Petroleum Mining and Oil-Field Development; A Guide to the Exploration of Petroleum Lands, and a Study of the Engineering Problems Connected with the Winning of Petroleum, Including Statistical Data of Important Oil-Fields, Notes on the

Petroleum Mining and Oil-Field Development; A Guide to the Exploration of Petroleum Lands, and a Study of the Engineering Problems Connected with the Winning of Petroleum, Including Statistical Data of Important Oil-Fields, Notes on the

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...long, screwed with t;iper threads, and are left coupled up in pairs to make 42-feet lengths after the depth of the well exceeds about 70 feet. A sheet-iron cap with a hole sufficiently large to pass the collars of the rods is placed over the casing mouth when the tools have been lowered, and this is retained in position until the tools are again withdrawn to the surface, thus preventing any object from falling down tlv well. When the tools have been lowered to the bottom of the well the correct distance is made up with short rods to connect a temper screw suspended from the arm of the walking beam which overhangs the well. The weight of the tools suspended from the walking beam is generally counterbalanced by the attachment of weights to the opposite end of the beam, thus' causing the machine to run evenly and lessen the power required. When everything is ready for actual drilling the RUSSIAN BORING TOOLS. gearing is arranged for driving the walking beam and the belting slipped from the loose to the fast pulley. Whilst running slowly the temper screw is so adjusted that the freefall comes into play, each extreme downward movement causing the internal spindle of the freefall, to which the chisel, under-reamer, and sinker are connected, to attach itself to a projection on the body of the instrument on which it rests during the upward stroke, until a sharp movement transmitted to the rods by an operator at the surface causes dislodgment, and the bit, &c, to fall freely. The speed is then accelerated to between twenty and thirty strokes a minute, the temper screw being fed out as demanded, and the rods slightly rotated at each stroke to cause the bit to strike evenly over the whole surface of the hole. As quite a considerable amount of power is...show more

Product details

  • Paperback | 120 pages
  • 189 x 246 x 6mm | 227g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236522664
  • 9781236522665