Methods of Using a Fluid Disappearing Thermoset Epoxy in Wellbore and Related System and Methods of Forming Such ComponentsAcid Switchable Frac Screens for Sand Control
Publication Date: 2015-Oct-19
The IP.com Prior Art Database
Disclosed is an article comprising a selectively disintegrable polymeric composition containing a disintegrable polymer prepared from an epoxy polymer and a curing agent having cleavable bonds Also disclosed is a composite plug comprising a screen impregnated with the polymeric composition The composite plug can also have a laminate structure containing a screen and a barrier layer such as a disc made from the selectively disintegrable polymeric composition
Methods of Using a Fluid Disappearing Thermoset Epoxy in Wellbore and Related System and Methods of Forming Such Components
Acid Switchable Frac-Screens for Sand Control
 Downhole constructions including oil and natural gas wells, CO2 sequestration boreholes, etc. often utilize borehole components or tools that, due to their function, are only required to have limited service lives that are considerably less than the service life of the well. After a component or tool service function is complete, it must be removed or disposed of in order to recover the original size of the fluid pathway for uses such as hydrocarbon production, CO2 sequestration, etc. Disposal of components or tools can be accomplished by milling or drilling the component or by tripping the tool out of the borehole. Each of these is generally time consuming and expensive. The industry is always receptive to new systems, materials, and methods that remove a component or tool from a borehole without such milling and drilling operations.
 Disclosed herein is a selectively disintegrable polymeric composition containing a disintegrable polymer prepared from an epoxy resin and a curing agent having cleavable bonds.
 Further disclosed is an article comprising such polymeric compositions.
 Also disclosed is a composite plug comprising: a screen impregnated with the selectively disintegrable polymeric composition.
 Additionally disclosed is composite plug comprising a screen and a barrier layer containing a selectively disintegrable polymeric composition, wherein the barrier layer is disposed on the screen.
 A method to disintegrate a polymeric composition or an article comprises exposing the composition or the article to an organic acid, an acidified ethylene glycol, or a combination thereof.
 A method for converting a composite plug to a filtering device comprises exposing the composite plug to an organic acid, an acidified ethylene glycol, or a combination thereof
BRIEF DESCRIPTION OF THE DRAWINGS
 Referring now to the drawings wherein like elements are numbered alike in the several Figures:
 FIG. 1 shows an exemplary bead-screen;
 FIG. 2 shows a molded disc-shaped specimen of selectively dissolvable thermoset epoxy, wherein the coin is used to illustrate the transparency of the thermoset; and
 FIG. 3 is a schematic illustration of a sand control tool according to an embodiment of the disclosure.
 Disclosed herein are articles made from polymeric compositions that selectively and controllably disintegrate in response to contact with certain fluids or in response to changed conditions. Such articles are selectively degradable and have selectively tailorable disintegration rates and selectively tailorable material properties. Advantageously, the polymeric compositions contain epoxy polymers crosslinked or cured with a curing agent having at least one cleavable bo...