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Multi-Cycle Annular Pressure Operated DST

Slip Joint

The Slip Joint is a telescoping joint that accommodates tubing movement caused by temperature changes during testing operations. The Slip Joint provides free travel of the tubing string as it expands and contracts to isolate the downhole tools from these forces. If required, multiple Slip Joints are run in tandem to provide a longer stroke.

Single Shot Circulating Valve AND Single Shot Fill Valve

The Single Shot Circulating Valve is used to reverse circulate fluids out of the drill stem at the end of a test. When a pressure disc is ruptured, the applied annulus pressure from the burst moves the mandrel and allows fluid through the ports. As the mandrel moves, a snap ring engages to hold the mandrel and keep the tool in the circulating position.

Pump through flapper valve

The Pump Through Flapper Valve (PTFV) is an annular rupture disc-controlled emergency safety shut-in valve used in HPHT environments where a secondary downhole barrier is required. Once the tool is closed, the flapper mechanism acts as a check valve to pump kill fluid into the well while preventing backflow. The tool can be configured with open circulation ports above the flapper to allow reverse circulation.

Multi Cycle Circulating Valve

The Multi-Cycle Circulating Valve (MCCV) is a differential pressure operated Circulating Valve that offers unlimited open and closed cycles. Shear pins hold the tool in the closed position during the run-in-hole. Once on depth, applied pressure shears the pins, allowing the tool to cycle through forward circulating, reverse circulating and closed positions.

Gauge Carrier - Northstar DST

The Gauge Carrier holds up to four or eight electronic memory pressure and temperature gauges depending on the model.

M2 Tester Valve

The M2 Tester Valve is an annular pressure controlled, unlimited cycle, down hole Test Valve designed for use in HPHT environments. The tool features a lock open mechanism to safely run through tubing services including coiled tubing, wire line, and slick line.

tubing tester valves

The Tubing Tester Valve (TTV) is an annular rupture disc controlled pressure test valve used to pressure test the tubing or drill string.

Dual Shot Ball Valve

The Dual Shot Ball Valve is an annular rupture disc controlled ball valve that can be set to have one or two individual ball cycles. The Dual Shot Ball Valve can be run in-hole in either the open or closed position.

Gauge Carrier

The Gauge Carrier holds up to four or eight electronic memory pressure and temperature gauges depending on the model.

Hydraulic Jar

The Hydraulic Jar is used in the event that equipment becomes stuck in the well bore and provides an upward shock to assist in freeing the tools. Over-pull at surface is applied to the string, which causes oil to move through a flow restrictor.

Tension Safety Joint

The Tension Safety Joint is a two-stage emergency disconnect tool that can be used to mechanically separate the drill string in a controlled way. If the string is stuck at a packer or elsewhere, it can be operated to recover tools above the Safety Joint. The lower half of the safety joint that is left down hole provides a connection for fishing tools.

Deep DGR Tool

The DEEP DGR Casing Packer is a mechanical set, double grip retrievable service Packer designed to be run in hostile environments. The HPHT Packer uses tungsten carbide slips to engage on high grade casing typically present in high pressure wells.

Boost Hydraulic Relay L

The Boost Hydraulic Delay tool is an annular pressure controlled tool that is designed to provide a reference pressure to the Multi-Cycle Tester Valve. 

Description

Cased hole drill stem tests (DST) are conducted after the well has been cased and the formation of interest is behind casing. The casing is perforated by wireline perforating guns or with tubing conveyed perforating (TCP) guns connected to the bottom of the DST string to open the casing to the formation. The DST tool assembly is run at the bottom of the temporary production tubing or drill pipe (work string) and used for downhole well testing (inflow testing) and stimulation (injection).

Maximum well control is achieved with redundant valves controlling flow and multiple circulation points. The tool assembly is custom designed for each operation with adequate expansion joints (slip joints) installed to compensate for thermal and hydraulic expansion/contraction of the work string. Down hole pressure/temperature gauges record data throughout the tool string. The gauge data recorded below the closed downhole valve closest to the formation sandface is used for pressure transient analysis (PTA). Isolating the formation with pressure recorded below the downhole valve drastically reduces the amount of time required to collect the necessary data due to the elimination of dead volume (wellbore storage effect) in the workstring.

Benefits

Deliverables

Specifications

Slip Joint

The Slip Joint is a telescoping joint that accommodates tubing movement caused by temperature changes during testing operations. The Slip Joint provides free travel of the tubing string as it expands and contracts to isolate the downhole tools from these forces. If required, multiple Slip Joints are run in tandem to provide a longer stroke.

Single Shot Circulating Valve AND Single Shot Fill Valve

The Single Shot Circulating Valve is used to reverse circulate fluids out of the drill stem at the end of a test. When a pressure disc is ruptured, the applied annulus pressure from the burst moves the mandrel and allows fluid through the ports. As the mandrel moves, a snap ring engages to hold the mandrel and keep the tool in the circulating position.

Single Shot Circulating Valve AND Single Shot Fill Valve

The Single Shot Circulating Valve is used to reverse circulate fluids out of the drill stem at the end of a test. When a pressure disc is ruptured, the applied annulus pressure from the burst moves the mandrel and allows fluid through the ports. As the mandrel moves, a snap ring engages to hold the mandrel and keep the tool in the circulating position.

Pump through flapper valve

The Pump Through Flapper Valve (PTFV) is an annular rupture disc-controlled emergency safety shut-in valve used in HPHT environments where a secondary downhole barrier is required. Once the tool is closed, the flapper mechanism acts as a check valve to pump kill fluid into the well while preventing backflow. The tool can be configured with open circulation ports above the flapper to allow reverse circulation.

Multi Cycle Circulating Valve

The Multi-Cycle Circulating Valve (MCCV) is a differential pressure operated Circulating Valve that offers unlimited open and closed cycles. Shear pins hold the tool in the closed position during the run-in-hole. Once on depth, applied pressure shears the pins, allowing the tool to cycle through forward circulating, reverse circulating and closed positions.

Gauge Carrier - Northstar DST

The Gauge Carrier holds up to four or eight electronic memory pressure and temperature gauges depending on the model.

M2 Tester Valve

The M2 Tester Valve is an annular pressure controlled, unlimited cycle, down hole Test Valve designed for use in HPHT environments. The tool features a lock open mechanism to safely run through tubing services including coiled tubing, wire line, and slick line.

tubing tester valves

The Tubing Tester Valve (TTV) is an annular rupture disc controlled pressure test valve used to pressure test the tubing or drill string.

Dual Shot Ball Valve

The Dual Shot Ball Valve is an annular rupture disc controlled ball valve that can be set to have one or two individual ball cycles. The Dual Shot Ball Valve can be run in-hole in either the open or closed position.

Gauge Carrier

The Gauge Carrier holds up to four or eight electronic memory pressure and temperature gauges depending on the model.

Hydraulic Jar

The Hydraulic Jar is used in the event that equipment becomes stuck in the well bore and provides an upward shock to assist in freeing the tools. Over-pull at surface is applied to the string, which causes oil to move through a flow restrictor.

Tension Safety Joint

The Tension Safety Joint is a two-stage emergency disconnect tool that can be used to mechanically separate the drill string in a controlled way. If the string is stuck at a packer or elsewhere, it can be operated to recover tools above the Safety Joint. The lower half of the safety joint that is left down hole provides a connection for fishing tools.

Deep DGR Tool

The DEEP DGR Casing Packer is a mechanical set, double grip retrievable service Packer designed to be run in hostile environments. The HPHT Packer uses tungsten carbide slips to engage on high grade casing typically present in high pressure wells.

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