Drilling process and apparatus
    1.
    发明授权
    Drilling process and apparatus 失效
    钻孔工艺和设备

    公开(公告)号:US5318136A

    公开(公告)日:1994-06-07

    申请号:US924057

    申请日:1992-09-04

    摘要: In a drilling process speed, bit thrust and penetration are monitored. Data stored in a data base relating rotational speed and thrust as adjustable variables is correlated with data on the penetration rate as controlled parameter to produce a matrix to enable prediction of penetration rate to be expected at known thrust and rotational rates. Likewise a similar matrix may be constructed for relating wear rate to adjustable variables for example speed and thrust. The parameters predicted from these variables at various values for the speed and thrust are used to construct a further matrix relating bit penetration and bit wear rates with cost per unit distance drilled and this third matrix searched for minimum cost. From the first two matrices rotation rate of the drill bit and thrust applied to the drill bit are adjusted to give a predicted penetration rate for minimum cost and the drill bit is operated at these conditions. All conditions are monitored and the information used to recalculate the various matrices to define the process.

    摘要翻译: PCT No.PCT / GB91 / 00348 Sec。 371日期:1992年9月4日 102(e)日期1992年9月4日PCT 1991年3月6日PCT公布。 公开号WO91 / 14214 PCT 日期1991年9月19日。在钻孔过程中,钻头推力和穿透力被监控。 存储在与旋转速度和推力相关联的数据库中的数据作为可调整变量与作为受控参数的渗透率的数据相关联,以产生矩阵,以使得能够以已知的推力和旋转速率预测穿透速率。 同样,可以构造类似的矩阵,用于将磨损率与可调变量相关联,例如速度和推力。 用这些变量预测的各种速度和推力数值的参数用于构建一个进一步的钻头钻头与钻头磨损率相关的矩阵,每单位钻孔成本为零,而该第三个矩阵搜索最小成本。 从前两个矩阵中,钻头的旋转速度和施加到钻头的推力被调节以给出最小成本的预测穿透速率,并且在这些条件下操作钻头。 监视所有条件,并用于重新计算各种矩阵以定义过程的信息。