SJ Petro ZJ40 Raising Cylinder

Core Purpose & Equipment Adaptation

This document is exclusively customized for the Raising Cylinder (Model: Z07120000001AA) specially designed for the SJ Petro ZJ40 Drilling Rig. It is tailored to meet the segmented needs of drilling engineering teams, maintenance technicians, procurement personnel, and equipment managers who are responsible for the operation, maintenance, and procurement of SJ Petro ZJ40 drilling rig lifting systems. As a core hydraulic execution component of the drilling rig, the raising cylinder is mainly used to provide stable lifting power for the drilling rig’s derrick, crown block, and other key lifting components, ensuring smooth, safe, and efficient completion of derrick raising, lowering, and position adjustment during drilling operations. This document provides comprehensive guidance on product functions, structural characteristics, applicable working conditions, maintenance, and procurement, helping users avoid equipment failure risks caused by improper use, maintenance, or mismatched parts, reduce maintenance costs, and ensure the continuous and stable operation of the drilling rig.

Product Introduction

The SJ Petro ZJ40 Raising Cylinder (Z07120000001AA) is a multi-stage telescopic hydraulic cylinder independently developed and matched for the SJ Petro ZJ40 drilling rig, complying with API 6A and GB/T 15242.1-2017 standards for hydraulic cylinders in petroleum drilling equipment. It adopts a three-stage telescopic structure (including first-stage plunger, second-stage plunger, and third-stage piston) to achieve long-stroke lifting with compact overall dimensions, which is perfectly adapted to the limited installation space of the SJ Petro ZJ40 drilling rig. The cylinder is made of high-strength alloy steel and precision-processed components, with excellent pressure resistance, wear resistance, and corrosion resistance, capable of withstanding the harsh working environment of petroleum drilling and long-term high-load operation. All matching components (including cylinder body, turnbuckle, copper sleeve, sealing rings, etc.) are specially customized to ensure perfect compatibility with the main cylinder, avoiding leakage, jamming, and other faults caused by mismatched parts.

Function Description

The core function of the SJ Petro ZJ40 Raising Cylinder (Z07120000001AA) is to convert hydraulic energy into mechanical energy, providing stable, controllable lifting and lowering power for the key components of the SJ Petro ZJ40 drilling rig. Specifically, its functions include: first, derrick raising and lowering: providing sufficient lifting force to smoothly raise the derrick from the horizontal position to the vertical working position, and safely lower it to the horizontal position during equipment shutdown or maintenance; second, position adjustment: realizing fine adjustment of the derrick’s height and position through stepless speed regulation, ensuring the derrick is vertical and stable, meeting the drilling operation requirements; third, load bearing and pressure maintaining: after the derrick is raised in place, it can stably bear the weight of the derrick and related components, and maintain the working pressure through the built-in check valve, preventing accidental lowering due to hydraulic oil leakage; fourth, shock absorption and buffering: the built-in guiding rings, wear rings, and sealing components can effectively absorb the vibration generated during drilling operations, reducing the impact on the cylinder body and related components, extending the service life of the equipment; fifth, fault self-protection: the air exhaust plug can discharge the air in the cylinder to avoid air resistance, jamming, and other faults during operation, ensuring the cylinder operates smoothly.

Structural Characteristics

The SJ Petro ZJ40 Raising Cylinder (Z07120000001AA) adopts a scientific and reasonable structural design, combining compactness, durability, and maintainability, with the following key structural characteristics: 1. Multi-stage telescopic structure: It adopts a three-stage telescopic design (first-stage plunger, second-stage plunger, third-stage piston), which effectively reduces the overall length of the cylinder when retracted, saving installation space, and can achieve a long lifting stroke when extended, meeting the derrick lifting requirements of the SJ Petro ZJ40 drilling rig; 2. High-strength cylinder body and plunger: The cylinder body (Z07120400002AA) and plungers are made of 45# high-strength alloy steel,经过 precision forging, heat treatment, and honing, with high surface finish and hardness, capable of withstanding high hydraulic pressure (rated pressure ≥ 25MPa) and long-term load-bearing; 3. Precision guiding and wear-resistant structure: Equipped with multiple guiding rings (P1100303AA, P1100305AA, etc.) and wear rings (P1100304AA), which can ensure the concentricity of the plunger/piston during telescopic movement, reduce friction between components, and avoid jamming and wear; 4. Reliable sealing system: Adopting V-type rings (P1100301AA, P1100302AA), O-rings (5300100043, 5300100170, etc.), dust rings (P1100323AA, P1100327AA), and other multi-layer sealing components, with excellent sealing performance, preventing hydraulic oil leakage and external dust, impurities from entering the cylinder, ensuring the cylinder operates stably; 5. Easy maintenance structure: The cylinder cover (P2300019AA), rod head (P1100297AA), and other components adopt bolted connection, which is easy to disassemble and assemble; the air exhaust plug (P1100332AA) and grease nipple (4314510070) are reasonably arranged, facilitating air exhaust, lubrication, and daily inspection; 6. Anti-corrosion and protective structure: The cylinder body surface is treated with anti-corrosion coating, and the matching guard (Z07120500001AA) can effectively protect the cylinder from collision, wear, and corrosion caused by drilling tools, debris, and harsh outdoor environments.

Applicable Working Conditions

The SJ Petro ZJ40 Raising Cylinder (Z07120000001AA) is specially designed for the working environment of the SJ Petro ZJ40 drilling rig, with strong environmental adaptability, and is applicable to the following working conditions: 1. Petroleum drilling sites: It is suitable for onshore petroleum drilling sites, including desert, grassland, mountain, and plain areas, capable of withstanding extreme temperature changes (-40℃ ~ +80℃); 2. High-load working conditions: It can stably bear the weight of the derrick and related components (rated load ≥ 500kN), and work continuously under high hydraulic pressure, meeting the long-term drilling operation requirements; 3. Harsh environmental conditions: It has excellent dustproof, waterproof, and corrosion-resistant performance, capable of working normally under conditions of sandstorm, rain, dew, and high humidity, avoiding faults caused by environmental factors; 4. Frequent start-stop working conditions: It can adapt to the frequent start-stop and telescopic movement during derrick adjustment and drilling operation, with stable performance and no jamming or leakage; 5. Mobile drilling conditions: It is perfectly adapted to the mobile working characteristics of the SJ Petro ZJ40 drilling rig, and can maintain stable performance during equipment transportation and site transfer, avoiding damage caused by vibration.

Maintenance and Maintenance Suggestions

To extend the service life of the SJ Petro ZJ40 Raising Cylinder (Z07120000001AA), reduce failure rate, and ensure safe and stable operation, the following maintenance and maintenance suggestions are proposed, which should be strictly implemented by maintenance technicians: 1. Daily inspection: Before each drilling operation, check the cylinder body surface for scratches, corrosion, and oil leakage; check the connection parts (bolt, pinshaft, turnbuckle) for looseness; check the air exhaust plug for air leakage; check the dust ring for damage and dust accumulation, and clean or replace it in time; 2. Regular lubrication: Inject lubricating grease into the grease nipple (M10X1) every 3 working days to ensure the lubrication of the guiding rings, wear rings, and copper sleeves, reducing friction; 3. Hydraulic oil maintenance: Use hydraulic oil that meets the standard (recommended No. 46 anti-wear hydraulic oil), and replace the hydraulic oil every 6 months; regularly check the hydraulic oil for contamination (impurities, moisture), and filter or replace it in time to avoid internal corrosion and wear of the cylinder; 4. Sealing component maintenance: Check the sealing rings (V-type ring, O-ring, dust ring) every 1 month for aging, cracking, and deformation, and replace them in time if any damage is found; when replacing, use the original matching sealing components to avoid leakage caused by mismatching; 5. Disassembly and maintenance: When the cylinder has faults such as jamming, severe leakage, and insufficient lifting force, disassemble it for inspection; pay attention to protecting the plunger and piston surface during disassembly, avoid scratches; clean the cylinder body, copper sleeve, and other components, and replace the worn parts (copper sleeve, guiding ring, wear ring) in time; 6. Storage maintenance: When the drilling rig is shut down for a long time (more than 1 month), retract the cylinder to the shortest position, apply anti-rust oil to the cylinder body and plunger surface, cover the guard, and store it in a dry, ventilated place to avoid corrosion; 7. Regular inspection of key components: Check the cylinder body, plunger, and piston for fatigue cracks every 12 months; check the check valve seat and steel ball for wear and leakage, and replace them in time if any damage is found.

On-site Fault Maintenance Cases

The following are 4 real on-site fault maintenance cases of the SJ Petro ZJ40 Raising Cylinder (Z07120000001AA), which can provide reference for maintenance technicians to quickly troubleshoot and solve faults:

Case 1: Cylinder Leakage Fault

Fault Phenomenon: During the derrick raising process of the SJ Petro ZJ40 drilling rig, hydraulic oil leakage was found at the connection between the cylinder cover and the cylinder body, and the lifting speed was significantly slowed down. Fault Cause: After inspection, the V-type ring (P1100301AA) at the cylinder cover was aged and cracked, and the press ring (P1100295AA) was loose, leading to poor sealing and oil leakage. Maintenance Method: Stop the equipment immediately, release the hydraulic pressure in the cylinder, disassemble the cylinder cover, replace the aged V-type ring with the original matching one (P1100301AA), tighten the press ring to the specified torque, and inject hydraulic oil to test the operation. Fault Elimination: After maintenance, the oil leakage fault was eliminated, and the cylinder lifting speed returned to normal, which could stably complete the derrick raising operation.

Case 2: Cylinder Jamming Fault

Fault Phenomenon: When the raising cylinder was extended, it was stuck and could not move smoothly, and abnormal noise was generated. After forced operation, the plunger surface was scratched. Fault Cause: After disassembly and inspection, the copper sleeve (P1200192AA) was severely worn, leading to the loss of guiding function of the plunger; at the same time, there was a lot of dust and impurities in the cylinder, which increased the friction between the plunger and the cylinder body. Maintenance Method: Replace the worn copper sleeve with the original matching one (P1200192AA), clean the cylinder body, plunger, and other components with clean hydraulic oil, install the guiding ring and wear ring again, inject lubricating grease into the grease nipple, and test the operation. Fault Elimination: The cylinder could extend and retract smoothly without jamming or abnormal noise, and the plunger surface was protected from further damage.

Case 3: Insufficient Lifting Force Fault

Fault Phenomenon: The raising cylinder could not raise the derrick to the specified position, and the lifting force was obviously insufficient, accompanied by slight oil leakage at the piston. Fault Cause: Inspection found that the check valve seat (P1100293AA) was worn, leading to poor pressure maintaining performance of the check valve; the O-ring (5300100528) on the third-stage piston was damaged, causing internal leakage of hydraulic oil, and the effective pressure in the cylinder was reduced. Maintenance Method: Replace the worn check valve seat (P1100293AA) and damaged O-ring (5300100528) with original parts, clean the check valve and piston, reassemble and test the pressure. Fault Elimination: The cylinder’s pressure maintaining performance was restored, the lifting force reached the rated value, and the derrick could be smoothly raised to the specified position without internal leakage.

Case 4: Plunger Damage Fault

Fault Phenomenon: After the drilling rig was transferred to the site, the raising cylinder was found to have abnormal vibration during operation, and the plunger surface had obvious scratches and corrosion. Fault Cause: During transportation, the guard (Z07120500001AA) was damaged, and the plunger was collided by debris; at the same time, the plunger surface was not coated with anti-rust oil during storage, leading to corrosion. Maintenance Method: Replace the damaged guard (Z07120500001AA), polish the scratches on the plunger surface with fine sandpaper, apply anti-rust oil, check the guiding ring and wear ring for wear, and replace them if necessary. Fault Elimination: The cylinder vibration was eliminated, the plunger corrosion was controlled, and the cylinder could operate stably for a long time.

FAQ (Frequently Asked Questions)

Procurement Guide

The SJ Petro ZJ40 Raising Cylinder (Z07120000001AA) and all its matching components are core parts that affect the safe and stable operation of the SJ Petro ZJ40 drilling rig. To ensure the operation efficiency of the drilling rig and avoid safety risks and economic losses caused by inferior parts, we recommend that you purchase products that meet the original factory standards. All products introduced in this document are made of high-quality materials, processed with precision, and fully comply with API 6A and GB/T 15242.1-2017 standards, with perfect compatibility with the SJ Petro ZJ40 drilling rig. Whether you need to purchase the whole raising cylinder, replace wearing parts (sealing rings, copper sleeves, guiding rings), or reserve spare parts for daily maintenance, we can provide comprehensive support and professional technical guidance. We strictly control the product quality, ensure that each product has passed strict pressure test and quality inspection before leaving the factory, and provide detailed product specifications and maintenance guidance. Please select the required products according to the part name and model, and contact us for procurement. We are committed to providing you with high-quality products, reasonable prices, and thoughtful services, helping you reduce maintenance costs, extend equipment service life, and ensure the continuous and efficient operation of your drilling rig.

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