Downhole tool with bottom composite slip

A downhole tool comprising:

• a mandrel;
• a bottom slip disposed around the mandrel comprising:
• a circular body having a one-piece configuration characterized by at least partial material connectivity therearound, and further having a plurality of separated slip segments extending therefrom,
• wherein the bottom slip is made of a filament wound composite material further comprising a plurality of wound layers joined by respective interface layers, wherein an outer slip surface of an at least one of the plurality of slip segments is defined in cross-section by a plane P that intersects a longitudinal axis of the downhole tool at an angle a1 when the bottom slip is in an unset position, and wherein an end of each of the plurality of slip segments further comprises a facet;
• and
• a bottom cone having a plurality of end faces directly engaged with the respective facet of the bottom slip in the unset position, the engagement at a break angle b1 defined in cross-section by a break plane B that intersects the longitudinal axis,
• wherein the bottom cone has a sloped outer surface defined in cross-section by a plane P′ that intersects the longitudinal axis of the downhole tool at an angle a1′ that is oriented in an opposite direction to the angle a1, and
• wherein the sloped outer surface is not engaged with an inner slip surface in the unset position,
• wherein an at least two slip segments are separated by a respective lateral groove having a depth that extends from the outer slip surface to an inner slip surface,
• wherein the bottom cone comprises a raised fin configured to move through the respective lateral groove as the downhole tool moves from the unset to a set position, and wherein the raised fin is not in contact with any part of the bottom slip in the unset position.

A downhole tool comprising:

• a mandrel;
• a bearing plate disposed around the mandrel;
• a top slip disposed around the mandrel, and proximate to the bearing plate;
• a top cone disposed around the mandrel, and engaged with the top slip;
• a bottom slip disposed around the mandrel comprising:
• a circular body having a one-piece configuration characterized by at least partial material connectivity therearound, and the body further having a plurality of separated slip segments extending therefrom,
• wherein the bottom slip is made of a filament wound composite material further comprising a plurality of wound layers joined by respective interface layers, wherein an outer slip surface of an at least one of the plurality of slip segments is defined in cross-section by a plane P that intersects a longitudinal axis of the downhole tool at an angle a1 when the bottom slip is in an unset position, and wherein an at least one end of one of the plurality of slip segments further comprises a facet;
• a bottom cone having a plurality of end faces directly engaged with the respective facet of the bottom slip in the unset position, the engagement at a break angle b1 defined in cross-section by a break plane B that intersects the longitudinal axis in a range of 20 degrees to 60 degrees;
• a sealing element disposed between the top cone and the bottom cone;
• and
• a lower sleeve threadingly engaged with the mandrel,
• wherein the bottom cone has a sloped outer surface defined in cross-section by a plane P′ that intersects the longitudinal axis at an angle a1′ that is oriented opposite to the angle a1
• wherein the bottom cone comprises a raised fin configured to move through a respective lateral groove between two adjacent slip segments as the downhole tool moves from an unset to a set position, and wherein the raised fin is not in contact with any part of the bottom slip in the unset position.