24-10-2019 дата публикации
Номер: US20190323314A1
Принадлежит:
A downhole tool having a mandrel, a first slip, a second slip, a lower sleeve, and a tethered ball assembly. The mandrel includes a proximate end; a distal end; a bore having a ball seat associated therewith; and an outer surface. The first slip is disposed around the mandrel. The second slip is disposed around the mandrel. The lower sleeve is proximate to the first slip, and engaged with the outer surface at the distal end. The tethered ball assembly includes a ball; a drag; and at least one tether coupled between the ball and the drag. 1. A downhole tool comprising:a mandrel configured with a bore and a ball seat; a ball;', 'a drag;', 'at least one tether coupled between the ball and the drag; and', 'a retainer,, 'a tethered ball assembly comprisingwherein the retainer is coupled to the downhole tool in a manner whereby the ball is free to move off the ball seat only so far as the tether permits.2. The downhole tool of claim 1 , wherein a second tether is coupled between the retainer and the drag.3. The downhole tool of claim 2 , wherein the drag is spherical.4. The downhole tool of claim 3 , wherein the downhole tool is a frac plug.5. The downhole tool of claim 4 , wherein at least one component of the downhole tool is made of a reactive material.6. The downhole tool of claim 4 , wherein at least one component of the tethered ball assembly is made of a reactive material.7. A downhole tool comprising: a proximate end;', 'a distal end;', 'a bore having a ball seat associated therewith; and', 'an outer surface;, 'a mandrel comprisinga first slip disposed around the mandrel;a second slip disposed around the mandrel;a lower sleeve proximate to the first slip, and engaged with the outer surface at the distal end; a ball;', 'a drag; and', 'at least one tether coupled between the ball and the drag., 'a tethered ball assembly comprising8. The downhole tool of claim 7 , wherein the tethered ball assembly further comprises a retainer claim 7 , and wherein a second tether is ...
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