专利证书_Tonghua petroleum and chemical machinery manufacturing co., LTD

In order to adapt to complicated terrain condition well service, our company develops a category of workover rig that can service without guylines. The rig incorporates a supporting system to replace the traditional guyline. Thus, it can save the time and space of guyline fixing and removing and improve the service efficiency. The no-guyline rig is best for oil well in regions with complex terrain conditions, e.g urban city area, desert, marsh etc.

No-guyline Workover Rig Series

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In order to adapt to complicated terrain condition well service, our company develops a category of workover rig that can service without guylines. The rig incorporates a supporting system to replace the traditional guyline. Thus, it can save the time and space of guyline fixing and removing and improve the service efficiency. The no-guyline rig is best for oil well in regions with complex terrain conditions, e.g urban city area, desert, marsh etc.

Swabbing & Service Unit

Swabbing & Service Rig is the up to date multifunctional oil field equipment that integrates the functions of well servicing rig, swabbing unit and mast transportation truck. This is another innovation of THpetro’s oil field machineries that can handle different operations with one piece of equipment, thus saving the time and reducing the cost.

Swabbing & Service Unit

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Swabbing & Service Rig is the up to date multifunctional oil field equipment that integrates the functions of well servicing rig, swabbing unit and mast transportation truck. This is another innovation of THpetro’s oil field machineries that can handle different operations with one piece of equipment, thus saving the time and reducing the cost.

Flushy Unit

Flushby unit is THpetro according to the needs of oil field work, independent research and development of a new type of special service rig, it is mainly used for screw pump type sand washing operation of viscous crude oil Wells, single rig can complete the traditional by the pump truck and crane synergy of screw pump wells well washing work, realize one rig can can not only improve the efficiency, and reduced the other auxiliary equipment, reducing the operation cost. The unit is exported in bulk to the Middle East, Eastern Europe and South America.

Flushy Unit

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Flushby unit is THpetro according to the needs of oil field work, independent research and development of a new type of special service rig, it is mainly used for screw pump type sand washing operation of viscous crude oil Wells, single rig can complete the traditional by the pump truck and crane synergy of screw pump wells well washing work, realize one rig can can not only improve the efficiency, and reduced the other auxiliary equipment, reducing the operation cost. The unit is exported in bulk to the Middle East, Eastern Europe and South America.

Well Washing & Workover Rig

Well washing and workover rig is a special equipment for oil field that integrates well washing and workover functions. It is mainly composed of chassis, transfer case, hydraulic torque converter, triplex pump, forward and reverse gear reducer, winch, mast, traveling hook block, hydraulic system, gas system, electrical system, etc. The engine is equipped with a full speed governor, and the power of the engine is transmitted to the transfer case through the drive shaft. The transfer case transmits power to the rear axle, reverse gear reducer and triplex pump respectively, to achieve chassis walking, workover operations and well cleaning operations. The transfer case also drives the hydraulic pump to supply oil to the hydraulic system.

Well Washing & Workover Rig

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Well washing and workover rig is a special equipment for oil field that integrates well washing and workover functions. It is mainly composed of chassis, transfer case, hydraulic torque converter, triplex pump, forward and reverse gear reducer, winch, mast, traveling hook block, hydraulic system, gas system, electrical system, etc. The engine is equipped with a full speed governor, and the power of the engine is transmitted to the transfer case through the drive shaft. The transfer case transmits power to the rear axle, reverse gear reducer and triplex pump respectively, to achieve chassis walking, workover operations and well cleaning operations. The transfer case also drives the hydraulic pump to supply oil to the hydraulic system.

XJ250（40T）Workover & Drilling Rig

XJ250(40T) drilling and workover rig is a special equipment for oil field. The drive type of chassis can be 8×8, 8×6 or 6×6. The power unit adopts Carter diesel engine and Allison transmission, and the winch adopts double drum structure. The mast is a rectangular tubular door shaped double section set structure, 21m or 31m height, equipped with a portable table, optional sucker rod basket, rotary table, drilling floor, swivel and other components to complete drilling operations.

XJ250（40T）Workover & Drilling Rig

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XJ250(40T) drilling and workover rig is a special equipment for oil field. The drive type of chassis can be 8×8, 8×6 or 6×6. The power unit adopts Carter diesel engine and Allison transmission, and the winch adopts double drum structure. The mast is a rectangular tubular door shaped double section set structure, 21m or 31m height, equipped with a portable table, optional sucker rod basket, rotary table, drilling floor, swivel and other components to complete drilling operations.

XJ350（60T）Workover & Drilling Rig

XJ350(60T) workover rig is suitable for service work of φ 73mm(EUE) of 4000m well depth, φ 73mm drill pipe of 3200m, φ 88.9mm drill pipe of 2500m well depth. According to the loading chassis, XJ350(60T) workover rig can be divided into special chassis and normal chassis. The drum can be divided into single drum and double drum. The air-controlled disc brake can be used for the drawworks auxiliary brake. XJ900(60T) workover rig is the representative product of our company's batch export to the American market.

XJ350（60T）Workover & Drilling Rig

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XJ350(60T) workover rig is suitable for service work of φ 73mm(EUE) of 4000m well depth, φ 73mm drill pipe of 3200m, φ 88.9mm drill pipe of 2500m well depth. According to the loading chassis, XJ350(60T) workover rig can be divided into special chassis and normal chassis. The drum can be divided into single drum and double drum. The air-controlled disc brake can be used for the drawworks auxiliary brake. XJ900(60T) workover rig is the representative product of our company's batch export to the American market.

XJ450（80T）Low Temperature Workover & Drilling Rig

It adapts low temperature materials, it can do workover operation in the low temperature of minus 45 degrees, and it has good cold and wind resistance.

XJ450（80T）Low Temperature Workover & Drilling Rig

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It adapts low temperature materials, it can do workover operation in the low temperature of minus 45 degrees, and it has good cold and wind resistance.

XJ450（80T）Workover & Drilling Rig

XJ450 (80T) drilling and workover rig is a special equipment for drilling and repairing Wells in oil field. The chassis adopts 10×8 drive type, the power unit adopts Carter diesel engine and Allison transmission, and the winch adopts double drum structure. The hook Max load is 1125kN.The mast is a rectangular tubular gate double section set structure, with a height of 31.7m and with working platform. It equipped with rotary table, drilling platform, swivel and other drilling components, can independently complete drilling operations.

XJ450（80T）Workover & Drilling Rig

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XJ450 (80T) drilling and workover rig is a special equipment for drilling and repairing Wells in oil field. The chassis adopts 10×8 drive type, the power unit adopts Carter diesel engine and Allison transmission, and the winch adopts double drum structure. The hook Max load is 1125kN.The mast is a rectangular tubular gate double section set structure, with a height of 31.7m and with working platform. It equipped with rotary table, drilling platform, swivel and other drilling components, can independently complete drilling operations.

XJ550（100T）Workover & Drilling Rig

XJ550(100T)Workover rigs workover depth up to 5,800m and service depth up to 7000m. Equipped with rotary table, swivel and drilling tools, they can perform as a mobile drilling rig up to 1,500m depth. The main rig can be customized with well control, solid control and other systematic setup to become your compete solution to workover and drilling operations.

XJ550（100T）Workover & Drilling Rig

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XJ550(100T)Workover rigs workover depth up to 5,800m and service depth up to 7000m. Equipped with rotary table, swivel and drilling tools, they can perform as a mobile drilling rig up to 1,500m depth. The main rig can be customized with well control, solid control and other systematic setup to become your compete solution to workover and drilling operations.

XJ750（150T）Workover & Drilling Rig

XJ750(150T) workover rig adopts double Caterpillar C15 engines with Allison transmissions. It is the best-selling mobile drilling rig for both oil drilling and workover purposes. It can reach up to 3,000m drilling depth and 8,000m workover depth, with 1,700kN max hook load. XJ750 rig is the ideal choice for heavy duty workover and mobile drilling operation.

XJ750（150T）Workover & Drilling Rig

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XJ750(150T) workover rig adopts double Caterpillar C15 engines with Allison transmissions. It is the best-selling mobile drilling rig for both oil drilling and workover purposes. It can reach up to 3,000m drilling depth and 8,000m workover depth, with 1,700kN max hook load. XJ750 rig is the ideal choice for heavy duty workover and mobile drilling operation.

Turntable

The turntable is one of the main components of oil drilling equipment. It uses power to rotate to complete three major functions: 　　 1. Rotate the downhole drilling tool to transmit a large enough torque and necessary speed; 　　2. In the process of casing running or tripping, all casing strings or drill pipes supporting the downhole can bear the weight; 　　3. Complete drill bit unloading and shackle, and carry out ancillary work such as undercut and buckle when handling accidents.

Turntable

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The turntable is one of the main components of oil drilling equipment. It uses power to rotate to complete three major functions: 　　 1. Rotate the downhole drilling tool to transmit a large enough torque and necessary speed; 　　2. In the process of casing running or tripping, all casing strings or drill pipes supporting the downhole can bear the weight; 　　3. Complete drill bit unloading and shackle, and carry out ancillary work such as undercut and buckle when handling accidents.

Faucet

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Faucet

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Working machine with pressure

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Working machine with pressure

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Washing fluid treatment vehicle

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Washing fluid treatment vehicle

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Cement Truck Series

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Cement Truck Series

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Oilfield support vehicle series

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

Oilfield support vehicle series

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car. Sanitation vehicles, engineering vehicles, vans; once the oil leakage occurs, the internal lubricating oil of special vehicles will decrease, which will lead to poor lubrication of parts and poor cooling of parts, resulting in damage to parts, affecting the service life of the vehicle, and even leaving accidents Hidden dangers. 　　 1. The common causes of oil leakage in general vehicles are as follows: 　　1. Special vehicle parts quality problems, parts raw materials or manufacturing process problems; 　　2. Improper high-speed assembly, unclean mating surfaces, damaged gaskets, displacement or failure to install in accordance with operating regulations. 　　3. Uneven tightening force of the tightening nut, broken wire or loose and falling off, etc. lead to work failure. 　　4. After long-term use, the sealing material wears out excessively, deteriorates due to aging, and becomes invalid due to deformation. 　　 5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added. 　　6. Parts (side covers, thin-walled parts) on the joint surface are flexed and deformed, the shell is damaged, and the lubricating oil seeps out. 　　7. After the vent plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the case, oil leakage will often occur at the weak seal.

XJ650（120T）Workover & Drilling Rig

XJ650 Rig is the bestselling heavy duty workover rig of THpetro. Equipped with powerful CAT C18 engine, the XJ650 can serve as a 2 in 1 rig to perform both workover and drilling operation. THpetro XJ650 rig is renowned by the powerful capability, stable performance and great mobility by users in South America, Western Africa and Middle East area.

XJ650（120T）Workover & Drilling Rig

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XJ650 Rig is the bestselling heavy duty workover rig of THpetro. Equipped with powerful CAT C18 engine, the XJ650 can serve as a 2 in 1 rig to perform both workover and drilling operation. THpetro XJ650 rig is renowned by the powerful capability, stable performance and great mobility by users in South America, Western Africa and Middle East area.

30 tons of workover rig

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car.

30 tons of workover rig

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car.

Workover rig

Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car.

Workover rig

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Various special vehicles often have oil leakage failures in the use of vehicles. Oil leakage failures will directly affect the use and productivity of the car, resulting in the waste of lubricating oil and fuel, the power and work efficiency of the car.

Products

Oil workover equipment 

No-guyline Workover Rig Series

Truck Mounted Drilling & Workover Rig Series

Multi-functional Workover Rig Series 

Well Washing & Workover Rig

Flushby Unit

Swabbing & Service Unit

Normal Workover Rig Series 

No-guyline Workover Rig

XJ150 (30T) Workover Rig

XJ250 (40T) Workover Rig

50T Workover Rig

XJ350 (60T) Workover Rig

Oilfield special vehicles 

Well Washing Unit Series

Swabbing Unit Series

Oil Recovery Truck Series

Flushing & Dewaxing Truck Series

Cementing Truck Series

Oil Field Support Truck Series

Oilfield environmental protection equipment 

Sand Flushing Liquid Treatment Unit

Flushing Fluid Truck

Workover rig accessories 

Traveling Hook Block

Rotary Table

Swivel

专利证书

Tonghua Petro-chemical Machinery Manufacture Co., LTD.,