Ball dropping assembly
作者： David Eugene Hirth , Gerald Dean Pedersen
DOI:
关键词:
摘要: A ball dropping assembly for an object such as a spherical into wellbore. The comprises seat retaining before it is released, lever, and shaft turning the lever. In one embodiment, attached to side bore in fluid communication with main cementing head. ball-retaining lever has at least finger which rotated between ball-retained position ball-released position. position, first disposed entrance from bore, thereby preventing entering of When ready release, direction causing second urge head, protrude bore. plug released will trip finger, rotate back towards Thus, also serves release indicator.
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