I. Product Overview

The swivel joint is a metal pipeline connector equipped with rolling bearings. It is a series of products manufactured through digestion, absorption, and technological innovation based on technology transferred from FMC Corporation in the United States. We can provide various types of swivel joints and repair kits for use in normal temperature, low temperature, and sour gas conditions.

Long radius swivel joints have a smooth bore, which minimizes the resistance when fluid passes through. The erosive corrosion of the turning point's wall thickness caused by the fluid is better than that of short radius types. However, short radius joints are sometimes used due to constraints on site installation space or when the pressure is low.

The swivel joint is a high-pressure fluid control element used in cementing and fracturing equipment. It is a fitting that changes the connection direction of the construction pipeline and facilitates pipeline connection. It is widely used in high-pressure discharge lines, input lines, temporary flow lines, well testing lines, and other high-pressure conveying lines in acidic operating environments (excluding operating environments containing CO2​ and H2​S sour gases). Swivel joint specifications range from 2″ to 4″ in, with a rated working pressure of 42 MPa to 140 MPa, and a working temperature of −29℃ to 121℃.

Our company’s meticulously designed and manufactured 2″ to 4 ″ long radius swivel joints come in ten different types, allowing 360 degrees of rotation in one, two, or three different directions.

II. Design Features

The technical parameters and performance of all swivel joints comply with API Specification 6A. Their Product Specification Level is PLS3, and the Performance Requirement is PR2. They are interchangeable with similar products from SPM Corporation.

The swivel joint is manufactured from high-strength alloy steel processed through a special heat treatment technology. It adopts a unique raceway and steel ball structure to ensure the swivel joint has good rotation and impact resistance. The Acme threaded connection makes it easy and quick to disassemble, while ensuring a firm and reliable connection. Multiple sealing designs and extremely high machining accuracy ensure the swivel joint's sealing performance.

1. The 90 ° swivel joint is connected by a hammer union, which features flexible, quick make-up and break-out, pressure resistance, and reliable sealing, making it convenient for transportation and storage.

2. The long radius swivel joint features a three-row ball raceway design, which can effectively withstand heavy loads and radial loads. This results in stable performance under pressure and reduced pipeline vibration under varying loads.

3. All connecting dimensions are completely equivalent to similar products from FMC Corporation used in cementing and fracturing equipment, offering strong interchangeability.

4. The wall thickness is uniform, ensuring a long service life and smoother fluid conveyance.

5. The seals are made of Hydrogenated Nitrile Butadiene Rubber (HNBR), ensuring good sealing performance.

6. The seals are equipped with a metal anti-blowout ring and designed with a pressure relief port. In the event of seal leakage, this automatically reduces pressure to prevent pressure accumulation within the ball raceway cavity, greatly enhancing safety in use.

7. On-site maintenance of high-pressure swivel joints typically only requires the occasional addition of lubricant to ensure normal operation.

III. Main Technical Parameters of Swivel Joints

1. The various hammer union connections for the 90 ∘ swivel joint include: Type 10, Type 20, Type 30, Type 50, Type 60, Type 80, and Type 100. Common connection methods are as follows:

           Type 10（M×M）                    Type 10（F×M）                 Type 50（F×M）              Type 50(M×M)            Type30（F×M）

             Type 100（F×M）              Type 80（F×M）                   Type 100（M×M）               Type 50(F×F)         Type 20（F×M）

2. Common High-Pressure Swivel Joint Specifications and Models:
10 Type Long Radius Swivel Joint

10 Type F×M Long Radius Swivel Joint	10 Type M×M Long Radius Swivel Joint

20 Type Long Radius Swivel Joint

30 Type Long Radius Swivel Joint

50 Type Long Radius Swivel Joint

80 Type Long Radius Swivel Joint

100 Type Long Radius Swivel Joint

3.Exploded View of a 3-inch, 105 MPa (15,000 PSI) Fig 1502, Male x Male (M x M) Style 10 90-degree Swivel Joint.

4.Parts List for an Example 3-inch, 105 MPa (15,000 PSI) Fig 1502, Male x Male (M x M) Style 10 Swivel Joint.

5.1.Standard Service Swivel Joint Repair Kit

①Grease Retainer Ring ②O-Ring Seal ③Packing ④ Internal Retaining Ring ⑤Ball Plug ⑥ Steel Ball ⑦Grease Plug

5.2.H₂S Service Long Radius Swivel Joint Repair Kit

① Grease Retainer Ring ② Outer Ball Race Insert ③ Inner Ball Race Insert ④O-Ring I ⑤ Packing ⑥Internal Retaining Ring ⑦ O-Ring II ⑧ Ball Plug ⑨ Steel Ball ⑩ Grease Plug

IV. Pre-Use Instructions (Instructions for Use)

1. Prior to use, the swivel joint's rated working pressure, applicable specifications (size), and allowable temperature range must be confirmed from the nameplate.

2. The operator must consider the temperatures the equipment will be subject to during drilling or production and select an appropriate temperature rating, ensuring the swivel joint used is compatible with the allowable temperature.

3. All swivel joints undergo strict hydrostatic testing and Non-Destructive Testing (NDT) before leaving the factory. After any disassembly or maintenance, a hydrostatic test must be performed. The test pressure must be the rated working pressure, held for 10 minutes, with no sign of leakage (Note: All air must be bled from the system before testing).

4. Swivel joints must be regularly measured for pipe wall thickness using an ultrasonic thickness gauge, recommended monthly. If the reading falls below the minimum effective thickness value, the joint must be replaced immediately. Replacement should be carried out along with other flowline components.

5. Swivel joints must not be operated under conditions of continuous rotation or frequent oscillation/swinging. They must not be submerged in water or operated underwater. The swivel joint must not bear axial load during operation.

6. When installing the swivel joint, it should be fully lubricated with sealing grease, and checked manually to ensure each joint rotates flexibly and without seizing. Operators must wear protective eyewear to prevent small fragments from flying out and causing eye injury during installation.

V. Operating Procedures and Precautions

Operating Procedures:

(1) Before use, check that all swivel joint components are flexible and in good working order. The joint must be complete, undamaged, and meet all standards before use. (2) The allowable pressure must meet the requirements of the job procedure. Joints that do not meet the standard cannot be used. (3) Hand-tighten the hammer union, then adjust the joint to the required angle before hammering it tight or tightening it with a pipe wrench.

Precautions:

(1) Clean the joint thoroughly after use and store it properly. (2) Grease the bearings frequently to prevent rust and seizing.

VI. Warnings

1. Strictly prohibited to use the swivel joint at pressures exceeding the rated working pressure.

2. The designed operating temperature range for the swivel joint is −46 ℃ to 121℃. If the ambient temperature falls below −46 ℃, or the temperature of the contact fluid exceeds 121℃, use must be stopped immediately.

3. Do not disassemble the swivel joint while the system is under working pressure.

4. Swivel joints that fail to meet the specified wall thickness are strictly prohibited from use. Mixing new and old swivel joints in a flowline assembly is strictly prohibited.

VII. Transportation

1. Swivel joints must be protected from impact and rain during transportation.

2. Swivel joints must be stored in a ventilated, dry place, away from direct sunlight and rain. Contact with corrosive substances such as acids, alkalis, or salts is strictly prohibited.

VIII. Service

1. Under normal storage and usage conditions, the company is responsible for free replacement or repair if the product's manufacturing quality affects normal use within six months from the date of ex-works (delivery) or three months of product use.

2. Each product is accompanied by a Certificate of Quality, a Packing List, and an Instruction Manual.

3. Users may order corresponding products based on the models listed in the catalog (or table). For special requirements, the company can undertake design and manufacturing.

4. To submit suggestions or criticism regarding the company's products, please fill out the "User Feedback Survey Form" and send it via email.

Swivel joint 钻井、修 井设备规范 钻井、修 井设备规范 钻井、修 井设备规范   钻井、修 井设备规范 钻井、修 井设备规范  钻井、修 井设备规范 钻井、修 井设备规范  钻井、修 井设备规范