Our history began in 1921 with the Shanghai Xinmin Machinery Factory, and we have been manufacturing mechanical equipment for over 90 years. We started manufacturing equipment for the oil and gas industry in 1953 and since then, for more than half a century, we have continued to be at the forefront of this industry through the desire for innovation and courage of the spirit. We develop and grow together with the oil and gas industry and are the main force behind China’s oil and gas equipment industry.

Based on our knowledge and accumulated experience in drilling technology and oil and gas equipment manufacturing, we have fully focused on the research and development of these products. As a result of generations of effort, we have built a state-of-the-art dedicated production line as well as a highly efficient research platform for the development of new products. Step by step, we have formed eight main product groups: drill bits, hydraulic fracturing equipment, well casing, solids control, wellhead equipment, well drilling process control equipment, valve blocks and manifolds.

Since 1986, we have been regularly certified by the American Petroleum Institute (API). In 1996, we were certified by the Norwegian Bureau Veritas for compliance with the standards of the international quality management system ISO9001. Strictly adhering to the standards of the China National Accreditation Service CNAS, we manage all the processes of product development and production, guaranteeing its quality.

Acting in accordance with the principle of "Do everything to make the customer happy", we have focused on the needs of customers and continuously provide them with products and services of ever higher quality.

Having become a large corporation, Cavins, as before, tries to be closer to consumers. It studies the needs of industry representatives, offers original engineering solutions, taking into account modern realities.

Branded products are exported to many oil-producing countries and have earned the recognition of oilmen around the world. In Russia, devices manufactured under a well-known brand are widely used, which show excellent results in practice. At the fields beyond the Arctic Circle and in the southern regions, they work stably, regardless of natural and climatic conditions.

It is worth taking a closer look at the main lines of branded products and understanding why American equipment is so popular with foreign oilmen.

• cutting: To improve wear resistance, the surface of the steel teeth of the drill bit is coated with a new type of wear-resistant alloy. To improve the mechanical properties of the insert teeth of the drill bit, a new composition of hard alloy and new tooth manufacturing technologies are used;

• reinforcement of the gauge ring: milled teeth (GT) are installed on the outer part of the cone, carbide teeth are on the peripheral crown and back of the share, the peak of the share and the front part of the surfacing are made of wear-resistant alloy, which greatly increases the degree of reinforcement of the gauge ring;

• bearings: precision bearings with sealed steel balls. The trunnions are welded with a special alloy, and the inner hole of the cutter is welded with a wear-resistant alloy and heavily silver-plated to increase wear resistance, improve anti-seize properties and adapt to high speeds;

• sealing and lubrication: during drilling operations, the surfaces of the metal seals move relative to each other, and there is an energy supply ring inside to increase the reliability and service life of the bearing seal. Lubrication compensation system to limit pressure drop and specialized high performance grease improve bearing lubrication reliability;

• product scope: used in downhole power drilling rigs and high-speed rotary drilling rigs.

• cutting: to improve the basic mechanical properties of the cutting teeth, a new composition of hard alloy and new technologies for manufacturing drill bit teeth are used;

• reinforcement of the gauge ring: hard-alloy teeth on the peripheral crown of the cone and the back of the paw, reinforcement of the peak of the paw and the front part of the surfacing contribute to the strengthening of the gauge crown;

• Bearings: Two types of designs are used — air-cooled bearings and sealed lubricated bearings. Roller cutter with sealed steel balls, optimization of the paw design and the landing gap between the cutter and steel balls allow minimizing the occurrence of an emergency and the fall of the cutter into the well;

• product scope: suitable for mining work in mines.

2: Product series

• China-made diamond carbide inserts (A)
• Imported diamond carbide inserts (B)
• Combined diamond-tungsten carbide inserts (H)

3: Drill bit body material

• Drill bit with matrix body (M)
• Drill bit with steel body (S)

4: Number of blades: 3−10

5: Diameter of diamond carbide inserts in the main cutting zone (19 ø 19 mm; 16 ø 16 mm; 13 ø 13 mm; 10 ø 10 mm; 08 ø 8 mm)

6: Features:

• Directional Hole Drill Bit (D)
• Drill bit with double row of teeth (S)
• Drill bit with gauge reinforcement (E)
• Drill bit with special tooth arrangement (T)
• Drill bit with cutting elements of various shapes (G)
• Drill bit with special shapes (Y)
• Worm bit (L)
• Drill bit with straight blades (Z)

1: Product series

• Core core drill bit (C)

2: Drill bit body material

• Drill bit with matrix body (M)
• Drill bit with steel body (S)

3: Number of blades: 5−12

4: Parameters of diamond carbide inserts in the cutting zone (19 ø 19 mm; 16 ø 16 mm; 13 ø 13 mm; 10 ø 10 mm; 08 ø 8 mm)

5: Features:

• Drill bit for directional well (D)
• Drill bit with cutting elements of various shapes (G)
• Drill bit with special shapes (Y)

• обладает преимуществом в резании при бурении разнородных или твердых грунтов;

• has an advantage in cutting when drilling heterogeneous or hard soils;
• improved drilling dynamics and directional control, reduced drilling torque and vibration damping;
• high aggressiveness of the combined bit helps to meet the conditions of rock destruction, thereby ensuring drilling stability;
• reduced requirements for axial vibration and load on the drill bit allows you to achieve higher drilling speed;
• compared to PDC bits, they are more suitable for working in horizontal directional and directional drilling conditions.

Technical features:

• when there is no drilling tool in the well, the blind ram can be closed to completely seal the dry wellbore;
• when a drilling tool or any pipes are in the well, it is possible to seal the annulus between the casing string and the drilling tool. Shear rams can also be installed to shear the drill string in order to completely seal the wellhead; 13 5/8" series shear rams are capable of shearing a 5" S135 high-strength drill string, while the shear rams are resistant to sulfur and its compounds;
• When a well is shut in, special operations such as mud circulation, open flow throttling and well killing can be performed by connecting a manifold to the outlet flange on the side of the body;
• in exceptional cases it is possible to suspend part of the drill string.

Technical features:

• when there is no drilling tool in the well, it is possible to completely seal the borehole of an unproductive well;
• when a drilling tool (or any pipes) is in the well, it is possible to seal the annular space of any size;
• if an accidental release occurs during drilling, coring, logging or other operations, it is possible to seal the annular space formed between the shaft and the square drill rod, core drill, electric cables and steel cables;
• By using a pressure reducing valve and a buffer accumulator, the drilling tool can be smoothly lowered through the 18" blowout preventer sealing connection.

Technical features:

• improves well control safety: due to the design in the form of a one-piece body and the absence of prefabricated connections, the number of leakage zones at the joints is reduced;
• contributes to an increase in drilling speed: installation of only one device is required, which reduces the installation cycle, reduces labor costs and saves time on equipment installation;
• reduces the cost of drilling: maneuverability during installation, dismantling, as well as during transportation of the block can significantly reduce the time of work and their labor intensity.

Technical features:

• manifold module
• The drilling fluid circulation system consists of four major units: the derrick riser, the drilling site gate valve assembly, the surface pipeline and the surface gate valve. Thanks to this modular principle, labor productivity increases during the installation and dismantling of equipment and reduces the time for these works. The gate valve control unit uses a new type of sand-proof gate valve with flexible opening and closing and low force torque, which solves the problem of gate valve failure due to clogging with sand and other foreign matter;
• The pressure parts are forged from high-strength alloy steel, and the welds are made by automatic pressure welding, which improves the compressive strength and service life of the product.

• Contamination of the drilling fluid in the wellbore with formation fluids can lead to an imbalance in the pressure of the clean drilling fluid column and formation pressure, resulting in overflows and accidental blowouts. With the BOP closed, back pressure can be controlled by maintaining a certain BHP by opening or closing the throttle valve. This allows the contaminated drilling fluid to be circulated and removed or pumped into a dead well with the drilling fluid pressure adjusted.

Technical features:

• used to control the occurrence of overflows, emergency blowouts and pressure regulation in oil and gas wells;
• when using a blind ram for sealing the wellhead, the well is killed by injecting heavy clay drilling fluid through the well killing block into the wellbore;
• if an emergency release has already occurred, then clean water is supplied through the well killing unit to the wellhead to prevent ignition and fire;
• if a fire occurs as a result of an emergency release, a fire extinguishing agent is supplied through the well killing unit to extinguish the fire.

Technical features:

• The GX/S series double path vibrating screen allows you to use linear and elliptical vibrations, as well as quickly switch between them. Sand formation drilling uses linear oscillation to improve processing performance, while peat drilling uses elliptical oscillation to minimize mud loss, solve mud screen problems, and meet the demands of complex drilling operations. The manufacturer is ready to design and supply double and triple sieves;
• high number of "Mesh" sieves, long service life;
• the use of a quick-acting wedge clamping device makes it easy and quick to change the sieve;
• stainless steel mechanical lifting device is durable and easy to operate;
• The drilling mud protection device is made of stainless steel and effectively protects against splashes, allowing one operator to operate the equipment;
• high quality rubber springs, good shock absorption, low noise, long service life, convenient and easy to replace;
• explosion-proof, stainless steel cable glands;
• removable parts are universal and must be replaced;
• the engine is equipped with protection systems against thermal overload, overcurrent, voltage drop, as well as an explosion protection system;
• the rear-mounted electrical control box has its own splash guard.

Technical features:

• ultra-high-hole separator (Mesh), combining the functions of vibrating screen, sand separator and desilter, features compact structure, high processing efficiency and high safety factor;
• cyclone with high resistance to abrasion, adhesion, scratching, wear and corrosion is light in weight;
• the inlet of the cyclone can autonomously open according to different processing volumes, which facilitates the operation, maintenance and replacement of the cyclone;
• each of the two parts of the sand separator can be replaced separately. The replacement of a worn desilter cyclone can be carried out with the machine running by closing the ball valve.

Technical features:

• the use of the LW450−1200D centrifuge in conjunction with the VCD-30 vertical dryer ensures high efficiency and productivity of drilling cuttings processing;
• high degree of cuttings cleanup meets the requirements of the relevant state or industry emission standards, which require a content of 5% oil in oil-based drilling mud cuttings;
• the system has a high degree of automation, due to which the automatic supply of raw sludge and automated pressing of dry sludge is realized, which greatly facilitates manual labor and reduces the labor intensity of the process. Using the system ensures clean production at the drilling site and processing of drilling cuttings without unloading them.

Technical features:

• centrifuge drum and screw conveyor are made of highly corrosion resistant material, which increases their service life;
• the screw conveyor and the drum assembly are independently tested for dynamic and static balancing, which ensures stable operation and increases the service life of the bearings;
• the ability to remove ultra-fine and extremely hazardous particles from the drilling fluid allows for functions such as drilling fluid viscosity control, barite regeneration, etc.;
• The speed of the main and auxiliary motors of the high speed centrifuge is continuously adjustable. The rotation speed of the drum and screw conveyor can be adjusted from 0−3200rpm to achieve a separation factor of 0−2035, which meets the requirements of various working conditions.

Technical features:

• flexible combination of slips allows the system to be adapted to different casing sizes;
• security locks prevent the occurrence of unforeseen situations;
• Structurally, the grippers are made with fine notches, which minimizes damage to the casing strings;
• the system allows to realize the functions of torque transmission and circulation under high pressure of the cement slurry;
• the modular design allows quick assembly and dismantling of individual units, which simplifies and facilitates maintenance.

Technical features:

• the mechanism for the forced removal of sticking of the blades allows the forced return of the blades;
• after reaming the wellbore, the pilot bit may still drill normally or be pulled out of the wellbore after a full circulation cycle;
• optimized blade design improves wear resistance, efficiency and reaming quality.

Technical features:

• product characteristics reach PR2 class and HH material class. The product features high reliability and corrosion resistance to H2S compounds, and is suitable for oil and gas wells in high temperature, high pressure and high sulfur environment;
• With rational structural design and material selection, as well as advanced internal channel welding technology, the product meets the requirements of oil and gas field exploitation and is a high value-added wellhead equipment manufactured in China.

Technical features:

• combines the functions of acid fracturing and oil (gas) production in one device, meeting the requirements of working under conditions of high pressure, large productivity, strong scouring effects and high corrosion;
• suitable for multi-stage hydraulic fracturing;
• the new design of the device prevents shearing of the tubing string hangers and sealing parts of the screw expander;
• The butterfly valve stem is wedge-shaped, which increases the service life of the throttle valve.

Technical features:

• monoblock design: use of a casing string head and tubing heads in one block, the body is equipped with conductor and technical casing string hangers, tubing string hangers and pressure testing stages;
• Installed once: Operations such as well drilling, oil flow testing and well completion can be completed without changing wellhead equipment or changing surface equipment;
• reduced operating procedures: no equipment changes are required during operations, thus reducing the time for reinstallation and pressure testing of wellheads, blowout preventers and choke and kill blocks, for raising and lowering a drilling tool or tubing string. The device allows you to save time and money, reduces the risks that arise when performing multiple changes.

Technical features:

• the mixing tank capacity is increased by about 20% compared to similar products, the cementing work time is increased, the mixing quality is improved;
• The vehicle is equipped with STW’s proprietary system for automatically controlling the mixing of two different volumes of solution, with stable mixing density and high response speed. However, the device supports remote loading and unloading of several parameters;
• the controller of the automatic solution mixing control system is mounted in a compact and robust housing with high stability and reliability.

• fully digital control system with PLC interface;
• total height up to 4 m, suitable for work in mountainous and hilly areas;
• dual fuel system using diesel and natural gas.

• overall length ＜13m, width 2.5m, height ≤ 4m, small turning radius, suitable for difficult road conditions such as hilly and mountainous areas;
• performance is 30% higher than similar devices when working with the same gear;
• Structural elements such as a car subframe, radiator bracket, etc. have been optimized in order to achieve weight reduction while maintaining the performance of these elements;
• the correct use of safety valves and pressure filters of the hydraulic system increases the safety and reliability of the system;
• installing a lubrication pump near the lubricating oil tank improves the lubrication efficiency of the fracturing pump drive end;
• the use of a 600 mm wide sliding type repair platform with a three-sided protective barrier facilitates access for inspection and repair of the pump head and increases the safety of work.

• the output volume of clean water can reach 130 barrels / min (20.6 cubic meters / min);
• can be used to add liquid and dry additives;
• the device is equipped with four hydraulic pumps, which can be connected, on either side, from the inlet;
• automatic control and data transfer is carried out using the installed software;
• two independent and mutually redundant sand mixing systems;
• additional installation of a unit for supplying fibrous additives is possible.

• suitable for fracturing fluid mixing operations with volumes below 100 barrels (16 cubic meters of pure water);
• can be used for adding liquid and dry additives, in liquid addition systems with a total coverage of 3 l/min ~ 430 l/min;
• platform network control and remote control by PLC;
• the mixer itself and the piping system are completely made of stainless steel.

• comfortable working conditions: salon-type design, equipment with an air conditioning and temperature control system, there is a drinking water machine;
• two monitoring systems — main and auxiliary. The main system displays data from all controlled hydraulic fracturing units and wellheads. The auxiliary system can also safely display the data of the main system, and can be switched to in case of abnormalities in the operation of the main monitoring system. All hydraulic fracturing data can be backed up, exported and printed;
• the device is equipped with two power supply systems — an industrial power supply and an uninterruptible power supply (UPS). Industrial AC power supply supports indoor lighting and control system. The UPS provides temporary power during a power outage.

• pipe fittings are processed according to an optimized technology in such a way that the inner layer of the pipeline is subjected to a preliminary compressive stress, thereby effectively preventing the expansion of fatigue cracks;
• pipeline fittings have a large diameter, which reduces the mass of the manifold and makes the device suitable for work with large volumes;
• Manifold tee and T-piece are made by continuous forging technology, which increased their strength and service life;
• the inner surface of the manifold tee and the T-piece have been shot blasted by improved technologies, which increased the metal fatigue safety factor and service life;
• the movable knee joint has an optimized stepped raceway structure, which significantly increases the wall thickness and rotational maneuverability;
• The cone valve uses an optimized design of a bi-directional sealing of the valve core, due to which the load on the sealing arches is equalized, and the moment of force is reduced;
• the hydraulic fracturing manifold is assembled into a ring with 8 suction holes, which made it possible to reduce its dimensions, making it convenient for transportation and speeding up all operations.