CA1144435A - Hard surfacing for oil well tools - Google Patents
Hard surfacing for oil well toolsInfo
- Publication number
- CA1144435A CA1144435A CA000342902A CA342902A CA1144435A CA 1144435 A CA1144435 A CA 1144435A CA 000342902 A CA000342902 A CA 000342902A CA 342902 A CA342902 A CA 342902A CA 1144435 A CA1144435 A CA 1144435A
- Authority
- CA
- Canada
- Prior art keywords
- layer
- steel
- tungsten carbide
- sintered
- tool
- 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.)
- Expired
Links
- 239000003129 oil well Substances 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 59
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000010937 tungsten Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 229910001339 C alloy Inorganic materials 0.000 claims 1
- 229910001080 W alloy Inorganic materials 0.000 claims 1
- 239000002355 dual-layer Substances 0.000 claims 1
- 238000010891 electric arc Methods 0.000 claims 1
- 239000011261 inert gas Substances 0.000 claims 1
- 238000004901 spalling Methods 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 239000002923 metal particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- COLZOALRRSURNK-UHFFFAOYSA-N cobalt;methane;tungsten Chemical compound C.[Co].[W] COLZOALRRSURNK-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/025—Connecting cutting edges or the like to tools; Attaching reinforcements to workpieces, e.g. wear-resisting zones to tableware
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/327—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C comprising refractory compounds, e.g. carbides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/002—Drill-bits
Abstract
ABSTRACT OF THE DISCLOSURE
A method is disclosed for applying to rotating well drilling parts such as tool joints a multiple layer of hardbanding materials to provide extended wear service for the well tools without incurring any of the accompanying spalling normally associated with heavy layers of hardbanding.
A method is disclosed for applying to rotating well drilling parts such as tool joints a multiple layer of hardbanding materials to provide extended wear service for the well tools without incurring any of the accompanying spalling normally associated with heavy layers of hardbanding.
Description
3~
HARD_SURrACING FOR _IL WELL TOOL.S
~CKGROUND or _THE _IN~ENTION
During the drilling operations when a borehole is drilled through underground formations the drill string undergoes considerable abrasion during rotation within the borehole and/
or the well casing. The abrasion is amplified when -the drilling mud contains abrasive t`ormation particles being t'lushed out oF the drilling area by the drilling mud. The wear resulting from -this abrasion often occurs on the shouldered o areas of the tool joir1ts and contributes greatly to a very rapid failure of the high'1y stressed thread areas of said tool joints.
Methods of slowing or reducing this wear involved fusing a layer of cast tungsten carbide particles in an alloy steel matrix. This resulted in an extended useful life of the tool join-t but in many instances gave rise to a second detrimental effect which was a higher -than normal rate of wear on -the inside of the well casing. Later, it WdS found that a layer of mild steel alloy on top of a layer of large sintered o tungsten carbide particles would greatly reduce the wear in the casing while extending the life of the tool joint. When ot'fshore drilling became very prevalent in the industry, the single hardbanding procedure and the hardbanding procedure with a mild steel overlay resulted in an extended life for the tool ~joint which, -though better than a p'lain steel joint, still left a lot to be desired.
Due to the expense and time involved in pulling dril'ling stri1lg;, from o-ffshore wells and shuttling new or resurfaced dri'11 string components to the site from somewt1ere onshore9 ~O the wear and tear on drill strings became an even greater ~ ' ~
consider(ltion. Attempted solutions involved placing thicker bands of hclrd surfacing materia] on the tool joints.
Unfortunately, l-his failed to solve the problem since the cast tungsten carbide particles are extremely brittle and therefore subject to spalling. Spalling is the failure of a hard brittle material during high point loading in compression.
The present invention provides a much thicker hardbanding applica-tion with accompanying extended life of the tool joint without increased susceptibility to failure due to spalling.
The invention in one aspect pertains to a method of applying a hard surface material to a drill pipe comprising the steps of welding to the surface of the drill pipe, a layer of sintered tungsten carbide particles in a steel alloy matrix, welding a second layer of sintered tungsten carbide particles in a steel matrix ontc) the first layer, and applying a third layer of mild steel to the second layer thereby forming an exterior surface having an allcy of tungsten, carbon, and steel.
The invention also compre}lends a well tool having surface wear properties enhanced by hard me-tal banding, the tool comprlsing cl generally cylindrical steel tool body, a first layer of hardbal-lding material fused to the body, with the first layer comprising large particles of sintered tungsten carbide in a mild steel mat:rix. A second layer of hardbanding material is on top of the first layer, the second layer comprising sintered tungsten carbide particles in a mild steel matrix. A
third :layer of mild steel alloy is on top of the second layer,
HARD_SURrACING FOR _IL WELL TOOL.S
~CKGROUND or _THE _IN~ENTION
During the drilling operations when a borehole is drilled through underground formations the drill string undergoes considerable abrasion during rotation within the borehole and/
or the well casing. The abrasion is amplified when -the drilling mud contains abrasive t`ormation particles being t'lushed out oF the drilling area by the drilling mud. The wear resulting from -this abrasion often occurs on the shouldered o areas of the tool joir1ts and contributes greatly to a very rapid failure of the high'1y stressed thread areas of said tool joints.
Methods of slowing or reducing this wear involved fusing a layer of cast tungsten carbide particles in an alloy steel matrix. This resulted in an extended useful life of the tool join-t but in many instances gave rise to a second detrimental effect which was a higher -than normal rate of wear on -the inside of the well casing. Later, it WdS found that a layer of mild steel alloy on top of a layer of large sintered o tungsten carbide particles would greatly reduce the wear in the casing while extending the life of the tool joint. When ot'fshore drilling became very prevalent in the industry, the single hardbanding procedure and the hardbanding procedure with a mild steel overlay resulted in an extended life for the tool ~joint which, -though better than a p'lain steel joint, still left a lot to be desired.
Due to the expense and time involved in pulling dril'ling stri1lg;, from o-ffshore wells and shuttling new or resurfaced dri'11 string components to the site from somewt1ere onshore9 ~O the wear and tear on drill strings became an even greater ~ ' ~
consider(ltion. Attempted solutions involved placing thicker bands of hclrd surfacing materia] on the tool joints.
Unfortunately, l-his failed to solve the problem since the cast tungsten carbide particles are extremely brittle and therefore subject to spalling. Spalling is the failure of a hard brittle material during high point loading in compression.
The present invention provides a much thicker hardbanding applica-tion with accompanying extended life of the tool joint without increased susceptibility to failure due to spalling.
The invention in one aspect pertains to a method of applying a hard surface material to a drill pipe comprising the steps of welding to the surface of the drill pipe, a layer of sintered tungsten carbide particles in a steel alloy matrix, welding a second layer of sintered tungsten carbide particles in a steel matrix ontc) the first layer, and applying a third layer of mild steel to the second layer thereby forming an exterior surface having an allcy of tungsten, carbon, and steel.
The invention also compre}lends a well tool having surface wear properties enhanced by hard me-tal banding, the tool comprlsing cl generally cylindrical steel tool body, a first layer of hardbal-lding material fused to the body, with the first layer comprising large particles of sintered tungsten carbide in a mild steel mat:rix. A second layer of hardbanding material is on top of the first layer, the second layer comprising sintered tungsten carbide particles in a mild steel matrix. A
third :layer of mild steel alloy is on top of the second layer,
2-, ~
~4~35 the third layer applied by heat process whereby tunysten from the second layer alloys with the mild steel of the third layer to form a third layer of tungsten, carbon and steel.
Utilizing multiple layers of sintered tungsten carbide particles in a steel matrix provides a thicker overall surface of hardbanding material while -the tougher sintered tungsten carbide particles are resistant to spalling. The third layer provides extra resistance to spalling and provides abrasive wear protec-tion to the inside of the well casing.
BRIEF DESCRIPTION OF THE DRAWINGS
~ _ . . .
Figure 1 is a partial cross-sectional view of a tool joint made according to the present invention.
Figure 2 is a second embodiment of the invention.
Figure 3 is a graph illustrating the improved wear characteristics of the inven-tion.
DESCRIPTION OE~'_TI~E PREFFRRED EMBODIMENTS
Referring to the Figure 1, a typical tool ~Oillt section 10 comprising a body 12 having a box end 16 with internal threads ]8 is manufactured according to normal tool joint technology.
A hardbanding yroove is formed a-t 26 along the wear susceptible shoulder of -the -tool joint extending over a considerable portion of the tool joint length. The groove 26 may be formed during the ma]cing of the tool joint or can be machined in-to the finished tool joint at any time prior to the application of the hard metal layers. The hard metal layers are usually applied in five individual side-by-side passes of a welding machine.
:,, .- -~.
The tool join~ is rigged up in a rotating fixture in close proximity to the MIG welding machine. The welding process is started with tbe gas-blallketed electro(Ie cons-istill(3 of a mild steel wire forminy a puddle at one end of -the hard surface groove 26. The tool joint is rotated beneath the welding electrode and the large tungsten carbide particles are poured into the weld puddle formed by the electrode. Due to the high temperatures in the proximity to the electrode it is preferable that the large particles be placed near the back end of the weld puddle near its cooling edge.
The hard metal particles comprise large sintered tungsten carbide par-ticles with cobalt or other sui-table metallic binder. Preferably the ratio of tungsten carbide to steel in the deposit is in the range of 60% tungsten carbide and 40~
steel. The size of the particle is a 14-20 mesh size. This size particle will pass through a 14 mesh schreen but will be retained on a 20 mesh screen. The range of acceptable parameters is 40 to 65% tungsten carbide with 60 to 35~
steel. The size of` tlle cobalt-tungsten carbide particles preferable ranges tronl about 10 mesh to abolJt 2~ mesh.
Each pass of -the electrode around the tool joint is approximately 3/32 inch thick and about 3/4 of an inch wide.
Thus a total initial hardbanding layer next to the tool joint will be five passes of the welding rod side by side with a resulting hardband approximately 3.75 inches wide and
~4~35 the third layer applied by heat process whereby tunysten from the second layer alloys with the mild steel of the third layer to form a third layer of tungsten, carbon and steel.
Utilizing multiple layers of sintered tungsten carbide particles in a steel matrix provides a thicker overall surface of hardbanding material while -the tougher sintered tungsten carbide particles are resistant to spalling. The third layer provides extra resistance to spalling and provides abrasive wear protec-tion to the inside of the well casing.
BRIEF DESCRIPTION OF THE DRAWINGS
~ _ . . .
Figure 1 is a partial cross-sectional view of a tool joint made according to the present invention.
Figure 2 is a second embodiment of the invention.
Figure 3 is a graph illustrating the improved wear characteristics of the inven-tion.
DESCRIPTION OE~'_TI~E PREFFRRED EMBODIMENTS
Referring to the Figure 1, a typical tool ~Oillt section 10 comprising a body 12 having a box end 16 with internal threads ]8 is manufactured according to normal tool joint technology.
A hardbanding yroove is formed a-t 26 along the wear susceptible shoulder of -the -tool joint extending over a considerable portion of the tool joint length. The groove 26 may be formed during the ma]cing of the tool joint or can be machined in-to the finished tool joint at any time prior to the application of the hard metal layers. The hard metal layers are usually applied in five individual side-by-side passes of a welding machine.
:,, .- -~.
The tool join~ is rigged up in a rotating fixture in close proximity to the MIG welding machine. The welding process is started with tbe gas-blallketed electro(Ie cons-istill(3 of a mild steel wire forminy a puddle at one end of -the hard surface groove 26. The tool joint is rotated beneath the welding electrode and the large tungsten carbide particles are poured into the weld puddle formed by the electrode. Due to the high temperatures in the proximity to the electrode it is preferable that the large particles be placed near the back end of the weld puddle near its cooling edge.
The hard metal particles comprise large sintered tungsten carbide par-ticles with cobalt or other sui-table metallic binder. Preferably the ratio of tungsten carbide to steel in the deposit is in the range of 60% tungsten carbide and 40~
steel. The size of the particle is a 14-20 mesh size. This size particle will pass through a 14 mesh schreen but will be retained on a 20 mesh screen. The range of acceptable parameters is 40 to 65% tungsten carbide with 60 to 35~
steel. The size of` tlle cobalt-tungsten carbide particles preferable ranges tronl about 10 mesh to abolJt 2~ mesh.
Each pass of -the electrode around the tool joint is approximately 3/32 inch thick and about 3/4 of an inch wide.
Thus a total initial hardbanding layer next to the tool joint will be five passes of the welding rod side by side with a resulting hardband approximately 3.75 inches wide and
3/32 to 1/8 inch thick. After the welding has been performed to provide the initial layer the welder is indexed back ~o the starting point and repeats the same process for the second layer.
~1~4~35 The second layer of hardbanding material also colnprises large sintered tungsten carbide particles in a mild steel matrix applied in thicknesses of approxin~(ltely 3/32 to 1/~
inch thick. The same metallurgical composition of the hard metal particles and the binders are utilized in the second pass; however, the percentage of tungsten carbide partic'les in the second layer will be higher than in the first layer.
The weld penetration is into the first layer (containing 40% steel), whereas the first layer penetration is into the tool joint surface, which is 100% steel. Tilerefore, the second layer will provide more wear protection than the usual single layer hard surfacing application.
Applying two layers of hardbanding material results in a total thickness of the hardsurfacing material in the range of 7/32 to 9/32 inch. In the prior art the maximum practical hardsurfacing thickness usually did not exceed 3/16 of an inch without suffering considerable spalling failure.
In addition to the double layer hardsurfacing descrihed above, an alternate embodinlent would be the applicatiorl of a third layer of n~ilcl steel on top of the second 'layer of sintered tungsten carbide in a steel matrix. The application of the third layer of mild steel results in an alloying of the steel with the tungsten and carbon to arrive at a relatively hard third layer which is extra-resistant to spalling and failure and which will provide abrasive wear protection to the inside of the casing.
Although a specific preferred embodilllent of the present invention has been described in the detailed description above, the description is not in-tended to limit the invention to the particular forms or embodilllents disclosed thereill since they are to be recognized as illustrative rather than restrictive and it would be obvious to those skilled in the art that the invention is not so limited. Tllus, the invention is declared to cover all changes and modifications of the specific example of the invention herein disclosed for the purposes of illustration which do not constitute departure from the spirit and scope of the invention.
~1~4~35 The second layer of hardbanding material also colnprises large sintered tungsten carbide particles in a mild steel matrix applied in thicknesses of approxin~(ltely 3/32 to 1/~
inch thick. The same metallurgical composition of the hard metal particles and the binders are utilized in the second pass; however, the percentage of tungsten carbide partic'les in the second layer will be higher than in the first layer.
The weld penetration is into the first layer (containing 40% steel), whereas the first layer penetration is into the tool joint surface, which is 100% steel. Tilerefore, the second layer will provide more wear protection than the usual single layer hard surfacing application.
Applying two layers of hardbanding material results in a total thickness of the hardsurfacing material in the range of 7/32 to 9/32 inch. In the prior art the maximum practical hardsurfacing thickness usually did not exceed 3/16 of an inch without suffering considerable spalling failure.
In addition to the double layer hardsurfacing descrihed above, an alternate embodinlent would be the applicatiorl of a third layer of n~ilcl steel on top of the second 'layer of sintered tungsten carbide in a steel matrix. The application of the third layer of mild steel results in an alloying of the steel with the tungsten and carbon to arrive at a relatively hard third layer which is extra-resistant to spalling and failure and which will provide abrasive wear protection to the inside of the casing.
Although a specific preferred embodilllent of the present invention has been described in the detailed description above, the description is not in-tended to limit the invention to the particular forms or embodilllents disclosed thereill since they are to be recognized as illustrative rather than restrictive and it would be obvious to those skilled in the art that the invention is not so limited. Tllus, the invention is declared to cover all changes and modifications of the specific example of the invention herein disclosed for the purposes of illustration which do not constitute departure from the spirit and scope of the invention.
Claims (7)
1. A method of applying a hard surface material to a drill pipe comprising the steps of welding to the surface of the drill pipe, a layer of sintered tungsten carbide particles in a steel alloy matrix, welding a second layer of sintered tungsten carbide particles in a steel matrix onto said first layer, and applying a third layer of mild steel to said second layer thereby forming an exterior surface having an alloy of tungsten, carbon, and steel.
2. The method of claim 1 wherein said welding step comprises welding by metal inert gas electrode welding and applying sintered tungsten carbide particles in the molten weld material.
3. The method of claim 1 or claim 2 wherein said sintered carbide particles comprise tungsten carbide sintered in a metal binder, said sintered tungsten carbide particles being of a size to pass through a 10 mesh screen and be retained on a 24 mesh screen.
4. A method of applying a hard metal banding to a steel cylindrical tool joint surface, said method comprising the steps of (a) forming a channel in said tool joint surface to receive hard metal banding, (b) rotating said surface in relation to an arc welding machine while applying through an electric arc a weld material comprising an alloy steel, (c) feeding sintered tungsten carbide particles into the molten weld during said welding operation in the ratio of from 40 to 65 percent sintered tungsten carbide to 60 to 35 percent steel, repeating steps (b) and (c) above on a second layer to form a dual layer of sintered tungsten carbide steel hardbanding to said cylindrical surface, and the additional locating of a third layer of alloy steel weld on said second layer to provide a steel alloy composition third layer having tungsten, carbon, and steel therein.
5. A well tool having surface wear properties enhanced by hard metal banding, said tool comprising a generally cylindrical steel tool body, a first layer of hardbanding material fused to said body, said first layer comprising large particles of sintered tungsten carbide in a mild steel matrix, a second layer of hardbanding material on top of said first layer, said second layer comprising sintered tungsten carbide particles in a mild steel matrix, and a third layer of mild steel alloy on top of said second layer, said third layer applied by heat process whereby tungsten from said second layer alloys with the mild steel of said third layer to form a third layer of tungsten, carbon and steel.
6. The well tool of claim 5 wherein said sintered tungsten carbide particles originally comprised tungsten carbide sintered in a metal binder having a size in the range of 10 mesh to 24 mesh wherein said layers comprised from 40 to 65% tungsten carbide and from 60 to 35% steel alloy.
7. The well tool of claim 5 or 6 wherein said tool both has a channel formed therein in which at least a portion of said first layer is received.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709079A | 1979-01-29 | 1979-01-29 | |
| US007,090 | 1979-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1144435A true CA1144435A (en) | 1983-04-12 |
Family
ID=21724164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000342902A Expired CA1144435A (en) | 1979-01-29 | 1980-01-02 | Hard surfacing for oil well tools |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1144435A (en) |
| GB (1) | GB2041275B (en) |
| MX (1) | MX155246A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2126512A (en) * | 1982-08-26 | 1984-03-28 | Hoverdale Engineering Limited | Method of hard-surfacing |
| US4745254A (en) * | 1983-12-05 | 1988-05-17 | Funk Charles F | Method of hard-facing a metal surface |
| US4837417A (en) * | 1983-12-05 | 1989-06-06 | Funk Charles F | Method of hard-facing a metal surface |
| GB2490924B (en) * | 2011-05-18 | 2013-07-10 | Volnay Engineering Services Ltd | Improvements in and relating to downhole tools |
-
1979
- 1979-12-14 MX MX180541A patent/MX155246A/en unknown
-
1980
- 1980-01-02 CA CA000342902A patent/CA1144435A/en not_active Expired
- 1980-01-22 GB GB8002041A patent/GB2041275B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| MX155246A (en) | 1988-02-08 |
| GB2041275B (en) | 1983-07-20 |
| GB2041275A (en) | 1980-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4277108A (en) | Hard surfacing for oil well tools | |
| CA1114691A (en) | Surface smoothed tool joint hardfacing | |
| US5755299A (en) | Hardfacing with coated diamond particles | |
| US7361411B2 (en) | Hardfacing alloy, methods, and products | |
| US6469278B1 (en) | Hardfacing having coated ceramic particles or coated particles of other hard materials | |
| CA1043325A (en) | Hard surfaced well tool and method of making same | |
| US5921330A (en) | Rock bit with wear-and fracture-resistant hardfacing | |
| US4944774A (en) | Hard facing for milled tooth rock bits | |
| US20100071961A1 (en) | Bit leg outer surface processing using friction stir welding (fsw) | |
| US8763881B2 (en) | Methods of hardbanding joints of pipe using friction stir welding | |
| US7823664B2 (en) | Corrosion protection for head section of earth boring bit | |
| US4666797A (en) | Wear resistant facings for couplings | |
| US20090258250A1 (en) | Balanced Composition Hardfacing Alloy | |
| US20100000798A1 (en) | Method to reduce carbide erosion of pdc cutter | |
| US20100038408A1 (en) | Methods of treating hardbanded joints of pipe using friction stir processing | |
| RU2167262C2 (en) | Process of surfacing with hard alloy with coated diamond particles ( versions ), filler rod for surfacing with hard alloy, cone drill bit for rotary drilling | |
| WO2001096618A1 (en) | Hardfacing alloy, methods, and products | |
| WO2008042329B1 (en) | Particle matrix composite drill bits with hardfacing and methods of manufacturing and repairing such drill bits using hardfacing materials | |
| RU2618025C2 (en) | Method for recovery or strengthening of drilling bit cutter pockets, method for forming a drilling bit cutter pocket and drilling bit blades | |
| US5791423A (en) | Earth-boring bit having an improved hard-faced tooth structure | |
| CA2872371C (en) | Method of hardbanding a tubular component and a tubular component hardbanded in accordance with the method | |
| CA1195345A (en) | Powder mixtures for wear resistant facings and products produced therefrom | |
| US20110079446A1 (en) | Earth-boring tools and components thereof and methods of attaching components of an earth-boring tool | |
| CA1144435A (en) | Hard surfacing for oil well tools | |
| US20110073233A1 (en) | Method of Applying Hardfacing Sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |