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Crossover sub is mainly used to connect upper and lower drill tools in different
connectors in drilling operations. Also it can be used to protect
other tooling in drill stem (called saver sub) or be used to
deliver outgoing air to the bit face just above the bit (called bit
sub).
The length of crossover subs is generally measured from shoulder to
shoulder. Typical lengths range from 6" - 28" long going up in
increments of 2 inches with AISI 4145H, AISI 4145H Mod, AISI 4340,
AISI 4140-4142 and Non-magnetic material. All connections are
phosphate-coated or copper plated to improve resistance to
corrosion. Crossover subs come in three basic types: A Pin (male) *
Box (female); B Pin (male) * Pin (male); C Box (female) * Box
(female)
API Drilling Crossover Sub
| Description | Upper Connection Part | Lower Connection Part | Type |
| Kelly cross-over sub | Kelly | Drill pipe | A or B |
| Drill pipe cross-over sub | Drill pipe | Drill pipe | A or B |
| Interim cross-over sub | Drill pipe | Drill collar | A or B |
| Drill collar cross-over sub | Drill collar | Drill collar | A or B |
| Drill bit cross-over sub | Drill collar | Drill bit | A or B |
| Swivel cross-over sub | Swivel lower sub | Kelly | C |
Fishing cross-over sub | Kelly | Drill pipe | C |
| Drill pipe | Fishing tools | C | |
| Crossover sub can be customized as per customer's design. | |||
Mechanical Properties
| O.D. Range | Min. Yield Strength | Min. Tensile strength | Elongation Min. | Min. Brinell Hardness |
| 3.1/2 THRU 6.7/8 | 760Mpa | 965Mpa | 13% | 285 |
| 7 THRU 10 | 690Mpa | 930Mpa | 13% | 277 |
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Company Information:
About us
Dongying OilMan Machinery Equipment Co.,Ltd is a professional supplier of various petroleum equipment, including drilling rig accessories, well control system, drill string, handling tools, downhole tools, OCTG, drilling tools, cementing tools and sapre parts with API certification. Our products have been exported to Russia, America, Middle East, South America, Southeast Asia, Central Asia, African, Australia, Europe etc. Our company is willing to cooperate and make common progress with friends at home and abroad with first-class products, first-class service and reasonable prices.
Certificates
API-5CT, API-10D, API-7K, API-11E, API-6A, API-11AX, API-5D, ISO 9001, ISO14001, ISO18001 etc.
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