E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/57
E21B 19/24 (2006.01)
Patent
CA 1310629
Abstract of the Disclosure An arrangement for guiding drill rods in an extension rod drilling equipment, comprising an inter- mediate centralizer (4) mounted on a feeding beam (1) and having a drilling centre opening (8) and a rod exchanger (5) mounted at the side of the feeding beam and comprising a displacing means (19) provided with a retaining opening (24). The displacing means is dis- placeable from the side of the centralizer to a dis- placement position in which the retaining opening (24) is positioned concentrically with the centre opening (8). The centralizer is provided with a closing means (18) closing the periphery of the centre opening and with a guiding means (17) for displacing said closing means. The guiding means is positioned on the path of movement (B) of the displacing means so that the move- ment of the displacing means to the displacement posi- tion pushes the closing means away from the retaining position. (Figure 4)
535126
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Oy Tampella Ab
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