After the well has been drilled and cased, the first stage of our well test is to run a DST string in conjunction with:
Downhole data system Expro’s CaTS™ uses advanced wireless telemetry technology to transmit high quality bottomhole pressure and temperature data to surface in real-time using electromagnetic (EM) through-tubing/casing communications.
Having access to surface readout data provides early confirmation that the quality and quantity of data collected is adequate to characterise the reservoir, leading to optimised timing of the well test operations.
Tubing conveyed sampling
Collection of representative downhole fluid samples is the primary objective of most DST activity. Expro’s tubing conveyed sampling system provides a high-quality alternative to traditional DST type full-flow samplers.
The DST bottomhole assembly is designed around your test objectives and well parameters using tools with an established track record to deliver reliable performance. We provide multi-function and single-cycle cased hole DST tools for exploration well testing.
Our standard DST string includes:
Slip joint – allows the string to contract and expand with temperature without affecting the internal pressure or volume
Single shot circulating valve – single shot tool used to circulate tubing contents after over pressure of the annulus
Multi-function circulating valve – used to reverse out tubing contents to remove hydrocarbons and debris, change fluid weights including spotting nitrogen and efficiently spot viscous pills
Tubing tester valve – used to pressure test the tubing while running in the well
Safety valve – single shot tool used to shut in the well down hole with over pressure of the annulus
Tester valve – used to shut-in downhole to obtain formation pressure, as a fluid-loss control tool and a safety shut in-valve
Gauge carriers – houses high accuracy pressure and temperature gauges
Tubing conveyed sampler carrier – houses bottom hole samplers that can be selectively fired from surface
Hydraulic jars – allows adjusting the tension in the workstring to deliver a jarring action of the required intensity
Retrievable packer and safety joints – Expro provides a range of retrievable casing packers for sizes from 4 ½” to 9 5/8” casings
Tubing conveyed perforating systems – Industry standard perforating services
Our DST offering
Our DST offering
After the well has been drilled and cased, the first stage of our well test is to run a DST string in conjunction with:
Downhole data system
Expro’s CaTS™ uses advanced wireless telemetry technology to transmit high quality bottomhole pressure and temperature data to surface in real-time using electromagnetic (EM) through-tubing/casing communications.
Having access to surface readout data provides early confirmation that the quality and quantity of data collected is adequate to characterise the reservoir, leading to optimised timing of the well test operations.
Tubing conveyed sampling
Collection of representative downhole fluid samples is the primary objective of most DST activity. Expro’s tubing conveyed sampling system provides a high-quality alternative to traditional DST type full-flow samplers.
The DST bottomhole assembly is designed around your test objectives and well parameters using tools with an established track record to deliver reliable performance. We provide multi-function and single-cycle cased hole DST tools for exploration well testing.
Our standard DST string includes: