| CPC E21B 33/1208 (2013.01) [E21B 34/14 (2013.01); E21B 43/26 (2013.01); E21B 2200/06 (2020.05)] | 12 Claims |
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1. A sleeve-actuating tool for use in selectively opening one or more sleeves that are respectively covering a corresponding number of ports situated along piping within a wellbore, the tool adapted to be coupled to a distal end of continuous tubing and conveyed downhole in a wellbore via the continuous tubing, the tool comprising:
an elongate hollow mandrel, having a longitudinal bore and coupleable at an uphole end thereof to a distal end of continuous tubing and adapted to be in fluid communication with the continuous tubing;
an elongate piston member, having a longitudinal bore and itself situated in the longitudinal bore of the mandrel proximate an uphole end thereof and axially slidable within the longitudinal bore of the mandrel;
a plurality of longitudinally-extending, circumferentially-spaced resiliently flexible collets, each having a camming surface on an elongate interior surface thereof and each having a radially-outwardly extending protuberance on an outer periphery thereof which, when actuated, resiliently extends radially outwardly from an outer periphery of the mandrel;
an elongate camming member, having a longitudinal bore and one or more cams on an exterior periphery thereof adapted for physical contact with said camming surface on the elongate interior surface on each of the collets, the camming member coupled to the piston member and axially slidable within said longitudinal bore of the mandrel;
a spring member, biasing the elongate camming member and the piston member in an uphole direction along the longitudinal bore of the mandrel to a first axial position within the tool such that the elongate camming member and the cams thereon allow the protuberances on the collets to each thereby be positioned in a radially-retracted position within an outer periphery of said mandrel;
at least one radial port in said mandrel proximate an uphole end of thereof which is adapted to permit, when opened, flow of pressurized fluid from within the longitudinal bore of the mandrel to an exterior of the mandrel;
wherein the piston member is slidably moveable within the mandrel from:
(i) a first most-uphole position where the protuberances are caused to be radially retracted and the tool is in a run-in position; to
(ii) a second intermediate position more downhole than the first most-uphole position, namely wherein the piston member nevertheless still covers each of said at least one radial ports and wherein the protuberances are in a radially-outwardly extended position and the tool is thus configured to be in an actuated position; to
(iii) a third axially most-downhole position, wherein the piston member has uncovered or at least partly uncovered the at least one radial port in the mandrel so as to permit fluid under pressure to pass from within the longitudinal bore of the mandrel to an exterior of the mandrel;
and
wherein upon fluid under a first pressure being provided in said continuous tubing to an uphole end of the tool, the piston member of the tool is forced downhole and is adapted, when forced downhole, to: (a) force the elongate camming member to a second axial position more downhole than the first axial position thereby compressing or further compressing said spring member; and (b) cause the cams thereon to likewise move longitudinally downhole and engage the camming surface on each of the longitudinally-extending collets thereby causing the protuberances thereon to extend radially outwardly past the outer periphery of the mandrel.
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