Cnpc USA Corporation

China National Petroleum Corporation

Beijing Huamei Inc.

Beijing Huamel, Inc.

Huailiang Liu

Peng Cheng

Lei Zhao

Yu Liu

Jiaxiang Ren

Min Mark Yuan

Jianpeng Yue

Matthew Patsy

Tim Dunne

The frac plug device is a wedge type or ramp type frac plug that can seal at a setting position in a large diameter portion of the borehole. The thickness, taper angle, and dimensions of components for passing through the narrowest portion of the borehole during deployment no longer limit the radial expansion. The frac plug device includes a core cone, a segmented cone, a slip device, a segmented cap member, and a core cap member. A simplified setting action sets the high expansion of the slip device by the core cone and the segmented cone. The segmented cone and the segmented cap member increase expansion of the slip device, and the segmented cap member and the core cap member lock the slip device around the core cone in the final expansion configuration at the maximum radial expansion for large diameter portions of the borehole.

Frac plug device for high expansion at the setting position

The patent application discloses a degradable thermoset composite. The composite comprises a reaction product of an epoxy resin mixture, a cross-linker, a catalyst. The epoxy resin mixture may comprise at least one aromatic epoxy resins having a glass transition temperature greater than or equal to 150° C. The reaction product may have a glass transition temperature greater than or equal to 110° C. as measured by DSC or DMA.

Bi-continuos epoxy microstructure for fabrication of degradable thermoset composite used in HTHP downhole conditions

A coating protects a dissolvable component of a downhole tool, so that the dissolvable component can be deployed to a desired downhole location, perform under high stress for fracturing operations, and be efficiently dissolved after the fracturing operations are completed. The present invention elevates known greases for this functionality usually performed by complex factory fabricated polymer and metal coatings. The coating includes an activation layer, a first grease layer, and a second grease layer. The first grease layer and the second grease layer have differential grease layer consistency ranges and thickness rages. The coating includes non-uniform layers of manually applied greases onsite to control degradation of the component substrate as effectively as factory coatings pre-fabricated on the components.

Compound grease coating for controlled dissolution of a dissolvable component of a downhole tool

Growing community of inventors

Beijing, China

Huailiang Liu