 ... per square inch. This has been the situation for many years, as gas pumps have constantly been in operation in that district since 1869. New wells are occasionally drilled on this exhausted belt, and it invariably happens that when the oil sand is...  Bulletin1910Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | Ontario. Legislative Assembly - 1892 - 552 σελίδες
...gas pumps that a vacuum gauge at any of the well heads registers a downward pressure of 12 to 18 lb. per square inch. This has been the situation for many...district since 1869. New wells are occasionally drilled in this exhausted belt, and it invariably happens that when the oil sand is pierced a current of air... | |
 | Ontario. Department of Mines, Ontario. Bureau of Mines - 1892 - 302 σελίδες
...gas pumps that a vacuum gauge at any of the well heads registers a downward pressure of 12 to 13 Ib. per square inch. This has been the situation for many...constantly been in operation in that district since 18S9. New wells are occasionally drilled in this exhausted belt, and it invariably happens that when... | |
 | 1917 - 992 σελίδες
...pumping had been continued until there were negative pressures of — 12 pounds in the oil sand, says: New wells are occasionally drilled on this exhausted belt, and it Invariably happens that when this oil sund is pierced a current of air commences to whistle down the hole, nor can any oil be obtained... | |
 | 1918 - 1234 σελίδες
...pumping had been continued until there were negative pressures of — 12 pounds in the oil sand, says : New wells are occasionally drilled on this exhausted belt, and it invariably happens that when this oil sand Is pierced a current of air commences to whistle down the hole, nor can any oil be obtained... | |
 | Anthony Blum - 1922 - 384 σελίδες
...pumping had been continued until there were negative pressures of 12 pounds in the oil sand, says: "New wells are occasionally drilled on this exhausted belt and it invariably happens that when this oil is pierced a current of air commenced to whistle down the hole, nor can any oil be obtained... | |
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