公开(公告)号：US20130220427A1

公开(公告)日：2013-08-29

申请号：US13761622

申请日：2013-02-07

Applicant: BP EXPLORATION OPERATING COMPANY LIMITED

Inventor： Patrick James Calvert ,  Paul Roderick Allen ORAM

IPC: F17D1/16

CPC classification number: F17D1/16 ,  E21B43/12 ,  G05D7/0635 ,  Y10T137/0318 ,  Y10T137/0352 ,  Y10T137/0396 ,  Y10T137/2499 ,  Y10T137/2931 ,  Y10T137/7761

Abstract: A method and apparatus for mitigating slug formation in a multiphase fluid stream that is flowing through a conduit wherein the conduit comprises a first portion and a second portion which is upwardly inclined to the first portion and wherein the multiphase fluid stream comprises a gaseous phase and a liquid phase, the method comprising the steps of: (a) determining the pressure in the conduit upstream of a slugging zone; (b) determining the pressure in the conduit downstream of the slugging zone; (c) determining the actual pressure difference across the slugging zone by subtracting the downstream pressure from step (b) from the upstream pressure from step (a); (d) determining the error between a target pressure difference and the actual pressure difference; (e) producing a signal comprising a first component which is proportional to the error and a second component which is proportional to the rate of change of the error over time; and (f) using the signal produced in step (e) to control the position of an adjustable choke valve located downstream of the slugging zone so as to stabilise variations arising in the actual pressure difference over time.

Abstract translation: 一种用于减轻流过导管的多相流体流中的塞状物形成的方法和装置，其中导管包括第一部分和向上倾斜于第一部分的第二部分，并且其中多相流体流包括气相和 液相，所述方法包括以下步骤：（a）确定所述导管在压块区上游的压力; （b）确定压块区下游的导管内的压力; （c）通过从步骤（a）的上游压力减去来自步骤（b）的下游压力来确定跨越压块区段的实际压力差; （d）确定目标压力差与实际压力差之间的误差; （e）产生包括与误差成比例的第一分量的信号和与误差随时间变化的速率成比例的第二分量; 和（f）使用步骤（e）中产生的信号来控制位于阻塞区下游的可调节节流阀的位置，以便稳定实际压力差随时间的变化。