Low penetration tong dies

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Slip, elevator and tong dies all rely on the biting action of the die's teeth into the pipe body for griping the pipe. The inner edge or inner periphery 56 of the tong body50 is normally of an arcuate configuration complementary to the outer periphery of the pipe to be supported thereby. This precludes an excessive stress on any one tooth, and distributes the load evenly over the entire gripping area of the die element 12, as well as assures that all of the teeth 16 will penetrate or bite into the pipe substantially the same depth. This tong lifts an irregular shaped piece and allows it to rotate to horizontal. The varied heights of the teeth determine a circle not shownas set forth in the preferred embodiment, in order to compensate for the curvature of the pipe being gripped by the tongs 10, as hereinbefore set forth. A still further object of this invention is to provide a novel die element for gripping tongs which is simple and eflicient in operation and economical and durable in construction. Referring to the drawings in detail, reference character 10 refers in general to any suitable grippingtong mechanism, such as a pipe tong, or the like, adapted for receiving a plurality of spaced dieelements

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A pair of longitudinally extending shoulder portions or flanges 18 and 20 are provided on the opposed outer edges of the body 14 for receiving apad or spacer member 22 and '24, respectively, thereon.

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Lifting Tongs

Lifting Tongs Bushman Equipment, Inc. It is to be noted that while six longitudinally extending teeth 16 are depicted herein, there is no intention of limiting the number of teeth to any specific number. Modified die elements Referring to FIGURE 5, a die element 34 is depicted comprising an elongated body portion 36 having a substantially trapezoidal cross-section configuration complementary to the dove tail recess not shown provided in the tongs 10 for receiving the die 34, as hereinbefore set forth. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells. In order to further tighten the threaded connection, or in the event that a greater pressure is required for any reason, the pressure of the tongs 10 against the pipe may be increased whereby the pads 22 and 24 will be compressed against the respective flanges 18 and 20, and the teeth 16 will be brought into contact with the outer periphery of the pipe. Tests show that pipe marred by pipe dies have penetration depths of up to 0.

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