power tong operator made in china

The tong should be secured for both make-up or break-out operation, by utilizing the snub line. If this is not done, the tong may be thrown against operator causing physical harm.

When using the mechanical shift lever to change speeds, the power tong must first come to a complete stop before shifting. When using tongs hydraulic shift two-speed motor to change speeds, the tong may be shifted "On the Run."

Eckel tongs have proven to basically to last forever with minimal maintenance as all they are manufactured with the highest quality of steel. Using Eckel equipment tells your customer that you have the highest quality equipment on the market.

Tong size is determined by range of tubulars you will run. For example a 5-1/2 Hydra-Shift® is capable of running tubulars 5-1/2-inches and smaller while the 14 UHT is capable of running tubulars 14-inches and smaller. It is important not to use a large range of sizes with just one tong. If you have a 10-3/4 Standard and you regularly run 4-1/2-inch tubing with this tong, you might consider using a smaller tong.

PSI pressure determines the maximum torque the tong will safely be able to reach. Eckel rates all their tongs at the industry standard 2500 PSI. A competitor with a similar size tong may show more or the same torque as an Eckel tong due to a higher PSI from the power unit (which is in fine print) in an effort to fool you, thinking there tong is equal to the industry standard (Eckel tong.)

Gallons Per Minute determines the rotational speed of the tong. A low GPM will cause the tong to operate at a lower speed while a high GPM will result in the tong to rotate at a higher speed. Eckel offers an RPM (Revolutions per minute) Control which is a flow divider to decrease the amount of hydraulic fluid that reaches the tong if needed, the remaining fluid is returned to the power unit reservoir. By decreasing the amount of fluid reaching the tong the operator is able to control the maximum RPM of the tong.

Field tests have shown depending on several factors most power units used in above 32 degrees Fahrenheit conditions no matter if your hydraulic oil tank holds 200 gallons of oil, will exceed 150 degrees during a short 8 hour job. Most power units without hydraulic oil coolers exceed 170 degrees which is way past the recommended guide lines.

Of the present utility modelly overcome the deficiencies in the prior art part; a kind of open hydraulic power tongs safety guard is provided, has realized that safety door does not shut, hydraulic circuit is obstructed; hydraulic power tongs can not turn round; perhaps safety door one is opened, and cuts off hydraulic circuit automatically, and hydraulic power tongs shuts down automatically; increased the bolt axle simultaneously; guarantee that safety door is closed and put in place, can not open voluntarily, increased security reliability.

Technical solutions of the utility model are made up of safety door, cam link mechanism, Power Tong caliper, protective cover, post rod type two position three way directional control valve, holder, hydraulic motor, hand-operated direction valve, hydraulic control one-way valve and hydraulic line etc., be connected with hydraulic line between cam link mechanism attachment security door and the post rod type two position three way directional control valve, post rod type two position three way directional control valve and hydraulic control one-way valve.Cam link mechanism is by connecting rod, cam, cam fixed axis and link pin are formed, connecting rod links to each other with safety door by link pin one end, one end links to each other with cam, cam is fixed on the Power Tong caliper by the cam fixed axis, cam can rotate around the cam fixed axis, push rod on the post rod type two position three way directional control valve withstands on the positive camber of cam, when safety door opens or closes, connecting rod drives cam and rotates around the cam fixed axis, the push rod that drives on the post rod type two position three way directional control valve moves axially, make the commutation of post rod type two position three way directional control valve, open or close, make the unimpeded or cut-out of hydraulic circuit by hydraulic line control hydraulic control one-way valve.Safety door is made up of safety every body, bolt axle, bolt push rod, handgrip, back-moving spring, screw, bearing pin, pin and extension spring etc., handgrip is fixed on safe every body by bearing pin, one end of handgrip is connected with pin with the bolt push rod, bolt push rod one end has back-moving spring, one end links to each other with the bolt axle, on safety every body, bolt axle one end is inserted in the lockhole of setting on the Power Tong caliper back-moving spring by screw.When safety door is opened, need manually pull handgrip, jack-up bolt push rod and bolt axle, the bolt axle breaks away from from the lockhole that the Power Tong caliper is set, and safety door just can be opened.When safety door is closed, extension spring pulling safety door is closed and is put in place, the D face of bolt shaft end is the inclined-plane, when contacting with the Power Tong caliper, can promote to move on bolt axle and the bolt push rod, make the bolt axle slide into the lockhole of setting on the Power Tong caliper, back-moving spring drive bolt axle and bolt push rod are descending, the bolt axle puts in place, and safety door is fastened.It is characterized in that: cam link mechanism is made up of connecting rod, cam, cam fixed axis and link pin, connecting rod links to each other with safety door by link pin one end, one end links to each other with cam, cam can rotate around the cam fixed axis, push rod on the post rod type two position three way directional control valve withstands on the positive camber of cam, can move axially with cam rotation.Safety door is made up of safety every body, bolt axle, bolt push rod, handgrip, back-moving spring, screw, bearing pin, pin and extension spring.

The beneficial effects of the utility model are that the security performance of open hydraulic power tongs is significantly improved, and protect operator"s personal safety more reliably.

Late last year, following widespread power shortages, China’s leadership repeatedly emphasised the importance of ensuring energy security – a country’s ability to secure sufficient and affordable energy supplies without interruption.

The nation’s daily output from coal mining has set “record highs” multiple times in recent months due to boosts in production capacity. The coal stock at coal-fired power plants has been kept at “historically high levels”.

Administratively, at least five new major coal-fired power projects were approved for construction in the first six weeks of the year and three “billion-dollar” coal mine projects were greenlighted in February.

In terms of policy, China’s top administrative organ announced in mid-February that coal supply “will be increased” and coal power plants “will be supported” to run “at full capacity” to meet electricity demand.

The recently published 14th five-year plan (FYP) for the energy sector has also stressed coal’s role in “ensuring the basic energy needs” and highlighted coal power’s importance in supporting the power system.

China is also home to the world’s largest fleet of coal-fired power plants, making up around 50% of the operating capacity globally. A global coal map produced by Carbon Brief shows the high concentration of coal power plants in China.

Due to its close ties with the economy, coal has been embedded deeply into the country’s social and economic structure, especially its energy system. For example, China’s power grid has been built to solely accommodate coal power, says China-based Dr Kevin Mo, who describes coal as “China’s most dependable energy resource”.

Dr Mo is principal at innovative Green Development Program (iGDP), a consultancy focusing on green and low-carbon development in Beijing. He explains coal’s importance to China’s power grid to Carbon Brief:

“The whole grid’s transmission, distribution and operation logic all centre around coal power. If the grid is to cater to renewable energy, the transmission, for example, would need to be completely different. That is why the transition of the energy system would not be that fast.”

Dr Mo says that because China has its own coal but depends highly on imports for oil and gas, policymakers need to ensure that, if the worst comes to the worst, the country’s basic social and economic activities would still be able to run on coal power. Therefore, they need to make sure that the country has sufficient mining and production capacity while also trying to develop renewable energy.

“Tomorrow China could get rid of all the coal [consumption], but what about heating, right? What about the workers? Besides, our coal power fleet has only been running for an average of a dozen years. If they are all shut down, who will pay for the stranded cost?…We need to have a good pathway for coal exit and that is why we say that we have to promote [such work] in an orderly manner.”

Chinese energy researcher Dr Zhu Tong told state TV that coal is the “staple” of China’s energy system. Therefore, reducing coal consumption would have a “completely different” economic effect on China compared to Europe, whose main energy sources are oil and gas.

‘New energy’: China has not given an official definition of "new energy" so far. But, according to a book published by Tsinghua University, the term refers to the renewable energy developed and utilised using "new technologies". It covers solar, hydro, wind power, biomass energy and hydrogen fuel, among other energy forms. Another book describes "new energy" as alternative energy, which represents “all energy forms outside traditional energy”. China’s National Energy Administration said in 2021 that the country was promoting "new energy" as the main body of electricity supply in its “new style” electric power system to achieve its climate goals.

The first occurred in May and hit five provinces in southern China, including Guangdong, which is known for its manufacturing industry. China’s state news agency Xinhua reported at the time that Guangdong’s power grid operator had had to ration the electricity for businesses to tackle “record-breaking” power consumption caused by factors including hot weather and a post-pandemic economic rebound.

But alarm bells did not ring – at least not loudly enough – until a more severe wave of power shortages broke out in August. Electricity rationing spread from southern China to around two-thirds of the nation and from factories to families. (Carbon Brief assessed the causes of the power shortages last October.)

The first signal came from Xi in late September when he was inspecting a factory in one of China’s largest coal-producing regions. Xi described coal as the country’s “main [source of] energy”, signalling the fuel’s key position. (Notably, this speech came six days before Xi announced that the country “will not build new coal-fired power projects abroad” at the UN General Assembly.)

In October, two high-level government meetings – both chaired by China’s premier Li Keqiang – were held to give specific orders to tackle the power shortages and to bolster supply security.

Almost immediately, authorities in major coal-producing regions – including Shanxi, Shaanxi and Inner Mongolia – ordered more than 150 “qualified” coal mines to “release advanced production capacity”, which amounted to 220m tonnes a year, Xinhua reported. The state energy regulator, the National Energy Administration, also sent teams to various parts of the country to “supervise” and “guide” local companies to “solidly implement” the measures of boosting coal production and supply, according to China Power News Network, a state-approved media outlet.

China’s coal production “hit record highs” in both December and across the whole of 2021, according to Reuters. In early January, Xinhua reported that China’s efforts to ensure the supply of coal power had achieved “phased” success. The state news agency described coal as the “ballast stone” of secure and stable energy supply – a metaphor that had been used by the head of the state energy regulator in December. (Coal has also been called “the foundation” and “the last barrier” of the energy system by Chinese officials and state media.)

Then came a sudden rush of approvals for new coal-fired power projects. During the first six weeks of 2022, five new coal power projects with a combined capacity of 7.3 gigawatts (GW) were approved, according to a recent briefing jointly published by the Centre for Research on Energy and Clean Air (CREA) and Global Energy Monitor (GEM). The news came after such permissions had been “essentially frozen in 2021”, the report noted.

In the latest development, China’s 14FYP plan (2021-2025) for the energy sector – a highly anticipated industry roadmap for the next five years – was published on 22 March, further sealing coal’s role in the country’s future power system.

The document instructs all central government organs and regional governments to “enhance” coal’s role in “ensuring the basic needs” of energy security, “give full play” to coal power’s role of being a “supporting” and “flexible” energy source, and “vigorously promote” the “clean and efficient” use of coal.

In a related explanation, China announced in February 2019 that it had built “the world’s largest clean coal power supply system” after completing “ultra-low emissions and energy-saving revamps” on the majority of its coal fleet “two years ahead of schedule”.

Speaking of Beijing’s series of coal-boosting instructions, all of the experts interviewed by Carbon Brief refer to last year’s power shortages as a direct driving factor.

Byford Tsang – London-based senior policy advisor at E3G, a climate change thinktank – tells Carbon Brief that there has been a “shift in the rhetoric” towards coal since the “power crunch”, with the government underlining China’s “endowment” of coal and describing the fuel as the “most prominent” energy source that the country needs to secure and supply.

“Within the plan, there was also language regarding the clean and efficient use of coal and raising coal production and production of oil and gas. All of that is not new, but the power crunch has definitely made policymakers more focused on energy security.”

A separate Bloomberg report said that the effects of the coal push “could already be evident from space” due to a “powerful cloud” of methane captured by a satellite above China. In a report published on 21 March, the outlet said that a boost in coal mining may have led to the plume of methane – a potent greenhouse gas (GHG) with an estimated warming potential of around 30 times that of CO2 – that has been detected in a location near a coal mine in Inner Mongolia.

Apart from the recent coal-production boost, China’s continuous construction and approval of new coal-fired power plants also form part of the picture as to how Beijing views the role of coal.

While more than 40 countries pledged to phase out their use of coal-fired power at last November’s COP26, the construction of new plants is expected to carry on in China.

Currently, China is home to more than half of the new power plants that are expected to be built in the world, according to the Global Coal Plant Tracker. The database shows that, as of January 2022, 158GW of new coal-fired power capacity had been announced, pre-permitted or permitted in China, making up 57% of the global pipeline.

The briefing by CREA and GEM finds that China started construction on 33GW of new coal power plants in 2021, “the most since 2016 and almost three times as much as the rest of the world put together”.

“China will strictly control coal-fired power generation projects and strictly limit the increase in coal consumption over the 14FYP period (2021-2025) and phase it down in the 15FYP period (2026-2030).”

It is worth noting that, although China is still planning, approving and building new coal-fired power plants, the new projects usually use “high-efficiency” units that are aimed at reducing coal consumption and pollution.

A scheme issued last November by the National Development and Reform Commission – the state economic planner – on the “retrofit and upgrade” of coal power has given detailed instructions on the “efficiency” levels that new and existing coal power units need to reach in various aspects. In addition, the document stipulates that new coal power capacity “may” replace the capacity left by the “backward” capacity that has been shut down. (China has been closing down small, older and more polluting units over the past few years.)

Matt Gray of TransitionZero says that even though the new coal power plants that are being built in China do not involve “enormous” investments in themselves, what they mean is that “China does see coal as a primary source of securing energy, still”.

“Usually, it would take a company two to three years to prepare the documents to apply for the construction approval [for a coal-fired power plant]. The string of approvals means that the operators had been well prepared and waiting for the floodgates to open.”

Dr Mo explains that the “impulse” comes from local governments because building coal power plants can help boost their regions’ economic performance. Besides, some provinces want to build coal-fired power plants so that they can stop relying on other provinces for electricity due to the province-based setup of China’s power grids, Dr Mo adds.

(Currently, applications for new coal-fired power plants are verified and approved by provincial governments in China, after the central government delegated its power to them in 2014. However, the provincial governments do not have 100% authority on the matter, either. Carbon Brief understands that, although they are the one to issue the permits, they must follow – and sometimes guess – the central government’s policy direction while considering the applications. This Carbon Brief guest post touched upon the topic.)

Some experts perceive new coal-fired power capacity as “necessary” to ensure a stable grid for meeting growing demand in the near term, according to Dr Ryna Cui at the University of Maryland School of Public Policy.

“Given the construction period of coal plants [is] between 18 to 36 months or even longer, [China] is likely to see continued coal power capacity growth over the next few years even if most early stages projects are cancelled. Total installed capacity will also depend on how much older plants can be retired.”

The “argument” mentioned by Dr Cui echoes recent instructions coming out of Beijing, which now regards coal power as part of the nation’s renewable-led power system in the future.

A high-level meeting chaired by Xi in January instructed that the country should “vigorously plan and construct” a “new energy supply and accommodation system” (新能源供给消纳体系), which would see “large-scale” solar and wind energy bases as the “foundation”, “clean and efficient” coal power capacity as the “support”, and “stable, safe and reliable” ultra-high-voltage transmission lines as the “carrier”.

Interpreting the directives, Prof Zeng Ming from the Energy Internet Research Centre at the North China Electric Power University in Beijing told Yicai – a Shanghai-based financial publication – that a main method used by China to build such a future system is to pair large wind and solar farms with “clean and efficient” coal power capacity in their surrounding areas. The latter could “balance out” the “instability” of renewable resources, Prof Zeng noted. He added that power would be sent for long distances to load centres by ultra-high-voltage transmission lines in the future system.

Zhang Jianhua, the head of China’s state energy regulator, told China Power News Network that while China must “accelerate” the development of non-fossil fuels, coal power would be tasked to provide “flexible” services to help the power system take in more new energy.

“The development of the entire new type power system in the future needs optimised combinations of fossil fuels and non-fossil fuels, traditional energy and new energy. [They] need to play different roles and work together.”

All these instructions and comments help to provide an official explanation as to why China is still approving and building new coal-fired power plants, as well as retrofitting existing units.

China has sent out “very clear” messages that the “role of coal power has changed”, according to Dr Xie Chunping from the Grantham Research Institute on Climate Change and the Environment. In her view, building new coal-fired power capacity is “important” for ensuring power supply during energy transition when growth in non-fossil energy power generation is not large enough to cover incremental increases in electricity demand.

Dr Xie tells Carbon Brief that the Chinese government has indicated “clearly” that new coal-fired power plants will be treated as “flexible resources or capacity” in the future to help ensure the security and stability of power supply – instead of operating at their full capacity.

Such a message means that building new coal-fired power plants does not necessarily equal an increase of CO2 emissions in the future, as those new plants’ actual operating hours could be controlled at “a very low number” once renewable capacity builds up, Dr Xie explains. She adds:

“Although those newly built coal-fired power plants will not retire in a short period of time, their operating hours can be very low. The reason why they need to exist and their existence is very important is that in the short term they can meet the fast growing electricity demand, while in the long term they can work as peak regulation capacity and support high penetration of renewable integration through providing the necessary flexibility.”

“When renewable energy and energy storage technologies are fully developed, [China] can rely more on wind and solar generation and reduce the utilisation of coal power capacity whenever possible. This energy transition is not only good for the environment and climate, but also crucial for ensuring national energy supply security in the long term, as renewables are much safer than fossil fuels which are often associated with uncertainties and geopolitical conflicts.”

On the administrative level, China’s state energy regulator has said that, “in principle”, China will not build coal power projects whose sole purpose is to generate electricity in the 14FYP period.

But the authority hinted that some coal power projects would still be approved and built as it said that the country would “arrange a certain scale of supportive power sources to ensure the security of electricity supply, as well as adjustable power sources to facilitate the accommodation of new energy”.

Dr Xie says the state energy regulator intended to answer a key question through the messages: is China going back on its climate commitments by building new coal power capacity? According to its response, the answer is “no”, because China has assigned a new role for coal power, Dr Xie explains.

E3G’s Byford Tsang says that the response served two purposes. One is to explain some of the elements in the energy 14FYP plan. The other is to clarify how China plans to “strictly control” the buildout of coal power plants.

The explanation by Chinese policy advisers also pointed to the “changing role” of coal power, as Dr Xie has mentioned. Prof Wang Zhongying – another senior adviser to the Chinese government at COP26 – told Carbon Brief in an interview that there is a “widespread misunderstanding” that China’s climate pledges means that it would stop building coal power plants.

Prof Wang emphasised that what China talks about is exiting the consumption of coal, not the installed capacity of coal power generation. Prof Wang elaborated in his interview:

“In some places, it is possible that green electricity from wind and solar, for the moment, due to the grid [availability] or other reasons, such as network load, cannot be delivered. But if it [such places] happens to have coal [supply] and installed [coal-fired power generation] capacity, then it can build [some coal power plants]. It is possible that [such places] will develop a few new coal power plants sporadically. But, at the same time, the old and ancient installed capacity will also be retired.”

“From our point of view, what we need to do now is to further constantly lower the operating hours of installed coal power, while keeping the power system operating smoothly, safely and efficiently. And, here, ‘efficiency’ means to accommodate more [renewable energy].”

“[The recent coal push] might not have a big impact on China meeting the 2030 target alone, but it will make China’s transition [towards carbon neutrality] more costly because more new coal power plants will mean more stranded assets and the local economy will rely more on fossil fuels and it is going to make it harder to move away.”

Tsang expects the combination of the “power crunch” and the “increasing geopolitical tensions” between China and “the West” to give Chinese policymakers “a more difficult choice” in balancing the need to transition its energy structure and to “save” energy security “because coal is the fall-back option”.

Chai stressed that the operating efficiency of China’s coal-fired power units were “generally high” (something Yu Aiqun and Dr Xie Chunping tell Carbon Brief, too) and that coal-fired power capacity “will grow appropriately before 2030”. He said that those newly built units would “continue to play a role in the future” and even become “an entry ticket” for investment in renewable energy, due to China’s current policy.

Regarding the financial prospect for those newly built coal power plants, Chai told the outlet that China’s power pricing system could be reformed to ensure that electricity generated by those plants would be paid “relatively higher” prices as a supportive measure. He added:

“Therefore, in the future, coal power [plants] would not need to operate for more than 4,000 hours to make a profit. It is possible that [they] could make profit by generating power for more than 1,000 or even just several hundred hours.”

Speaking of China’s construction of new coal power plants, Dr He says that, although the new builds are usually “high-efficiency” plants, if they are not accompanied by the retirement of small inefficient plants and flexibility retrofit of existing plants, they “will make it harder for China to deliver its climate pledges”.

On whether “high-efficiency” coal-fired power units could help reduce CO2 emissions, Matt says that the “high-level” answer is “no”. A country “cannot just sub out the existing fleet with high-efficiency plants with the hope of being net-zero in the long term”, Gray notes.

“As a rule of thumb, an average coal-fired power plant has an emission intensity of about 900 grams of CO2 per kilowatt-hour (gCO2/kWh). To be net-zero aligned, based on the IEA’s net-zero emissions scenario, the carbon intensity will need to be around 140gCO2/kWh by 2030. The most efficient coal plants have a carbon intensity of 650gCO2/kWh.”

In terms of the “efficient” use of coal, Dr Xie notes that the move intends to reduce CO2 emissions by “further lowering” the coal consumption of a coal power unit when it generates electricity.

According to China’s scheme on the “retrofit and upgrade” of coal power published last November, the coal consumption in 2020 of those coal-fired power plants whose capacity is six megawatts (MW) or higher stood at 305.5 grams of standard coal equivalent per kilowatt hour (gce/kWh). (The figure has declined by 3% compared to 2015, 8% compared to 2010 and 17% compared to 2005.)

The scheme stipulates that newly built coal-fired power units should “in principle” be “ultra-supercritical units” whose coal consumption is lower than 270gce/kWh. It requires the average coal consumption of all coal-fired power plants nationwide to be lower than 300gce/kWh by 2025.

Dr Xie points out that the scheme also emphasises retrofitting existing units to lower thermal coal use for power generation and to increase their capabilities of providing flexible peaking services to facilitate the accommodation of clean energy. For those units whose coal consumption is higher than 300gce/kWh and cannot be retrofitted or are deemed “backward”, they should be “shut down but not demolished” to be used as backup power sources, Dr Xie cites the scheme as saying.

Despite their different views on the role of coal power and the impact of China’s coal drive on its climate goals, all experts interviewed by Carbon Brief agree on one thing: the recent coal push does not mean that China is rethinking or walking back on its climate commitments (although some experts caution that China’s pledges are not ambitious enough for meeting the 1.5C target under the Paris Agreement).

K&S Power Tongs committs to providing quality casing services in a safe, reliable, cost efficient and timely manner. Safety is everyone’s full time job and we are committed to the prevention and elimination of all safety nad health hazards. All operators are specially trained and industry safety certified. Safety is never compromised. Unsafe acts are never tolerated and our employees are held accountable to work safe.

K&S Power Tongs offers coventional and integral power tong services, volant casing running tools, computer torque-turn systems, power thread washing, thread inspection, handling equipment rentals and light oilfield hauling.

We"re professional hydraulic sucker rod tong manufacturers in China, providing customized products made in China with competitive price. If you are going to wholesale bulk hydraulic sucker rod tong in stock, welcome to get quotation from our factory.

XQ140 micro-marking and no-marking hydraulic power tongs is a special equipment and open power tongs which is applicable to make up or break out 41/2"-51/2" casing during oil field work over operation.

We"re professional hydraulic low stress power tong manufacturers in China, providing customized products made in China with competitive price. If you are going to wholesale bulk hydraulic low stress power tong in stock, welcome to get quotation from our factory.

The Tong Line Pull and Tong Torque Systems are designed to give accurate readings for makeup and breakout torque to reduce drill collar and tool joint failure.

The systems indicate the torque applied to drill pipe, drill collars, tubing, and casing while joints are made. This is important for reducing drill collar and tool joint failure resulting from improper make-up. Each tong system consists of a hydraulic load cell, shackles (on tension type models), hose assembly, 6" liquid filled gauge with damper assembly, bracket to mount gauge (except on panel mount versions), and recharge kit consisting of hand pump, and (1) qt. of instrument fluid. Both types of Tong Systems are available in English, Metric, or dual scale capacities up to 30,000 pounds straight line pull. There are two types of systems available:

Indicates make-up or break-out torque in pounds of line pull for tool joints, drill collars, and drill string components. This is useful in applications where the user wants to use the system with different length tong handles. To obtain the foot pounds equal to the pounds reading on the indicator the operator simply multiplies the pounds reading of the indicator by the tong handle length (in feet) that he is using, and this will give him the foot pounds equivalent.

Indicates torque in foot pounds applied to each joint when using power tongs to run pipe or casing. These systems are available for specific makes and models of power tongs and come with either compression or tension type load cells.

Contact our expert sales staff for pricing, availability and product specifications for the Gill Power Tong right for your application at the link provided on this page.

Hydraulic power tong is a workover tool that utilizes the power of the drilling rig to remove the workover tool. The advantages are obvious and easy to use.

Drilling process in the operation of the largest workers, the most heavy workload is on, unloading pipe fittings and drill thread, in the past has been with a pipe clamp or chain clamp, not only labor-intensive, and dangerous. Hydraulic power clamp is the use of oil rig power operation of the mechanical, unloading deduction tool, can greatly reduce the labor intensity of the workers to avoid or reduce the occurrence of injury accidents. At the same time, hydraulic power tongs to strengthen the pipe, drill wire twist torque, reduce the pipe, drilling tool trip accident occurred. The working principle of the hydraulic power clamp is to pass the power of the drilling rig to the hydraulic power clamp hydraulic motor by the stroke reducer, and then by two or one deceleration, the jaw opening gear rotation, resulting in two high and low speed, Pipe tool (drill) rotation. When the opening gear rotates, the plate frame does not rotate under the braking action of the brake hammer, so that there is a relative movement between the opening gear and the palmar plate. In this way, the two rollers of the palmar plate will climb on the slope plate and force the clamp on the hips board to move toward the center of the pipe (drill) until it is clenched with the tool and then with the opening gear Together drive the pipe (drill) to rotate.

SKT series dual-purpose power tongs is applicable to tripping operation and running-in casing operation in the drilling activities in petroleum and mining. It is a new power tongs dependently developed by ourselves according to the requirements from oilfield customers. The power tong integrates the function of drill pipe power tong and casing power tong. It can meet the requirements under the operation of frequent tripping or connecting single pipe. In addition, it can be used to run in the casing with small diameter. During the conversion between the two operations, it is not necessary to replace the equipment. It can increase the wellhead operation efficiency and reduce the labor intensity.

Low stress hydraulic power tong is applied for unloading 2 3/8"-4 1/2 tubing and 4 1/2"-5 1/2"casing pipe in marine oil filed and well service operation. It"s an open-throat designed power tong. It"s an improvement basing on absorbing the advantaged product skill of the world, with changing the special clamp head, which can improve the wearness of tube and no indentation, widely used in the marine oil filed, the high sulfur content field for unloading 9 Cr, 13 Cr, 22 Cr, 25 Cr and other special pipe.

Product features describe as:1. Master tong with double brake structure, greatly increased the braking force ,which can ensure reliable clamping, preventing from slippage .

The machine is a combination of master and backup tong, by operating the multiple valve lever, which can realize the tongs respectively clamping or loosen .

Equipped with extend leading bar and gantry back-up bar, can realize the tongs clamping concurrently,facilitate for the sensor installation, to ensure no twisting while processing .Ensure the torque device performs accurately.