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公开(公告)号：US08122954B2
公开(公告)日：2012-02-28
申请号：US11858077
申请日：2007-09-19
IPC分类号： E21B47/09
CPC分类号： E21B47/04
摘要： A method for determining depth in a wellbore uses inertial navigation in conjunction with a database having one or more measured parameters correlated with depth. The measured parameter may be the lengths of stands forming a drill string, prior survey data relating to a naturally occurring feature such as formation lithology, or data relating to a human made feature such as collars in a casing string. The downhole processor may use accelerometer measurements to calculate a measured depth of a BHA and access the database to retrieve a predicted depth that corresponds with one or more sensor measurements (e.g., motion indicating the addition of a stand to a drill string). Thereafter, if the downhole processor determines that the predicted depth is in agreement with the calculated depth, the processor stores the predicted depth and/or associates the predicted depth with directional surveys taken along the wellbore.
摘要翻译： 用于确定井眼深度的方法使用惯性导航与具有与深度相关的一个或多个测量参数的数据库结合使用。 测量参数可以是形成钻柱的立场的长度，与诸如地层岩性的天然存在特征相关的先前测量数据，或与人造特征（例如套管柱中的套环）有关的数据。 井下处理器可以使用加速度计测量来计算BHA的测量深度并访问数据库以检索与一个或多个传感器测量值相对应的预测深度（例如，指示向钻柱添加支架的运动）。 此后，如果井下处理器确定预测深度与计算出的深度一致，则处理器存储预测深度和/或将预测深度与沿着井眼进行的定向勘测相关联。
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公开(公告)号：US20080105423A1
公开(公告)日：2008-05-08
申请号：US11858077
申请日：2007-09-19
申请人： Robert Estes , Jerry Cerkovnik , Gary Cresswell , William Befeld
发明人： Robert Estes , Jerry Cerkovnik , Gary Cresswell , William Befeld
IPC分类号： E21B47/04
CPC分类号： E21B47/04
摘要： A method for determining depth in a wellbore uses inertial navigation in conjunction with a database having one or more measured parameters correlated with depth. The measured parameter may be the lengths of stands forming a drill string, prior survey data relating to a naturally occurring feature such as formation lithology, or data relating to a human made feature such as collars in a casing string. The downhole processor may use accelerometer measurements to calculate a measured depth of a BHA and access the database to retrieve a predicted depth that corresponds with one or more sensor measurements (e.g., motion indicating the addition of a stand to a drill string). Thereafter, if the downhole processor determines that the predicted depth is in agreement with the calculated depth, the processor stores the predicted depth and/or associates the predicted depth with directional surveys taken along the wellbore.
摘要翻译： 用于确定井眼深度的方法使用惯性导航与具有与深度相关的一个或多个测量参数的数据库结合使用。 测量参数可以是形成钻柱的立场的长度，与诸如地层岩性的天然存在特征相关的先前测量数据，或与人造特征（例如套管柱中的套环）有关的数据。 井下处理器可以使用加速度计测量来计算BHA的测量深度并访问数据库以检索与一个或多个传感器测量值相对应的预测深度（例如，指示向钻柱添加支架的运动）。 此后，如果井下处理器确定预测深度与计算出的深度一致，则处理器存储预测深度和/或将预测深度与沿着井眼进行的定向勘测相关联。
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公开(公告)号：US5025873A
公开(公告)日：1991-06-25
申请号：US414703
申请日：1989-09-29
申请人： Jerry Cerkovnik
发明人： Jerry Cerkovnik
IPC分类号： E21B10/56 , E21B10/567
CPC分类号： E21B10/567 , E21B10/5673
摘要： The present invention comprises a rotary drill bit including a cutting structure comprising an array of cutting elements oriented and arranged to facilitate concentration of the load on bit on groups of cutting elements until the elements become dulled or worn, at which point fresh cutting elements are exposed to engage the formation and tube the concentrated bit loading. Preferably, the cutting elements are configured and/or supported to break away from the cutting structure when worn to a certain extent, thereby facilitating exposure of fresh cutting elements to engage the formation.
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公开(公告)号：US5873422A
公开(公告)日：1999-02-23
申请号：US197011
申请日：1994-02-15
CPC分类号： E21B10/43
摘要： An anti-whirl rotary drag bit including one or more cutters, wear knots or other support structures disposed on the flank of a bit profile in a normally cutter-devoid region of the profile adjacent the gage of the bit in the circumferential segment of the gage used as a bearing zone for the bit to ride against the side of the bore hole. Such flank cutters or other structures reduce wear of the bearing zone but, due to their placement, do not come into play except under certain drilling situations such as reaming or high rates of penetration wherein whirl tendencies resulting from cutting forces are not as pronounced.
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公开(公告)号：US5979576A
公开(公告)日：1999-11-09
申请号：US212610
申请日：1998-12-16
CPC分类号： E21B10/43
摘要： An anti-whirl rotary drag bit including one or more cutters, wear knots or other support structures disposed on the flank of a bit profile in a normally cutter-devoid region of the profile adjacent the gage of the bit in the circumferential segment of the gage used as a bearing zone for the bit to ride against the side of the bore hole. Such flank cutters or other structures reduce wear of the bearing zone but, due to their placement, do not come into play except under certain drilling situations such as reaming or high rates of penetration wherein whirl tendencies resulting from cutting forces are not as pronounced.
摘要翻译： 防旋转牵引钻头，包括一个或多个切割器，磨损结或其他支撑结构，其布置在位于轮廓的周边部分中的钻头的邻近表面的轮廓的正常切割缺失区域中的位轮廓的侧面上 用作钻头的轴承区域以抵靠钻孔的侧面。 这种侧面切割器或其他结构减少了轴承区域的磨损，但是由于它们的位置，除了在某些钻孔情况下，例如铰孔或高穿透率之外，不会发挥作用，其中由切割力引起的旋转倾向不是显着的。
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公开(公告)号：US4515227A
公开(公告)日：1985-05-07
申请号：US489197
申请日：1983-04-27
申请人： Jerry Cerkovnik
发明人： Jerry Cerkovnik
摘要： The flow of drilling fluid across the face of a rotating bit can be improved by disposition of jet nozzles in the middle of pads defined on the rotating bit rather than in or directly communicating with water courses in the bit. Drilling fluid is therefore ejected by the nozzle and flows in a plurality of directions across the face of the pad with a maximal velocity. Drilling fluid arriving in the proximity of the nozzle and provided from other sources in the bit is thus entrained within the drilling fluid which is ejected from the nozzle. This serves then to suction drilling fluid from these other sources. In particular, in a rotating bit having a pilot bit and main reamer bit, drilling fluid supplied to the pilot bit is directed toward a pilot bit junk slot in the immediate proximity of a nozzle disposed in the middle of a reamer lobe. Drilling fluid flowing down the pilot bit junk slot is entrained within drilling fluid ejected by the reamer nozzle. The combined fluid flows spread across the face of the reamer toward the main bit junk slots and gage broaches. Therefore, fluid is suctioned or drawn from and across the pilot bit by the reamer nozzles.
摘要翻译： 穿过旋转钻头表面的钻井液的流动可以通过在旋转钻头上限定的垫的中间设置喷射喷嘴而不是在钻头中的水道中或直接连通来改进。 因此，钻孔液体被喷嘴喷射并以最大速度沿着焊盘的多个方向流动。 因此，到达喷嘴附近并且由该钻头中的其它源提供的钻井流体被夹带在从喷嘴喷出的钻井液中。 这用于从这些其他来源吸入钻井液。 特别地，在具有导向钻头和主铰刀钻头的旋转钻头中，提供给导向钻头的钻井流体指向位于铰刀叶片中间的喷嘴附近的导向钻头废料槽。 在导向钻头槽中流下的钻井液被夹在钻孔喷嘴喷射的钻井液中。 组合的流体流动扩展到扩孔器的表面，朝向主钻头槽和量规拉刀。 因此，通过铰刀喷嘴吸引或者从导向钻头引导流体。
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