TK908DH well was an deepest well with dual lateral, and the difficulty of drilling run up to international grade scale TAML4 level.
TK 908dh井是目前国内完成最深的双分支井，施工难度达到国际分级标准TAML 4级。
TK908DH well was an deepest well with dual lateral, and the difficulty of drilling run up to international grade scale TAML4 level.
TK 908dh井是目前国内完成最深的双分支井，施工难度达到国际分级标准TAML 4级。
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