CN102425403B - Method for determining setting depth of coaxial double hollow sucker rods - Google Patents

Method for determining setting depth of coaxial double hollow sucker rods Download PDF

Info

Publication number
CN102425403B
CN102425403B CN201110343401.3A CN201110343401A CN102425403B CN 102425403 B CN102425403 B CN 102425403B CN 201110343401 A CN201110343401 A CN 201110343401A CN 102425403 B CN102425403 B CN 102425403B
Authority
CN
China
Prior art keywords
oil
coaxial
double hollow
pumping rod
type double
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.)
Active
Application number
CN201110343401.3A
Other languages
Chinese (zh)
Other versions
CN102425403A (en
Inventor
付亚荣
刘春平
付茜
李冬青
李淼
李国栋
龙政军
徐茂桐
付丽霞
文云飞
姜一超
李小永
曹俊杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Natural Gas Co Ltd
Original Assignee
China Petroleum and Natural Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Petroleum and Natural Gas Co Ltd filed Critical China Petroleum and Natural Gas Co Ltd
Priority to CN201110343401.3A priority Critical patent/CN102425403B/en
Publication of CN102425403A publication Critical patent/CN102425403A/en
Application granted granted Critical
Publication of CN102425403B publication Critical patent/CN102425403B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to a method for determining the setting depth of coaxial double hollow sucker rods, and is applied to a high-setting point and high-wax crude oil well in an oilfield and utilizes the coaxial double hollow sucker rods for oil production. The method comprises the following steps: firstly, acquiring the parameters of the oil well which is ready to set the coaxial double hollow sucker rods and the technical parameters of the coaxial double hollow sucker rods; secondly, putting the acquired parameters into a mathematical model of the oil well; getting a relation function of the temperature C (x, t) of outlet oil at a well mouth, and further getting the setting depth of the coaxial double hollow sucker rods; then setting an oil well pipe column and an oil well rod column with the coaxial double hollow sucker rods according to the calculated setting depth D, the temperature C of the outlet oil at the well mouth and the working fluid level of the oil well; and finally checking the polished rod load of an oil pumping machine. The method has the effects of realizing the normal production of the oil well with the setting point which is higher than 35 DEG C on the premise of meeting the maximum polished rod load of the oil pumping machine, the effective time efficiency of the oil well is improved by 13% on average and the production and operation cost is further saved.

Description

A kind of method of definite setting depth of coaxial double hollow sucker rods
Technical field
The present invention relates to oil extraction in oil field technical field, particularly, at the solidifying high-wax oil well of height, utilize coaxial-type double hollow oil pumping rod oil recovery technique field, is a kind of method of definite setting depth of coaxial double hollow sucker rods.
Background technology
High solidifying high-wax oil well easily increases oil pumping machine polished rod load in process of production, in the situation that power failure stops well, again rises and takes out difficulty, has increased the difficulty of well maintenance.The coaxial-type double hollow oil pumping rod that is lowered to certain depth in oil well can solve practical site problems.But its depth of setting carries out often by rule of thumb, be unfavorable for improving the solidifying high-wax oil extraction effect of height of oil well.
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 again an independently hollow passageway, and terminal organ is linked up two passages, two way seal, and outer tube selects superior alloy steel to process; Inner tube adopts double-layer stainless steel body, fill space flight inorganic hollow particle, external application micron order combination polyurethane, isolation layer coefficient of thermal conductivity is less than 0.02, form the closed circuit circulatory system of isolating completely with outside, intrasystem heat transfer medium demineralized water does not enter pit shaft, only in two hollow stems, form sealing and circulating, and demineralized water enters body of rod inner tube and will reduce heat waste when descending as far as possible, while returning from outer tube, pass through heat radiation to the heating crude oil in oil pipe, reduce the viscosity of high solidifying high-wax oil, improve the lifting effect of high solidifying high-wax oil.The wherein very wide model of the heater means of heat transfer medium, as casing gas, air heat source pump, side het water's interchange of heat, fire coal, combustion gas, solar energy etc.
Lina WANG, Cui Jinbang, Li Jinyong etc. are circulating technology one literary composition in the double hollow oil pumping rod of delivering on the 4th phase oil-gas field surface engineering magazine for 2010, by the extensive investigation to North China oil-field thick-oil lifting technology, find that every thickened oil recovery technology all has some limitations in application process.In coaxial-type double hollow oil pumping rod heating tech be applied in thickened oil recovery, played energy-conservation, glutinous, to reduce well-flushing expense object is fallen, solved an exploitation difficult problem for North China Oilfield part heavy oil wells.
Zhang Yong etc., Li Xiaogang, two hollow stem closed cycle heating process one literary composition that Zhang Debin etc. delivered on the 2nd phase oil-gas field surface engineering magazine in 2011, discussing two hollow stem closed circulation systems is the pit shaft heating systems that design for solving viscous crude and high solidifying oily pit shaft heating problems, it is made up of inside and outside two-layer hollow stem, between inside and outside hollow stem, form fluid course, by the heat energy heating outer space core bar of liquid stream, by outer space core bar heating oil well production fluid.The applying on viscous crude and high-solidifiability oil well by this device, efficiently solves the easy wax deposition of high-solidifiability oil well pit shaft and the higher problem of heavy oil wells production fluid viscosity, sees better effects and extended oil well repair free period after application.
In above-mentioned document, the effect of two hollow stems is all carried out to sufficient discussion, but not mentioned setting depth of coaxial double hollow sucker rods.At present, the annexation of tubing string possesses, but does not have technician can determine the optimal degree of depth of coaxial-type double hollow oil pumping rod G.I.H, and everybody adopts and determines by rule of thumb depth of setting.Lower dark after, increase pumping unit hanging point load; And cause 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 lower shallow effect that does not have heating, oil well can not normally be produced.
Summary of the invention
The object of the invention is: a kind of method that definite setting depth of coaxial double hollow sucker rods is provided.Set up the Mathematical Modeling of well head oil outlet temperature and solve, determine that coaxial-type double hollow oil pumping rod is lowered to the optimal degree of depth, give full play to when heat transfer medium demineralized water returns from coaxial-type double hollow oil pumping rod outer tube and dispel the heat to the heating crude oil in oil pipe, reduce the viscosity of high solidifying high-wax oil, while overcoming the high solidifying high-wax oil of extraction, lifting difficulty, deficiency that energy consumption is high in pit shaft.
The present invention determines the technical scheme that the method for setting depth of coaxial double hollow sucker rods 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, every km coaxial-type double hollow oil pumping rod, adopts: 600kg/ km; Coaxial-type double hollow oil pumping rod has central passage and outer ring channel, and the mass M of interior recirculated water is recycled-water quality M sum in two passages.
Heat transfer medium demineralized water flow rate Kv in b, coaxial-type double hollow oil pumping rod, the circulation pump discharge capacity account of installing according to well head; 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 2; Q is circulation pump delivery, unit: m 3/ h; D is cross sectional area, gets 1/2nd of coaxial-type double hollow oil pumping rod cross sectional area S, unit: mm 2;
C, setting depth of coaxial double hollow sucker rods 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 determines method: edit according to China National Petroleum Corporation (CNPC), Plan Press of China publishes, in August, 2005 first edition, National Standard of the People's Republic of China's oil-gas gathering and transportation design specifications, GB 50350-2005, the 10th page, when 4.1.3 design, the highest permission back pressure of oil well is determined by following regulation: mechanical oil well is preferably 1.0-1.5MPa.When the mechanical oil well of stripper field adopts pipeline collection defeated, wellhead back pressure can be 1.0-2.5MPa.
E, oil pipe cross sectional area A c, unit: mm 2; Refer to 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 2; Get 1384.74mm 2;
The formation temperature X of g, coaxial-type double hollow oil pumping rod lower end, unit: DEG C; Refer to that coaxial-type double hollow oil pumping rod and external diameter are the ground temperature temperature that 42mm becomes the sucker rod variable buckle joint junction that external diameter is 25mm, calculate according to geothermal gradient;
H, described coaxial-type double hollow oil pumping rod circulating water intake temperature t, unit: DEG C.For independent variable.
I, described well head oil outlet temperature C, unit: DEG C; For dependent variable.
Step 2, the Mathematical Modeling of the parameter of collection being brought into oil well.Obtain the relation function of well head oil outlet temperature C (x, t).(degree of depth is the D in Mathematical Modeling, because will could calculate by iterative method, and a corresponding wellhead temperature of the degree of depth, wellhead temperature needs again to meet wellhead back pressure and oil outlet temperature simultaneously)
c ( x , t ) = M 2 A c ( πDt ) 1 / 2 exp { - ( x + k v t ) 2 4 Dt - K e t ) } - K V ′ K V ′ + Σ K i · P K H [ 1 + exp ( - K e t ) ]
Wherein:
C is well head oil outlet temperature, unit: DEG C;
K e = K V ′ + Σ K i 1 + K p S
M is the water yield of heat transfer medium demineralized water in coaxial-type double hollow oil pumping rod, unit: kg/ km;
K V ′ = K v / D ;
Kv is the flow rate of heat transfer medium demineralized water in coaxial-type double hollow oil pumping rod;
D is setting depth of coaxial double hollow sucker rods, unit: m;
∑ K ifor first order kinetics conversion rate, get 0.55～0.60;
P is well mouth of oil well back pressure, unit: MPa;
K hfor Henry's constant; When the solubility of Englishize scholar w. Henry learning gas in 1803 in liquid, sum up an empirical law, " at certain temperature and pressure, the solubility of a kind of gas in liquid is directly proportional to the equilibrium pressure of this gas ", refers to O here 2henry's constant 4.40 × 10 6;
Kp is distribution factor; Refer under uniform temperature, in the time of equilibrium state, water and air are at the ratio of fixing concentration in mutually and the concentration in mobile phase;
A cfor oil pipe cross sectional area, unit: mm 2;
S is coaxial-type double hollow oil pumping rod cross sectional area, unit: mm 2;
X is the temperature of coaxial-type double hollow oil pumping rod depth, unit: DEG C;
T, coaxial-type double hollow oil pumping rod heat transfer medium demineralized water inlet temperature, unit: DEG C.
Described well head oil outlet temperature C, circular is to pass through solution by iterative method.Iteration be in numerical analysis by solve the process of problem (being generally to solve an equation or equation group) from a series of approximate solutions of initial estimation set off in search, be referred to as iterative method for realizing the method that this process uses.Iterative method is a kind of numerical computations processing method, is the known method of technician, does not describe in detail at this.
Step 3, the depth of setting D calculating according to step 2 and well head oil outlet temperature C and well fluid level, be lowered to oil well pipe and comprise with the oil well pole of coaxial-type double hollow oil pumping rod:
Oil well pipe is that heavy wall tubing, the external diameter of 89mm is that 89mm becomes the screen casing that oil pipe variable buckle joint that external diameter is 73mm, plain end oil well pipe, oil pump sleeve, external diameter that external diameter is 73mm are 73mm, the starting taper that external diameter is 73mm 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 the sucker rod variable buckle joint that external diameter is 25mm, the D grade pumping rod that external diameter is 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 pump sleeve of oil well pipe.There are interior hollow passageway and external hollow channel connection duct in the lower end of coaxial-type double hollow oil pumping rod.Heat transfer medium demineralized water can flow into external hollow passage from interior hollow passageway.
External diameter is the long 100m of coaxial-type double hollow oil pumping rod that the depth of setting of the heavy wall tubing of 89mm is 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 specialized operations personnel, is technician's the known method of operating personnel.Oil well pump must descend below well fluid level, and the 2nd, there is oil well pump depth of setting could determine the suspending point loading of oil pumper.
Step 4, determine after setting depth of coaxial double hollow sucker rods, check oil pumping machine polished rod load.Whether inspection institute satisfies the demand with ground pumping unit power and lifting force.
P max=P empty bar+ P bar+ P liquid+ P f
In formula: P maxfor MAXIMUM POLISHED ROD LOAD, t; P empty barfor the weight of coaxial-type double hollow oil pumping rod in liquid, t; P barfor the weight of common bar in liquid, t; P liquidfor acting on the fluid column load on piston, t.
Summary is with the oil well pipe of coaxial-type double hollow oil pumping rod and the oil production method of oil well pole.First demineralized water is warming up to 85 DEG C of left and right through heat exchanger, be forced into 2.0MPa left and right through circulation pump again, after 5L surge tank, 150L fluid reservoir, liquid stream is 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, heat transfer medium demineralized water is under the high drive of circulation pump, overcome tube wall frictional resistance, heat transfer medium demineralized water high velocity stream, to the lower end of coaxial-type double hollow oil pumping rod, flows into external hollow passage in lower end; When returning from outer tube, passes through demineralized water heat radiation to the heating crude oil in oil pipe; Then liquid stream is returned to ground heat exchanger (thermal source) and is again heated by annular space.
The effect that the present invention is useful: the present invention determines the method for setting depth of coaxial double hollow sucker rods, can determine the optimal degree of depth of coaxial-type double hollow oil pumping rod G.I.H, meeting under the prerequisite of the maximum polished rod load of oil pumper, realize the oil well that freezing point is greater than 35 DEG C, normally produce; Not hotly wash, not dosing, when oil well is effective, rate on average improves 13 percentage points, has saved production run cost, has alleviated employee's labour intensity.
Detailed description of the invention
Determine that taking Jin401Jing setting depth of coaxial double hollow sucker rods, as example, is elaborated.
Shanxi 401 well crude oil properties: density 20 DEG C time, 0.9164g/cm 3, 50 DEG C of viscosity 1148.3mPa.s, 41 DEG C, 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, every km coaxial-type double hollow oil pumping rod, adopts: 600kg/ km; The mass M of interior recirculated water is 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, coaxial-type double hollow oil pumping rod, the circulation pump discharge capacity account of installing according to well head; 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 2; Calculating Kv is: 0.9628m/s.
∑ K iget 0.55～0.60;
C, setting depth of coaxial double hollow sucker rods D, unit: m; By 700～1100m value respectively, 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 DEG C/100m of geothermal gradient; Temperature t when coaxial-type double hollow oil pumping rod heat transfer medium demineralized water enters inner tube is by 85 DEG C of values.
H, described coaxial-type double hollow oil pumping rod circulating water intake temperature t, unit: DEG C.For independent variable.
I, described well head oil outlet temperature C, unit: DEG C; For dependent variable.
Step 2, the Mathematical Modeling of the parameter of collection being brought into oil well.Obtain the relation function of well head oil outlet temperature C (x, t).(degree of depth is the D in Mathematical Modeling, because will could calculate by iterative method, and a corresponding wellhead temperature of the degree of depth, wellhead temperature needs again to meet wellhead back pressure and oil outlet temperature simultaneously)
c ( x , t ) = M 2 A c ( πDt ) 1 / 2 exp { - ( x + k v t ) 2 4 Dt - K e t ) } - K V ′ K V ′ + Σ K i · P K H [ 1 + exp ( - K e t ) ]
Wherein:
C is well head oil outlet temperature, unit: DEG C;
K e = K V ′ + Σ K i 1 + K p S
M is the water yield of heat transfer medium demineralized water in coaxial-type double hollow oil pumping rod, unit: kg/ km;
K V ′ = K v / D ;
Kv is the flow rate of heat transfer medium demineralized water in coaxial-type double hollow oil pumping rod;
D is setting depth of coaxial double hollow sucker rods, unit: m;
∑ K ifor first order kinetics conversion rate, get 0.55～0.60;
P is well mouth of oil well back pressure, unit: MPa;
K hfor Henry's constant; Get 4.40x 10 6;
Kp is distribution factor; At referring to 50-80 DEG C, in the time of equilibrium state, the ratio of the concentration of component in fixing mutually and the concentration in mobile phase, gets 1.0
A cfor oil pipe cross sectional area, unit: mm 2;
S is coaxial-type double hollow oil pumping rod cross sectional area, unit: mm 2;
X is the temperature of coaxial-type double hollow oil pumping rod depth, unit: DEG C;
T, coaxial-type double hollow oil pumping rod heat transfer medium demineralized water inlet temperature, unit: DEG C.
Shanxi 401 well solution by iterative method tables of data
Show by solution by iterative method.Shanxi 401 well setting depth of coaxial double hollow sucker rods are between 800～900m, can meet the production requirement that freezing point is 41 DEG C of crude oil.Freezing point is that the crude oil well head oil outlet temperature of 41 DEG C must be greater than this other temperature.
Step 3, the depth of setting D calculating according to step 2 and well head oil outlet temperature C and well fluid level, be lowered to oil well pipe and comprise with the oil well pole of 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 the oil pipe variable buckle joint length that 89mm change external diameter is 73mm is 0.5m, and the degree of depth bottom of variable buckle joint is 950.5m; External diameter is that the plain end oil well pipe length of 73mm is 1039.5m, and the plain end oil well pipe that external diameter the is 73mm bottom degree of depth is 1990m; Oil pump sleeve length is 7.76m, and the degree of depth bottom of oil pump sleeve is 1997.76m; External diameter is that the screen casing length of 73mm is 19.27m, and the screen casing that external diameter the is 73mm bottom degree of depth is 2017.03m; External diameter is that the starting taper length of 73mm is 20.41m, and the lower end degree of depth of the starting taper that external diameter is 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 the degree of depth bottom of the coaxial-type double hollow oil pumping rod that external diameter is 42mm is 858.76m; External diameter is that the sucker rod variable buckle joint length that 42mm change external diameter is 25mm is 0.5m, and the degree of depth bottom of sucker rod variable buckle joint is 859.26m; External diameter is that the D grade pumping rod length of 25mm is 40m, and the D grade pumping rod that external diameter the is 25mm bottom degree of depth is 899.26m; External diameter is that the HY grade pumping rod length of 22mm is 1089m, the HY grade pumping rod that external diameter is 22mm degree of depth 1988.26m bottom; External diameter is that the HY grade pumping rod length of 19mm is 8m, and the degree of depth bottom of the HY grade pumping rod that external diameter is 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 pump sleeve of oil well pipe.There are interior hollow passageway and external hollow channel connection duct in the lower end of coaxial-type double hollow oil pumping rod.Heat transfer medium demineralized water can flow into external hollow passage from interior hollow passageway.
External diameter is the long 100m of coaxial-type double hollow oil pumping rod that the depth of setting of the heavy wall tubing of 89mm is 42mm than corresponding external diameter.
Step 4, determine after setting depth of coaxial double hollow sucker rods, check oil pumping machine polished rod load.
P max=P empty bar+ P bar+ P liquid+ P f
Through check hollow stem depth of setting 800～1000m, lower pump degree of depth 1997.76m, oil pumping machine polished rod load is at 8.93t, and 14 type oil pumping functions meet production requirement.
After Jin401Jing rises and takes out, realize oil well normal production continuously in 24 hours; Oil well is not warm to be washed, not dosing, and when oil well is effective, rate on average improves 14.1 percentage points, has alleviated employee's labour intensity.

Claims (1)

1. a method for definite setting depth of coaxial double hollow sucker rods, 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 thermal cyclic carrier demineralized water in a, every km coaxial-type double hollow oil pumping rod, adopts: 600kg/ km;
Heat transfer medium demineralized water flow rate Kv in b, coaxial-type double hollow oil pumping rod, the circulation pump discharge capacity account of installing according to well head; 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 2; Q is circulation pump delivery, unit: m 3/ h; D is cross sectional area;
C, setting depth of coaxial double hollow sucker rods D, unit: m;
D, well mouth of oil well back pressure P, unit: MPa; Well mouth of oil well back pressure P is defined as 1.0-1.5MPa;
E, oil pipe cross sectional area A c, unit: mm 2; Refer to 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 2; Get 1384.74mm 2;
The formation temperature X of g, coaxial-type double hollow oil pumping rod lower end, unit: DEG C;
H, coaxial-type double hollow oil pumping rod thermal cyclic carrier demineralized water inlet temperature t, unit: DEG C;
I, well head oil outlet temperature C, unit: DEG C;
Step 2, the Mathematical Modeling of the parameter of collection being brought into oil well; Obtain well head oil outlet temperature C(x, t) relation function; Calculate by iterative method, a corresponding wellhead temperature of the degree of depth, wellhead temperature needs again to meet wellhead back pressure and oil outlet temperature simultaneously;
( x , t ) = M 2 A c ( πDt ) 1 / 2 ( x + k v t ) 2 4 Dt K e t K V ′ K V ′ + Σ K i · P K H [ 1 + exp ( - K e t ) ]
Wherein:
C is well head oil outlet temperature, unit: DEG C;
K e = K V ′ + Σ K i 1 + K p S
M is the quality of heat transfer medium demineralized water in coaxial-type double hollow oil pumping rod, unit: kg/ km;
K' V=K v/D；
Kv is the flow rate of heat transfer medium demineralized water in coaxial-type double hollow oil pumping rod;
D is setting depth of coaxial double hollow sucker rods, unit: m;
Σ K ifor first order kinetics conversion rate, get 0.55～0.60;
P is well mouth of oil well back pressure, unit: MPa;
K hfor Henry's constant; Here refer to O 2henry's constant 4.40 × 10 6;
Kp is distribution factor;
A cfor oil pipe cross sectional area, unit: mm 2;
S is coaxial-type double hollow oil pumping rod cross sectional area, unit: mm 2;
X is the formation temperature of coaxial-type double hollow oil pumping rod lower end, unit: DEG C;
T, coaxial-type double hollow oil pumping rod thermal cyclic carrier demineralized water inlet temperature, unit: DEG C;
Step 3, the depth of setting D calculating according to step 2 and well head oil outlet temperature C and well fluid level, be lowered to oil well pipe and the oil well pole with coaxial-type double hollow oil pumping rod, and it comprises:
Oil well pipe is that heavy wall tubing, the external diameter of 89mm is that 89mm becomes the screen casing that oil pipe variable buckle joint that external diameter is 73mm, plain end oil well pipe, oil pump sleeve, external diameter that external diameter is 73mm are 73mm, the starting taper that external diameter is 73mm 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 the sucker rod variable buckle joint that external diameter is 25mm, the D grade pumping rod that external diameter is 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 pump sleeve of oil well pipe; There are interior hollow passageway and external hollow channel connection duct in the lower end of coaxial-type double hollow oil pumping rod; Heat transfer medium demineralized water can flow into external hollow passage from interior hollow passageway;
External diameter is the long 100m of coaxial-type double hollow oil pumping rod that the depth of setting of the heavy wall tubing of 89mm is 42mm than corresponding external diameter;
Step 4, determine after setting depth of coaxial double hollow sucker rods, check oil pumping machine polished rod load; Whether inspection institute satisfies the demand with ground pumping unit power and lifting force;
P max=P empty bar+ P bar+ P liquid+ P f
In formula: Pmax is MAXIMUM POLISHED ROD LOAD, t; P empty barfor the weight of coaxial-type double hollow oil pumping rod in liquid, t; P barfor the weight of common bar in liquid, t; P liquidfor acting on the fluid column load on oil pump plunger piston, t.
CN201110343401.3A 2011-11-03 2011-11-03 Method for determining setting depth of coaxial double hollow sucker rods Active CN102425403B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110343401.3A CN102425403B (en) 2011-11-03 2011-11-03 Method for determining setting depth of coaxial double hollow sucker rods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110343401.3A CN102425403B (en) 2011-11-03 2011-11-03 Method for determining setting depth of coaxial double hollow sucker rods

Publications (2)

Publication Number Publication Date
CN102425403A CN102425403A (en) 2012-04-25
CN102425403B true 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 setting depth of coaxial double hollow sucker rods

Country Status (1)

Country Link
CN (1) CN102425403B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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
CN104100504B (en) * 2013-04-03 2016-07-13 中国石油天然气股份有限公司 A kind of heavy oil cold flow production screw pump dead space defining method of coaxial double hollow oil pumping rod
CN104653455B (en) * 2013-11-19 2016-09-07 中国石油天然气股份有限公司 A kind of screw pump stator and the method for adjustment in rotor axial gap
CN105443052B (en) * 2014-08-27 2017-10-17 中国石油天然气股份有限公司 A kind of determination method of oil well cleanup hollow rod depth of setting
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
CN107191139B (en) * 2017-07-10 2018-12-25 中国石油天然气股份有限公司 Determine the determination method and device of insulation eccentric wear-resistant oil pipe depth of setting

Citations (6)

* Cited by examiner, † Cited by third party
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 Deloading tool for pumping oil down-hole
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 lined with oil tube
CN201738858U (en) * 2010-07-22 2011-02-09 中国石油天然气股份有限公司 Sucker rod socket
CN201915852U (en) * 2010-12-23 2011-08-03 中国石油天然气股份有限公司 Oil pumping string for high wax content oil well
CN201934068U (en) * 2010-12-28 2011-08-17 中国石油天然气股份有限公司 Anti-eccentric wear roof bolt of oil pump 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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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 Deloading tool for pumping oil down-hole
CN201738858U (en) * 2010-07-22 2011-02-09 中国石油天然气股份有限公司 Sucker rod socket
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 lined with oil tube
CN201915852U (en) * 2010-12-23 2011-08-03 中国石油天然气股份有限公司 Oil pumping string for high wax content oil well
CN201934068U (en) * 2010-12-28 2011-08-17 中国石油天然气股份有限公司 Anti-eccentric wear roof bolt of oil pump 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

Also Published As

Publication number Publication date
CN102425403A (en) 2012-04-25

Similar Documents

Publication Publication Date Title
CN102425403B (en) Method for determining setting depth of coaxial double hollow sucker rods
CN103615225B (en) The temperature difference such as mid-deep strata oil reservoir dual horizontal well force steam circulation pre-heating mean
CN105043933B (en) A kind of high parameter fracturing fluid property test evaluation device
CN105606509A (en) Measuring method of high-temperature oil-water relative permeability of heavy oil reservoir
CN103362476A (en) Casing type downhole heat exchanger heating system capable of preventing wall of producing well from paraffin precipitation
CN201843600U (en) SAGD (Steam Assisted Gravity Drainage) mechanical lifting circulating preheating equipment
CN105980655A (en) A method for preventing wax deposition in oil wells with packers
CN105443052B (en) A kind of determination method of oil well cleanup hollow rod depth of setting
CN210033395U (en) Single horizontal well gravity oil drainage exploitation device using underground steam generation
CN202560168U (en) Hollow rod well flushing device for oil well
CN201280924Y (en) Steam cycle thick oil heating production pipe column
CN203586593U (en) Geothermal energy resource device
CN104481510B (en) A kind of method for determining heating cable for hollow oil-pumping rod depth of setting
CN110345058B (en) Oil well pump leakage detection device and method for simulating shaft conditions
CN201218093Y (en) Thick oil borehole viscosity-reduction oil-extraction heating apparatus
CN207686693U (en) A kind of flow string and device for producing thickened oil
CN104019919A (en) Device and method for measuring temperature inside core in displacement testing process
CN101298834A (en) Ultralong pumping rod hot pipe assembly with high heat transfer characteristic
CN202810812U (en) An oil extraction pipe column lifting thickened oil with steam power
CN202360063U (en) Automatic degassing and recovering device for oil well casing
CN204532295U (en) One takes over extracting device of oil of calming the anger
CN201165865Y (en) Oil well thermal cycle oil extraction apparatus
CN202560167U (en) An oil recovery low-frequency pulse electromagnetic paraffin control device
CN201190559Y (en) Ultralong sucker rod heat pipe assembly with high heat transfer characteristic
RU132503U1 (en) Borehole PUMP PUMP UNIT FOR PRODUCING HEAVY HIGH-VISCOUS OILS

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