公开(公告)号：US20180073347A1

公开(公告)日：2018-03-15

申请号：US15266444

申请日：2016-09-15

Applicant: Landmark Graphics Corporation

Inventor： . Aniket ,  Adolfo Gonzales ,  Robello Samuel ,  Robert D. Gilcrist

IPC: E21B47/00 ,  E21B17/00 ,  G06F17/50

CPC classification number: E21B47/0006 ,  E21B17/00 ,  G06F17/5018

Abstract: Damage to a casing string in a wellbore resulting from a wellbore operation can be predicted. For example, a stiff string model can be used to determine a contact point between the casing string and a well tool positionable within the casing string for performing the wellbore operation. The stiff string model can be used to determine a force of the well tool against the casing string at the contact point. The force can be used to determine a volume of damage to the casing string proximate to the contact point. A depth of a groove formed in the casing string proximate to the contact point can be determined based on the volume of damage.

公开(公告)号：US10352148B2

公开(公告)日：2019-07-16

申请号：US15300754

申请日：2014-08-12

Applicant: Landmark Graphics Corporation

Inventor： Robello Samuel ,  . Aniket

IPC: G01B21/00 ,  E21B47/00 ,  G01B21/08

Abstract: An illustrative method for estimating casing wear, including estimating, as a function of position along a casing string, a side force of a tubular string against the casing string, wherein said estimating accounts for a bending stiffness of the tubular string. The method further including determining, based at least in part on the side force, a casing string wear volume as a function of position along the casing string, and presenting the casing string wear volume to a user.

公开(公告)号：US20170022798A1

公开(公告)日：2017-01-26

申请号：US15300754

申请日：2014-08-12

Applicant: Landmark Graphics Corporation

Inventor： Robello Samuel ,  . Aniket

IPC: E21B47/00 ,  G01B21/08

CPC classification number: E21B47/0006 ,  G01B21/08

Abstract: An illustrative method for estimating casing wear, including estimating, as a function of position along a casing string, a side force of a tubular string against the casing string, wherein said estimating accounts for a bending stiffness of the tubular string. The method further including determining, based at least in part on the side force, a casing string wear volume as a function of position along the casing string, and presenting the casing string wear volume to a user.

Abstract translation: 一种用于估计套管磨损的说明性方法，包括根据套管柱的位置估计管柱相对于套管柱的侧向力，其中所述估计考虑了管柱的弯曲刚度。 该方法还包括至少部分地基于侧向力确定作为沿着套管柱的位置的函数的套管柱磨损量，以及将套管柱磨损体积呈现给使用者。

公开(公告)号：US20160251953A1

公开(公告)日：2016-09-01

申请号：US15028625

申请日：2013-10-28

Applicant: LANDMARK GRAPHICS CORPORATION

Inventor： Robello Samuel ,  . Aniket ,  Gustavo A. Urdaneta

IPC: E21B44/02 ,  E21B47/024 ,  E21B47/08 ,  E21B44/04 ,  E21B47/16 ,  E21B47/12 ,  E21B45/00 ,  E21B41/00 ,  E21B47/18

CPC classification number: E21B44/02 ,  E21B21/08 ,  E21B41/0092 ,  E21B44/04 ,  E21B45/00 ,  E21B47/024 ,  E21B47/08 ,  E21B47/12 ,  E21B47/16 ,  E21B47/18

Abstract: Drilling system and methods may employ a weight-on-bit optimization for an existing drilling mode and, upon transitioning to a different drilling mode, determine an initial weight-on-bit within a range derived from: a sinusoidal buckling ratio, a helical buckling ratio, and the weight-on-bit value for the prior drilling mode. The sinusoidal buckling ratio is the ratio of a minimum weight-on-bit to induce sinusoidal buckling in a sliding mode to a minimum weight-on-bit to induce sinusoidal buckling in a rotating mode, and the helical buckling ratio is the ratio of a minimum weight-on-bit to induce helical buckling in the sliding mode to a minimum weight-on-bit to induce helical buckling in the rotating mode. The ratios are a function of the length of the drill string and hence vary with the position of the drill bit along the borehole.

Abstract translation: 钻井系统和方法可以对现有的钻井模式采用重量优化，并且在转换到不同的钻井模式时，确定在一个范围内的初始加权重量，该范围源自：正弦屈曲比，螺旋屈曲 比率和先前钻孔模式的钻头重量值。 正弦曲线屈曲比是最小重量对比，在滑动模式下引起正弦曲线屈曲到最小重量对比，以在旋转模式中引起正弦曲折，并且螺旋压曲比是 最小重量对于在滑动模式中引起螺旋屈曲到最小重量，以在旋转模式中引起螺旋屈曲。 这些比率是钻柱的长度的函数，因此随着钻头沿钻孔的位置而变化。