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1. 发明公开

EP0391874A3 Flushing means for drilling tools 失效转让
标题翻译：用于钻孔工具的冲洗方法
公开(公告)号：EP0391874A3
公开(公告)日：1991-04-03
申请号：EP90850128.1
申请日：1990-04-03
申请人： UNIROC AKTIEBOLAG
发明人： Löf, Stig Uno
IPC分类号： E21B11/02
CPC分类号： E21B10/327 , E21B7/20 , E21B10/38 , E21B10/66 , E21B21/10 , E21B34/12
摘要： A flushing means for drilling tools comprises a guide member (10) carrying a drill bit (20) and being rotatably centered by the mouth of a casing tube (11) which is adapted to follow the drilling tool downhole during drilling. The drill bit (20) has a bit portion (22) that projects laterally beyond and is spaced axially in front of the casing tube (11) so as to drill a hole larger than the casing tube (11). There are external flushing grooves (70,71) on the guide member (10) adapted to lead the outflow of flushing medium and debris from the hole during drilling into the casing tube (11). At least one of these grooves (70) extends from front to rear of the guide member (10). One or more further grooves (71) are open towards said rear while ending blindly into the periphery of the guide member (10) spaced from its front. By retraction of the guide member (10) its front enters the casing tube (11). That closes the blind grooves (71) and an intensified flushing is thus possible via the remaining open grooves (70) that extends from front to rear of the guide member (10). The cutting front (40) of the bit portion (22) is flushed rotatively in counter flow to the rotational drilling direction (8) towards the full length groove (70).

2. 发明公开

EP0391873A3 Drilling tool 失效转让
标题翻译：钻井工具
公开(公告)号：EP0391873A3
公开(公告)日：1991-04-03
申请号：EP90850127.3
申请日：1990-04-03
申请人： UNIROC AKTIEBOLAG
发明人： Löf, Stig Uno
IPC分类号： E21B7/20
CPC分类号： E21B10/327 , E21B7/20 , E21B10/32 , E21B10/40 , E21B10/66
摘要： A drilling tool is followed by a casing tube (11) down the drilled hole. The mouth of the casing tube (11) centers rotatably a guide member (10) which receives rotation and impact energy via the interior of the casing tube (11). A drill bit (20) consists integrally of an axially protruding pilot portion (23), a sidewise projecting eccentric portion (22) and a rear shaft (21). The shaft (21) extends pivotally and axially movably into an eccentrically disposed bore (24) in the guide member (10). Axially spaced peripheral end grooves (30,32) extend in opposite direction from an axial cam groove (31) on the shaft (21) and are engaged by a follower (28) in the guide member (10) defining positively the axial and angular movability and positions thereof relative to the drill bit (20). In the forward end groove (32) the follower (28) maintains the drill bit (20) axially in drilling position adjacent to the guide member (10) with the eccentric portion (22) protruding to drill a hole larger than the casing tube (11). In an intermediate position 90° away from the drilling position, the follower (28) enters the cam groove (31) whereby the guide member (10) becomes axially movable the distance between the end grooves (30,32). In a rear axial position the guide member (10) by a continued 90° turn brings the follower (28) into the rear end groove (30) to axially define the retracted position of the drill bit (20), wherein it can be raised or lowered freely through the casing tube (11).

3. 发明公开

EP0391874A2 Flushing means for drilling tools 失效转让
标题翻译： BohrspülungseinrichtungfürBohrwerkzeuge。
公开(公告)号：EP0391874A2
公开(公告)日：1990-10-10
申请号：EP90850128.1
申请日：1990-04-03
申请人： UNIROC AKTIEBOLAG
发明人： Löf, Stig Uno
IPC分类号： E21B11/02
CPC分类号： E21B10/327 , E21B7/20 , E21B10/38 , E21B10/66 , E21B21/10 , E21B34/12
摘要： A flushing means for drilling tools comprises a guide member (10) carrying a drill bit (20) and being rotatably centered by the mouth of a casing tube (11) which is adapted to follow the drilling tool downhole during drilling. The drill bit (20) has a bit portion (22) that projects laterally beyond and is spaced axially in front of the casing tube (11) so as to drill a hole larger than the casing tube (11). There are external flushing grooves (70,71) on the guide member (10) adapted to lead the outflow of flushing medium and debris from the hole during drilling into the casing tube (11). At least one of these grooves (70) extends from front to rear of the guide member (10). One or more further grooves (71) are open towards said rear while ending blindly into the periphery of the guide member (10) spaced from its front. By retraction of the guide member (10) its front enters the casing tube (11). That closes the blind grooves (71) and an intensified flushing is thus possible via the remaining open grooves (70) that extends from front to rear of the guide member (10). The cutting front (40) of the bit portion (22) is flushed rotatively in counter flow to the rotational drilling direction (8) towards the full length groove (70).
摘要翻译：用于钻具的冲洗装置包括承载钻头（20）的引导构件（10），并且可旋转地以套管（11）的口为中心，该套管适于在钻孔期间沿着井下钻探工具。所述钻头（20）具有在所述套管（11）之前横向突出并且在所述套管（11）前方轴向间隔开的钻头部分（22），以钻出比所述套管（11）大的孔。在引导构件（10）上有外部冲洗槽（70,71），其适于在冲洗过程中引导冲洗介质的流出物和来自孔的碎屑进入套管（11）。这些凹槽（70）中的至少一个从引导构件（10）的前部延伸到后部。一个或多个另外的凹槽（71）朝着所述后部开口，同时盲目地进入与其前部间隔开的引导构件（10）的周边。通过引导构件（10）的缩回，其前部进入套管（11）。闭合盲槽（71）并且通过从引导构件（10）的前后延伸的剩余的开口槽（70）可以进行增强的冲洗。钻头部分（22）的切割前部（40）以相对于旋转钻孔方向（8）朝向全长凹槽（70）逆向旋转地冲洗。

4. 发明授权

EP0391874B1 Flushing means for drilling tools 失效转让
标题翻译：用于钻孔工具的冲洗方法
公开(公告)号：EP0391874B1
公开(公告)日：1993-08-04
申请号：EP90850128.1
申请日：1990-04-03
申请人： UNIROC AKTIEBOLAG
发明人： Löf, Stig Uno
IPC分类号： E21B11/02
CPC分类号： E21B10/327 , E21B7/20 , E21B10/38 , E21B10/66 , E21B21/10 , E21B34/12

5. 发明授权

EP0391873B1 Drilling tool 失效转让
标题翻译：钻井工具
公开(公告)号：EP0391873B1
公开(公告)日：1993-11-03
申请号：EP90850127.3
申请日：1990-04-03
申请人： UNIROC AKTIEBOLAG
发明人： Löf, Stig Uno
IPC分类号： E21B7/20
CPC分类号： E21B10/327 , E21B7/20 , E21B10/32 , E21B10/40 , E21B10/66

6. 发明公开

EP0391873A2 Drilling tool 失效转让
标题翻译： Bohrwerkzeug。
公开(公告)号：EP0391873A2
公开(公告)日：1990-10-10
申请号：EP90850127.3
申请日：1990-04-03
申请人： UNIROC AKTIEBOLAG
发明人： Löf, Stig Uno
IPC分类号： E21B7/20
CPC分类号： E21B10/327 , E21B7/20 , E21B10/32 , E21B10/40 , E21B10/66
摘要： A drilling tool is followed by a casing tube (11) down the drilled hole. The mouth of the casing tube (11) centers rotatably a guide member (10) which receives rotation and impact energy via the interior of the casing tube (11). A drill bit (20) consists integrally of an axially protruding pilot portion (23), a sidewise projecting eccentric portion (22) and a rear shaft (21). The shaft (21) extends pivotally and axially movably into an eccentrically disposed bore (24) in the guide member (10). Axially spaced peripheral end grooves (30,32) extend in opposite direction from an axial cam groove (31) on the shaft (21) and are engaged by a follower (28) in the guide member (10) defining positively the axial and angular movability and positions thereof relative to the drill bit (20). In the forward end groove (32) the follower (28) maintains the drill bit (20) axially in drilling position adjacent to the guide member (10) with the eccentric portion (22) protruding to drill a hole larger than the casing tube (11). In an intermediate position 90° away from the drilling position, the follower (28) enters the cam groove (31) whereby the guide member (10) becomes axially movable the distance between the end grooves (30,32). In a rear axial position the guide member (10) by a continued 90° turn brings the follower (28) into the rear end groove (30) to axially define the retracted position of the drill bit (20), wherein it can be raised or lowered freely through the casing tube (11).
摘要翻译：钻孔工具之后是钻孔的套管（11）。套管11的口部可转动地转动，该引导构件10通过套筒管11的内部容纳旋转和冲击能量。钻头（20）由轴向突出的先导部分（23），侧向突出偏心部分（22）和后轴（21）整体组成。轴（21）可枢转地和轴向地可移动地延伸到引导构件（10）中的偏心设置的孔（24）中。轴向间隔的外周端槽（30,32）与轴（21）上的轴向凸轮槽（31）相反的方向延伸并且与引导构件（10）中的从动件（28）接合，从而确定轴向和角度相对于钻头（20）的移动性和位置。在前端槽（32）中，从动件（28）将钻头（20）轴向保持在与引导构件（10）相邻的钻孔位置，偏心部分（22）突出以钻出比套管更大的孔 11）。在距离钻孔位置90°的中间位置处，从动件（28）进入凸轮槽（31），由此引导构件（10）能够在端部槽（30,32）之间的距离内轴向移动。在后轴向位置，引导构件（10）继续90°转动使从动件（28）进入后端凹槽（30）以轴向限定钻头（20）的缩回位置，其中可以升高或通过套管（11）自由下降。

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