公开(公告)号：US20130043874A1

公开(公告)日：2013-02-21

申请号：US13266080

申请日：2009-10-29

申请人： Brian Clark ,  Reza Taherian ,  Darek W. Logan ,  Garry Holmen ,  Anthony R. Dopf ,  Aaron Logan ,  Robert Ulter

发明人： Brian Clark ,  Reza Taherian ,  Darek W. Logan ,  Garry Holmen ,  Anthony R. Dopf ,  Aaron Logan ,  Robert Ulter

IPC分类号： G01V3/06

CPC分类号： G01V3/24 ,  E21B10/00 ,  E21B17/028 ,  E21B45/00 ,  E21B47/122

摘要： A drill bit assembly for measuring reservoir formation properties comprises a bit head and a pin body, and an electrically insulated gap joint between two conductive parts of the drill bit assembly. The bit head has a cutting end and an opposite connecting end with an engagement section. The pin body comprises a connecting end with an engagement section. The pin connecting end is connected to the bit head connecting end such that the engagement sections overlap. The electrically insulating gap joint can fill a gap between the bit head and pin body engagement sections such that the bit head and pin body are mechanically connected together at the connecting ends but electrically separated. Alternatively or additionally, the pin body can have two pieces which are separated by an electrically insulating gap joint. An electrical conductor is electrically connected at a first end to the bit head and is communicable at a second end with an alternating current signal to transmit an alternating current into the bit head, thereby inducing an electric current into a reservoir formation adjacent the bit head. Electronic equipment includes measurement circuitry configured to determine the alternating current at the bit head, the alternating current being inversely proportional to a bit resistivity of the formation.

摘要翻译： 用于测量储层形成性能的钻头组件包括钻头头和销体，以及在钻头组件的两个导电部件之间的电绝缘间隙接头。 钻头头具有切割端和与接合部分相对的连接端。 销主体包括具有接合部分的连接端。 销连接端连接到钻头头连接端，使得接合部重叠。 电绝缘间隙接头可以填充钻头头和销体接合部分之间的间隙，使得钻头头和销体在连接端机械地连接在一起但是电分离。 或者或另外，销体可以具有由电绝缘间隙接头分开的两个部件。 电导体在第一端处电连接到钻头头部，并且可在第二端与交流电信号通信，以将交流电流传输到钻头头中，从而引入电流进入与钻头头相邻的储层结构。 电子设备包括测量电路，其被配置为确定位头处的交流电，交流电与地层的位电阻成反比。