US3923469A - One-fold unitary steel sucker rod string - Google Patents
One-fold unitary steel sucker rod string Download PDFInfo
- Publication number
- US3923469A US3923469A US539826A US53982675A US3923469A US 3923469 A US3923469 A US 3923469A US 539826 A US539826 A US 539826A US 53982675 A US53982675 A US 53982675A US 3923469 A US3923469 A US 3923469A
- Authority
- US
- United States
- Prior art keywords
- string
- sucker rod
- rod string
- inch
- coil
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 abstract description 8
- 229910000734 martensite Inorganic materials 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000005242 forging Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000428199 Mustelinae Species 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12333—Helical or with helical component
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
Definitions
- ABSTRACT Mill coils of steel sucker rod are joined end to end by flash butt welding and straighened to form a rod string.
- the string is heated in less than 60 seconds to above its Ac temperature to convert ferritic grain structure to austenitic structure. It is hot rolled to deform its circular cross section to oval form.
- the ovalled rod is then quenched to 600C and slowly cooled to room temperature to avoid development of martensite.
- the string is then coiled with its minor diameter in the coil plane without stressing the steel beyond its .2% offset yield.
- the product is a continuous ovalled sucker rod string in coiled form particularly adapted to be transported.
- This invention relates to a continuous sucker rod string ovalled from a heat treated round sucker rod string and coiled for transport and use.
- a large proportion of oil wells are equipped with bottom hole pumps which pump oil to surface through a string of tubing.
- the pump is actuated by reciprocation of a string of sucker rods attached to the pump and contained within the tubing.
- the string of sucker rods may be thousands of feet in length. It is made up of a large number of individual sucker rods joined end to end. Each sucker rod is about 30 feet long and has pin and box couplings at its ends for connection with other rods.
- sucker rod manufacturer It is customary for a sucker rod manufacturer to purchase relatively coarse grained steel rod from a steel mill and treat it to produce a finished product having a fine grain size.
- the sucker rod from a mill usually has a grain size equivalent No. 5 to No. 7 on the ASTM grain size chart.
- the manufacturer normalizes and tempers this material to produce an end product having a grain size equivalent to No. 8 to No. 9 on the chart.
- This grain refinement is carried out to imbue the sucker rod with good yield strength (in the order of 65,00075,000 psi for 13/16 inch diameter rod) and resistance to fatigue and corrosion failure. These qualities are needed because the sucker rods, particularly those used in the upper end of the string, are subjected to heavy cyclic loading in use.
- This apparatus is comprised of a pulling unit and a storing unit.
- the pulling unit includes a pair of opposed endless tracks which can be positioned over the well head and friction grip the rod between them. The tracks are driven to pull or feed the rod string out of or into the well.
- the storing unit comprises a horizontal, rotatable, circular channel or reel into which the rod string is fed as it comes out of the well. The channel forms the string into a large coil; the channels inner diameter is of sufficient size so that the rod string 2 is not stressed beyond its 0.2% offset yield when so coiled.
- a further object is to produce such a string having good yield strength and fatigue and corrosion resistance properties.
- Another object is to produce such a onefold sucker rod string having a grain size no larger than No. 8 on the ASTM grain size chart.
- the invention comprises a coiled, continuous sucker rod string of oval cross section fabricated by rapidly heating a segment of a onefold, i.e., continuous, steel sucker rod string or like elongate article to above its Ac temperature to convert its ferritic or body centered cubic grain structure to the austenitic or face centered cubic form.
- the heating step is terminated before the segment reaches a temperature at which the austenite grains coarsen rapidly; additionally, the segment can be worked, as by stretching, during heating to aid in the retarding of grain growth.
- the segment is hot worked to deform its circular cross section to an oval form. Hot working has the additional benefit of minimizing austenitic grain growth.
- the segment is then cooled.
- the segment is rapidly cooled, as by quenching, to a temperature within the range 600-700F. Following this rapid cooling, the segment is slowly cooled to room temperature. During cooling, the austenitic structure is converted to a ferritic structure, which is the room temperature structure. By cooling rapidly, grain growth is minimized. By changing to slow cooling at a temperature above about 600F, martensite development is minimized.
- the foregoing procedure is repeated for the other segments of the string; usually the string will be run through a processing line and the various operations carried out in sequence.
- the string is coiled with its minor diameter in the coil plane; coiling is done without permanently stressing the rod material beyond its 0.2% offset yield.
- the string is reheated to a temperature less than its Ac temperature to relieve residual stresses and to convert any residual austenite to ferrite. It is then shot-blasted to clean it and to place its surface into compression.
- the product is a onefold steel sucker rod string or like article having an oval cross section.
- the string is coiled so that its minor diameter is in the coil plane.
- the grain size of the steel is smaller than No. 8 on the ASTM chart.
- the string usually many thou- 3 sands of feet in length, is in a preferred condition for transport to a well site.
- FIG. 1 is an iron carbon diagram for typical rod steels showing the preferred temperature to which we heat the material during the conversion step and the preferred tempering temperature range.
- FIG. 2 is an equilibrium diagram showing the changes in structure which occur within a particular rod steel; curves 1 (temperature at the rod surface) and 2 (temperature at the rods center) represent the cooling curves which are preferred.
- FIG. 3 is a schematic representation of the coiled, ovalled, continuous sucker rod string of the invention.
- FIG. 4 is a cross section of the sucker rod string of FIG. 3.
- the steels suitable for grain refinement by the process by which the sucker rod strings of the invention are fabricated are all those which are hardenable by heat treatment, are ferritic rather than austenitic at room temperature, and become completely austenitic on heating to a suitable temperature.
- the invention will find application with other articles such as oil well steel tubing and tubular marcaroni strings which have a similar composition to that of the sucker rod steels.
- Sucker rod is customarily sold by steel mills in the form of small, permanently deformed coils having a diameter in the range of one-half inch in 1% inch and lengths of feet to feet as shown in Table 4 of manufacturers specifications of sucker rods in the July/August, 1969 issue of Petroleum Equipment. Therefore it is usually necessary to join the ends of a number of mill coils together and to straighten the composite product.
- the mill coils can be joined by flash butt welding. This is a known technique which combines resistance welding with forging.
- a flash butt welder includes a transformer. Power is fed to the primary winding of the transformer. One side of the secondary winding of the transformer is connected to a stationery platten having copper clamping jaws. The other side of the secondary winding is connected to a moveable platten, also equipped with clamping jaws. The two rod ends to be welded together are each clamped in one set of the jaws. The moveable platten is biased to bring the rod ends together, thereby causing a short circuit. As a result, flashing and an expulsion of metal from the contact area occurs. The flow of current through the resistive rod ends results in the generation of heat therein. In a moment the ends are soft enough to permit the travelling platten to cause forging to take place. Fusion and forging, taking place at the same time, weld the rod ends together securely.
- I modify the known procedure by treating the weld to re-orient its grain structure and remove hot cracks.
- I-Iot rolled steel has, of course, a grain structure which is oriented in the direction of rolling. Since the rod work piece is to be used in tension and compression, it is desirable that its grain structure be aligned along the rods longitudinal axis. During forging, the grain alignment of the rod ends is changed to a transverse position. This undesirable situation is aggravated by the fact that a temperature gradient exists from the weld interface along the rod ends during welding. As a result, forging occurs at portions of the rod ends which are at a temperature within the blue brittle range. When at temperatures within this range, the rod steel is susceptible to cracking. It is common to have cracks, referred to as hook cracks, in the rod surface adjacent the weld interface. These cracks are, of course, a defect.
- the joined coils are unreeled and straightened. This may be done by feeding the string through a conventional pinch roll and straightening roll section.
- the rod string is advanced to the heating or austenizing operation.
- the string is rapidly heated to above its AC3 temperature to convert the ferritic structure to austenite. I heat the steel to about 50 to 150F above the nominal Ac temperature for the particular composition.
- Rapid heating can be accomplished using an induction coil to raise the string to temperature in less than seconds.
- I pass the rod string through an induction coil of 36 inch length at 8 feet per minute.
- the coil is set to raise the temperature of the string to l550l750F, preferably 1650l700F.
- the Ac temperature of most sucker rod material is about l500F.
- I provide a desirable safety margin. Heating above 1750F is undesirable as rapid grain coarsening becomes a serious problem
- the rod string is worked, as by stretching, at the same time that it is heated. For
- the string may be friction gripped before reaching the induction coil with a pinch roll and stretched using an endless track assembly located down line from the coil.
- a pull of 18,000 psi is suitable when treating sucker rod.
- the string is hot worked, as by rolling. This is done primarily to oval it. As a result of being ovalled, the string can be formed without permanent deformation into a tighter coil than would otherwise be the case.
- hot rolling has the advantage of aiding in grain refinement.
- Ovalling can be carried out in a standard rolling mill stand and will pose no problem for one skilled in the art.
- the rod string is now cooled. This is done to convert the face centered cubic grain structure to body centered cubin form.
- the cooling operation is conducted in a manner which minimizes grain growth and martensite development. More specifically, the string is rapidly cooled, as by quenching with water. I cool in accordance with the cooling curve shown in FIG. 2. Rapid cooling is terminated while the nominal temperature of the rod is between 600 and 700F. This is done to avoid the development of any substantial amount of martensite. It will be appreciated that martensite is undesirable since it is a hard, brittle constituent whose presence in the string can deleteriously affect its working performance.
- the string is now in a condition suitable for coiling or further treatment.
- the finished rod string is formed into a coil with its minor diameter in the coil plane.
- the coil is ofa size such that the rod material is not stressed beyond its 0.2% offset yield.
- a foot 8 inch inside diameter coil frame will not stress a rod string, originally having a diameter of I 3/16 inches and formed of A151 1036 steel having a minor diameter of 0.610 inches, beyond its 0.2% offset yield.
- the product is a onefold steel sucker rod string of oval cross section formed into a coil with its minor diameter in the plane of the coil.
- a rod string having an original diameter of 13/16 inches and ovalled to 0.86 by 0.61 inches in accordance with the invention has an ultimate tensile strength of 140,000 psi.
- EXAMPLE I Eight coils of AISI 1036 13/16 inch outside diameter rod were flash butt welded end to end using a Taylor- Winfield model B-9 hand-operated flash butt welder equipped with a KVA transformer with 440 volt primary windingand approximately 4-7 volts across the secondary winding. As each weld was performed, the flash was removed by grinding. Grinding was continued so as to undercut below the nominal surface of the rod to provide a concave undercut of about threefourths inch in length and 1/32 inch depth at the deepest point. Each undercut weld was then re-heated in the welder to about 1700F and forged to increase its diameter to about seven-eights inch.
- the joined coils were unreeled and fed through a conventional pinch roll and straightening roll section to produce a substantially straight rod string.
- the rod string was fed at 8 feet per minute directly into a solenoid-type, 36 inches long induction coil having 44 turns of $4 X 541 inch rectangular copper tubing, the coil having an inside diameter of 2 Va inch.
- the coil was provided with single phase alternating current at 9600 cycles per second at approximately 400 volts. The coil was tuned to raise the temperature of the rod string to about 1650F.
- the string was continuously fed into a set of inch diameter ovalling rolls having a 1 inch radius concave contour to oval the strjng to 0.610 X 0.86 inch.
- the ovalled string was fed through a rotating quench head having four water nozzles. This head directed about 16 US. gallons per minute at the string, and reduced its temperature to about. 650F.
- the string was then cooled slowly to room temperature by exposing it to ambient conditions.
- the string was gripped upline with the pinch and ovalling rolls and downline with a track pulling unit to exert a pull of 18,000 psi on the string.
- the product was formed into a coil having an inner diameter of 15 feet 8 inches by feeding it into a rotating reel.
- the string was oval in shape, having a minor diameter of 0.610 inches and a major diameter of 0.86 inch.
- the grain size was about No. 9 on the ASTM grain size chart.
- the string which had been coiled with its minor diameter in the coil plane, was subsequently unreeled and found to be free of permanent bends. It was then tempered by again passing it through the induction coil at 12 feet per minute to raise its temperature to about 1250F. The string was slowly cooled to an ambient temperature using forced air and exposure to room conditions. During tempering, the string was stretched with an 18,000 psi pull.
- the string was passed through a conventional shot-blasting cleaning unit to remove scale and put its surface into residual compression. It was then coated with rust inhibitor.
- the string was coiled in the aforementioned reel with its minor diameter in the plane of the coil to provide a continuous product in a form ready for transportation.
- a onefold unitary steel sucker rod string produced from rods of circular cross section, between about three-fourths inch to about seven-eights inch in diameter to a rod having an oval cross section substantially completely throughout its length and formed into a tight coil, said string having a minor diameter of about 0.570 inch to about 0.670 inch in the coil plane, said coil being of sufficiently large inside diameter whereby the rod string is not stressed beyond its 0.2 offset yield.
- a continuous unitary sucker rod string several thousands of feet in length produced from rods of circular cross section of a diameter between about onehalf inch to about 1 /3 inches, said sucker rod string having an oval cross section substantially completely 8 throughout its length and being formed into a tight coil, said string having its minor diameter in the coil plane and said coil being of sufficiently large inside diameter whereby the rod string is not stressed beyond its 0.2 offset yield.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US539826A US3923469A (en) | 1972-09-01 | 1975-01-09 | One-fold unitary steel sucker rod string |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28557272A | 1972-09-01 | 1972-09-01 | |
US539826A US3923469A (en) | 1972-09-01 | 1975-01-09 | One-fold unitary steel sucker rod string |
Publications (1)
Publication Number | Publication Date |
---|---|
US3923469A true US3923469A (en) | 1975-12-02 |
Family
ID=26963265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US539826A Expired - Lifetime US3923469A (en) | 1972-09-01 | 1975-01-09 | One-fold unitary steel sucker rod string |
Country Status (1)
Country | Link |
---|---|
US (1) | US3923469A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5043217A (en) * | 1989-11-15 | 1991-08-27 | Westinghouse Electric Corp. | Composite to metal joint for torsional shafts |
US6481082B1 (en) | 2000-08-28 | 2002-11-19 | 768885 Alberta Ltd. | Portable continuous sucker rod manufacturing process |
WO2004002644A1 (en) * | 2002-06-28 | 2004-01-08 | Weatherford Canada Partnership | Method of manufacturing continuous sucker rod |
US20080229893A1 (en) * | 2007-03-23 | 2008-09-25 | Dayton Progress Corporation | Tools with a thermo-mechanically modified working region and methods of forming such tools |
US20090229417A1 (en) * | 2007-03-23 | 2009-09-17 | Dayton Progress Corporation | Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels |
EP2301879A2 (en) | 2009-09-28 | 2011-03-30 | Weatherford/Lamb, Inc. | Continuous rod transport system |
US20110072874A1 (en) * | 2009-09-28 | 2011-03-31 | Weatherford/Lamb, Inc. | Continuous Rod Transport System |
CN103277054A (en) * | 2013-06-06 | 2013-09-04 | 山东同创科技集团有限公司 | Sucker rod |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2400866A (en) * | 1941-11-08 | 1946-05-21 | United Drill And Tool Corp | Method of drawing metal stock |
US2563038A (en) * | 1948-05-27 | 1951-08-07 | Irwin Stanley | Paraffin remover |
US2880861A (en) * | 1954-07-09 | 1959-04-07 | Zig Zag Spring Company | Method and apparatus for producing a roll of wound spring wire and resulting product |
US3013793A (en) * | 1959-07-24 | 1961-12-19 | Joe H Howell | Sucker rod shock absorber |
US3231432A (en) * | 1964-10-08 | 1966-01-25 | Morgan Construction Co | Process for the quenching of hot rolled rods in direct sequence with rod mill |
US3504866A (en) * | 1968-05-06 | 1970-04-07 | Corod Mfg Ltd | Transport reel |
-
1975
- 1975-01-09 US US539826A patent/US3923469A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2400866A (en) * | 1941-11-08 | 1946-05-21 | United Drill And Tool Corp | Method of drawing metal stock |
US2563038A (en) * | 1948-05-27 | 1951-08-07 | Irwin Stanley | Paraffin remover |
US2880861A (en) * | 1954-07-09 | 1959-04-07 | Zig Zag Spring Company | Method and apparatus for producing a roll of wound spring wire and resulting product |
US3013793A (en) * | 1959-07-24 | 1961-12-19 | Joe H Howell | Sucker rod shock absorber |
US3231432A (en) * | 1964-10-08 | 1966-01-25 | Morgan Construction Co | Process for the quenching of hot rolled rods in direct sequence with rod mill |
US3504866A (en) * | 1968-05-06 | 1970-04-07 | Corod Mfg Ltd | Transport reel |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5043217A (en) * | 1989-11-15 | 1991-08-27 | Westinghouse Electric Corp. | Composite to metal joint for torsional shafts |
US6481082B1 (en) | 2000-08-28 | 2002-11-19 | 768885 Alberta Ltd. | Portable continuous sucker rod manufacturing process |
US20130140345A1 (en) * | 2002-06-28 | 2013-06-06 | Weatherford / Lamb, Inc. | Method of manufacturing continuous sucker rod |
WO2004002644A1 (en) * | 2002-06-28 | 2004-01-08 | Weatherford Canada Partnership | Method of manufacturing continuous sucker rod |
US20060150384A1 (en) * | 2002-06-28 | 2006-07-13 | Weatherford Canada Partnership | Method of manufacturing continuous sucker rod |
AU2003280435B2 (en) * | 2002-06-28 | 2007-11-15 | Weatherford Canada Partnership | Method of manufacturing continuous sucker rod |
US8839499B2 (en) * | 2002-06-28 | 2014-09-23 | Weatherford Canada Partnership | Method of manufacturing continuous sucker rod |
US8281472B2 (en) | 2002-06-28 | 2012-10-09 | Weatherford Canada Partnership | Method of manufacturing continuous sucker rod |
US20080229893A1 (en) * | 2007-03-23 | 2008-09-25 | Dayton Progress Corporation | Tools with a thermo-mechanically modified working region and methods of forming such tools |
US20090229417A1 (en) * | 2007-03-23 | 2009-09-17 | Dayton Progress Corporation | Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels |
US9132567B2 (en) * | 2007-03-23 | 2015-09-15 | Dayton Progress Corporation | Tools with a thermo-mechanically modified working region and methods of forming such tools |
US8968495B2 (en) | 2007-03-23 | 2015-03-03 | Dayton Progress Corporation | Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels |
US8864428B2 (en) | 2009-09-28 | 2014-10-21 | Weatherford/Lamb, Inc. | Continuous rod transport system |
US20110072874A1 (en) * | 2009-09-28 | 2011-03-31 | Weatherford/Lamb, Inc. | Continuous Rod Transport System |
US8869580B2 (en) | 2009-09-28 | 2014-10-28 | Weatherford/Lamb, Inc. | Continuous rod transport system |
US20110073552A1 (en) * | 2009-09-28 | 2011-03-31 | Weatherford/Lamb, Inc. | Continuous Rod Transport System |
EP2301879A2 (en) | 2009-09-28 | 2011-03-30 | Weatherford/Lamb, Inc. | Continuous rod transport system |
US9637038B2 (en) | 2009-09-28 | 2017-05-02 | Weatherford Technology Holdings, Llc | Continuous rod transport system |
US9873366B2 (en) | 2009-09-28 | 2018-01-23 | Weatherford Technology Holdings, Llc | Continuous rod transport system |
EP2447464A2 (en) | 2010-10-27 | 2012-05-02 | Weatherford/Lamb, Inc. | Continuous Rod Transport System |
AU2011236064B2 (en) * | 2010-10-27 | 2015-04-09 | Weatherford Technology Holdings, Llc | Continuous rod transport system |
CN103277054A (en) * | 2013-06-06 | 2013-09-04 | 山东同创科技集团有限公司 | Sucker rod |
CN103277054B (en) * | 2013-06-06 | 2015-12-09 | 山东同创科技集团有限公司 | A kind of sucker rod |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8839499B2 (en) | Method of manufacturing continuous sucker rod | |
US7459033B2 (en) | Oil country tubular goods excellent in collapse characteristics after expansion and method of production thereof | |
EP2778239B1 (en) | High performance material for coiled tubing applications and the method of producing the same | |
KR101967691B1 (en) | High-strength thick-walled electric-resistance-welded steel pipe for deep-well conductor casing, method for manufacturing the same, and high-strength thick-walled conductor casing for deep wells | |
US3923469A (en) | One-fold unitary steel sucker rod string | |
US11833561B2 (en) | Method of manufacturing a coiled tubing string | |
US3535484A (en) | Method of improving physical properties of electric resistance welded steel pipe | |
US3689326A (en) | Process for making continuous metal members such as sucker rod strings | |
US20070267110A1 (en) | Method for making high-strength steel pipe, and pipe made by that method | |
CA1041883A (en) | Method for producing a high tensile strength and high toughness bend pipe | |
US3979231A (en) | Method for producing large diameter steel pipes | |
JP2008513604A (en) | Method for extending the life of thin tube materials and austempered stress-relieved thin tube materials | |
CN1147019A (en) | Bluing and low-carbon martensite heat treatment of high strength building steel bar | |
JP3118623B2 (en) | Method for producing non-heat treated electric resistance welded oil well pipe having tensile strength of 800 MPa or more | |
JPS60238418A (en) | Manufacture of sucker rod for wet environment containing gaseous carbon dioxide | |
JPS6411086B2 (en) | ||
JP3491339B2 (en) | Manufacturing method of high tension electric resistance welded steel pipe | |
SU556004A1 (en) | Surfacing method | |
JPH08120346A (en) | Production of welded steel pipe for oil well excellent in sulphide corrosion cracking resistance | |
US20230392224A1 (en) | Linepipe Steel With Enhanced Sulfide Stress Cracking Resistance | |
CN118272721A (en) | Super martensitic stainless steel coiled tubing and processing method thereof | |
CN116728002A (en) | Preparation method of low-carbon microalloy ultrahigh-strength continuous pipe | |
JPH0892648A (en) | Production of martensitic stainless steel oil well pipe | |
EP0115670B1 (en) | Method and apparatus for producing welded ferritic stainless steel tubing having improved weld ductility in the as-welded condition | |
JPH0133534B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: COROD INDUSTRIES INC. Free format text: MERGER;ASSIGNOR:COROD MANUFACTURING LTD., MERGING INTO WIDNEY WELL SERVICING INC.;REEL/FRAME:005753/0366 Effective date: 19870409 Owner name: HIGHLAND/COROD INC., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:COROD INDUSTRIES INC., A CO. OF CANADA;REEL/FRAME:005753/0371 Effective date: 19910523 |
|
AS | Assignment |
Owner name: BANK OF MONTREAL, ALBERTA Free format text: SECURITY INTEREST;ASSIGNOR:HIGHLAND/COROD INC.;REEL/FRAME:006887/0905 Effective date: 19931203 Owner name: HIGHLAND/COROD INC., ALBERTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COROD INDUSTRIES INC.;REEL/FRAME:006887/0903 Effective date: 19910523 Owner name: COROD INDUSTRIES INC., CANADA Free format text: MERGER;ASSIGNOR:COROD MANUFACTURING LTD.;REEL/FRAME:006887/0898 Effective date: 19870409 |