| Patent application number | Description | Published |
|---|
| 20100307747 | ENGINEERED FIBERS FOR WELL TREATMENTS - Mixtures of fibers and solid particles are effective for curing fluid losses and lost circulation in a subterranean well. Stiff fibers are more effective than flexible ones; however, mixtures of stiff and flexible fibers have a synergistic effect. The quantity and particle-size distribution of the solids are optimized according to the stiffness, dimensions and concentrations of fibers. | 12-09-2010 |
| 20110005758 | METHOD AND COMPOSITION FOR CURING LOST CIRCULATION - The invention provides a system made of fibers and a material able to stick fibers in a network when activated, such activation can be temperature or pH change. The invention preferably is used in a well and as a method to cure lost circulation. | 01-13-2011 |
| 20110024113 | VISCO-ELASTIC SURFACTANT SPACERS - A spacer for use in an oil well cementing operation comprises an aqueous solution of a visco-elastic surfactant. A method of treating a well in a cementing operation, comprises pumping the spacer into a well ahead of a cement slurry for cementing the well. | 02-03-2011 |
| 20110048720 | METHODS FOR SERVICING SUBTERRANEAN WELLS - Methods for controlling lost circulation in subterranean wells, and in particular, fluid compositions and methods for operations during which the fluid compositions are pumped into a wellbore, enter voids in the subterranean-well formation through which wellbore fluids escape, and form a seal that limits further egress of wellbore fluid from the wellbore. The methods include preparing a carrier fluid containing compressed expandable foam that may be encapsulated. The carrier fluid is then placed into a lost-circulation zone, whereupon the foam expands to form a barrier that minimizes or blocks further ingress of carrier fluid. Lost-circulation control may be supplemented by introducing additional lost-circulation materials, pumping a cement slurry behind the foam-containing carrier fluid or both. | 03-03-2011 |
| 20110139454 | Method for Providing Thixotrophy to Fluids Downhole - A method of providing thixotropy to a fluid downhole comprising: adding an encapsulated thixotropic agent to a fluid at the surface; introducing the fluid into a borehole; and subjecting the fluid to a shearing action so as to release the thixotropic agent into the fluid. | 06-16-2011 |
| 20110183871 | Method and composition for curing lost circulation - The invention provides a system made of fibers and a material able to exhibit reverse solubility. The invention preferably is used in a well and as a method to cure lost circulation. | 07-28-2011 |
| 20110237465 | Release of Chemical Systems for Oilfield Applications by Stress Activation - The invention provides a system comprising a encapsulating material (B) and a component (A), wherein said component (A) is trapped within said encapsulating material (B) and said encapsulating material (B) being able to break and release said component (A) under pressure drop higher than 10 bars. | 09-29-2011 |
| 20110297375 | COMPOSTION FOR BOREHOLE TREATMENT - The invention is a composition, for use in treating oil wells, comprising fibres, hot melt adhesives and particulate solids. This composition has a wide range of applications including preventing or lessening lost circulation, wellbore strengthening or consolidation, controlling fluid loss, producing a “stress cage” effect, gravel packing, acting as an aid to cementing, and for proppant backflow control. | 12-08-2011 |
