Major features of “K” type mast:
1 Section type: “ K ” type ， i.e. front opening.
2 Lifting and lowering down mode: integral.
3 Low position installations. Generally it has 4 ～ 5 sections for the mast; flatly contacts between sections and bi-taper pin fixation are used for ensuring integral rigidness and stability of the mast.
4 Section connection structure of main body is good for convenient disassembling/installation and transportation.
5 There is a buffer cylinder at the left side and right side of mast separately, which can be used for buffering and pushing while lifting and lowering down the mast.
6 The space and height of the mast both can meet the requirements of related top drive installation.
7 When the mast is used to match with the cryogenic rig, it mee ts the requiremen ts of drilling operation at arctic, because i ts main componen ts are made of -40℃ high strength structural steel.
The main features of “mast” type mast:
1 The mast is a forward tilted type, with guyline, extendable and bi-section matched installation one.
2 The main body is a rectangular truss structure, with good rigidity, light weight.
3 Put the mast flatly on the front bracket of trailer when it is required to move; it mee ts the requirement of quick rig movement.
4 When the mast is used to match with the cryogenic rig, it mee ts the requiremen ts of drilling operation at arctic area, because i ts main componen ts are made of -40℃ high strength structural steel.
Main technical parameters :
Type |
“Mast” |
“Mast” |
“K”type |
“K”type |
“K”type |
“K”type |
“K”type |
“K”type |
Model |
J158/36-W |
JJ180/36-W |
JJ170/41-K2 |
JJ225/43.2-K |
JJ315/45-K |
JJ450/45-K |
JJ450/45-K7 |
JJ675/48-K |
Max. static load |
kN |
1580 |
1800 |
1700 |
2250 |
3150 |
4500 |
4500 |
6750 |
Work height |
m |
36 |
36 |
41 |
43.2 |
45 |
45 |
45 |
48 |
Tilt while operating |
|
3.5° |
3.5° |
|
|
|
|
|
|
Top span
（ front×side ） |
m |
|
|
1.7×2.0 |
2.0×2.0 |
2.1×2.05 |
2.2×2.2 |
2.5×2.3 |
2.5×2.3 |
bottom span
（ front×side ） |
m |
|
|
7.5×2.3 |
8 |
8 |
9.11 |
8.5 |
10 |
Height of racking board |
m |
20.2 |
20.2 |
22.2 |
24.5 |
24.5 |
24.5 |
24.5 |
24.5 |
m |
21.5 |
21.5 |
22.8 |
25.5 |
25.5 |
25.5 |
25.5 |
25.5 |
m |
22.5 |
22.5 |
33.4 |
26.5 |
26.5 |
26.5 |
26.5 |
26.5 |
m |
24.0 |
24.0 |
|
|
|
|
|
|
Capacity of racking board
（ Φ 114mm DP ） |
m |
2000 |
3000 |
3000 |
4000 |
5000 |
7000 |
7000 |
9000 |
Wind resistance |
Non- operation status （ w/no standpipe and hook load ） |
m/s |
31 |
31 |
47.8 |
47.8 |
47.8 |
47.8 |
47.8 |
47.8 |
Non- operation status （ w/full standpipe and no hook load ） |
m/s |
31 |
31 |
36 |
36 |
36 |
36 |
36 |
36 |
Mast is raised up and lowered down |
m/s |
≤8.3 |
≤8.3 |
≤8.3 |
≤8.3 |
≤8.3 |
≤8.3 |
≤8 |
≤8 |
|
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