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JFETC Technical Note #1 Rev 0, October 2014 1

JFEBEARTM

Premium Connection Interchangeability Rules

𝑺𝒕𝒆𝒑 𝒑𝒆𝒓 𝒔𝒊𝒅𝒆 = 𝑯𝒊𝒈𝒉𝒆𝒓 𝑾𝒆𝒊𝒈𝒉𝒕 𝑷𝒊𝒏 𝑰𝑫− 𝑳𝒊𝒈𝒉𝒕𝒆𝒓 𝑾𝒆𝒊𝒈𝒉𝒕 𝑩𝒐𝒙 𝑰𝑫

𝟐

𝑺𝒕𝒆𝒑 𝒑𝒆𝒓 𝒔𝒊𝒅𝒆 = 𝑯𝒊𝒈𝒉𝒆𝒓 𝑾𝒆𝒊𝒈𝒉𝒕 𝑩𝒐𝒙 𝑰𝑫− 𝑳𝒊𝒈𝒉𝒕𝒆𝒓 𝑾𝒆𝒊𝒈𝒉𝒕 𝑷𝒊𝒏 𝑰𝑫

𝟐

JFFBEARTM Connections with differing weights are interchangeable

within a given OD. When differing weights or grades are made-up

together:

Make-up Torque:

o The lower make-up torque of the lighter weight/grade

connection should be used.

Connection ID

o Pin higher weight than coupling – Step on pin side of

connection.

o Box higher weight than pin – Step on box side of connection.

o Dimensions per side of the step may be determined with the

rules below. See next page for examples.

Connection OD – Check coupling OD’s (Heavier weights may have

larger coupling OD’s)

Standard Connection

Pin higher weight than box

Box higher weight than pin

Coupling

Pin

Coupling

Pin

Coupling

Pin

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JFETC Technical Note #1 Rev 0, October 2014 2

JFEBEARTM Mixed connections examples (torque values with API modified):

Example 1: Pin heavier than box, same grade. ID step = 0.031”, applied torque meets lighter

weight.

Example 2: Same weights, different grades. No ID step, applied torque meets lower grade.

Example 3: Box heavier than pin. ID step = 0.042”, different grades, applied torque meets

lighter weight and lower grade.

Note: These interchangeability rules are to be used when running tubing and casing.

When accessory items such as tubing or casing hangers are being ran, it is

recommneded to contact your nearest JFETC office.

Weight GradeNominal

Connection ID

Minimum Field

Torque

Optimum Field

Torque

Maximum Field

Torque

(lb/ft) (ksi) (in) (ft-lbs) (ft-lbs) (ft-lbs)

BOX 10.2 80 2.915 4040 4490 4940

PIN 12.7 80 2.853 4710 5230 5760

0.031 4040 4490 4940

Differing Weights + Same Grades

3 1/2" JFEBEAR™

Applied Torque

Step/Side

Weight GradeNominal

Connection ID

Minimum Field

Torque

Optimum Field

Torque

Maximum Field

Torque

(lb/ft) (ksi) (in) (ft-lbs) (ft-lbs) (ft-lbs)

BOX 10.2 80 2.915 4040 4490 4940

PIN 10.2 95 2.915 4690 5210 5730

0.000 4040 4490 4940

Applied Torque

Step/Side

Same Weights + Differing Grades

3 1/2" JFEBEAR™

Weight GradeNominal

Connection ID

Minimum Field

Torque

Optimum Field

Torque

Maximum Field

Torque

(lb/ft) (ksi) (in) (ft-lbs) (ft-lbs) (ft-lbs)

BOX 15.2 95 3.852 7110 7900 8690

PIN 12.6 80 3.936 4860 5400 5940

0.042 4860 5400 5940

Differing Weights + Differing Grades

4 1/2" JFEBEAR™

Applied Torque

Step/Side

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