Technical Paper Volume 313-326

Technical Paper Volume 313-326

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 edition. Excerpt: ...15. Effective back pressures may be held either by regulating the fluid level or by controlling the gas pressure in the casing. 16. Constant back pressures can not be held on the oil sand unless the well pumps steadily and fast enough to keep the fluid down near the perforations in the tubing anchor. Minimum back pressures on wells can be assured either by predetermined fluid levels or by the regulation of gas pressure at the casing heads, but as soon as the fluid begins to head up in a well the pressure on the oil sand becomes greater than the minimum pressure. 17. Wells produce casing-head gas at a faster rate when they are pumping, and when the fluid is pumped down, than when they are shut down and there is a column of fluid in the hole. The fluid column that builds up when wells are shut down usually is effective in reducing materially the rate of flow of casing-head gas. 18. The wells tested did not emulsify their oil because of back pressure. They did emulsify their oil, however, because of worn cups and leaky valves or because pumping was continued after the wells had begun to pump off. 19. Holding back pressures should increase the flowing life of wells and when more widely adopted should encourage the invention of devices by which relatively small wells will flow their production with their own gas pressure. Increasing the flowing life of a well is important not only with respect to increased recovery but to reduced operating expense. PRACTICAL APPLICATION OF BACK PRESSURE TO PRODUCING PROPERTIES. In this report data have been presented to show the effects of holding back pressures on two wells. These data for the most part corroborate theoretical conclusions, many of which have been advanced before by Bureau of Mines engineers....show more

Product details

  • Paperback
  • 189 x 246 x 12mm | 426g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236895754
  • 9781236895752