CAREERS
CONTACT
MENU

Mill Open

Mill Open

Download product sheet

The TCO Mill Open glass plug provides a robust seal under extreme downhole conditions, withstanding up to 175°C and 100 tonnes of pressure. When required, the plug is mechanically opened by a variety of removal options; spear opening, slickline, tractor on e-line, coil tubing or drill pipe. Upon removal, the TDP allows full bore access for all future interventions.

It can also be supplied in both standard and customized bore diameters to ensure it fully meets your specific operational requirements.

How it works

1. Installation

The plug is run into the well and set at the desired depth.

2. Barrier Function

The glass component acts as a pressure barrier, isolating zones or holding fluids in place.

3. Mill Open

When access is needed, the plug can be speared or milled open by any means of intervention service and guarantees full ID after removal.

Features

Large Bore Access

ISO 14998 V0 Certified Barrier

Laminated Glass Material

Multiple Mechanical Opening Methods

Benefits

No External Personnel Required

Cost-Effective, Low Risk, Efficient Barrier Removal

Full ID Guaranteed Upon Opening

Applications

Completion Barrier Plug

Packer Setting Device

Pressure Test Device

Case Studies

View all
Middle East
TDP-3 plug saves operator $6 million
Download
Middle East
Enabling reliable lower completion
Download
Middle East
TDP-3E plug saves 20 million NOK
Download

Get in touch

Our global presence means we’re ready to implement our solutions whenever and wherever you need them. Get in touch with a member of our team today.
Contact us

Related products

Glass Barrier Plug Accessories

Explore our Glass Barrier Plug Accessories, including the new Autofill Sub.
More info

Remote Open

Remote open barrier plugs feature a V0-rated glass barrier element for high-integrity sealing. A remotely pressure-activated valve system enables intervention-free opening. Other benefits include full bore access after activation, multi-cycle operation, and debris management. Certified for use in high-pressure, high-temperature wells.
More info

Bypass Remote Open

The DTHP and DSBP include a V-0 rated glass barrier. An erosion tested self-filling bypass sleeve allows auto filling and fluid circulation during installation, and remote sleeve closure to establish a V0-rated barrier. Interventionless plug opening is enabled via remote pressure-activation, enabling full-bore access and optimized completion efficiency in both shallow and deep-set applications
More info

Pump Open

The TDP-PO plug is a single-cycle, V0-rated glass barrier plug activated by reaching a predefined shear pressure. It’s ideal for packer setting, tubing testing, and flotation applications – especially in long horizontal wells where interventionless operation and cost-efficiency are critical.
More info

Mill Open

The TDP-MO plug is a robust, V0-rated laminated glass barrier designed for packer setting, tubing testing, and reservoir isolation. It’s mechanically removed via slickline, coiled tubing, drill pipe, or milling – ideal for wells requiring direct intervention and cost-efficient operations.
More info