API 89mm Downhole Mud Motor 7lz-89-6.8

• Customization: Available
• Warranty: 100 Drilling Hours
• Manufacturing Process: CNC Milling
• Model NO.: 7LZ-89-6.8
• Surface Treatment: Spray-Paint
• Operation Pressure: 3-10MPa
• Material: Alloy
• Transport Package: Steel Frame with Foam Shaft Sealing
• HS Code: 8431431000
• Production Capacity: 5000

Product Description

Product Description

Product Description

Our downhole mud motor is a high-performance Positive Displacement Motor (PDM) designed to deliver superior torque and consistent rotation to the drill bit in the most demanding drilling conditions. It converts hydraulic energy from drilling fluid into mechanical power, enabling efficient drilling through tough formations. Engineered with an emphasis on efficiency, durability, and reliability, this tool provides high torque output, a wide flow rate range, stable operation and long service life, ensuring you achieve deeper and faster penetration with minimal downtime.
 

Motor Specifications		Stator Specifications		Rotor Specifications
Model NO:	7LZ89-6.8	Overall length,mm (in)	2720 (107)	Overall length,mm (in)	2680 (106)
Tube OD,mm (in)	89 (3.504)	Rubber cut back,mm (in)	133 (5)	Eccentricity,mm (in)	2.94 (0.116)
Lobes	7/8	Tube OD,mm (in)	89 (3.504)	Major DIA,mm (in)	56.08 (2.208)
Stages	6.8	Tube OD,mm (in)	72 (2.835)	Tube material	42CrMo
Elastomer type	NBR	Material	42CrMo

*Altermate or custom thread forms are available.

Developed by a team with strong R&D capabilities, all major components of the mud motor (except industrial adhesives) are designed and manufactured in-house for maximum quality control. We are a professional manufacturer integrating research & development, design, and production, which means the entire tool - from power section to bearing assembly - is optimized as a cohesive system. This vertical integration gives us a competitive advantage in customizing the motor to client needs and continuously improving the design. We can readily modify or tailor our product line based on your requirements, offering custom sizes, power sections, or connection types as needed. This flexibility, combined with rigorous testing and material selection, translates to a mud motor that outperforms others in its class.
In summary, the 7LZ89-6.8 Mud Motor offers exceptional drilling efficiency and longevity. Its robust build and premium materials (high-strength alloy steels, advanced elastomers) ensure it withstands high pressures and abrasive fluids over extended use. Field results have shown reliable performance beyond 100 hours of continuous drilling under proper operating conditions, giving you confidence in tackling long horizontals and challenging directional wells. Our warranty period is within 8 months of purchase or within 100 drilling hours, whichever comes first. Choose this mud motor to reduce drilling time and maintenance costs while benefitting from our company's ongoing innovation and support.
 

Certifications

Certifications

We understand that quality and compliance are paramount in the drilling industry. Our downhole mud motors come with all the necessary certifications and documentation to meet international standards and client requirements:

• API Certification - Manufactured in accordance with API Spec 7-1 and API Q1 quality systems for drilling tools. (The motor design and threading meet API specifications to ensure compatibility and safety.)

  

• ISO Quality Certification - Certified to ISO 9001 Quality Management System standards, reflecting our commitment to consistent quality and continual improvement. (Environmental and Safety management certifications such as ISO 14001/ISO 45001 are also attained, underscoring our comprehensive compliance.)

      

 

• CNPC Approval - Registered as an approved supplier to China National Petroleum Corporation (CNPC) for drilling equipment. (This recognizes our product's quality in oilfield operations and allows use in CNPC projects.) 
• Third-Party Test Reports - Our mud motors are independently tested and verified. For instance, SGS inspection reports confirm material properties and performance specs. We provide any third-party quality or performance test reports upon request, ensuring transparency.
• Additional Certificates - National High-Tech Enterprise award and other industry honors (e.g. membership in the Chinese Society of Trenchless Technology) further certify our R&D strength and product excellence. All certifications and documents (like certificates of conformity, mill certificates) will be supplied with the product.

Technical Specifications

Technical Specifications
 
Below is a structured summary of key technical specifications for the 7LZ89-6.8 Downhole Mud Motor. Each parameter is critical for matching the motor to your drilling program:

Performance Specifications		Performance Details
Flow range,l/min (gal/min)	270 - 540 (71 to 143)	Maximum pressure diff,kPa (psi)	7024 (1019)
Flow rate,l/r (gal/rev)	1.24 (4.68)	Maximum torque,Nm (ft.lbf)	1139 (840)
Speed range,rpm	218 - 437	Stall pressure diff,kPa (psi)	10536 (1528)
Off-bottom pressure,kPa (psi)	1000 (145)	Stall torque,Nm (ft.lbf)	1709 (1261)
		Maximum power,kW (hp)	52 (70)

 

Application Scenarios

Application Scenarios

Our downhole mud motors are versatile and can be deployed across a range of drilling industries and scenarios. Below are the primary applications and industries where the tool excels (oil, gas, coal, and HDD are highlighted as key uses), as well as other fields where mud motors add value:

• Oil & Gas Drilling: Ideal for directional and horizontal drilling in oil and natural gas wells. Mud motors are extensively used in onshore and offshore drilling to increase the Rate of Penetration (ROP) in hard rock and to steer wells directionally. For example, our motors are widely utilized in oilfield directional drilling BHAs to drill curved and horizontal sections of wells. They deliver the torque and speed needed for PDC and rock bits, even in high-pressure, high-temperature wells, ensuring efficient drilling of reservoirs.

 

• Coal Mining & Methane Drainage: Used in drilling for coalbed methane (CBM) extraction and in coal mine degasification boreholes. Our mud motors support directional drilling in coal seams for gas drainage, exploration of gassier coal seams, and relief of pressure in mines. Chinese energy companies recognize our motors as reliable tools in coal-field drilling projects. The motors' durability and ability to handle debris-laden drilling fluid make them suitable for the abrasive conditions often encountered in coal geology. By enabling precise steering, they help intersect target coal seams and enhance gas recovery or mine safety.

 

• Horizontal Directional Drilling (HDD)/Trenchless: A primary choice for trenchless pipeline and utility installations under roads, rivers, and urban areas. In HDD rigs, a mud motor in the drill head significantly improves the ability to bore through hard rock or cobble layers without excavation. This motor is robust enough for HDD operations, providing stable rotation for the drill bit and allowing operators to steer the bore path accurately for long crossings. Its sealed bearing and power section design ensure reliable performance even with drilling fluid recycling systems typical in HDD. From river crossings to utility conduits, the mud motor increases the success rate of trenchless projects by overcoming geological challenges.

 

• Geothermal and Water Well Drilling: Applicable in high-temperature geothermal drilling and deep water-well drilling where rotary steerable systems might not be feasible. Mud motors have proven to be valuable in geothermal energy exploration, as they can operate in hot downhole environments and drill directional geothermal wells to tap steam reservoirs.

Our motor's elastomers and seals are rated for elevated temperatures, and a high-torque output helps drill through volcanic rock formations. In water well and geothermal projects, using a mud motor can shorten drilling time and enable controlled directional drilling (e.g., for intersecting multiple aquifers or heat zones from a single wellpad). These motors thus contribute to expanding renewable geothermal projects by facilitating complex well trajectories.
 

• Other Industries: The downhole mud motor's use is not limited to the above. It also finds uses in mineral exploration, geotechnical drilling, and tunneling operations where a reliable downhole rotation is required. Anywhere you need to drill through difficult strata - from exploring ore bodies with directional core drilling, to drilling drainage or relief wells - a mud motor can be a game-changer. Its ability to provide rotational energy downhole reduces stress on the drill string and surface equipment, enhancing safety and performance in various drilling contexts. (If your industry or project involves drilling, chances are a mud motor can improve it. Feel free to consult us on any specialized application.)

FAQ

FAQ

To assist our customers, we've compiled answers to common questions regarding the mud motor's operation, purchase, and support. If you have additional questions, please contact us - we are ready to help.

• Q: Does this product support customization?
  A: Yes. We offer full customization of the mud motor to meet your specific needs. Our engineering team can adjust the motor's specifications (length, power section, connection type, elastomer material, etc.) to suit different mud types, torque requirements, or well profiles. Essentially, we can modify the design for higher torque, different flow rates, higher temperature tolerance, or even special thread connections. With our in-house R&D and manufacturing, we accommodate custom orders efficiently. (All components except adhesives are made by us, giving us flexibility to implement custom features.) Before production, we will work with you to finalize the specifications and ensure the motor is optimized for your operational goals.

 

• Q: What payment terms do you accept?
  A: We accept a variety of international payment terms to facilitate smooth transactions. Common options include Telegraphic Transfer (T/T), Letter of Credit (L/C), as well as others like D/P or D/A. For example, we often work with a 30% T/T advance deposit and 70% balance before shipment, but we are open to negotiation based on order size and customer credit. We can also accommodate Western Union or other e-payment for smaller orders if needed. All payment terms will be clearly agreed upon in the contract and proforma invoice. Our goal is to provide flexible terms while ensuring security for both parties.

 

• Q: What shipping and customs documentation do you provide?
  A: We handle all logistics to ensure the product reaches you hassle-free. Each mud motor is packaged in a sturdy export crate or reinforced iron frame to protect it during transit. We provide a full set of shipping documents, including the Commercial Invoice, Packing List, and Bill of Lading (or Air Waybill) as standard. Additionally, we can supply a Certificate of Origin and any required customs clearance documents (e.g. CNPC approval letter, embassy certifications) if your country or project needs them. The product's HS code is 8431431000, which we will note in the invoice for smooth customs processing. We also include copies of all relevant certificates (API, ISO) and a factory inspection/test report with the shipment, so you have verification of quality for customs and your records. Our logistics team will keep you updated with tracking and assist with any shipping inquiries until you receive the motor.

 

• Q: What maintenance is required for the mud motor?
  A: Routine maintenance is very important to extend the mud motor's life. Under proper use, a mud motor can run for approximately 100 to 200 hours before needing routine maintenance (such as inspection and overhaul). We recommend inspecting the motor's power section and bearing assembly after each major job or when approaching ~150 hours of operation. Maintenance involves disassembling the motor to clean and check the rotor, stator, bearings, and seals, and replacing any worn parts (like the stator elastomer or bearings). We provide a Maintenance Manual with step-by-step guidelines for servicing the motor, as well as recommended spare parts to keep on hand. Our team is available to provide training or support - in fact, we can even assist in setting up a maintenance program or service station for your downhole motors if you have a fleet. By following the maintenance schedule and using clean drilling fluid, you'll ensure the motor consistently delivers peak performance over its service life.

 

• Q: What is the warranty on this product?
  A: We stand behind the quality of our mud motors. 7LZ89-6.8 Mud Motor comes with a comprehensive warranty that covers manufacturing defects and premature failures. Typically, we offer a 10-month warranty from the date of dispatch, which also equates to a certain number of operational hours (for example, net drilling of 100 hours within 10 months is guaranteed). This means if the motor fails due to a material or workmanship issue within the warranty period (under normal operating conditions and maintenance), we will provide free replacement parts or even a full unit replacement as necessary. In addition, we guarantee the stator rubber bonding and rotor hardfacing for a defined period and will support any legitimate claims promptly. We pride ourselves on after-sales service - even beyond the formal warranty, our technical support team will help troubleshoot issues, and we stock a full range of spare parts (power sections, bearings, seals, etc.) should you need them. Our goal is to ensure your drilling operations run smoothly with minimal interruption.