公开(公告)号：US20190017346A1

公开(公告)日：2019-01-17

申请号：US16065838

申请日：2016-12-26

申请人： Kureha Corporation

发明人： FUMINORI KOBAYASHI ,  MASAYUKI OKURA ,  TAKEO TAKAHASHI

IPC分类号： E21B33/12 ,  E21B33/128 ,  E21B33/134 ,  E21B43/26 ,  B21C23/00

摘要： A stock shape for a downhole tool component includes a magnesium alloy including a phase containing 70 to 95 wt. % of magnesium in which 0 wt. % or more and less than 0.3 wt. % of a rare earth metal, a metal material other than the magnesium and the rare earth metal, and 0.1 to 20 wt. % of a degradation accelerator are distributed, and the stock shape has an average particle size of the metal material of 1 to 300 μm, tensile strength of 200 to 500 MPa, and a degradation rate in a 2% potassium chloride aqueous solution at 93° C. of not less than 20 mg/cm2 and not greater than 20000 mg/cm2 per day. Accordingly, a downhole tool having high strength and being readily degradable is established.

公开(公告)号：US20160108165A1

公开(公告)日：2016-04-21

申请号：US14979844

申请日：2015-12-28

申请人： Kureha Corporation

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA

IPC分类号： C08G18/32 ,  E21B33/12

摘要： 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.

摘要翻译： 用于井下工具的橡胶构件，优选密封构件，球形密封剂，球座或保护构件，其中在150℃水中相对于50％应变压缩浸渍24小时后的50％应变压缩应力的降低率 浸渍前的应力不小于5％，优选不低于50％; 包括所述橡胶构件的井下工具; 以及使用井下工具回收碳氢化合物资源的方法。

公开(公告)号：US20160298407A1

公开(公告)日：2016-10-13

申请号：US15029410

申请日：2014-10-20

申请人： KUREHA CORPORATION

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA

IPC分类号： E21B29/02 ,  E21B33/128 ,  C09K8/42 ,  E21B43/26

CPC分类号： E21B33/1208 ,  C09K8/426 ,  E21B23/06 ,  E21B29/02 ,  E21B33/128 ,  E21B33/1291 ,  E21B43/26

摘要： A plug for well drilling comprising a mandrel and members attached on an outer circumferential surface orthogonal to an axial direction of the mandrel, wherein at least one of the members or the mandrel is formed from a degradable material; a ring-shaped ratchet structure formed from a plurality of interlocking parts that allows movement of the member in one direction along the axial direction of the mandrel and restricts movement in the opposite direction is provided on an inner circumferential surface of the member and the outer circumferential surface of the mandrel; preferably further comprising a pushing jig including a ratchet structure and a ring-shaped plate adjacent to the axial direction leading side of the pushing jig. Additionally, a well drilling method using the plug for well drilling, comprising degrading a part or all of the plug after blocking a borehole.

摘要翻译： 一种用于钻井的塞子，其包括心轴和附接在与所述心轴的轴向正交的外周表面上的构件，其中所述构件或所述心轴中的至少一个由可降解材料形成; 由多个互锁部形成的环状棘轮结构体，其能够沿着该心轴的轴向在一个方向上移动并限制相反方向的移动，并且在该构件的内周面上设置有外周 心轴表面; 优选地还包括推动夹具，其包括棘轮结构和邻近推动夹具的轴向前导侧的环形板。 另外，使用用于钻井的塞子的钻井方法，包括在堵塞钻孔之后降低塞子的一部分或全部。

公开(公告)号：US20160102244A1

公开(公告)日：2016-04-14

申请号：US14894635

申请日：2014-05-30

申请人： KUREHA CORPORATION

发明人： TAKEO TAKAHASHI ,  HIKARU SAIJO ,  MIZUKI SAITO

IPC分类号： C09K8/80 ,  D01F8/14 ,  C08G63/16 ,  D01F6/62 ,  C08G63/08 ,  C08L67/04

CPC分类号： C09K8/80 ,  C08G63/08 ,  C08G63/16 ,  C08L67/04 ,  C08L2205/025 ,  C09K8/035 ,  C09K2208/08 ,  D01D5/34 ,  D01F6/62 ,  D01F6/625 ,  D01F6/92 ,  D01F8/14 ,  D10B2331/04 ,  D10B2331/041 ,  D10B2401/00 ,  D10B2505/00 ,  E21B43/26

摘要： A fiber formed from a resin that degrades in treatment fluid for hydrocarbon resource recovery, an oligomer component content of a resin forming an outer surface of the fiber being not greater than 1 mass %, and a birefringence of the fiber being not less than 0.02; a method for manufacturing a degradable fiber for use in well treatment fluid, the oligomer component content of a resin that forms an outer surface of an undrawn yarn obtained in a spinning step being not greater than 1 mass %, and a birefringence of a drawn yarn before heat treatment in a drawing step being not less than 0.02; and a well treatment method using the well treatment fluid containing the degradable fiber for use in well treatment fluid and a proppant.

摘要翻译： 由用于烃资源回收的处理流体中降解的树脂形成的纤维，形成纤维外表面的树脂的低聚物成分含量不大于1质量％，纤维的双折射率不小于0.02; 制造用于处理流体的可降解纤维的方法，在纺丝步骤中形成未拉伸丝的外表面的树脂的低聚物组分含量不大于1质量％，拉伸丝的双折射 在拉伸步骤中的热处理之前不小于0.02; 以及使用含有可降解纤维的井处理流体用于井处理流体和支撑剂的井处理方法。

公开(公告)号：US20170015900A1

公开(公告)日：2017-01-19

申请号：US15123823

申请日：2015-03-04

申请人： KUREHA CORPORATION

发明人： MASAYUKI OKURA ,  TAKEO TAKAHASHI ,  TAKUMA KOBAYASHI

IPC分类号： C09K8/72 ,  C09K8/62 ,  E21B33/12 ,  C09K8/78

CPC分类号： E21B33/12 ,  C09K8/72 ,  F16J15/102

摘要： A well treatment method characterized by disintegrating an elastic material by contacting a seal member for downhole tools comprising the elastic material with a well treatment fluid (acids such as hydrochloric acid, formic acid, acetic acid, and hydrofluoric acid, alkalis, hot water, steam, organic solvents, and the like).

摘要翻译： 一种井下处理方法，其特征在于，通过使包括弹性材料的井下工具的密封构件与井处理流体（酸如盐酸，甲酸，乙酸和氢氟酸，碱，热水，蒸汽 ，有机溶剂等）。

公开(公告)号：US20160237774A1

公开(公告)日：2016-08-18

申请号：US15028227

申请日：2014-10-20

申请人： KUREHA CORPORATION

发明人： MASAYUKI OKURA ,  TAKEO TAKAHASHI

IPC分类号： E21B33/12 ,  E21B33/128 ,  E21B33/129

CPC分类号： E21B33/12 ,  E21B33/128 ,  E21B33/1291 ,  E21B43/26

摘要： A plug for well drilling comprising a mandrel and members attached on an outer circumferential surface orthogonal to an axial direction of the mandrel. In such a plug for well drilling, at least the mandrel or one of the members is formed from a degradable material and a curvature radius of a bent portion thereof is from 0.5 to 50 mm. Additionally, a well drilling method using the plug for well drilling, the method comprising degrading a part or all of the plug for well drilling after blocking a borehole.

摘要翻译： 一种用于钻井的塞子，其包括心轴和附接在与心轴的轴向正交的外圆周表面上的构件。 在这种用于钻井的塞子中，至少芯棒或其中一个构件由可降解材料形成，其弯曲部分的曲率半径为0.5至50mm。 另外，使用用于钻井的塞子的钻井方法，所述方法包括在堵塞钻孔之后降低所述塞子的一部分或全部用于钻井。

公开(公告)号：US20170016298A1

公开(公告)日：2017-01-19

申请号：US15123857

申请日：2015-03-04

申请人： Kureha Corporation

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA ,  TAKUMA KOBAYASHI

IPC分类号： E21B29/02 ,  C08K5/00 ,  C09K8/42 ,  E21B33/12

CPC分类号： E21B29/02 ,  C08K3/012 ,  C08K5/0016 ,  C08K5/0033 ,  C08K5/092 ,  C08K5/1575 ,  C08K5/42 ,  C08L75/04 ,  C09K8/426 ,  E21B33/1208 ,  E21B33/134 ,  E21B43/26 ,  C08L21/00

摘要： A degradable rubber member for a downhole tool formed from a rubber material containing from 0.1 to 20 parts by mass of a degradation accelerator relative to 100 parts by mass of a degradable rubber (optionally containing other rubber materials and/or reinforcing materials), of which, preferably, the decrease rate of the mass or the 50% strain compressive stress after immersion for 24 hours in 150° C. water is not less than 5%, and/or the mass loss rate after immersion for 72 hours in 150° C. water is from 5 to 100%, and further, as desired, the tensile fracture strain at 66° C. is not less than 50%, the 70% strain compressive stress is not less than 10 MPa, and the compressive fracture strain is not less than 50%; a degradable seal member or a protecting member for downhole tools comprising such a rubber member; and a downhole tool such as a plug for well drilling, and a method for well drilling.

摘要翻译： 一种用于井下工具的可降解橡胶构件，其由相对于100质量份的可降解橡胶（任选地包含其它橡胶材料和/或增强材料）的0.1质量份到20质量份的降解促进剂的橡胶材料形成，其中， 优选在150℃水中浸渍24小时后的质量或50％应变压缩应力的降低率为5％以上，和/或150℃下浸渍72小时后的质量损失率 水为5〜100％，进一步根据需要，66℃下的拉伸断裂应变为50％以上，70％应变压缩应力为10MPa以上，压缩断裂应变为 不低于50％; 用于井下工具的可降解密封构件或保护构件，包括这种橡胶构件; 以及诸如用于钻井的塞子的井下工具和用于钻井的方法。

公开(公告)号：US20160290083A1

公开(公告)日：2016-10-06

申请号：US15037841

申请日：2014-12-22

申请人： KUREHA CORPORATION

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA ,  HIKARU SAIJO ,  TAKAHIRO WATANABE ,  HIROYUKI SATO

IPC分类号： E21B29/02 ,  C08L67/04 ,  E21B33/13 ,  E21B33/134 ,  E21B43/26

CPC分类号： E21B29/02 ,  C08G18/4283 ,  C08G18/7642 ,  C08G2230/00 ,  C08L67/04 ,  E21B33/12 ,  E21B33/13 ,  E21B33/134 ,  E21B43/26 ,  C08L75/04 ,  C08L67/025

摘要： A downhole tool or a member thereof, preferably a ball sealer, a ball seat, a frac plug or a bridge plug, comprising a degradable resin composition containing a degradable resin and a toughness enhancing agent, in which the degradable resin composition has an izod impact strength (unnotched) of 1,000 J/m or more, a tensile elongation of 3% or more, and a tensile strength of 30 MPa or more; a degradable resin composition for a downhole tool (member) containing 60 to 99.9 mass % of the degradable resin and 0.1 to 40 mass % of the toughness enhancing agent; and a method for recovering a hydrocarbon resource using the downhole tool (member).

摘要翻译： 一种井下工具或其构件，优选球形密封剂，球座，压裂塞或桥塞，包括含有可降解树脂和韧性增强剂的可降解树脂组合物，其中可降解树脂组合物具有izod冲击 强度（无缺口）为1,000J / m以上，拉伸伸长率为3％以上，拉伸强度为30MPa以上。 含有60〜99.9质量％的可降解树脂和0.1〜40质量％的韧性增强剂的井下工具（构件）的降解性树脂组合物， 以及使用井下工具（构件）回收碳氢化合物资源的方法。

公开(公告)号：US20160108695A1

公开(公告)日：2016-04-21

申请号：US14892045

申请日：2014-05-29

申请人： Kureha Corporation

发明人： MASAYUKI OKURA ,  TAKEO TAKAHASHI

IPC分类号： E21B33/12 ,  E21B33/129

CPC分类号： E21B33/12 ,  E21B33/1208 ,  E21B33/1291

摘要： 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.

摘要翻译： 一种用于钻井工艺的塞子，包括：（a）由可降解材料形成的心轴; （b）一对环，其放置在与所述心轴的轴向正交的外周表面上，所述环中的至少一个由可降解材料形成; 和（c）至少一个直径可膨胀的圆形橡胶构件，其设置在与心轴的轴向正交的外周面上的一对环之间的位置处; 在150℃的温度下浸渍72小时后的可降解材料的质量损失百分比优选为5〜100％ 以及钻井方法，其包括使用用于钻井过程的塞子堵塞井眼的步骤，其中用于钻井过程的塞子的部分或全部在堵塞之后劣化。

公开(公告)号：US20160298415A1

公开(公告)日：2016-10-13

申请号：US15037506

申请日：2014-12-24

申请人： KUREHA CORPORATION

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA

IPC分类号： E21B33/12 ,  C09K8/42 ,  C09J167/00 ,  E21B43/26 ,  E21B33/128

CPC分类号： E21B33/1208 ,  C09J167/00 ,  C09K8/426 ,  E21B33/128 ,  E21B43/26

摘要： A degradable seal member for downhole tools, the member being a diameter-expandable annular seal member, the diameter-expandable annular seal member comprising: two or more annular members distributed along an axial direction, the annular members being formed from a degradable polymer material having hardness in a range from A60 to D80; a plug for well drilling; and a method for well drilling using the degradable seal member for downhole tools.

摘要翻译： 一种用于井下工具的可降解密封构件，所述构件是直径可扩张的环形密封构件，所述直径可扩张的环形密封构件包括：两个或更多个沿轴向方向分布的环形构件，所述环形构件由可降解的聚合物材料形成， 硬度范围为A60〜D80; 用于钻井的塞子; 以及使用井下工具的可降解密封构件进行钻井的方法。