Drilling and Completion

Sigra supply light weight, compact well control systems for smaller size wells. The standard diameters for the annular BOPs are 101 mm (4”), 128 mm (5”) and 168 mm (6 5/8”). The pressure range is from 7 to 21 MPa (1000 to 3000 psi) depending on the model. With these come chokes, wireline strippers and activation units. The 101 mm unit is frequently used with HQ wireline coring while the 128 mm (5”) units are generally used with PQ coring. The 168 mm (6 5/8”) unit is frequently used in workover applications.

Sigra can also make very high temperature metallic seal well control systems.

Sigra supplies and hires borehole survey tools that take several forms. In each case the tool contains triaxial magnetometers and accelerometers to determine the inclination, azimuth and tool face angle.

Sigra manufactures inflatable packers to suit the application. We have made packers for well testing from 100 (4”) to 305 mm (12’) diameter wells. We have also made very long packers (5 m) for water reinjection and small grouting packers for cement or resin injection.

One of the packers in our range is an external casing packers to permit casing to be cemented in a well above the packer location.

Sigra also has a product that is used to collect fines (sand production) from a well and send it through the pump to surface. This increases the period between workovers.

Managed Pressure Drilling System

Managed pressure drilling is a technique used to enable drilling to be undertaken from below the water table.

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Well Control Systems

Sigra manufactures a suite of well control tools specifically for use in HQ size wire line coring. They are ideally suited for use in coal exploration where gas may be expected. The system may also be used for open hole drilling.

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Borehole Survey Tools

Sigra has an electronic survey tool module that is based on triaxial magnetometers and accelerometers. It can be configured to record on board at a fixed interval.

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Packers

Sigra manufactures a range of inflatable borehole packers to suit specific requirements.

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External Casing Packers

The Sigra external casing packer is an easily set packer for use when cementing holes above a set depth. In its initial form, it is built on 7″ casing with API Buttress threads.

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In-well Fines Separators

Many wells produce coal fines or sand during their life. The settlement of these leads to well blockage and the need for costly workovers, including removal of the pump and the cleaning out of the well.

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