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. 1913 edition. Excerpt: ...they are easily coupled or loosened, while the wear on pipe joints and collars is eliminated. For drilling through 8 or 10-in. casing, a 4-in. drillstem can be used while a 2-in. drill-stem is run in a smaller sized hole. The drill-collar (Figs. 122 and 123) into which the bit is screwed has a pipe connection ...
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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. 1913 edition. Excerpt: ...they are easily coupled or loosened, while the wear on pipe joints and collars is eliminated. For drilling through 8 or 10-in. casing, a 4-in. drillstem can be used while a 2-in. drill-stem is run in a smaller sized hole. The drill-collar (Figs. 122 and 123) into which the bit is screwed has a pipe connection at the upper end and a tool-joint connection at the lower end; these collars are often made of solid billets and Fig. 122. DRILL COLLAR Fig. 123. DRILL COLLAR are 36 in. in length with li-in. stock. They are sometimes both babbitted and riveted to the lower joint of the drill-stem, making a stiff connection that is not readily twisted off. On beginning to drill, the first joint of the drill-stem is plumbed and securely anchored in the derrick by braces until the hole is well started. When four or five joints have been added, the grip-ring attachment is laid aside and the patent drill-stem before described is substituted. The pumps are run fast enough to carry the drillings to the surface, at the same time keeping the hole clean. Where there is not enough clay present in the formation to 'mud up' the walls, this material can be hauled from a nearby well or bank, mixed and pumped into the hole until the caving ceases. The drill-stem is not forced, but a part of the weight is carried on a swivel to prevent a crooked hole and to 'mud up' the wall properly as well as to allow a free flow of water through the bit. Quite often the water does not return, by reason of the presence of a porous stratum, in which case enough clay is pumped into the well to get a complete circulation. This may take several days to accomplish, but it is necessary before drilling ahead can be resumed. When the bit becomes so dull that it does not readily cut the formation, ...
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Add this copy of Oil Production Methods to cart. $58.41, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2015 by Palala Press.
