Knuckle Joint

The Knuckle Joint is a high-flexibility connection tool used to increase the flexibility and pass-through capability of the tool string, helping tools smoothly enter directional, deviated, or complex well sections and reducing downhole operational resistance. In situations where tools must pass through a restricted-size hole or where the wellbore trajectory has a large deviation, the knuckle joint provides 360° free rotation and allows for a 15° angle deviation throughout the rotation, ensuring the tool string passes through the wellbore smoothly. Its core structure, consisting of a ball head and a sleeve, maintains a sealed state during rotation while withstanding downhole pressure, ensuring operational stability.

Product Features

Compact Structure, Short Length: The optimized design reduces the total length of the tool string, making it convenient for operations in narrow well sections.

Excellent Sealing Performance: Maintains a good seal during rotation, preventing downhole leakage.

15° Angle Deviation: Adapts to complex wellbore trajectories and improves downhole pass-through capability.

360° Free Rotation: Allows the lower tool to freely adjust to the direction of the wellbore, reducing frictional resistance.

 Full Bore ID Design: Compatible with ball-drop operations, eliminating the need for additional tools for fluid control.

OD in	ID in	Length in	Press. psi	Connection
1.69	0.5	10	10000	1 AMT
2.125	0.75	10	10000	1 1/2 AMT
2.375	0.75	10	10000	1 1/2 AMT
2.875	1	14.17	10000	2 3/8 PAC
3.125	1	16.54	10000	2 3/8 PAC