CN111335872A - Drilling fluid density sensor for petroleum engineering - Google Patents
Drilling fluid density sensor for petroleum engineering Download PDFInfo
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- CN111335872A CN111335872A CN202010199922.5A CN202010199922A CN111335872A CN 111335872 A CN111335872 A CN 111335872A CN 202010199922 A CN202010199922 A CN 202010199922A CN 111335872 A CN111335872 A CN 111335872A
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- 238000005553 drilling Methods 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 title claims abstract description 38
- 239000003208 petroleum Substances 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000000903 blocking effect Effects 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 description 11
- 239000002002 slurry Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000012466 permeate Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Chemical & Material Sciences (AREA)
- Fluid Mechanics (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Geophysics And Detection Of Objects (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a drilling fluid density sensor for petroleum engineering, and belongs to the field of petroleum engineering drilling. The utility model provides a drilling fluid density sensor for petroleum engineering, include from last explosion-proof case to fixed connection in proper order down, connecting rod and sensor detection head, explosion-proof incasement has set firmly central processing unit, sensor detection head and central processing unit electric connection, the sensor detection head outside is equipped with carries out the protection architecture who protects it, protection architecture includes the locating plate and connects in the guard plate of a plurality of evenly distributed of locating plate bottom, guard plate and central processing unit electric connection, the locating plate is located the outside of connecting rod bottom and fixes mutually with the connecting rod, can pass through the setting of protection architecture and anti-seepage structure, make the sensor detection head be difficult for adhering to mud at the in-process of drilling fluid down, be difficult for having more mud in the testing process to adhere to, play better guard action to sensor detection head, the service life and the measurement accuracy have been improved.
Description
Technical Field
The invention relates to the field of petroleum engineering drilling, in particular to a drilling fluid density sensor for petroleum engineering.
Background
In the drilling operation, the density of the drilling fluid is often required to be measured, the density of the drilling fluid is an important parameter of the drilling fluid for realizing balanced drilling and improving the drilling efficiency and also an important parameter for reflecting the drilling safety, and under the normal condition, the density of the drilling fluid pumped into the well and the density of the drilling fluid returned from the well are equal. When fluid is immersed, the density of the returned drilling fluid is reduced, and the density is increased when the drilling fluid is drilled into a slurried stratum or the water loss of the stratum is too large.
Under the general condition, including density sensor in drilling instrument or the logging instrument, this type of sensor is the contact type, the detection head that uses promptly needs and drilling fluid contact, because the drilling fluid characteristic is more complicated, it is high to have impurity content, characteristics such as viscidity is big, long-time back drilling fluid sand setting of using covers the sensor detection head, cause the measuring result mistake, or have the siltation to adhere to, need often clear up the diaphragm surface, otherwise can be very big influence measurement accuracy cause the measuring result inaccurate, often clear up the operation comparatively troublesome.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a drilling fluid density sensor for petroleum engineering, which can ensure that mud is not easily attached to a sensor detection head in the drilling fluid process and more mud is not easily attached in the detection process through the arrangement of a protection structure and an anti-leakage structure, so that the sensor detection head is well protected, and the service life and the measurement accuracy of the sensor detection head are improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A drilling fluid density sensor for petroleum engineering comprises an explosion-proof box, a connecting rod and a sensor detection head which are fixedly connected from top to bottom in sequence, wherein a central processing unit is fixedly arranged in the explosion-proof box, the sensor detection head is electrically connected with the central processing unit, a protection structure for protecting the sensor detection head is arranged on the outer side of the sensor detection head, the protection structure comprises a positioning plate and a plurality of uniformly distributed protection plates connected to the bottom end of the positioning plate, the protection plates are electrically connected with the central processing unit, the positioning plate is positioned on the outer side of the bottom of the connecting rod and fixed with the connecting rod, the sensor detection head is positioned on the inner sides of the plurality of protection plates, and an anti-leakage structure is connected between every;
in the process that the sensor detection head is inserted into the drilling fluid, the plurality of protection plates are inwards closed into a whole, so that the sensor detection head is protected from being influenced by liquid or mud cakes;
the sensor detection head arrives the check point, and a plurality of guard plates outwards open and shut certain angle simultaneously, and the antiseep structure is followed the guard plate and is prolonged the expansion, fills the gap after every two adjacent guard plates expand, and the sensor detection head detects this moment.
Can be through the setting of protection architecture and anti-seepage structure for the sensor detects the head and is difficult for adhering to mud at the in-process of drilling fluid down, is difficult for having more mud to adhere to in the testing process, plays better guard action to the sensor detects the head, has improved its life and measurement accuracy.
Further, the antiseep structure is including setting firmly the elasticity between every two adjacent guard plates and blocking the net and a plurality of setting firmly in the elasticity and blocking the in-process that the locating plate one end was kept away from to the net and pushing away a class piece, the one end that the elasticity separation net is close to the locating plate is fixed with the locating plate bottom, outwards expand gradually when the guard plate, gap grow between every two adjacent guard plates, when sensor detection head gets into the slurrying stratum and examines, under the effect of blockking of elasticity separation net, the inboard that is difficult for having too much impurity to get into a plurality of guard plates causes the influence to the detection of sensor detection head, the setting of pushing away class piece makes when the guard plate expandes, the mud that exists in the drilling fluid is difficult for causing great resistance to the elasticity separation net, can promote mud and remove under the effect of pushing away class piece.
Furthermore, the hardness of one end, far away from the protection plate, of the elastic blocking net is greater than that of the other outer side end of the elastic blocking net, so that when the protection plate is unfolded outwards, one side, far away from the protection plate, of the elastic blocking net moves along with the protection plate, the resistance of partial mud can be resisted, and the protection plate is not easily blocked by the mud and is damaged to some extent.
Further, the plug flow piece is including falling the U-shaped board and setting firmly in the V-shaped board of falling the U-shaped board bottom, the one end that the locating plate was kept away from to the top and elasticity separation net is fixed mutually in the U-shaped board that falls, and when a plurality of guard plates outwards expanded or inside closed in-process, the plug flow piece was followed the guard plate and is removed, and the special shape of V-shaped board sets up the promotion mud that makes it can be smooth and easy.
Furthermore, the included angle of the inner side of the V-shaped plate is an acute angle, and the included angle is 30-45 degrees, so that the V-shaped plate can better push slurry when moving along with the protection plate.
Further, a plurality of under the guard plate closed state as an organic whole, every adjacent two push away the class spare and contact each other for when a plurality of guard plates were closed, a plurality of push away class spare are difficult for piling together, because of when the guard plate just expanded, the push away class spare of piling up is difficult to follow the guard plate and promotes mud together.
Further, the horizontal plane position at guard plate bottom place is less than the horizontal plane position at sensor detection head bottom place for when a plurality of guard plates are closed together, can not cause the harm to sensor detection head, when a plurality of guard plates outwards expand and promote the mud that probably exists, the guard plate promotes the in-process, and the sensor detects the head and has certain distance apart from the central point when a plurality of guard plates close, and the sensor detects the influence that first bottom is difficult to receive mud after expanding.
Furthermore, the outward-unfolded included angle range of the protection plates does not exceed 45 degrees, and when the inward closing and the original position recovery are easily caused due to the overlarge unfolding range of the protection plates, a part of slurry is carried to flow back.
Furthermore, the protection plate is of an arc structure, the radian is 45-60 degrees, and when the protection plate is small in radian, mud is pushed outwards to be far away from the sensor detection head more easily.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme can be through the setting of protection architecture and anti-seepage structure for the sensor detects the head and is difficult for adhering to mud at the in-process of drilling fluid down, is difficult for having more mud to adhere to in the testing process, plays better guard action to the sensor detects the head, has improved its life and measurement accuracy.
(2) Antiseep structure is including setting firmly the elasticity between every two adjacent guard plates and blocking the net and a plurality of setting firmly in the elasticity and blocking the net and keep away from the plug flow piece of locating plate one end, the one end that the elasticity separation net is close to the locating plate is fixed with the locating plate bottom, in-process that the guard plate outwards expandes gradually, gap grow between every two adjacent guard plates, when sensor detection head gets into the slurrification stratum and detects, under the effect of blocking of elasticity separation net, the inboard that is difficult for having too much impurity to get into a plurality of guard plates causes the influence to the detection of sensor detection head, plug flow piece's setting makes when the guard plate expandes, the mud that exists in the drilling fluid is difficult for causing great resistance to the elasticity separation net, can promote mud and remove under plug flow piece's effect.
(3) The hardness that the one end of protection plate was kept away from to elasticity separation net is greater than the hardness of the remaining outside end of elasticity separation net for the in-process that the protection plate outwards expanded, when one side that the protection plate was kept away from to elasticity separation net was followed and is removed, can resist the resistance of partial mud, and difficult quilt mud separates and damage to some extent.
(4) The plug-flow piece includes the shape of falling the U-shaped plate and sets firmly the V-shaped plate in the shape of falling the U-shaped plate bottom, and the one end of locating plate is kept away from with the elasticity separation net in the shape of falling the U-shaped plate top is fixed mutually, and when a plurality of guard plates outwards expanded or inside closed in-process, the plug-flow piece was followed the guard plate and is removed, and the special shape of V-shaped plate sets up the promotion mud that makes it can be smooth and easy.
(5) The included angle of the inner side of the V-shaped plate is an acute angle and is 30-45 degrees, so that the V-shaped plate can better push slurry when moving along with the protection plate.
(6) Under a plurality of guard plates closed state as an organic whole, every two adjacent plug flow spare contact each other for when a plurality of guard plates were closed, a plurality of plug flow spare were difficult for piling together, because of when the guard plate just expanded, the difficult guard plate that follows of the plug flow spare that piles promoted mud together.
(7) The horizontal plane position at guard plate bottom place is less than the horizontal plane position at sensor detection head bottom place for when a plurality of guard plates are closed together, can not cause the harm to sensor detection head, when a plurality of guard plates outwards expand and promote the mud that probably exists, the guard plate promotes the in-process, and sensor detection head has certain distance apart from the central point when a plurality of guard plates are closed, and sensor detection head bottom is difficult for receiving the influence of mud after expanding.
(8) The outward-unfolded included angle range of the protection plates does not exceed 45 degrees, and when the inward closing and the original position recovery are easily caused due to the overlarge unfolding range of the protection plates, a part of slurry is carried to flow back.
(9) The protection plate is of an arc structure, the radian is 45-60 degrees, and when the protection plate is small in radian, mud is pushed outwards to be away from the sensor detection head more easily.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic front view of the protection structure of the present invention when it is extended outward to a certain angle;
FIG. 3 is a schematic perspective view of the protection structure of the present invention when it is extended outward by a certain angle;
FIG. 4 is a schematic bottom perspective view of the protective structure of the present invention when closed;
FIG. 5 is a schematic top view of the protective structure of the present invention;
FIG. 6 is a schematic top view of the protective structure and leakage prevention structure portions of the present invention;
fig. 7 is a perspective view of the deflector portion of the present invention.
The reference numbers in the figures illustrate:
the device comprises an explosion-proof box 1, a central processing unit 2, a connecting rod 3, a positioning plate 4, a protection plate 5, a sensor detection head 6, an elastic blocking net 7, a flow pushing piece 8, an inverted U-shaped plate 81 and a V-shaped plate 82.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
please refer to fig. 1-7 for a drilling fluid density sensor for petroleum engineering, it includes explosion-proof box 1, connecting rod 3 and sensor detection head 6 from last to lower fixed connection in proper order, explosion-proof box 1 sets firmly central processing unit 2, sensor detection head 6 and central processing unit 2 electric connection, the sensor detection head 6 outside is equipped with the protection architecture who carries out the protection to it, protection architecture includes locating plate 4 and connects in a plurality of evenly distributed's of 4 bottom of locating plate guard plate 5, guard plate 5 and central processing unit 2 electric connection, locating plate 4 is located the outside of connecting rod 3 bottom and is fixed mutually with connecting rod 3, sensor detection head 6 is located a plurality of guard plate 5 inboards.
Under a plurality of guard plates 5 are closed as an organic whole state, every two adjacent plug flow 8 contact each other for when a plurality of guard plates 5 are closed, a plurality of plug flow 8 are difficult for piling together, because of when guard plate 5 just expandes, the difficult mud that promotes along with guard plate 5 of following of plug flow 8 that piles.
The horizontal plane position at 5 bottom of guard plate is less than the horizontal plane position at 6 bottom of sensor detection head for when a plurality of guard plates 5 are closed together, can not cause the harm to sensor detection head 6, when a plurality of guard plates 5 outwards expand and promote the mud that probably exists, guard plate 5 promotes the in-process, the sensor detects the first 6 central point when closing apart from a plurality of guard plates of distance and has certain distance, the sensor detects the influence that 6 bottoms of head are difficult for receiving mud after expanding.
The outward expansion included angle range of the protection plates 5 is not more than 45 degrees, and when the inward closing and the recovery are easily caused due to the overlarge expansion range of the protection plates 5, part of slurry is carried to flow back.
An anti-seepage structure is connected between every two adjacent protection plates 5, the anti-seepage structure comprises an elastic barrier net 7 fixedly arranged between every two adjacent protection plates 5 and a plurality of flow pushing pieces 8 fixedly arranged at one end of the elastic barrier net 7 far away from the positioning plate 4, one end of the elastic barrier net 7 close to the positioning plate 4 is fixed with the bottom end of the positioning plate 4, when the protection plates 5 are gradually unfolded outwards, the gap between every two adjacent protection plates 5 is enlarged, when the detection head 6 of the sensor enters a slurry formation layer for detection, under the blocking action of the elastic blocking net 7, excessive impurities are not easy to enter the inner sides of the plurality of protection plates 5 to influence the detection of the sensor detection head 6, when the protection plates 5 are unfolded due to the arrangement of the flow pushing piece 8, mud existing in the drilling fluid is not easy to cause large resistance to the elastic blocking net 7, and the mud can be pushed to move under the action of the flow pushing piece 8.
The hardness of the end, far away from the protection plate 5, of the elastic blocking net 7 is greater than that of the rest outer side end of the elastic blocking net 7, so that when the protection plate 5 is unfolded outwards and one side, far away from the protection plate 5, of the elastic blocking net 7 moves along, the resistance of partial mud can be resisted, and the protection plate is not easily blocked by the mud and is damaged to some extent.
Flow pushing element 8 includes the board 81 of falling the U-shaped and sets firmly the V-shaped board 82 in the board 81 bottom of falling the U-shaped, the top is fixed mutually with the one end that locating plate 4 was kept away from to elasticity barrier net 7 in the board 81 of falling the U-shaped, when a plurality of guard plates 5 outwards expand or inside closed in-process, flow pushing element 8 follows guard plate 5 and removes, V-shaped board 82's special shape sets up the promotion mud that makes it can be smooth and easy, the inboard contained angle of V-shaped board 82 is the acute angle, and the contained angle is 30, the promotion mud that can be better when making V-shaped board 82 follow guard plate 5 and remove.
In the process that the sensor detection head 6 is inserted into the drilling fluid, the protection plates 5 are closed inwards to form a whole, the sensor detection head 6 is tightly surrounded, and the sensor detection head 6 is protected from being influenced by liquid or mud cakes.
The sensor detection head 6 reaches a detection point, the central processing unit 2 controls the protection plates 5 to be started, the protection plates 5 are opened and closed outwards at a certain angle at the same time, the anti-leakage structure is expanded along with the protection plates 5, gaps formed after every two adjacent protection plates 5 are expanded are filled, namely the elastic barrier net 7 is expanded along with the protection plates 5, the elastic barrier net 7 is in an elastic stretching state at the moment, the flow pushing piece 8 moves along with the protection plates 5 to push liquid or mud cakes, large granular substances such as mud cakes and the like are not easy to permeate from the gaps between the protection plates 5, mud cakes or mud and the like possibly existing on the side surfaces of the sensor detection head 6 are pushed away by the protection plates 5, the bottom of the sensor detection head is not easy to permeate right mud, the sensor detection head 6 can detect at the moment, and the sensor detection head is not easy to adhere to mud in the process of drilling, more slurry is not easy to adhere in the detection process, the sensor detection head is well protected, and the service life and the measurement accuracy are improved.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a drilling fluid density sensor for oil engineering, includes from last explosion-proof case (1), connecting rod (3) and the sensor detection head (6) to lower fixed connection in proper order, explosion-proof case (1) internal setting has central processing unit (2), sensor detection head (6) and central processing unit (2) electric connection, its characterized in that: the sensor protection device is characterized in that a protection structure for protecting the sensor detection head (6) is arranged on the outer side of the sensor detection head, the protection structure comprises a positioning plate (4) and a plurality of uniformly distributed protection plates (5) connected to the bottom end of the positioning plate (4), the protection plates (5) are electrically connected with the central processing unit (2), the positioning plate (4) is positioned on the outer side of the bottom of the connecting rod (3) and fixed with the connecting rod (3), the sensor detection head (6) is positioned on the inner side of the plurality of protection plates (5), and an anti-leakage structure is connected between every two adjacent protection plates (5);
in the process that the sensor detection head (6) is inserted into the drilling fluid, the plurality of protection plates (5) are inwards closed into a whole, so that the sensor detection head (6) is protected from being influenced by liquid or mud cakes;
the sensor detection head (6) reaches a detection point, the protection plates (5) are opened and closed outwards at a certain angle at the same time, the anti-leakage structure extends and expands along with the protection plates (5), gaps formed after every two adjacent protection plates (5) are expanded are filled, and the sensor detection head (6) detects at the moment.
2. The drilling fluid density sensor for petroleum engineering according to claim 1, wherein: the anti-leakage structure comprises an elastic barrier net (7) fixedly arranged between every two adjacent protection plates (5) and a plurality of flow pushing pieces (8) fixedly arranged at one ends, far away from the positioning plate (4), of the elastic barrier nets (7), wherein one ends, close to the positioning plate (4), of the elastic barrier nets (7) are fixed to the bottom end of the positioning plate (4).
3. The drilling fluid density sensor for petroleum engineering according to claim 2, wherein: the hardness of one end of the elastic barrier net (7) far away from the protection plate (5) is greater than that of the other outer side end of the elastic barrier net (7).
4. The drilling fluid density sensor for petroleum engineering according to claim 2, wherein: the plug flow piece (8) comprises an inverted U-shaped plate (81) and a V-shaped plate (82) fixedly arranged at the bottom end of the inverted U-shaped plate (81), and the inner top end of the inverted U-shaped plate (81) is fixed with one end, far away from the positioning plate (4), of the elastic blocking net (7).
5. The drilling fluid density sensor for petroleum engineering according to claim 4, wherein: the included angle of the inner side of the V-shaped plate (82) is an acute angle and is 30-45 degrees.
6. The drilling fluid density sensor for petroleum engineering according to claim 2, wherein: and under the condition that the protection plates (5) are closed into a whole, every two adjacent flow pushing pieces (8) are in mutual contact.
7. The drilling fluid density sensor for petroleum engineering according to claim 1, wherein: the horizontal plane position of the bottom end of the protection plate (5) is lower than the horizontal plane position of the bottom end of the sensor detection head (6).
8. The drilling fluid density sensor for petroleum engineering according to claim 1, wherein: the outward-unfolded included angle range of the protection plates (5) is not more than 45 degrees.
9. The drilling fluid density sensor for petroleum engineering according to claim 1, wherein: the protection plate (5) is of an arc-shaped structure, and the radian is 45-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199922.5A CN111335872B (en) | 2020-03-20 | 2020-03-20 | Drilling fluid density sensor for petroleum engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199922.5A CN111335872B (en) | 2020-03-20 | 2020-03-20 | Drilling fluid density sensor for petroleum engineering |
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| CN111335872A true CN111335872A (en) | 2020-06-26 |
| CN111335872B CN111335872B (en) | 2023-06-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113123726A (en) * | 2021-04-23 | 2021-07-16 | 云南滇东雨汪能源有限公司 | Coal mine water permeation detection protection device for coal mine safety |
| CN116067421A (en) * | 2022-11-18 | 2023-05-05 | 中国石油天然气集团有限公司 | Measuring device and measuring method for multi-point multifunctional detection of drilling fluid |
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| CN111335872B (en) | 2023-06-09 |
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