Sleeve valves, shifting tools and methods for wellbore completion operations therewith
OwnerMark Andreychuk, Per Angmaninventors
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Abstract
A shift uphole-to-open sleeve assembly is provided for insertion along a tubular string for multi-stage, selectable wellbore treatment. The sleeve assemblies are very short in length, being too short for in-sleeve engagement, and instead have a downhole shoulder engageable for opening using dogs of a conventional shifting tool. Use of a common J-mechanism having four axial inappropriately places the sealing packer of a downhole tool above the sleeve ports. Multiple extra J-mechanism cycles are required to position the packer downhole thereof. Herein a modified downhole tool is disclosed including a biased repositioning sub to eliminate many of the extra tool cycles. In embodiments the short sleeve can replace casing collars.
Claims10
A bottom hole assembly (BHA) conveyed downhole on a conveyance string for actuating a selected sleeve assembly of one or more sleeve assemblies located along a completion string, comprising:
- a shifting tool comprising a BHA mandrel slidable within a BHA housing downhole thereof, the BHA mandrel having a resettable packer thereon, the BHA housing having slips and one or more sleeve engagement elements at an uphole end thereof, wherein the packer is released when spaced from the slips and set when engaged therewith;
- a drag block downhole of the shifting tool for impeding movement of the BHA housing relative to the completion string;
- a telescopic BHA repositioning sub connected to the shifting tool, the repositioning sub having a slack mandrel telescopically-coupled to a slack housing, wherein the telescopic BHA repositioning sub is telescopically extendible and collapsible between:
- an axially extended configuration in which the one or more sleeve engagement elements engage the selected sleeve assembly with the packer spaced from the slips;
- and
- an axially collapsed configuration in which the one or more sleeve engagement elements are shifted downhole of the selected sleeve assembly, towards the drag block, with the packer spaced from the slips;
- wherein, when the telescopic BHA repositioning sub is in the axially collapsed configuration, the BHA mandrel is movable with respect to the BHA housing to engage the packer with the slips to set the packer.
Dependencies are inferred from the claim text.