Oil Rig Equipment Oil Well Drilling Rig and Workover Rig API 4F , Mast
The drilling and workover s with different loadings is designed and fabricated according to API Spec 4F, including A type, Tower type, K type, special K type, mast type and the special type used in offshore drilling.
Features of Masts-Open Face
* Open-face masts.
* Raising mode: integral and bootstrap.
* Masts are installed at ground level and divide into sections. Sections are connected with each other by means of double pins to ensure connections integrity.
* Mast stems are of beam structure for easy of assembly/disassembly and transportation.
* Two hydraulic cylinders (left & right) are provided to be used as snubber when raising masts and as primary push-pull force when lowering masts.
* Masts’ space and height meet the need of installing top drive.
* Masts conform to API 4F.
| Model |
JJ135/31.5-K |
JJ225/43-K |
JJ315/45-K |
JJ450/45-K |
JJ675/48-K |
| Max. static load rating kn |
1350 |
2250 |
3150 |
4500 |
6750 |
| Working height m (ft) |
31.5 (104) |
43 (141) |
45 (147) |
45 (147) |
48 (157) |
| Top span (front x side) m (ft) |
1.7x1.7 (5.6x5.6) |
2x2 (6.6x6.6) |
2.1x2.05 (6.9x6.6) |
2.1x2.05 (6.9x6.6) |
2.4x2.6 (7.9x8.5) |
| Bottom span m (ft) |
6 (20) |
8 (26) |
8 (26) |
9 (30) |
10 (33) |
| Height of monkey board m (ft) |
17.5 (57.4)
16.5 (54.1) |
26.5 (87) |
26.5 (87) |
26.5 (87) |
26.5 (87) |
| 25.5 (83.7) |
25.5 (83.7) |
25.5 (83.7) |
25.5 (83.7) |
| 24.5 (80.4) |
24.5 (80.4) |
24.5 (80.4) |
24.5 (80.4) |
| Capacity of monkey board m (ft) |
2000 (6560) |
4000 (13120) |
5000 (16400) |
7000 (22960) |
9200 (301840) |
| Wind load capacity |
Under non-working condition
(no stand, no hook load)
km/h (NMPH) |
172 (93) |
172 (93) |
172 (93) |
172 (93) |
172 (93) |
Under non-working condition
(full stands, no hook load)
km/h (NMPH) |
130 (70) |
130 (70) |
130 (70) |
130 (70) |
130 (70) |
Raising & lowering mast
km/h (NMPH) |
30 (16) |
30 (16) |
30 (16) |
30 (16) |
30 (16) |
