Global Patent Index - EP 1259698 A1

EP 1259698 A1 2002-11-27 - SELF-PENETRATING DRILLING METHOD AND THRUST-GENERATING TOOL FOR IMPLEMENTING SAME

Title (en)

SELF-PENETRATING DRILLING METHOD AND THRUST-GENERATING TOOL FOR IMPLEMENTING SAME

Title (de)

VERFAHREN ZUM SELBSTANGETRIEBENEN BOHREN UND SCHUBERZEUGUNGSWERKZEUG ZUR DURCHFÜHRUNG DIESES VERFAHRENS

Title (fr)

PROCEDE DE FORAGE AUTO-PENETRANT ET OUTIL GENERATEUR DE POUSSEE PERMETTANT DE METTRE EN OEUVRE LE PROCEDE

Publication

EP 1259698 A1 (FR)

Application

EP 01907766 A

Priority

  • FR 0100401 W
  • FR 0002620 A

Abstract (en)

[origin: FR2805845A1] Self-penetrating drilling for cutting a shaft in rock comprises generating a force parallel to the axis (4) of the shaft using a drill bit driven in rotation about that axis. An Independent claim is also included for a tool for carrying out the above process. The multi-edge, multi-bladed drill bit has geometry designed to cut in a specific way to ensure the force along the axis is generated during rotation Preferred Tool: The tool has N blades (2a, 2b, 2c, 2d) numbered from 1 to N in the opposite direction to the rotation (5). Each blade is wound in a spiral around the axis of the tool and inclined relative to it; the part of the blade nearest the nose (1a) of the tool is also the nearest to the axis. Each blade has K edges (3a, 3b, 3c, 3d) with the first edge being the edge nearest to the axis and the nose of the tool. Each edge is described by two indices: the first index n, varying from 1 to N, gives the number of the blade carrying the edge, the second index k, varying from 1 to K, gives the position of the edge on the blade. Thus, the k'th edge of the n'th blade is called T(n,k). Each edge has an attack face (3b1) pressing on the rock. In order to generate a force in the forward direction, the geometries, positions and orientations of all or some of the edges are calculated using the following rules: - at the (q-1)th turn R(q-1) of the tool, the k'th edge of the last blade, T(N,k), cuts a groove in the rock downstream of that made by the (k+1)th edge of the first blade, T(1,k+1), on the q'th turn Rq of the tool - at the q'th turn Rq of the tool, the k'th edge of the n'th blade, T(n,k), cuts a groove in the rock downstream of that made by the k'th edge of the (n+1)th blade, T(n+1,k), on the q'th turn Rq of the tool. The normal to the attack face of the edge has a component pointing upstream along the axis of rotation

IPC 1-7 (main, further and additional classification)

E21B 10/42; E21B 10/44

IPC 8 full level (invention and additional information)

E21B 10/42 (2006.01); E21B 10/43 (2006.01); E21B 10/54 (2006.01); E21B 10/55 (2006.01); E21B 10/56 (2006.01); E21B 10/567 (2006.01)

CPC (invention and additional information)

E21B 10/43 (2013.01); E21B 10/55 (2013.01); E21B 10/5673 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

FR 2805845 A1 20010907; FR 2805845 B1 20020607; CA 2400449 A1 20010907; CA 2400449 C 20100706; EP 1259698 A1 20021127; NO 20024050 A 20020902; NO 20024050 D0 20020826; NO 328204 B1 20100111; US 2003141109 A1 20030731; US 7059431 B2 20060613; WO 0165052 A1 20010907

INPADOC legal status


2018-04-25 [INTG] ANNOUNCEMENT OF INTENTION TO GRANT

- Effective date: 20180326

2007-06-06 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040715

2004-09-01 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040715

2002-11-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020903

2002-11-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR