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Safety joint is one kind of downhole work safety equipment for fishing, washover and testing. Which could connect with needed parts in downhole and could bear various tension and compression load and transmit torque in the operation. It is easy to back off once the safety joint is needed, so that convenience to disassemble its upper drill stem. It is also easy to connect and continue to work when running In downhole again.
OD | ID | OAL | Connection |
mm (inch) | mm (inch) | mm (ft) | |
105 (4-1/8) | 38.1 (1-1/2) | 805 (2.6) | NC31(NC31LH)Bxp |
121 (4-3/4) | 50.8 (2) | 1060 (3.5) | NC38 (NC38LH) E * P |
159 (6-1/4) | 57.2(2-1/4) | 1000 (3.3) | NC50 (NC50LH) E * P |
165 (6-1/2) | 70 (2-3/4) | 1100 (3.6) | NC50 Bxp |
168 (6-5/8) | 70 (2-3/4) | 1065 (3.5) | NC50 Bxp |
168 (6-5/8) | 71.4(2-13/16) | 1200 (3.9) | NC50 Bxp |
178 (7) | 70 (2-3/4) | 1100 (3.6) | NC50 Bxp |
203 (8) | 80 (3-5/32) | 1065 (3.5) | 6-5/8REG Bxp |
89 (3-1/2) | 31.8(1-1/4) | 685 (2.2) | NC26 Bxp |
95 (3-3/4) | 38.1 (1-1/2) | 663(2.17) | NC26 Bxp |
105 (4-1/8) | 50.8 (2) | 679 (2.22) | NC31Bxp |
121 (4-3/4) | 62 (2-7/16) | 712(2.3) | NC38 Bxp |
127(5) | 62 (2-7/16) | 712(2.3) | NC38 Bxp |
159 (6-1/4) | 80 (3-5/32) | 781 (2.56) | NC50 Bxp |
165 (6-1/2) | 82 (3-15/64) | 751 (2.5) | NC50 Bxp |
178 (7) | 82 (3-15/64) | 791 (2.59) | NC50 Bxp |
203 (8) | 82 (3-15/64) | 841 (2.8) | 6-5/8REG Bxp |
229(9) | 88.9 (3-1/2) | 910(3) | 7-5/8REG Bxp |
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