Downhole running tool
AssigneePetroline Wellsystems Limited
InventorPaul David Metcalf
Life of this patent
Estimating the term…
Abstract
A downhole running tool (10) for use in positioning an item, such as a length of tubing (12) , in a bore comprises a body (11, 22) defining a fluid passage, an arrangement (20, 30) for creating a flow restriction, to create an increase in fluid pressure in the passage, and a fluid actuated retaining member (34) mounted on the body for engaging an item (12) to be carried into a bore on the tool (10). The retaining member (34) is in fluid communication with the body fluid passage above the flow restriction arrangement (20, 30) and is movable to a retracted position to release the item (12) by application of fluid pressure forces.
Claims16
A downhole running tool for use in positioning an item in a bore, the tool comprising:
- a body defining a fluid passage;
- means for creating a flow restriction, to create an increase in fluid pressure in the passage;
- and
- a fluid actuated retaining member mounted on the body for engaging said item to be carried into said bore on the tool, the retaining member being in fluid communication with the body fluid passage above the flow restriction means and being movable to a retracted position to release the item by application of fluid pressure forces thereto.
A downhole running tool for use in positioning expandable tubing in a bore, the tool comprising:
- a body for mounting on a string and defining a fluid passage therethrough including means for creating a flow restriction therein, to create an increase in fluid pressure in the passage;
- a normally extended fluid actuated retaining member mounted on the body for engaging a section of said expandable tubing, the retaining member being in fluid communication with the body passage and being movable to a retracted position to release the expandable tubing by application of fluid pressure forces thereto;
- and
- an expander cone mounted on the body, for expanding the released expandable tubing.
A method of positioning an item in a bore, the method comprising the steps:
- (a) providing a downhole running tool comprising a body defining a fluid passage therethrough and having a fluid actuated retaining member mounted thereon and in fluid communication with the passage, the retaining member being movable between extended and retracted positions by application of fluid pressure forces thereto;
- (b) mounting said item to be carried into a bore on the tool and engaging the item with the extended retaining member;
- (c) running the tool and item into a bore;
- (d) creating a flow restriction in the passage;
- (e) increasing the fluid pressure in the fluid passage to move the retaining member to the retracted position and release the item from the tool;
- and
- (f) retrieving the tool from the bore.
Dependencies are inferred from the claim text.