. .. , , (.. 4-7).
- .
4-7 | (Dog-leg) DL = cos-1[cos(I2-I1) - sinI1sinI2(1 - cos(A2-A1)] (RF) MD , I . , : RF = 360 tan (DL/2) [ DL/p ]-1 |
RF = 360*(1 - cosDL) *[ DL*p *sinDL ]-1
DL . (DL <.0001), RF 1.
DTVD = (DMD/2) (cosI1+cosI2) RF
DNorth = (DMD/2) (sinI1cosA1+sinI2cosA2) RF
DEast = (DMD/2) (sinI1sinA2+SinI2sinA2) RF
- . .
, , . . (STL). , , , ,
DTVD = [ (DMD - STL)/2 ] *(cosI1+cosI2) + STL*cosI2
DNorth = [(DMD-STL)/2](sinI1cosA1+sinI2cosA2) + STL sinI2cosA2
DEast = [(DMD-STL)/2](sinI1sinA1 + sinI2sinA2) + STL sinI2sinA2
, , 2000 MD c 3/100 100. . TVD, 1653,99 954,93 .
, , . .
, , . , , .
/ . 100 10 30 .
|
|
, :
d = DLS
I1 = 1
A1 = 1
I2 = 2
A2 = 2
, :
1. DLS = (d/DMD)2sin-1{[(sinDI/2)2 + (sinDA/2)2 * sinI1sinI2]}1/2
.
2. DLS = (d/DMD)cos-1 [(sinI1sinI2)(sinA1sinA2+cosA1cosA2)+(cosI1cosI2)]
.
3. DLS = (d/DMD)cos-1[cosDI - (sinI1sinI2)(1 - cosDA)]
. , , .
4-1
TVD (ft) | (ft) | |
-25,38 -0,38 | +43,09 -0,21 | |
+0,19 | +0,11 | |
0,00 | 0,00 | |
0,00 | 0,00 | |
(STL=15) | -0,37 | -0,04 |