US3032360A - Couplings for drill rods - Google Patents

Couplings for drill rods Download PDF

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US3032360A
US3032360A US813170A US81317059A US3032360A US 3032360 A US3032360 A US 3032360A US 813170 A US813170 A US 813170A US 81317059 A US81317059 A US 81317059A US 3032360 A US3032360 A US 3032360A
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rod
coupling
sections
drill
rods
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US813170A
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Robert T Woodings
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F16B2200/509—Flanged connections clamped
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17393—One movable side
    • 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
    • Y10T403/5793—Distinct end coupler including member wedging or camming means

Definitions

  • This invention relates to couplings for drill rods and, particularly, a coupling adapted for making up long lengths of drill rod during the drilling operation.
  • the rod is made up of a plurality of sections of rod which are customarily to 15 feet long.
  • the coupling of the invention is for the purpose of readily securing these sections together.
  • the bit or drilling tool is suspended from the rig, which is a suitable mechanism mounted above ground for raising, dropping and rotating the bit in cutting the required depth of hole to be drilled.
  • the drill rod connects the bit with a rig and, therefore, is continuously subjected to impact and torsional stresses throughout the drilling operation. Obviously, these stresses upon the drill rod and its couplings are increased as the depth of drilled hole is increased.
  • the drill rod sections are customarily hexagonal in cross-section, but occasionally a rod of circular crosssection is used.
  • the coupling customarily connecting adjacent ends of the rod sections must be readily attachable and must readily transmit both compressive and torsional stresses between the rod sections.
  • One object of the invention is to provide a sectional coupling which may be readily applied to the drill rod sections and prevent relative movement between adjacent ends of the rod sections connected thereby, or breaking of the rods at the coupling.
  • Another object of the invention is to provide a coupling of the character described which is readily applied and is not subject to distortion during use, so as to be readily removed after the drilling operation is completed.
  • FIG. 1 shows a longitudinal view, partly in cross-section, of the assembled coupling and adjacent ends of the hexagonal drill rod sections
  • FIG. 2 shows a vertical cross-section through the asmuld coupling taken on lines II-II of FIG. 1;
  • FIG. 3 shows an end elevation of the assembled rod and coupling taken on lines IIIIII of FIG. 1;
  • FIG. 4 shows a view similar to FIG. 1 illustrating a modified form of the invention.
  • FIG. 5 shows a section taken on lines V-V of FIG. 4.
  • the drill rod sections 1 are hexagonal in crosssection and have the adjacent abutting ends 2 thereof shaped to provide an adequate bearing surface for one rod upon the other.
  • the center of each drill rod end is recessed, as at 3.
  • an enlarged portion or collar 4 Inwardly from each end of the drill rod section is an enlarged portion or collar 4, which is preferably circular in cross-section but may be of other desired shapes.
  • Each drill rod section is preferably provided with an axially extending opening 5 for a well known purpose.
  • the coupling is comprised of two half sections 6 and a slidable clamping sleeve 7.
  • the sections 6 are each less than one half a circle, so that when assembled, about rods 1, provide a space 8 between their meeting edges.
  • Each section 6 of FIG. 1 has a semi-circular outer periphery 9 and an internal longitudinally extending cavity 10 receiving substantially one half the periphery of the hexagonal drill rod 1.
  • Intermediate the ends of each clamp section 6 are two spaced semi-circular recesses 11 preferably spaced equal distances about the mid-portion of the section.
  • Each recess 11 has a radius of not less than one-half the maximum cross-sectional dimension of the hexagonal drill rod 1 received in the cavity 10 and of the collar 4 on said rod.
  • each recess 11 is greater than the thickness of the rod collars 4 so as to freely receive same.
  • the spacing of the recesses 11 are such that the abutting ends of the drill rods 1 received in each section 6 has the face 4a of each rod collar 4, remote from the adjacent end of the drill rod, engaging the adjacent face of the clamp recess 11 so that the drill rod end absorbs and transmits all compression shock from the bit and the coupling receives only tension and torsional stresses.
  • the coupling sections 6 are retained in assembled clamping arrangement about the ends of the coupling rods therein by means of the sleeve 7.
  • the coupling sleeve 7 is a hollow cylindrical member of a length less than that of the coupling halves 6.
  • the outer periphery of the coupling sections are provided with a peripheral taper from end to end, and the inner periphery of sleeve 7 is tapered so as to lock upon the sections 6 when forced longitudinally thereof.
  • each round drill rod section 101 is provided with an abutting end portion 102, axially extending opening and end recess 103 as in FIG. 1.
  • Each rod 101 is also provided with an enlarged collar portion 104 received in recesses 111, as in FIG. 1. Additionally each drill rod 101 inwardly of collar 104 is pro vided with circumferentially spaced projecting portions 112 which are preferably spaced about the periphery of rod 101.
  • the coupling sections 106 are each provided with longitudinally extending cavities 111 to receive the rod 101 and recesses 111 to receive the collars 104 thereof in the same relation as described in regard to FIG. 1.
  • Each clamp section 106, within the cavity 110 thereof is provided with an additional recess 113, to receive one of the portions 112 of each rod 101 disposed therein. Since the rod portions 112 need to resist only torsional stresses, the recesses 113 may be made of suflicient size to freely receive portions 112 and, therefore, may be of larger dimension. The width dimension should be sufficiently close fitting to prevent relative rotary movement between clamp and rod.
  • the sleeve 107 is similar to sleeve 7 and retains the sections 106 in assembled relation.
  • the couplings of the invention are used to extend the length of the drill rod as the depth of drilled hole increases.
  • the fitted abutting ends of the drill rods, within the coupling, take up the major portion of the compressive shocks imposed upon the rod during the drilling operation.
  • the fit between the rod collars and recesses in the coupling prevent any substantial separation of the abutting rod ends therein and thus the coupling is subject to only tension when drill bit and rod are raised during the drilling operation.
  • the angular relation of the peripheral faces of the drill rod and clamping engagement of the coupling therewith prevent relative rotation between rod and coupling during the drilling operation. Since the diameter of the drill bit exceeds the diameter of the coupling, the couplings moving within the drilled hole are normally not damaged by frictional engagement with the walls of the drilled opening.
  • a coupling connection between adjacent ends of two sections of a drill rod suspending and rotating a drilling tool comprising a pair of hexagonally shaped drill rods each having shaped abutting end portions, an enlarged integral collar enclosing the periphery of each rod inwardly of each said abutting end portions, a pair of members extending continuously in longitudinal overlapping relation to both collars on said rod sections and having inner faces conforming to the periphery of the rod sections between and at opposite sides of said rod collars, each said member having a tapering semi-cylindrical outer face disposed wholly to one side of the longitudinal center of the rods and in spaced relation to the similar member on the opposite side of said longitudinal center of the rods, each said members having recessed portions on their inner faces receiving said rod collars, each said recesses having the width and diameter thereof in excess of the width and diameter of the rod collar received therein and spaced to embrace said collars to retain the rod ends between them in abutting engagement, and a hollow cylindrical slee
  • a coupling connection between adjacent ends of sections of a drill rod suspending and rotating a drilling tool comprising a pair of round drill rods each having shaped abutting end portions, an annular collar formed on each drill rod section in inwardly spaced relation to said shaped abutting end portion,- a plurality of circumferentially spaced longitudinally disposed projections from each drill rod section spaced inwardly of each said rod collars, a longitudinally extending hollow cylindrical sleeve enclosing said rod ends, collars and projections, said sleeve comprising two half sections embracing less than one-half the periphery of said rods, each sleeve section having an inner cavity conforming to the adjacent surfaces of the drill rods and recesses in said cavities receiving said rod collars and projections, and a tubular member slidably received over said sleeve sections clamping them to said drill rods.
  • a coupling connection between adjacent ends of two sections of a drill rod suspendingand rotating a drilling 5 tool comprising a pair of drill rod sections each having shaped abutting end portions, an enlarged integral collar enclosing the periphery of each rod section inwardly of each said abutting end portions, means on at least a portion of each said rod section adjacent said collars providing angularly-disposed peripheral surfaces, a pair of members extending continuously in longitudinal overlapping relation to both collars and said means of said rod sections and having inner faces substantially conforming to the periphery of the rod sections between and at opposite sides of said collar and to the angularly-disposed peripheral surfaces of said means, each said members having a tapering semi-cylindrical outer face disposed Wholly to one side of the longitudinal center of the rods and in spaced relation to the similar member on the opposite side of said longitudinal center of the rods, each said members having recessed portions on their inner faces receiving said rod collars, each said recessed portions having a width and diameter thereof in excess of the

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Description

y 1962 R. T. WOODINGS 3,032,360
COUPLING FOR DRILL RODS Filed May 14, 1959 INVENTOR. Robert TWoodings BY M. 61mm 'Q M ATTORNEY S United States Patent Office 3,032,360 Patented May 1, 1932 3,032,360 COUPLINGS FOR DRILL RODS Robert T. Woodings, 1214 Anderson Road, Pittsburgh, Pa. Filed May 14, 1959, Ser. No. 813,170 3 Claims. (Cl. 287-108) This invention relates to couplings for drill rods and, particularly, a coupling adapted for making up long lengths of drill rod during the drilling operation.
The drilling of holes through rock in preparing for blasting operations in a quarry frequently require a depth of hole which may be 50 or 60 feet deep. To provide the required length of drill rod, the rod is made up of a plurality of sections of rod which are customarily to 15 feet long. The coupling of the invention is for the purpose of readily securing these sections together.
During the drilling operation the bit or drilling tool is suspended from the rig, which is a suitable mechanism mounted above ground for raising, dropping and rotating the bit in cutting the required depth of hole to be drilled. The drill rod connects the bit with a rig and, therefore, is continuously subjected to impact and torsional stresses throughout the drilling operation. Obviously, these stresses upon the drill rod and its couplings are increased as the depth of drilled hole is increased.
The drill rod sections are customarily hexagonal in cross-section, but occasionally a rod of circular crosssection is used. The coupling customarily connecting adjacent ends of the rod sections must be readily attachable and must readily transmit both compressive and torsional stresses between the rod sections. One object of the invention is to provide a sectional coupling which may be readily applied to the drill rod sections and prevent relative movement between adjacent ends of the rod sections connected thereby, or breaking of the rods at the coupling.
Another object of the invention is to provide a coupling of the character described which is readily applied and is not subject to distortion during use, so as to be readily removed after the drilling operation is completed.
These and other objects of the invention will be made apparent from the following description and the drawing forming a part thereof wherein:
FIG. 1 shows a longitudinal view, partly in cross-section, of the assembled coupling and adjacent ends of the hexagonal drill rod sections;
FIG. 2 shows a vertical cross-section through the as sembled coupling taken on lines II-II of FIG. 1;
FIG. 3 shows an end elevation of the assembled rod and coupling taken on lines IIIIII of FIG. 1;
FIG. 4 shows a view similar to FIG. 1 illustrating a modified form of the invention; and
FIG. 5 shows a section taken on lines V-V of FIG. 4.
Referring now to the drawings and particularly FIGS. 1 to 3, the drill rod sections 1 are hexagonal in crosssection and have the adjacent abutting ends 2 thereof shaped to provide an adequate bearing surface for one rod upon the other. Preferably, the center of each drill rod end is recessed, as at 3. Inwardly from each end of the drill rod section is an enlarged portion or collar 4, which is preferably circular in cross-section but may be of other desired shapes. Each drill rod section is preferably provided with an axially extending opening 5 for a well known purpose.
The coupling is comprised of two half sections 6 and a slidable clamping sleeve 7. The sections 6 are each less than one half a circle, so that when assembled, about rods 1, provide a space 8 between their meeting edges. Each section 6 of FIG. 1, has a semi-circular outer periphery 9 and an internal longitudinally extending cavity 10 receiving substantially one half the periphery of the hexagonal drill rod 1. Intermediate the ends of each clamp section 6 are two spaced semi-circular recesses 11 preferably spaced equal distances about the mid-portion of the section. Each recess 11 has a radius of not less than one-half the maximum cross-sectional dimension of the hexagonal drill rod 1 received in the cavity 10 and of the collar 4 on said rod. The transverse width of each recess 11 is greater than the thickness of the rod collars 4 so as to freely receive same. Preferably the spacing of the recesses 11 are such that the abutting ends of the drill rods 1 received in each section 6 has the face 4a of each rod collar 4, remote from the adjacent end of the drill rod, engaging the adjacent face of the clamp recess 11 so that the drill rod end absorbs and transmits all compression shock from the bit and the coupling receives only tension and torsional stresses. The coupling sections 6 are retained in assembled clamping arrangement about the ends of the coupling rods therein by means of the sleeve 7. The coupling sleeve 7 is a hollow cylindrical member of a length less than that of the coupling halves 6. The outer periphery of the coupling sections are provided with a peripheral taper from end to end, and the inner periphery of sleeve 7 is tapered so as to lock upon the sections 6 when forced longitudinally thereof.
Referring now to FIGS. 4 and 5 of the drawings, wherein is shown a modification of the coupling of the invention for use with round instead of hexagonal drill rods, the coupling is again comprised of sections 106 and a sleeve 107. Each end of each round drill rod section 101 is provided with an abutting end portion 102, axially extending opening and end recess 103 as in FIG. 1. Each rod 101 is also provided with an enlarged collar portion 104 received in recesses 111, as in FIG. 1. Additionally each drill rod 101 inwardly of collar 104 is pro vided with circumferentially spaced projecting portions 112 which are preferably spaced about the periphery of rod 101. These portions 112 have a cross-sectional area sufiicient to resist shearing under maximum torsional stresses imposed upon the rod 101. The coupling sections 106 are each provided with longitudinally extending cavities 111 to receive the rod 101 and recesses 111 to receive the collars 104 thereof in the same relation as described in regard to FIG. 1. Each clamp section 106, within the cavity 110 thereof is provided with an additional recess 113, to receive one of the portions 112 of each rod 101 disposed therein. Since the rod portions 112 need to resist only torsional stresses, the recesses 113 may be made of suflicient size to freely receive portions 112 and, therefore, may be of larger dimension. The width dimension should be sufficiently close fitting to prevent relative rotary movement between clamp and rod. The sleeve 107 is similar to sleeve 7 and retains the sections 106 in assembled relation.
The couplings of the invention are used to extend the length of the drill rod as the depth of drilled hole increases. The fitted abutting ends of the drill rods, within the coupling, take up the major portion of the compressive shocks imposed upon the rod during the drilling operation. The fit between the rod collars and recesses in the coupling prevent any substantial separation of the abutting rod ends therein and thus the coupling is subject to only tension when drill bit and rod are raised during the drilling operation. The angular relation of the peripheral faces of the drill rod and clamping engagement of the coupling therewith prevent relative rotation between rod and coupling during the drilling operation. Since the diameter of the drill bit exceeds the diameter of the coupling, the couplings moving within the drilled hole are normally not damaged by frictional engagement with the walls of the drilled opening.
I claim:
1. A coupling connection between adjacent ends of two sections of a drill rod suspending and rotating a drilling tool, comprising a pair of hexagonally shaped drill rods each having shaped abutting end portions, an enlarged integral collar enclosing the periphery of each rod inwardly of each said abutting end portions, a pair of members extending continuously in longitudinal overlapping relation to both collars on said rod sections and having inner faces conforming to the periphery of the rod sections between and at opposite sides of said rod collars, each said member having a tapering semi-cylindrical outer face disposed wholly to one side of the longitudinal center of the rods and in spaced relation to the similar member on the opposite side of said longitudinal center of the rods, each said members having recessed portions on their inner faces receiving said rod collars, each said recesses having the width and diameter thereof in excess of the width and diameter of the rod collar received therein and spaced to embrace said collars to retain the rod ends between them in abutting engagement, and a hollow cylindrical sleeve having a tapering inner periphery slidably received over said members to retain the members in clamping engagement with only said rod end portions.
2. A coupling connection between adjacent ends of sections of a drill rod suspending and rotating a drilling tool, comprising a pair of round drill rods each having shaped abutting end portions, an annular collar formed on each drill rod section in inwardly spaced relation to said shaped abutting end portion,- a plurality of circumferentially spaced longitudinally disposed projections from each drill rod section spaced inwardly of each said rod collars, a longitudinally extending hollow cylindrical sleeve enclosing said rod ends, collars and projections, said sleeve comprising two half sections embracing less than one-half the periphery of said rods, each sleeve section having an inner cavity conforming to the adjacent surfaces of the drill rods and recesses in said cavities receiving said rod collars and projections, and a tubular member slidably received over said sleeve sections clamping them to said drill rods.
3. A coupling connection between adjacent ends of two sections of a drill rod suspendingand rotating a drilling 5 tool, comprising a pair of drill rod sections each having shaped abutting end portions, an enlarged integral collar enclosing the periphery of each rod section inwardly of each said abutting end portions, means on at least a portion of each said rod section adjacent said collars providing angularly-disposed peripheral surfaces, a pair of members extending continuously in longitudinal overlapping relation to both collars and said means of said rod sections and having inner faces substantially conforming to the periphery of the rod sections between and at opposite sides of said collar and to the angularly-disposed peripheral surfaces of said means, each said members having a tapering semi-cylindrical outer face disposed Wholly to one side of the longitudinal center of the rods and in spaced relation to the similar member on the opposite side of said longitudinal center of the rods, each said members having recessed portions on their inner faces receiving said rod collars, each said recessed portions having a width and diameter thereof in excess of the width and diameter of the rod collars received therein and spaced to embrace said collars to retain the rod ends between them in abutting engagement, and a hollow cylindrical sleeve having a tapering inner periphery slidably received over said members clamping them to said drill rods.
References Cited in the file of this patent UNITED STATES PATENTS 85,465 McKinney Dec. 29, 1868 519,454 Holland May 8, 1894 904,210 Minard Nov. 17, 1908 1,667,485 MacDonald Apr. 24, 1928 2,067,271 Johnson et al. Jan. 12, 1937 2,133,050 Simmons Oct. 11, 1938 2,249,162 Nielsen July 15, 1941
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239896A (en) * 1962-12-03 1966-03-15 Gen Motors Corp Die casting machine
US3413030A (en) * 1966-10-19 1968-11-26 Westinghouse Electric Corp Load release apparatus
US20070127983A1 (en) * 2003-11-18 2007-06-07 E.C.L. System for connecting two shafts in translation
US20160160573A1 (en) * 2014-12-05 2016-06-09 Tracto-Technik Gmbh & Co. Kg Drill string, connection system, earth drilling device and method to connect a drill string section

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US85465A (en) * 1868-12-29 William s
US519454A (en) * 1894-05-08 Robert j
US904210A (en) * 1908-02-28 1908-11-17 Wallace Minard Drill-rod coupling.
US1667485A (en) * 1927-08-25 1928-04-24 Leo O Smith Connecter
US2067271A (en) * 1934-05-09 1937-01-12 Drillers Supply & Mfg Company Coupling for sucker rods and the like
US2133050A (en) * 1936-06-17 1938-10-11 Richard P Simmons Sucker rod and combined coupling and torsion joint therefor
US2249162A (en) * 1939-05-26 1941-07-15 Adolph E Nielsen Threadless interlocking coupling

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US85465A (en) * 1868-12-29 William s
US519454A (en) * 1894-05-08 Robert j
US904210A (en) * 1908-02-28 1908-11-17 Wallace Minard Drill-rod coupling.
US1667485A (en) * 1927-08-25 1928-04-24 Leo O Smith Connecter
US2067271A (en) * 1934-05-09 1937-01-12 Drillers Supply & Mfg Company Coupling for sucker rods and the like
US2133050A (en) * 1936-06-17 1938-10-11 Richard P Simmons Sucker rod and combined coupling and torsion joint therefor
US2249162A (en) * 1939-05-26 1941-07-15 Adolph E Nielsen Threadless interlocking coupling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239896A (en) * 1962-12-03 1966-03-15 Gen Motors Corp Die casting machine
US3413030A (en) * 1966-10-19 1968-11-26 Westinghouse Electric Corp Load release apparatus
US20070127983A1 (en) * 2003-11-18 2007-06-07 E.C.L. System for connecting two shafts in translation
US7726900B2 (en) * 2003-11-18 2010-06-01 E.C.L. System for connecting two shafts in translation
US20160160573A1 (en) * 2014-12-05 2016-06-09 Tracto-Technik Gmbh & Co. Kg Drill string, connection system, earth drilling device and method to connect a drill string section
US9725962B2 (en) * 2014-12-05 2017-08-08 Tracto-Technik Gmbh & Co. Kg Drill string, connection system, earth drilling device and method to connect a drill string section

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