Method of temporarily closing perforations in the casing

• US 2,754,910 A
• Filed: 04/27/1955
• Issued: 07/17/1956
• Est. Priority Date: 04/27/1955
• Status: Expired due to Term

• Current Assignee: James V. Derrick, Lloyd H. Kaltenberger
• Original Assignee: James V. Derrick, Lloyd H. Kaltenberger
• Inventors: Derrick, James V., Kaltenberger, Lloyd H.
• Application Number:
  US03/504,212
• Time in Patent Office: 447 Days
• US Class Current: 166/284
• CPC Class Codes: C09K 8/60 Compositions for stimulating production by acting on the underground formation
• CPC Class Codes: E21B 33/138 Plastering the borehole wall; Injecting into the formation
• CPC Class Codes: E21B 43/25 Methods for stimulating production by vibrating earth formations E21B43/003
• CPC Class Codes: E21B 43/261 Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
• CPC Class Codes: Y10T 137/7838 Plural

Claims

1. A METHOD OF TEMPORARILY PLUGGING THE PERFORATIONS IN A CASING WHICH HAS BEEN SET IN A BORE HOLE, WHICH COMPRISES INJECTING A FLUID UNDER PRESSURE INTO A CASING TO CAUSE A FLOW OF FLUID THROUGH THOSE PERFORATIONS WHICH ARE ADJACENT PORTIONS OF A FORMATION IN WHICH THE BACK PRESSURE IS LESS THAN THE PRESSURE OF THE STREAM, ADDING PLUGGING ELEMENTS WHICH ARE LARGER THAN THE PERFORMATIONS IN THE CASING TO THE STREAM WHILE MAINTAINING THE PRESSURE ON THE STREAM WHEREBY CERTAIN OF THE PLUGS WILL BE CAUSED BY THE FLOW OF FLUID TO LODGE AGAINST SAID PERFORMATIONS THROUGH WHICH THE LIQUID HAS BEEN PASSING AND SEAL THE SAME.