Halliburton Energy Services, Inc.

Christopher A Grace

David Joe Steele

Mark Christopher Glaser

Wesley Paul Dietz

Provided is a whipstock and well system. The whipstock, in one aspect, includes a coupling section having a first radius of curvature, the coupling section configured to engage with a mill bit when running in hole. The whipstock, in accordance with this aspect, further includes a casing breakthrough section having a second radius of curvature, and a controlled exit section having a third radius of curvature, wherein the second radius of curvature is less than the third radius of curvature.

Whipstock for use with a mill bit including varying material removal rates

Provided is a milling tool, a whipstock assembly, a well system, and a method. The milling tool, in at least one aspect, includes a plurality of blades extending radially outward from a mill body, each of the plurality of blades having a primary surface and first and second side surfaces coupled to opposing sides of the primary surface, adjacent blades of the plurality of blades separated by a spacing. The milling tool may further includes a lug slot extending partially into one of the plurality of blades from the first side surface exposed by the spacing, the lug slot configured to engage with a lug of a related tool to couple the milling tool with the related tool when rotating in a first direction and to disengage from the lug of the related tool to release the milling tool from the related tool when rotating in a second opposite direction.

Downhole tool including related lug slots and lugs for coupling a milling tool and whipstock assembly

A multi-bore junction assembly to be positioned in a multilateral well having a main wellbore and a lateral wellbore, wherein the multilateral well has an up-hole end and a downhole end, the multi-bore junction assembly comprises a deflector subassembly to be positioned at a junction between the main wellbore and the lateral wellbore. The deflector subassembly comprises a deflector sub that comprises, a first deflector bore at an up-hole end of the deflector sub, a second deflector bore at a downhole end of the deflector sub, wherein the second deflector bore is radially offset from the first deflector bore, a seal stinger to project from the second deflector bore, and a slot sub. Additionally, the multi-bore junction assembly comprises an outer sleeve positioned around the deflector subassembly, the outer sleeve having at least one pin, wherein the slot sub is to interact with the at least one pin.

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Carrollton, TX, United States of America

Christopher A Grace