The behavior of enclosed-type connection of drill pipes during percussive drilling
| Parent link: | IOP Conference Series: Earth and Environmental Science Vol. 27 : Problems of Geology and Subsurface Development.— 2015.— [012057, 5 p.] |
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| Sumario: | Title screen Percussion drilling is the efficient method to drill small holes (>= 70 mm) in medium-hard and harder rocks. The existing types of drill strings for geological explorations are not intended for strain wave energy transfer. The description of the improved design of the drill string having enclosed-type nipple connections is given in this paper presents. This nipple connection is designed to be used in drilling small exploration wells with formation sampling. Experimental findings prove the effectiveness of the enclosed nipple connection in relation to the load distribution in operation. The paper presents research results of the connection behavior under quasistatic loading (compression-tension). Loop diagrams are constructed and analyzed in force-displacement coordinates. Research results are obtained for shear stresses occurred in the nipple connection. A mechanism of shear stress distribution is described for the wave strain propagation over the connecting element. It is shown that in the course of operation the drill pipe tightening reduces the shear stress three times. Режим доступа: по договору с организацией-держателем ресурса |
| Lenguaje: | inglés |
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2015
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| Colección: | Latest Technology of Oil and Gas Driling |
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| Acceso en línea: | http://dx.doi.org/10.1088/1755-1315/27/1/012057 http://earchive.tpu.ru/handle/11683/19958 |
| Formato: | Electrónico Capítulo de libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645146 |