SAFETY JOINT
Product No. BI 441-01
The Safety Joint provides for emergency recovery of the major portion of the tubing string should it become necessary to abandon the equipment below. Precision left-hand square threads facilitate release of the joint by right-hand tubing rotation. Equipment requiring right-hand rotation should not be used below the Safety Joint.
SPECIFICATION GUIDE
| SIZE | Nom OD | Nom ID |
Standard Thread* Specification (Box Up & Pin Down) In. mm |
| In. mm | In. mm | ||
| 1.900 |
2.22 56.3 |
1.53 38.86 |
1.900 NU 10 RD 48.26 |
| 2-3/8 | 2.88 73.15 | 2.00 50.80 | 2-3/8 EU 8 RD 60.33 |
| 2-7/8 | 3.69 93.73 | 2.44 61.98 | 2-7/8 EU 8RD 73.03 |
| 3-1/2 | 4.50 114,30 | 2.98 75.69 | 3-1/2 EU 8RD 88.90 |
* Threads shown are "standard" for the respective sizes. Other threads are available on request.
MODEL "B" SHEAR-OUT SAFETY JOINT
Product No. BI 441-31
The Model "B" Shear-Out Safety Joint is designed for use between a Packer and a Sand Screen to provide a means of releasing and retrieving the production string, should the screen become sanded in. It may also be used in any application where an upstrain type of releasing device can be used.
The Shear-Out Safety Joint can be run with from 2 to 16 Brass Shear Screws, each valued at 2,500 lb. (1,13t), allowing the shear value of the tool to be varied from 5,000 to 40,000 lb. (2,26 to 18,14t). The tool is shipped with all 16 Brass Shear Screws in place. Remove the necessary number of shear screws required to obtain the desired releasing pull; i.e., if a releasing pull of 15,000 lb. is desired remove all but six (6 x 2,500 = 15,000) screws. The remaining screws should be as evenly spaced as possible.
SPECIFICATION GUIDE
| SIZE | Nom OD | Nom ID |
Standard Thread* Specification (Box Up & Pin Down) In. mm |
| In. mm | In. mm | ||
| 3-1/2 |
3.88 98.55 |
3.06 77.72 |
3-1/2 NU 10 RD 88.90 |
| 4 | 4.34 110.24 | 3.43 87.12 | 4 NU 8 RD 101.60 |
* Threads shown are "standard" for the respective sizes. Other threads are available on request.
