CN102425403A - Method for determining running-in depth of coaxial double-hollow sucker rod - Google Patents
Method for determining running-in depth of coaxial double-hollow sucker rod Download PDFInfo
- Publication number
- CN102425403A CN102425403A CN2011103434013A CN201110343401A CN102425403A CN 102425403 A CN102425403 A CN 102425403A CN 2011103434013 A CN2011103434013 A CN 2011103434013A CN 201110343401 A CN201110343401 A CN 201110343401A CN 102425403 A CN102425403 A CN 102425403A
- Authority
- CN
- China
- Prior art keywords
- oil
- coaxial
- pumping rod
- type double
- well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005086 pumping Methods 0.000 claims abstract description 107
- 239000003129 oil well Substances 0.000 claims abstract description 66
- 239000012530 fluid Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000012546 transfer Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 5
- 101100433727 Caenorhabditis elegans got-1.2 gene Proteins 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 126
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000010779 crude oil Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008014 freezing Effects 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract 2
- 238000009833 condensation Methods 0.000 abstract 1
- 238000013178 mathematical model Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 9
- 244000273618 Sphenoclea zeylanica Species 0.000 description 8
- 239000001993 wax Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000001112 coagulating effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241000252253 Catostomus Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The method for determining the setting depth of the coaxial double-hollow sucker rod is applied to high-condensation and high-wax crude oil wells in oil fields and oil extraction is carried out by utilizing the coaxial double-hollow sucker rod. Firstly, collecting oil well parameters for preparing to put in the coaxial double-hollow sucker rod and technical parameters of the coaxial double-hollow sucker rod; secondly, the collected parameters are brought into the mathematical model of the well. And obtaining a relation function of the outlet oil temperature C (x, t) of the well head, namely the setting depth of the coaxial double-hollow sucker rod. And then, according to the calculated depth D, the oil outlet temperature C of the well head and the working fluid level of the oil well, putting an oil well pipe column and an oil well rod column with a coaxial double hollow sucker rod. And finally, checking the suspension point load of the pumping unit. The effect is as follows: on the premise of meeting the maximum suspension point load of the oil pumping unit, the normal production of an oil well with the freezing point of more than 35 ℃ is realized; the effective time rate of the oil well is averagely improved by 13 percent, and the production running cost is saved.
Description
Technical field
The present invention relates to oil recovery technique field, oil field, particularly coagulate the high-wax oil well at height, utilize coaxial-type double hollow oil pumping rod oil recovery technique field, is a kind of method of definite coaxial-type double hollow oil pumping rod depth of setting.
Background technology
The high high-wax oil well that coagulates increases the oil pumper polished rod load in process of production easily, stops in power failure to rise again under the situation of well and takes out difficulty, has increased the difficulty of well maintenance.The coaxial-type double hollow oil pumping rod that in oil well, is lowered to certain depth can solve on-the-spot practical problem.But its depth of setting carries out often by rule of thumb, is unfavorable for that the height that improves oil well coagulates high-wax oil extraction effect.
The coaxial-type double hollow oil pumping rod is that Chinese patent ZL200820106412.3 is disclosed a kind of hollow rod.It is in the cavity of common hollow stem, to have designed an independently hollow passageway again, and terminal organ is linked up two passages, two way seal, and outer tube selects for use superior alloy steel to process; Interior pipe adopts the double-layer stainless steel body, fills space flight and uses the inorganic hollow particle, external application micron order combination polyurethane; The isolation layer coefficient of thermal conductivity is less than 0.02; Formed the closed circuit circulatory system of isolating fully with the outside, intrasystem heat transfer medium demineralized water does not get into pit shaft, only in two hollow stems, forms sealing and circulating; And demineralized water gets into when pipe is descending in the body of rod and will reduce heat waste as far as possible; When outer tube returns, pass through heat radiation, reduce high viscosity of coagulating high-wax oil, the high lifting effect of coagulating high-wax oil of raising the heating crude oil in the oil pipe.The very wide model of the heater means of heat transfer medium wherein is like sleeve pipe gas, air heat source pump, side het water's interchange of heat, fire coal, combustion gas, solar energy etc.
Lina WANG; Cui Jinbang; Circulating technology one literary composition in the double hollow oil pumping rod that Li Jinyong etc. deliver on 2010 the 4th phases oil-gas field surface engineering magazine; Through extensive investigation, find that all there is certain limitation in each item thickened oil recovery technology in application process to North China oil-field thick-oil lifting technology.In the coaxial-type double hollow oil pumping rod heating tech be applied in played in the thickened oil recovery energy-conservation, glutinous, as to reduce well-flushing expense purpose is fallen, solved the exploitation difficult problem of North China Oilfield part heavy oil wells.
Zhang Yong etc.; Two hollow stem closed cycle heating process one literary compositions that Li Xiaogang, Zhang Debin etc. are delivered on 2011 the 2nd phases oil-gas field surface engineering magazine, discussing two hollow stem closed circulation systems is for solving the pit shaft heating system that viscous crude and high pit shaft heating problems of coagulating oil design; It is made up of inside and outside two-layer hollow stem; Between inside and outside hollow stem, form fluid course, lean on the heat energy heating outer space core bar of flow, by outer space core bar heated oils well production fluid.Through this device applying on viscous crude and high-solidifiability oil well, efficiently solve the high-solidifiability oil well pit shaft and be prone to wax deposition and heavy oil wells production fluid viscosity problem of higher, see better effects after the application and prolonged oil well repair free period.
Effect to two hollow stems in the above-mentioned document has all carried out sufficient argumentation, but not mentioned coaxial-type double hollow oil pumping rod depth of setting.At present, the annexation of tubing string possesses, but does not have the technician can confirm the optimal degree of depth of coaxial-type double hollow oil pumping rod G.I.H, and everybody adopts and confirms depth of setting by rule of thumb.After dark down, increase the oil pumper suspending point loading; And cause the coaxial-type double hollow oil pumping rod to waste (price of coaxial-type double hollow oil pumping rod is 4 times of common sucker rod); The down shallow effect that does not have heating, oil well can not ordinary production.
Summary of the invention
The objective of the invention is: the method that a kind of definite coaxial-type double hollow oil pumping rod depth of setting is provided.Set up the Mathematical Modeling of well head oil outlet temperature and find the solution; Confirm that the coaxial-type double hollow oil pumping rod is lowered to the optimal degree of depth; Giving full play to the heat transfer medium demineralized water dispels the heat to the heating crude oil in the oil pipe when coaxial-type double hollow oil pumping rod outer tube returns; The high viscosity of coagulating high-wax oil of reduction overcomes when extraction is high coagulates high-wax oil the deficiency that lifting is difficult in pit shaft, energy consumption is high.
The present invention confirms the technical scheme that the method for coaxial-type double hollow oil pumping rod depth of setting is taked:
Step 1, collection prepare to be lowered to the oilwell parameter of coaxial-type double hollow oil pumping rod and the technical data of coaxial-type double hollow oil pumping rod:
The mass M of recirculated water in a, the every km coaxial-type double hollow oil pumping rod adopts: the 600kg/ km; The coaxial-type double hollow oil pumping rod has central passage and outer ring channel, and the mass M of interior recirculated water is a recycled-water quality M sum in two passages.
Heat transfer medium demineralized water flow rate Kv in b, the coaxial-type double hollow oil pumping rod calculates according to the circulation pump discharge capacity that well head is installed; The circulation pump delivery is 2m
3/ h, pump efficiency calculates by 60%; Cross sectional area is got 1/2nd of coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm
2
Its design formulas: Kv=4Q/ π D
2Q is the circulation pump delivery, unit: m
3/ h; D is a cross sectional area, gets 1/2nd of coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm
2
C, coaxial-type double hollow oil pumping rod depth of setting D, unit: m; It is the calculative degree of depth.
D, well mouth of oil well back pressure P, unit: MPa; Well mouth of oil well back pressure P confirms method: edit according to China National Petroleum Corporation (CNPC); China Plan Press publishes, in August, 2005 front page, State Standard of the People's Republic of China's oil-gas gathering and transportation design specifications; GB 50350-2005; The 10th page, during the 4.1.3 design, the highest permission back pressure of oil well is confirmed by following regulation: mechanical oil well is preferably 1.0-1.5MPa.When the mechanical oil well of stripper field adopted the pipeline collection defeated, wellhead back pressure can be 1.0-2.5MPa.
E, oil pipe cross sectional area A
c, unit: mm
2Be meant that internal diameter is the interior cross sectional area of heavy wall tubing of 76mm (external diameter 89mm); Oil pipe cross sectional area A
cGet 4534.16mm
2
F, coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm
2Get 1384.74mm
2
The formation temperature X of g, coaxial-type double hollow oil pumping rod lower end, unit: ℃; Refer to that coaxial-type double hollow oil pumping rod and external diameter are that 42mm becomes the ground temperature temperature of external diameter into the sucker rod change snapping head junction of 25mm, calculate according to geothermal gradient;
H, described coaxial-type double hollow oil pumping rod circulating water intake temperature t, unit: ℃.Be independent variable.
I, described well head oil outlet temperature C, unit: ℃; Be dependent variable.
Step 2, the Mathematical Modeling of bringing the parameter of gathering into oil well.Obtain well head oil outlet temperature C (x, relation function t).(degree of depth is the D in the Mathematical Modeling, because will could calculate through iterative method, and the corresponding wellhead temperature of the degree of depth, wellhead temperature need satisfy wellhead back pressure and oil outlet temperature again simultaneously)
Wherein:
C is the well head oil outlet temperature, unit: ℃;
M is the water yield of heat transfer medium demineralized water in the coaxial-type double hollow oil pumping rod, unit: kg/ km;
Kv is the flow rate of heat transfer medium demineralized water in the coaxial-type double hollow oil pumping rod;
D is a coaxial-type double hollow oil pumping rod depth of setting, unit: m;
∑ K
iFor the first order kinetics conversion rate, get 0.55～0.60;
P is the well mouth of oil well back pressure, unit: MPa;
K
HBe Henry's constant; During the solubility of Englishize scholar w. Henry learning gas in 1803 in liquid, sum up an empirical law, " under certain temperature and pressure, the solubility of a kind of gas in liquid is directly proportional with the balance pressure of this gas " refers to O here
2Henry's constant 4.40 * 10
6
Kp is a distribution factor; Refer under the uniform temperature that when being in equilibrium state, water and air are at fixing concentration and the ratio of the concentration in flowing phase in mutually;
A
cBe the oil pipe cross sectional area, unit: mm
2
S is a coaxial-type double hollow oil pumping rod cross sectional area, unit: mm
2
X is the temperature at coaxial-type double hollow oil pumping rod degree of depth place, unit: ℃;
T, coaxial-type double hollow oil pumping rod heat transfer medium demineralized water inlet temperature, unit: ℃.
Described well head oil outlet temperature C, concrete computational methods are through solution by iterative method.Iteration be in the numerical analysis through seek the process of a series of approximate solution solve problem (generally being to solve an equation or equation group) from initial estimation, be referred to as iterative method for realizing the employed method of this process.Iterative method is a kind of numerical computations processing method, is the method that the technician knows, and does not detail at this.
Step 3, according to depth of setting D and well head oil outlet temperature C and well fluid level that step 2 calculates, be lowered to oil well pipe and comprise with the oil well pole that has a coaxial-type double hollow oil pumping rod:
Oil well pipe is that heavy wall tubing, the external diameter of 89mm is that to become external diameter be that screen casing, the external diameter of 73mm is the starting taper of 73mm into the oil pipe of 73mm becomes snapping head, external diameter into plain end oil well pipe, oil well pump pump barrel, the external diameter of 73mm to 89mm from the well head external diameter that is threaded successively from top to bottom.
Oil well pole is that coaxial-type double hollow oil pumping rod, the external diameter of 42mm is that 42mm becomes external diameter into the sucker rod of 25mm becomes the snapping head, external diameter is the D grade pumping rod of 25mm, the HY grade pumping rod that external diameter is 22mm, HY grade pumping rod and the oil pump plunger piston that external diameter is 19mm from the well head external diameter that is threaded successively from top to bottom, and oil pump plunger piston is in the oil well pump pump barrel of oil well pipe.Hollow passageway and external hollow channel connection duct in the lower end of coaxial-type double hollow oil pumping rod has.The heat transfer medium demineralized water can flow into the external hollow passage from interior hollow passageway.
External diameter is that the depth of setting of the heavy wall tubing of 89mm is the long 100m of coaxial-type double hollow oil pumping rod of 42mm than corresponding external diameter.
Described pipe, bar, external diameter refer to the external diameter of body.
Well fluid level is recorded with echometer by the specialized operations personnel, is technician's the method that operating personnel knew.Oil well pump must descend below the well fluid level, and the 2nd, there has been the oil well pump depth of setting could confirm the suspending point loading of oil pumper.
Step 4, confirm coaxial-type double hollow oil pumping rod depth of setting after, check the oil pumper polished rod load.Check used ground oil pumper power and lifting force whether to satisfy the demand.
P
Max=P
Empty bar+ P
Bar+ P
Liquid+ P
f
In the formula: P
MaxBe MAXIMUM POLISHED ROD LOAD, t; P
Empty barBe the weight of coaxial-type double hollow oil pumping rod in liquid, t; P
BarBe the weight of common bar in liquid, t; P
LiquidFor acting on the fluid column load on the piston, t.
Summary has the oil well pipe of coaxial-type double hollow oil pumping rod and the oil production method of oil well pole.Demineralized water at first is warming up to about 85 ℃ through heat exchanger; Be forced into about 2.0MPa through circulation pump again, effectively cushioned, inject the interior hollow passageway of coaxial-type double hollow oil pumping rod polished rod and coaxial-type double hollow oil pumping rod through flow behind 5L surge tank, the 150L fluid reservoir; The heat transfer medium demineralized water is under the high drive of circulation pump; Overcome the tube wall frictional resistance, the lower end of heat transfer medium demineralized water high velocity stream to coaxial-type double hollow oil pumping rod flows into the external hollow passage in the lower end; Demineralized water passes through heat radiation to the heating crude oil in the oil pipe when outer tube returns; Flow returns to ground through annular space that heat exchanger (thermal source) heats once more then.
The effect that the present invention is useful: the present invention confirms the method for coaxial-type double hollow oil pumping rod depth of setting; Can confirm the optimal degree of depth of coaxial-type double hollow oil pumping rod G.I.H; Under the prerequisite that satisfies the maximum polished rod load of oil pumper, realized that freezing point is greater than 35 ℃ oil well, ordinary production; Not hotly wash, not dosing, rate on average improved 13 percentage points when oil well was effective, had saved the production run cost, had alleviated personnel labor.
The specific embodiment
Confirm that with Jin401Jing coaxial-type double hollow oil pumping rod depth of setting is an example, be elaborated.
Shanxi 401 well crude oil properties: density in the time of 20 ℃, 0.9164g/cm
3, 50 ℃ of viscosity 1148.3mPa.s, 41 ℃ at freezing point, paraffin content 25.8%.
Step 1, collection prepare to be lowered to the oilwell parameter of coaxial-type double hollow oil pumping rod and the technical data of coaxial-type double hollow oil pumping rod:
The weight M of recirculated water in a, the every km coaxial-type double hollow oil pumping rod adopts: the 600kg/ km; The mass M of interior recirculated water is a recycled-water quality M sum in two passages of coaxial-type double hollow oil pumping rod.
Heat transfer medium demineralized water flow rate Kv in b, the coaxial-type double hollow oil pumping rod calculates according to the circulation pump discharge capacity that well head is installed; The discharge capacity of circulation pump discharge capacity is 2m
3/ h, pump efficiency calculates by 60%; Cross sectional area is got 1/2nd of coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm
2Calculating Kv is: 0.9628m/s.
∑ K
iGet 0.55～0.60;
C, coaxial-type double hollow oil pumping rod depth of setting D, unit: m; By 700～1100m difference value, value is spaced apart 50m;
D, well mouth of oil well back pressure P, 1.0～1.5MPa is value respectively, and value is spaced apart 0.1MPa;
E, oil pipe cross sectional area A
c, get 4534.16mm
2
F, coaxial-type double hollow oil pumping rod cross sectional area S get 1384.74mm
2
The formation temperature X of g, coaxial-type double hollow oil pumping rod lower end calculates by 3.1 ℃/100m of geothermal gradient; Temperature t when managing in coaxial-type double hollow oil pumping rod heat transfer medium demineralized water gets into is by 85 ℃ of values.
H, described coaxial-type double hollow oil pumping rod circulating water intake temperature t, unit: ℃.Be independent variable.
I, described well head oil outlet temperature C, unit: ℃; Be dependent variable.
Step 2, the Mathematical Modeling of bringing the parameter of gathering into oil well.Obtain well head oil outlet temperature C (x, relation function t).(degree of depth is the D in the Mathematical Modeling, because will could calculate through iterative method, and the corresponding wellhead temperature of the degree of depth, wellhead temperature need satisfy wellhead back pressure and oil outlet temperature again simultaneously)
Wherein:
C is the well head oil outlet temperature, unit: ℃;
M is the water yield of heat transfer medium demineralized water in the coaxial-type double hollow oil pumping rod, unit: kg/ km;
Kv is the flow rate of heat transfer medium demineralized water in the coaxial-type double hollow oil pumping rod;
D is a coaxial-type double hollow oil pumping rod depth of setting, unit: m;
∑ K
iFor the first order kinetics conversion rate, get 0.55～0.60;
P is the well mouth of oil well back pressure, unit: MPa;
K
HBe Henry's constant; Get 4.40x 10
6
Kp is a distribution factor; Under referring to 50-80 ℃, when being in equilibrium state, component gets 1.0 at fixing concentration and the ratio of the concentration in flowing phase in mutually
A
cBe the oil pipe cross sectional area, unit: mm
2
S is a coaxial-type double hollow oil pumping rod cross sectional area, unit: mm
2
X is the temperature at coaxial-type double hollow oil pumping rod degree of depth place, unit: ℃;
T, coaxial-type double hollow oil pumping rod heat transfer medium demineralized water inlet temperature, unit: ℃.
Shanxi 401 well solution by iterative method tables of data
Show through solution by iterative method.Shanxi 401 well coaxial-type double hollow oil pumping rod depth of settings are between 800～900m, can satisfy the production requirement that freezing point is 41 ℃ of crude oil.Freezing point is that 41 ℃ crude oil well head oil outlet temperature must be greater than this other temperature.
Step 3, according to depth of setting D and well head oil outlet temperature C and well fluid level that step 2 calculates, be lowered to oil well pipe and comprise with the oil well pole that has a coaxial-type double hollow oil pumping rod:
Oil well pipe is that the heavy wall tubing length of 89mm is 950m from the well head external diameter that is threaded successively from top to bottom, and the degree of depth bottom of 89mm heavy wall tubing is 950m; External diameter is that 89mm becomes external diameter and is 0.5m into the oil pipe of 73mm becomes snapping head length degree, and the degree of depth bottom that becomes the snapping head is 950.5m; External diameter is that the plain end oil well pipe length of 73mm is 1039.5m, external diameter be 73mm plain end oil well pipe bottom the degree of depth be 1990m; Oil well pump pump barrel length is 7.76m, and the degree of depth bottom of oil well pump pump barrel is 1997.76m; External diameter is that the screen casing length of 73mm is 19.27m, external diameter be 73mm screen casing bottom the degree of depth be 2017.03m; External diameter is that the starting taper length of 73mm is 20.41m, and external diameter is that the lower end degree of depth of the starting taper of 73mm is 2037.44m.
Oil well pole is that the coaxial-type double hollow oil pumping rod length of 42mm is 858.76m from the well head external diameter that is threaded successively from top to bottom, and external diameter is that the degree of depth bottom of the coaxial-type double hollow oil pumping rod of 42mm is 858.76m; External diameter is that 42mm becomes external diameter and is 0.5m into the sucker rod of 25mm becomes snapping head length degree, and the degree of depth bottom that sucker rod becomes the snapping head is 859.26m; External diameter is that the D grade pumping rod length of 25mm is 40m, external diameter be 25mm the D grade pumping rod bottom the degree of depth be 899.26m; External diameter is that the HY grade pumping rod length of 22mm is 1089m, and external diameter is the HY grade pumping rod degree of depth 1988.26m bottom of 22mm; External diameter is that the HY grade pumping rod length of 19mm is 8m, and external diameter is that the degree of depth bottom of the HY grade pumping rod of 19mm is 1996.26m; Oil pump plunger piston length is 1.5m, and the degree of depth bottom of oil pump plunger piston is 1997.76m.Oil pump plunger piston is in the oil well pump pump barrel of oil well pipe.Hollow passageway and external hollow channel connection duct in the lower end of coaxial-type double hollow oil pumping rod has.The heat transfer medium demineralized water can flow into the external hollow passage from interior hollow passageway.
External diameter is that the depth of setting of the heavy wall tubing of 89mm is the long 100m of coaxial-type double hollow oil pumping rod of 42mm than corresponding external diameter.
Step 4, confirm coaxial-type double hollow oil pumping rod depth of setting after, check the oil pumper polished rod load.
P
Max=P
Empty bar+ P
Bar+ P
Liquid+ P
f
Through checking hollow stem depth of setting 800～1000m, following pump degree of depth 1997.76m, oil pumper polished rod load are at 8.93t, and 14 types oil pumping function satisfies production requirement.
After Jin401Jing rises and takes out, 24 hours continuous ordinary production of oil well have been realized; Oil well is not warm to be washed, not dosing, and rate on average improved 14.1 percentage points when oil well was effective, had alleviated personnel labor.
Claims (1)
1. the method for a definite coaxial-type double hollow oil pumping rod depth of setting is characterized in that:
Step 1, collection prepare to be lowered to the oilwell parameter of coaxial-type double hollow oil pumping rod and the technical data of coaxial-type double hollow oil pumping rod:
The mass M of recirculated water in a, the every km coaxial-type double hollow oil pumping rod adopts: the 600kg/ km;
Heat transfer medium demineralized water flow rate Kv in b, the coaxial-type double hollow oil pumping rod calculates according to the circulation pump discharge capacity that well head is installed; The circulation pump delivery is 2m
3/ h, pump efficiency calculates by 60%; Cross sectional area is got 1/2nd of coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm
2Its design formulas: Kv=4Q/ π D
2Q is the circulation pump delivery, unit: m
3/ h; D is a cross sectional area;
C, coaxial-type double hollow oil pumping rod depth of setting D, unit: m;
D, well mouth of oil well back pressure P, unit: MPa; Well mouth of oil well back pressure P confirms as 1.0-1.5MPa.
E, oil pipe cross sectional area A
c, unit: mm
2Be meant that internal diameter is 76mm, cross sectional area in the heavy wall tubing of external diameter 89mm; Oil pipe cross sectional area A
cGet 4534.16mm
2
F, coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm
2Get 1384.74mm
2
The formation temperature X of g, coaxial-type double hollow oil pumping rod lower end, unit: ℃;
H, coaxial-type double hollow oil pumping rod circulating water intake temperature t, unit: ℃;
I, well head oil outlet temperature C, unit: ℃;
Step 2, the Mathematical Modeling of bringing the parameter of gathering into oil well.Obtain well head oil outlet temperature C (x, relation function t).(degree of depth is the D in the Mathematical Modeling, because will could calculate through iterative method, and the corresponding wellhead temperature of the degree of depth, wellhead temperature need satisfy wellhead back pressure and oil outlet temperature again simultaneously)
Wherein:
C is the well head oil outlet temperature, unit: ℃;
M is the water yield of heat transfer medium demineralized water in the coaxial-type double hollow oil pumping rod, unit: kg/ km;
Kv is the flow rate of heat transfer medium demineralized water in the coaxial-type double hollow oil pumping rod;
D is a coaxial-type double hollow oil pumping rod depth of setting, unit: m;
∑ K
iFor the first order kinetics conversion rate, get 0.55～0.60;
P is the well mouth of oil well back pressure, unit: MPa;
K
HBe Henry's constant; Here refer to O
2Henry's constant 4.40 * 10
6
Kp is a distribution factor;
A
cBe the oil pipe cross sectional area, unit: mm
2
S is a coaxial-type double hollow oil pumping rod cross sectional area, unit: mm
2
X is the temperature at coaxial-type double hollow oil pumping rod degree of depth place, unit: ℃;
T, coaxial-type double hollow oil pumping rod heat transfer medium demineralized water inlet temperature, unit: ℃.
Step 3, according to depth of setting D and well head oil outlet temperature C and well fluid level that step 2 calculates, be lowered to oil well pipe and comprise with the oil well pole that has a coaxial-type double hollow oil pumping rod:
Oil well pipe is that heavy wall tubing, the external diameter of 89mm is that to become external diameter be that screen casing, the external diameter of 73mm is the starting taper of 73mm into the oil pipe of 73mm becomes snapping head, external diameter into plain end oil well pipe, oil well pump pump barrel, the external diameter of 73mm to 89mm from the well head external diameter that is threaded successively from top to bottom.
Oil well pole is that coaxial-type double hollow oil pumping rod, the external diameter of 42mm is that 42mm becomes external diameter into the sucker rod of 25mm becomes the snapping head, external diameter is the D grade pumping rod of 25mm, the HY grade pumping rod that external diameter is 22mm, HY grade pumping rod and the oil pump plunger piston that external diameter is 19mm from the well head external diameter that is threaded successively from top to bottom, and oil pump plunger piston is in the oil well pump pump barrel of oil well pipe.Hollow passageway and external hollow channel connection duct in the lower end of coaxial-type double hollow oil pumping rod has.The heat transfer medium demineralized water can flow into the external hollow passage from interior hollow passageway.
External diameter is that the depth of setting of the heavy wall tubing of 89mm is the long 100m of coaxial-type double hollow oil pumping rod of 42mm than corresponding external diameter.
Step 4, confirm coaxial-type double hollow oil pumping rod depth of setting after, check the oil pumper polished rod load.Check used ground oil pumper power and lifting force whether to satisfy the demand.
P
Max=P
Empty bar+ P
Bar+ P
Liquid+ P
f
In the formula: P
MaxBe MAXIMUM POLISHED ROD LOAD, t; P
Empty barBe the weight of coaxial-type double hollow oil pumping rod in liquid, t; P
BarBe the weight of common bar in liquid, t; P
LiquidFor acting on the fluid column load on the piston, t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110343401.3A CN102425403B (en) | 2011-11-03 | 2011-11-03 | Method for determining running-in depth of coaxial double-hollow sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110343401.3A CN102425403B (en) | 2011-11-03 | 2011-11-03 | Method for determining running-in depth of coaxial double-hollow sucker rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102425403A true CN102425403A (en) | 2012-04-25 |
| CN102425403B CN102425403B (en) | 2014-08-06 |
Family
ID=45959428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110343401.3A Active CN102425403B (en) | 2011-11-03 | 2011-11-03 | Method for determining running-in depth of coaxial double-hollow sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102425403B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040264A1 (en) * | 2012-09-14 | 2014-03-20 | 中国石油天然气股份有限公司 | Method and system for measuring dynamic liquid level of oil well |
| CN104100504A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Method for determining anti-impact distance of screw pump of coaxial double-hollow sucker rod for cold production of thick oil |
| CN104481510A (en) * | 2014-12-10 | 2015-04-01 | 马瑞程 | Method for determining setting depth of heating cable passing hollow sucker rod |
| CN104653455A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Method for adjusting axial clearance between stator and rotor of screw pump |
| CN105443052A (en) * | 2014-08-27 | 2016-03-30 | 中国石油天然气股份有限公司 | Method for determining running-in depth of hollow sucker rod for oil well flushing |
| CN107191139A (en) * | 2017-07-10 | 2017-09-22 | 中国石油天然气股份有限公司 | Method and device for determining penetration depth of heat-preservation heat-insulation eccentric wear-prevention oil pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201074584Y (en) * | 2007-07-10 | 2008-06-18 | 中国石油天然气股份有限公司 | Down-hole oil pumping load-reducing tool |
| CN101955765A (en) * | 2010-08-05 | 2011-01-26 | 中国石油天然气股份有限公司 | Flushing fluid for oil well with lined oil pipe |
| CN201738858U (en) * | 2010-07-22 | 2011-02-09 | 中国石油天然气股份有限公司 | Sucker rod overshot |
| CN201915852U (en) * | 2010-12-23 | 2011-08-03 | 中国石油天然气股份有限公司 | High wax content oil well oil pumping pipe column |
| CN201934068U (en) * | 2010-12-28 | 2011-08-17 | 中国石油天然气股份有限公司 | Rod string for preventing eccentric wear of pumping well |
| CN102168551A (en) * | 2011-01-19 | 2011-08-31 | 杨平 | Device and method for continuously measuring working fluid level depth of oil well and continuously metering produced liquid |
-
2011
- 2011-11-03 CN CN201110343401.3A patent/CN102425403B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201074584Y (en) * | 2007-07-10 | 2008-06-18 | 中国石油天然气股份有限公司 | Down-hole oil pumping load-reducing tool |
| CN201738858U (en) * | 2010-07-22 | 2011-02-09 | 中国石油天然气股份有限公司 | Sucker rod overshot |
| CN101955765A (en) * | 2010-08-05 | 2011-01-26 | 中国石油天然气股份有限公司 | Flushing fluid for oil well with lined oil pipe |
| CN201915852U (en) * | 2010-12-23 | 2011-08-03 | 中国石油天然气股份有限公司 | High wax content oil well oil pumping pipe column |
| CN201934068U (en) * | 2010-12-28 | 2011-08-17 | 中国石油天然气股份有限公司 | Rod string for preventing eccentric wear of pumping well |
| CN102168551A (en) * | 2011-01-19 | 2011-08-31 | 杨平 | Device and method for continuously measuring working fluid level depth of oil well and continuously metering produced liquid |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040264A1 (en) * | 2012-09-14 | 2014-03-20 | 中国石油天然气股份有限公司 | Method and system for measuring dynamic liquid level of oil well |
| CN104100504A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Method for determining anti-impact distance of screw pump of coaxial double-hollow sucker rod for cold production of thick oil |
| CN104653455A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Method for adjusting axial clearance between stator and rotor of screw pump |
| CN104653455B (en) * | 2013-11-19 | 2016-09-07 | 中国石油天然气股份有限公司 | Method for adjusting axial clearance between stator and rotor of screw pump |
| CN105443052A (en) * | 2014-08-27 | 2016-03-30 | 中国石油天然气股份有限公司 | Method for determining running-in depth of hollow sucker rod for oil well flushing |
| CN105443052B (en) * | 2014-08-27 | 2017-10-17 | 中国石油天然气股份有限公司 | Method for determining running-in depth of hollow sucker rod for oil well flushing |
| CN104481510A (en) * | 2014-12-10 | 2015-04-01 | 马瑞程 | Method for determining setting depth of heating cable passing hollow sucker rod |
| CN104481510B (en) * | 2014-12-10 | 2017-09-29 | 马瑞程 | A kind of method for determining heating cable for hollow oil-pumping rod depth of setting |
| CN107191139A (en) * | 2017-07-10 | 2017-09-22 | 中国石油天然气股份有限公司 | Method and device for determining penetration depth of heat-preservation heat-insulation eccentric wear-prevention oil pipe |
| CN107191139B (en) * | 2017-07-10 | 2018-12-25 | 中国石油天然气股份有限公司 | Method and device for determining penetration depth of heat-preservation heat-insulation eccentric wear-prevention oil pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102425403B (en) | 2014-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102425403B (en) | Method for determining running-in depth of coaxial double-hollow sucker rod | |
| CN105043933B (en) | A kind of high parameter fracturing fluid property test evaluation device | |
| CN104832131B (en) | Method for selecting optimum oil collecting parameters based on whole mechanical production and oil collecting systems | |
| CN103362476A (en) | Casing type downhole heat exchanger heating system capable of preventing wall of producing well from paraffin precipitation | |
| CN105443052B (en) | Method for determining running-in depth of hollow sucker rod for oil well flushing | |
| CN105980655A (en) | A method for preventing wax deposition in oil wells with packers | |
| CA2931882C (en) | Method for forced steam cycle preheating dual horizontal well in middle-deep layer reservoir under a constant temperature difference | |
| CN208330322U (en) | Thick oil thermal recovery tubular column | |
| CN202560168U (en) | Hollow rod well flushing device for oil well | |
| CN201297164Y (en) | Energy-saving and viscosity-reducing device for producing oil from viscous oil well with hollow rod using heat carrier for obturating and circulating | |
| CN203383786U (en) | Closed-loop water distribution, ground watering and pressurization output integrated device | |
| CN101550821A (en) | Oil recovery method of closed circulation and viscosity breakback of hot oil in viscous oil well and device | |
| CN203201533U (en) | Electric heating rod wax-removal and viscosity-reduction device for oil well | |
| CN104481510B (en) | A kind of method for determining heating cable for hollow oil-pumping rod depth of setting | |
| CN101634219B (en) | Electromagnetic heating device for oil well | |
| CN101298834A (en) | Ultralong pumping rod hot pipe assembly with high heat transfer characteristic | |
| CN204283341U (en) | A kind of sucker rod pump sealing and circulating water mixing wax-proofing apparatus | |
| CN201218093Y (en) | Thick oil borehole viscosity-reduction oil-extraction heating apparatus | |
| CN207686693U (en) | Oil production pipe and thickened oil exploitation device | |
| CN203161195U (en) | Oil well injection allocation thermal recovery device | |
| CN201165865Y (en) | Oil well thermal cycle oil extraction apparatus | |
| CN201190559Y (en) | Ultralong sucker rod heat pipe assembly with high heat transfer characteristic | |
| CN209195385U (en) | Thickened oil recovery device and thickened oil recovery system | |
| CN201173110Y (en) | Oil pumping equipment with hot pipe type pumping rod | |
| CN202560167U (en) | An oil recovery low-frequency pulse electromagnetic paraffin control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |