CN106052964B - A kind of drilling pressure environment simulator and using method thereof - Google Patents
A kind of drilling pressure environment simulator and using method thereof Download PDFInfo
- Publication number
- CN106052964B CN106052964B CN201610363736.4A CN201610363736A CN106052964B CN 106052964 B CN106052964 B CN 106052964B CN 201610363736 A CN201610363736 A CN 201610363736A CN 106052964 B CN106052964 B CN 106052964B
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- China
- Prior art keywords
- pit shaft
- pressure environment
- environment simulator
- capping apparatus
- cable
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Links
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 60
- 229910052757 nitrogen Inorganic materials 0.000 claims description 30
- 210000004907 gland Anatomy 0.000 claims description 25
- 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 description 17
- 238000012360 testing method Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000011897 real-time detection Methods 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000008054 signal transmission Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of drilling pressure environment simulator and its application methods, belong to drilling technology field.The drilling pressure environment simulator includes: pit shaft；Capping apparatus is arranged on pit shaft top；Inlet duct passes through capping apparatus and is passed through in the pit shaft；Apparatus for transmitting signal passes through capping apparatus and is passed through in pit shaft；Bracket is connect with pit shaft；Drainage arrangement is arranged in pit shaft bottom end, and drainage arrangement sequentially passes through pit shaft and bracket.Drilling pressure environment simulator of the present invention and its application method provide experimental condition for providing drilling pressure environment, for the detection of the sealing performance of downhole instrument or equipment.
Description
Technical field
The present invention relates to drilling technology field, in particular to a kind of drilling pressure environment simulator and its application method.
Background technique
Drilling well is the important link of geology energy exploration, exploitation etc., in drilling process, to construct and studying needs, often
The relevant parameter that drilling and drilling tool need to often be measured, the related work including drilling trajectory parameters, formation parameter, fluid parameter and drilling tool
Condition parameter etc. is based on this, and domestic and international researcher has developed a large amount of device for subsurface measuring for measuring above-mentioned parameter, but by
There are biggish mud pressures in device for subsurface measuring use environment, therefore designed measuring instrument out is using preceding necessary
Down-hole pressure environmental testing is carried out, is not leaked with keeping measuring instrument in underground.Based on this, a kind of drilling pressure ring is developed
Border simulator wants necessary just to seem to the necessary pressure test conditions of underground measuring instrument equipment offer very much.
Summary of the invention
The present invention provides a kind of drilling pressure environment simulator and its application method, solves or part solves existing skill
There is no the technologies for the drilling pressure environment simulator for providing necessary pressure test conditions to underground measuring instrument equipment to ask in art
Topic.
In order to solve the above technical problems, including: pit shaft the present invention provides a kind of drilling pressure environment simulator；Capping dress
It sets, is arranged on the pit shaft top；Inlet duct is passed through in the pit shaft across the capping apparatus；Apparatus for transmitting signal is worn
The capping apparatus is crossed to be passed through in the pit shaft；Bracket is connect with the pit shaft；Drainage arrangement is arranged in the pit shaft bottom end,
The drainage arrangement sequentially passes through the pit shaft and bracket.
Further, the wellbore bottom is provided with pedestal, and the pedestal offers through-hole.
Further, the capping apparatus includes: gland, setting on the pit shaft, the gland and the pit shaft
Junction is provided with the first O-ring；End cap is arranged above the gland, and the end cap is connect with the pit shaft.
Further, the inlet duct includes: intake valve, is arranged on the capping apparatus；High-voltage tube, with it is described into
Air valve connection.
Further, the apparatus for transmitting signal includes: cable seal device, passes through the capping apparatus and the pit shaft connects
It is logical；Seal plug, setting are provided with the between cable seal device upper end, the seal plug and the cable seal device
Two O-rings；Cable is passed through in the pit shaft across the cable seal device.
Further, the drainage arrangement includes: drain valve, is arranged in pit shaft bottom end, the drain valve sequentially passes through institute
Pit shaft and bracket are stated, the drain valve and the bracket junction are provided with gasket.
It include following the present invention also provides a kind of drilling pressure environment simulator application method based on identical inventive concept
Step: pit shaft being arranged on bracket, will be devices under on the pedestal being put into the pit shaft, fill the water in pit shaft, fills the water
Depth did not had described be devices under at least；Capping apparatus is arranged on the pit shaft, is devices under described and signal
Transfer device connection；High-voltage tube one end of inlet duct is connect with high-pressure nitrogen bottle, opens the intake valve of the inlet duct
To pressurizeing in the pit shaft, by adjusting and keep the output nitrogen pressure of the high-pressure nitrogen bottle, make described tested
The environmental pressure of liquid locating for equipment and the output pressure of high-pressure nitrogen bottle are identical；After being passed through high pressure nitrogen in the pit shaft,
Recording test time closes the air supply of the high-pressure nitrogen bottle after reaching the nominative testing time, while passing through draining dress
The drain valve set releases the high-pressure water gas in the pit shaft；It is devices under taking-up by described, checks test result.
Further, the capping apparatus includes: gland, setting on the pit shaft, the gland and the pit shaft
Junction is provided with the first O-ring；End cap is arranged above the gland, and the end cap is connect with the pit shaft.
Further, the apparatus for transmitting signal includes: cable seal device, passes through the capping apparatus and the pit shaft connects
It is logical；Seal plug, setting are provided with the between cable seal device upper end, the seal plug and the cable seal device
Two O-rings；Cable is passed through in the pit shaft across the cable seal device.
Further, if being devices under needs real time detection signal, signal transmission is carried out by the cable, passes through institute
Cable seal device is stated by the cable seal, so that high pressure gas does not leak in pit shaft, the seal plug is unloaded；If
It is devices under and is not required to real time detection signal, the seal plug is tightened, to prevent stopping leak dew.
Tested instrument equipment is put into pit shaft by drilling pressure environment simulator provided by the invention, and is filled in pit shaft
Water, using high-pressure nitrogen bottle provide pressure be pressed into pit shaft, at this time in pit shaft be tested instrument equipment locating for liquid environmental pressure with
The output pressure of nitrogen cylinder is identical, by keeping the output pressure of nitrogen cylinder for a long time, can realize to instrument tested in pit shaft
Detection of the equipment in pressure environment seal performance energy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of drilling pressure environment simulator provided in an embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, a kind of drilling pressure environment simulator provided in an embodiment of the present invention include: pit shaft 5, capping apparatus,
Inlet duct, apparatus for transmitting signal, bracket 9 and drainage arrangement.
The capping apparatus is arranged on 5 top of pit shaft.
The inlet duct passes through the capping apparatus and is passed through in the pit shaft 5.
The apparatus for transmitting signal passes through the capping apparatus and is passed through in the pit shaft 5.
The bracket 9 is connect with the pit shaft 5.
The drainage arrangement is arranged in 5 bottom end of pit shaft, and the drainage arrangement sequentially passes through the pit shaft 5 and bracket.
The structure of pit shaft 5 is discussed in detail.
5 bottom of pit shaft is fixedly installed pedestal 6.Specifically, in the present embodiment, 5 bottom of pit shaft passes through
Bolt is fixedly installed pedestal 6, and in other embodiments, 5 bottom of pit shaft can such as pivot pin be fixed otherwise
It is provided with pedestal 6.The pedestal 6 offers through-hole, convenient for passing through for water and high pressure gas.
The structure of capping apparatus is discussed in detail.
The capping apparatus includes: gland 3 and end cap 1.
With on the pit shaft 5, it is O-shaped that the gland 3 with 5 junction of pit shaft is provided with first for the gland 3 setting
Circle 4, plays the role of sealing.
The end cap 1 is arranged above the gland 3.The end cap 1 is fixedly connected with the pit shaft 5.Specifically, at this
In embodiment, the end cap 1 is fixedly connected by screw thread with the pit shaft 5, and in other embodiments, the end cap 1 can
Such as pivot pin is fixedly connected with the pit shaft 5 otherwise.Threaded hole, clamp nut 2 and spiral shell are offered on the end cap 1
Pit connection, may make the clamp nut 2 by the gland 3 and the first O by adjusting the screw-in length of the clamp nut 2
Type circle 4 compresses, to realize sealing.
The structure of inlet duct is discussed in detail.
The inlet duct includes: intake valve 17 and high-voltage tube 16.
The intake valve 17 is fixed on the capping apparatus.Specifically, in the present embodiment, the intake valve
17 are threadably secured setting on the capping apparatus, and in other embodiments, the intake valve 17 can pass through other sides
Formula is as described in being fixed at bolt on capping apparatus.
The high-voltage tube 16 is fixedly connected with the intake valve 17.Specifically, in the present embodiment, the high-voltage tube 16
It is fixedly connected by screw thread with the intake valve 17, in other embodiments, the high-voltage tube 16 can otherwise such as
Pivot pin etc. is fixedly connected with the intake valve 17.
The structure of apparatus for transmitting signal is discussed in detail.
The apparatus for transmitting signal includes: cable seal device 12, seal plug 14 and cable 13.
The cable seal device 12 passes through the capping apparatus and is connected to the pit shaft 5.
Seal plug 14 is movably arranged on 12 upper end of cable seal device, the seal plug 14 and the cable seal
The second O-ring 15 is provided between device 12.
The cable 13 passes through the cable seal device 12 and is passed through in the pit shaft 5.
The structure of drainage arrangement is discussed in detail.
The drainage arrangement includes: drain valve 10.
The drain valve 10 is fixed at 5 bottom end of pit shaft.Specifically, in the present embodiment, the drain valve 10 is logical
It crosses to be screwed and be arranged in 5 bottom end of pit shaft, in other embodiments, the drain valve 10 can such as pivot pin otherwise
It is fixed at 5 bottom end of pit shaft.The drain valve 10 sequentially passes through the pit shaft 5 and bracket 9, the drain valve 10 and the branch
9 junction of frame is provided with gasket 11, and the gasket 11 plays the role of sealing.
Based on identical inventive concept, it includes following step that the present invention, which provides a kind of drilling pressure environment simulator application method,
It is rapid:
Step 1, pit shaft 5 is arranged on bracket 9, will be devices under on the pedestal being put into the pit shaft 5, described
Water filling in pit shaft 5, water filling depth did not had described be devices under at least.
Step 2, capping apparatus is arranged on the pit shaft 5, described be devices under is connect with apparatus for transmitting signal.
Step 3,16 one end of the high-voltage tube of inlet duct is connect with high-pressure nitrogen bottle, opens the air inlet of the inlet duct
Valve 17 to pressurizeing in the pit shaft 5, by adjusting and keep the output nitrogen pressure of the high-pressure nitrogen bottle, make the quilt
The environmental pressure of liquid locating for test equipment and the output pressure of high-pressure nitrogen bottle are identical.
Step 4, after being passed through high pressure nitrogen in the pit shaft 5, recording test time, after reaching the nominative testing time,
The air supply for closing the high-pressure nitrogen bottle, opens the drain valve 10 of drainage arrangement, the water and high pressure in the pit shaft 5
Nitrogen is released by the through-hole opened up on pedestal 6.
Step 5, it is devices under taking-up by described, checks test result.
The structure of capping apparatus is discussed in detail.
The capping apparatus includes: gland 3 and end cap 1.
With on the pit shaft 5, it is O-shaped that the gland 3 with 5 junction of pit shaft is provided with first for the gland 3 setting
Circle 4, plays the role of sealing.
The end cap 1 is arranged above the gland 3.The end cap 1 is fixedly connected with the pit shaft 5.Specifically, at this
In embodiment, the end cap 1 is fixedly connected by screw thread with the pit shaft 5, and in other embodiments, the end cap 1 can
Such as pivot pin is fixedly connected with the pit shaft 5 otherwise.Threaded hole, clamp nut 2 and spiral shell are offered on the end cap 1
Pit connection, may make the clamp nut 2 by the gland 3 and the first O by adjusting the screw-in length of the clamp nut 2
Type circle 4 compresses, to realize sealing.
The structure of apparatus for transmitting signal is discussed in detail.
The apparatus for transmitting signal includes: cable seal device 12, seal plug 14 and cable 13.
The cable seal device 12 passes through the capping apparatus and is connected to the pit shaft 5.
Seal plug 14 is movably arranged on 12 upper end of cable seal device, the seal plug 14 and the cable seal
The second O-ring 15 is provided between device 12.
Step 2 is discussed in detail.
If described be devices under needs real time detection signal, signal transmission is carried out by the cable 13, by described
Cable seal device 12 seals the cable 13, so that high pressure gas does not leak in the pit shaft 5, by the seal plug
14 unloadings.
If described be devices under is not required to real time detection signal, the seal plug 14 is tightened, to prevent stopping leak dew.
The embodiment of the present invention is introduced in order to clearer, is introduced from the application method of the embodiment of the present invention below.
Pit shaft 5 will be arranged on bracket 9 by the first fixing bolt 7 and the second fixing bolt 8, be put being devices under
Enter on the pedestal in pit shaft 5, filled the water in pit shaft 5, water filling depth, which at least, not to be devices under.By gland 3 setting with well
On cylinder 5, gland 3 and 5 junction of pit shaft are provided with the first O-ring 4, play the role of sealing, offer screw thread on end cap 1
Hole, clamp nut 2 are connect with threaded hole, the screw-in length by adjusting clamp nut 2 may make clamp nut 2 by gland 3 and
First O-ring 4 compresses, to realize sealing.Described be devices under is connect with apparatus for transmitting signal.If the tested instrument
Equipment needs real time detection signal, then carries out signal transmission by the cable 13, by the cable seal device 12 by the electricity
Cable 13 seals, so that high pressure gas does not leak in the pit shaft 5, the seal plug 14 is unloaded.If described tested
Instrument equipment is not required to real time detection signal, and the seal plug 14 is tightened, to prevent stopping leak dew.By the high-voltage tube 16 1 of inlet duct
End is connect with high-pressure nitrogen bottle, opens the intake valve 17 of inlet duct to pressurizeing in pit shaft 5, by adjusting and keep high pressure
The output nitrogen pressure of nitrogen cylinder makes the output pressure phase for being devices under the environmental pressure and high-pressure nitrogen bottle of locating liquid
Together.After being passed through high pressure nitrogen in pit shaft 5, recording test time closes the high pressure nitrogen after reaching the nominative testing time
The air supply of bottle, opens the drain valve 10 of drainage arrangement, the water and high pressure nitrogen in the pit shaft 5 pass through on pedestal 6
The through-hole opened up is released.It is devices under taking-up by described, checks test result, it can be achieved that existing to instrument equipment is tested in pit shaft
The detection of pressure environment seal performance energy.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (8)
1. a kind of drilling pressure environment simulator characterized by comprising
Pit shaft (5)；
Capping apparatus is arranged on the pit shaft (5) top；
Inlet duct is passed through in the pit shaft (5) across the capping apparatus；
Apparatus for transmitting signal is passed through in the pit shaft (5) across the capping apparatus；
Bracket (9) is connect with the pit shaft (5)；
Drainage arrangement is arranged in the pit shaft (5) bottom end, and the drainage arrangement sequentially passes through the pit shaft (5) and bracket；
The apparatus for transmitting signal includes:
Cable seal device (12) passes through the capping apparatus and is connected to the pit shaft (5)；
Seal plug (14), setting is in cable seal device (12) upper end, the seal plug (14) and the cable seal
The second O-ring (15) are provided between device (12)；
Cable (13) passes through the cable seal device (12) and is passed through in the pit shaft (5).
2. drilling pressure environment simulator according to claim 1, it is characterised in that:
Pit shaft (5) bottom is provided with pedestal (6), and the pedestal (6) offers through-hole.
3. drilling pressure environment simulator according to claim 1, which is characterized in that the capping apparatus includes:
Gland (3), on the pit shaft (5), it is O-shaped that the gland (3) with the pit shaft (5) junction is provided with first for setting
It encloses (4)；
End cap (1), above the gland (3), the end cap (1) connect with the pit shaft (5) for setting.
4. drilling pressure environment simulator according to claim 1, which is characterized in that the inlet duct includes:
Intake valve (17) is arranged on the capping apparatus；
High-voltage tube (16) is connect with the intake valve (17).
5. drilling pressure environment simulator according to claim 1, which is characterized in that the drainage arrangement includes:
Drain valve (10) is arranged in pit shaft (5) bottom end, and the drain valve (10) sequentially passes through the pit shaft (5) and bracket (9),
The drain valve (10) and the bracket (9) junction are provided with gasket (11).
6. a kind of application method based on drilling pressure environment simulator described in claim 1, which is characterized in that including following
Step:
Pit shaft (5) are arranged on bracket (9), will be devices under on the pedestal being put into the pit shaft (5), in the pit shaft
(5) water filling in, water filling depth did not had described be devices under at least；
Capping apparatus is arranged on the pit shaft (5), described be devices under is connect with apparatus for transmitting signal；
High-voltage tube (16) one end of inlet duct is connect with high-pressure nitrogen bottle, the intake valve (17) for opening the inlet duct is right
Pressurizes in the pit shaft (5), by adjusting and keep the output nitrogen pressure of the high-pressure nitrogen bottle, make described tested
The environmental pressure of liquid locating for equipment and the output pressure of high-pressure nitrogen bottle are identical；
After being passed through high pressure nitrogen in the pit shaft (5), recording test time, after reaching the nominative testing time, described in closing
The air of high-pressure nitrogen bottle supplies, and opens the drain valve (10) of drainage arrangement, the water and high pressure nitrogen in the pit shaft (5)
It is released by the through-hole opened up on pedestal (6)；
It is devices under taking-up by described, checks test result.
7. the application method of drilling pressure environment simulator according to claim 6, which is characterized in that the capping apparatus
Include:
Gland (3), on the pit shaft (5), it is O-shaped that the gland (3) with the pit shaft (5) junction is provided with first for setting
It encloses (4)；
End cap (1), above the gland (3), the end cap (1) connect with the pit shaft (5) for setting.
8. the application method of drilling pressure environment simulator according to claim 6, it is characterised in that:
If described be devices under needs real time detection signal, signal transmission is carried out by the cable (13), passes through the electricity
Cable sealer (12) seals the cable (13), so that the pit shaft (5) interior high pressure gas does not leak, by the sealing
Plug (14) unloading；
If described be devices under is not required to real time detection signal, the seal plug (14) is tightened, to prevent stopping leak dew.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363736.4A CN106052964B (en) | 2016-05-27 | 2016-05-27 | A kind of drilling pressure environment simulator and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363736.4A CN106052964B (en) | 2016-05-27 | 2016-05-27 | A kind of drilling pressure environment simulator and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106052964A CN106052964A (en) | 2016-10-26 |
| CN106052964B true CN106052964B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610363736.4A Expired - Fee Related CN106052964B (en) | 2016-05-27 | 2016-05-27 | A kind of drilling pressure environment simulator and using method thereof |
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| Country | Link |
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| CN (1) | CN106052964B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109916616B (en) * | 2019-04-16 | 2019-10-08 | 吉林大学 | An experimental platform and method for testing a static pressure fishing device |
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|---|---|---|---|---|
| US5233866A (en) * | 1991-04-22 | 1993-08-10 | Gulf Research Institute | Apparatus and method for accurately measuring formation pressures |
| CN201574751U (en) * | 2009-09-28 | 2010-09-08 | 中国地质大学（武汉） | A test device for simulating coal seam drilling and grouting and evaluating the stability of the hole wall |
| CN102562040A (en) * | 2012-02-02 | 2012-07-11 | 西南石油大学 | Dynamic evaluation instrument for high-temperature and high-pressure drilling fluid loss |
| CN202442844U (en) * | 2012-02-14 | 2012-09-19 | 中国石油天然气股份有限公司 | Water-sensitive self-expansion sealing element test device |
| CN202451142U (en) * | 2011-10-26 | 2012-09-26 | 中国石油化工股份有限公司 | Subsurface environment simulator |
| CN203216681U (en) * | 2013-04-28 | 2013-09-25 | 成都锦江电子系统工程有限公司 | Pressurizing simulation water depth test apparatus for sealed water tank |
| CN105352670A (en) * | 2014-08-22 | 2016-02-24 | 中国石油化工股份有限公司 | Sealing evaluation system of cementing cement sheath of oil and gas well |
| CN105424544A (en) * | 2015-11-04 | 2016-03-23 | 安徽理工大学 | Device and method for measuring coal mass deformation through simultaneous adsorption and induction of gas and water |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0442759Y2 (en) * | 1987-02-13 | 1992-10-09 |
-
2016
- 2016-05-27 CN CN201610363736.4A patent/CN106052964B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233866A (en) * | 1991-04-22 | 1993-08-10 | Gulf Research Institute | Apparatus and method for accurately measuring formation pressures |
| CN201574751U (en) * | 2009-09-28 | 2010-09-08 | 中国地质大学（武汉） | A test device for simulating coal seam drilling and grouting and evaluating the stability of the hole wall |
| CN202451142U (en) * | 2011-10-26 | 2012-09-26 | 中国石油化工股份有限公司 | Subsurface environment simulator |
| CN102562040A (en) * | 2012-02-02 | 2012-07-11 | 西南石油大学 | Dynamic evaluation instrument for high-temperature and high-pressure drilling fluid loss |
| CN202442844U (en) * | 2012-02-14 | 2012-09-19 | 中国石油天然气股份有限公司 | Water-sensitive self-expansion sealing element test device |
| CN203216681U (en) * | 2013-04-28 | 2013-09-25 | 成都锦江电子系统工程有限公司 | Pressurizing simulation water depth test apparatus for sealed water tank |
| CN105352670A (en) * | 2014-08-22 | 2016-02-24 | 中国石油化工股份有限公司 | Sealing evaluation system of cementing cement sheath of oil and gas well |
| CN105424544A (en) * | 2015-11-04 | 2016-03-23 | 安徽理工大学 | Device and method for measuring coal mass deformation through simultaneous adsorption and induction of gas and water |
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| CN106052964A (en) | 2016-10-26 |
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