Patent application number | Description | Published |
20090098399 | Coating Solution, and Gas Barrier Film, Gas Barrier Laminate and Gas Barrier Multilayer Film, Using the Coating Solution, and Their Manufacturing Methods - A coating solution comprising:
| 04-16-2009 |
20150096741 | MEMBER FOR HYDROCARBON RESOURCE COLLECTION DOWNHOLE TOOL - A downhole tool member for hydrocarbon resource recovery, comprising a shaped body of a polyglycolic acid resin having a weight average molecular weight of at least 70,000, having an effective thickness which is ½ or more of a critical thickness of surface decomposition, and exhibiting a thickness reduction rate in water which is constant with respect to time. As a result, it has become possible to more accurately design the strength and time up to the collapse of the downhole tool member which forms the whole or a part of a downhole tool for developing or repairing downholes for recovery of hydrocarbon resources, such as oil and gas. | 04-09-2015 |
20150144348 | BALL SEALER FOR HYDROCARBON RESOURCE COLLECTION AS WELL AS PRODUCTION METHOD THEREFOR AND DOWNHOLE TREATMENT METHOD USING SAME - A ball sealer for hydrocarbon resource recovery, comprising: a generally spherical entire structure including at least two layers of a spherical core and a surface resin layer covering the spherical core, of which at least the surface resin layer comprises a polyglycolic acid resin; and having a diameter of at least about 25 mm (1 inch). The ball sealer is produced through a process comprising the steps of: disposing a spherical core by a support pin at a substantially central position within a mold cavity, injecting a surface resin comprising a polyglycolic acid resin into the cavity surrounding the spherical core, causing the support pin to retreat up to a wall surface of mold cavity in synchronism with a completion of the injection of the surface resin, and then hardening the surface resin. As a result, it is possible to produce a large-diameter ball sealer suitable for use in the hydraulic fracturing process (hydraulic fracturing) widely used for recovery of hydrocarbon resources by using a polyglycolic acid resin which is a biodegradable resin having good mechanical strengths and a good size designability at least as a surface-forming resin, through relatively simple steps and with good dimensional accuracy. | 05-28-2015 |
20150252646 | SOLIDIFICATION- AND EXTRUSION-MOLDED ARTICLE OF POLYGLYCOLIC ACID AND METHOD FOR MANUFACTURING SAME - A solidification- and extrusion-molded article of polyglycolic acid that is formed of a resin material containing polyglycolic acid, the polyglycolic acid having a melt viscosity of 200 to 2,000 Pa·s when measured at a temperature of 270° C. under a shearing speed of 120 sec | 09-10-2015 |
20150290858 | SOLIDIFICATION- AND EXTRUSION-MOLDED ARTICLE OF POLYGLYCOLIC ACID AND METHOD FOR MANUFACTURING SAME - Provided are: a polyglycolic acid (PGA) solidification- and extrusion-molded article that is formed from a resin material containing PGA, the PGA having a weight average molecular weight of 100,000 to 300,000 and a melt viscosity (temperature: 270° C.; shearing speed: 120 sec | 10-15-2015 |
20150292292 | DOWNHOLE TOOL MEMBER FOR HYDROCARBON RESOURCE RECOVERY - A downhole tool member for hydrocarbon resource recovery, comprising a shaped body of a polyglycolic acid resin blended with an inorganic or organic short fiber reinforcement material, and having thickness reduction rate characteristics when held in water at 120° C., inclusive of: an initial thickness reduction rate (as an average for a holding period for 4 hours) which is at most 0.8 times that of a shaped body of the polyglycolic acid resin alone, and has a terminal thickness reduction rate (after the thickness decreases to 50% or less of an initial thickness) which is larger than 1.5 times the initial thickness reduction rate. As a result, it is possible to provide a downhole tool member, that is a temporary tool for formation or repair of downholes for recovery of hydrocarbon resources including oil and gas, or a part of the tool, which allows more accurate designing of collapse characteristics thereof. | 10-15-2015 |
20150354311 | POLY-L-LACTIC ACID SOLID-STATE EXTRUSION MOLDED ARTICLE, METHOD FOR PRODUCING THE SAME, AND USE APPLICATIONS OF THE SAME - A poly-L-lactic acid (PLLA) solid-state extrusion molded article having a weight average molecular weight of from 100,000 to 380,000 and a melt viscosity of from 20 to 2,000 Pa·s (at a temperature of 240° C. and a shear rate of 120 sec | 12-10-2015 |
20160108165 | RUBBER MEMBER FOR DOWNHOLE TOOLS, DOWNHOLE TOOL, AND METHOD FOR RECOVERING HYDROCARBON RESOURCE - A rubber member for downhole tools, preferably a seal member, ball sealer, ball seat, or protecting member, of which a decrease rate of 50% strain compressive stress after immersion for 24 hours in 150° C. water relative to 50% strain compressive stress before immersion is not less than 5%, and preferably not less than 50%; a downhole tool comprising the rubber member; and a method for recovering a hydrocarbon resource using the downhole tool. | 04-21-2016 |
20160108695 | A PLUG FOR WELL DRILLING PROCESS PROVIDED WITH MANDREL FORMED FROM DEGRADABLE MATERIAL - A plug for well drilling process comprising: (a) a mandrel formed from a degradable material; (b) a pair of rings placed on an outer peripheral surface existing in the orthogonal to an axial direction of the mandrel, at least one of the rings being formed from a degradable material; and (c) at least one diameter-expandable circular rubber member placed at a position between the pair of rings on the outer peripheral surface existing in the orthogonal to the axial direction of the mandrel; the percentage of mass loss in the degradable material after immersion for 72 hours in water at a temperature of 150° C. preferably being from 5 to 100%; and a well drilling method comprising the step of plugging well hole using the plug for well drilling process, wherein part or all of the plug for well drilling process degrades after the plugging. | 04-21-2016 |
20160108696 | MEMBER FOR HYDROCARBON RESOURCE COLLECTION DOWNHOLE TOOL - A downhole tool member for hydrocarbon resource recovery, comprising a shaped body of a polyglycolic acid resin having a weight average molecular weight of at least 70,000, having an effective thickness which is ½ or more of a critical thickness of surface decomposition, and exhibiting a thickness reduction rate in water which is constant with respect to time. As a result, it has become possible to more accurately design the strength and time up to the collapse of the downhole tool member which forms the whole or a part of a downhole tool for developing or repairing downholes for recovery of hydrocarbon resources, such as oil and gas. | 04-21-2016 |