Lifting sub is an above ground tool for lifting drilling tools.It resembles a pup joint, and is used to thread the upper connection of the drill string to make the drill string can be tripped in/out by elevator.

Application:

Drill collar lifting sub is one kind of special tool used in oil, gas and exploration drilling operations. There are two kinds: A type, 18 degree shoulder and B type, 90 degree shoulder. You can select according to structure type of elevators. The connections confirm to API standards.

They are one-piece construction and manufactured from 4145M or 4140HT alloy steel.

Technical Specification:

Saigao Group specializing in design, research and development, processing and manufacturing, sales and export of machinery equipment, with leading products comprising various kind of mud pumps, down-hole motors, any kinds of screen pipes, cementing tools as well as any kinds of wellhead equipment. Just contact us!

Anti bird netting are mainly used to protect fruit and vegetable against from butterflies, birds, pigeons, rabbits, squirrels ,other similar pests and bird block neting .The Bird Netting can easily be fixed on beds, trees, bushes ，and can be used for several seasons.

There are different types of anti bird netting. The different types of anti-bird netting come in different mesh sizes. It is important to choose the correct mesh size for your particular bird issue. It is critical that birds are unable to get past the netting and get trapped behind the netting or stuck in the netting. The larger the bird, the larger the mesh size used.

The color is usually three kinds of black green and white; our anti bird net is made up of 100% virgin materials of polypropylene and Polyethylene ,UV treated, it can have longer life in the outdoors.

1. heavy duty bird netting that is a knotted polyethylene

The anti insect netting is made up of six monofilaments with each strand 0.0012 thick and twisted together to create a strong twine with 160-200 twists per meter. It is ideal in large areas where pest birds are a problem such as warehouse, canopies, airplane hangars and other overhangs.

2.Knitted anti bird netting,It is diamond mesh

3.Extruded bird netting ,made up of virgin black PP material , it is diamond and square 3/4 inch mesh，can be cut to any size. It washes clean and folds for easy, compact storage.Meyabond as a prefessional Anti bird netting suppliers have cheap bird netting,if you want to buy it,we can provide cheap bird netting for sale.

Features

Longer Life-UV resistance, easy installation and light weight.

Easy to install practical and secure, extremely durable net which lasts for years.

Application

In the public and private sectors,  bird netting is necessary, since it can be applied in different areas such as:

Protection of orchards, vegetable crops and macro tunnels.

Protection of constructions, warehouses, buildings.

Protection of churches, ancient monuments.

Aquaculture protection.

Meyabond Industry & Trading (Beijing) Co.,Ltd. is located in Babaoshan South Road, Shijingshan District, Beijing, China.It is an exporter plastic net manufacturer in accordance with ISO 9001 Quality Standard.

What is ASTM A53?

ASTM A53 is a carbon steel alloy which is used in structural steel or  low-pressure plumbing. ASTM International set by the alloy specifications including the specification of ASTM A53/A53M.

ASTM A53 Steel Pipe

ASTM A53 steel pipe is a standard specification for black and hot-dipped, zinc-coated, welded and seamless steel pipe, and is for mechanical and pressure applications as well as for steam, water, gas and air piping in general use. ASTM A53 can be formed and welded. Specify the correct pipe size using the nominal pipe size (NPS). This is the nominal pipe diameter for specified wall thickness (i.e., 4 inch Schedule 40 pipe). ASTM A53 grade b erw pipe is determined according to the nominal pipe size (NPS) system. It is usually available with national pipe thread ends or with plain cut ends. It can be used for the transportation of steam, water, and air. It is also weldable and can be used in structural applications, although A53b steel pipe tub, which is available in the same NPS sizes, is sometimes can be the first choice.

Executive standard: ASTM A53 welded steel pipe for low-pressure fluid transportation ASTM A53 straight seam electric welded steel pipe" Q/HBTC 001-2016 "welded steel pipe"   

Scope of application: conveying low-pressure fluids such as water, air, heating steam and gas; structural use such as machinery and construction.

This article was originally published on Better.com

By Kurtis Rhee

Most homebuyers consider dozens of houses before finding the perfect one, but that’s not the case when it comes to picking a real estate agent. Seven out of every ten homebuyers don’t interview their agent before deciding to work with them.¹ That’s pretty scary considering not all agents are created are equal — as the industry saying goes, 20 percent of the agents do 80 percent of the business. If your real estate agent could make the difference between landing your dream home in a few weeks or losing bids, why wouldn’t you shop around?

Finding an agent who is both good at their job and easy to work with isn’t always simple. That’s why we suggest interviewing at least a couple of real estate agents before picking “the one”. Here are some guidelines for how to decide which agent is a good fit for you.

1. Experience

With markets getting more and more competitive, you want a real estate agent with a proven track record of putting people in their dream homes. Read online reviews, talk to past clients, and most importantly, ask if the agent has recently closed on properties similar to what you’re looking for. Pay special attention to their history with homes in the location and price range you are considering.

2. Expertise

Working with someone who is familiar with your desired area helps to ensure that you’ll only spend time and energy on houses that fit your criteria. First, decide on the factors you want to prioritize in your neighborhood search (schools, walkability, nightlife, etc.), and then, go through them with your prospective agent to get a feel for their local knowledge.

3. Empathy

Ultimately, you want to make sure your agent is someone you are comfortable working with. The house hunt can sometimes take months, especially in competitive markets. Working with an agent who shares your communication style can help make the journey enjoyable rather than stressful. Spend some time thinking about the type of person who you’ll be able to work well with. Do you want someone who is patient and will guide you through the process? Or do you want someone who works fast and is straight to the point? (Your answer will probably be different depending on whether or not you’re a first-time homebuyer or familiar with the area.)

Need help finding the right real estate agent? While there is no obligation to use our suggested agents, we can help you save time and energy by introducing you to one who has been vetted by our team. Every agent we suggest has a strong track record of success. Schedule a free consultation to learn more.

Tamper evident bags have become a common security measure in many food and beverage products to prevent contamination and spillage and maintain the integrity of the finished product. Tamper-resistant seals, rings and pouches ensure the quality and freshness of the product, and provide manufacturers with a degree of security. The complete tampering technology in the tamper evident bag conveys the safety and reliability of the finished product, but production errors may occur during the final sealing stage of the primary packaging, affecting the safety seal. The normal wear and tear of production machines makes it almost impossible to make 100% defect-free products, so quality control and inspection processes are essential to prevent these products from leaving the production line and entering the market.

After checking the product's fill level and placement of the lid, the vision system checks the seal to verify the integrity of the seal, and specifically verifies that tamper resistant bags and security seals are used. For bottles with safety rings, the vision system verifies that the rings have not been lifted and have been properly twisted.

A vision inspection system with pattern matching technology quickly locates and verifies the integrity of tamper-resistant seals for accurate and repeatable inspections. Detect edges of security seals and measure their height, width, relative position, and gap size, and compare them with set limits. Tamper-resistant seal dimensions that do not meet the programmed limits will be rejected.

As one of the tamper evident tape suppliers, our company has shown its worth in this very competitive sector due to theefforts and rigorous inputs from the professionals who have contributed immensely to its growth. These people have a very vast knowledge of the market trends and scenario allowing them gets reliable link-ups with vendors for us. Also, we have some of the best-qualified quality and packaging experts, who have taken responsibility to ensure we make zero-defect products as well as safe and on-timedelivery of the packaging materials.

The liner hanger assembly is a special cementing tool for tieback operation.

Tieback equipment allows existing liners with a receptacle to be extended to the surface or farther up hole, and provides a high-pressure seal at the top of a cemented or uncemented liner. TIW offers variety of tieback seal nipples and tieback packers to accommodate liner top extension and remedial operations.

Tieback Procedures of Hydraulic Liner Hanger Tie-Back Assembly

1. Preparation before casing

Measure and drift the casings carefully and clean all the threads.

Calculate the kelly-up of the casing (the particular part of the last casing which is above the rotary table) and arrange the casing string.

Prepare several casings, which are approximately 0.5m shorter than the others and convenient for kelly-up calibration. (The actual kelly-up is not equal to the calculated value due to measurement error and the remaining threads of the casings.)

1. Polishing the polished bore receptacle

Connect the milling shoe and trip in. Polish the inner surface of the polished bore receptacle, make sure there is no debris.

Note the depth of the milling shoe when it reaches the top of the seal assembly (judge from the changes on pressure and WOB). Then lift the drill string for 1m.

Use a drilling rate of 40～50rpm and a normal flow rate. Slowly lower the drill string. Polish the inner surface of the polished bore receptacle twice or three times. Each time polish 3～4min. During the last polishing, apply an additional load of 2～3t when the torque suddenly increases (the milling shoe reaches the top of the seal assembly) during the last polishing. Polish for another 2~3min and note the depth of the milling shoe, which is an important clue for the casing setting depth.

Circulate with high flow rate for 5min.

Trip out and check the milling shoe. If there is a circle of polished trace and the diameter is equal to the I.D. of the left thread on the seal assembly, then the milling shoe have reached the bottom of the polished bore receptacle.

Features of Hydraulic Liner Hanger Tie-Back Assembly

With the guide shoe and circulate bore, it can stab into polished bore receptacle before cementing, more convenient than conventional cementing which pumps down cement before stabbing.

With its streamline shape, the guide shoe can stab into polished bore receptacle easily.

The Tieback Seal Assembly with three stacks of molyglass seal is designed for high-pressure and high-temperature liner tieback completions. Available in seal length is 1.2m.

Technical Parameters of Hydraulic Liner Hanger Tie-Back Assembly

Saigao Group specializing in design, research and development, processing and manufacturing, sales and export of machinery equipment, with leading products comprising various kind of mud pumps, down-hole motors, any kinds of screen pipes, cementing tools as well as any kinds of wellhead equipment. Just contact us!

ASTM A500 Steel Pipe

ASTM A500 is the standard specification for circular, square, and rectangular tubes of cold-formed welded and seamless carbon steel structures. ASTM A500 is the most common specification for Hollow Structural Sections in North America. The correct way to specify the circular HSS section is to represent the outer diameter in decimal inches to three decimal places (i.e., 5.563 x 0.250) according to the nominal wall thickness.

Why A500 Steel Pipe?

Since ASTM A500 is a structural specification, circular high-speed steel produced according to this specification is suitable for structural applications and general construction purposes. ASTM A53 is a pipe specification for mechanical and pressure applications.

The specified yield strength of  A500 Grade b Pipe(the most commonly available grade) is 46 ksi.  The specified yield strength of A53 Grade B is 35 ksi.  Yield strength increased by more than 30%.  Therefore, the strength to weight ratio of A500 circular HSS is greater than that of A53 pipe. So, if you do the job with round HSS, you need less steel, by weight, to do the job—the lighter it is, the lower the cost.

The tolerances of A500 are tighter than those of A53, so the HSS of the A500 circle has higher quality and less variability.

Round HSS has a superior surface finish and is not as lacquered as normal A53 tubes.  Since this lacquer coating needs to be removed from the A53 pipe to accommodate welding and painting, so this can save money and time.

A53 pipe is available in standard pipe sizes only.  Round HSS is available in various sizes and wall thicknesses. Just look at the 14th edition of the AISC Steel Construction Manual and see how many pages there are of circular HSS with A53 tubes.

Last but not the least, the ASTM A53 Specification requires testing (i.e., pressure testing) for structural applications. This additional testing adds unnecessary additional costs.

Astm A500 Grade C Pipe Applications

All steel structures have their pros and cons including tructural supports, building columns, highway signs, oil field services and communication towers, to name a few. But ultimately ASTM A500 is a better choice when you need a round profile.

We encourage architects, fabricators, structural engineers and contractors to read up on ASTM A500 and visit The Steel Tube Institute's website because it offers a wide variety of technical publications, load tables and design aids.

In its fight against counterfeit and inferior medicines, the EU responded with the anti-counterfeiting directive 2011/62 / EU. As of February 9, 2019, with few exceptions, prescription drugs can only be marketed with a security label and serial number. For pharmaceutical companies, implementing the EU Directive is a difficult task. According to the estimates of pharmaceutical manufacturers, the cost of implementing each EU pharmaceutical production line is hundreds of thousands of Euros.

Tamper Evident Label on Tamper Evident Bag

In order to be able to continue using the existing tamper evident bag, the use of tamper-resistant labels is an interesting option from a cost-effective point of view. Dedicated tamper-resistant labels have reliable packaging integrity, quality and safety guarantees. In addition to monitoring measures, this tamper-resistant label also means protection for consumers when buying medicines. At present, the materials used for tamper evident labels on tamper evident bags are usually some special materials, such as the so-called "fragile labels". The materials used for fragile labels are almost completely broken in every attempt to open. Or the so-called "Void Unmask" tag leaves irreversible handwriting when trying to unpack it. And these special materials have their own different shortcomings and shortcomings in the high-speed pharmaceutical production line, which means that a large amount of additional financial expenditure is required.

Label glue is the decisive factor

From an economic and technical point of view, the most reasonable labels are conventional rectangular or circular labels. What plays a decisive role in these labels is their pressure-sensitive adhesive. The heat-sensitive adhesive must have good water resistance and good resistance to hot air and various thinners. Only by possessing these properties can we guarantee that the label will not be easily peeled off from the colorful folding box without damaging the label itself or leaving visible signs of disassembly on the pill box. There is a pressure-sensitive adhesive R & D department dedicated to meeting various challenges. The pressure-sensitive adhesive developed and produced by this department can be used on various tamper evident bag surfaces. ZHANJIANG FENGQI PLASTIC PRODUCT CO., LTD not only develops and produces sealed labels, but also provides labeling machines for integration into packaging production lines.

As one of the packing list envelopes manufacturers, our company has shown its worth in this very competitive sector due to theefforts and rigorous inputs from the professionals who have contributed immensely to its growth. These people have a very vast knowledge of the market trends and scenario allowing them gets reliable link-ups with vendors for us. Also, we have some of the best-qualified quality and packaging experts, who have taken responsibility to ensure we make zero-defect products as well as safe and on-timedelivery of the packaging materials.

Hydraulic Liner Hanger Polished Bore Receptacle Mated with tie-back assembly, it can tieback the liner to the top of well and act as efficiency sealing. The polished bore receptacle (PRB) is a highly machined component with a polished bore.

Features of polished bore receptacle liner hanger

High quality surface finish on the inner seal bore for optimum sealing property.

The top end is chamfered for easy entry.

Manufactured to strict roundness and wall thickness tolerances, giving optimum burst and collapse pressure ratings.

Technical Parameters of Hydraulic Liner Hanger Polished Bore Receptacle

Saigao Group specializing in design, research and development, processing and manufacturing, sales and export of machinery equipment, with leading products comprising various kind of mud pumps, down-hole motors, any kinds of screen pipes, cementing tools as well as any kinds of wellhead equipment. Just contact us!

It seems that most modern people do not go to physical stores to buy goods. They choose online shopping. Because more information about product types can be found only by searching in the Internet and more options in terms of price can be chosen, it has promoted the prevalence of online shopping. Because of this, the courier has a lot of boxes to deal with every day. Sometimes some goods will inevitably be squeezed. If you want to solve this troublesome thing, the security bag must be used.

What is a security bag?

In fact, after the security bag has been improved by various production techniques, its equipment operation speed and production efficiency have been greatly improved. In addition, it can be found that the production of security bags has also added some automated procedures in colleges and universities, which has avoided some errors caused by human operations. At this time, it can bring more high-quality products to merchants, so we need to understand some of its uses.

Basic uses and advantages of security bags

1. Anti-counterfeiting function

The most important function item of the security bag is its anti-counterfeiting effect. For a long time, all kinds of sealed bags have been in a basically suitable process. It is basically impossible to achieve related control and real-time tracking. Assuming that the product is repackaged or theft occurs during transportation, the interests of merchants and consumers will be directly damaged in the end. At this time, if the security bag can be used, then there is no need to worry about such problems.

2. Multiple protection

The development of security bags to this stage has basically used PE waterproof materials. This material has many advantages after a series of special treatments and steps. For example, it can easily be waterproof and impervious. In the process of transportation, if it is because of various unexpected external factors that affect the goods, it will definitely harm the interests of consumers and the express delivery company. However, the multiple protection of the safety deposit bag can enable the items to be protected with high quality during transportation.

3. Good sealing

Because of the material of this bag, it is definitely not easy to be damaged during transportation. After all, the bags are made together with a variety of chemical materials, so basically no damage will occur during the transfer process. The outside of the bag will be fixed with tape after being affixed, so it will not drop during transportation. In addition, the airtightness of the bag will be many times better than those of the previous express without using the bag, which can better protect the items purchased by the customer.

In fact, in addition to the above functions and uses, the security bag also has features, of course, it also has other advantages. For example, the sealing performance of the multilayer structure is particularly good. In addition, it also has an oil film protective layer, so it can achieve the purpose of waterproofing. In addition, its anti-counterfeiting characteristics are also unique, so its security performance is good. Its technology is powerful, and it has a unique feature that cannot be copied, so many businesses are willing to adopt it.

As one of the tamper proof bags manufacturers, our company has shown its worth in this very competitive sector due to theefforts and rigorous inputs from the professionals who have contributed immensely to its growth. These people have a very vast knowledge of the market trends and scenario allowing them gets reliable link-ups with vendors for us. Also, we have some of the best-qualified quality and packaging experts, who have taken responsibility to ensure we make zero-defect products as well as safe and on-timedelivery of the packaging materials.

With the development of technology, teachers have gradually discovered that the possibility of paper sealed bags being copied is too great. Therefore, the anti-counterfeit sealed security bag has become a test paper sealed bag favored by the school. A security bag, as the name suggests, is a bag with protection features. From this we can probably guess that the security bag of the test paper has the function of protecting the contents of the package from being exchanged and maintaining its uniqueness!

Its secret protection of objects is mainly reflected in the use of anti-counterfeiting technology.

The main anti-counterfeiting has the following types:

1. Self-adhesive sealing——Remove the reserved words

It uses a self-adhesive anti-counterfeiting seal, which has strong adhesion. Glue can withstand high and low temperatures, and it is not easy to be opened illegally. Once the security anti-counterfeiting tape is opened and the reserved words are opened, the anti-counterfeiting characters, characters and patterns will appear.

2. Temperature-changeable ink——Multiple anti-counterfeiting

The temperature-changeable ink anti-counterfeiting part will turn red when it encounters external high temperature up to 65 ° C, and cannot be recovered. In addition, when the ink encounters water, the ink will be dissolved by the water.

3. Unique barcode——Easy query

Each bag can be printed with a unique serial number and barcode. The unique bar code is easy to tear, used to track products and stubs, and can track goods by ticket number.

In addition to the application of anti-counterfeiting technology, items can be protected from being exchanged before being opened. In addition, the bag has the functions of anti-breakage and strong adhesion to protect the internal items from being damaged.

Anti-breakage: High-mild material can prevent tearing and scratching, easy to fill, and seal quickly.

Strong tackiness: The self-adhesive anti-counterfeiting seal has strong tackiness, the glue can withstand high and low temperature, and it is not easy to be opened illegally.

Waterproof / liquid-resistant: It uses high-grade PE / PO material, and the surface layer effectively prevents water droplets and liquid penetration.

As one of the security packaging tape suppliers, our company has shown its worth in this very competitive sector due to theefforts and rigorous inputs from the professionals who have contributed immensely to its growth. These people have a very vast knowledge of the market trends and scenario allowing them gets reliable link-ups with vendors for us. Also, we have some of the best-qualified quality and packaging experts, who have taken responsibility to ensure we make zero-defect products as well as safe and on-timedelivery of the packaging materials.

BW series three cylinder reciprocating pump is widely used in mining, drilling, coal, railway, highway, water conservancy and hydropower,bridges, high-rise buildings, foundation reinforcement work.

Advanced product design,reasonable structure,high pressure,flow,multi-file variable, energy saving, light volume, efficiency, plant life, sage operation, easy maintenance.

The BW-160/10 grouting pump consists of pump head, pump body, clutch, protective cover, belt and power drive, frame, air chamber and pressure gauge device, water filter and other components. The power generated by the electric motor is transmitted to the pump body through the belt and the clutch, and becomes a linear reciprocating motion of the piston through the rotary motion of the crankshaft connecting rod, thereby controlling the opening and closing of the steel ball in the pump head to perform the suction and discharge work.

The pump head is the main component of the grouting pump. It consists of three single-acting hydraulic cylinders connected in parallel with a common suction and discharge chamber. The components on both sides of the suction and discharge chambers can be replaced as needed.

The pump body is the main component of the power end of the grouting pump. The main function is to realize the shifting and power transmission of the mud pump, the gear shifting mechanism, the crankshaft linkage mechanism, the piston, the crosshead, etc., which can convert the rotary motion of the crankshaft into the straight line of the piston. Reciprocating motion.

The clutch is a device for engaging or separating the power of the grouting pump, or when the power is not stopped and the mud pump needs to be operated at a shifting or no-loading, the clutch disengagement can be realized. When the mud pump is overloaded, the friction plate can be used to protect the pump from overload. The engagement or disengagement of the clutch is controlled by the clutch handle, the handle is disengaged from the clutch, and the handle is engaged downward.

Features of BW160/10 Horizontal Three Cylinder Reciprocating Single Acting Piston Pump:

BW-160/10 mud pump can be used for geological core drilling, chemical liquid transportation, mine drainage and soft foundation grouting;

With four different flow rates and pressures, the range of variation is large, and the scope of application is wide;

Compact structure, light weight, small size and beautiful appearance, which can be driven by hydraulic motor, motor and diesel engine;

Standardization of parts and components, high degree of generalization, convenient maintenance and operation;

Consumable parts have long service life and high reliability.

Saigao Group specializing in design, research and development, processing and manufacturing, sales and export of machinery equipment, with leading products comprising various kind of mud pumps, down-hole motors, any kinds of screen pipes, cementing tools as well as any kinds of wellhead equipment. Just contact us!

Ordinary bubble bags are common bubble bags, which are mainly used for packaging products to prevent collisions between products. At present, bubble bags are mainly used for postal packaging of products. Pink anti-static bubble bag with shock-absorbing bubble film. There are countless small bubbles in the bubble film, so it is light and flexible, and has the functions of sound insulation, shock resistance, and scratch resistance. Bubble film is widely used in shock-resistant cushioning, protective packaging in electronics, meters, ceramics, crafts, household appliances, auto dealers, kitchens, furniture, hardware tools, glass products and precision instruments.

Customized Kraft Bubble Bags:

Material: Kraft paper / PE;

Structure: outer layer is kraft paper (white, yellow), lined with bubble film;

Function: the surface is flat and easy to write; different patterns, trademarks and words can be printed according to customer requirements without infringing on the intellectual property rights of others; it has buffering and anti-vibration to prevent items from being damaged by pressure, bumps and drops; It does not use any adhesive between the layers of material, completely non-toxic and environmentally friendly; it has a self-adhesive strip design for the envelope mouth, which is safe and convenient;

Recommended use: mailing discs, magnetic tapes, electronic components, integrated circuit boards, optical lenses, books, documents, photo frames, gifts, clocks and other items.

The kinds of Kraft paper bubble bags

1. Golden kraft paper bubble bag is also called yellow kraft paper bubble bag.
2. The color of natural kraft paper bubble bag is kraft tone.
3. White kraft paper compound bubble bag.

Application and advantages of kraft paper compound bubble film envelope bag: The outer layer of kraft paper compound bubble envelope bag is kraft paper, and the inner layer is lined with air bubbles. It is tough and shockproof for better protection. Its interior is buffered with bubbles, which is easy to package and has a beautiful appearance.

There are also aluminized film bubble envelopes, composite film bubble envelopes, co-extruded film bubble envelopes and so on. The pearl film bubble envelope is a commonly used material with a smooth surface. Compared with ordinary express bags, bubble envelopes have a layer of bubble film, which plays a role of shock protection.

As one of the tamper evident tape suppliers, our company has shown its worth in this very competitive sector due to theefforts and rigorous inputs from the professionals who have contributed immensely to its growth. These people have a very vast knowledge of the market trends and scenario allowing them gets reliable link-ups with vendors for us. Also, we have some of the best-qualified quality and packaging experts, who have taken responsibility to ensure we make zero-defect products as well as safe and on-timedelivery of the packaging materials.

The fracturing tree is a wellhead equipment used to direct and control oil & gas from the well. It is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well, and other types of wells. Christmas trees supplied by Finemade are used in oil exploration and production in surface. Christmas trees on surface wells are also known as surface trees, as they connect to the wellhead that is visible on the surface of a well.

Features of Fracturing Tree:

It is input into fracturing head through several fracturing manifold. It is input into fracturing gate valve to perform fracturing production. It controls medium access through fracturing gate valve switch. Now, the fracturing tree manufactured by Douson has maximum drift of 7-1/16"and maximum pressure of 20000psi. The main part of our fracturing is fracturing valve which has acquired patent for national invention and patent for utility model. Fracturing technology adopted by Douson is internationally advanced technology.

Application of frac tree:

After the oil well production reaches a certain stage, the production capacity and permeability are reduced. In order to enhance the oil discharge capacity and increase the oil well production, people have invented the fracturing technology. The fracturing method is divided into two types: hydraulic fracturing and high-energy gas fracturing. Hydraulic fracturing is to inject high-speed fluid into the well by the high-pressure pump trucks on the ground. The high pressure of the bottom of the well is used to break the cracks in the reservoir rock. In order to prevent the pump from stopping, the pressure drops and the cracks close themselves. In the injected liquid after the rupture of the formation, the sand is mixed with the sand several times larger than the density of the formation, and enters the crack together with the fluid, and stays in the crack forever. The crack is open, which improves the oil flow environment for a long time. The current hydraulic fracturing technology is very mature, and the oil well stimulation effect is obvious, and it has already become the common technology that people prefer. Especially for the oil flow channel is very small, that is, the oil layer with a lower permeability has a particularly strong effect.

Technical Specifications of frac tree wellhead:

Main Drift: 4-1/16"、5-1/16"、7-1/16"

Working Pressure:10000psi、15000psi、20000psi

Temperature Level: KU

Material Class: AA、BB、CC、DD、EE、FF、HH

Specification Level: PSL1~PSL4

Performance Level: PR1~PR2

Saigao Group specializing in design, research and development, processing and manufacturing, sales and export of machinery equipment, with leading products comprising various kind of mud pumps, down-hole motors, any kinds of screen pipes, cementing tools as well as any kinds of wellhead equipment. Just contact us!

In recent years, due to the crazy development of the e-commerce industry, a series of industries have also been driven by the crazy development. I believe that the moment that friends who like online shopping most enjoy is the moment of unpacking. For some products purchased online, bubble bags can be said to be the best packaging method. For example, the digital products, clothing, porcelain, and products with bottles and cans that we usually use are packed in bubble bags. But with the continuous maturity of bubble bag packaging industry, bubble bags are divided into many sub-areas.

Ordinary transparent bubble bag is our most commonly used bubble bag. When this bubble bag is still a bubble film, you can directly use transparent bubble films with a width of 1 meter, 1.2 meters, 1.4 meters and more to pack things. It's simple, convenient and fast. And you can use this bubble film to produce a simple flat pocket to hold many small things.

The characteristics of ordinary bubble bags have good shock absorption, light weight, good transparency, and elasticity. It has sound insulation, shock resistance, abrasion resistance and impact resistance. It is non-toxic, odorless, moisture-proof, and corrosion-resistant.

Arch extruded film bubble bag is one of the most used in the express delivery industry. The arched film bubble bag can be said to be born specifically for the express delivery industry. Its bag samples can be divided into flat pockets, envelope bags and so on. Its hue is mainly divided into natural colors, yellow (taurus) colors, and white. It can print a variety of shades on the surface. It mainly plays the role of anti-shock, waterproof, anti-pressure and so on. All of these features are designed from the point of view of the express delivery industry.

The pearl film bubble mailers is actually similar to the arched film bubble bag, and these two bags are different in terms of production materials, and their functions are basically the same. In our opinion, the only difference is that one is higher-end and the other is more ordinary.

FENGQI provides best bubble mailers, welcome to consult.

As one of the packing list envelopes manufacturers, our company has shown its worth in this very competitive sector due to theefforts and rigorous inputs from the professionals who have contributed immensely to its growth. These people have a very vast knowledge of the market trends and scenario allowing them gets reliable link-ups with vendors for us. Also, we have some of the best-qualified quality and packaging experts, who have taken responsibility to ensure we make zero-defect products as well as safe and on-timedelivery of the packaging materials.

FREE tutorials and downloadables to help you pass the time away at home. Lots of fun for the whole family!

https://www.bettesmakes.com/quarantine/

The fishing tool is the most widely used tool for overhauling oil and water wells. There are many types of fishing tools in drilling. According to the types of falling objects in the well, they can be divided into five categories: spear tools, overshot tools, junk basket, hook fishing tools, and cutter tools.

Saigao Group specializing in design, research and development, processing and manufacturing, sales and export of machinery equipment, with leading products comprising various kind of mud pumps, down-hole motors, any kinds of screen pipes, cementing tools as well as any kinds of wellhead equipment. Just contact us!

近年来，申请 美国大学本科转学 是越来越多学生迈入美国名校的捷径。美国大学本科转学体系非常成熟和完善，如果同学们未能直接进入梦校读书，那么可以在任意学校接受两年的通识教育，拿到好的成绩后再转入更好的大学完成剩下两年的本科课程。

美国大学本科转学适合人群

美国大学本科转学 体系非常灵活，一般来说，如果你属于以下几种类型之一的学生，都有机会转学到美国名校完成本科学业：

因高考录取结果不理想，未能进入国内心仪大学的高三毕业生

国内本科在读，对所选专业不满意，或者是想转学体验美国高等教育的学生

美国社区大学在读，想转到四年制大学继续完成学业，取得学士学位的学生

美国四年制大学在读，想转到更心仪的院校继续完成学业

如果不确定自己能否申请 美国大学本科转学 ，可以咨询专业机构老师。求真老师熟悉美国大学转学体系，能为你量身定做最适合你的本科转学规划。

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美国大学本科转学三大步骤

1.明确自我定位：为什么要选择美国大学本科转学？你对未来有什么规划？你目前的硬件和软实力在转学申请中是否有优势？对于有意向申请美国大学本科转学的同学来说，这些都是首先需要考虑清楚的问题。具体来说，同学们在转学之前需要了解自己的GPA情况、SAT、英语语言水平、目标专业方向和职业规划等方面，进行准确的自我定位。

2.了解目标院校和专业：明确了解目标院校和专业后，一定要上学校官网了解课程设置、专业要求、学分转换机制等问题。转学本质上是转换学分，每个学校的要求各有差异。因此，同学们需要根据目标院校和专业的要求提前规划好自己的课程，并准备相关的课程描述材料。

3.把握转学时间：大学四年转学的风险和要求各不相同。以目前在美国四年制大学在读的这种情况为例，最理想的时间是大二提交转学申请，大三转入新学校就读。一般而言，这样能保证学分转换最大化，并且学生不再需要提交SAT成绩。总的来说，转学需要提前规划，预留出充足的时间去准备课程安排、文书润色、背景提升等。同时需要注意各校转学重要时间节点，以免错过各种截止日期。

求真寄语

如何选校、规划以及保持良好的GPA，是每位有意向转学的同学需要认真思考的问题。求真教育作为扎根美国十数年，服务万千留学生的服务机构，深谙美国转学体系。只要你有需要，求真教育愿与你同在，助你逆袭名校！文章来源：https://indeededu.com/transfer-usa-3/

美国社区大学转学

美国社区大学转学 是美国高等教育体系的重要组成部分。中国的学生和家长不了解美国社区大学，误以为美国社区大学类似国内的职业院校。其实 美国社区大学 在美国当地是非常受欢迎的，有50% 以上的学生在高中毕业后都选择到社区大学继续学习。

美国社区大学

社区大学（Community College），通常又被称作社区学院，是一种提供两年制学位的高等教育机构。社大主要提供美国四年制大学前两年的通识学习课程与教育基础，完成社区大学学业可获得副学士学位（Associate Degree）。美国社区大学鼓励学生转学，为学生们提供各种教育支持、制度支持、服务支持，转学到四年制大学继续完成学士学位（Bachelor Degree）。

社区大学与许多顶尖四年制大学有转学协议（TAG，Transfer Admission Guarantee，即转学入学保证），是许多学生进入名校的重要跳板，只要学生修满学分，在校成绩也达到指定要求，即可顺利转入有转学协议的学校。近年来收益于TAG政策的中国学生呈直线上升趋势，越来越多的中国家长向求真教育咨询美国社区大学。

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W同学案例

W同学在广东一所普通高中，跟众多高考生一样，寒窗苦读数十载，奈何成绩总是上不去。在高考这条独木桥面前，众多高考生犹如万马奔腾，千军抢过独木桥。在如此激烈的竞争下，W同学心有余而力不足，语文成绩总是提不上去。高考成绩出来的时候，语文成绩还是严重拖后腿，最终只能去到一个大专院校。W同学心有不甘，努力了还是这样的结果，但又无济于事。在苦闷之际，W同学萌生了出国留学的想法。他的这个想法也得到了父母的支持。

对比了众多的留学机构后，W同学了选择了求真教育。求真教育的老师根据W同学的情况，认为W同学的高考后留学，不想浪费一年时间去准备托福、AP成绩，又想去到美国名校读书。那么走社区大学转学这条弯道超车的路最合适了。

社区大学的录取门槛低，以W同学目前的成绩和GPA分数能去到不错的社区大学。选择社大转学这条路的关键在于社大两年的课程规划，这决定了两年后能否顺利转入名校。因为四年制大学在接受转学生的时候，对学生的选课、专业课都有不同的要求。

求真教育老师对W同学进行了选课指导，科学合理地选课，可以让W同学拿到高GPA，也能最大限度地将已修学分转入四年制大学。在求真老师的规划下，W同学大二结束的时候申请到了加州大学洛杉矶分校。

求真寄语

W同学一家对于这个申请结果感到非常满意，在国内上不了一个好大学，在求真老师的科学规划下，完美逆袭顺利进入美国名校。W同学的这华丽转身，绝不是偶然，除了他自身的努力外，还得益于求真老师的合理规划。如果你也跟W同学一样想弯道超车进入美国名校，就快来联系我们吧。更多留学资讯，尽在求真。文章来源：https://indeededu.com/ccusa-2/