Oil and Gas Drilling Rigs from in China

Sovonex International is able to provides a wide range of drilling rigs and drilling rig equipment. Our customers take advantage of high quality oil and gas drilling rigs at very competitive prices. We also attach great importance to after-sales service. Technical staff can be sent to the drilling site to assist in drill rig set up and operation at any time.

We specialize in the production of technically advanced 750hp to 3600hp, onshore and offshore drilling rigs (desert, mountain, marshland, shoal and other terrains), including mechanical well drilling rigs, electric drilling rigs and electromechanical drilling rigs as well as drill rig components such as masts, substructures, drawworks, crown blocks, traveling blocks, hooks, swivels, rotary tables and mud pumps.

We have been one of the first rig builders in China to introduce ship painting and assembly-line processing in rig manufacturing. We excel at developing module rigs, simultaneously lifted mast & and substructures, integral intelligent dog houses, single-shaft drawworks, DC dynamic digital control VF transmission systems as well as “tower type” cluster well drill floors used in offshore drilling. The dimensions of all parts of the drilling rig allow for easy railway and road transportation.

Quality System  and Control

• Strict compliance to the ISO 9001 quality system, HSE regulations, and the specifications of API 4F, 7K and 8A.
• Resistance to explosion, leakage, corrosion, high and low temperatures, freezing and sand blocking.
• All safety equipments come with a statement of conformity and quality certificate.
• A special quality team responsible for on-site quality control as well as inspection, supervision and production monitoring at component suppliers ensures superior quality and short delivery times.
• Every step in the manufacturing process of our rotary drilling rigs may be inspected by a third party inspection company on customers' demand.
• The general manufacturing process of the steel structure includes the following steps: Inspection of raw materials --> Removing rust using a shot blast --> Priming with corrosion-resistant resins --> High-precision cutting and welding using different methods such as SAW, SMAW, and FCAW --> Second blasting --> Final painting according to shipbuilding standards
• Painting details: After initial shot blasting, an epoxy zinc-rich base coating, intermediate coating and surface urethane coating are applied to all steel structures. This painting procedure has been adopted from shipbuilding to meet all requirements regarding resistance to corrosion, heat and humidity.
• Fluid and gas loop connections are reliably sealed and all ball valves are made from stainless steel.
• The electrical control system used in our drilling rigs has been designed and manufactured in cooperation with ABB and Siemens.
• Major components of the drill rigs adopt established NOV technology.

Drilling Rig Models

• AC / DC Drilling Rig (electric drilling rig)
• Electromechanical drilling rig
• Belt driven drilling rig
• Chain drive drilling rig

Drilling Rig Specifications

• The drill floor uses a box-on-box type structure, which is compact and easy to set up.  A large clearance enables easy installation of a blow out preventer (BOP).
• The intelligent driller house is fully equipped with real time displays of drill rig operation parameters, electrical system parameters, as well as failure alert and other alarm displays. The driller can focus on on the collection of data and optimization of drilling parameters in response to well condition, resulting in more safe, efficient and cost-effective drilling operations.
• K-type mast without the need of a pulling rope for assembly. Can be lifted as a whole.
• Our drilling rigs come equipped with a fully hydraulic and precisely controlled casing centralizer.
• All major parts of the drill rigs such as the crown block, traveling block, hook, hose, rotary table, mast, and substructure conform to API spec and are marked with the API monogram.

Drawworks

• All drawworks of our rotary drilling rigs are designed in a compact and light-weighted one-piece single shaft structure leading to higher transmission efficiency, reduced maintenance work and a hook hoisting speed of up to 1.3m/s at step-less speed regulation.
• The drawworks main brake is a hydraulic disc brake with a computer-controlled braking torque. The assistant brake is a dynamic Eddy current brake. The brake unit automatically detects electric voltage on side direct current and if a preset value is exceeded, extra energy is consumed on the brake resistor, thus easily controlling drilling speed.
• Equipped with an automatic bit-feeding device the drawworks use speed sensors controlled by vector control technique to realize constant WOB auto-bit-feeding as well as zero speed suspension. Bit load is even and bit-feeding is sensitive and accurate resulting in faster drilling speed. In case of a main system failure, the maximum drill string weight can be hoisted in an emergency response.
• A pneumatic tube clutch allows for quick and easy operation from remote positions.
• The drawworks drum is grooved and equipped with an assistant lifting device which raises the mast without help of the diesel engines. In case of a main drive failure where the power cannot be passed on to the drawworks, the lifting device can raise the drill string alone thus preventing down hole accidents.
•  Adopting a split installation above and below the drill floor with the heavy main drawworks being placed at the lower position resulting in extra stability.

Traveling block

• A sophisticated position control system effectively prevents collision accidents of the traveling block. Position control is achieved by automatic real time detection of the traveling block's position in combination with PLC analysis and calculation. If the traveling block reaches an alert position, a “soft-stop” control procedure is triggered automatically. In addition, accurate real time position indication of the traveling block facilitates operation by the driller.
• The bus control system is based on the industrial Profibus-DP to efficiently enable data exchange between the driller cabin, the auto-feeding system, the traveling block position control system and the VF speed regulation cabinet. Function parameters are retrieved from different units of the drilling rig and displayed on a user friendly touch screen interface thus optimizing control and operation.

Rotary table and mud pumps

• The rotary table is driven independently by AC or DC VF motors at 0-240 r/min stepless speed regulation thus eliminating power constraints between the rotary table and the mud pumps and raising drilling speed. The power is provided by an auxiliary generator set.
• The standpipe box and the rotary table level with the drill floor to make available an even larger operating space.
• Our well drilling rigs are equipped with heavy-duty triplex single action mud pumps with cardan shaft transmission.
• Rotary torque and mud pump pressure are digitally controlled for over-torque or overpressure protection.

Drilling Rig Models

The following specifications describe typical drilling rig models. All of these drill rigs are modular in design and can therefore be highly customized according to customers' demands. Please let us know the requirements at your drilling site and we will help you assemble the right rig for you.

Electric Drilling Rig

(⇑Overview)

• AC Drilling Rig: Single shaft AC variable frequency gear drive mode, AC motors drive the drawworks, rotary table and mud pump.
• DC Drilling Rig: AC-SRC-DC drive mode, DC motors drive the drawworks, rotary table and mud pump.

Electromechanical Drilling Rig

(⇑Overview)

Chain Drive Drilling Rig

(⇑Overview)

Belt Drive Drilling Rig

(⇑Overview)