| 摘要 |
<p>A circulating valve (82) and associated methods of using same provide control of fluid flow within a subterranean well. The circulating valve (82) includes a fluid pressure storage chamber in fluid communication with the exterior of the valve (82). When positioned in a wellbore (88), fluid pressure in an annulus (86) between the valve (82) and the wellbore (88) is stored in the storage chamber. A subsequent, relatively rapid, increase in the annulus fluid pressure causes the valve (82) to operate. <IMAGE></p> |
