SY/T 5234-1991 Calculation method of hydraulic parameters in jet drilling
Some standard content:
SY/T 5234--91 Petroleum and Natural Gas Industry Standard of the People's Republic of China
Calculation method of hydraulic parameters of jet drilling
Published on July 19, 1991
Ministry of Energy of the People's Republic of China
Implementation on November 1, 1991
Subject content and applicable scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Calculation method of hydraulic parameters of jet drilling
This standard specifies the calculation method of hydraulic parameters of jet drilling in oil and natural gas drilling. This standard is applicable to the calculation of hydraulic parameters of jet drilling in oil and natural gas drilling. 2 Symbols, names and units in calculation formulas (see Table 1) Table 1
And bottom and product
Nozzle and!
Drill string outer diameter
Drill bit diameter
Drill pipe outer diameter
Cuttings diameter
Drill pipe inner diameter
Swirl punching edge
Annulus purification coefficient
Critical well depth
Drilling fluid plate variation coefficient
Annulus pressure loss coefficient
Drill bit pressure drop coefficient
Drill chain pressure loss coefficient
Drill armor internal pressure sugar coefficient
Internal pressure loss coefficient
Drill pipe pressure loss coefficient
Drill pipe internal pressure loss coefficient
Control surface manifold pressure loss coefficient
Drill string length
Drill low length
Drill pipe length
Viscous head water power
Aluminum pump actual water power
Rated water power of drilling pump
Drilling fluidity index
Huanbao pressure cake
Drill bit drop
Approved by the Ministry of Energy of the People's Republic of China on July 19, 1991
SY/T 5234--91
Pa·sn
Implemented on November 1991
Aluminum pressure loss
Drill pipe positive excess
Drill string circulation pressure
SY/T: 5234--91
Rated pump pressure of aluminum well
Combined pump working pressure
Pressure loss of rainwater pipe
First discharge
Rated discharge
Annular number
Drill bit unit water accumulation power
Annular return speed
Critical return speed
Jet flow
Rock sliding speed
Viscosity
Drilling fluid
Drilling fluid density
Solution density||t t||Service value
New well pump water gradual profit monthly rate
Reading of rotating viscosity meter at 600r/min
Reading of rotating viscosity meter at 300r/min
Reading of rotating viscosity meter at 200r/min
Reading of rotating viscosity meter at 100t/min
Jet drilling hydraulic parameter calculation formula
Plastic viscosity
t0600—0300
Service value
Ty-0.479(20900 —8Go0)
Flowability index
n-3.32108
Consistency coefficient
K0.4799a2
Annular return velocity
3.6 Determine the annular flow state
3.6.1 Bingham fluid
SY/T 5234—91
30.864μ+t(30.864/4p)*×123.5tpm(DxD,)2j0.5240m(D—D,)
Re- 9800 (Dx-D,)u2p-
t(Dr--D,)+12vaus
wRe22100
Vue or Re<_2100
3.6.2 =Incubation fluid
Ve—0.00508
V or 2808 element flow
V. or Z<808
3.7 Rock buttock sliding speed
2.04X10*m0.38K
0.071Dr.Cor
For Bingham fluid:
For accumulative fluid:
3.8 Annulus purification coefficient
3.9 Ground manifold pressure loss
3.9.1 Bingham fluid
3.9.2 Incubation fluid
(pmu i)0.33a
+0.112-)
u=1075no.119
kes-3.767×10-tpmn-8upo-2
Pa=kQ!
ksp=8.09×10 *4(1ogn+2.5),
4.088×10-1K
[4.093(3n+)
phpQ(12-(a-261.4-1om377
Pinner pressure consumption
3.10.1 Binjiao fluid
hr-7628pmo.Bupo.
3.10.2 Power-law fluid
3.11 Annular pressure loss
3.11.1 Binwen fluid
Pi=RLO1
64846(1ogn+2.5)om [7.71×10-1d:Kds
2.546 × 10°(3#+1)
(1.4-1ogm)/）
p/=kiLQ++(n-21(1.1-101/7
lugn)ft
a. Laminar flow
3.11.2 Power-law fluid
a. Laminar flow
Circulation pressure loss
Drill bit pressure drop
Drilling pump working pressure
Jet jet velocity
Jet impact force
Drill bit water power
SY/T 5234—91
(DD)3(D+D)
76280mo-8up0.2
（DD(+)8
0.004K1. [ 5.09×108Q(2n-1)
(Da-D)Ln(D:+D)(DaD)2
79419(10gn+2.5)pmL 56.2967 × 10~11K(D,+ D)*(D,-D)2(D:+D)(DD)3
[5.09×10(2n-1),7
(1.4-10gn)/T
Ln(D)(Da=D)
pa=h,LQ=14+(4-2( 1.4~10g)])
ke-k+hpn*
khei+heu
Pe-pe+pea
he-.554.40m
F,-ouuQ
Actual water power of drilling pump
Water power per unit area of drill bit
Utilization rate of drilling and pumping water power
Total area of designed nozzle
N-1000V
3.22 Critical depth
3.22.1 Bingham fluid
a Working mode of maximum drill bit water power
b Working mode of maximum impact force
3.22.2 Violent fluid
SY/T 5234—91
/554.4pQ2
P:—ppc
0.357p.-Q1.-L.Q1-*
e 0.526p--hpQ1BhoL.Q18
a Maximum drill water rate working method
H.-.21+(n-2)(1.4-1ogn)
(a-+ReL)Q14+1-2(1.4-1021/7
Rori4+
b, Maximum impact force working method
2)(1.4-lo)7
(hs,+.L)Qt14+(n-2)(1.1-10*)/728+(n-2)(1. 4-1agn)
haQt+(n-21.4-10en /
3.23 Optimal displacement
3.23.1 Bingham fluid
a. Maximum drill water power working method
b, Maximum impact force working method
3.23.2 Power law fluid
a. Maximum drill water power working method
s+L+hl
2i+(n—2)(1.4-1agn)
b, Maximum impact force working method
4 Instructions for use of formula
4.1 Application
28+（(n=2)(1.4—10gn）
h+h,Le+h.Le
Used for the hydraulic parameter design of jet drilling and the hydraulic parameter analysis of jet drilling. 4.2 Notes
4—1agn?1
a: When calculating the pressure loss inside the drill pipe, if the inner diameter of the drill pipe joint is equal to the inner diameter of the drill pipe body or the ratio is greater than 85%, the formula can be used directly. If the ratio of the inner diameter of the joint to the inner diameter of the drill pipe body is between 85% and 0%, the joint length is accumulated together and the pressure loss is calculated separately as a section of the pipe, and then combined with the pressure loss of the drill pipe body as the drill pipe pressure loss. b. When calculating the critical depth and optimal displacement, no matter whether the air is in laminar flow or element flow state, the annulus element flow pressure loss coefficient must be substituted into the formula.
SY/T 5234--91
℃. The Bingham and Murray fluid calculation formulas given should be selected according to the drilling fluid type. 4.3 Calculation steps
4.3.1 Conventional hydraulic parameter settings, see A1 in Appendix A (reference). a. Purpose
Design displacement and nozzle size to fully utilize and reasonably distribute power. b. Divide the entire well into several sections according to the formation profile and drill bit footage, that is, determine the designed well depth. C. Select an appropriate pump type based on ground equipment and non-downhole conditions. The cylinder liner size selection sheet, that is, corresponding to the rated pump pressure r, the cheek fixed displacement is Qro
d. Select a certain maximum Optimal working mode.
e. There is a corresponding drilling fluid device suitable for jet drilling. f. Determine the drilling fluid flow pattern and calculate the rheological parameters of the drilling fluid. 9. Use the rated pump pressure and rated displacement of the primary selected cylinder sleeve to calculate the critical well depth H, and then compare it with the drilling depth H of the drill bit. If H≤H, then Q=Q, and the nozzle size is designed according to Qr and P. If H>H, after calculating Q, the nozzle size is designed according to QP (if Q is larger than the annular erosion displacement, the nozzle is designed according to a displacement smaller than the erosion displacement). Note: Only select combined nozzles and double nozzles. h Use Q. Calculate the annular purification coefficient f. . If /0.5, it meets the rock carrying requirements, otherwise repeat the steps Steps c and g, check again until the requirements are met.
i. Calculate other hydraulic parameters.
4.3.2 Hydraulic parameter analysis, see A2 in Appendix A (reference). a. Purpose
According to the measured data, conduct hydraulic parameter analysis while drilling and complete drilling data processing. b. Determine the drilling fluid flow pattern based on the measured viscometers readings and calculate the rheological parameters of the drilling fluid. c. Calculate the displacement based on the actual pump pressure, nozzle and other parameters using the iteration method. d. Calculate each hydraulic parameter.
Note 1 The calculation of hydraulic parameters should be completed on the computer by the hydraulic parameter design and analysis program of the jet drilling. 6
A1 Conventional hydraulic parameter design
A1.1 See Table A1 for general data
Aluminum head diameter
Design and segment
244.5mm casing depth
244.5mm casing flat groove inner diameter
Drill pipe outer diameter
Viscous cup inner diameter
Pin rod joint inner diameter
Drill chain outer diameter
Drill chain inner diameter
Drill collar length
Cuttings diameter
Old cuttings density
Drilling fluid density
Rotary viscometer reading 000
SY/T 5234-~91
Attached A
Example of calculation of hydraulic parameters of jet drilling
(reference)
D - 216mm
2810-3300m
D,=217mm
D,= 127mm
d.=108.6mm
D.=177.8mm
d,-71.4mm
L,-108m
Prc=2.5g/cm*
p-=1,20~1.25g/cma
40.00-45.01
25.0128.12
20.00~22.51
15.0116.87
For pump type selection, fixed displacement and drill bit penetration, please refer to Table A2Table A2
Rated power of pump
Set size
Rated pump||tt ||Green displacement range
First aluminum head drilling section
Second drill bit drilling section
Optimal working mode
Rated displacement
A1.3 Design of hydraulic parameters of the first drill bit
A1.3, 1 Determine the flow pattern and calculate the rheological parameters of drilling fluid Determine the flow pattern
P,=20.6MPa
28.0~33.11./s
28103100m
3100--3300m
Bulk drill bit water power
Q,38.1874L/s
Take the upper limit of the range of the fluid density and the rotational viscometer reading. Perform a one-dimensional regression on the shear stress under four shear rates. Bingham mode correlation coefficient: 1.000,
Law mode correlation coefficient: 0.992 g
Bingham fluid mode is selected.
b. Calculation of drilling fluid rheological parameters see Table A3
SY/T 5234—91
Used formula
Calculation of optimal displacement see Table A4 Table A4
Formula
Q=Q is calculated according to the specified displacement.
A1.3.3 Calculation of environmental purification coefficient see Table A5 Table A5
Used formula
(10), (11)
f0.5 displacement can meet the purification requirements. Re>2100 is turbulent flow. A1.3.4 Design nozzle
14.$mPa-s
7.49 ×10-4
2.564×10-5
1.919x10-
5.65×10-7
5.34×10-
2.453×10-5
3.13G×10-8
The total area of the suona is 230.86m1m2 from equation (42). The root saw combination nozzle is two small and large nozzles with a diameter ratio of less than 0.6. Two nozzles with a diameter of 7mm and one with a diameter of 14mm are installed, and the area is 230.911m2. It is also possible to install two nozzles of different or equal diameters, for example: one with a diameter of 10m and the other with a diameter of 14mn, and the area is 232.48. A1.3.5 For other parameters calculated at a well depth of 3100m, see Table A6 Table A6
Formula used
(14). (15),(16)(19).(23), (24)(28),(29),(30),(31).(32)
(33).(34)
148m/s
12.35*/mm*
SY/T 5234—91
N:/V, -D.71 is within the range required by the pump. The actual power of the pump should be less than 75% of the rated power of the pump and last for two hours. A1.4 Design of hydraulic parameters for the second drill bit
A1.4.1 Determine the flow pattern and calculate the rheological parameters of the drilling fluid a Determine the flow pattern
Take the lower limit of the drilling fluid density and the rotational viscometer reading. Perform a one-dimensional regression on the shear stress at four shear rates. Bingham model correlation coefficient: 1.000;
Power law model relationship coefficient: 0.992,
Select the Bingham fluid model.
b. Calculate the rheological parameters of the drilling fluid, see Table A7
Calculate the critical displacement, see Table A8. Table A8
When H>H. Drill at the optimal displacement.
A1.4.3 Calculation of annular purification coefficient See Table A9. The formula used can be the same as the formula used in A1.3.2. The formula used can be the same as the formula used in A1.3.3. The formula used can be the same as the formula used in A1.3.3. The formula used can be the same as the formula used in A1.3.3. The displacement can meet the purification requirements when the pressure >0.5. Rc2100 is the case flow. 16.89mFa - s
A1.4.4 Design of nozzle The nozzle area is 233.28m:m2 obtained by formula (42). Two nozzles with a diameter of 7mm and one with a diameter of 14.25mm are installed, and the area is 236.45mm2, or double nozzles are installed, for example: double nozzles with a diameter of 8.73nm and a point diameter of 15mm are installed, and the area is 236.57mm2. Before the depth of 3103m, Q=Q; at the depth of 3103m, the displacement is gradually reduced under the condition of maintaining pump pressure until the well depth of 3300m, the displacement is 31.1L/s.
A1.4.5 Calculate and other parameters at a depth of 3300:m, non-formula is the same as 41.3.5p=7.36Mpas
Pr=12.89MIus
P,=20.25MPa:
w --136r/s*
r--416kW;
W.--653kW
N.=11.35W/mm
F/-5498N
2 Hydraulic parameter analysis
Known conditions
Drill bit diameter:
Well depth:
Working pump pressure:
Average well diameter ：
Drill pipe outer diameter:
Drill pipe inner diameter:
Drill pipe joint inner diameter:
Drill chain outer diameter:
Drill chain inner diameter:
Drill chain length:
Cuttings diameterbzxz.net
Cuttings density:
Drill support fluid density:
Nozzle diameter:
Viscometer reading:
SY/T 5234—81
D=216mm
If=2900ms
P.-20.6MPa,
D=220mm
D=127mm*
dr=108.6nm
D=177.8mm;
de-71.4nr3
prc=2.58g/cm3,
Om-1.20g/cm,
Two with 7mm diameter and one with 13mm diameter, 9600=45.93
Oggn=27.14
020n-20.88;
610=16.70.
A2.2 Determine the flow pattern and calculate the rheological parameters of the drilling fluida. Determine the flow pattern
Bingham model correlation coefficient: 0.998
According to the law model relationship coefficient: 0.979,
Select the Bingham model.
b. Calculate the rheological parameters of the drilling fluid using formulas (1) and (2). μp-=18.79mPa - s
T,=4Pa
A2.3 Use substitution method to calculate displacement
A2.4 Calculate various parameters (the formula used is the same as A1.3.2, A1.3.3, A1.3.5)Pe.-6.15MPa:
P=14.45MPat
P,=20.6MPa:
j=147m/s:
Fy=-5467N:
Ng-446kW
W-637kW
7)—0.70
.=12.19W/mm2,
Da-1.219m/s 3
Re=2513;
W=0.142m/s#
f.=0.88.
SY/T5234--91
Additional remarks:
This standard is proposed by the Petroleum Drilling Technology Standardization Subcommittee and is managed by the Petroleum Drilling Process Professional Standardization Committee. This standard is under the responsibility of the Drilling Technology Research Institute of Shengli Petroleum Administration Bureau. The main drafters are Jin Xin and Cong Xiangsheng. 11
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