China Professional API 11b 7/8 Class Sm Sucker Rod Coupling cohesion and coupling

Product Description

 

Product Description

Class T and Class SM coupling for sucker rods are manufactured as per API Specification 11B. For the thread cutting, we are using cold form rolled by displacing rather than by removing of material for making the coupling thread. The thread rolling cutting results in a compressive stress at the root of the thread, giving maximum strength to the traditional weak point of cut-thread couplings.

Class T coupling is using AISI 5140 to manufacture.The coupling is coated using phosphate chemical treatment or black oxide on customer’s request.For Class SM coupling, the spray metal is a specification hardening process and is applied on the base metal.

The couplings are available in full size, slim hole and over size.Also, combination couplings are available for different diameters (sub-coupling) for both Class T and Class SM couplings.

We recommend changing sucker rod couplings after 3 make-ups, provided the connection threads have been inspected and deemed acceptable for reuse. 

Grade T Sucker Rod Couplings

These couplings are made up of 5140 alloy steel and are very resistant to hydrogen embrittlement.

 

Grade SM CO-HARD Sucker Rod Couplings

These couplings are made up of 5140 alloy steel and are very resistant to hydrogen embrittlement. In order to yield a strong metallurgical CZPT between the base metal of the coupling and the spray metal coating. Advanced thermal spraying technology is adopted to melt Ni alloy and other high wear-resisting materials on the blank surface of the collar after high temperature flame spraying, so as to reduce the friction coefficient between the anti-wear collar and the oil pipe to 0.01, which is an effective combination of high hardness and low friction, thus improving the service life of the rod and pipe in oil exploitation.

Product Application

Class T and Class SM coupling for sucker rods are manufactured as per API Specification 11B. For the thread cutting, we are using cold form rolled by displacing rather than by removing of material for making the coupling thread. The thread rolling cutting results in a compressive stress at the root of the thread, giving maximum strength to the traditional weak point of cut-thread couplings.

The coupling is coated using phosphate chemical treatment or black oxide on customer’s request.For Class SM coupling, the spray metal is a specification hardening process and is applied on the base metal.

The couplings are available in full size, slim hole and over size.Also, combination couplings are available for different diameters (sub-coupling) for both Class T and Class SM couplings.

We recommend changing sucker rod couplings after 3 make-ups, provided the connection threads have been inspected and deemed acceptable for reuse. 

Features

1. Designed and manufactured according to API spec 11B.
2. The couplings are manufactured in grades SM and DES.
3. Increased wear and corrosion resistance.
4. Surface treatment includes black coating, phosphating or as per the customers requirement.

Technical parameter

We recommend changing sucker rod couplings after 3 make-ups, provided the connection threads have been inspected and deemed acceptable for reuse. 
 

                Chemical Properties, %: Class T Coupling

Steel

AISI    5140

C

0.37~0.44

Si

0.17~0.37

Mn

0.50~0.80

P

≤0.040

S

≤0.040

  Spray Metal Coating Chemical  Properties, %: Class SM Coupling

Carbon

0.50~1.00

Silicon

3.50~5.50

Phosphorus

0.00~0.02

Sulfur

0.00~0.02

Chromium

12.00~18.00

Boron

2.50~4.50

Iron

3.00~5.50

Cobalt

0.00~0.10

Titanium

0.00~0.05

Aluminum

0.00~0.05

Zirconium

0.00~0.05

Nickel

Balance

OD

Coupling OD

Length

Wrench length 

Wrench width

mm

in

(mm- inch)

(mm- inch)

mm

mm

16

5/8

38.1(1.500)

101.6(4.000)

31.8

34.9

19

3/4

41.3(1.625)

101.6(4.000)

31.8

38.1

22

7/8

46.0(1.812)

101.6(4.000)

31.8

41.3

25

1

55.6(2.187)

101.6(4.000)

31.8

47.6

29

1 1/8

60.3(2.375)

114.3(4.500)

41.3

53.9

Product Photos

 

Company Profile

ZheJiang LIGHT FIR MACHINERY Co., Ltd(LFM) is located in CZPT Oilfield, ZheJiang Province, China.

LFM is a physical enterprise integrating mechanical processing and manufacturing and sales of special petroleum equipment. We have 2 cooperative production bases, which can produce OCTG and various accessories and tools.

The products we can provide include: Rig accessories and tools, OCTG, LinePipe, FRP Line Pipe, Artificial Lifting Equipment, Wellhead equipment, Valves, Pipe fittings, BOP, Downhole Tools etc. According to standards: API, ASTM, ASME, Ghost etc.

Our leading products: Casing & Tubing(API 5CT series, Tenaris Series), Valves(Gate Valve, Ball Valve, Check Valve, Globe Valve, Choke Valve; API 6A series, API 6D series, API 600 Series, and General Use Valves); BOP and BOP Spare parts; Drilling Tools etc.

LFM is also a professional supplier of WATER TREATMENT EQUIPMENT. We work together with the professional WATER TREATMENT EQUIPMENT manufacturer in China. The products we supply have been widely recognized by customers.

Our aim is “Use our professional services to make your business easier”. Therefore, we devote to providing customers with integrated solutions and strive to become your one-stop procurement platform in China.
 

Certifications

 

Packaging & Shipping

 


FAQ

Q1: What’s your packing?
A:  Regular packing.

Q2: What’s your delivery?
A:  Normally, about 30-45 days.

Q3:  What are the shipping methods?
A: Ocean shipment to the port near from you; Air shipment to the shipment near from your company; Door to door service by  international express.

Q4:  What about the payment options?
 A: In general, we accept T/T. 

Q5:  When can I get the price?
A: We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price,please call us or tell us in  your  email so that we will detail with your inquiry priority.

 

After-sales Service: 7X24
Warranty: 12months
Manufacturing Process: Forging
Surface Treatment: Polishing
Operation Pressure: No
Material: Alloy
Samples:
US$ 5/Joint
1 Joint(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

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Understanding the Different Types of Couplings

A coupling is a device that joins two rotating shafts together. It transmits power from one to the other and is designed to allow some amount of end-movement and misalignment. It is a simple mechanism that is extremely common in many industries. Learn more about couplings in this article.

Flexible coupling

When choosing the correct flexible coupling for your application, there are several factors to consider. One of the most important factors is backlash, which is the amount of rotational play introduced by moving parts. Other factors to consider include lubrication and accessibility for maintenance. Choosing the right flexible coupling can be challenging, but it is possible to find the right fit for your specific application.
A flexible coupling is an excellent choice for applications that require high alignment accuracy, which is essential for reliable system performance. These couplings can compensate for angular and parallel misalignment, ensuring proper positioning between the driving and driven shafts. In addition, flexible couplings are more affordable than most traditional couplings.
The most common flexible coupling is the elastomeric type, which uses a resilient material to transmit torque. These couplings can be made of plastic or rubber. In either case, they can be relatively lightweight compared to other types of couplings. Elastomeric couplings can also be used for high-speed applications.
Another important factor to consider when selecting the best Flexible Coupling is the pipe you’re connecting. Some couplings are easier to install than others, and some even have tapered edges to make them slide easily on the pipe. Regardless of the choice you make, it’s crucial to remember that proper installation is critical for reliability and safety.

CZPT coupling

An CZPT coupling is a flexible, mechanical coupling that features a high degree of angular misalignment and eccentricity. They are available in different lengths, with MOL being the longest. They are ideal for applications that involve high parallel misalignment, limited assembly access, electrical insulation, and other conditions.
CZPT couplings are a versatile type of coupling, and they are often used to connect parallel shafts. They work by transmitting torque from one to the other using the same speed and rotation mechanism. They are available in various materials, including aluminum, brass, and polymers. In addition, they can work under high temperatures.
One of the main benefits of using an CZPT coupling is the fact that it does not require the use of a gearbox. These couplings are flexible, and their design allows them to cope with misalignment problems that may occur in power transmission applications. They are also able to absorb shock.
Another advantage of CZPT couplings is that they are suitable for systems with low-to-medium amounts of shaft misalignment. Because their friction is limited to the surface of the hubs, they are able to accommodate low bearing loads. CZPT couplings can also be used in systems with limited shaft access, since the disks are easily removed.

Clamped coupling

Clamped couplings are designed to provide a high-strength connection between two objects. A standard coupling has two parts: a nipple and a clamp sleeve. Each part is designed in such a way as to cooperate with each other. The sleeve and clamp are made of rubber. A reinforcing braid is often used to protect the exposed steel braid from rusting.
PIC Design provides a wide variety of standard clamping couplings for many different industries. These include medical, dental, military, laboratory, and precision industrial control equipment. They have a simple design that makes them ideal for these applications. Clamped couplings are also available for custom manufacturing. These couplings are available in metric, inch, and Metric.
The most common type of clamp coupling is a hose clamp. This type of coupling is used to connect two hoses or piping units. It consists of two conical binding sleeves that fit into the ends of the two parts. The coupling is then tightened with a screwdriver. It’s a versatile coupling because it allows two piping units or hoses to be joined together.
Another type of clamp coupling is the two-piece clamp coupling. The two-piece design allows for a quick and easy installation. Unlike other types of couplings, the clamp coupling is not necessary to remove the bearings before installing it. Its keyway is designed with shims in place so that it fits over the shaft. These couplings are available in different sizes, and they are made of steel or dutile iron.
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Helicoidal coupling

Helicoidal coupling is a form of nonlinear coupling between two molecules. It occurs when the molecules in a double helix are subjected to oscillations. These oscillations can occur either in the right or left-handed direction. These oscillations are called solitons. Helicoidal coupling can provide quantitative or qualitative support to a structure, such as an electron.

Split Muff coupling

The Split-Muff Coupling market report provides detailed market analysis and key insights. The study covers the market size, segmentation, growth and sales forecast. It also examines key factors driving the market growth and limiting its development. The report also covers current trends and vendor landscapes. Therefore, you can get a deep understanding of the Split-Muff Coupling industry and make the right business decisions.
The report also provides data on the competitive landscape and the latest product and technology innovations. It also provides information on market size, production and income. It also covers the impact of the COVID-19 regulations. The market report is a valuable resource for companies looking to expand their businesses, or to improve existing ones.
In terms of application, Split-Muff Couplings can be used in light to medium duty applications. They are shaped like a semi-cylindrical disc that fits over a shaft. Both parts are threaded for assembly and disassembly. It can be disassembled easily and quickly, and can be used for medium to heavy-duty applications with moderate speeds.
Split Muff couplings are the most popular type of couplings for transferring wet and abrasive materials. Their flanged end fits on most major brands of smooth material muff hoses. In addition, this type of coupling is corrosion-resistant and easy to install. It also does not require any adjustments to the drive shaft’s position.
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Flexible beam coupling

The Flexible beam coupling is one of the most popular types of couplings in the industry. It is comprised of two sets of parallel coils separated by a solid member, and it offers a wide range of torsional stiffness. These couplings are made of aluminum alloy or stainless steel. They offer excellent flexibility and are less expensive than many other types of couplings. They also require zero maintenance and can tolerate shaft misalignment.
Beam couplings are categorized into two types: helical and axial. The former is characterized by a high degree of flexibility, while the latter is used to compensate for higher misalignment. Both types are suitable for small torque applications and are available in a wide range of shaft sizes.
Flexible beam couplings are available in metric and US sizes, and feature a variety of options. They feature stainless steel or aluminum materials and are highly durable and corrosion-resistant. They also offer high torque capacities and excellent fatigue resistance. Flexible beam couplings are available with a wide range of options to meet your unique application needs.
China Professional API 11b 7/8 Class Sm Sucker Rod Coupling   cohesion and couplingChina Professional API 11b 7/8 Class Sm Sucker Rod Coupling   cohesion and coupling
editor by CX 2023-05-16