electro-positive than the carrying or underlying steel of the component 10 . That is, the layer has a more positive electrode potential by at least 50 mV, preferably by at least 100 mV and most preferably by at least 250 mV, in the actual environment, and thus has more resistance to corrosive attack, i.e., galvanic corrosion.
- protective material are nickel, chromium, copper, tin, cobalt and titanium as well as alloys of these, preferably corrosion resistant steels or Co— or Ni—base alloys.
- the remaining layers can comprise binder layers in order to increase the bond between the coating and the steel.
- a number of different coating methods can be used to apply the layer L, for example hot dipping, chemical or electrolytic plating, thermal spraying and welding, preferably welding by means of laser. If the threaded end of the tube 10 were dipped into a bath of the coating substance, the entire male thread would become coated. After the tube 10 has been screwed together with the female thread of another tube during the formation of a string, parts of the two threads will be in contact with one another. During a percussive drilling operation, the coating at those contact or impact regions, which is not needed, will be quickly worn off, leaving the coating intact at the regions where corrosion protection is especially needed, i.e., at the regions of reduced cross section that are exposed to corrosive attacks.
- FIG. 1 During so-called production drilling of long holes a drill tube 10 of about 2 m long is used, FIG. 1, which is combined with others to form a long string, i.e., six tubes of low-alloy steel were employed in the string.
- the critical parts of the tubes from a corrosion standpoint are the bottoms (roots) 20 of the external threads 14 (FIG. 2). Flushing water and pulsating tensile stresses lead to corrosion fatigue (galvanic corrosion) that frequently results in fracture.
- the thread roots 20 of the external threads were covered by a layer of maximum thickness of 0.6-0.9 mm by laser welding.
- Two different alloys with electrode potentials and compositions according to the table shown below were used for creating the layer, each alloy having a higher electrode potential than the low-alloy steel material of the tube.
- the six tubes 10 were used together with 14 conventional tubes in the same drill string in a rig for production drilling underground and were drilled until fracture, or until the tubes were worn-out.
- the following life spans, measured in drilled meters, were obtained for the individual tubes 10 according to the present invention: Test 1 751 m, Test 2 881 m Test 3 >1003 m Test 4 >1003 m Test 5 892 m Test 6 1193 m
- the thread 12 ′ of the female portion 11 ′ would be coated with a layer of a material of higher electrode potential than the low-alloy steel, FIG. 5.
- sections of the female portion 11 ′ of reduced cross-section would be provided with a coating of at least one surface-modifying, corrosion-resistant layer L. Only the most exposed portions, that is, sections of reduced cross-section such as thread roots 21 ′, restrictions and clearances would preferably be coated.
- Everything stated above about the coating L, including all of the thickness and width characteristics applies also to the case where the coating is applied to the female portion 11 ′.
- the entire female thread could be dipped in a bath of coating material, whereupon the coating at the impact regions would wear away during drilling.
- a drill element according to the present invention only the most stressed parts of the thread root would be coated.
- only one of the two transitions 30 , 32 between the thread root 20 and the flank of a trapezoidal thread would be provided with a layer L.
- both of the transitions 30 , 32 could be provided with layers L.
- the invention consequently relates to a thread joint and a drill element for percussive drilling with a restricted portion which is coated by a corrosion-resistant layer in order to substantially improve the resistance to corrosion fatigue.
- the layer is preferably discontinuous in the axial direction of the tube to avoid deposition on and softening of the thread flanks.
Abstract
Description
- This application claims priority under 35 U.S.C. §§ 119 and/or 356 to Patent Application Ser. No. 0000701-3 filed in Sweden on Mar. 2, 2000.
- The present invention relates to a drill element for rock drilling, and to a thread joint for interconnecting the drill element to other drill elements, wherein the thread joint is protected against corrosion. The invention also pertains to a method of protecting a threaded end of a drill element from corrosion.
- During percussive rock drilling, the drill elements, i.e. bits, rods, tubes, sleeves and shanks adapters, are subjected to corrosive attacks. This applies in particular to underground drilling where water is used as a flushing medium and where the environment is humid. The corrosive attacks are particularly serious in the most stressed parts, i.e., thread bottoms and thread clearances. In combination with pulsating stress, caused by shock waves and bending loads, so-called corrosion fatigue arises. This is a common cause for failure of the drill element.
- Today low-alloyed, case hardened steels are normally used in the drill element. The reason for this is that abrasion and wear of the thread parts have generally limited the life of the drill element. As the drill machines and the drill elements have become more efficient, problems due to abrasion and wear have diminished, and corrosion fatigue has become a major factor in limiting the life of the drill element.
- The case hardening produces compressive stresses in the surface, which gives certain beneficial effects against the mechanical part of the fatigue. The resistance to corrosion in a low-alloyed steel is however poor and for that reason corrosion fatigue still happens easily.
- In U.S. Pat. Nos. 4,872,515 or 5,064,004 a drill element is shown wherein a threaded portion is covered with a metallic material, which is softer than the steel of the drill element. Thus, it is intended to solve the problem of pitting in the threads by covering at least the parts of the thread of the drill element that cooperate with other parts of the threaded connection.
- One object of the present invention is to substantially improve the resistance against corrosion fatigue of a drill element for percussive rock drilling.
- Another object of the present invention is to substantially improve the resistance against corrosion fatigue in sections of reduced cross-sections in a drill element for percussive rock drilling.
- Still another object of the present invention is to substantially improve the resistance against corrosion fatigue in the roots of the thread in a threaded portion in a drill element for percussive rock drilling.
- The present invention relates to a percussive drilling component which has a male screw thread, as well as to the combination of that drilling component attached to another drilling component which has a female screw thread.
- The percussive drilling component is formed of a steel material and includes an integral substantially cylindrical male screw thread. The thread comprises thread crests and thread roots interconnected by thread flanks. The thread is coated with a material having a higher electrode potential than the steel material. The coating on the thread is situated at least in regions located radially inwardly of the thread flanks.
- In the case of the combination wherein the above-described drilling component is attached to another drilling component having a female screw thread, the female screw thread could also be coated with the high potential material, with the coating situated in regions located radially outwardly of the female thread flanks.
- The invention also pertains to a method of protecting a threaded end of a steel percussive drilling component against corrosion, by coating the entire threaded end with a coating material having a higher electrode potential than the steel material, wherein the coating will be disposed on impact regions of the thread where the coating will be worn off during percussive drilling.
- The objects and advantages of the invention will become apparent from the following detailed description of preferred embodiments thereof in connection with the accompanying drawings, in which like numerals designate like elements, and in which:
- FIG. 1 shows a drill element according to the present invention in a side view, partly in cross-section;
- FIG. 2 shows one end of the drill element of FIG. 1 in a side view;
- FIG. 3 shows an axial cross-section of a fragment of the end shown in FIG. 2;
- FIG. 4 shows an axial cross-section of a first embodiment of a thread joint according to the present invention;
- FIG. 5 shows an axial cross-section of a second embodiment of a thread joint according to the present invention; and
- FIG. 6 shows an axial cross-section of an alternative embodiment of a drill element according to the present invention.
- A drill element or first
drill string component 10 for percussive drilling shown in FIGS. 1 to 4 is in the form of a drill tube provided at one end with a sleeve orfemale portion 11 having a cylindrical female (internal)screw thread 12. Thefemale portion 11 constitutes an integral part of thedrill tube 10. At its other end thedrill tube 10 is formed with a spigot ormale portion 13 provided with a cylindrical male screw thread or cylindricalexternal screw thread 14. The shown thread is a so-called trapezoid thread but other thread shapes can be used, for example a rope thread. Furthermore, the drill element has a through-going central flush channel 15, through which a flush medium, usually air or water, is transferred. - In use, a plurality of the
components 10 are screwed together, i.e., themale portion 13 of onecomponent 10 is screwed into thefemale portion 11 of another,identical component 10, as depicted in FIG. 4. - The
male thread 14 comprisesthread flanks thread roots 20 arranged between the flanks. Thefemale thread 12 comprises thethread flanks thread roots 21 arranged between flanks. In a tightened joint shown in FIG. 4 thethread roots 20 of themale thread 14 are provided substantially distant from the associatedcrests 22 of the female thread. - According to the present invention, regions of reduced cross-section of the male portion, e.g., the
thread roots 20,restrictions 24, and clearances, are provided with a coating formed of at least one surface-modifying, corrosion-resistant layer L. The greatest layer thickness is 0.002-5 mm, preferably 0.02-2 mm. The thread root has a first width, W1 (measured in a direction parallel to the axis of the component 10). The thread, that is thethread crest 23 and the uncoated part of thethread flanks - Said corrosion-resistant layer L in the coating of the drill element according to the invention is more electro-positive than the carrying or underlying steel of the
component 10. That is, the layer has a more positive electrode potential by at least 50 mV, preferably by at least 100 mV and most preferably by at least 250 mV, in the actual environment, and thus has more resistance to corrosive attack, i.e., galvanic corrosion. Examples of such protective material are nickel, chromium, copper, tin, cobalt and titanium as well as alloys of these, preferably corrosion resistant steels or Co— or Ni—base alloys. The remaining layers can comprise binder layers in order to increase the bond between the coating and the steel. - A number of different coating methods can be used to apply the layer L, for example hot dipping, chemical or electrolytic plating, thermal spraying and welding, preferably welding by means of laser. If the threaded end of the
tube 10 were dipped into a bath of the coating substance, the entire male thread would become coated. After thetube 10 has been screwed together with the female thread of another tube during the formation of a string, parts of the two threads will be in contact with one another. During a percussive drilling operation, the coating at those contact or impact regions, which is not needed, will be quickly worn off, leaving the coating intact at the regions where corrosion protection is especially needed, i.e., at the regions of reduced cross section that are exposed to corrosive attacks. - Thus, it is possible within the scope of the invention to coat most or all of the drilling component, whereafter the coating portions disposed at regions where the drilling component contacts an adjacent drilling component will wear away quickly.
- During so-called production drilling of long holes a
drill tube 10 of about 2 m long is used, FIG. 1, which is combined with others to form a long string, i.e., six tubes of low-alloy steel were employed in the string. The critical parts of the tubes from a corrosion standpoint are the bottoms (roots) 20 of the external threads 14 (FIG. 2). Flushing water and pulsating tensile stresses lead to corrosion fatigue (galvanic corrosion) that frequently results in fracture. - The
thread roots 20 of the external threads, according to FIGS. 3 and 4, were covered by a layer of maximum thickness of 0.6-0.9 mm by laser welding. Two different alloys with electrode potentials and compositions according to the table shown below were used for creating the layer, each alloy having a higher electrode potential than the low-alloy steel material of the tube.% % % % % % Electrode C Cr Ni Mo Fe Co potential (mV)* Test 1-4 0.25 27 2.5 6 1 Rest +200 Test 5-6 0.03 21.5 5 2.7 Rest — +100 - *Approximate value in sea-water, 10° C. Corresponding values for the conventional low-alloy steel material of the tube is −500 mV (i.e., negative 500 mV).
- The six
tubes 10 were used together with 14 conventional tubes in the same drill string in a rig for production drilling underground and were drilled until fracture, or until the tubes were worn-out. The following life spans, measured in drilled meters, were obtained for theindividual tubes 10 according to the present invention:Test 1 751 m, Test 2 881 m Test 3 >1003 m Test 4 >1003 m Test 5 892 m Test 6 1193 m - For tests3 and 4 the life span was not reached due to breakage, since the drill string was stuck in the rock before any fracture occurred. The average life span for the above-captioned tests consequently became 954 m. For comparison sake, the normal life span for conventional drill tubes is about 500 m, which means that the coating of the drill element according to the present invention resulted in a striking improvement, i.e., almost a doubling of the life span.
- In an alternative embodiment of a thread joint according to the present invention shown in FIG. 5 also the
thread 12′ of thefemale portion 11′ would be coated with a layer of a material of higher electrode potential than the low-alloy steel, FIG. 5. In other words, sections of thefemale portion 11′ of reduced cross-section would be provided with a coating of at least one surface-modifying, corrosion-resistant layer L. Only the most exposed portions, that is, sections of reduced cross-section such asthread roots 21′, restrictions and clearances would preferably be coated. Everything stated above about the coating L, including all of the thickness and width characteristics, applies also to the case where the coating is applied to thefemale portion 11′. For example, the entire female thread could be dipped in a bath of coating material, whereupon the coating at the impact regions would wear away during drilling. - In another alternative embodiment of a drill element according to the present invention only the most stressed parts of the thread root would be coated. For example, as shown in the right half of FIG. 6, only one of the two
transitions 30, 32 between thethread root 20 and the flank of a trapezoidal thread would be provided with a layer L. Alternatively, as shown in the left half of FIG. 6, both of thetransitions 30, 32 could be provided with layers L. - The invention consequently relates to a thread joint and a drill element for percussive drilling with a restricted portion which is coated by a corrosion-resistant layer in order to substantially improve the resistance to corrosion fatigue. The layer is preferably discontinuous in the axial direction of the tube to avoid deposition on and softening of the thread flanks.
- Although the present invention has been described in connection with preferred embodiments thereof, it will be appreciated by those skilled in the art that additions, deletions, modifications, and substitutions not specifically described may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (34)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0000701A SE515195C2 (en) | 2000-03-02 | 2000-03-02 | Threaded joints and rock drill elements for striking drilling |
SE0000701 | 2000-03-02 | ||
SE0000701-3 | 2000-03-02 |
Publications (2)
Publication Number | Publication Date |
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US20010026069A1 true US20010026069A1 (en) | 2001-10-04 |
US6334493B2 US6334493B2 (en) | 2002-01-01 |
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Application Number | Title | Priority Date | Filing Date |
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US09/796,364 Expired - Fee Related US6334493B2 (en) | 2000-03-02 | 2001-03-02 | Corrosion-resistant thread joint for percussion drill element and method of achieving such resistance |
Country Status (17)
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US (1) | US6334493B2 (en) |
EP (1) | EP1259703B1 (en) |
JP (1) | JP2003525373A (en) |
KR (1) | KR100743203B1 (en) |
CN (1) | CN1408046A (en) |
AT (1) | ATE296393T1 (en) |
AU (1) | AU3628701A (en) |
BR (1) | BR0108793A (en) |
CA (1) | CA2397154C (en) |
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MX (1) | MXPA02008332A (en) |
NO (1) | NO20024151L (en) |
PL (1) | PL358010A1 (en) |
RU (1) | RU2247219C2 (en) |
SE (1) | SE515195C2 (en) |
WO (1) | WO2001065058A1 (en) |
ZA (1) | ZA200205332B (en) |
Cited By (6)
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WO2007071624A1 (en) * | 2005-12-23 | 2007-06-28 | Vallourec Mannesmann Oil & Gas France | External protection for expanding tubular threaded joints |
US20100140929A1 (en) * | 2007-06-05 | 2010-06-10 | Sandvik Intellectual Property Ab | Rock-drilling equipment as well as female and male parts therefor |
WO2011002399A1 (en) * | 2009-07-01 | 2011-01-06 | Atlas Copco Rock Drills Ab | Device and method for protecting the rock drilling machine from corrosion |
US20150115185A1 (en) * | 2012-06-28 | 2015-04-30 | Westport Power Inc. | Fluid Flow Regulating Device Having High Resistance To Corrosion |
EP4183975A1 (en) * | 2021-11-19 | 2023-05-24 | Sandvik Mining and Construction Tools AB | Thread pitch |
EP4299875A1 (en) * | 2022-06-30 | 2024-01-03 | Sandvik Mining and Construction Tools AB | Laser cladded rods or tubes for percussive drilling |
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Publication number | Priority date | Publication date | Assignee | Title |
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GB0130967D0 (en) | 2001-12-24 | 2002-02-13 | Hunting Oilfield Services Ltd | Anti galling threaded joint |
AU2003220700B2 (en) * | 2002-02-25 | 2007-09-06 | Steffen, Robertson & Kirsten (South Africa) (Pty) Ltd And William David Ortlepp | Rock bolt |
SE520077C2 (en) * | 2002-06-27 | 2003-05-20 | Sandvik Ab | Male part for percussion drilling of rock, has threaded end section with specific geometry adjacent to stop surface |
JP2007211932A (en) * | 2006-02-10 | 2007-08-23 | Mitsubishi Heavy Ind Ltd | Thread fastening member and method of manufacturing the same |
RU2008149702A (en) * | 2006-05-17 | 2010-06-27 | Сандвик Интеллекчуал Проперти Аб (Se) | UPPER COLLISION TOOL FOR STONE DRILLING, DRILL ROD AND CONNECTING SLEEVE |
FR2923283B1 (en) | 2007-11-07 | 2012-10-05 | Vallourec Mannesmann Oil & Gas | THREADED JOINT COMPRISING AT LEAST ONE THREADED ELEMENT WITH EXTREMITY LIP FOR METAL TUBE. |
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Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2392033A (en) * | 1941-11-01 | 1946-01-01 | Bethlehem Steel Corp | Sucker rod coupling with zinc inserts |
US2955847A (en) * | 1957-01-08 | 1960-10-11 | Kennametal Inc | Cemented carbide drill rod pipe coupling having a replaceable wear element |
US3251427A (en) * | 1963-10-02 | 1966-05-17 | Exxon Production Research Co | Protection of drill pipe |
US3709306A (en) * | 1971-02-16 | 1973-01-09 | Baker Oil Tools Inc | Threaded connector for impact devices |
ZA785370B (en) * | 1978-09-21 | 1979-11-28 | Boart Int Ltd | Thread structure for percussion drill elements |
SE459681B (en) * | 1985-01-07 | 1989-07-24 | Santrade Ltd | DRILLING ELEMENT BEFORE SHOCK DRILLING |
US4688828A (en) * | 1986-04-02 | 1987-08-25 | Shaffer Donald U | Tubing joint for corrosion protection |
SE460301B (en) * | 1986-10-15 | 1989-09-25 | Sandvik Ab | CUTTING ROD FOR STOCKING DRILLING MACHINE |
JPS63293384A (en) * | 1987-05-27 | 1988-11-30 | 住友金属工業株式会社 | Frp pipe with screw coupling |
US5678698A (en) * | 1996-03-22 | 1997-10-21 | Cabral; Derek L. | Baseball bat rack for baseball hats and related articles |
-
2000
- 2000-03-02 SE SE0000701A patent/SE515195C2/en not_active IP Right Cessation
-
2001
- 2001-02-21 BR BR0108793-2A patent/BR0108793A/en not_active Application Discontinuation
- 2001-02-21 WO PCT/SE2001/000382 patent/WO2001065058A1/en active IP Right Grant
- 2001-02-21 RU RU2002122739/03A patent/RU2247219C2/en not_active IP Right Cessation
- 2001-02-21 CN CN01805901A patent/CN1408046A/en active Pending
- 2001-02-21 EP EP01908544A patent/EP1259703B1/en not_active Expired - Lifetime
- 2001-02-21 CA CA002397154A patent/CA2397154C/en not_active Expired - Fee Related
- 2001-02-21 JP JP2001563735A patent/JP2003525373A/en active Pending
- 2001-02-21 AU AU36287/01A patent/AU3628701A/en not_active Abandoned
- 2001-02-21 AT AT01908544T patent/ATE296393T1/en active
- 2001-02-21 DE DE60111024T patent/DE60111024D1/en not_active Expired - Lifetime
- 2001-02-21 PL PL01358010A patent/PL358010A1/en unknown
- 2001-02-21 KR KR1020027011360A patent/KR100743203B1/en not_active IP Right Cessation
- 2001-02-21 MX MXPA02008332A patent/MXPA02008332A/en unknown
- 2001-03-02 US US09/796,364 patent/US6334493B2/en not_active Expired - Fee Related
-
2002
- 2002-07-03 ZA ZA200205332A patent/ZA200205332B/en unknown
- 2002-08-30 NO NO20024151A patent/NO20024151L/en not_active Application Discontinuation
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US9352461B2 (en) | 2009-07-01 | 2016-05-31 | Atlas Copco Rock Drills Ab | Device and method for protecting the rock drilling machine from corrosion |
US20150115185A1 (en) * | 2012-06-28 | 2015-04-30 | Westport Power Inc. | Fluid Flow Regulating Device Having High Resistance To Corrosion |
EP4183975A1 (en) * | 2021-11-19 | 2023-05-24 | Sandvik Mining and Construction Tools AB | Thread pitch |
WO2023088939A1 (en) * | 2021-11-19 | 2023-05-25 | Sandvik Mining And Construction Tools Ab | Thread pitch |
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Also Published As
Publication number | Publication date |
---|---|
RU2247219C2 (en) | 2005-02-27 |
RU2002122739A (en) | 2004-01-20 |
MXPA02008332A (en) | 2003-02-12 |
BR0108793A (en) | 2002-12-31 |
CA2397154C (en) | 2009-07-07 |
PL358010A1 (en) | 2004-08-09 |
US6334493B2 (en) | 2002-01-01 |
KR20020086592A (en) | 2002-11-18 |
EP1259703B1 (en) | 2005-05-25 |
NO20024151D0 (en) | 2002-08-30 |
ZA200205332B (en) | 2003-10-03 |
DE60111024D1 (en) | 2005-06-30 |
CN1408046A (en) | 2003-04-02 |
SE0000701D0 (en) | 2000-03-02 |
SE0000701L (en) | 2001-06-25 |
JP2003525373A (en) | 2003-08-26 |
EP1259703A1 (en) | 2002-11-27 |
CA2397154A1 (en) | 2001-09-07 |
NO20024151L (en) | 2002-10-30 |
ATE296393T1 (en) | 2005-06-15 |
AU3628701A (en) | 2001-09-12 |
WO2001065058A1 (en) | 2001-09-07 |
SE515195C2 (en) | 2001-06-25 |
KR100743203B1 (en) | 2007-07-27 |
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