Invention Grant
US09334712B2 One trip perforating and washing tool for plugging and abandoning wells 有权
一次穿孔和洗涤工具,用于堵塞和排除井

One trip perforating and washing tool for plugging and abandoning wells
Abstract:
A single trip method allows for perforation, cleaning the annular space around the perforations in an existing tubular and then delivering a sealing material through a combination tool that is used for cleaning and then sealing. For sealing the tool is positioned by the lowermost perforations with a bypass around spaced seals that straddle the outlet port for the sealant. There is an open bypass through the tool and around the spaced seals as the sealant is delivered so that the sealant goes above and below the spaced seals. The open bypass allows the tool to be repositioned as the sealant is delivered. The tool is removed with the string. A separate through passage is selectively opened for removing excess sealant in conjunction with the bypass passages. The sealant can be squeezed with a seal on the string to effectively close the bypass letting pressure through the through passage squeeze.
Information query
Patent Agency Ranking
0/0