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zk19900227木蟲(chóng) (著名寫(xiě)手)
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[求助]
鼠洞rat hole 是什么? 已有1人參與
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| 如題 |

至尊木蟲(chóng) (知名作家)
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rathole 1. n. [Drilling] A storage place for the kelly, consisting of an opening in the rig floor fitted with a piece of casing with an internal diameter larger than the outside diameter of the kelly, but less than that of the upper kelly valve so that the kelly may be lowered into the rathole until the upper kelly valve rests on the top of the piece of casing. 2. n. [Drilling] Extra hole drilled at the end of the well (beyond the last zone of interest) to ensure that the zone of interest can be fully evaluated. The logging tool string may be as much as 120 ft [36.5 m] in length, so the rathole allows tools at the top of the logging string to reach and measure the deepest zone of interest. In addition, there is usually a small amount of extra hole drilled to allow for junk, hole fill-in and other conditions that may reduce the effective depth of the well prior to running logging tools. 3. n. [Drilling] Extra hole drilled at the bottom of the hole to leave expendable completion equipment, such as the carriers for perforating gun charges. 注意還有一種叫mousehole的,中文叫小鼠洞,是用于放鉆桿的(便于鉆井時(shí)連接)。 |
至尊木蟲(chóng) (知名作家)
至尊木蟲(chóng) (知名作家)
專家顧問(wèn) (著名寫(xiě)手)
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專家經(jīng)驗(yàn): +593 |
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大鼠洞: 是用于放方鉆桿,由于方鉆桿一般12~15米左右,所以在方井內(nèi)底部還需要打一個(gè)3~5米左右的洞(如果方鉆桿斜對(duì)下來(lái)不在方井內(nèi)而在地面的話就需要打5~8米),是用螺桿或渦輪帶鉆頭打出的,一般使用16"或12-1 /4"鉆頭打洞,下13-3/8" 或 9-5/8" 套管。 |
至尊木蟲(chóng) (知名作家)
榮譽(yù)版主 (知名作家)

至尊木蟲(chóng) (知名作家)
榮譽(yù)版主 (知名作家)

木蟲(chóng) (著名寫(xiě)手)

木蟲(chóng) (著名寫(xiě)手)

木蟲(chóng) (著名寫(xiě)手)

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