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  • Remove sand and solids in a single run
  • Eliminate the need for nitrogen for circulation, thus reducing logistical issues and reducing costs

  • Ultralow-pressure reservoirs
  • 清理和卸载
  • Heavy-oil and sand-producing wells



When standard circulating methods aren’t effective for cleaning out your low-pressure wellbores, count on concentric coiled tubing (CCT) solutions from Baker Hughes. An integral part of our wellbore cleanout and vacuuming systems, our CCT solutions help isolate the fluids from the reservoir and allow continuous returns—without the supply and logistics challenges of using nitrogen.


The Baker HughesSand-Vac™,Well-Vac™,Tele-Vac™解决方案使用CCT与专有的下井可开关喷气泵结合使用,以从无法使用标准循环方法处理的超压力井中去除固体和液体。该系统使用单相流体,与循环硝化流体相比,可以通过简化的物流和降低成本进行清理。

Liquid pumped down the CCT’s inner tubing string and through the jet pump nozzle creates a localized pressure drop that essentially vacuums wellbore fluids and entrained solids.

While deployed in the well, the system can be switched between multiple operating modes to achieve all of your objectives in a single run. In Sand-Vac and Well-Vac mode, the combined return flow enters the jet pump diffuser and recovers pressure from the nozzle to drive the return fluids to the surface via the CCT annulus.

In your extended-length producing intervals, these systems handle crossflow or thief-zone challenges that typically hamper conventional circulation cleanouts.

Contact us to learn how concentric coiled tubing can optimize your well cleanout operations.

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