Wellbore packer with shearable anti-rotation locking member
This patent describes an inflatable packing tool for use in a subterranean wellbore when coupled to a wellbore conduit with a central bore for directing pressurized fluid in the wellbore. It comprises: a central tubular body for directing fluid in the wellbore, defining a central longitudinal axis; upper and lower stationary collar members secured to the central tubular body for coupling the central tubular body to the wellbore conduit; an annular inflatable packing element surrounding the central tubular body, including a flexible fluid-tight sleeve covered by overlapping and axially extending reinforcing ribs; a slidable sleeve assembly coupled to one end of the annular inflatable packing element; a locking means for fixing the position of the slidable sleeve assembly during a deflated running mode to prevent: axial movement of the slidable sleeve assembly relative to the central tubular body; rotational movement of the slidable sleeve assembly relative to the central tubular body; and twisting of the overlapping and axially extending reinforcing ribs out of axial alignment with the central longitudinal axis of the central tubular body; a valve means for inflating the annular inflatable packing element with pressurized fluid from the wellbore conduit during an inflation mode; and whereby the annular inflatable packing element is prevented from inadvertent inflation during the running mode as the inflatable packing tool is lowered ins aid wellbore, and the overlapping and axially extending reinforcing ribs are prevented from twisting out of axial alignment in response to rotational forces and damaging the annular inflatable packing element, and especially from damaging the flexible fluid-tight-sleeve of the annular inflatable packing element.
- Assignee:
- Baker Hughes Inc., Houston, TX (United States)
- Patent Number(s):
- US 5109926; A
- Application Number:
- PPN: US 7-612604
- OSTI ID:
- 5157689
- Resource Relation:
- Patent File Date: 29 Nov 1990
- Country of Publication:
- United States
- Language:
- English
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