Reverse Cementing Tool
Reverse Cementing Tools Principles and How it Works
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Drilling-in, Reaming-in and/or Running and Cementing Liners can be a tricky business.

 

Liners are often run across challenging hole conditions to isolate lost circulation or weak formations that degrade over time or have low fracture gradients.

 

Ensuring that a liner is properly cemented across challenging hole conditions and reservoir sections can be critical to the success of the well, especially when preventing hole degradation, isolating fluid theft zones and/or isolated water from oil and gas production.

 

Oilfield Innovations have a reverse cementing or top-down gravity cementing tool that can be used to drill-in, ream-in and/or wash-in a liner to ensure that it is reaches the intended total depth and is properly cemented to isolate troublesome portions of the well.

 

Conventional cementing pumps down the inside of the liner and up the outside, whereas, after drilling, reaming or washing a liner to depth, a dart can be dropped through the drill pipe to activate a packer against the previous casing and to divert flow through back side with return circulation up the inside of the liner.

 

Gravity, Top-Down, Squeeze and/or Reverse Cementing are all names for cementing down the annulus and up the internal diameter of the liner, which is more effective than conventional cementing because gravity pulls the heavier cement downward to ensure that it covers the entire liner.

 

With Oilfield Innovations' patented Reverse Cementing Tool the liner can be drilled, reamed and/or washed into the hole.  A dart can them be dropped to activate a packer element at the top of the tool and to divert cement from the drill pipe internal diameter to the annulus.  Returns are taken through the liner during drilling and cementing to minimise the effective circulating density exerted on the formation.

 

After reaching depth and cementing, an additional dart is used to set an expandable liner hanger and the string is pulled from the shoe to close it.

 

Accordingly, the liner can be carried and/or drilled in, whereby rotation can continue during squeeze cementing to install a barrier in the most challenging well conditions.

 

Our Reverse Circulation Tool can also be used to drill or wash liners into the well bore using a dual gradient method.

 

Gauge Button for Well Design

 

 

 

 

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Reverse Cementing Tool
Reverse Cementing Tools Principles and How it Works
Gauge Button for Well Design
Reverse Cementing Tools Principles and How it Works
Reverse Cementing Tool
Gauge Button for Well Design
Gauge Button for Well Design
Reverse Cementing Tools Principles and How it Works
Reverse Cementing Tool
Gauge Button for Well Design
Reverse Cementing Tools Principles and How it Works
Reverse Cementing Tool
Gauge Button for Well Design
Reverse Cementing Tools Principles and How it Works
Reverse Cementing Tool
Gauge Button for Well Design