pup joint well drilling made in china

One is a short Drill Pipe used to adjust the length of the Drill String; The other one OCTG Pup Joint is a pipe of non-standard length, which is used to adjust the length of tubular strings to its exact requirement.

Vigor can manufacture the Tubing Pup Joints by different technology - Upsetting and Machining process. if you have a special requirement on the Pup Joint production process, please just specify.

If you are looking for a competitive, high quality and fast delivery oilfield pup joint in stock, or if you are planning to buy pup joint API from one of the leading casing and tubing pup joint manufacturers, API 5CT pup joint in stock, l8013cr pup joint, nue/nue tubing pup joint manufacturers and suppliers China, please feel free to contact VIGOR.Details  of  API  Spec.  5CT  Oil  Tubing  Pup  Joint

The drill pipe joint is an important connecting part of the oil drill pipe and drilling tool, and is widely used in the oil drilling industry. Our pup joint drilling is finished with high-quality and unique materials for excellent durability and precise dimensional accuracy. The threads on the fittings are cut on a CNC machine, which ensures high precision of the threads and prolongs the service life of the fittings. Considering the specificity in practical applications, we use phosphate coating or copper plating to enhance the wear and chemical resistance of the joint. This pup joint drilling has good mechanical strength and comprehensive performance and meets international standards, it can be widely used in oil, natural gas, sewage treatment and other industries.

Outside Diameter of Tubing Joint: From 2-3/8"(60 3mm) to 4.5"(114.60mm) Pipe End: EUE/NUE Outside Diameter of Casing Joint: From 4-12"(114 3mm) to 20*(508mm)

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Find parts you need to repair or maintain your machines. At Alibaba.com, you can shop for pup joint drill pipe at affordable rates to tackle new obstacles and challenges. In the ever-changing industry, you can find what you need and speak to the supplier directly. Thanks to Alibaba’s collection of wholesale pup joint drill pipe you also get to buy these parts at lower prices, which means you can explore new levels every day more comfortably. From bulldozers to dragline excavators, wheel tractor scrapers to shotcrete machines, any part you need for a heavy-duty mining machinery; you can find it at Alibaba.com.

Looking for purpose-built machine parts? Find them at Alibaba.com. From new components to used parts straight from the manufacturers. Plus, if you need custom-made pieces, you can chat with the supplier, give specifications and wait on delivery. From stone crushers to excavator undercarriage parts, buckets, and even drill bits to get you through the rocks, the pup joint drill pipe from Alibaba offers you the chance to continue operating without a hitch. Whether you are looking to introduce concrete into the rock walls for more consistency and safety during mining, then pup joint drill pipe that goes at wholesale prices at Alibaba will be an excellent addition to your machinery.

Before buying a component, you’d want the equipment to suit your application and offer value. The list of pup joint drill pipe at Alibaba.com lets you dig into earth deposits, and the compare tool checks out other similar parts to give you the information you need to make a purchasing decision. You’ll get wholesale pup joint drill pipe that specializes in mining, with reinforced chassis, and run on more powerful engines. Whether you want to transport minerals or the workers to the mining site, introduce explosives or arms to help you remove materials from your mine pits, Alibaba.com has it all.

A pup joint is Casing, Pipe or Tubing shorter in length than a standard tubular string. This allows for the adjustment and installation of tools and various tubular components when placement downhole is critical for a specific project. A Spacer Pipe is another reference used to identify pup joints. Pup joint features consist of connections, lengths, weights and material grade.

Tubing pup joints are desiged and manufactured as per API 5CT to be used be adjust height of tubings, and tubing pup joints are made of seamless steel tubings. Material grade of tubing pup joint can be avalialbe in J55, K55, N80, L80 or P110, sizes of tubing pup joint range from 2⅜¡± to 4½¡±, thread of pup joint can be 8RD, 10RD or BTC, and end connection types can be NUE and EUE. length of tubing pup joint are often offered in 2ft, 3ft, 4ft, 6ft, 8ft, 10ft and 12ft, length of pup joint for special purpose can be available as per order. Tubing pup joints are machined with interchangeable Pin & Box thread on two ends or other configuration, one end is equipped with coupling, and another end is protected with closed end thread protector. Nominal weight of tubing pup joint is the same as tubing. Tubing pup joints are internally and externally hydrostatic tested with tension and compression loads, and torque tested, electromagnetically inspected, pup joint is full-body drift and straightness visual inspected, and phosphated and dye-penetrant inspected. and finally painted by machine to ensure excellenct appearance. Finished tubing pup joints are often packed by steel belts in bundles, and then fixed in steel rack for easy transportation.

Casing pup joints are desiged and manufactured as per API 5CT to be used be adjust height of casings, and casing pup joints are made of seamless steel casings. Material grade of casing pup joint can be avalialbe in J55, K55, N80, L80 or P110, sizes of casing pup joint range from 4½¡± to 13⅜¡±, thread of pup joint can be 8RD, 10RD or BTC, length of tubing pup joint are often offered in 2ft, 3ft, 4ft, 6ft, 8ft, 10ft and 12ft, length of pup joint for special purpose can be available as per order. Casing pup joints are machined with interchangeable Pin & Box thread on two ends or other configuration, one end is equipped with coupling, and another end is protected with closed end thread protector. Nominal weight of casing pup joint is the same as casing. Casing pup joints are internally and externally hydrostatic tested with tension and compression loads, and torque tested, electromagnetically inspected, pup joint is full-body drift and straightness visual inspected, and phosphated and dye-penetrant inspected. and finally painted by machine to ensure excellenct appearance. Finished casing pup joints are often packed by steel belts in bundles, and then fixed in steel rack for easy transportation.

Integral pup joints and crossoversare widely used in oil and gas for standard or sour gas (H2S) Service. Shanghai PME Industrial Co., Ltd. is a China supplier in quality high pressure integral fittings.

For cementing, acidizing, fracturing and circulating operation, PME Industrial pup jointsand crossovers are in working pressure 10000 Psi to 15000 Psi, sizes in 1" to 4". HP integral flowline fittingsare forged by PME Industrial with high quality seamless pipelines to guarantee the safety for oil & gas application.

The joints are capable of handling a variety of fluids and a working pressure of 15,000 psi. Available in lengths up to 15 feet, they are pressure rated to 10,000 psi for sour gas service.

The high pressure fluid control products are widely used in the field of oilfield drilling, cementing, logging, testing, acid fracturing, coiled tubing, sand control operations and offshore platform among others. Meanwhile, we also can supply various customer-made manifolds for desert, offshore application. These products nominal bore ranging from 1”-5”, pressure ranting from 7-140Mpa(1000-20000 psi).

We are a newly rising star in the field of China Manufacturer Integal Pup Joint for Oil and Gas Drilling, with rapid business development. Our experience makes us important in our customer eyes. We seize business opportunities, dare to innovate and continuously improve product quality.

A kind of oil drilling of the present invention is with uninterrupted circulation short circuit, and one of its specific embodiment as shown in Figure 1, comprises the normally closed ball-and-seat 300 of improved short circuit body 100, automatic center gate valve 200 and side direction; Be provided with the cavity and the inner card cage of adaptive installation automatic center gate valve 200 in the inner chamber of short circuit body 100; The sidewall of short circuit body 100 is provided with the vestibule of adaptive installation side to normally closed ball-and-seat 300; Automatic center gate valve 200 is coaxial to be arranged in the inner chamber of short circuit body 100; The normally closed ball-and-seat 300 of side direction is arranged on the local sidewall of short circuit of automatic center gate valve 200 belows.

Based on above-mentioned oil drilling with uninterrupted circulation short circuit, the present invention also proposes a kind of oil drilling with the continuous circulating mud method of uninterrupted circulation short circuit, one of its specific embodiment, may further comprise the steps: reduction is driven mud pressure via the top that short circuit body 100 tops enter, and changes by the normally closed ball-and-seat 300 of side direction that is positioned on short circuit body 100 sidewalls to enter the short circuit body 100 inner circulating muds that are used as; Increase the pressure of circulating mud, make to be positioned at the normally closed ball-and-seat of side direction 300 tops and to close automatically with the automatic center gate valve 200 of short circuit body 100 coaxial settings; Reduce the pressure of circulating mud, mud pressure is driven on the top that increase and recovery short circuit body 100 tops enter, and automatic center gate valve 200 is opened automatically, and the normally closed ball-and-seat 300 of side direction is closed.

Compare with common short circuit control bore hole annulus ECD method of the prior art, a kind of oil drilling provided by the present invention is with uninterrupted circulation short circuit and continuous circulating mud method thereof, owing to adopting combined short circuit body 100 structures of the normally closed ball-and-seat of the accessible automatic center gate valve 200 of big latus rectum and triple formula side direction 300, on needs dismounting drilling rod, buckle, shackle and when making a trip, change from the normally closed ball-and-seat 300 uninterrupted circulating muds of side direction, utilize the automatic center gate valve 200 of the normally closed ball-and-seat of pressure automatic cut-off side direction 300 tops of circulating mud, thereby kept the stable of borehole pressure continuously, controlled the ECD value of bore hole annulus effectively, the good result that has kept the stable of the borehole wall and well is cleaned, prevented to collapse and the formation of lower curved section cutting bed the generation of various complex situations such as the card leakage spray of having avoided collapsing; Be suitable for the super deepwater drilling of deep water, extended reach well drilling, under balance pressure drilling, and be fit to tackle in the job execution of complicated technology well of needs controlled pressure drillings such as easy spray Absorption Wells and bottom presser sensor well.

In the preferred implementation of oil drilling of the present invention with uninterrupted circulation short circuit and continuous circulating mud method thereof, comprising can be by utilizing uninterrupted circulation short circuit to regulate circulating mud mutually and pushing up the operation that the pressure that drives mud is controlled the equivalent circulating density of bore hole annulus.Can solve thus in the normal or improper drillng operation except under the shackle in the dismounting and the situation that makes a trip, need the technological problems of control bore hole annulus ECD in real time.

Automatic center gate valve 200 is to wash gate valve lid 250 open by high-pressure slurry to finish mud circulation, guarantees the continuous circulation and the pressure stability of input mud in the drilling well normal operation; And in last shackle with when improper operation such as making a trip, the valve gap of the lock of automatic center gate valve 200 is in closed condition under the pressure of circulating mud.

Further, the normally closed ball-and-seat 300 of side direction also comprises valve seat 330, spool 320 and relief valve 310; Valve seat 330 is arranged on the valve body 370; Spool 320 is arranged on the valve seat 330; Relief valve 310 is arranged on the spool 320.Valve seat 330, spool 320 and relief valve 310 constitute triple formula pressure protect structures of the normally closed ball-and-seat 300 of side direction, can effectively solve well kick, blowout and leakage problem.

The normally closed ball-and-seat 300 of side direction is to promote valve gap 350 by high-pressure slurry to finish mud circulation, guarantees the continuous circulation and the pressure stability of input mud in last shackle process; And when the drilling well normal operation, the valve gap 350 of the normally closed ball-and-seat 300 of side direction is in closed condition under the effect of torque spring 340.

Oil drilling of the present invention with the operating principle of uninterrupted circulation short circuit is: during normal drillng operation, the top is driven the centre bore of mud by short circuit body 100 tops and is entered drilling rod and circulate, at this moment the without hindrance automatic center gate valve 200 of big latus rectum is in opening state, the normally closed ball-and-seat 300 of triple formula side direction is in closed condition, has guaranteed the stable of the unimpeded and inner mud pressure of hydrophthalmia effectively.

When on the dismounting drilling rod during shackle, this moment, drilling rod stopped operating, circulating mud is linked on the normally closed ball-and-seat 300 of side direction by special joint, under the effect that the pressure of circulating mud increases gradually, valve gap 350 on the normally closed ball-and-seat 300 of side direction is opened, circulating mud enters short circuit body 100 inside, and along with driving mud pressure and reduce gradually in the top, when being reduced to a certain degree because mud differential pressure action up and down, the gate valve lid 250 of the big without hindrance automatic center gate valve 200 of latus rectum will be closed automatically, treat can dismantle or install drilling rod after the mud system release is driven on the top; And can import circulating mud this moment by the side direction ball-and-seat, with circulation of mud in the assurance well and stablizing of pressure.

After last shackle work is finished, it is normal that the supply of top mud recovers, the top on short circuit body 100 tops is driven mud pressure and is begun to increase, when the gate valve lid 250 of automatic center gate valve 200 is washed open, reduce the circulating mud pressure of normally closed ball-and-seat 300 inputs of side direction gradually, the valve gap 350 of the normally closed ball-and-seat 300 of side direction is in the closed position under the effect of spring 340, it is normal that the mud pressure of short circuit body 100 inside recovers, the side valve jointing of then dismantling, with valve seat 330, spool 320 and the relief valve 310 normally closed ball-and-seat 300 of side direction of packing into so just can continue drilling well and carry out operation.

As seen, oil drilling of the present invention all bears high-pressure at the same time and axially rotates double action with each component in the uninterrupted circulation short circuit in above-mentioned several links.

Oil drilling of the present invention is suitable for the super deepwater drilling of deep water, extended reach well drilling, under balance pressure drilling with uninterrupted circulation short circuit and continuous circulating mud method thereof very much, and be fit to tackle in the job execution of complicated technology well of needs controlled pressure drillings such as easy spray Absorption Wells and bottom presser sensor well, to guaranteeing downhole safety, shorten drilling time, reduce drilling cost and be significant, especially the complicated well of geological condition is played a key effect especially.

For example, can be used for the super deepwater drilling of deep water: the super deepwater drilling of deep water, because of its pore pressure grad and fracture pressure gradient difference very little, narrow pressure window will be the super deepwater drilling one big technical barrier of deep water, to cause slush pump one to open one to stop and can not circulate continuously, and, very easily causing complex situations such as formation fracture and leakage well collapse to producing the positive/negative pressure excitement in the well, oil drilling of the present invention is fabulous one of the means that tackle with uninterrupted circulation short circuit and continuous circulating mud method thereof.

And for example, can be used for the extended reach well drilling well: oil drilling of the present invention can reduce the well annular space with uninterrupted circulation short circuit and continuous circulating mud method thereof and stop up, prevent that cutting bed from forming, improve the hole cleaning ability, reduce moment of torsion and frictional resistance, optimize drilling well orientation and TRAJECTORY CONTROL, and the generation of lock of tool drilling when effectively preventing to connect column; As seen, well stable bores extended reach well smoothly to safety and seems extremely important.

For another example, can be used under balance pressure drilling: do not have the under balance pressure drilling of circulation continuously, the pressure balance that well needs step-down and pressurizes and set up system again, this process often spends many man-hours, and can cause the undesired of down-hole, influence is crept into, and oil drilling of the present invention then can save this complex process time with uninterrupted circulation short circuit and continuous circulating mud method thereof, improves safety drilling efficient.

And, can be used for tackling easy spray Absorption Wells: oil drilling of the present invention is with uninterrupted circulation short circuit and continuously the circulating mud method circulates continuously that the drill string external and internal pressure remains equilibrium state in the well, avoided the down-hole positive/negative pressure of Ting Beng ∕ turn on pump exciting problems such as well kick, blowout and leakage take place, guaranteed drilling safety.Uninterrupted circulation short circuit itself can have the inner blowout preventer system, also is the safety device that prevents blowout.

And, can be used for tackling the responsive well of strata pressure: as shale, salt rock stratum well etc., oil drilling of the present invention circulates continuously with uninterrupted circulation short circuit and continuous circulating mud method thereof and keeps steady pressure in the well, prevented the necking down of mud shale, collapse etc., having kept wellbore stability, also is the key that safety is bored this class well smoothly.

In addition, also can be used for controlled pressure drilling: oil drilling of the present invention with uninterrupted circulation short circuit and continuously the circulating mud method can effectively control equivalent circulating density (ECD) value of bore hole annulus, this is the key of controlled pressure drilling.

In a word, oil drilling of the present invention is stable for keeping borehole pressure with the continuous circulating drilling technology of uninterrupted circulation short circuit and continuous circulating mud method thereof, prevent that the down-hole well from collapsing, leakage, the generation of complex situations such as well kick blowout, the safe smooth implementation of assurance drillng operation improves the drilling well timeliness, reduce drilling cost, all have great significance and be worth; Some complicated technology wells particularly, often must utilize continuous circulating technology just can finish drillng operation, and the circulating drilling technology is a much progress on drilling technology and the technology continuously, oil drilling of the present invention also will be widely used undoubtedly with one of uninterrupted circulation short circuit and the continuous circulating drilling technology of continuous circulating mud method conduct thereof.

Casing pup joint is mainly used to adjust the height of the casing strings. It is also used to adjust the depth of down-hole tools. Our pup joints are manufactured in accordance with the API Spec5CT specification. The steel grades of the products of this kind are J55, K55, N80 and L80 P110. These products feature high corrosion resistance and long running life. As a pup joints supplier, we also produce the API 5CT tubing pup joint which is the fitting of the tubing strings. And we promise that all our ...

It is produced according to API 5CT Specification. Our precision-engineered pup Joints are ideal for spacing out down-hole assemblies and handling the production of tubing accessories. As a tubing pup joints manufacturer in China, we also provide API 5CT casing pup joint which is the accessory of the casing strings ...

Pup joint is a common fitting used in industry pipeline connection. It is a section of pipe of non-standard length used for making up a string of tubular to an exact total length. This product is a one-piece construction made from alloy steel. It features wing union end connections which eliminate the need for welds and threads. This pipe fitting is capable of bearing diverse fluids and working pressures. Our products in this category include tubing pup joints and the ones for casing pipe.

1.Pup joint is mainly used to correct the overall length of a drill string to land at a specific depth while staying within the working area of the valve.

2.This pipe fitting is used to achieve precise depth readings in a well for various purposes, such as setting valves, nipples, packers circulating sleeves, etc.

As a pup joints supplier in China, Hebei Xinlian (Beijing) Petroleum Pipe Co., Ltd. possesses an advanced process line of pipes for petroleum which consists of first-rate CNC thread cutting machine, automatic screw machine, hydraulic press, jet printing equipment, etc. Our products have been exported to many countries, such as Germany, Japan, Rumania, Czech, Italy, UK, Austria, Switzerland, the US, Argentina and Singapore.

Pup Joint Market: OverviewPup joint is a pipe of non-standard length used to adjust the length of tubular strings to its exact requirement. They are used to adjust the length of drill string for drilling operations.

The pup joint market is expected to grow during the forecast period due to rising investment in numerous exploration activities and advancement in drilling technologies

Pup Joint Market: Regional OverviewMiddle East & Africa is likely to be the most attractive region in the pup joint market during the forecast period, due to rise in demand for oil & gas globally. Manufacturers are entering the Middle East & Africa region in order to gain significant market share.

North America and Europe are expected to be other major markets for pup joints. Technological advancements and increase in foreign direct investment for various exploration projects are anticipated to drive the pup joint market in these regions.

Increase in the population which has resulted in higher demand for oil and natural gas is expected to be a key factor fueling the growth of the pup joint market during the forecast period

Pup Joint: Market TrendsManufacturers offering an extensive range of products and with customization capabilities are increasingly seeming high demand in the market. Apart from providing the desired product, manufacturers are now providing secondary services such as OCTG maintenance and threading repair.

Increase in upstream activities has resulted in quality drilling equipment; also, demand for premium grade pup joint is expected to surge during the forecast period, as it is suitable for harsh environments

Pup Joint Market: Drivers, Opportunities, and RestraintsDependence on oil & gas has increased as various emerging economies rely on petroleum-based products. Petroleum is used as a base material for various chemical products including fertilizers, pharmaceuticals, and solvents.

Government and private companies are showing keen interest in exploring new oil reserves to meet future demands. Investment by major companies in oil exploration is likely to boost the pup joint market.

Generating electricity from renewable offshore wind is becoming cheaper and cost effective. During the forecast period, it is expected that renewable energy will be cheaper than new oil & gas sources. This will act as a restraint to the global pup joint market.

It has been observed that corrosive attack by reservoir contaminants has created a strong demand for higher grade and strength material for pup joints.

Based on region, the global pup joint market has been classified into: North America (U.S., Canada, and Rest of North America), Europe (U.K., Germany, France, and Rest of Europe), Asia Pacific (China, India, Japan, and Rest of Asia Pacific), Middle East & Africa (GCC, South Africa, and Rest of MEA), and South America (Brazil and Rest of South America)

Pup Joint Market: Competition LandscapeEstablished manufacturers operating in the global pup joint market are facing immense competition, owing to presence of many global and regional manufactures. Major players operating in the global pup joint market include Anvil International

The recent report on the pup joint market, with the help of a comprehensive outlook, provides readers with an assessment of the global market landscape. This study on the global pup joint market analyzes the scenario for the period 2019 to 2027, wherein 2018 is the base year and 2017 and earlier is historical data. The report enables readers to make important decisions with regard to their business, with the help of a wealth of information enclosed in the study.

This study on the global pup joint market provides data on the developments of important players and stakeholders in the market, along with a competitive analysis. The report also provides an understanding of strengths, weaknesses, threats, and opportunities, along with trends and restraints in the landscape. Presented in a clear sanctioned manner, the report on the global pup joint market gives readers an individual understanding of the market.

The study also discusses underlying trends and impact of various factors that are driving the global pup joint market, along with their influence on the evolution of the market. The study also offers Porter"s Five Forces analysis, value chain analysis, technology analysis, price trend analysis, and SWOT analysis of the global pup joint market in order to elaborate crucial growth tactics and opportunities for market players contributing to the market.

Key Questions Answered in This Report on Pup Joint MarketHow much revenue will the global pup joint market generate by the end of the forecast period?

This report answers these questions and more about the global pup joint market, aiding major stakeholders and key players in making the right decisions and strategizing for the advancement of their business.

This report on the global pup joint market is based on a complete and comprehensive evaluation of the market, backed by secondary and primary sources. The competitive scenario of the global pup joint market is supported by an assessment of different factors that influence the market on a minute and granular level. By thoroughly analyzing the historical data and current trends, researchers of the pup joint market arrive at predictions and estimations, and calculate the forecast for the market.

This report uses an analytical triangulation method to estimate numbers and figures of the global pup joint market, with both a bottom-up and top-down approach.

The detailed assessment of the global pup joint market, along with an overview of the landscape, has been provided based on a careful examination of the avenues related to this market. Analysts" conclusions on how the global pup joint market is set to grow are based on carefully vetted primary and secondary sources.

Our sino 4 3 4 Spiral Drill Collar, 9 3 4 drill Collar, sale square kellys are highly praised by our customers for their excellent quality, reasonable price and sincere service attitude.Our company is a professional Pup Joints manufacturing supplier and solution expert. We are a high-tech enterprise with independent intellectual property rights. The company has a strong team of technical experts, adhering to professional, innovative, and advanced concepts, and constantly strengthens independent innovation and development research and development, to meet the needs of thousands of customers. Our culture is to learn happily, work happily and live happily. Our company adheres to the employment value of "only talent is to promote, only talent is to use, things do their best, people do their best" and gathering talents from all walks of life. We insist on putting customer satisfaction as the first priority in the practice of the company, and provide different solutions according to customer needs, so as to win the trust and support of our customers. Our non-stop innovative technologies introducing is to develop high value-added products, and to improve business profitability. Talent is the first resource and the most valuable capital for the development of the company, the core driving force for the growth of the enterprise, and the ultimate source of competitive ability. In the process of production and operation, our company implements quality management system, improves operation management and product quality.

Our company can provide any type of pub joints using the same material as our drill collars. All connections are phosphate coated to improve resistance to corrosion.

Pup Joints are used to adjust the height of full length tubing or casing strings. They are also used to adjust the depth of downhole tools. Typical lengths are 2’, 4’, 6’, 8’ and 10’. more. Blast...

Pup Joints are manufactured from AISI 4145H or 4140H-modified alloy, heat-treated to a Brinell Hardness range of 285-341 with a Charpy “V” notch minimum impact strength of 40 ft/lb at 70° F and one...

Mackeral Oil Tools Pvt. Ltd. is an API-5ct, ISO-9001, ISO-14001 and OHSAS-18001 Certified Company. Pup Joint Pup joints are non-standard lengths of piping used to adjust the height of full length...

Drill Pipe Pup Joints. Drill Pipe pup joints are integral-type made of AISI 4140/4145 modified alloy steel bar, fully heat treated to 285-341 BHN and 40 ft-lbs min. impact value. All connections are...

Mackeral Oil Tools Pvt. Ltd. is an API-5ct, ISO-9001, ISO-14001 and OHSAS-18001 Certified Company. Pup Joint Pup joints are non-standard lengths of piping used to adjust the height of...

TSI Flow Products provides a wide range of Flowline and Pup Joints to the oil and gas industry. Available in sizes 2”, 3” and 4” in NACE and Non‐NACE configurations. NPST Pipes are available in...

We adhere to the tenet of "Science and technology as the guide, quality for survival, management for development", and strive to provide customers with high-quality API hexagonal kellys, 3 1 8drill Collar, 9 3 4drill Collar solutions. As one of the most professional Pup Joints manufacturers in China for over 20 years, we"re featured by the best sino petroleum drilling service and equipment. Please rest assured to buy high quality Pup Joints from our factory.