SE501356C2 - Threaded joint for drill string elements for striking drilling - Google Patents

Threaded joint for drill string elements for striking drilling

Info

Publication number
SE501356C2
SE501356C2 SE9302280A SE9302280A SE501356C2 SE 501356 C2 SE501356 C2 SE 501356C2 SE 9302280 A SE9302280 A SE 9302280A SE 9302280 A SE9302280 A SE 9302280A SE 501356 C2 SE501356 C2 SE 501356C2
Authority
SE
Sweden
Prior art keywords
drill string
threaded joint
string element
free end
sleeve
Prior art date
Application number
SE9302280A
Other languages
Swedish (sv)
Other versions
SE9302280L (en
SE9302280D0 (en
Inventor
Leif Nordfeldt
Karl Erik Kangas
Original Assignee
Uniroc Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uniroc Ab filed Critical Uniroc Ab
Priority to SE9302280A priority Critical patent/SE501356C2/en
Publication of SE9302280D0 publication Critical patent/SE9302280D0/en
Priority to CA002126027A priority patent/CA2126027C/en
Priority to AU66092/94A priority patent/AU671024B2/en
Publication of SE9302280L publication Critical patent/SE9302280L/en
Publication of SE501356C2 publication Critical patent/SE501356C2/en

Links

Classifications

    • 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
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Landscapes

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

Abstract

: Thread coupling for drill string elements for percussion drilling. The thread coupling comprises a first drill string element (1) provided with a sleeve formed part (2) having an internal thread (3) and a free end (4) for cooperation with a second drill string element (6) provided with a stop face (10) and a spigot (7) with an external thread (8). The free end (4) and the stop face (10) are hardened during manufacturing, preferably through case-hardening, to a depth of at least 2 mm. Furthermore, thesleeve formed part (2) and the spigot (7) are given such dimensions during manufacturing that a bottom play (A) of 1.1-2.0 mm, preferably 1.1-1.5 mm, is obtained when coupling newly made drill string elements.

Description

501 356 2 borrsträngselement 1 och ett andra borrsträngselement 6. Det första borrsträngselementet 1 är försett med en hylsformig del 2 som har en invändig gänga 3, en fri ände 4 och en bottenyta 5. Det andra borrsträngselementet 6 är försett med en tapp 7 som sträcker sig mellan en ytterände 9 och en anslagsyta 10. Tappen 7 är försedd med en utvändig gänga 8 för samverkan med den invändiga gängan 3 på den hylsformiga delen 2. Anslagsytan 10 på det andra borrsträngselementet 6 och den fria änden 4 på det första borrsträngselementet 1 ligger i ett plan som är vinkelrätt mot gängskarvens längsgående axel 11. 501 356 2 drill string element 1 and a second drill string element 6. The first drill string element 1 is provided with a sleeve-shaped part 2 which has an internal thread 3, a free end 4 and a bottom surface 5. The second drill string element 6 is provided with a pin 7 which extends between the outer end 9 and an abutment surface 10. The pin 7 is provided with an external thread 8 for co-operation with the inner thread 3 of the sleeve-shaped part 2. The abutment surface 10 of the second drill string element 6 and the free end 4 of the first drill string element 1 lie in a plane perpendicular to the longitudinal axis 11 of the threaded joint.

Anslagsytan 10 och den fria änden 4 är avsedda att samverka med varandra. vid tillverkningen härdas den fria änden 4 och anslagsytan 10, företrädesvis medelst sätthärdning, till ett djup av minst 2 mm från kontaktytan. Den hylsformiga delen 2 och tappen 7 ges vid tillverkningen sådana toleranser att avståndet mellan den fria änden 4 och bottenytan 5 på den hylsformiga delen 2 är 1,1-2,0 mm, företrädesvis 1,1-1,5 mm, större än avståndet mellan ytteränden 9 och anslagsytan 10 på det andra borrsträngselementet 6. Detta ger ettbottenspel A direkt efizer tillverkning av ovannämnd storlek. Genom att ge delarna ett härdningsdjup på minst 2 mm och genom att tillse att bottenspelet A vid skarvning av nytillverkade borrsträngselement är av ovannämnd storlek erhålles den fördelen att man med acceptabla tillverkningskostnader kan utnyttja anliggning mellan den fria änden 4 och anslagsytan 10 under betydligt längre tid än vad som varit möjligt med förut känd teknik. Detta medför en väsentligt större livslängd hos gängförbandet än vad som varit möjligt tidigare.The abutment surface 10 and the free end 4 are intended to cooperate with each other. during manufacture, the free end 4 and the abutment surface 10 are cured, preferably by means of set hardening, to a depth of at least 2 mm from the contact surface. The sleeve-shaped part 2 and the pin 7 are given in the manufacture such tolerances that the distance between the free end 4 and the bottom surface 5 of the sleeve-shaped part 2 is 1.1-2.0 mm, preferably 1.1-1.5 mm, greater than the distance between the outer end 9 and the abutment surface 10 of the second drill string element 6. This gives a bottom clearance A directly or the manufacture of the above-mentioned size. By giving the parts a hardening depth of at least 2 mm and by ensuring that the bottom play A when splicing newly manufactured drill string elements is of the above-mentioned size, the advantage is obtained that with acceptable manufacturing costs abutment between the free end 4 and the abutment surface 10 for much longer than what has been possible with prior art. This entails a significantly longer service life of the threaded connection than has been possible before.

Claims (3)

501 356 Patentkrav:501 356 Patent claims: 1. Gängskarv fór borrsträngselement för slående borrning innefattande ett första borrsträngselement (1) försett med en hylsformig del (2) som är försedd med en invändig gänga (3), en fii ände (4) och en bottenyta (5) och ett andra borrsträngselement (6) försett med en tapp (7) som är försedd med en utvändig gänga (8) och som sträcker sig mellan en ytterände (9) och en anslagsyta (10), k ä n n e t e c k n a d a v att sagda hylsformiga del (2) åtminstone invid sin fria ände (4) härdad med ett härdningsdjup av minst 2 mm samt att avståndet mellan sagda fria ände (4) och sagda bottenyta (5) på den hylsformiga delen (2) efter tillverkning är 1,1-2,0 mm större än avståndet mellan sagda ytterände (9) och sagda anslagsyta (10) på det andra borrsträngselementet (6) efier tillverkning.Threaded joint for striking drill string elements comprising a first drill string element (1) provided with a sleeve-shaped part (2) provided with an internal thread (3), a fi at the end (4) and a bottom surface (5) and a second drill string element (6) provided with a pin (7) which is provided with an external thread (8) and which extends between an outer end (9) and an abutment surface (10), characterized in that said sleeve-shaped part (2) at least adjacent to its free end (4) hardened with a hardening depth of at least 2 mm and that the distance between said free end (4) and said bottom surface (5) of the sleeve-shaped part (2) after manufacture is 1.1-2.0 mm greater than the distance between said outer end (9) and said abutment surface (10) of the second drill string element (6) or your manufacture. 2. Gängskarv enligt patentkravet 1, k ä n n e t e c k n a d a v att avståndet mellan sagda fi-ia ände (4) och sagda bottenyta (5) på den hylsformiga delen (2) efter tillverkning är 1,1-1,5 mm större än avståndet mellan sagda ytterände (9) och sagda anslagsyta ( 10) på det andra borrsträngselementet (6) efter tillverkning.Threaded joint according to claim 1, characterized in that the distance between said end (4) and said bottom surface (5) of the sleeve-shaped part (2) after manufacture is 1.1-1.5 mm larger than the distance between said outer end (9) and said abutment surface (10) on the second drill string element (6) after manufacture. 3. Gängskarv enligt patentkravet 1 eller 2, k ä n n e t e c k n a d a v att sagda härdning åstadkommits medelst sätthärdning.Threaded joint according to claim 1 or 2, characterized in that said curing is achieved by means of set curing.
SE9302280A 1993-07-02 1993-07-02 Threaded joint for drill string elements for striking drilling SE501356C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9302280A SE501356C2 (en) 1993-07-02 1993-07-02 Threaded joint for drill string elements for striking drilling
CA002126027A CA2126027C (en) 1993-07-02 1994-06-16 Thread coupling for drill string elements for percussion drilling
AU66092/94A AU671024B2 (en) 1993-07-02 1994-06-30 Thread coupling for drill string elements for percussion drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9302280A SE501356C2 (en) 1993-07-02 1993-07-02 Threaded joint for drill string elements for striking drilling

Publications (3)

Publication Number Publication Date
SE9302280D0 SE9302280D0 (en) 1993-07-02
SE9302280L SE9302280L (en) 1995-01-03
SE501356C2 true SE501356C2 (en) 1995-01-23

Family

ID=20390491

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9302280A SE501356C2 (en) 1993-07-02 1993-07-02 Threaded joint for drill string elements for striking drilling

Country Status (3)

Country Link
AU (1) AU671024B2 (en)
CA (1) CA2126027C (en)
SE (1) SE501356C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506695C2 (en) * 1994-11-23 1998-02-02 Uniroc Ab Threaded joint for striking drilling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE469603B (en) * 1988-07-08 1993-08-02 Sandvik Ab GAENGFOERBAND

Also Published As

Publication number Publication date
CA2126027A1 (en) 1995-01-03
CA2126027C (en) 2005-11-08
SE9302280L (en) 1995-01-03
AU671024B2 (en) 1996-08-08
SE9302280D0 (en) 1993-07-02
AU6609294A (en) 1995-01-12

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Legal Events

Date Code Title Description
NUG Patent has lapsed