CN110043221A - A kind of device measuring cementing concrete ring microannulus - Google Patents
A kind of device measuring cementing concrete ring microannulus Download PDFInfo
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- CN110043221A CN110043221A CN201910467549.4A CN201910467549A CN110043221A CN 110043221 A CN110043221 A CN 110043221A CN 201910467549 A CN201910467549 A CN 201910467549A CN 110043221 A CN110043221 A CN 110043221A
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- 239000004568 cement Substances 0.000 claims abstract description 129
- 239000000523 sample Substances 0.000 claims abstract description 77
- 238000006073 displacement reaction Methods 0.000 claims abstract description 42
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 claims abstract description 19
- 239000011440 grout Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000003032 molecular docking Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 37
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 description 14
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of device measuring cementing concrete ring microannulus, is related to oil gas field cementing technology field, comprising: cement mold, the cement mold include two casings, and the annular space of bottom end closure is equipped between two casings；Microannulus measuring device, the microannulus measuring device includes probe and displacement measuring device, the probe includes the body of rod and the pedestal for being connected to body of rod one end, the pedestal is located at the tube wall in the annular space and close to one of described sleeve pipe and is arranged, and the body of rod other end is pierced by along the radial activity from the aperture being arranged in the described sleeve pipe of pedestal of the annular space；Institute's displacement measurement device is used to measure during grout cures the body of rod in the displacement radially of the annular space.The device of the embodiment of the present application can survey the radial displacement of cement sheath after cement slurry sets, corresponding with underground actual condition.
Description
Technical field
This application involves oil gas field cementing technology fields, and in particular to a kind of device for measuring cementing concrete ring microannulus.
Background technique
Solve the problems, such as that well cementing cement paste for oil-gas field anti-channeling is the key that improve cementing quality, protection oil-gas Layer.
During well cementation time is solidifying, cement slurry aquation is divided to gelling phase and two stages of hardening.
Gelling phase, cement slurry is constantly weightless, and effective head of liquid after cement slurry weight loss is less than formation fluid pressure
When, formation fluid is just scurried into well in cement slurry.The main means for solving the anti-channelling of this stage are to improve the slurry column for pressing steady coefficient
Structure, using the strong mortar architecture of anti-channeling ability, use cement channelling instrument Simulation evaluation.
Hardening phase, the volume of general cement can all be shunk, and make the of the first interface, cement and the stratum of casing and cement
There is micro-loop empty gap in second interface, destroys sealing integrity, causes crossflow or even well head annular space with pressure, gives production band
Carry out serious security risk.The effective means for preventing cement sheath micro-loop empty gap is that suitable species, suitable are added in cement slurry
The expansive agent for cement slurry of amount.
The hydration reaction of cement is extremely complex physical and chemical reaction, some cement slurry axial expansions, but radial
It shrinks；Some cement slurry outer diameters expand, and internal diameter, which also expands, to become larger, i.e. microannulus occurs for the first interface；Outside some cement slurries
Diameter expansion becomes larger, and internal diameter expansion becomes smaller, and double interfaces are all without microannulus.Casing and cementing pursue be in underground temperature and pressure,
First interface and second contact surface have the cement-slurry method of microdilatancy all without microannulus.
Current dilatometer is mainly " low temperature opening is around-France ", " volume expansion method ", " axial displacement method " three classes.They from
Different dimensions evaluate cement swelliong power, but all exist with underground actual condition correspondence it is poor, can not comment at high temperature under high pressure
Valence most seals the shortcomings that " micro-loop empty gap " of essential characteristic.
Summary of the invention
One embodiment of the application provides a kind of device for measuring cementing concrete ring microannulus, comprising: cement mold, the water
Mud mould tool includes two casings, and the annular space of bottom end closure is equipped between two casings；Microannulus measuring device, the micro-loop
Gap measuring device includes probe and displacement measuring device, and the probe includes the body of rod and the pedestal for being connected to body of rod one end, described
Pedestal is located at the tube wall in the annular space and close to one of described sleeve pipe and is arranged, and the body of rod other end is along the ring
The radial activity from the aperture being arranged in the described sleeve pipe of pedestal in shape space is pierced by；Institute's displacement measurement device is for surveying
Displacement radially of the body of rod in the annular space during amount grout cures.
The utility model has the advantages that
The device of the measurement cementing concrete ring microannulus of the embodiment of the present application, the cement sheath after being cement slurry sets of measurement
Radial displacement, i.e. the radial contraction amount of cement sheath, radial contraction amount namely cement sheath and inner sleeve or " micro- between outer tube
Annular clearance " (i.e. microannulus) value.Compared with existing cement and expanded power evaluation method, cement sheath measured by the embodiment of the present application
Radial displacement, i.e., evaluable " the micro-loop empty gap " for most sealing essential characteristic is corresponding with underground actual condition, to well cementation water
The evaluation of mud dilation ability is more accurate.
In addition, the device of the measurement cementing concrete ring microannulus of the embodiment of the present application can continuously measure the radial position of cement sheath
It moves, would know that the change procedure of cement sheath inner and outer diameter.
Detailed description of the invention
Attached drawing is used to provide to further understand technical scheme, and constitutes part of specification, with this
The embodiment of application is used to explain the technical solution of the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the structural schematic diagram of the device of the measurement cementing concrete ring microannulus of one embodiment of the application；
Fig. 2 is the mounting structure schematic diagram of the second probe and the second elastic limit device in Fig. 1；
Fig. 3 is the cross section structure schematic diagram of the cement mold of one embodiment of the application；
Fig. 4 is the cross section structure schematic diagram that the outer tube of the cement mold of Fig. 3 deforms in cement sheath expansion process；
Appended drawing reference are as follows: 11, annular space, 12, outer tube, 13, inner sleeve, 14, pedestal, 15, separation sleeve, 16, lifting
Portion, 17, annular protrusion, 21, second displacement measuring device, the 22, second probe, the body of rod of the 221, second probe, 222, second visits
The pedestal of head, the 23, first displacement measuring device, the 24, first probe, the body of rod of the 241, first probe, the seat of the 242, first probe
Body, the 31, second bushing, the 32, second clamping cap, the 33, second elastic component, the 41, first attachment base, the 42, second attachment base, 43, bullet
Spring, 44, nut, 45, connecting rod.
Specific embodiment
Further illustrate the technical solution of the application below with reference to the accompanying drawings and specific embodiments.It is understood that
It is that specific embodiment described herein is used only for explaining the application, rather than the restriction to the application.
As depicted in figs. 1 and 2, one embodiment of the application provides a kind of device for measuring cementing concrete ring microannulus, including
Cement mold and microannulus measuring device.
The cement mold includes two casings, respectively inner sleeve 13 and outer tube 12, inner sleeve 13 and outer tube 12
Between be equipped with bottom end closure annular space 11, the annular space 11 in it carry out cement slurry solidification process.Ring
The ring width in shape space 11 can be identical as well cementation annular clearance, for example can take 20mm.
Cement slurry is after aquation loses flowability to final set, it may occur however that Lattice Contraction (then cement sheath contraction) or lattice
It expands (then cement sheath expansion).In case of Lattice Contraction, then the cement sheath for solidifying formation can be detached from inner sleeve 13 or/and housing
The tube wall of pipe 12, to form the first interface microannulus or/and second contact surface microannulus.In case of lattice dilatation, then solidify
The inner ring surface or/and outer ring surface of the cement sheath of formation can be cemented together with the tube wall of inner sleeve 13 or/and outer tube 12, and two
Interface will not generate microannulus.In case of lattice dilatation, then swell increment (the i.e. water of measurement cement sheath outer ring surface is generally required
The swell increment of mud ring outer diameter).Therefore, to enable the device of the measurement cementing concrete ring microannulus of the present embodiment to measure the first boundary
While face microannulus or/and second contact surface microannulus, additionally it is possible to the swell increment of cement sheath outer ring surface is measured, it is optionally, described
The outer tube 12 of cement mold is set as that deformation can be expanded, so that its caliber becomes larger under the effect of cement sheath expansive force.But
Be, it is to be understood that measurement the first interface microannulus or/and second contact surface microannulus, whether outer tube 12 can be occurred on
It states dilatancy not require, i.e. outer tube 12 can be set to same inner sleeve 13 equally and cannot deform or outer tube
12 may be set to be above-mentioned dilatancy can occur.
In following embodiment, with outer tube 12 it is set as that deformation can be expanded so that its caliber expands masterpiece in cement sheath
Illustrate for becoming larger under.
The microannulus measuring device is used to measure radial contraction displacement or the expansion displacement of cement sheath after cement slurry sets.
The microannulus measuring device can be set to two sets, and respectively the first microannulus measuring device and the measurement of the second microannulus fill
It sets, the first microannulus measuring device can be used for measuring after cement slurry sets between cement sheath and inner sleeve 13 (i.e. the first interface)
Microannulus, the second microannulus measuring device can be used for measuring after cement slurry sets (i.e. the second boundary between cement sheath and outer tube 12
Face) microannulus.The measuring principle of two sets of microannulus measuring devices can be identical, and two sets of microannulus measuring devices independently measure.
Can also only it be arranged as needed between a set of microannulus measuring device measurement cement sheath and inner sleeve 13 or cement sheath and housing
Microannulus between pipe 12.
In one exemplary embodiment, two sets of microannulus measuring devices are set, and the first microannulus measuring device includes
First probe 24 and the first displacement measuring device 23, the first probe 24 include the body of rod 241 and the pedestal for being connected to 241 one end of the body of rod
242, the pedestal 242 of the first probe is located in the annular space 11 and is arranged close to the tube wall of inner sleeve 13, the first probe
241 other end of the body of rod is pierced by along the radial activity from the aperture being arranged on inner sleeve 13 of the annular space 11, and is extended to
The outside of outer tube 12.Wherein, 241 other end of the body of rod of the first probe sequentially passes through the first aperture of inner sleeve, inner sleeve second
The first aperture of aperture and outer tube.Alternatively, 241 other end of the body of rod of the first probe is along the radial from inner sleeve of the annular space 11
Activity is pierced by the first aperture of inner sleeve being arranged on pipe 13, and is located in inner sleeve 13.Wherein, the pedestal 242 of the first probe
For being consolidated in inside cement sheath during grout cures are at cement sheath, the pedestal 242 of the first probe is shunk in cement sheath
It is able to drive the moving radially along the annular space 11 of the body of rod 241 of the first probe in the process.The first displacement measurement dress
23 are set for measuring displacement radially of the body of rod 241 in the annular space 11 of the first probe during grout cures.
First displacement measuring device 23 can measure the radial displacement of the other end of the body of rod 241 of the first probe, such as by first
The measuring head of measuring system 23 connect or abuts with the other end of the body of rod 241 of the first probe, the body of rod 241 of the first probe
It moves radially, can drive or push the measuring head of the first displacement measuring device 23 mobile, and then the first probe can be measured
The radial displacement of the body of rod 241.First displacement measuring device 23 can using differential transformer etc. can linear displacement displacement
Measuring device.
241 other end of the body of rod of first probe extends to the outside of outer tube 12, for avoid the body of rod 241 of the first probe with
Cement slurry in annular space 11 is consolidated, and the cement mold further includes separation sleeve 15, the both ends of the separation sleeve 15
Be respectively arranged in 15 mounting hole of separation sleeve being arranged on inner sleeve 13 and outer tube 12, first probe the body of rod 241 from it is described every
It is passed through from activity in set 15.Wherein, one end of separation sleeve 15 is set in first aperture of outer tube, and the other end can be set to institute
It states in the first aperture of inner sleeve or in the second aperture of inner sleeve.During the installation process, separation sleeve 15 first can be inserted into inner sleeve
13 and outer tube 12 in 15 mounting hole of separation sleeve that is arranged, then the body of rod 241 of the first probe is inserted into from separation sleeve 15
Then the pedestal 242 of first probe is threadedly connected to one end of the body of rod 241 by position.When the other end of separation sleeve 15 is set to inner sleeve
When in the second aperture of pipe, the first bushing can be set in first aperture of inner sleeve, which can protrude from interior
The first aperture of casing setting plays the role of certain support guide to the body of rod 241 of the first probe.
Second microannulus measuring device includes the second probe 22 and second displacement measuring device 21, and the second probe 22 includes bar
Body 221 and the pedestal 222 for being connected to 221 one end of the body of rod, the pedestal 222 of the second probe are located in the annular space 11 and close
The tube wall of outer tube 12 is arranged, and 221 other end of the body of rod of the second probe is along the radial from outer tube 12 of the annular space 11
Activity is pierced by the second aperture of outer tube of setting.Wherein, the pedestal 222 of the second probe is used in grout cures into cement sheath
It is consolidated in inside cement sheath in the process, the pedestal 222 of the second probe is able to drive second during cement sheath contraction or expansion
The moving radially along the annular space 11 of the body of rod 221 of probe.Since outer tube 12 can expand deformation, then in cement sheath
Cement sheath can push the outer tube 12 and drive the body of rod 221 of the second probe together along annular space in outer diameter expansion process
11 move radially.And when cement sheath outer diameter is shunk, cement sheath then drives the second probe 22 synchronous together along annular space 11
Radial direction move round about, between cement sheath outer diameter and outer tube 12 be second contact surface there is microannulus.The second
Measuring system 21 be used to measure the body of rod 221 of the second probe during grout cures the annular space 11 radially
Displacement.Second displacement measuring device 21 can measure the radial displacement of the other end of the body of rod 221 of the second probe, such as will
The measuring head of second displacement measuring device 21 connect or abuts with the other end of the body of rod 221 of the second probe, the second probe
The body of rod 221 moves radially, and can drive or push the measuring head of second displacement measuring device 21 mobile, and then can measure the
The radial displacement of the body of rod 221 of two probes.Second displacement measuring device 21 can use differential transformer etc. can linear position
The displacement measuring device of shifting.
Two probes of two sets of microannulus measuring devices i.e. the first probe 24 and the second probe 22, the two is in cement mold
On mounting height can be identical or different.
Two sets of microannulus measuring devices can also include elastic limit device, and the elastic limit device includes elasticity
Part, the tube wall that the elastic component is used to that the pedestal of probe to be made to be contradicted under the effect of its elastic force in respective sleeve.Setting elasticity limit
Position device contradicts the pedestal of probe in respective sleeve or on other component, surveys in this way, simulating in each grout cures
During amount, the pedestal of probe position in the radial direction be it is fixed, can reduce because its position be not fixed generation measurement miss
Difference.Illustratively, the first microannulus measuring device further includes the first elastic limit device, and the first elastic limit device is for making the
The pedestal 242 of one probe contradicts on the tube wall of inner sleeve 13 under the effect of its elastic force；Second microannulus measuring device further includes
Second elastic limit device, the second elastic limit device is for contradicting the pedestal 222 of the second probe under the effect of its elastic force
On the tube wall of outer tube 12.Both first elastic limit device and the second elastic limit device structure can be identical.
As shown in Fig. 2, the second elastic limit device includes the second bushing 31 and the second elastic component 33, second elastic component
33 can be spring, and second bushing 31 is set in the second aperture of outer tube being arranged on outer tube 12, second bushing
31 parts (i.e. the part that the second bushing 31 protrudes from 12 outside of outer tube) for protruding from the second aperture of outer tube are arranged with described
Spring, the spring are in compressive state, and one end of which is fixed on outer tube 12 or the second bushing 31, the other end is fixed on second
On the body of rod 221 of probe.In the present embodiment, the second elastic limit device tenses the body of rod of the second probe using the elastic force of its spring
221, the pedestal 222 of the second probe is abutted against on the tube wall of outer tube 12 or on the second bushing 31.
For convenience of the installation of the second elastic limit device, second elastic limit device further includes the second clamping cap 32,
Second clamping cap 32 can be threadedly connected to the other end of the body of rod 221 of the second probe, and one end of the spring can contradict outside
On the lateral wall of casing 12, the other end is contradicted in the second clamping cap 32.The end face of second clamping cap 32 is outer with outer tube 12
Gap between side wall need to be not less than the maximum radial shrinkage of cement.In installation process, first the second bushing 31 can be mounted on
In the second aperture of outer tube, 31 inner wall of the second bushing applies stop-leak compound, and the body of rod 221 of the second probe is pierced by from the second bushing 31
12 outside of outer tube, then covers upper spring on the second bushing 31, the second clamping cap 32 is then threaded in the second probe
The body of rod 221 the other end, install the second clamping cap of Manual press 32, should flexibly, compress and pop up and is unrestricted.
First elastic limit device may be mounted at the first tapping of outer tube, and set-up mode is similar to the second elasticity limit
Position device, in the embodiment of the first elastic limit device, the separation sleeve 15 can be similar to the second elastic limit device
Second bushing 31.Illustratively, one end of the separation sleeve 15 protrudes from the outside of the outer tube 12, and the separation sleeve 15 is convex
Part for 12 outside of outer tube is arranged with spring, and the spring one end is fixed on the body of rod 241 of the first probe, separately
One end is fixed on the separation sleeve 15 or the outer tube 12, and the spring is in compressive state and makes the pedestal of the first probe
242 contradict on the tube wall of the inner sleeve 13.Similarly, for convenience of the installation of the first elastic limit device, the first elasticity limit
Position device further includes the first clamping cap, and the first clamping cap can be threadedly connected to the other end of the body of rod 241 of the first probe, described
One end of spring can contradict in the first clamping cap, and the other end contradicts on the lateral wall of outer tube 12.First elastic spacing dress
Other settings set and mounting means are repeated no more with the second elastic limit device.
In the present embodiment, cement slurry is solidified in the annular space 11 of cement mold, simulates underground cementing slurry
Solidification process.It is cement after cement slurry sets, is solidified in annular space 11, also as cement sheath.With hardening of cement
The progress in stage, cement slurry sets at cement sheath volume can expand or shrink, thus generate certain radial contraction or
Swell increment.The radial contraction or swell increment of cement sheath are affected to the anti-channeling performance evaluation of cement slurry.
Probe is arranged in the present embodiment in the annular space of cement mold 11 in advance, as the solidification of cement slurry is by probe
Pedestal is fixed in inside cement sheath, passes through the bar of convergent force or expansive force drive probe of the cement sheath during contraction or expansion
Body moves in the radial direction cement sheath, and radial direction of the body of rod in cement sheath of probe is measured using displacement measuring device
On displacement, and then cement sheath shrinkage in the radial direction or swell increment can be measured, radial contraction amount namely cement sheath and casing
Between microannulus size, it is corresponding with underground actual condition, it is more accurate to the evaluation of cementing slurry swelliong power.This
Outside, the device of the measurement cement microannulus of the embodiment of the present application can continuous measuring probe the body of rod radial displacement, so as to
Know the change procedure of cement sheath radial contraction or swell increment.In the present embodiment, the pedestal of probe is arranged close to casing wall, then
Microannulus value between the more close true cement of the radial contraction amount of measured cement sheath and casing.
Shown in as shown in Figure 1, Figure 3 and Figure 4, in the present embodiment, the cement mold further includes pedestal 14, inner sleeve 13 and housing
The setting of pipe 12 forms the annular space 11 on pedestal 14, and the outer tube 12 is set as that deformation can be expanded, so that its
Caliber becomes larger under the effect of cement sheath expansive force；Cement sheath can push the outer tube 12 and band in cement sheath expansion process
Move the body of rod popped one's head in moving radially along the annular space 11 together.It is illustratively, described outer about the structure of outer tube 12
Casing 12 may include the arc-shaped plate of two or more numbers, and the arc-shaped plate of two or more numbers surrounds institute
Outer tube 12 is stated, sealed set and use connection component connection between two adjacent arc-shaped plates；Masterpiece is expanded in cement sheath
Under, can generate relative displacement between two adjacent arc-shaped plates makes the caliber of the outer tube 12 become larger.
Illustratively, the number of the arc-shaped plate can be set to two, each arc-shaped plate semicircular in shape structure, and two
The connection component is arranged in the joint of a arc-shaped plate.One or more institutes can be set between two adjacent arc-shaped plates
State connection component.
In the present embodiment, inner sleeve 13 and outer tube 12 can be all made of metal material and be made, such as stainless steel material.It is described
Two adjacent arc-shaped plates are closely joined together by connection component when cement slurry does not solidify also and generates expansive force, subsequent
Cement slurry sets enable to generation relative displacement between two adjacent arc-shaped plates to make outer tube 12 when generating expansive force
Caliber becomes larger, i.e., outer tube 12 expands deformation.
Illustratively, the connection component includes the first attachment base 41, the second attachment base 42, connecting rod 45 and spring 43,
First attachment base 41 and the second attachment base 42 are separately positioned on the arc-shaped plate of adjacent two, described 45 one end of connecting rod
It is fixed on the first attachment base 41, other end activity passes through the rod aperture being arranged on the second attachment base 42, and the spring 43 is set in
The docking section of the arc-shaped plate of adjacent two is set to be close together in the connecting rod 45 and using its own elastic force.
First attachment base 41, the second attachment base 42 can be oppositely arranged, the first attachment base 41 and the second attachment base 42
The docking section that can be set to two arc-shaped plates adjacent when the two is closely packed together is close together, described in adjacent two
It is in sealing state between arc-shaped plate.The docking section (namely joint) of the arc-shaped plate of adjacent two, which can be overlapped, to be set
It sets, can smear the modes such as stop-leak compound using sealing elements such as setting sealing strips between the two and be sealed, to prevent water mud from existing
Leakage before solidification.
For convenient for connection component installation and removal, the other end of the connecting rod 45 is threaded with nut 44, institute
Spring 43 is stated in compressive state, one end is connected on the nut 44, and the other end is connected on the second attachment base 42.Wherein,
Described 45 one end of connecting rod can be threadedly connected to first attachment base 41, and another nut fastening can be used in end.
In the present embodiment, after the annular space 11 of cement slurry (being initially flowable) injection cement mold, cement slurry
Start to solidify.As shown in figure 3, passing through the spring 43 itself of the connection component when cement slurry does not solidify also and generates expansive force
Elastic force so that the docking section of the arc-shaped plate of adjacent two is close together, each two adjacent arc-shaped plates it
Between close proximity.As shown in figure 4, after aquation loses flowability to final set lattice occurs for cement slurry with the solidification of cement slurry
Expansion, then solidify generation expansive force overcome the connection component spring 43 elastic force, between two adjacent arc-shaped plates
Generate relative displacement, outer tube 12 expands deformation, and caliber becomes larger, but not spillage (cement slurry has solidified).If hair
Raw Lattice Contraction, the then cement sheath for solidifying formation can be detached from the inner wall of outer tube 12, generate micro-loop empty gap.
14 top surface of pedestal is equipped with annular protrusion 17, and the bottom end of the outer tube 12 is placed in 14 top surface of pedestal
On, the inner wall of the outer tube 12 is close to the lateral wall setting of the annular protrusion 17；The bottom end of the inner sleeve 13 is fixed in
On 14 top surface of pedestal, the outer wall of the inner sleeve 13 is close to the inner sidewall setting of the annular protrusion 17.In cement mold
In installation process, it can be applied at the inner sidewall and lateral wall of the bottom and annular protrusion of inner sleeve 13 and outer tube 12 17
Stop-leak compound is smeared, guarantees that the bottom of annular space 11 will not leak cement slurry.Wherein, the annular protrusion 17 can play positioning and make
With convenient for positioning to the installation site of outer tube 12 and inner sleeve 13 on pedestal 14, outer tube 12 and inner sleeve 13 can
Coaxial arrangement easy to accomplish.In addition, annular protrusion 17 may also function as position-limiting action, can be limited when grout cures are shunk
Outer tube 12 moves inward, and limits inner sleeve 13 and move outward, in this way, two interfaces that will not be generated to cement shrinkage
The size of microannulus impact, when measuring the microannulus at two interfaces of cement, measurement result is also more accurate.In addition, ring
Shape protrusion 17 can limit the movement of outer tube 12 and inner sleeve 13 when cement solidification is shunk, and occur in cement solidification swollen
It when swollen, is then moved outward without limitation on outer tube 12, outer tube 12 then can be expanded deformation by cement sheath expansive force (i.e.
Caliber becomes larger), it will not influence the measurement of cement sheath swell increment.
14 top surface of pedestal is equipped with lifting portion 16, and the lifting portion 16 is located in the inner sleeve 13, for connecting
Hanging apparatus is to sling mold when disposing mold.The lifting portion 16 can be a fixing seat, pacify in the fixing seat
Dismountable Shackle assembly is filled to connect with hanging apparatus.
The cement mold of the present embodiment can inject cement slurry in annular space 11 in grout cures simulation test
It is placed in curing autoclave, by adjusting the temperature and pressure state in curing autoclave, the cured high temperature of analog mine water mud is high
Pressure ring border, measurement result is also more close to actual conditions.
The outer tube 12 of the cement mold of the present embodiment is split type structure, after grout cures test, can conveniently be taken
The cement sheath that solidifies out and reuse cement mold.
The measuring device of the application can realize that cementing slurry solidification simulation and cement sheath internal-and external diameter continuously measure.It is operated
Simply, repeatability is high, good with underground working matching, the expansion of the anti-microannulus channelling suitable for the well cementation of petroleum and natural gas well
The developmental research of slurry design and cement expansive material.
In the description of the embodiment of the present application unless specifically defined or limited otherwise, term " connection ", " fixed company
Connect ", " installation ", " assembly " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；Term " installation ", " connection ", " being fixedly connected " can be directly connected, can also indirectly connected through an intermediary, or
It is the connection inside two elements.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the embodiment of the present application.
Claims (10)
1. a kind of device for measuring cementing concrete ring microannulus characterized by comprising
Cement mold, the cement mold include two casings, and the annular space of bottom end closure is equipped between two casings；
Microannulus measuring device, the microannulus measuring device include probe and displacement measuring device, and the probe includes the body of rod
With the pedestal for being connected to body of rod one end, the pedestal is located at the tube wall in the annular space and close to one of described sleeve pipe
Setting, radial from the aperture that close to the described sleeve pipe of pedestal in is arranged activity of the body of rod other end along the annular space
It is pierced by；
Institute's displacement measurement device be used to measure the body of rod during grout cures the annular space radially
Displacement.
2. the device of measurement cementing concrete ring microannulus as described in claim 1, which is characterized in that
The microannulus measuring device further includes elastic limit device, and the elastic limit device includes elastic component, the elasticity
The tube wall that part is used to that the pedestal of the probe to be made to be contradicted under the effect of its elastic force in described sleeve pipe.
3. the device of measurement cementing concrete ring microannulus as claimed in claim 2, which is characterized in that
The elastic limit device further includes bushing, and the elastic component is spring, what the bushing was arranged in described sleeve pipe
In the aperture, the part that the bushing protrudes from the aperture is arranged with the spring, and the spring is in compressive state,
One end is fixed on described sleeve pipe or the bushing, and the other end is fixed on the body of rod of the probe.
4. the device of measurement cementing concrete ring microannulus as described in claim 1, which is characterized in that
Including two sets of microannulus measuring devices, respectively the first microannulus measuring device and the second microannulus measuring device；
Described two casings are respectively inner sleeve and outer tube；
The pedestal of the probe of the first microannulus measuring device is arranged close to the tube wall of the inner sleeve, second microannulus
The pedestal of the probe of measuring device is arranged close to the tube wall of the outer tube.
5. the device of measurement cementing concrete ring microannulus as claimed in claim 4, which is characterized in that
The body of rod other end of the probe of the first microannulus measuring device is set from inner sleeve along the radial of the annular space
After activity is pierced by the aperture set, the outside of outer tube is extended to；
The cement mold further includes separation sleeve, the both ends of the separation sleeve be respectively arranged on be arranged on inner sleeve and outer tube every
From in set mounting hole, the activity from the separation sleeve of the body of rod of the probe of the first microannulus measuring device is passed through.
6. the device of measurement cementing concrete ring microannulus as claimed in claim 5, which is characterized in that
One end of the separation sleeve protrudes from the outside of the outer tube, and the separation sleeve protrudes from the portion on the outside of the outer tube
Divide and be arranged with spring, the spring one end is fixed on the body of rod of the probe of the first microannulus measuring device, and the other end is solid
It is scheduled on the separation sleeve or the outer tube, the spring is in compressive state and makes the first microannulus measuring device
The pedestal of probe contradicts on the tube wall of the inner sleeve.
7. the device of measurement cementing concrete ring microannulus as described in claim 1, which is characterized in that
Described two casings are respectively inner sleeve and outer tube, and the outer tube is set as that deformation can be expanded, so that it is managed
Diameter becomes larger under the effect of cement sheath expansive force；
Cement sheath can push the outer tube and drive the body of rod empty along the annular together in cement sheath expansion process
Between move radially.
8. the device of measurement cementing concrete ring microannulus as claimed in claim 7, which is characterized in that
The outer tube includes the arc-shaped plate of two or more numbers, and the arc-shaped plate of two or more numbers encloses
At the outer tube, sealed set and use connection component connection between two adjacent arc-shaped plates；In cement sheath expansive force
Under effect, can generate relative displacement between two adjacent arc-shaped plates makes the caliber of the outer tube become larger.
9. the device of measurement cementing concrete ring microannulus as claimed in claim 8, which is characterized in that
The connection component includes two attachment bases, connecting rod and spring, and two attachment bases are separately positioned on two adjacent institutes
It states on arc-shaped plate, described connecting rod one end is fixed therein on an attachment base, and other end activity passes through another attachment base
The rod aperture of upper setting, the spring are set in the connecting rod and are made two adjacent arc-shapeds using its own elastic force
The docking section of plate is close together.
10. the device of measurement cementing concrete ring microannulus as claimed in claim 8, which is characterized in that
The cement mold further includes pedestal, and the base top surface is equipped with annular protrusion, and the bottom end of the outer tube is placed in
On the base top surface, the inner wall of the outer tube is close to the lateral wall setting of the annular protrusion；The bottom end of the inner sleeve
It is fixed on the base top surface, the outer wall of the inner sleeve is close to the inner sidewall setting of the annular protrusion.
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| CN201910467549.4A CN110043221A (en) | 2019-05-31 | 2019-05-31 | A kind of device measuring cementing concrete ring microannulus |
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| CN201910467549.4A CN110043221A (en) | 2019-05-31 | 2019-05-31 | A kind of device measuring cementing concrete ring microannulus |
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