DRILLMEC 7TS600 Pump

To facilitate rapid evaluation by engineers and procurement specialists, the following table clearly lists the key technical parameters of the DRILLMEC 7TS600 mud pump.

The DRILLMEC 7TS600's 7-inch short stroke and 150SPM high-speed design is key to its compact design and high displacement characteristics. This design makes it ideal for mobile drilling rigs and offshore platforms where space is limited.

Frame construction

The frame of the pump is welded by thick steel plate. After welding, it is subjected to strict overall stress relief heat treatment, which eliminates the internal stress generated in the welding process, thus obtaining extremely high rigidity and strength. The integrated oil sump and scientific oil system inside the frame provide reliable guarantee for the cooling and lubrication of key components.

Crankshaft assembly

Material and process: the crankshaft is the power end of the core transmission components, we use high-strength one-piece forged alloy steel or high-quality cast alloy steel (42CrMo) for manufacturing.

Bearing configuration: heavy-duty double row spherical roller bearings are installed at both ends of the crankshaft, while cylindrical roller bearings with high load capacity are used at the large end of the connecting rod

Gear and pinion shafts

Type and material: classic herringbone gear design for power transmission. The main gear (ring gear) is fastened to the crankshaft by an interference fit, and the pinion shaft is precision machined from a single piece of forged alloy steel (42CrMo) .

Design advantages: herringbone gear transmission is stable, good meshing, can transmit huge torque, and in the process of operation can naturally offset the axial force, effectively protect the bearing, reduce noise and vibration, extend the service life of the whole transmission system.

Crosshead and guide plate

Material: the crosshead is made of high quality ductile iron and the guide plate is made of bearing grade manganese bronze.

Design advantages: steel crosshead and bronze guide plate constitute the ideal low-friction motion pair. Manganese bronze has excellent wear resistance and self-lubrication, which can effectively prevent gluing even under boundary lubrication conditions, ensure the smooth and accurate reciprocating motion of the crosshead, and significantly extend the service life of the power end.

Lubrication system

The 7TS600 uses a dual lubrication mode that combines forced lubrication with splash lubrication. Built-in gear oil pump will be forced through the pipeline delivery of lubricating oil to the crosshead, guide plate and all the key bearings, at the same time, the rotation of the gear up the oil pool, the formation of oil mist, the gearbox interior is adequately spattered with lubrication.

Modular design

Structure: the hydraulic end adopts valve-on-valve (straight-through type) structure, which is composed of three independently replaceable forging modules. This design not only makes the flow channel more smooth, improve the volumetric efficiency of the pump, more importantly, greatly simplified on-site maintenance. When a module problems, can be quickly replaced alone, without the need to remove the entire hydraulic end, thus greatly reducing downtime maintenance time.

Cover type: for easy quick replacement of the valve assembly, the cover is ruggedly threaded and compatible with the P-Quip quick replacement system, further improving maintenance efficiency.

Cylinder module material and manufacturing process

The quality of the hydraulic cylinder is the core factor to determine the life of the hydraulic end. Our manufacturing process follows a rigorous quality control system to ensure that every component is above industry standards:

Top material selection: we choose the vacuum degassing quality forged alloy steel, 35CrMo or 40CRMNMO, as the cylinder module raw material. The forging process ensures that the internal structure of the material is dense, and there are no casting defects such as porosity and inclusions, which ensures the strength and toughness of the module from the source.

Precision Heat Treatment: the forged module is subjected to a multi-stage, computer-controlled quenching and tempering process (quenching + high-temperature tempering) to achieve an optimal balance of strength and toughness, capable of withstanding up to 5, 000 PSI.

High-precision processing: all the inner holes, cones and sealing surfaces are processed on the advanced CNC boring machine in one clamping to ensure high dimensional accuracy and geometric precision.

Enhanced surface treatment: the inner surface of the fluid cylinder is treated by electroless nickel plating to form a uniform and dense corrosion-resistant protective layer, which effectively resists the chemical erosion of the drilling fluid.

Strict quality inspection: each factory hydraulic cylinder module must pass the hydrostatic test of 1.5 times the working pressure, as well as ultrasonic, magnetic particle inspection and other non-destructive testing, fully meet or even exceed the API 7K specification requirements.

Valve Assembly

Standard & Type: 7TS600 Standard API # 6 full open valve assembly. This design provides maximum flow area and reduces fluid washout, especially for high-flow applications.

Material and workmanship: body and seat are also made of top forged alloy steel (20CrMnTi or AISI 8620) . After carburizing and quenching treatment, the surface hardness of the key working surface is as high as HRC ≥60, while the core still maintains good toughness.

Liners

High chromium bimetallic cylinder liner: composed of tough forged steel (45 # steel) casing and high chromium (Cr 26-28%) wear resistant inner liner formed by centrifugal casting process. The hardness of the inner sleeve is up to
HRC 59-65, and the housing provides sufficient strength to withstand pump pressure. This structure achieves a perfect balance between wear resistance and compression resistance, providing a stable operating life of more than 800 hours under conventional drilling fluid conditions.

Zirconia ceramic cylinder liner: the inner liner is made of high purity zirconia ceramic material. Through advanced phase transformation toughening technology, its hardness (HV > 1120) , wear resistance, corrosion resistance and thermal shock resistance far exceed those of high chromium materials. Its ultra-smooth inner surface significantly reduces friction with the piston, prolongs piston life, and reduces water consumption of the flushing system. In harsh conditions, its service life can reach more than 4000 hours, is to reduce long-term operating costs of wise investment.

Piston and rod

Pistons: we offer one-piece vulcanized bonded pistons with a high-strength forged steel (40CR or 45 # steel) piston core bonded firmly to a high-performance polyurethane (PU) or nitrile rubber (NBR) rubber skin. This design is highly resistant to high-pressure extrusion deformation, ensuring a reliable seal at pressures up to 5,000 PSI. We offer different rubber formulations for both water-based and oil-based muds with up to 250 °F (121 °C) temperature resistance.

Piston rod/intermediate rod: Made of high strength forged alloy steel (42CrMo or SAE 4140) and integrally quenched and tempered for excellent comprehensive mechanical properties. The surface of the rod body is treated by precision grinding and hard chromium plating, which not only ensures extremely high surface hardness and wear resistance, but also has excellent corrosion resistance.

Valve assembly and seals

Valve Assembly (API # 6) : fully open body and seat in forged alloy steel (20CrMnTi/AISI 8620) , carburized and hardened to HRC 60 + . Valve plug-in (insert block) using wear-resistant, oil-resistant polyurethane (PU) material, to ensure that the high-frequency impact can still provide a reliable seal and long service life.

Seals and gaskets: all seals are made of high-quality NBR, HNBR or PU materials, optimized for different working media and temperatures to ensure that the hydraulic end and the power end of each connection are free from leakage concerns.

Important system accessories

Pulse buffer: a bladder type pulse buffer (KB-75 compatible model) mounted on the discharge line is an essential accessory. It absorbs the pressure pulsation generated by the pump stroke through the internal nitrogen bag, so that the liquid flow in the discharge line is more stable. This can not only protect the downstream pressure gauges, sensors and manifolds, but also significantly improve the working environment of the MWD/LWD tool and improve the quality of data transmission.

Safety valves: API-compliant shear pin safety valves are the last safety barrier for pumps and lines. In the event of an abnormally high system pressure, the shear pin will be cut first, instantly releasing the pressure to protect the pump body, line and personnel.

Liner flushing system: consists of a small independent centrifugal pump, water tank and spray line. The system continuously sprays cooling and lubricating fluid on the contact surface between the piston and the cylinder liner, which effectively flushes away abrasive particles and reduces the working temperature, thus doubling the service life of the cylinder liner and the piston, it is a key investment to reduce the cost of consumables.

The following table details the theoretical performance parameters of Drillmec 7TS600 mud pump under different cylinder sizes and stroke speeds, providing an accurate basis for your drilling hydraulic parameter design.

(the data is based on a mechanical efficiency of 90% and a volumetric efficiency of 100%)

Note: maximum speed is limited to 137spm under the 4-inch liner to protect equipment.

Typical application areas

Drillmec 7TS600 is widely used in drilling and workover all over the world due to its compact structure, reliable performance and flexible configuration:

Land Oil and gas drilling: as the main pump or standby pump, for deep wells to provide stable drilling fluid circulation.

Offshore drilling platforms: their compact design makes them ideal for jack-ups and fixed platforms, where space is precious.

Geothermal well drilling: capable of reliably pumping high-temperature, highly abrasive geothermal fluids.

Heavy-duty Workover: provides high-pressure power for operations such as killing and Flushing Wells.

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