Downhole tool
AssigneeHamdeem Incorporated Limited
InventorRichard Keith Booth
Life of this patent
Estimating the term…
Abstract
A downhole tool for use within a well comprising a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface of the well. A first downhole fluid passage having an upper inlet and a lower outlet is provided in the body. At least one secondary fluid passage extending between the first downhole fluid passage and the annular gap is provided at the body. A sleeve member is provided at the body and adapted to move between a first position in which said at least one secondary fluid passage is closed and a second position in which said at least one secondary fluid passage is open. The sleeve member is maintained at one or both of the first and second positions upon rotation of the body within the well.
Claims52
A downhole tool for use within a well having a diameter and an interior surface, the tool comprising:
- a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface;
- a first downhole fluid passage provided in the body and having an upper inlet and a lower outlet;
- at least one secondary fluid passage provided at the body and extending between the first downhole fluid passage and the annular gap;
- a sleeve member provided at the body and adapted to move between a first position in which said at least one secondary fluid passage is closed and a second position in which said at least one secondary fluid passage is open;
- and
- retention means comprising a co-operating engagement means having a first key member receivable within a first recess, the retention means being adapted to maintain the sleeve member at at least one of the first and second positions upon rotation of the body within the well when the rate of rotation is above a predetermined value.
A downhole tool for use within a well having a diameter and an interior surface, the tool comprising:
- a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface;
- a first downhole fluid passage provided in the body and having an upper inlet and a lower outlet;
- at least one secondary fluid passage provided at the body and extending between the first downhole fluid passage and the annular gap;
- a sleeve member provided at the body and adapted to move between a first position in which said at least one secondary fluid passage is closed and a second position in which said at least one secondary fluid passage is open;
- and
- retention means which maintains the sleeve member at at least one of the first and second positions upon rotation of the body within the well, the retention means comprising a co-operating engagement means having a first key member and a second key member, wherein the first key member is receivable within a first recess to maintain the sleeve member in the first position, wherein the first key member is receivable within a second recess to maintain the sleeve member in the second position, and wherein the second key member is receivable within a third recess.
A downhole tool for use within a well having a diameter and an interior surface, the tool comprising:
- a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface;
- a first downhole fluid passage provided in the body and having an upper inlet and a lower outlet;
- at least one secondary fluid passage provided at the body and extending between the first downhole fluid passage and the annular gap;
- a sleeve member provided at the body and adapted to move between a first position in which said at least one secondary fluid passage is closed and a second position in which said at least one secondary fluid passage is open;
- retention means adapted such that rotation of the body causes the sleeve member to move to, and thereafter be maintained at, at least on of the first and second positions;
- and
- locking means for locking the sleeve member at one or both of the first and second positions, wherein the locking means comprises at least one locking piston actuatable by a fluid pumping pressure.
Dependencies are inferred from the claim text.