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Downhole testing tools

Build the test string your well needs, from the slip joints at the top to the packer, gauges and shock absorber at the bottom.

Test string components you can rely on

Choosing the right tools for the downhole test string decides whether a test meets its objectives and characterizes the reservoir correctly.

Our annulus pressure operated, ball-throw and mechanically operated tools let you assemble a string for cased-hole testing, perforating and testing, or acid fracturing and testing, in standard or sour service.

Downhole test tool offerings

Slip Joints

Absorb string length changes

Expansion joints that take up heave, thermal growth and pressure effects on the string so the packer stays put.

Circulating and Reversing Valves

Circulate and reverse out on demand

Single-shot and multicycle valves for circulating, reversing out and spotting fluids at any point of the test.

Downhole Tester Valves

Open and shut in the well downhole

Ball and flapper tester valves for flow and build-up periods, operated by annulus pressure, internal pressure or pipe movement.

Downhole Safety Valves

Shut the well in when it matters

Valves that isolate the formation at the end of the test or in an emergency, including storm valves for floating operations.

Hydraulic Jars

Free a stuck string

Hydraulic jars that deliver upward and bidirectional impact to shake a stuck test string loose.

Safety Joints

Release quickly above the packer

Safety joints, releasing devices and fishing tools for fast disconnection and recovery of the string.

Packers

Isolate the zone under test

Retrievable cased-hole and open-hole packers, straddle packers and anchors built for high differential pressure.

Pressure Test and Fill-Up Valves

Test the tubing while running in

Flapper and bypass valves for filling and pressure-testing the string on the way into the hole.

Auxiliary Tools

Gauges, samplers and string accessories

Gauge carriers, samplers, drain valves, shock absorbers and other components that complete the test string.

Planning a well test or restocking your DST fleet?

Tell us the casing size, pressure rating and service conditions. We will come back with a configured string and a quotation.

Find a tool

Search by tool name, size or specification

Long Long Slip JointCompensates for vessel heave and thermal and pressure effects on the string Extension PipeAccommodates string length changes and absorbs perforating shock Flapper Pressure Test ValveFull-bore valve for repeated pressure testing of the work string while tripping in AP Flapper Pressure Test ValveRupture-disc operated flapper valve for repeated pressure testing while tripping in AP Bypass Pressure Test ValveFull-bore pressure test valve and bypass valve in one tool APS Circulating Valve & AP Circulating ValveSingle-shot safety circulating valve for the end of a well test HPAPS Circulating Valve & HPAP Circulating ValveHigh-pressure safety circulating valves for deep wells Flapper Circulating ValveSafety valve, squeeze valve and circulating valve in one tool Needle-Type Drain ValveRecovers the fluid sample trapped between two ball valves at surface Sleeve-Type Drain ValveTransfers the sample trapped between two closed ball valves SIERRA Multi Circulating ValveAnnulus pressure-operated circulating valve that opens and closes repeatedly MAIN Test ValveAnnulus pressure-operated downhole test valve for repeated open/close KIKO Locked-Open Test ValveTest valve that opens and closes repeatedly and locks open without holding annulus pressure Locked-Open Test Valve for Shallow WellsSimple lock-open test valve for wells with hydrostatic pressure below 5,500 psi Select Test ValveMulti-cycle test valve with switchable standard and locked-open modes AP Open-Shut Off ValveSingle open/close cycle valve with circulation after shut-in AP Shut-Off Valve & AP Open ValveOne-time full-bore valves that together complete one open/close cycle AP SamplerFull-opening sampler that captures formation fluid downhole Gauge CarrierCarrier for downhole pressure and temperature gauges, designed to suit the gauge HAMMER JarFull-bore hydraulic jar for freeing a stuck testing string TRUST Safety Joint & Fishing ToolReleases the string above a stuck packer and recovers the stuck part Fishing ToolRetrieves the stuck part below a released TRUST safety joint TRUST Circulating ValveLocked-open / locked-closed circulating and bypass valve for the TRUST packer SSD Hydraulic Circulating ValveWeight-operated bypass / circulating valve with hydraulic delay MRO Storm ValveTemporary well shut-in valve for storms and surface maintenance TRUST PackerLarge-bore retrievable hookwall packer for testing, treating and squeezing MR PackerHigh-strength retrievable packer for perforating + acidizing + testing MP PackerRetrievable packer with built-in concentric bypass Safety Joint below TRUST PackerReleases a stuck perforating gun below the packer BSN-3 Safety ValveMaster valve that controls well flow and can cut wireline and coiled tubing Internal Pressure Operated Circulating ValveFull-bore circulating valve opened by internal differential pressure Normally Open ValveCirculating valve closed by dropping a ball — used for fluid replacement in acidizing Safety Fluids Replacement ValveBall-operated safety circulating valve for fluid replacement above a shut-in ball valve Normally Closed ValveCirculating valve opened by dropping a ball — used for circulation after testing Dual Passage Normally Closed ValveFull-opening kill circulating valve with two circulation passages Shut-Off Circulating ValveOne-shot valve that seals the lower zone and opens circulation to the upper zone Ball Receive SubCatches the dropped steel ball without restricting flow Releasing DeviceBall-operated release for perforating guns in completion strings Reverse Circulating ValveOpens the drill string to the annulus for reverse circulation Multi-Flow Test ValveDownhole shut-in valve operated by picking up and slacking off the string Spring Test ValveFull-bore spring-closed test valve operated by string movement Full Bore Test ValveFull-opening test valve with bypass, operated by string movement Hydraulic Locking JointHydrostatic hold-down that keeps the packer set while the tester is cycled Extension JointSquare-mandrel joint giving 550 mm of free stroke for tester operation JarUpward-acting jar for freeing a stuck sieve tube or packer Safety JointCoarse-thread safety joint for recovering the string above a stuck packer Cased Hole Straddle PackerUpper packer for isolating a zone between two packers in cased hole Slips PackerRetrievable weight-set hang packer with built-in bypass Sieve Tube & Grooved Tail PipeFiltered flow entry for formation fluid into the test string Gauge CarrierCarrier for downhole gauges with shock damping Open Hole Bypass ValveWeight-operated bypass for open-hole testing with delayed opening Safety SealHydraulic hold-down that keeps the open-hole packer sealed while the tester is cycled Open Hole Packer — Metal Cup TypeRetrievable weight-set open-hole test packer with metal-cup element support Open Hole Packer — Expansion Shoe TypeRetrievable open-hole test packer with expanding-shoe element support Side Wall AnchorBorehole-wall anchor that supports the packer in open-hole straddle tests BumperAbsorbs perforating shock below the packer in TCP + DST jobs Radial & Vertical Shock AbsorbersProtect gauges and the string from TCP gun shock loads AP Downhole Throttle ValveAnnulus-operated downhole choke that prevents hydrate formation in gas-condensate wells Bidirectional Hydraulic JarUp- and down-jarring tool for coiled-tubing operations