Use of foam fluid for under balance drilling is a...

利用泡沫流体进行欠平衡钻井，是一种较安全的钻井技术。

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Being particularly against leakage function of RTTS packer with hydraulic anchor is applied in shallow or under balance pressure extensively.

RTTS封隔器因水力锚自身特有的防窜功能，在浅井测试及负压测试中具有广泛的应用。

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Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.

该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组，以防止该区古生界灰岩储层发生井漏及储层污染，从而保护油层。

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Yet it developed partly as a result of Israeli support for the idea of a Muslim religious group as a balance against Fatah under Yasser Arafat.

VOA: special.2009.01.10

By keeping women under the household of the men of their original family, the upper-class Romans tried to balance these different households in size and importance.

所以女子保留娘家的家户关系，有助于罗马上层阶级,平衡不同家户的规模及地位。

耶鲁公开课 - 新约课程节选

"If there was a hall of fame for budget directors,then Jack Lew surely would have earned a place for his service in that role under President Clinton, when he helped balance the federal budget after years of deficits."

VOA: standard.2010.07.13

As a nod to those homeowners who still owed a balance under the previous installment plan, the local public works forgave any balance due.

FORBES: Supreme Court Asked to Answer What's 'Fair' When it Comes to Taxpayers

The council has said it is under pressure to balance its budget and wants to run a 21st Century library service.

BBC: Question mark over Surrey library changes

They act as grazers on the ocean floor (manatees are the only other animals that do this), helping keep a balance under the sea for other creatures to live and breed.

FORBES: 12 Days of Charitable Giving 2012: Karen Beasley Sea Turtle Rescue and Rehabilitation Center