SUBS & JOINTS
1. Inside BOP
The inside BOP is a heavy-duty drop check valve with a conical plug to reduce the cuttingaction of the mud on the valve seat, ensuring positive closure whenever required.
| Connection | OD of Sub | ID of Sub | All Length | Weight |
| 2-3/8IF | 3-3/8’’—3-3/4’’ | 1-1/2’’ | 26’’ | 27 |
| 2-7/8IF | 4-1/8’’—4-1/4’’ | 1-3/4’’ | 28’’ | 40 |
| 3-1/2IF | 4-3/4’’—5-4/4’’ | 2’’ | 30’’ | 57 |
| 4IF | 6-1/4’’—6-3/4’’ | 2-1/2’’ | 33’’ | 110 |
| 4-1/2IF | 6-3/8’’—7’’ | 2-12/16’’ | 33’’ | 120 |
| 5-1/2IF | 7’’—7-1/2’’ | 2-12/16’’ | 33’’ | 140 |
| 6-5/8IF | 8’’ | 2-12/16’’ | 34’’ | 180 |
| 7-5/8IF | 9-1/2’’ | 2-12/16’’ | 34’’ | 220 |
2. IBOP for top drive
It includes Upper IBOP for Top Drive and Lower IBOP for Top Drive. They are used for top drive drilling system with joined one by one.
| Type | O.D. | I.D. | Connection(API) | OAL |
| DXS187 Upper IBOP | 187 | 77.8 | 6-5/8REG | 572(22-1/2) |
| DSS187 Lower IBOP | 7-23/64) | (3-1/16) | 523(20-19/32) | |
| DSS197 Upper IBOP | 197 | 77.8 | 6-5/8REG | 572(22-1/2) |
| DXS197 Lower IBOP | 7-3/4) | (3-1/16) | 523(20-19/32) | |
| DSS216 Upper IBOP | 216 | 77.8 | 6-5/8REG | 600(25-5/8) |
| DXS216 Lower IBOP | 8-1/2) | (3-1/16) | 512(20-5/32) | |
| DSS254 Upper IBOP | 254 | 102 | 8-5/8REG | 800(31-1/2) |
3. Kelly cock
Kelly cock is a manually operated ball type drill stem valve. It is divided into upper Kelly cock and lower kelly cock. The upper kelly cock is connected between lower end of swivel and upper end of kelly, the lower kelly cock is connected between upper end of drill pipe and lower end of kelly or connected between lower end of Kelly saver subs.
Specifications – Upper Kelly Cock
| Model | O.D. (mm) | Thread connection (LH) | I.D. (mm) | Max.sealing pressure(Mpa) |
| CS 146 | 146 | 4 1/2 REG | 50 | 68.6 |
| CS 200 | 200 | 6 5/8 REG | 76.2 | 68.6 |
Specifications – Lower Kelly Cock
| Model | O.D. (mm) | Thread connection | I.D. (mm) | Max.sealing pressure(Mpa) |
| XS105 | 105 | NC31 | 41.3 | 68.6 |
| XS121 | 121 | NC38 | 50 | 68.6 |
| XS127 | 127 | NC38 | 50 | 68.6 |
| XS165 | 165 | NC46 | 61 | 68.6 |
| XS178 | 178 | NC50 , 5 1/2FH | 71.4 | 68.6 |
4. Full opening safety valve
Full Opening Safety Valve is a ball type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well.
Our full opening safety valve is dual body type, so it does not interfere with the running of tools such as core barrels or survey instruments. It is designed to be stabbed into the top joint of drill pipe or tubing string at the rig floor and closed quickly in case a well kicks.
| Model | XS105-T44 | XS110-T51 | XS124-T62 | XS127-T62 | XS133-T57 | XS133-T57 | XS134-T62 |
| O.D. | φ105 | φ110 | φ124 | φ127 | φ133 | φ133 | φ134 |
| I.D. | φ44 | φ51 | φ62 | φ62 | φ57 | φ57 | φ62 |
| Connection | 2A10X2A11 | 210X211 | 2 7/8 EUE | 2 7/8 EUE | XT39 | 4 1/2VAM | 310X311 |
| Length | 732 | 726 | 578 | 578 | 773 | 1173 | 800 |
| Model | XS134-T62 | XS146-T50.8 | XS152-T76 | XS152-T76 | XS178-T76 | XS178-T76.2 | XS190-T82.6 |
| O.D. | φ134 | φ146 | φ152 | φ152 | φ178 | φ178 | φ190 |
| I.D. | φ60 | φ50.8 | φ76 | φ76 | φ76 | φ76.2 | φ82.6 |
| Connection | 4 1/2NU | NC31 | 3 1/2NU | 3 1/2 EUE | 3 1/2EUE | 4A10X4A11 | 410X411 |
| Length | 580 | 832 | 640 | 617 | 675 | 885 | 895 |
5. Pony drill collar
Pony drill collar is commonly used in oilfield drilling engineering. They are used to increase weight on bit, prevent deviation, to avoid breaking the drilling tools and so on. Pony drill collar has thick walls and other characteristics to improve the rigidity of the drill.
We can provide 3-1/2 “to 11” OD pony drill collar according to customers’ requirements.
6. Float valve sub
Float valve sub is a bit sub in which a float valve is installed. It’s connected at upper part of drill bit, the float valve assembly in sub is near the bit connecting thread and the float valve sub also can be necessary position of drill string.
| Model | Sub O.D.(mm) | Joint connection | Valve O.D.(mm) | I.D.(mm) |
| FFJT241 | 241.3 | 7 5/8 REG | ф121 | ф76 |
| FFJT228 | 228.6 | 7 5/8 REG | ф121 | ф76 |
| FFJT209 | 209.6 | 6 5/8 REG | ф121 | ф76 |
| FFJT203 | 203.2 | 6 5/8 REG | ф121 | ф71 |
| FFJT178 | 177.8 | 4 1/2 IF | ф98 | ф71 |
| FFJT165 | 165.1 | 4 1/2 REG | ф88 | ф57 |
| FFJT146 | 146 | 4 1/2 REG | ф88 | ф57 |
| FFJT121 | 121 | 3 1/2 REG | ф61 | ф51 |
| FFJT108 | 108 | 3 1/2 REG | ф61 | ф38 |
7. Cross-over sub
Cross-over sub plays an important role in switching and connection of drill stem in oil and gas drilling work.
There are three types for cross-over sub in structure:
Type A: OD of the top end and bottom end are in same size.
Type B: OD of the top end and bottom end are in different size
Type C: Rotation of connection Thread is left-hand thread.
8. Circulating sub
The circulating sub is connected between wellhead pipe string and ground circulating system. When casing is running or finished running, it is connected to make fluid circulation.
| Thread/ Model | I.D.(mm) | Length(mm) | |
| Drill pipe box connection | Casing thread | ||
| NC38 | 5 BTC | 57 | 500 |
| 5 LTC | |||
| 5 ST & C | |||
| NC38 | 5 1/2 BTC | 57 | 580 |
| 5 1/2 LTC | |||
| 5 1/2 ST & C | |||
| NC50 | 7 BTC | 71 | 600 |
| 7 LTC | |||
| 7 ST & C | |||
| NC50 | 9 5/8 BTC | 71 | 620 |
| 9 5/8 LTC | |||
| 9 5/8 ST & C | |||
| NC50 | 10 3/4 BTC | 71 | 670 |
| 10 3/4 LTC | |||
| 10 3/4 ST & C | |||
| NC50 | 13 3/8 BTC | 71 | 670 |
| 13 3/8 LTC | |||
| 13 3/8 ST & C | |||
9.Safety Joint:
We provide two kinds of safety joint– AJ type safety joint and H type safety joint.
Specifications – AJ Type Safety Joint
| Model | O.D. (mm) | I.D. (mm) | ThreadConn |
| AJ-C86 | 86 | 38 | NC26 |
| AJ-C95 | 95 | 44 | NC26 |
| AJ-C105 | 105 | 51 | NC31 , 2 7/8NU , 2 7/8EUE |
| AJ-C121 | 121 | 57 | NC38 |
| AJ-C159 | 159 | 71.4 | NC46 , NC50 |
| AJ-C165 | 165 | 71.4 | NC50 |
| AJ-C178 | 178 | 71.4 | NC50 , 5 1/2FH |
| AJ-C203 | 203 | 76 | 6 5/8REG |
| AJ-C228 | 228 | 76 | 7 5/8REG |
Specifications – H Type Safety Joint
| Model | O.D. (mm) | I.D. (mm) | ThreadConn |
| HAJ89 | 89 | 15 | NC26 |
| HAJ95 | 95 | 20 | NC26 |
| HAJ105 | 105 | 30 | NC31 |
| HAJ121 | 121 | 38 | NC38 |
| HAJ159 | 159 | 50 | NC46 , NC50 |
| HAJ165 | 165 | 50 | NC46 , NC50 |
| HAJ178 | 178 | 57 | NC50 , 5 1/2FH |
| HAJ203 | 203 | 71.4 | 6 5/8 REG |
10. Pup joint
The pup joint is used to adjust the height of full length tubing or casing strings, it is also used to adjust the depth of downhole tools.
Specifications:
Standard: API 5CT
Size: 2 3/8″, 2 7/8″, 3 1/2″, 4 1/2″
Grade: J55/K55/N80/L80/P110
Length: 2FT/3FT/4FT/5FT/6FT/8FT/10FT/12FT