Hydraulic lifting elevator
Technical Specifications – Hydraulic Lifting Elevator Parameters
The following tables provide key specifications for SJ Petro hydraulic lifting elevators. All units are designed and manufactured per API Spec 8C PSL‑2 and include 100% NDT of critical load‑carrying components. Custom configurations are available on request.
General Specifications (All Models)
| Parameter | Specification / Range |
|---|---|
| API standard | API Spec 8C (2025 latest edition) PSL‑2 |
| Proof testing | Hydraulic proof test at 1.5× rated working load per API 8C |
| NDT coverage | 100% MPI / UT on all critical load‑carrying components |
| Material | Forged high‑strength alloy steel, heat‑treated |
| Operating temp (standard) | -20°C to +50°C |
| Operating temp (Arctic) | -45°C to +50°C (special seals, fluids, impact‑tested steel) |
| Hydraulic pressure | 2,000–3,000 psi (14–21 MPa) |
| Control options | Manual hydraulic (remote pendant) / Machine‑electrical‑hydraulic integrated (CDZY) |
| Deflection range | Up to ±90° (CDZY models) |
CDZH (Side‑Door) Hydraulic Lifting Elevator
| Model | Pipe Range – Drill Pipe (in) | Casing (in) | Drill Collar (in) | Tubing (in) | Rated Load (tons) |
|---|---|---|---|---|---|
| CDZH‑350 | / | 9‑⅝″ – 20″ | / | / | 350 |
| CDZH‑500 | 3‑½″ – 6‑⅝″ | 4‑½″ – 9‑⅝″ | 4‑¾″ – 9‑¾″ | 2‑⅜″ – 4‑½″ | 500 |
DDZH (Center Latch) Hydraulic Lifting Elevator
| Model | Pipe Range – Drill Pipe (in) | Casing (in) | Drill Collar (in) | Tubing (in) | Rated Load (tons) |
|---|---|---|---|---|---|
| DDZH‑150 | 2‑⅜″ – 5″ | 4‑½″ – 5″ | 3‑⅛″ – 5‑¼″ | 2‑⅜″ – 4‑½″ | 150 |
| DDZH‑250 | 2‑⅜″ – 5″ | 4‑½″ – 5″ | 3‑⅛″ – 5‑¼″ | 2‑⅜″ – 4‑½″ | 250 |
| DDZH‑350 | 2‑⅜″ – 6‑⅝″ | 4‑½″ – 7″ | 3‑⅛″ – 6‑¾″ | 2‑⅜″ – 5‑½″ | 350 |
| DDZH‑500 | 2‑⅜″ – 6‑⅝″ | 4‑½″ – 7″ | 3‑½″ – 6‑¾″ | / | 500 |
CDZY (Machine‑Electrical‑Hydraulic Integrated) Fully Automated Elevator
| Model | Configuration | Rated Load (tons) | Control Features |
|---|---|---|---|
| CDZY‑250 | Machine‑electrical‑hydraulic integrated | 250 | Automatic opening/closing, turning (±90°), signal feedback |
| CDZY‑350 | Machine‑electrical‑hydraulic integrated | 350 | Automatic opening/closing, turning (±90°), signal feedback |
| CDZY‑500 | Machine‑electrical‑hydraulic integrated | 500 | Automatic opening/closing, turning (±90°), signal feedback |
Note: All CDZY models include signal feedback for interlock integration with rig control systems. Powered deflection (±90°) enables the elevator to swing from well center to V‑door under hydraulic power—no manual pushing or pulling required.
Product Types – Hydraulic Lifting Elevators from SJ Petro
1. CDZH Side‑Door Hydraulic Lifting Elevator
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Side‑opening design with double‑valve hydraulic circuit
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Interchangeable bushings for drill pipe, casing, drill collars, and tubing
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Remote hydraulic control from driller's station
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Load range: 350–500 tons
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Best for: Standard land drilling rigs, fast pipe handling, general drilling operations
2. DDZH Center Latch Hydraulic Lifting Elevator
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Split‑type body, 360° uniform load distribution
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Hydraulic control system for efficient, safe lifting
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Designed for tapered drill pipes, drill collars, casings, and oil pipes
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Load range: 150–500 tons
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Best for: Heavy‑duty drilling rigs, deep wells, applications requiring uniform load distribution
3. CDZY Machine‑Electrical‑Hydraulic Integrated Fully Automated Elevator
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Mechanical‑electrical‑hydraulic integrated control system
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Automatic opening, closing, turning (±90°), and signal feedback
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Self‑locking mechanism prevents accidental opening under load
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Designed for integration with rig automation systems (PROFINET / Modbus TCP / EtherNet‑IP)
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Load range: 250–500 tons
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Best for: Fully automated drill floors, remote operation campaigns, unmanned drill floor projects
4. Arctic‑Rated Hydraulic Lifting Elevators (All Models)
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Continuous operation at -45°C, storage to -60°C
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Low‑temperature hydraulic seals, special low‑pour‑point fluids, heated valve enclosures (CDZY)
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Impact‑tested steel (Charpy V‑notch at -46°C or lower)
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Best for: Siberian, Canadian Arctic, Alaskan drilling programs
5. Retrofit Hydraulic Lifting Elevator Kits
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Replace manual elevators with hydraulic control without replacing the entire hoisting system
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Includes hydraulic elevator body, control console, hoses, integration with existing traveling block
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On‑site installation available for SJ Petro and third‑party rigs following site survey
Application Fields – Where Hydraulic Lifting Elevators Deliver Maximum ROI
Land Drilling Rigs (ZJ Series)
Tripping drill pipe is the most frequent, repetitive, and safety‑critical operation on any drilling rig. Hydraulic lifting elevators eliminate manual latching and unlatching—the movements that cause most hand injuries on the drill floor. The driller commands the elevator from the cabin; the crew stays clear of the well center until the pipe is positioned. For ZJ40 through ZJ90 rigs, a 250–500 ton hydraulic elevator is standard equipment in automated drilling packages.
Workover and Well Servicing (XJ Series)
Workover rigs trip tubing repeatedly across multiple wells. Each trip involves hundreds of connections. Manual elevators at that frequency cause fatigue, repetitive stress injuries, and slowed tripping speeds. A hydraulic lifting elevator reduces the crew's physical workload by eliminating the need to swing and latch the elevator for every connection.
Offshore Platform Drilling
Space on an offshore platform is limited. Manual elevator operation requires crew members to work within inches of the well center. Hydraulic lifting elevators are remote‑controlled from the driller’s cabin, keeping personnel off the crowded platform deck during tripping. Marine‑grade finishes and corrosion‑resistant materials protect against saltwater exposure.
Arctic and Remote Land Drilling
In extreme cold, manual equipment becomes hazardous. Gloved hands cannot operate small latches. Standard hydraulic seals fail at -20°C. Our Arctic‑rated hydraulic lifting elevators are engineered for -45°C continuous operation with cold‑hardened seals, low‑temperature hydraulic fluids, and heated valve enclosures. These units have been field‑proven on Rosneft drilling campaigns in Siberia.
Automated Drill Floor and Remote Drilling Campaigns
Hydraulic lifting elevators are essential components of fully automated drill floors. Integrated with the rig's control system via Modbus TCP, PROFINET, or EtherNet‑IP, the elevator opens, closes, deflects, and signals its position—all without human intervention. For operators moving toward reduced‑crew or zero‑personnel drill floors, CDZY fully automated elevators are the standard.
Why Choose SJ Petro for Hydraulic Lifting Elevators?
Backed by Sinopec – One of China’s Top 500 Manufacturers
SJ PETROLEUM MACHINERY Co., Ltd. is a wholly‑owned subsidiary of Sinopec Oilfield Equipment Corporation, a China Critical Technological Equipment Nationalization Base and National Hi‑tech Enterprise. We are ranked No.2 among China Top 10 Petroleum Drilling and Production Equipment Manufacturers and rated AAA by China Petrochemical Industry and Banks.
We manufacture over 200 product models across four major categories and 12 series. Our hydraulic lifting elevators are designed specifically for our ZJ series drilling rigs and XJ series workover rigs—not generic products adapted to unknown platforms.
API 8C Fully Certified – Load Tested, NDT Verified, Traceable
All SJ Petro hydraulic lifting elevators are designed, manufactured, and tested according to API Spec 8C (latest edition) PSL‑2 requirements. We provide complete certification documentation: material test reports (MTRs), dimensional inspection records, NDT (MPI/UT) reports, and hydraulic test certificates with every shipment. Third‑party inspection (BV, SGS, DNV, ABS) is welcome at any stage of manufacturing.
Our elevators are 100% non‑destructively tested for critical parts and undergo hydraulic proof testing at 1.5× rated working load per API 8C requirements.
Integrated with SJ Petro Rig Control Systems – One Interface
Our hydraulic lifting elevators are designed to communicate directly with SJ Petro's PLC‑based control architecture—the same system that manages drawworks, top drive, mud pumps, and pipe handling automation. The driller controls the elevator from the same HMI used for the rest of the rig. No separate control box. No additional learning curve.
National‑Level Low‑Temperature Testing Laboratory – Arctic Proven
We operate one of China's few national‑level low‑temperature impact testing laboratories, qualifying materials down to -60°C. For Arctic‑rated hydraulic lifting elevators, we test every critical component—steel forgings, seals, hydraulic cylinders—to ensure reliable operation at -45°C. This same laboratory has validated materials for the 11 low‑temperature drilling rigs delivered to Rosneft.
Global Export Track Record – 30+ Countries
SJ Petro hydraulic lifting elevators are currently operating in over 30 countries, including Russia, Kazakhstan, the United States, Canada, the Middle East, and Southeast Asia. Our export team provides complete customs documentation and GOST certification packages for Russian and Eurasian markets.
Frequently Asked Questions (FAQ)
Q1: What is the difference between a hydraulic lifting elevator and a pneumatic elevator?
A: A hydraulic lifting elevator uses hydraulic oil (incompressible fluid) to actuate the opening, closing, and latching mechanisms. It delivers significantly higher force output—capable of producing more than 25 times the force of pneumatic systems—and holds torque and force at a constant level without continuous fluid flow. Hydraulic systems excel in power, precision, and load‑holding capability, making them the correct choice for heavy drilling loads.
A pneumatic elevator uses compressed air and must maintain operating pressure during use, making it less efficient and more costly to run for heavy loads. However, pneumatic elevators are generally faster, simpler to maintain, and more compact—making them a suitable choice for lighter loads and environments where space is limited.
Q2: Are SJ Petro hydraulic lifting elevators API 8C certified?
A: Yes. All SJ Petro hydraulic lifting elevators are designed, manufactured, and tested according to API Spec 8C (latest edition) PSL‑2 requirements. We can supply API monogrammed products and complete certification documentation including material test reports (MTRs), NDT reports, and hydraulic test certificates.
Q3: What pipe sizes can one hydraulic lifting elevator handle?
A: A single hydraulic lifting elevator body handles a wide range of tubulars through interchangeable latch bushings. Our CDZH‑500 model covers pipe sizes from 2‑⅜″ up to 9‑¾″ across drill pipe (3‑½″–6‑⅝″), casing (4‑½″–9‑⅝″), drill collars (4‑¾″–9‑¾″), and tubing (2‑⅜″–4‑½″). DDZH models cover drill pipe from 2‑⅜″ up to 6‑⅝″ across 150–500 ton capacity ranges.
Q4: What load capacities are available for SJ Petro hydraulic lifting elevators?
A: SJ Petro hydraulic lifting elevators are available in load capacities from 150 short tons up to 500 short tons depending on the model:
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DDZH series: 150, 250, 350, and 500 tons
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CDZH series: 350 and 500 tons
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CDZY series: 250, 350, and 500 tons with full machine‑electrical‑hydraulic integration
This range covers everything from XJ series workover rigs (150–250 tons) up to ZJ90 drilling rigs (500 tons). For load requirements above 500 tons or the 750–1500 ton range used in deep offshore drilling, contact our engineering team for custom configurations.
Q5: What is the difference between side‑door (CDZH) and center latch (DDZH) hydraulic lifting elevators?
A: Side‑door (CDZH) hydraulic elevators swing open from the side using a double‑valve hydraulic circuit structure. They are ideal for general drilling and workover operations where fast pipe handling is needed.
Center latch (DDZH) hydraulic elevators close at the center, providing 360° uniform load distribution around the pipe. They are preferred for heavy‑duty drilling and deep wells where load concentration could damage pipe connections or cause premature elevator wear.
Q6: Can the hydraulic lifting elevator swing to the V‑door without manual effort?
A: Yes. Our CDZY fully automated hydraulic lifting elevators feature power‑assisted deflection up to ±90°. The driller commands the elevator to swing from well center to the V‑door or pipe racking area at adjustable speed. No crew member needs to push or pull the elevator manually.
Q7: Do you offer Arctic‑rated hydraulic lifting elevators for extreme cold environments?
A: Yes. SJ Petro Arctic‑rated hydraulic lifting elevators are designed for continuous operation at -45°C with storage to -60°C. They include low‑temperature hydraulic seals, special low‑pour‑point hydraulic fluids, heated control valve enclosures (for CDZY models), and impact‑tested steel (Charpy V‑notch at -46°C or lower). These units are proven on Rosneft drilling campaigns in Siberia and qualified in our national‑level low‑temperature impact testing laboratory.
