EP 1882078 A1 20080130 - ROCK DRILLING ELEMENT, DRILL STRING AND METHOD FOR TRANSFERRING IMPACT ENERGY FROM A TOP HAMMER UNIT TO A DRILL BIT
Title (en)
ROCK DRILLING ELEMENT, DRILL STRING AND METHOD FOR TRANSFERRING IMPACT ENERGY FROM A TOP HAMMER UNIT TO A DRILL BIT
Title (de)
GESTEINSBOHRELEMENT, BOHRGESTÄNGE UND VERFAHREN ZUR ÜBERTRAGUNG VON AUFPRALLENERGIE VON EINER KOPFHAMMEREINHEIT AUF EINEN BOHRMEISSEL
Title (fr)
ELEMENT POUR CREUSER LA ROCHE, TRAIN DE TIGES ET PROCEDE DE TRANSFERT DE L'ENERGIE DE PERCUSSION D'UN MECANISME DE PERCUSSION VERS UN TREPAN
Publication
Application
Priority
- SE 2006000536 W 20060503
- SE 0501054 A 20050509
Abstract (en)
[origin: WO2006121386A1] The present invention relates to a rock drilling element for percussive drilling that is designed to reduce the stress usually developed on a thread joint (5) when the shock wave transmits from a slender portion to a thicker part. The rock drilling element has an elongated body comprising a first portion (10A) and a second portion (10B). The first portion (10A) has a female (16) or male thread intended to be connected to a drill rod (1) or a drill tube. The first portion (10A) has an outer diameter (D1) approximately equal to the major diameter of said thread (16). The second portion (10B) has a male (15) or female thread intended to be connected to a drill bit or a guide tube. The second portion (10B) forms a guide portion for radial guiding in a hole being drilled. The length of the first portion (10A) is at least 500 mm, such that the thread joint is moved away from an unfavorable reflection area. Furthermore, the present invention relates to a drill string and a method of transferring impact energy in a drill string.
IPC 8 full level
E21B 17/10 (2006.01)
CPC (source: EP KR SE US)
E21B 1/38 (2020.05 - EP KR SE US); E21B 17/00 (2013.01 - EP US); E21B 17/10 (2013.01 - KR SE)
Designated contracting state (EPC)
AT IE SE
DOCDB simple family (publication)
WO 2006121386 A1 20061116; CA 2606120 A1 20061116; EP 1882078 A1 20080130; KR 20080013901 A 20080213; RU 2007145427 A 20090620; SE 0501054 L 20061110; SE 531017 C2 20081118; US 2009065224 A1 20090312; ZA 200709487 B 20100127
DOCDB simple family (application)
SE 2006000536 W 20060503; CA 2606120 A 20060503; EP 06733391 A 20060503; KR 20077026052 A 20071109; RU 2007145427 A 20060503; SE 0501054 A 20050509; US 91979306 A 20060503; ZA 200709487 A 20071102