Patent application number | Description | Published |
20110100625 | METHOD FOR FORMING AN ISOLATING PLUG - The invention relates to methods for isolating near-wellbore zones and fractures and can be used for plugging fractures in the near-wellbore zone during the removal of the fracturing fluid, as well as for plugging different kinds of fractures and branches in the casing. The method for forming an isolating-plug includes the injection of a slurry containing dispersed fibers into a well and subsequent formation of a plug to isolate the relevant section of the well and to prevent the fluid penetration. The slurry is admixed with amphiphilic substances, and the fibers used are capable of adsorbing the amphiphilic substances on their surface. | 05-05-2011 |
20120267111 | Synthesis of Degradable Polymers Downhole for Oilfield Applications - A method is given for polymerizing monomers downhole to create well treatment polymers. The monomers each contain two polymerizable groups and a degradable group or groups which allow the polymer to degrade under downhole conditions, for example by hydrolysis. Polymerization downhole allows easier, more precise, placement of polymer. Polymer obtained from monomers pumped downhole may be used, for example, for fluid diversion plugs, isolation plugs, formation consolidation, flowback control, and fluid loss control. Synthesized polymer may form gels, films, solids or other structure in treated wellbores, fractures, and/or formations. After the desired effect is achieved, the deposited polymer degrades and the polymer degradation products dissolve, leaving the wellbore, fracture and/or formation clean, with no damage that might have decreased fluid flow. | 10-25-2012 |
20120329683 | DEGRADABLE FIBER SYSTEMS FOR WELL TREATMENTS AND THEIR USE - A method for treating a subterranean formation penetrated by a wellbore is carried out introducing a treatment fluid into the formation through the wellbore wherein the formation has a formation temperature of at least 70° C. A composition for such treatment is also provided. The composition and treatment fluid for the method is formed from water and an amount of fibers formed from high temperature polymers of at least one of a polyester, polyamide, polyurethane, polyurea polymers, and copolymers of these. Each of said high temperature polymers is characterized by the property of not substantially degrading in water at a pH of from 5 to 9 at temperatures below 80° C. A fiber degrading accelerant that facilitates degrading of the fibers at the formation temperature is also included in the treatment fluid. | 12-27-2012 |
20130048283 | Subterranean Reservoir Treatment Method - A method is given for heterogeneous proppant placement in fracturing by in situ aggregation of fine mesh proppant particulates or other materials such as fibers in a subterranean fracture. A polymer is injected into a subterranean formation and is subsequently subjected to a chemical reaction, for example hydrolysis, under downhole conditions, which leads to formation of either a cationic or an anionic polyelectrolyte. Alternatively, the polyelectrolyte is synthesized downhole by, for example, a Hofmann degradation or a Mannich reaction. The polyelectrolyte acts as a flocculant and provides aggregation of solid particulates such as sand, mica, silica flour, ceramics and the like, which leads to formation of proppant micropillars deep in the fracture. Methods of aggregation of fibers to enhance bridging, and other applications of controlled flocculation are also given. | 02-28-2013 |
20130327527 | Method to Enhance Fiber Bridging - A method of treating a geologic formation including injecting into a wellbore a high viscosity composition which comprises a base fluid wherein the base fluid has an initial viscosity of 100 cP or greater and which exhibits a decrease in viscosity upon exposure to a viscosity reducing agent, and fibers wherein the fibers exhibit flocking upon a decrease in the viscosity of the base fluid, and injecting into the wellbore a viscosity reducing agent wherein the viscosity reducing agent is injected into the wellbore with or separately from the high viscosity composition is provided. | 12-12-2013 |
20140318786 | COMPOSITIONS AND METHODS FOR SERVICING SUBTERRANEAN WELLS - Subterreanean formations penetrated by a wellbore may be stimulated by injecting a well-treatment fluid at a rate and pressure sufficient to create and propagate a fracture in the formation. The treatment fluid comprises a first slurry comprising at least one inorganic cement, water and at least one disruptive agent that may cause the formation of open channels in the fracture through which hydrocarbons in the formation may flow into the wellbore. The disruptive agent may comprise (but would not be limited to) water-soluble polymers that cause flocculation and agglomeration of cement solids, expansive agents, explosive agents, degradable materials, or a combination thereof. | 10-30-2014 |
20140374106 | MULTICOMPONENT DEGRADABLE MATERIALS AND USE - In general, the current disclosure relates to multicomponent fibers that have accelerated degradation in water in low temperature conditions, and their various industrial, medical and consumer product uses. Such materials are especially useful for uses in subterranean wells in oil and gas production. In some embodiments, the compositions of materials have accelerated degradation even at Ultra Low Temperature (“ULT”) (≦60° C.) in subterranean formations. | 12-25-2014 |
20150240612 | Acid Fracturing With Shapeable Materials - Elongated shapeable particles, for example bi-component fibers that are reshaped into tighter structures when heated, are injected into fractures generated during acid fracturing. Collections of such particles form as the temperature in the fracture increases, heterogeneously masking portions of the fracture faces and causing differential etching and increased fracture conductivity when formation-dissolving agents contact the fracture faces. Optionally, the elongated shapeable particles may decompose to release formation-dissolving agents. | 08-27-2015 |