China Good quality API 11b Sucker Rod Coupling Rod Coupling Made in China coupling electrical

Product Description

Product Description

Two different grades of Sucker Rod Couplings are available: T and SM. The manufacturing process of both the grades is the same with cold worked pre-stressed, roll-formed threads with the anti-galling coating. This process results in stronger/fatigue resistant threads.
The manufacturing inspection, the dimensions and the tolerances of the couplings match or exceed the specifications of the latest API standards.

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

 

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)

|
Request Sample

Customization:
Available

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Customized Request

gearbox

Programming With Couplings

A coupling is a mechanical device that connects two shafts together and transmits power. Its purpose is to join rotating equipment and allows some degree of end-movement or misalignment. There are many different types of couplings. It’s important to choose the right one for your application.

Mechanical connection between two shafts

There are many ways to achieve mechanical connection between two shafts, including the use of a coupling. One common type is the beam coupling, which is also known as a helical coupling. It is used for transmission of torque between two shafts. This type of connection accommodates axial, parallel and angular misalignments.
The hubs and shafts of a worm gear are connected together by a coupling. This mechanical connection allows one shaft to turn another without causing a mechanical failure. This type of coupling is made from sliding or rubbing parts to transfer torque. However, the coupling is not designed to withstand jerks, so it isn’t suitable for high-speed applications.
The use of a coupling is common in machinery and equipment. It helps transmit power from one drive shaft to the other, while adding mechanical flexibility. It is also useful for reducing the impact and vibration caused by misalignment. It also protects the drive shaft components from wear and tear.
A double-hook coupling can be used to provide a uniform angular velocity at the driven shaft. Another example is a double-jointed coupling. A double-jointed coupling can be used to connect shafts that are not directly intersecting. The double-jointed yoke can be used for the same purpose.
A shaft coupling is a device that maintains a strong mechanical connection between two shafts. It transfers motion from one shaft to another, at all loads and misalignments. Unlike a conventional linkage, a shaft coupling isn’t designed to allow relative motion between the two shafts. Couplings often serve several purposes in a machine, but their primary use is torque and power transmission.

Functions that control the flow of another function

One of the simplest programming constructs is a function that controls the flow of another function. A function can take an argument and return a different value, but it must be ready to return before it can pass that value to another function. To do this, you can use the goto statement and the if statement. Another way to control flow is to use a conditional statement.
gearbox

Criteria for selecting a coupling

There are several important factors to consider when choosing the right coupling. One of the most important factors is coupling stiffness, which depends on the material used and the shape. The stiffness of a coupling determines its ability to resist elastic deformation. A stiff coupling is desirable for certain types of applications, but it’s undesirable for others. Stiffness can reduce the performance of a system if there’s too much inertia. To avoid this, ensure that the coupling you choose is within the recommended limits.
The size of a coupling is also important. Different coupling types can accommodate different shaft sizes and shapes. Some couplings have special features, such as braking and shear pin protection. When choosing a coupling, you should also consider the type of driven equipment. If you need to connect a high-torque motor, for example, you’ll want to choose a gear coupling. Likewise, a high-speed machine may require a disc coupling.
Another factor to consider when selecting a coupling is the torque rating. Despite its importance, it’s often underestimated. The torque rating is defined as the torque of the coupling divided by its OD. In some cases, torque may fluctuate during a cycle, requiring a coupling with a higher torque rating.
Torsionally flexible couplings are also important to consider. Their design should be able to withstand the torque required during operation, as well as the required speed. The coupling should also have a high degree of torsional stiffness, as well as damping. Furthermore, a damping coupling can reduce the energy wasted through vibration.
The sizing of a coupling is also determined by the torque. Many engineers use torque to select the correct coupling size, but they also take into consideration torsional flexibility and torsional stiffness. For example, a shaft may be able to handle large torque without damaging the coupling, while a disk may be unable to handle large amounts of torque.
Besides torque, another important consideration in coupling selection is the cost. While a coupling may be cheaper, it may be less reliable or easier to maintain. Couplings that are difficult to service may not last as long. They may also require frequent maintenance. If that’s the case, consider purchasing a coupling with a low service factor.
There are many different types of couplings. Some require additional lubrication throughout their lifetime, while others are 100% lubrication-free. An example of a 100% lubrication-free coupling is the RBI flexible coupling from CZPT. This type of coupling can significantly reduce your total cost of ownership.
In addition to the above-mentioned benefits, elastomeric couplings are low-cost and need little maintenance. While they are often cheaper than metallic couplings, they also have excellent shock absorption and vibration dampening properties. However, they are susceptible to high temperatures. Also, they are difficult to balance as an assembly, and have limited overload torque capacity.
China Good quality API 11b Sucker Rod Coupling Rod Coupling Made in China   coupling electricalChina Good quality API 11b Sucker Rod Coupling Rod Coupling Made in China   coupling electrical
editor by CX 2023-05-15

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