公开(公告)号：US20170081942A1

公开(公告)日：2017-03-23

申请号：US14857122

申请日：2015-09-17

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Yucun Lou ,  Meng Qu

IPC: E21B33/14 ,  E21B47/00 ,  E21B49/00

Abstract: Procedures include designing parameters for cementation jobs based upon the wellbore geometries and loading conditions. The cementation parameters such as Young's modulus are selected such that longitudinal crack propagation is inhibited. Procedures also include determining critical loading conditions for an already-cemented casing annulus based upon the specified cement properties and wellbore conditions. The critical loading conditions are determined such that longitudinal crack propagation in the cement is inhibited. Techniques are used to improve the friction coefficients between the casing and cement to inhibit longitudinal crack propagation. The treatments can include forming surface patterns that enhance friction and/or making the casing surface oleophopic and/or hydrophilic.

公开(公告)号：US20160130931A1

公开(公告)日：2016-05-12

申请号：US14537114

申请日：2014-11-10

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Yucun Lou ,  Jahir Pabon

IPC: E21B47/00 ,  E21B7/00 ,  E21B17/16

CPC classification number: E21B47/0005 ,  E21B7/00 ,  E21B17/16

Abstract: Systems and methods for evaluating cement in the annulus of a wellbore are provided. In one embodiment, the cement may be evaluated using a casing arrival measurement sensor that measures casing arrival signals resulting from firing a signal from a cement bond logging acoustic source. Signals other than casing arrival signals may be attenuated using grooves between the transmitter and receiver in the drill collar.

Abstract translation: 提供了用于评估井筒环形中水泥的系统和方法。 在一个实施例中，可以使用壳体到达测量传感器评估水泥，其测量由来自水泥粘结测井声源的信号引发的套管到达信号。 除了套管到达信号之外的信号可以使用钻铤中的发射器和接收器之间的凹槽来衰减。