EP 0981678 A1 20000301 - ARRANGEMENT IN A DRILLING APPARATUS
Title (en)
ARRANGEMENT IN A DRILLING APPARATUS
Title (de)
BOHRVORRICHTUNG
Title (fr)
STRUCTURE INTERNE D'APPAREIL DE FORAGE
Publication
Application
Priority
- FI 9800387 W 19980506
- FI 972010 A 19970513
Abstract (en)
[origin: WO9851900A1] Arrangement in a drilling apparatus, at the drilling end (I) of which there is a drilling device (1), that includes at least drilling means (2) and hammering means (5) to drill a hole by means of the drilling means (2) made functional by a transmission arrangement situated at the driving end (II) of the drilling apparatus, by using a feeding motion along the longitudinal axis (s) of the drilling device (1) and a rotational motion (w) around the longitudinal axis (s) as well as hydraulic fluid being led to the hammering means (5) to achieve a to-and-fro or a like hammering motion (t). The drilling device (1) has jointing means (3) for attachment of a drill rod (4) removably to the same, whereby in connection with the jointing means (3) there has been arranged coupling means (6), that include locking means (6d1, 6d2), that while detaching/attaching a component by means of pressurized medium, essentially self-powered close/open at least the flow openings transmitting hydraulic fluid. The coupling means (6) are arranged to operate by means of hydraulic fluid in a way , that the flow openings leading hydraulic fluid between the hammering means (5) and the hydraulic system of the drilling apparatus and being placed one after another in the longitudinal direction (s) get open essentially simultaneously, by placing a displacement space (x) for hydraulic fluid enabling functioning of the coupling means (6) to the drilling device (1)
IPC 1-7
IPC 8 full level
E21B 4/14 (2006.01); E21B 17/04 (2006.01); E21B 17/18 (2006.01); E21B 21/10 (2006.01)
CPC (source: EP US)
E21B 4/14 (2013.01 - EP); E21B 17/04 (2013.01 - EP US); E21B 17/18 (2013.01 - EP); E21B 21/10 (2013.01 - EP)
Designated contracting state (EPC)
AT DE FI FR GB IE SE
DOCDB simple family (publication)
WO 9851900 A1 19981119; AU 7337198 A 19981208; EP 0981678 A1 20000301; FI 972010 A0 19970513
DOCDB simple family (application)
FI 9800387 W 19980506; AU 7337198 A 19980506; EP 98920553 A 19980506; FI 972010 A 19970513