COUPLING BETWEEN WELLBORE TOOLS HAVING CENTRAL TRANSMISSION SHAFTS
1 Assignment
0 Petitions
Accused Products
Abstract
Two well tools (100, 200) having centrally mounted drive shafts (160, 260) is provided with means 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 rotation lock it to a second outer sleeve (210) on the second tool. The drive shafts (160, 260) are coupled in a similar manner. The means for removing debris can comprise mechanical means to 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
20 Claims
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1-10. -10. (canceled)
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11. A coupling for wellbore applications between a first tool (100) comprising a first drive shaft (160) rotatably mounted in a first outer sleeve (110) and a second tool (200) comprising a second drive shaft (260) rotatably mounted in a second outer sleeve (210), characterized in
that the outer diameters of the first outer sleeve (110) are less than or equal to corresponding inner diameters of the second outer sleeve (210) and wherein one of the outer sleeves (110) comprises at least one first latching dog (121) fitting into at least one first groove (221) in the other outer sleeve (210), that the outer diameters of the first drive shaft (160) are less than or equal to corresponding inner diameters of the second drive shaft (260) and wherein one of the drive shafts (160) comprises at least one second latching dog (131) fitting into at least one second groove (231) in the other drive shaft (260), and that at least one of the tools comprises means (161, 162, 170, 271) for removing debris from the coupling.
Specification