MASTER DRILLING SOUTH AFRICA (PTY) LTD. (Afrique du Sud)
Inventeur(s)
Kleuters, Nikolaus
Pretorius, Daniel Coenraad
Jordaan, Barend Jacobus
Germishuys, Louis
Goodwin, Nicolaas Bodenstein
Sheppard, Gareth Robert
Abrégé
A shaft enlargement arrangement for a boring system is provided, the shaft enlargement arrangement comprising a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head; and a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head to bore a leading hole as the boring system proceeds to bore downwardly. In an embodiment, the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements.
E21B 7/28 - Élargissement des trous forés, p. ex. par forage à contresens
E21B 27/00 - Récipients pour ramasser ou déposer des substances dans les trous de forage ou les puits, p. ex. cuillers pour ramasser de la boue ou du sableTrépans comportant des moyens pour ramasser des substances, p. ex. trépans à clapet
E21D 5/04 - Revêtement des puitsRevêtements à cet effet avec des briques, du béton, des pierres ou matériaux de construction analogues
E21B 10/32 - Trépans avec une partie pilote, c.-à-d. trépans comportant un organe coupant piloteTrépans pour élargir le trou de forage, p. ex. alésoirs à organes coupants expansibles
E21D 1/08 - Fonçage des puits avec progression simultanée du revêtement en descendant
E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans
E21D 1/06 - Fonçage des puits mécanique au moyen d'appareils à inciser pour forer les puits
E21B 4/18 - Ancrage ou avancement dans le trou de forage
E21B 15/00 - Supports pour la machine de forage, p. ex. tours de forage ou mâts de forage
E21B 17/10 - Protecteurs contre l'usureDispositifs de centrage
E21B 19/00 - Manipulation de tiges, tubages, tubes ou autre objets analogues à l'extérieur du trou de forage, p. ex. dans la tour de forageAppareils pour faire avancer les tiges ou les câbles
E21B 21/00 - Procédés ou appareils pour nettoyer les trous de forage par jet de fluide, p. ex. en utilisant l'air d'échappement du moteur
MASTER DRILLING SOUTH AFRICA (PTY) LTD (Afrique du Sud)
Inventeur(s)
Jordaan, Barend Jacobus
Abrégé
A slot reamer head arrangement comprising a substantially rectangular body from which three reaming heads extend in line is provided. In an embodiment, a central reaming head is fitted to a drill string extending from a drilling machine, in use, and thus rotates, relative to the body, as the drill string rotates. The two further reaming heads are positioned on either side of the central reaming head, to define end reaming heads, and are also arranged to rotate relative to the body. In an embodiment, the central reaming head is arranged to rotate in a first direction, and the two end reaming heads on either side of the central reaming head are arranged to rotate in an opposite direction. In this regard, the body includes a gear arrangement to interconnect the two end reaming ends with the central reaming head. In an embodiment, each reaming head comprises three rotating cutters fitted to a triangular base that is rotatably mounted to the body.
E21B 10/26 - Trépans avec une partie pilote, c.-à-d. trépans comportant un organe coupant piloteTrépans pour élargir le trou de forage, p. ex. alésoirs
E21B 7/28 - Élargissement des trous forés, p. ex. par forage à contresens
E21B 10/62 - Trépans caractérisés par des parties, p. ex. des éléments coupants, amovibles ou réglables
3.
INTEGRATED INSPECTION AND MAINTENANCE RAISE BORING METHOD AND AN ASSOCIATED DRILL STRING ARRANGEMENT
MASTER DRILLING SOUTH AFRICA (PTY) LTD. (Afrique du Sud)
Inventeur(s)
Jordaan, Barend, Jacobus
Abrégé
A raise boring method is disclosed including the steps of cutting a raise with a raise boring arrangement comprising a surface-mounted drilling unit from which a hollow drill string, comprising a plurality of hollow drill pipes fitted together, extends downwardly through a pre-drilled pilot hole, with a reamer head to cut the raise being fitted to the end of the drill string; stopping the cutting process; lowering a cable through the hollow drill string towards the bottom of the raise; fitting an inspection device at the bottom of the raise to the cable extending through the hollow drill string, the inspection device comprising a controller to receive data obtained by the inspection device; operating the inspection device so as to inspect the side wall below where the reamer head is cutting; communicating the data obtained by the inspection device to an inspection station; and determining whether maintenance is required on the side wall.