CN205103100U - HTHP well cementation cement ring integrality simulation evaluation test appearance - Google Patents
HTHP well cementation cement ring integrality simulation evaluation test appearance Download PDFInfo
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- CN205103100U CN205103100U CN201520844546.5U CN201520844546U CN205103100U CN 205103100 U CN205103100 U CN 205103100U CN 201520844546 U CN201520844546 U CN 201520844546U CN 205103100 U CN205103100 U CN 205103100U
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Abstract
The utility model provides a HTHP well cementation cement ring integrality simulation evaluation test appearance, includes the cauldron body and kettle cover, kettle cover top center department leaves the high pressure line and connects the box through threaded connection pressure head, pressure head top for connecting the high pressure line and applying the displacement pressure, the bottom be the toper tip, and the conical surface is polished the smoothness and is realized with depression bar top tapered groove that the mirror surface seals, the depression bar is installed in the centre bore department of kettle cover, slides from top to bottom at the centre bore, sealing washer that the depression bar passes through installation on the pole realize and the kettle cover between sliding seal, the processing of depression bar lower extreme has the recess of laying the steel pipe sample, places copper seal gasket between steel pipe sample and depression bar, steel pipe sample lower extreme is placed in cauldron internal bottom recess, places copper seal gasket in the recess equally, the utility model discloses the actual high temperature and high pressure environment in the pit that the cement solidification body was located can simulate to can survey the self -reparing capability that firming body sample microcrack reached little clearance simultaneously under this condition, and experimental slurry quantity is little, experiment operating time weak point.
Description
Technical field
The utility model belongs to petroleum drilling technology field, particularly a kind of HTHP (hightemperaturehighpressure High Temperature High Pressure) cementing concrete ring integrality Simulation evaluation test instrument.
Background technology
In cementing operation, cementing slurry is injected into the annular space between sleeve pipe and stratum, and grout will stand subsurface environment and finally solidify the cement mantle being formed and have certain cementing power and hardness.In well, cement mantle has the function of packing stratum and support, protective casing effectively.In order to stable yields, volume increase, water filling is carried out all in succession in each oil field, pressure break, acidifying, perforations addings etc. improve the down-hole engineer operations such as drawdown pressure, different operation process must make borehole condition change, in sleeve pipe, pressure changes, stratum pressure from surrounding rock change and wellbore temperatures change the effects such as the temperature stress caused, cement mantle stress is changed, cement mantle may be caused to crack, the packing effect of cement mantle was lost efficacy, cause the corrosion failure of channelling between underground oil and gas water layer and sleeve pipe, Oil/gas Well is caused to scrap (Wang Hanhua time serious, Gao Lili. well-cementing cement Status of Mechanical Properties is simply analysed. western mineral exploration engineering, 2010, 4:70-74).
Along with slim hole, Multilateral Wells, sidetracked hole and oil sheet well, the increasing of thermal recovery well quantity, also more and more higher to the requirement of cementing quality.For small―gap suture annular space and oil sheet well cementation, because cement mantle is very thin, the integrality of Behavior of Hardened Cement Paste must be guaranteed, otherwise the oil well life-span will be had a strong impact on; The shock of drill bit, drilling rod and vibrations when in window sidetracking well, long horizontal traverse well, extended reach well and Multilateral Wells, the cement mantle of inclination section often suffers to continue to creep into, and the destruction that in thermal recovery well, thermal shock stress produces cement mantle, all require the mechanical property studying and improve cementing concrete ring, reduce the fragility of cement mantle, the toughness of refinforced cement ring (is encouraged and is striven, Su Xianji. the experimental study [J] of Behavior of Hardened Cement Paste dynamic fracture toughnes. mechanics and practice, 1999,21 (1): 41-44).
Therefore, research well-cementing cement mechanical property, the long term life of integrality to production and oil-water well improving cement mantle body has great importance.
Study general about hardened oilwell cement mechanical property aspect all concentrates on the intensity aspect of Behavior of Hardened Cement Paste, general all using the uniaxial compressive strength of Behavior of Hardened Cement Paste as major project performance index and to its implementation focus determination and analysis (Zhang Jingfu, Lin Bo, the people such as king Xun. the relation of simple stress Water Under mudstone intensity and elastic modulus. science and technology and engineering, 2010,10 (21): 5249-5253).
Traditional cements stone Evaluation Method of Mechanical Property has used for reference the mechanics evaluation method of inorganic non-metallic in the mechanics of materials such as concrete, construction cement substantially, wherein conventional universal testing machine directly can record tension, anti-folding, the mechanical property such as anti-shearing, but can not simulate various subsurface environment and operating mode to the impact of Behavior of Hardened Cement Paste integrality.Therefore, the research of current Mechanical Behavior of Hardened Cement Paste is aimed at the performance evaluation that special cement slurry system forms Behavior of Hardened Cement Paste more, and lack the regularity cognition (Wang Hanhua that Mechanical Behavior of Hardened Cement Paste is affected by subsurface environment, Gao Lili. well-cementing cement Status of Mechanical Properties is simply analysed. western mineral exploration engineering, 2010,4:70-74).
In recent years, the appraisal and study of Chinese scholars to Behavior of Hardened Cement Paste integrality is more and more paid attention to, and tests the technical way as investigating Behavior of Hardened Cement Paste integrality using at lab simulation subsurface environment to the influence research of Mechanical Behavior of Hardened Cement Paste.Current research method all strives the down-hole stressing conditions of simulating cementing concrete ring as much as possible, but Problems existing is that test unit complexity is huge, and experimentation cost is high.More crucially: as integrality and the reliability of cementing concrete ring, the mechanical performance index of its key should be the unfailing performance of the Inter-zonal packing of cementing concrete ring in the performance history that Oil/gas Well is long-term, namely alters intensity to the anti-of downhole fluid such as oil gas water.These methods existing can only measure the mechanical property of cementing concrete ring under specified conditions, the change of quantitative test gage well downforce can not resist the change of altering intensity to cementing concrete ring, be difficult to the essence of problem of perception.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of HTHP cementing concrete ring integrality Simulation evaluation test instrument, can the environmental baseline of down-hole residing for simulate cementing concrete ring, simulation downhole temperature is on the impact of cementing concrete ring, under measuring different downhole temperature condition, cementing concrete ring resists the situation of change of altering intensity, thus the packing reliability of accurate evaluation cementing concrete ring under different downhole temperature pressure condition, i.e. integrality; Have structure simple, with low cost, easy to operate, test paste content is little, and test figure favorable reproducibility, can carry out the feature of lot of experiments work in the short time.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of HTHP cementing concrete ring integrality Simulation evaluation test instrument, comprise kettle 5 and kettle cover 3, kettle cover 3 top center place connects pressure head 2 by screw thread 1, high pressure line joint box is left at pressure head 2 top, for connecting high pressure line and applying displacement pressure, bottom is for taper tip, and the conical surface polishes smooth and realizes minute surface with depression bar 4 top tapered groove and seal; Depression bar 4 is installed on the central hole of kettle cover 3, slide up and down at center pit, depression bar 4 realizes the slipper seal between kettle cover 3 by the O-ring seal 1 that bar is installed, depression bar 4 lower end is processed with the groove laying steel pipe sample 6, copper gasket seal 1 is placed between steel pipe sample 6 and depression bar 4, steel pipe sample 6 lower end is positioned over kettle 5 inner bottom part groove, the copper gasket seal 2 92 of same placement in groove.
Having been linked closely mounting rod 1 by screw thread in described kettle cover 3 liang of oblique sides, is connected with the screw thread 2 72 of kettle 5 for screwing kettle cover 3.
Described steel pipe sample 6 to use steel pipe to be external diameter be 25 ~ 26mm, internal diameter is 20 ~ 21mm, and length is the stainless-steel pipe 13 of 79 ~ 81mm.By different method for makings, Behavior of Hardened Cement Paste 12 is consolidated in steel duct and can be made into microfracture and microclearance sample, to simulate different cement mantle type of impairment.
Described kettle 5 is the hollow cylindrical tube of external diameter 110mm, has dark 3mm bottom inner core, the groove of diameter 26mm, and for laying copper gasket seal 2 92, cylinder inside top car has screw thread 2 72 and O-ring seal 2 82 mounting groove for installing and sealing kettle cover 3.
Described depression bar 4 is the hollow circuit cylinder bar of diameter 25mm, shaft is processed with the wide 3mm of twice, dark 2mm groove, for installing O-ring seal 1, bar bottom internal diameter 26mm, for installing at the bottom of copper gasket seal 1 seal bar and steel pipe sample 6 upper end, masthead portion is processed with conical socket, groove surface, through mirror polish process, realizes being tightly connected with the minute surface of pressure head 2.
Described kettle cover 3 top is processed with diameter 15mm, screw thread 1 eyelet of dark 20mm, for assembling pressure head 2, kettle cover 3 is also processed with confined pressure passage 11, channel roof is processed with high pressure line joint box for connecting confined pressure pipeline, both sides are processed with mounting rod box for installing mounting rod 1, middle part is for screw thread 2 72 is for connecting kettle 5, bottom is left O-ring seal 2 82 and is installed groove, match with kettle 5, for sealing the connection with kettle 5, bottom is processed with the center pit of diameter 26mm, for the up and down passage of depression bar 4, hole inwall is through polishing, be convenient to realize dynamic seal (packing) with depression bar O-ring seal 1.
Described pressure head 2 is hollow screw mandrel, shaft diameter 25mm, match with kettle cover 3 top eyelet, pressure head 2 top is left high pressure line and is installed box for connecting displacement pressure path 10 pipeline, bottom is taper tip, and the conical surface is convenient to through mirror polish process the minute surface realized with depression bar top groove and is tightly connected.
First steel pipe sample 6 is positioned over during assembling on the copper gasket seal 2 92 of kettle 5 inner bottom part groove, then bottom depression bar 4 being placed with copper gasket seal 1 is positioned over steel pipe sample upper end, and add applied pressure by annulus fluid to kettle inner chamber, kettle cover 3 is kept vertically and kettle 5 screw, depression bar 4 just stretches in kettle cover 3 center pit, continue pressure head 2 is screwed in kettle cover 3 and tightens, now pressure head pushes against depression bar 4 and realizes being tightly connected between pressure head 2 and depression bar 4, the depression bar 4 of slide downward compresses steel pipe sample 6 reaches sample and depression bar 4 and kettle 5 sealing by copper gasket seal 1 simultaneously, thus realize UNICOM and the sealing of displacement passage.By confined pressure pipeline and displacement pipeline with not being connected to kettle cover 3 and pressure head 2 top, instrument being positioned in heating jacket, under the downhole condition of different temperatures and confined pressure, measuring the anti-of steel pipe sample by control simulation and altering intensity.
Compared with prior art, the beneficial effects of the utility model are:
1. can realize the displacement passage at steel pipe sample center and the independent sealed of circumferential confined pressure passage, the clamper confined pressure that breaks traditions must be greater than the condition of displacement pressure, better can simulate the effect of bottom stress to cementing concrete ring.
2. anti-measurement of altering intensity under can realizing hot conditions, better the down-hole high-temperature and high-pressure conditions of simulation residing for cement mantle.
3. the change by controlling confined pressure and temperature can realize the surveying work of kinds of experiments data, meets the various requirement of cement mantle injury repair laboratory measurement.
The utility model HTHP cementing concrete ring integrality Simulation evaluation test instrument can simulate the actual high temperature and high pressure environment in down-hole residing for solidified cement body, and the self-reparing capability of firming body sample microfracture and microclearance can be measured under this condition simultaneously, more meet down-hole actual conditions than conventional normal temperature evaluation method.Have structure simple, with low cost, easy to operate, test paste content is little, the feature that the experiment work time is short, can high temperature and high pressure environment residing for real simulation underground cement ring, is the authentic experiments means of evaluation study cementing concrete ring integrality.
Accompanying drawing explanation
Fig. 1 is the utility model HTHP cementing concrete ring integrality Simulation evaluation test instrument sectional view.
Fig. 2 is the utility model HTHP cementing concrete ring integrality Simulation evaluation test instrument schematic diagram.
Fig. 3 is the utility model pressure head structure schematic diagram.
Fig. 4 is the utility model pressure rod structure schematic diagram.
Fig. 5 is the utility model kettle cover structural representation.
Fig. 6 is the utility model kettle structure schematic diagram.
Fig. 7 is the utility model steel pipe sample structure schematic diagram.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with drawings and Examples.
See accompanying drawing 1 ~ 2, mounting rod 1 is closely buckled in kettle cover 3 liang of oblique sides by screw thread, for screwing being threaded of kettle cover 3 and kettle 5; Pressure head 2 is arranged on kettle cover 3 top center place, be connected with kettle cover 3 by screw thread, high pressure line joint box is left at pressure head 2 top, for connecting high pressure line and applying displacement pressure, bottom is for taper tip, and the conical surface polishes smooth and realizes minute surface with depression bar 4 top tapered groove and seal; Depression bar 4 is installed on kettle cover central hole, and can slide up and down at center pit, depression bar 4 realizes the slipper seal between kettle cover 3 by the O-ring seal 1 that bar is installed, depression bar 4 lower end is processed with the groove laying steel pipe sample 6, copper gasket seal 1 is placed between steel pipe sample 6 and depression bar, steel pipe sample 6 lower end is positioned over kettle 5 inner bottom part groove, the copper gasket seal 2 92 of same placement in groove.
First steel pipe sample 6 is positioned over during assembling on the copper gasket seal 2 92 of kettle 5 inner bottom part groove, then bottom depression bar 4 being placed with copper gasket seal 1 is positioned over steel pipe sample upper end, and add applied pressure by annulus fluid to kettle inner chamber, kettle cover 3 is kept vertically and kettle 5 screw, depression bar 4 just stretches in kettle cover 3 center pit, continue pressure head 2 is screwed in kettle cover 3 and tightens, now pressure head pushes against depression bar 4 and realizes being tightly connected between pressure head 2 and depression bar 4, the depression bar 4 of slide downward compresses steel pipe sample 6 reaches sample and depression bar 4 and kettle 5 sealing by copper gasket seal 1 simultaneously, thus realize UNICOM and the sealing of displacement path 10.By confined pressure pipeline and displacement pipeline with not being connected to kettle cover 3 and pressure head 2 top, instrument being positioned in heating jacket, under the downhole condition of different temperatures and confined pressure, measuring the anti-of steel pipe sample by control simulation and altering intensity.
See accompanying drawing 3, pressure head 2 is hollow screw mandrel, and shaft diameter 25mm matches with kettle cover top eyelet, and pressure head top is left high pressure line and installed box for connecting displacement pressure pipeline.Bottom is taper tip, and the conical surface is convenient to through mirror polish process the minute surface realized with depression bar top groove and is tightly connected.
See accompanying drawing 4, depression bar 4 is 25mm hollow circuit cylinder bar, and shaft is processed with the dark 2mm groove of the wide 3mm of twice for installing O-ring seal 1, and bar bottom internal diameter 26mm can install copper gasket seal 1 for seal bar and steel pipe sample upper end.Masthead portion is processed with conical socket, and groove surface, through mirror polish process, realizes being tightly connected with the minute surface of pressure head.
See accompanying drawing 5, kettle cover 3 top is processed with the dark 20mm threaded bore of diameter 15mm for assembling pressure head, kettle cover is also processed with confined pressure passage 11, and channel roof is processed with high pressure line joint box for connecting confined pressure pipeline, and both sides are processed with mounting rod box for installing mounting rod.Middle part connects for connecting kettle for screw thread 7, and bottom is left O-ring seal 2 82 and installed groove, the connection matched with kettle for being sealed in kettle.Bottom is processed with diameter 26mm center pit, and be the up and down passage of depression bar, hole inwall, through polishing, is convenient to realize dynamic seal (packing) with depression bar O-ring seal 1.
See accompanying drawing 6, kettle 5 is the hollow cylindrical tube of external diameter 110mm, has the groove of dark 3mm diameter 26mm for laying copper gasket seal 2 92 bottom inner core, and cylinder inside top car has screw thread 2 72 and O-ring seal 2 82 mounting groove for installing and sealing kettle cover.
See accompanying drawing 7, steel pipe sample 6 to use steel pipe to be external diameter be 25 ~ 26mm, internal diameter is 20 ~ 21mm, and length is the stainless-steel pipe 13 of 79 ~ 81mm.By different method for makings, Behavior of Hardened Cement Paste 12 is consolidated in steel duct and can be made into microfracture and microclearance sample, to simulate different cement mantle type of impairment.
Principle of work of the present utility model and experiment process are:
1, steel pipe sample 6 is basic elements of character of HTHP cementing concrete ring integrality simulation testing instrument, and stainless-steel pipe 13 inside is consolidated with Behavior of Hardened Cement Paste 12, according to different experiments require make microfracture or microclearance steel pipe sample 6 for subsequent use.
2, copper gasket seal 2 92 is placed in kettle 5 bottom groove, the steel pipe sample 6 first step prepared to be positioned on gasket seal 2 92 and depression bar 4 and upper gasket seal 1 is placed on steel pipe sample upper end.Kettle space is added charging fluid tap water or oil.
3, kettle cover 3 and kettle 5 are screwed, now depression bar 4 can extend in the center pit of kettle cover 3, and relies on the O-ring seal 1 on depression bar 4 to realize the dynamic seal (packing) with kettle cover 3.
4, pressure head 2 is screwed in the threaded bore of kettle cover 3 top, until contact depression bar 4, and continue to screw and make depression bar 4 compress steel pipe sample 6, realize sample 6 and the sealing between kettle 5 and depression bar 4.
5, test instrument is put into heating jacket, then confined pressure pipeline and displacement pipeline are connected to kettle cover 3 respectively, set up displacement path 10 and confined pressure passage 11.
A is without confined pressure cold test
Namely confined pressure (P is not applied to sample
2a=0MPa) when normal temperature record anti-ly alter intensity.Direct applying hydraulic pressure P
1, determining instrument endpiece oozes the first hydraulic pressure P when dripping
maxa, be oil well cement firming body sample and alter intensity level without anti-under confined pressure normal temperature condition.
The cold test of (b) band confined pressure
What when namely applying certain confined pressure to sample, normal temperature recorded anti-ly alters intensity.First, predetermined confined pressure value P is applied
2b, then apply hydraulic pressure P, and the anti-of working sample alters intensity level P
maxb, be oil well cement firming body sample at P
2banti-under confined pressure normal temperature condition alters intensity level.
The hot test of (c) band confined pressure
Namely apply certain confined pressure to sample and record in the case of a high temperature anti-ly alter intensity.First seal confined pressure passage and displacement passage, instrument is placed in heating jacket and heats up, along with the rising of temperature, due to the expansion of hydraulic fluid in kettle, confined pressure can slowly increase, and after reaching assigned temperature, opens confined pressure passage and confined pressure is increased to appointment confined pressure P to temperature
2c, then continue test according to b method of testing, the anti-of working sample alters intensity level P
maxc, be oil well cement firming body sample at P
c2anti-under confined pressure normal temperature condition alters intensity level.
To sum up, the utility model resists the affecting laws of altering intensity to cementing concrete ring by temperature variation under simulation well, cementing concrete ring anti-situation of change of altering intensity under different well depth temperature conditions is analyzed in quantitative measurement, test data is enable truly, accurately and intactly to react integrality and the mechanical property of cementing concrete ring, as cement mantle self-healing properties under high-temperature and high-pressure conditions etc., and then propose to improve mechanism and the measure of well-cementing cement mechanical property targetedly, improve well-cementing cement in the integrality of conditions down-hole and load-bearing capacity.The research of this cementing concrete ring integrality Simulation evaluation test instrument is for the integrality of accurate evaluation cementing concrete ring, carry out the research of cementing concrete ring integrality and permanance, for cementing design provides reliable design considerations, improve cementing quality, the prolongation Oil/gas Well life-span has important construction value.
Claims (7)
1. a HTHP cementing concrete ring integrality Simulation evaluation test instrument, comprise kettle (5) and kettle cover (3), it is characterized in that, kettle cover (3) top center place connects pressure head (2) by screw thread one (71), high pressure line joint box is left at pressure head (2) top, for connecting high pressure line and applying displacement pressure, bottom is for taper tip, and the conical surface polishes smooth and realizes minute surface with depression bar (4) top tapered groove and seal; Depression bar (4) is installed on the central hole of kettle cover (3), slide up and down at center pit, depression bar (4) realizes the slipper seal between kettle cover (3) by the O-ring seal one (81) that bar is installed, depression bar (4) lower end is processed with the groove laying steel pipe sample (6), copper gasket seal one (91) is placed between steel pipe sample (6) and depression bar (4), steel pipe sample (6) lower end is positioned over kettle (5) inner bottom part groove, the copper gasket seal two (92) of same placement in groove.
2. HTHP cementing concrete ring integrality Simulation evaluation test instrument according to claim 1, it is characterized in that, having been linked closely mounting rod (1) by screw thread in the described oblique side of kettle cover (3) two, is connected with the screw thread two (72) of kettle (5) for screwing kettle cover (3).
3. HTHP cementing concrete ring integrality Simulation evaluation test instrument according to claim 1, it is characterized in that, described steel pipe sample (6) to use steel pipe to be external diameter be 25 ~ 26mm, internal diameter is 20 ~ 21mm, and length is the stainless-steel pipe (13) of 79 ~ 81mm.
4. HTHP cementing concrete ring integrality Simulation evaluation test instrument according to claim 1, it is characterized in that, the hollow cylindrical tube that described kettle (5) is external diameter 110mm, dark 3mm is had bottom inner core, the groove of diameter 26mm, for laying copper gasket seal two (91), cylinder inside top car has screw thread two (72) and O-ring seal two (82) mounting groove to be used for installing and sealing kettle cover (3).
5. HTHP cementing concrete ring integrality Simulation evaluation test instrument according to claim 1, it is characterized in that, the hollow circuit cylinder bar that described depression bar (4) is diameter 25mm, shaft is processed with the wide 3mm of twice, dark 2mm groove, for installing O-ring seal one (81), bar bottom internal diameter 26mm, for installing at the bottom of copper gasket seal one (91) seal bar and steel pipe sample (6) upper end, masthead portion is processed with conical socket, groove surface, through mirror polish process, realizes being tightly connected with the minute surface of pressure head (2).
6. HTHP cementing concrete ring integrality Simulation evaluation test instrument according to claim 1, it is characterized in that, described kettle cover (3) top is processed with diameter 15mm, screw thread one (71) eyelet of dark 20mm, for assembling pressure head (2), kettle cover (3) is also processed with confined pressure passage (11), channel roof is processed with high pressure line joint box for connecting confined pressure pipeline, both sides are processed with mounting rod box for installing mounting rod (1), middle part is for screw thread two (72) is for connecting kettle (5), bottom is left O-ring seal two (82) and is installed groove, match with kettle (5), for the connection of sealing with kettle (5), bottom is processed with the center pit of diameter 26mm, for the up and down passage of depression bar (4), hole inwall is through polishing, be convenient to realize dynamic seal (packing) with depression bar O-ring seal one (81).
7. HTHP cementing concrete ring integrality Simulation evaluation test instrument according to claim 1, it is characterized in that, described pressure head (2) is hollow screw mandrel, shaft diameter 25mm, match with kettle cover (3) top eyelet, pressure head (2) top is left high pressure line and is installed box for connecting displacement pressure passage (10) pipeline, and bottom is taper tip, and the conical surface is convenient to through mirror polish process the minute surface realized with depression bar top groove and is tightly connected.
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| CN201520844546.5U CN205103100U (en) | 2015-10-28 | 2015-10-28 | HTHP well cementation cement ring integrality simulation evaluation test appearance |
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| CN201520844546.5U CN205103100U (en) | 2015-10-28 | 2015-10-28 | HTHP well cementation cement ring integrality simulation evaluation test appearance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300803A (en) * | 2015-10-28 | 2016-02-03 | 西安石油大学 | HTHP well cementation cement sheath integrity simulation evaluation tester |
| CN110320131A (en) * | 2019-07-10 | 2019-10-11 | 中国石油大学(华东) | PH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device and evaluation method |
| CN111044382A (en) * | 2019-12-30 | 2020-04-21 | 西南石油大学 | Experimental device for hydraulically simulating non-uniform confining pressure of casing and using method |
| CN111766166A (en) * | 2020-07-17 | 2020-10-13 | 西南石油大学 | Device and method for measuring integrity of casing damaged by alternating internal pressure of casing |
-
2015
- 2015-10-28 CN CN201520844546.5U patent/CN205103100U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300803A (en) * | 2015-10-28 | 2016-02-03 | 西安石油大学 | HTHP well cementation cement sheath integrity simulation evaluation tester |
| CN110320131A (en) * | 2019-07-10 | 2019-10-11 | 中国石油大学(华东) | PH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device and evaluation method |
| CN111044382A (en) * | 2019-12-30 | 2020-04-21 | 西南石油大学 | Experimental device for hydraulically simulating non-uniform confining pressure of casing and using method |
| CN111044382B (en) * | 2019-12-30 | 2024-03-22 | 西南石油大学 | Experimental device for hydraulic type simulation of non-uniform confining pressure of sleeve and use method |
| CN111766166A (en) * | 2020-07-17 | 2020-10-13 | 西南石油大学 | Device and method for measuring integrity of casing damaged by alternating internal pressure of casing |
| CN111766166B (en) * | 2020-07-17 | 2024-03-22 | 西南石油大学 | Device and method for measuring integrity of cement sheath damaged by alternating internal pressure of sleeve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160323 Termination date: 20161028 |