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. 1921 Excerpt: ... a bottom collar. The packer is lowered on the casing to the proper place in the hole, after which a weight is dropped, or the bailer is run, to break the disc. This releases the tention on the spring, forcing the slips up on the cone, causing them to engage the wall of the well, thus stopping the travel of the cone. ...
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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. 1921 Excerpt: ... a bottom collar. The packer is lowered on the casing to the proper place in the hole, after which a weight is dropped, or the bailer is run, to break the disc. This releases the tention on the spring, forcing the slips up on the cone, causing them to engage the wall of the well, thus stopping the travel of the cone. The weight of the casing is then supported by the slips, and in turn compresses the rubber cylinder, expanding it against the wall, thus sealing the space between the wall and the casing, and preventing the passage of water below the bottom of the casing. The Disc Cave Packer (Fig. 183) is used in lieu of an additional string of casing to shut off a caving formation or a cavern. Sufficient casing to cover the cave, of a size that will go down through the casing in the hole, is attached to the bottom of the cave packer. The bottom ring is screwed to the lower end of the smaller casing to serve as a shoe to protect it. The letting in tool is fitted to the upper connection of the packer and, by means of a string of tubing screwed to the letting in tool, the outfit is lowered to the point in the hole where the packer will be just above the cave and the casing will extend far enough to cover and shut it off. The letting in tool, which has a left hand thread, is then unscrewed and withdrawn and the packer is set by dropping a weight or lowering the tools to break the disc. The packer with rubber used in the hard formations will not answer for shutting off water in the unconsolidated sands and gravels of the Gulf Coast and the California fields; indeed, packers are little used in these fields and the casing is usually cemented. If, as sometimes happens, a cementing operation should fail to shut off the water or a lower water bearing formation should b...
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