Coupling between wellbore tools having central transmission shafts
First Claim
1. A coupling for wellbore applications between a first tool comprising a first drive shaft rotatably mounted in a first outer sleeve and a second tool comprising a second drive shaft rotatably mounted in a second outer sleeve, wherein:
- outer diameters of the first outer sleeve are less than or equal to corresponding inner diameters of the second outer sleeve, and one of the first outer sleeve and the second outer sleeve comprises at least one first latching dog fitting into at least one first groove of the other of the first outer sleeve and the second outer sleeve;
outer diameters of the first drive shaft are less than or equal to corresponding inner diameters of the second drive shaft, and one of the first drive shaft and the second drive shaft comprises at least one second latching dog fitting into at least one second groove in the other of the first drive shaft and the second drive shaft;
the coupling has an axially preloaded lid that is adapted to substantially close an entrance to the second outer sleeve when the coupling is not in use.
1 Assignment
0 Petitions
Accused Products
Abstract
Two well tools (100, 200) having centrally mounted drive shafts (160, 260) are provided with a mechanism to remove debris from a coupling between them. Thereafter, the tools can be coupled by inserting a first outer sleeve (110) on the first tool into and rotationally lock it to a second outer sleeve (210) on the second tool. The drive shafts (160, 260) are coupled in a similar manner. The mechanism for removing debris can displace the debris and/or a flushing device (170) using well fluid to stir up debris. The coupling has space for debris that is not removed, e.g. in the form of a chamber 264. The female part of the coupling may comprise a spring loaded lid (271) to reduce pollution by debris when the coupling is not in use.
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Citations
12 Claims
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1. A coupling for wellbore applications between a first tool comprising a first drive shaft rotatably mounted in a first outer sleeve and a second tool comprising a second drive shaft rotatably mounted in a second outer sleeve, wherein:
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outer diameters of the first outer sleeve are less than or equal to corresponding inner diameters of the second outer sleeve, and one of the first outer sleeve and the second outer sleeve comprises at least one first latching dog fitting into at least one first groove of the other of the first outer sleeve and the second outer sleeve; outer diameters of the first drive shaft are less than or equal to corresponding inner diameters of the second drive shaft, and one of the first drive shaft and the second drive shaft comprises at least one second latching dog fitting into at least one second groove in the other of the first drive shaft and the second drive shaft; the coupling has an axially preloaded lid that is adapted to substantially close an entrance to the second outer sleeve when the coupling is not in use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification