CN104453855B - Measurement while drilling key-separation instrument - Google Patents
Measurement while drilling key-separation instrument Download PDFInfo
- Publication number
- CN104453855B CN104453855B CN201410627865.0A CN201410627865A CN104453855B CN 104453855 B CN104453855 B CN 104453855B CN 201410627865 A CN201410627865 A CN 201410627865A CN 104453855 B CN104453855 B CN 104453855B
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- Prior art keywords
- piston rod
- spring
- measurement
- drilling
- sealing ring
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- 238000005553 drilling Methods 0.000 title claims abstract description 60
- 238000000926 separation method Methods 0.000 title claims abstract description 45
- 238000005259 measurement Methods 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims description 51
- 229910000792 Monel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration 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
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of measurement while drilling key-separation instrument, including the fishing head positioned at top, the fishing head lower end is connected by shear pin with retainer ring, the retainer ring also covers the top of connective pole, the bottom of the connecting rod is fixedly connected with spring strut, and the spring strut also with the movable connection of piston rod, is provided with spring in the spring strut, one end of spring is connected to spring strut top inner wall, and the spring other end abuts piston rod part；The bottom of the piston rod is also threadedly coupled with orifice plate, and the orifice plate is used to be connected with measurement while drilling instrument.Implement the present invention, can effectively avoid de- key, be worked continuously so as to realize, reduce trip-out number；Due to the problem of avoiding de- key, the number that midway pours into mud can be reduced, running speed is improved, shortens drilling period, so as to save drilling cost.
Description
Technical field
The present invention relates to drilling technique, more specifically to a kind of measurement while drilling key-separation instrument.
Background technology
Measurement while drilling (Measurement While Drilling) abbreviation MWD, is a kind of advanced skill in directional drilling
Art means, uninterruptedly Directional Drilling and then the information near the drilling tool can be measured, and information is sent to the mistake of earth's surface at once
Journey.With advances in technology, modern measurement while drilling has developed into well logging (Logging Whi le Drilling), referred to as
LWD, directional drilling can be not only monitored, comprehensive logging can also be carried out.
In general, MWD tool part are contained in non magnetic drill collar, using it is lower seat keyed installed, with realize distance of zero mark compared with
It is short and can salvage.The upper end of non magnetic drill collar is connected with drilling rod, and lower end is connected with power drilling tool, the MWD tool during probing
Part measures various data, and feeds back to ground.It is but drill-through fast when either horizontal segment hole deviation is larger under, it is easy to cause
Instrument takes off key；If reducing the generation of de- key, would have to be connect kelly bar repeatedly and pour into mud, control running speed,
So as to have impact on operating efficiency.
The content of the invention
It is an object of the present invention to in existing drilling technique, if under when carrying out measurement while drilling it is drill-through it is fast either
When horizontal segment hole deviation is larger, it is easy to the problem of causing instrument to take off key, there is provided a kind of measurement while drilling key-separation instrument, on overcoming
State problem.
The scheme that the present invention solves the above problems is to provide a kind of measurement while drilling key-separation instrument, including positioned at top
Fishing head, the fishing head lower end are connected by shear pin with retainer ring, and the retainer ring also covers the top of connective pole, described
The bottom of connecting rod is fixedly connected with spring strut, and the measurement while drilling key-separation instrument also includes piston rod, the piston rod top
Portion is plugged on the lower end of the spring strut movable vertically, and spring is provided with the spring strut, and one end of spring is supported
Spring strut top inner wall is connected on, the spring other end abuts piston rod part；The bottom of the piston rod also connects with orifice plate screw thread
Connect, the orifice plate is used to be connected with measurement while drilling instrument.
The junction of the measurement while drilling key-separation instrument of the present invention, the retainer ring and connecting rod is provided with the first sealing ring,
The first sealing ring is located on the connecting rod lateral wall, and first sealing ring is brought into close contact the connecting rod and the fixation
Ring madial wall.
The junction of the measurement while drilling key-separation instrument of the present invention, the piston rod and the spring strut is provided with multiple close
Seal, the sealing ring are located on piston rod lateral wall, and the sealing ring is brought into close contact the piston rod and the spring strut
Madial wall.
The measurement while drilling key-separation instrument of the present invention, the sealing ring include being located at two phases close to the spring one end
Mutual spaced second sealing ring；The sealing ring also includes the 3rd sealing ring close to the spring strut lower end.
The measurement while drilling key-separation instrument of the present invention, the junction of the piston rod and orifice plate are provided with the 4th sealing
Circle, it is described 4th sealing ring is located on the piston rod lateral wall, the 4th sealing ring be brought into close contact the piston rod and
The orifice plate madial wall.
The measurement while drilling key-separation instrument of the present invention, on the piston rod and/or the spring medial wall of the tube, it is provided with use
In the limited step for limiting the piston rod shift position.
The measurement while drilling key-separation instrument of the present invention, the fishing head include superposed conical head, the conical head
Fishing head orifice plate is connected by fishing neck, the inner side of the retainer ring is socketed the fishing head orifice plate, and the shear pin is from institute
State after passing through retainer ring on the outside of retainer ring, be linked into the fishing head orifice plate.
The present invention measurement while drilling key-separation instrument, fishing head, retainer ring, connecting rod, spring strut, piston rod, orifice plate by
Monel steel is made.
Implement the measurement while drilling key-separation instrument of the present invention, can effectively avoid de- key, so as to realize Continuous maching, from reducing
Trip-out number；Due to the problem of avoiding de- key, the number that midway pours into mud can be reduced, running speed is improved, shortens and bore
The well cycle, so as to save drilling cost.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention will be described, wherein：
Fig. 1 is the structural representation of measurement while drilling key-separation instrument of the present invention；
The cross-sectional view of fishing head in the measurement while drilling key-separation instrument that Fig. 2 is Fig. 1；
Fig. 3 is the structural representation of Fig. 1 measurement while drilling key-separation instrument middle and lower part；
The diagrammatic cross-section of fishing head in the measurement while drilling key-separation instrument that Fig. 4 is Fig. 1；
The diagrammatic cross-section of connecting rod in the measurement while drilling key-separation instrument that Fig. 5 is Fig. 1；
The diagrammatic cross-section of spring strut in the measurement while drilling key-separation instrument that Fig. 6 is Fig. 1；
The diagrammatic cross-section of piston rod in the measurement while drilling key-separation instrument that Fig. 7 is Fig. 1；
The diagrammatic cross-section of orifice plate in the measurement while drilling key-separation instrument that Fig. 8 is Fig. 1.
Embodiment
The present invention for existing MWD tool under it is drill-through it is fast either horizontal segment hole deviation is larger when, it is easy to cause instrument
Device takes off the problem of key, there is provided a kind of running speed that need not can be controlled can just reduce the MWD key-separation instruments of de- key.This
Invention ensures that piston rod will not fall off, ensures the effect of key-separation by processing limited step on the piston rod；Built-in bullet simultaneously
Spring so that piston rod can be movable within the specific limits, without sized, especially adapts to various drilling rates and horizontal segment
Probing when hole deviation is larger.
In order to which preferably the present invention will be described, parsed below in conjunction with the drawings and specific embodiments.
As shown in figure 1, the half sectional view of the measurement while drilling key-separation instrument for the present invention.In the measurement while drilling shown in Fig. 1
In key-separation instrument, including the fishing head 100 of upper end and the retainer ring 300 that is connected with fishing head 100 by shear pin, beat
Dragging for first 100 lower section, circumferentially fishing head orifice plate is extended in outside, and shear pin points to the mode of central axis from outside, will beaten
Head bore plate is dragged for link into an integrated entity with retainer ring 300.In the lower section of retainer ring 300, axially extend one and be used for and connecting rod 500
The sleeve of installation is attached, sleeve is socketed in the upper end of connecting rod 500.In order to ensure that the sealing property of connection is preferable, prevent
Mud is poured into during probing, on the inwall of the sleeve of the retainer ring 300 or respective link 500 and sleeve connection it is outer
First sealing ring 401 is set on week, and first sealing ring 401 is close to the interior of the outside of connecting rod 500 and the sleeve of retainer ring 300 simultaneously
Wall, so as to realize sealing.
Connecting rod 500 is the cylindrical rod of a hard, and its lower end is fixedly connected with the upper end of spring strut 600.In spring with 600
One spring 700 is inside installed, the upper end of spring 700 is connected to the upper end of spring strut 600, and the lower end of spring 700 is connected to work
The upper end of stopper rod 900.The lower end of piston rod 900 is then threadedly coupled with orifice plate 800.
In order to ensure that whole measurement while drilling key-separation instrument can keep good airtight performance when work, in work
Multiple positions on stopper rod 900 set sealing ring.Such as on piston rod 900, two circles the are set on one end of spring 700
Two sealing rings 402, the second sealing ring 402 are close to the lateral wall of piston rod 900 and the madial wall of spring strut 600 simultaneously；In work
Stopper rod 900 sets the 3rd sealing ring 403, the 3rd sealing ring 403 is close to the outer of piston rod 900 simultaneously close to the lower end of spring strut 600
The madial wall of side wall and spring strut 600；In the junction of orifice plate 800 and piston rod 900, the 4th sealing ring is additionally provided with
404, the 4th sealing ring 404 ensure that the sealing property of piston rod 900 and orifice plate 800.
When the key-separation instrument of use above structure, first key-separation instrument is put into non magnetic drill collar so that fixed
Drilling tool work end of thread face is withstood in the end face of ring 300, and orifice plate 800 withstands the upper end of measurement while drilling instrument, due to built-in spring 700,
Piston rod can within the specific limits activity without adjust MWD tool size, can also reduce what penetration rate was brought in addition
Influence；And in order to ensure that piston rod 900 will not fall off, while ensure that spring 700 will not be processed by erosion on piston rod 900
Limited location step, strengthen the effect of key-separation.
In order to better illustrate in Fig. 1, the structure and function of each part, each part will be carried out specifically below
It is bright.
Fig. 2 discloses how fishing head 100 is attached with retainer ring 300.As shown in Fig. 2 the fishing head of fishing head 100
Orifice plate includes 4 connection pages, and the internal diameter of retainer ring 300 is adapted with the size of this 4 connection pages, the inner side of retainer ring 300 with
This 4 connection page fittings, then by 4 shear pins 200, are penetrated into connection page, realization is beaten from the outside of retainer ring 300
First 100 are dragged for link into an integrated entity with retainer ring 300.When needing to salvage, then calculated according to the number of shear pin 200
Shear force, it is applied from above carrying shearing tonnage so that all shear pins 200 are interrupted, fishing head 100 and retainer ring 300
Separation, and then key-separation instrument can be played out, carry out MWD salvaging.Specifically, when being salvaged, it is desirable to calculate
Contained, then the fisher of tripping in U-shaped, and 0.1 to 0.2 ton of lower section so that fishing head enters U-shaped fisher；Then mountain
Body shearing tonnage cuts pin so that fishing head separates with retainer ring, initial key-separation instrument.
As Fig. 3 gives the enlarged diagram of the substructure of measurement while drilling key-separation instrument.Spring strut 600 is one outer
Shape is shaft-like, the internal part with cavity, is placed with a spring 700 in the cavity.The general spring 700 is in uncompressed
Or slightly compressed state, one end of spring 700 abut the roof of spring strut 600, lower end mutually abuts with piston rod 900, made
Piston rod 900 can axially adjustment position, realize that the key-separation instrument need not adjust the size of MWD tool.In addition,
Limited step is set on the lateral wall of piston rod 900 or on the lower contact inwall of spring strut.The effect of limited step is so that living
Stopper rod 900 can move in the position range of restriction, prevent piston rod 900 from being come off from spring strut 600；In addition this is spacing
Step also enhances the sealing property between piston rod 900 and spring strut 600, ensures that spring 700 will not be by erosion.
In fig. 3 it can be seen that multiple positions on piston rod 900 are provided with sealing ring, to ensure in spring strut 600
Good sealing effect.Such as two sealing ring mounting grooves being spaced are offered close to one end of spring 600 on piston rod 900,
After two the second sealing rings 402 are placed in the sealing ring mounting groove, then it is close to the madial wall of spring strut 600.Certainly, seal
The setting of circle mounting groove is not limited on piston rod 900, can also be arranged on the upper and lower ends of limited step, such as the 5th close
Seal 405, the 3rd sealing ring 403 etc..Those skilled in the art is it should be appreciated that the specific setting quantity of sealing ring and position
It is that can flexibly be set according to the drilling situation of reality to put, and it is only a kind of feasible mode that the sealing ring in Fig. 3, which is set, and
It is not unique scheme.
As shown in figure 4, give the sectional view of fishing head 100.Fishing head 100 can need carry out fishing when
Wait, realization separates with the instrument of lower section, avoids directly salvaging instrument generation damage.The upper end of fishing head 100 is a conical head
101, the setting of conical head 101 is to pass through tamper, the fishing neck that conical head 101 passes through elongated shape when salvaging for convenience
102 connection fishing head orifice plates 103.The pin hole for pointing to axis direction is provided with fishing head orifice plate 103, shear pin is through admittedly
After determining ring, it is linked into pin hole, realizes the connection of fishing head 100 and lower section all parts；And when needing to salvage, pass through
Tonnage is above carried, shear pin is cut, and fishing head 100 separates with all parts of lower section, and instrument is directly salvaged so as to avoid
Caused damage problem.
The structural representation of connecting rod 500 is given as shown in Figure 5.The middle part of connecting rod 500 is smooth cylindrical rigid posts, two
Head is provided with connecting portion 501, and connecting portion 501 can be screw thread, projection block etc., with threaded connection of the realization with miscellaneous part, card
Embedding connection even interference fit etc., as long as connecting rod 500 stably can link into an integrated entity with miscellaneous part.
The structural representation on spring strut 600 is given as shown in Figure 6.The setting of spring strut 600 is primarily to carry
Placed for suitable space to spring 700.The upper end of spring strut 600 is connected with connecting rod 500；Middle part is cavity 601, for placing
Spring 700；Lower end is socketed piston rod 900 by lower contact so that the upper end of piston rod 900 abuts with spring 700, and piston
Bar 900 can carry out a range of movement in the lower end position of spring strut 600.In the present invention, spring strut 600 and bullet
Spring 700 cooperates, and can realize the about 70mm of piston rod 900 moving range.
As shown in fig. 7, the diagrammatic cross-section for piston rod 900.Piston rod 900 is hard stock, its upper end and spring 700
Abut.On the outside of piston rod 900, two are offered around piston rod 900 (i.e. close to one end of spring 700) close to upper end
The sealing ring mounting groove 901 in outside, and the two 901 spaced certain distances of sealing ring mounting groove.Sealing ring mounting groove
901 are used to place sealing ring so that sealing ring will not can produce during piston rod 900 moves relative to piston rod 900
Raw displacement.And on the other end of piston rod 900, then screw thread 902 is provided with, the screw thread 902 is used to carry out spiral shell with orifice plate 800
Line connects.After piston rod 900 and orifice plate 800 are fixedly connected, piston rod 900 can drive orifice plate 800 together
It is relative to carry out displacement with spring strut 600.
And bottom part of the orifice plate 800 as whole key-separation instrument, its structure are as shown in Figure 8.Orifice plate 800 wraps
Include two parts：Female link joint feature 801 and the MWD connecting portions being fixedly connected with link joint feature 801 are set
802.Link joint feature 801 is by the screw thread realization of inside and being fixedly connected for connecting rod 900, and MWD connecting portions 802 are then withstood
The upper end of MWD instruments, realize the connection with MWD instruments.
In all parts more than, fishing head 100, retainer ring 300, connecting rod 500, spring strut 600, piston rod 900, under
Orifice plate 800 is made of Monel steel, can reduce magnetic interference, ensures the precision of MWD instruments.
When being carried out according to above-mentioned part with MWD instrument cooperatings, by processing limited step, ensure piston rod not
It can come off, ensure the effect of key-separation；Built-in spring simultaneously so that piston rod can be movable within the specific limits, without regulation
Size, especially adapt to various drilling rate and horizontal segment hole deviations it is larger when probing.Due to avoiding de- key, thus probing can
To be carried out continuously, reduction makes a trip.Assuming that a bite horizontal well will cause the trip-out of more than 3 times, and adopt substantially according to original technology
After technology with the present invention, the numeral can be significantly reduced, every mouthful of well can about reduce by 6 to 100,000 yuan of economic damage
Lose.And conventional the problem of needing to control running speed is avoided, improve running speed of knowing clearly and shorten drilling period, every mouthful of well can
0.5 day drilling period is saved, saves 40,000 yuan of cost.
It these are only the specific embodiment of the invention, it is impossible to the scope of the present invention is limited with this, in the art
The equivalent change that those skilled in the art are made according to this creation, and change known to those skilled in that art, all should still it belong to
The scope that the present invention covers.
Claims (6)
1. a kind of measurement while drilling key-separation instrument, it is characterised in that including the fishing head (100) positioned at top, the fishing head
(100) lower end is connected by shear pin (200) with retainer ring (300), and the retainer ring (300) also covers connective pole (500)
Top, the bottom of the connecting rod (500) are fixedly connected with spring strut (600), and the measurement while drilling key-separation instrument also includes living
Stopper rod (900), piston rod (900) top is plugged on the lower end of the spring strut (600) movable vertically, described
Spring (700) is installed, one end of the spring (700) is connected in the spring strut (600) top in spring strut (600)
Wall, the other end of the spring (600) are abutted at the top of piston rod (900)；The bottom of the piston rod (900) also with orifice plate
(800) it is threadedly coupled, the orifice plate (800) is used to be connected with measurement while drilling instrument；
On the outside of the piston rod (900) and/or on the spring strut (600) madial wall, it is provided with for limiting the piston rod
(900) limited step of shift position；The fishing head includes superposed conical head (101), and the conical head (101) is logical
Fishing neck (102) connection fishing head orifice plate (103) is crossed, the inner side of the retainer ring (300) is socketed the fishing head orifice plate
(103) after, the shear pin (200) passes through retainer ring (300) on the outside of the retainer ring (300), it is linked into the salvaging
In head bore plate (103).
2. measurement while drilling key-separation instrument according to claim 1, it is characterised in that the retainer ring (300) and connecting rod
(500) junction is provided with the first sealing ring (401), and the first sealing ring (401) ring is located on the outside of the connecting rod (500)
On wall, first sealing ring (401) is brought into close contact the connecting rod (500) and the retainer ring (300) madial wall.
3. measurement while drilling key-separation instrument according to claim 1, it is characterised in that the piston rod (900) with it is described
The junction of spring strut (600) is provided with multiple sealing rings, and the sealing ring is located on the piston rod (900) lateral wall,
The sealing ring is brought into close contact the piston rod (900) and the spring strut (600) madial wall.
4. measurement while drilling key-separation instrument according to claim 3, it is characterised in that the sealing ring is included positioned at close
The second sealing ring (402) of two spaced settings of described spring (700) one end；The sealing ring is also included close to described
3rd sealing ring (403) of spring strut (600) lower end.
5. measurement while drilling key-separation instrument according to claim 1, it is characterised in that the piston rod (900) and lower opening
The junction of plate (800) is provided with the 4th sealing ring (404), and the 4th sealing ring (404) ring is located at the piston rod (900)
On lateral wall, the 4th sealing ring (404) is brought into close contact the piston rod (900) and the orifice plate (800) madial wall.
6. measurement while drilling key-separation instrument according to claim 1, it is characterised in that the fishing head (100), retainer ring
(300), connecting rod (500), spring strut (600), piston rod (900) and orifice plate (800) are made up of Monel steel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410627865.0A CN104453855B (en) | 2014-11-10 | 2014-11-10 | Measurement while drilling key-separation instrument |
| PCT/CN2015/080589 WO2016074471A1 (en) | 2014-11-10 | 2015-06-02 | Measurement while drilling bond detachment protection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410627865.0A CN104453855B (en) | 2014-11-10 | 2014-11-10 | Measurement while drilling key-separation instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104453855A CN104453855A (en) | 2015-03-25 |
| CN104453855B true CN104453855B (en) | 2017-11-10 |
Family
ID=52900528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410627865.0A Active CN104453855B (en) | 2014-11-10 | 2014-11-10 | Measurement while drilling key-separation instrument |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104453855B (en) |
| WO (1) | WO2016074471A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453855B (en) * | 2014-11-10 | 2017-11-10 | 深圳市百勤石油技术有限公司 | Measurement while drilling key-separation instrument |
| CN114059951B (en) * | 2020-07-31 | 2024-04-26 | 中国石油化工股份有限公司 | Fishing type falling-preventing device and falling-preventing device using same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2690596Y (en) * | 2004-04-16 | 2005-04-06 | 辽河石油勘探局 | Anti-key dropping tool of radio inclino meter while drilling |
| CN201810302U (en) * | 2010-10-21 | 2011-04-27 | 中国石油集团西部钻探工程有限公司 | Anti-loosening device for anti-loosening circulating sleeve of wireless directional tool |
| CN201874556U (en) * | 2010-12-02 | 2011-06-22 | 安东石油技术（集团）有限公司 | Key release prevention structure for key-sitting type measurement-while-drilling instrument |
| CN202391409U (en) * | 2011-12-22 | 2012-08-22 | 上海神开石油化工装备股份有限公司 | Anti-off tool of instrument while drilling |
| US9187997B2 (en) * | 2012-02-13 | 2015-11-17 | General Downhole Technologies, Ltd. | System, method and apparatus for reducing shock and vibration in down hole tools |
| CN203022730U (en) * | 2013-01-05 | 2013-06-26 | 山东陆海威尔德石油科技有限公司 | Key separation prevention structure of wireless inclinometer while drilling |
| CN203499672U (en) * | 2013-06-05 | 2014-03-26 | 中国石油化工股份有限公司 | Adjustable type key-escaping prevention ejector rod |
| CN103343682A (en) * | 2013-07-31 | 2013-10-09 | 上海神开石油化工装备股份有限公司 | Anti-drop structure and anti-drop method for wireless inclinometer |
| CN104033144A (en) * | 2014-06-23 | 2014-09-10 | 北京奥瑞安能源技术开发有限公司 | Lifting head device |
| CN104453855B (en) * | 2014-11-10 | 2017-11-10 | 深圳市百勤石油技术有限公司 | Measurement while drilling key-separation instrument |
-
2014
- 2014-11-10 CN CN201410627865.0A patent/CN104453855B/en active Active
-
2015
- 2015-06-02 WO PCT/CN2015/080589 patent/WO2016074471A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN104453855A (en) | 2015-03-25 |
| WO2016074471A1 (en) | 2016-05-19 |
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Effective date of registration: 20200803 Address after: No.1 Workshop, No.10, Yuanhui Road, Chenjiang street, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee after: BAIQIN ENERGY TECHNOLOGY (HUIZHOU) Co.,Ltd. Address before: 7, building three, block A, Tianli Central Business Plaza, Hyde Road, Shenzhen, Nanshan District, Guangdong 518054, China Patentee before: PETRO-KING OILFIELD TECHNOLOGY Ltd. |