WellEnTech DrillTech™ PDM’s (Positive Displacement Motors) are designed with the primary focus on reliability and simplicity in design. This results in an extremely tough and versatile PDM, which offers the performance necessary for a variety of drilling applications. It also makes the DrillTech™ PDM one of the easiest to build, maintain and repair. All motor components are engineered with detail in mind and manufactured to exacting standards with only the highest quality materials. DrillTech™ PDM’s are available in sizes ranging from 1 11/16” to 3-1/2” diameters. DrillTech™ PDM’s are lubricated with the pumped fluid which means that a portion of the drilling fluid flows through the bearing stack to cool and lubricate the bearings. A “sleeve on sleeve” upper radial bearing provides support and controls the flow of fluid through the bearing stack.

The DrillTech™ PDM bearing pack features multiple tiers of super hardened thrust bearing races. This along with rock bit ball bearings, provide the endurance necessary for long grueling motor runs. A lower mandrel catch is standard in all motor sizes. This catch prevents the bit from being lost in the hole, in the event of a mandrel shaft failure. The DrillTech™ PDM uses a patented transmission coupling, which is the industry standard for flexible torque transmission in downhole motors. It has a long history of downhole use and has proven itself to be reliable and economical.

Our high performance power sections are designed to not only meet, but exceed your requirements. The elastomers are selected for stability and resistance to swell in the most common drilling fluids.

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WellEnTech String Mills, sometimes referred to as Watermelon mills, are designed to mill through collapsed casing and liners, eliminating key seats and doglegs, and extending whipstock windows. The blades on the mill are tapered top and bottom to allow reaming both up and down. A connection on the bottom allows a stinger to be run below the mill to keep it centred which prevents cutting out of the casing or sidetracking. String mills are often run piggyback with a tapered mill as a pilot.

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The WellEnTech Junk Mills come in a wide variety of designs and configurations. The Mills are dressed with either Tungsten Carbide Inserts, Crushed Carbide Matrix, a combination of both or Diamond Impregnated matrix. Available as Flat Bottomed (shown below), Concave, Convex. Taper (shown below), Stage or Bull nose, the Junk Mills can also be supplied as a blank body design or with integral blades (shown below). The Junk Mills are suitable for milling a range of materials and WellEnTech have extensive experience of designing mills and milling operations, providing the most suitable mill for a particular application.

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The WellEnTech CDC™ Underreamer is suitable for various downhole operations. It is a high expansion device and has an uninterrupted through bore. Depending on which blades the tool is dressed with will determine what OD the reamer will open out to. It can be deployed on either jointed pipe with a top drive or on coiled tubing with a PDM motor. The tool has three cutting blades which provide stability during operation. The large internal piston ensures maximum load is applied to the blades throughout the operation and a powerful spring pulls the blades back into the body when flow is stopped. Interchangeable blades provide a range of reaming diameters.

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The WellEnTech Washover Shoes come in a wide variety of designs and configurations. The Mills are dressed with either Tungsten Carbide Inserts, Crushed Carbide Matrix, a combination of both or Diamond Impregnated matrix. Available as Flat Bottomed or a wave profile the Washover shoe can be supplied as one piece or with a drive sub. The Washover Shoes are suitable for milling a range of materials and WellEnTech have extensive experience of designing shoes and milling operations, providing the most suitable Washover Shoe for a particular application.

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The WellEnTech CDC™ Hydraulic Anchor is used for various downhole operations where there is a requirement for anchoring a tool string centrally within a wellbore. It is a high expansion device and has an uninterrupted through bore. It can be deployed on either Jointed Pipe or on Coiled Tubing. The tool has three blades which provide stability during operation. The large internal piston ensures maximum load is applied to the blades throughout the operation and a powerful spring pulls the blades back into the body when flow is stopped. The unique blade design enables it to grip inside a range of diameters.

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The WellEnTech Hydraulic Pipe Cutter is a device for severing tubulars downhole. It can be deployed on either jointed pipe with a top drive or on coiled tubing below a PDM motor. The tool has three cutting knives which provide stability during operation, each of which is dressed with premium machine tool inserts which are designed to cut material cleanly and efficiently. The dual piston design ensures maximum load is applied to the blades throughout the operation. Interchangeable nozzles generate the required pressure to activate the cutter and are angled in such a way as to direct flow back up-towards the knives.

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