CN1598529A - Stress sheath demage predicting method - Google Patents
Stress sheath demage predicting method Download PDFInfo
- Publication number
- CN1598529A CN1598529A CN 200410043803 CN200410043803A CN1598529A CN 1598529 A CN1598529 A CN 1598529A CN 200410043803 CN200410043803 CN 200410043803 CN 200410043803 A CN200410043803 A CN 200410043803A CN 1598529 A CN1598529 A CN 1598529A
- Authority
- CN
- China
- Prior art keywords
- stress
- sleeve pipe
- sigma
- theta
- formula
- 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 description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 19
- 239000004033 plastic Substances 0.000 claims abstract description 19
- 238000013277 forecasting method Methods 0.000 claims abstract description 3
- 230000007423 decrease Effects 0.000 claims description 30
- 238000012544 monitoring process Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 8
- 238000006467 substitution reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000000246 remedial effect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a forecasting method for stress damage. Its character lies in: at first, the radius strain of and ground stress are supervised; secondly, takes no account of affection of sleeve pipe axis stress, the sleeve pipe is considered as ring stress problem in condition of plane, deduces out the radius strain formula generated by the ring plastic deformation and the sleeve pipe plastics intensity formula, works out the stress carrier and correspondent limit intensity according to the two formulas. Finally, through the comparison of sleeve stress carrier and sleeve limit intensity, it judges the probability of damage.
Description
Technical field:
The present invention relates to the Forecasting Methodology of oil field oil, well cover damage, belong to the stress cover and decrease Forecasting Methodology.
Background technology:
Cover decrease be meant influence the field produces pipe production, improper damage or distortion, the prediction that oil field oil, well cover decrease, at home and abroad each elephant does not find that all relevant technology is reported and application; The monitoring method of casing stress load change, be to utilize existing cased well cable diameter gauge device, be acoustic caliper device, magnetic method hole diameter instrument and mechanical caliper device etc., come the monitoring sleeve radial strain to change, if the footpath strain along the circumferential direction is uniform, compare with original sleeve pipe, hole diameter enlarges can judge that the external applied load type is interior pressure, and hole diameter dwindles can judge that the external applied load type is a uniform external; If the footpath strain along the circumferential direction is heterogeneous, can judge that casing load is non-homogeneous external applied load; And the monitoring that reservoir stress changes, can utilize the dipole acoustic log instrument of oil companies such as Si Lunbeixie or Atlas to monitor the variation of terrestrial stress, this instrument only carried out application aspect hole stability control and the pressure break prediction during drilling well, at the report that does not also have success aspect the prediction of cover damage.
The anti-evenly formula of outer crowded intensity of four calculating sleeve pipes is arranged in 1984 editions, 1994 editions 5C3 formula of american petroleum IEEE (API) standard, and these four formula calculate with different formulas by the radius-thickness ratio different mining.The internal pressure strength formula is the formula of thin walled tube wall thickness by 0.875 correction in the API standard, and the elastoplasticity strength formula of sleeve pipe is not reported.
Summary of the invention:
Can only monitoring sleeve strain and reservoir stress in order to overcome existing logging instrumentation, and can not decrease the problem of predicting to cover, the invention provides a kind of stress cover and decrease Forecasting Methodology, the measurable cover of this method decreases the possibility that takes place, before cover decreases generation, sleeve pipe is adopted remedial measures, can slow down or avoid cover to decrease and take place, reduce the cost of repairs significantly.
The technical solution adopted for the present invention to solve the technical problems is:
1, last-period forecast method realizes by following step:
A, utilize the radial strain of cased well cable diameter gauge device monitoring sleeve;
B, casing stress load inversion method: do not considering quill under the situation of stress influence, sleeve pipe is regarded as the stressed problem of annulus under the planar condition, under polar coordinates (r, θ), casing stress satisfies following equation:
In the formula: σ
r-radial stress, σ
θ-tangential stress, τ
R θ, τ
θ r-shear stress; Stress boundary condition:
In the formula: P
i-sleeve pipe initial internal pressure, P
oThe initial external pressure of-sleeve pipe, the non-homogeneous external applied load of S-.The radial strain of trying to achieve the generation of annulus elastic-plastic deformation by boundary condition is:
In the formula:
A=(S
o-S
i+S/2)A′ B=S
iB′-(S
o+S/2)C′
δ
2=δB′+P
iB′-P
oC′
C, with the σ in the equation (1)
r, σ
θSubstitution Von Mises yield condition
Utilize border, elasto-plastic range (elasto-plastic region) r=r
pPlace's stress is obtained elastoplasticity intensity continuously.Get τ in the equation (1) in the plastic zone
R θ=0, sleeve pipe
Elastoplasticity intensity is:
In the formula:
S
2=σ
θ+σ
r
Q
4=4δ
2 Q
5=σ
θ-μS
2
Q
6=Q
2-μQ
2 Q
7=μS
2-σ
r
Q
8=Q
1-μQ
4
δ
1=-δA′+(P
o-P
i)A′ δ
2=δB′+P
iB′-P
oC′
Symbol description in above-mentioned formula (3), (4):
u
rThe radial displacement of-internal surface of sleeve pipe, P
p-casing stress load, P
p'-sleeve pipe elastoplasticity intensity, μ-Poisson ratio, r
1-sleeve pipe inside radius, r
2-sleeve pipe external radius, r
p-elastoplasticity intersection radius, r-measurement point radius, E-Young modulus, P
i-sleeve pipe initial internal pressure, P
oThe initial external pressure of-sleeve pipe, the non-homogeneous external applied load of S-, S
i-anti-inner pressuring load, S
o-anti-even external applied load, other each symbol is an intermediate variable.
D, the radial strain value that monitoring among the step a is obtained are updated in the formula (3), are finally inversed by casing stress load, i.e. P in the formula
p
E, utilize formula (4) to calculate the ultimate strength P of sleeve pipe under the respective loads effect
p';
F, the P that above-mentioned steps d, e are calculated
p, P
p' compare, judge that cover decreases the possibility that takes place;
2, long-range forecasting method realizes by following step:
A, utilize dipole acoustic log instrument monitoring terrestrial stress;
B, utilize the formula (4) in the last-period forecast method to calculate the ultimate strength P of sleeve pipe under the respective loads effect
p';
C, above-mentioned steps a monitoring terrestrial stress that obtains and the ultimate strength that step b calculates are compared, judge that cover decreases the possibility of generation.
The invention has the beneficial effects as follows:, can calculate casing stress load and the ultimate strength under the respective loads effect according to this formula because the present invention has derived radial strain formula and sleeve pipe elastoplasticity strength formula that the annulus elastic-plastic deformation produces according to elastic plastic theory.By the comparison of stress loading and ultimate strength, measurable cover decreases the possibility that takes place; Before cover decreases generation, sleeve pipe is adopted remedial measures, can slow down or avoid cover to decrease and take place, reduce the cost of repairs significantly.
Description of drawings:
Fig. 1 is the evenly outer stress model figure of carrying of sleeve pipe of the present invention;
Fig. 2 is the non-homogeneous outer stress model figure of carrying of sleeve pipe of the present invention;
Fig. 3 is the even and non-homogeneous outer acting in conjunction stress model figure of carrying of sleeve pipe of the present invention;
Fig. 4 is that the present invention is internal pressure strength and the corresponding radial deformation figure that example is calculated with 139.7 * 7.72mm sleeve pipe;
Fig. 5 is that the present invention is anti-uniform external intensity and the corresponding radial deformation figure that example is calculated with 139.7 * 7.72mm sleeve pipe;
Fig. 6 is that the present invention is anti-non-homogeneous external pressure strength and the corresponding radial deformation figure that example is calculated with 139.7 * 7.72mm sleeve pipe;
Embodiment:
The present invention is further described below in conjunction with accompanying drawing:
Fig. 1, Fig. 2, Fig. 3 are casing stress illustratons of model of the present invention, and sleeve pipe is regarded as the stressed problem of annulus under the planar condition, and under polar coordinates (r, θ), casing stress satisfies following equation:
In the formula: σ
r-radial stress, σ
θ-tangential stress, τ
R θ, τ
θ r-shear stress; Stress boundary condition:
In the formula: P
i-sleeve pipe initial internal pressure, P
oThe initial external pressure of-sleeve pipe, the non-homogeneous external applied load of S-.The radial strain of trying to achieve the generation of annulus elastic-plastic deformation by boundary condition is:
In the formula:
A=(S
o-S
i+S/2)A′ B=S
iB′-(S
o+S/2)C′
δ
2=δB′+P
iB′-P
oC′
With σ
r, σ
θSubstitution Von Mises yield condition
Utilize border, elasto-plastic range (elasto-plastic region) r=r
pPlace's stress is obtained elastoplasticity intensity continuously.Get τ in the equation (1) in the plastic zone
R θ=0, its result causes non-uniform load intensity slightly bigger than normal.Sleeve pipe elastoplasticity intensity is:
In the formula:
S
2=σ
θ+σ
r
Q
4=4δ
2 Q
5=σ
θ-μS
2
Q
6=Q
2-μQ
2 Q
7=μS
2-σ
r
Q
8=Q
1-μQ
4
δ
1=-δ A '+(P
o-P
i) A ' δ
2=δ B '+P
iB '-P
oSymbol description in the above-mentioned formula of C ' (3), (4):
u
rThe radial displacement of-internal surface of sleeve pipe, P
pCasing stress load, P
p'-sleeve pipe elastoplasticity intensity, μ-Poisson ratio, r
1-sleeve pipe inside radius, r
2-sleeve pipe external radius, r
p-elastoplasticity intersection radius, r-measurement point radius, E-Young modulus, P
i-sleeve pipe initial internal pressure, P
oThe initial external pressure of-sleeve pipe, the non-homogeneous external applied load of S-, S
i-anti-inner pressuring load, S
o-anti-even external applied load, other each symbol is an intermediate variable.
In actual use, available two kinds of methods are decreased cover and are predicted.A kind of method is long-range forecasting, utilizes the dipole acoustic log instrument to monitor terrestrial stress; Then, middle sleeve elastoplasticity strength formula (4) calculates the ultimate strength of sleeve pipe under the respective loads effect according to the present invention.Terrestrial stress and ultimate strength are compared, judge that cover decreases the possibility that takes place; Another kind method is last-period forecast, sharp cased well cable diameter gauge device, be acoustic caliper device, magnetic method hole diameter instrument and mechanical caliper device etc., come the monitoring sleeve radial strain, if the footpath strain along the circumferential direction is uniform, compare with original sleeve pipe, hole diameter enlarges can judge that the external applied load type is interior pressure, and hole diameter dwindles can judge that the external applied load type is a uniform external; If the footpath strain along the circumferential direction is heterogeneous, can judge that casing load is non-homogeneous external applied load, utilize casing stress strain stress relation formula (3) to calculate casing stress load then.At last, utilize sleeve pipe elastoplasticity strength formula (4) to calculate the ultimate strength of sleeve pipe under the respective loads effect; Casing stress load and ultimate strength are compared, judge that cover decreases the possibility that takes place.
Above-mentioned two kinds of methods are decreased the prediction of possibility occurrence to cover, if casing stress load (or reservoir stress) very near the sleeve pipe ultimate strength, then to decrease the possibility that takes place just big for cover; If casing stress load (or reservoir stress) increase is than very fast, then the possibility of cover damage generation is also very big, need pay close attention to load change; If casing stress load (or reservoir stress) is more stable, and compare lessly with the ultimate strength under the respective loads, then the possibility that decrease to take place of cover is also less; Other situation can the rest may be inferred.Two kinds of methods can be used separately, also can use simultaneously, and using simultaneously can be complementary, obtains best prediction effect; Can before cover decreases generation, adopt remedial measures, slow down or avoid cover to decrease and take place, reduce the cost of repairs significantly sleeve pipe.
Embodiment:
Embodiment 1: burst resistance:
Embodiment 2: anti-uniform external intensity:
Embodiment 3: anti-non-homogeneous external pressure strength:
Fig. 6 series 1 is that the sleeve pipe inside and outside differential pressure is 0 o'clock anti-non-homogeneous external pressure stress strain stress relation of sleeve pipe, sleeve pipe elastoplasticity intensity is 5.6MPa, less than evenly the time 10%, when external applied load (non-homogeneous external pressure) begins to enter elastic-plastic phase when reaching this numerical value, its Changing Pattern no longer is a linear relationship, the anti-intensity of carrying descends rapidly, and its strain variation scope is from 0.3 millimeter to 15 millimeters variation, with the radial strain u of cased well cable diameter gauge device monitoring sleeve
r, can be finally inversed by the casing stress load p by formula of the present invention (3)
pIt is maximum that such cover decreases harm.Series the 2,3, the 4th, interior pressure are 10,20, the situation during 30MPa, increase the anti-non-homogeneous external pressure ability of sleeve pipe with interior pressure and have reduced.Series the 5,6, the 7th, external pressure are 10,20, the situation during 30MPa, because the external pressure increase has reduced sleeve pipe and carried non-uniform degree outward, the anti-non-homogeneous external pressure ability of sleeve pipe increases.So say exactly, it not is the mistake of water filling that cover decrease to increase, but changes when the structure on stratum, and for example: the slippage on stratum, faulting recurrence and mud stone creep etc. cause the non-homogeneous loading of sleeve pipe, occur cover easily and decrease; Oilfield injection water should be kept a close eye on and inject the water whereabouts, strengthens two monitorings such as profile logging, well bore and stratal configuration variation, and strictness avoids non-homogeneous loading to occur.Why sometimes this has just explained that water injection pressure is not too high and but has been easy to occur cover and decreases, and the damage problem do not occur overlapping and water injection pressure is very big sometimes.
Claims (2)
1, a kind of stress cover decreases Forecasting Methodology, and it is characterized in that: the last-period forecast method realizes by following step:
A, utilize the radial strain ur of cased well cable diameter gauge device monitoring sleeve;
B, casing stress load inversion method: do not considering quill under the situation of stress influence, sleeve pipe is regarded as the stressed problem of annulus under the planar condition, under polar coordinates (r, θ), casing stress satisfies following equation:
Stress boundary condition:
The radial strain of trying to achieve the generation of annulus elastic-plastic deformation by boundary condition is:
C, with the σ in the equation (1)
r, σ
θSubstitution Von Mises yield condition
Utilize border, elasto-plastic range (elasto-plastic region) r=r
pPlace's stress is obtained elastoplasticity intensity continuously.Get τ in the equation (1) in the plastic zone
R θ=0, sleeve pipe elastoplasticity intensity is:
D, the radial strain value that monitoring among the step a is obtained are updated in the formula (3), are finally inversed by casing stress load, i.e. P in the formula
p
E, utilize formula (4) to calculate the ultimate strength P ' of sleeve pipe under the respective loads effect
p
F, the P that above-mentioned steps d, e are calculated
p, P '
pCompare, judge that cover decreases the possibility that takes place;
2, a kind of stress cover decreases Forecasting Methodology, and it is characterized in that: the long-range forecasting method realizes by following step:
A, utilize dipole acoustic log instrument monitoring terrestrial stress;
B, utilize the formula (4) in the claim 1 to calculate the ultimate strength P ' of sleeve pipe under the respective loads effect
p
The ultimate strength P ' that c, the terrestrial stress that above-mentioned steps a monitoring is obtained and step b calculate
pCompare, judge that cover decreases the possibility that takes place.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200410043803 CN1291225C (en) | 2004-08-13 | 2004-08-13 | Stress sheath demage predicting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200410043803 CN1291225C (en) | 2004-08-13 | 2004-08-13 | Stress sheath demage predicting method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1598529A true CN1598529A (en) | 2005-03-23 |
CN1291225C CN1291225C (en) | 2006-12-20 |
Family
ID=34665459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 200410043803 Active CN1291225C (en) | 2004-08-13 | 2004-08-13 | Stress sheath demage predicting method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1291225C (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103411711A (en) * | 2013-07-11 | 2013-11-27 | 南京航空航天大学 | Measuring device of tubular part inner wall processing stress and measuring method thereof |
CN103678927A (en) * | 2013-12-20 | 2014-03-26 | 中国石油天然气集团公司 | Thermal production well casing tubular column total strain calculating method |
CN104091055A (en) * | 2014-06-27 | 2014-10-08 | 北京航空航天大学 | Technology calculating two-dimensional ideal elastic-plastic solid in Euler coordinate system |
CN104181060A (en) * | 2014-09-18 | 2014-12-03 | 西南石油大学 | Method and device for testing mechanical parameters of thin-walled pipe fitting |
CN104198294A (en) * | 2014-09-19 | 2014-12-10 | 南京工业大学 | Non-blasting type test method for pressure pipeline element |
CN105765164A (en) * | 2013-11-27 | 2016-07-13 | 兰德马克绘图国际公司 | Determining stresses in a pipe under non-uniform exterior loads |
CN106991235A (en) * | 2017-04-01 | 2017-07-28 | 中国石油天然气集团公司 | Cementing concrete ring integrity analysis Forecasting Methodology and device |
CN107782599A (en) * | 2017-09-08 | 2018-03-09 | 吉林大学 | A kind of material breakdown experimental method |
CN108279173A (en) * | 2018-01-02 | 2018-07-13 | 中国石油天然气集团公司 | A kind of casing anti-shear performance evaluation method |
CN112127879A (en) * | 2020-09-23 | 2020-12-25 | 西南石油大学 | Method for judging casing deformation risk of natural fractured shale formation hydraulic fracturing horizontal well shaft |
US11326447B2 (en) * | 2019-07-15 | 2022-05-10 | Saudi Arabian Oil Company | Wellbore stability prediction |
-
2004
- 2004-08-13 CN CN 200410043803 patent/CN1291225C/en active Active
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103411711B (en) * | 2013-07-11 | 2016-01-20 | 南京航空航天大学 | A kind of measurement mechanism of tubular member inwall machining stress and measuring method thereof |
CN103411711A (en) * | 2013-07-11 | 2013-11-27 | 南京航空航天大学 | Measuring device of tubular part inner wall processing stress and measuring method thereof |
US9638023B2 (en) | 2013-11-27 | 2017-05-02 | Landmark Graphics Corporation | Determining stresses in a pipe under non-uniform exterior loads |
CN105765164A (en) * | 2013-11-27 | 2016-07-13 | 兰德马克绘图国际公司 | Determining stresses in a pipe under non-uniform exterior loads |
GB2534766A (en) * | 2013-11-27 | 2016-08-03 | Landmark Graphics Corp | Determining stresses in a pipe under non-uniform exterior loads |
GB2534766B (en) * | 2013-11-27 | 2017-04-12 | Landmark Graphics Corp | Determining stresses in a pipe under non-uniform exterior loads |
CN103678927B (en) * | 2013-12-20 | 2016-06-08 | 中国石油天然气集团公司 | The method determining Casing In Thermal Recovery Wells overall strain |
CN103678927A (en) * | 2013-12-20 | 2014-03-26 | 中国石油天然气集团公司 | Thermal production well casing tubular column total strain calculating method |
CN104091055A (en) * | 2014-06-27 | 2014-10-08 | 北京航空航天大学 | Technology calculating two-dimensional ideal elastic-plastic solid in Euler coordinate system |
CN104181060A (en) * | 2014-09-18 | 2014-12-03 | 西南石油大学 | Method and device for testing mechanical parameters of thin-walled pipe fitting |
CN104198294A (en) * | 2014-09-19 | 2014-12-10 | 南京工业大学 | Non-blasting type test method for pressure pipeline element |
CN106991235A (en) * | 2017-04-01 | 2017-07-28 | 中国石油天然气集团公司 | Cementing concrete ring integrity analysis Forecasting Methodology and device |
CN106991235B (en) * | 2017-04-01 | 2020-03-10 | 中国石油天然气集团公司 | Method and device for analyzing and predicting integrity of well cementation cement sheath |
CN107782599A (en) * | 2017-09-08 | 2018-03-09 | 吉林大学 | A kind of material breakdown experimental method |
CN107782599B (en) * | 2017-09-08 | 2020-12-29 | 吉林大学 | Material breakdown experiment method |
CN108279173A (en) * | 2018-01-02 | 2018-07-13 | 中国石油天然气集团公司 | A kind of casing anti-shear performance evaluation method |
CN108279173B (en) * | 2018-01-02 | 2020-08-07 | 中国石油天然气集团公司 | Method for evaluating anti-shearing performance of casing |
US11326447B2 (en) * | 2019-07-15 | 2022-05-10 | Saudi Arabian Oil Company | Wellbore stability prediction |
CN112127879A (en) * | 2020-09-23 | 2020-12-25 | 西南石油大学 | Method for judging casing deformation risk of natural fractured shale formation hydraulic fracturing horizontal well shaft |
CN112127879B (en) * | 2020-09-23 | 2021-04-20 | 西南石油大学 | Method for judging casing deformation risk of natural fractured shale formation hydraulic fracturing horizontal well shaft |
Also Published As
Publication number | Publication date |
---|---|
CN1291225C (en) | 2006-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1291225C (en) | Stress sheath demage predicting method | |
CN103245523B (en) | Combination vibration absorber of helicoid hydraulic motor complete machine test stand and preparation method thereof | |
CN101392647B (en) | Borehole wall stability prediction method suitable for gas drilling | |
CN108414351B (en) | Method for evaluating nonuniform external extrusion capacity of casing | |
CN103510948B (en) | A kind of experimental technique being applicable to the prediction of brittle rock Well-bore Stability During Gas Drilling | |
CN106639971A (en) | High pressure-bearing blocking method for perforation shot hole | |
CN103411870A (en) | Experimental device for simulating dynamic destruction of stratum rocks | |
CN212671582U (en) | Combined casing for fracturing oil and gas reservoir | |
CN103760095B (en) | Sliding desk type casing tube abrasion machine | |
CN101762423B (en) | Test bench for prestressed anchor cable anchorage | |
CN1289890A (en) | Calibration of hydraulic pressure with isodensity | |
CN106761443B (en) | The assembled casing of casing deformation when preventing shale gas well fracturing | |
CN111722300A (en) | Layered instantaneous water pumping type micro-water test method in drill hole | |
CN208432495U (en) | Shock loading loading device and the pilot system for simulating shock loading | |
CN204200075U (en) | Vibration damping supercharging drill motor | |
CN109657253B (en) | Design method and device of casing wellhead annular space pressured prevention tool | |
CA2818896C (en) | Methods and apparatus for enhancing elastomeric stator insert material properties with radiation | |
Bradshaw et al. | Load transfer curves from a large-diameter pipe pile in silty soil | |
CN203729975U (en) | Device for measuring lateral force and axial force of drill bit in simulation drilling | |
CN107366513A (en) | A kind of pipe string of oil-water well axial vibration absorber | |
CN102392647B (en) | Intermediate support device for ultra-deep drilling borehole | |
Zhang et al. | Numerical analysis of lateral behaviour of large-diameter monopile in saturated clay | |
CN1410650A (en) | Single-stage double-seal well cementation method | |
CN109033698A (en) | A method of it is calculated for laminar formation horizontal well fracture pressure | |
CN113494247B (en) | Method and device for selecting sleeve |
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 | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20211223 Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District Yuanwang post office box 6-6 Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: PetroChina Company Limited Address before: 163458 Heilongjiang Province, Daqing City Ranghulu District Yuanwang post office box 6-6 Patentee before: Daqing Oilfield Co.,Ltd. |