We produces all kinds of conversion joints, the main varieties are drill pipe-drill pipe, drill pipe-drill tool, drill pipe-casing conversion joint; drill pipe-tap, drill pipe-faucet conversion joint, etc. When selecting a conversion joint, it is necessary to clarify the standard of connecting thread and the sequence of connecting thread. The conversion joint products follow the following coding principles.
Drill Pipe-Drill Pipe, Drill Tools, Casing Adapter Coding
Adapter-Drill Pipe/Drill Pipe-Drill Pipe 1/Drill Pipe 2 (Drilling Tools, Casing)举例：ZHJT-RC/RC-NC/NCR
Drill pipe-tap adapter coding
Adapter-Tap-Drill Pipe 1/Tap举例：ZHJT-GSZ-NC/NC
Drill pipe-faucet adapter coding
Adapter-Faucet-Drill Pipe/FaucetExample: ZHJT-SLT-NC/JS02
mushroom head coding
Lever-Mushroom Head/Drill PipeExample: TYQ-K65-MGT/NC
Engineering investigation is the assembly of drilling, well exploration, sounding and geophysical prospecting to find out the engineering geological conditions.
Engineering survey tools mainly include standard penetration device and soil sampler.
| Standard and parameter performance of engineering survey tools | |||
| NO. | Standard | Name | Encoding |
| Soil sampler | |||
| 1 | 2 inch | Soil sampler | QTQ-2 inch |
| 2 | 3 inch | Soil sampler | QTQ-3 inch |
| 3 | SPT | Soil sampler | QTQ-SPT |
| standard penetration device | |||
| 1 | 63.5 | standard penetration device | BGQ-63.5 |
Free tongs are special tools for unscrewing drill pipes, drilling tools and casings.
The drill pipe free clamp adopts alloy structure with large clamping force, and has five specifications of 56, 71, 89, 114 and 140, which can also be applied to casing of the same specification. The inner tube free clamp adopts diamond brazing process to effectively protect the inner tube, with six specifications of 43N, 47N, 56N, 73N, 95N and 118N.
Pipe tongs have 18 inch, 24 inch, 36 inch, 48 inch, 60 inch five specifications.
Standard and Parameter Performance of Drill Pipe Free Tongs
| NO. | Standard | Name | Applicable Drilling Casing Standards |
| 1 | ZYQ-B56A-ZTG | Drilling Casing Free Tongs | B |
| 2 | ZYQ-N71A-ZTG | Drilling Casing Free Tongs | N |
| 3 | ZYQ-H89A-ZTG | Drilling Casing Free Tongs | H |
| 4 | ZYQ-P114A-ZTG | Drilling Casing Free Tongs | P |
| 5 | ZYQ-140-ZTG | Drilling Casing Free Tongs | S |
Standard and parameter performance of inner tube free clamp
| NO. | Standard | Name | Applicable drilling tool standards |
| 1 | ZYQ-B41/43-NG | inner tube free clamp | BC |
| 2 | ZYQ-B47-NG | inner tube free clamp | BC2 |
| 3 | ZYQ-N53/56-NG | inner tube free clamp | NC、NC2 |
| 4 | ZYQ-H71/73-NG | inner tube free clamp | HC |
| 5 | ZYQ-P95-NG | inner tube free clamp | PC |
| 6 | ZYQ-118N | inner tube free clamp | SC |
