CN210888920U - Underground slurry pulse generating device - Google Patents
Underground slurry pulse generating device Download PDFInfo
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- CN210888920U CN210888920U CN201921726898.5U CN201921726898U CN210888920U CN 210888920 U CN210888920 U CN 210888920U CN 201921726898 U CN201921726898 U CN 201921726898U CN 210888920 U CN210888920 U CN 210888920U
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Abstract
The utility model provides a mud pulse generator in pit, its simple structure, design compactness, resistant mud erosion, transmission signal are stable. Main valve device, control valve device have been arranged in order along the mud direction of flow in the inner chamber of drilling rod, the main valve device specifically includes and filters stopper, valve body, compression spring, main shaft, the main shaft includes axle portion, rear end coupling part, the rear end coupling part adorn admittedly in the corresponding axial position of drilling rod, rear end coupling part's thickness direction hoop equipartition has the mud discharge orifice, the center pin position of main shaft is provided with central through hole, the front end rigid coupling of axle portion has filter the stopper, the regional cover in length direction middle part of axle portion is equipped with the valve body, axle portion correspond to radial reposition of redundant personnel hole has been seted up to the position of the inner chamber of valve body, the inner intercommunication in radial reposition of redundant personnel hole the central through hole, the front end lateral wall in radial reposition of redundant personnel hole with be connected with between the front end.
Description
Technical Field
The utility model relates to a wireless technical field who follows along with boring the inclinometer specifically is a mud pulse generator in pit.
Background
With the deepening of petroleum exploration and development, the stratum structure is more and more complex, and deep wells, high-temperature wells, high-pressure wells and other special wells are more and more, the well deviation measurement of the special wells faces unprecedented huge challenges, and with the development of the drilling technology and the continuous improvement of the exploration and development requirements, the demand on the logging technology is higher and higher. The accuracy of the logging technique depends on the authenticity and rapidity with which downhole information is obtained, the key technique being the transmission of downhole information.
Measurement while drilling information transmission modes are divided into a wired transmission mode and a wireless transmission mode, wherein the wireless transmission mode is gradually and generally applied due to convenient use and high efficiency. The wireless transmission modes mainly comprise slurry transmission, electromagnetic wave transmission and sound wave transmission. Wherein the acoustic transmission technology is still in the experimental research stage at present; the electromagnetic wave transmission technology is greatly influenced by well depth and geological conditions, and the application range is limited; mud pulse transmission technology is most widely used commercially.
Therefore, the mud pulse generating device becomes one of the most key components of the wireless inclinometer while drilling, and is a quick-wear part and a consumable part in the wireless inclinometer while drilling because the mud pulse generating device is in direct contact with the mud and receives the high-speed scouring and erosion effects of the mud. At present, a more common mud pulse generating device is large, the structure is complex, a mud channel is tortuous and complex, the failure rate is high, the use and the maintenance are inconvenient, particularly the problem that the device cannot be solved on site is often solved a little, the device is also transported back to a manufacturer or a base for maintenance, the logistics and time cost is increased, and the drilling cost is increased.
Disclosure of Invention
To the problem, the utility model provides a mud pulse generator in pit, its simple structure, design compactness, resistant mud erosion, transmission signal are stable.
A downhole mud pulse generating device is characterized in that: the drilling rod comprises a drilling rod, a main valve device and a control valve device, wherein the main valve device and the control valve device are sequentially arranged in an inner cavity of the drilling rod along a slurry flowing direction, the main valve device specifically comprises a filtering plug, a valve body, a compression spring and a main shaft, the main shaft comprises a shaft part and a rear end connecting part, the rear end connecting part is fixedly arranged at the corresponding axial position of the drilling rod, slurry outflow holes are uniformly distributed in the circumferential direction of the thickness direction of the rear end connecting part, a central through hole is formed in the central shaft position of the main shaft, the front end of the shaft part is fixedly sleeved with the filtering plug, the valve body is sleeved in the middle area of the length direction of the shaft part, a radial shunting hole is formed in the position of the shaft part, which corresponds to the inner cavity of the valve body, the inner end of the radial shunting hole is communicated with the central through hole, the compression spring is sleeved in a corresponding area of the shaft part, the rear end center position of the rear end connecting part is recessed to form a positioning installation cavity, the control valve device comprises a control valve shell, an electromagnet mechanism, a connector shell and a communication assembly, the front end of the control valve shell is positioned and installed in the positioning installation cavity, the front end center of the control valve shell is provided with a central flow guide hole, the part of the control valve shell exposed out of the positioning installation cavity is of an annular structure, the outer wall of the middle area of the annular structure is provided with a plurality of flow holes, the inner cavity of the annular structure is used for arranging a piston rod, the electromagnet mechanism comprises an electromagnet shell, an electromagnet assembly and a telescopic output end, the electromagnet assembly is arranged in the inner cavity of the electromagnet shell, and the front end of the electromagnet shell is in threaded connection with a rear end connecting ring of the control valve shell, the electromagnet assembly is connected with the telescopic output end, the telescopic output end is positioned in the inner cavity of the annular structure, the piston rod is fixedly connected with the telescopic output end, the front end of the piston rod is shaped like the rear end of the central flow guide hole, the front end of the piston rod faces the rear end of the central flow guide hole, the front end of the connector shell is in threaded connection with the rear part of the electromagnet shell, a communication assembly is arranged in the connector shell and comprises a connector socket and a connector plug, the rear end of the electromagnet assembly is fixedly connected with the connector socket, one end of the connector plug is inserted in the connector socket, the other end of the connector plug penetrates through the central connection hole of the rear end plate of the connector shell, and a sealing ring is arranged between the connector plug and the outer ring wall of the central connection hole, the other end of the connector plug is used for externally connecting an electric signal.
It is further characterized in that:
the rubber corrugated pipe is arranged on the periphery of the outer ring of the telescopic output end, the rear end of the rubber corrugated pipe in the length direction is fixedly installed in a space area formed by the front end face of the electromagnet shell and the positioning stop ring of the annular structure, and the front end of the rubber corrugated pipe in the length direction is fixedly sleeved on the outer ring face of the rear end of the piston rod through a buckling and pressing pipe, so that slurry cannot enter the electromagnet assembly and the communication assembly;
an oil filling hole is formed in one radial position of an outer ring at the rear end of the connector shell, an oil filling joint is arranged on the oil filling hole and is fixedly connected with the oil filling hole in a threaded manner, a sealing ring and a retaining ring are arranged on the oil filling joint to realize a sealing function, and oil is filled into a cavity formed by combining the electromagnet shell, the connector shell and the rubber corrugated pipe through the oil filling joint to form a sealed oil cavity, so that slurry is not easy to enter the sealed oil cavity, and normal operation of equipment is ensured;
the front end of the connector shell is connected with the internal thread at the rear end of the electromagnet shell through external threads, a disc spring is arranged between the front end face of the connector shell and the rear end face of the electromagnet assembly, and the disc spring ensures that no moving space exists between the connector shell and the electromagnet assembly and that the positions of all mechanisms are stable and reliable during working;
a sealing ring and a check ring are arranged between the outer circumference of the front end of the connector shell and the inner ring wall of the rear end of the electromagnet shell to ensure sealing;
the drill rod comprises a first sleeve and a second sleeve, wherein the rear end of the first sleeve is provided with internal threads, positioning connecting holes are annularly distributed in the front end surface of the second sleeve, the rear end connecting part comprises a front end connecting ring and a rear end flange ring, the diameter of the front end connecting ring is smaller than that of the rear end flange ring, the front end connecting ring is connected with the internal threads in the rear end of the first sleeve through external threads, the rear end flange ring is fixedly connected with the positioning connecting holes in the corresponding position of the second sleeve through axial bolts, the outer diameter of the rear end flange ring is the same as that of the first sleeve and the second sleeve, and the length of the second sleeve extends to the rear end surface of the connector shell;
a step ring is arranged at the position, corresponding to the front end conical guide part of the valve body, of the first sleeve, and the step ring and the front end conical guide part are combined to amplify the acting force of slurry on the valve body;
the tail end of the shaft part, which corresponds to the rear end guide ring of the valve body, is provided with a guide bulge ring, and the outer peripheral surface of the guide bulge ring is in clearance fit with the inner wall of the rear end guide ring, so that the axial movement and the deviation of the valve body are ensured;
the positioning installation cavity is specifically a boss inner concave cavity, an inner ring wall of a rear end large diameter of the positioning installation cavity is provided with an internal thread, the inner ring wall of the front end small diameter of the positioning installation cavity is tightly attached to an outer ring surface of a front end positioning bulge of the control valve shell, a sealing ring and a check ring are arranged, an external thread part of the outer ring periphery of the front end positioning of the control valve shell is in threaded connection with a corresponding internal thread of the positioning installation cavity, and a rear end plate of the front end of the control valve shell is tightly attached to a rear end face of the positioning installation cavity.
After the utility model is adopted, the mud pulse generator divides the mud into two parts, and most of the mud flows into the peripheral cavity of the lower drill rod, namely the main mud channel, through the inner cavity of the drill rod; a small part of the slurry flows into the inner cavity of the main shaft through the small hole of the filter plug and then flows into the main slurry channel through the outflow hole of the control valve shell, namely the control slurry channel; when the communication component sends a power supply signal to the electromagnet mechanism, the armature rod of the electromagnet mechanism drives the piston rod to extend forwards, so that the piston rod blocks the rear port of the central diversion hole, the control slurry channel is closed, the internal pressure of the main shaft of the main valve device rises, and the valve body of the main valve device is driven to move forwards; when the communication component sends a power-off signal to the electromagnet mechanism, the armature rod of the electromagnet mechanism drives the piston rod to move backwards, the control slurry channel is opened, slurry in the main shaft of the main valve device flows into the main slurry channel through the outflow hole of the control valve shell, the pressure in the main shaft is reduced, the slurry in the main slurry channel drives the valve body to move backwards, and along with the communication component sending a power-on and power-off signal to the electromagnet mechanism, a pressure pulse is generated in the inner cavity of the drill rod and is transmitted to a sensor on the ground to be converted into various data below the well through decoding; the device has the advantages of simple structure, compact design, slurry erosion resistance and stable signal transmission.
Drawings
FIG. 1 is a schematic sectional view of the front view of the present invention;
FIG. 2 is a schematic cross-sectional view of a main valve assembly according to the present invention;
fig. 3 is a schematic cross-sectional structural view of the control valve device of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the drill rod 1, the first sleeve 101, the second sleeve 102, the step ring 103, the main valve device 2, the control valve device 3, the filter plug 4, the valve body 5, the front end conical guide part 51, the rear end guide ring 52, the compression spring 6, the main shaft 7, the shaft part 71, the guide protrusion ring 711, the rear end connecting part 72, the front end connecting ring 721, the rear end flange ring 722, the slurry outlet hole 8, the central through hole 9, the radial flow-dividing hole 10, the front end side wall 11, the positioning installation cavity 13, the control valve housing 14, the rear end connecting ring 141, the outer ring periphery 142, the rear end plate 143, the front end positioning protrusion 144, the electromagnet mechanism 15, the connector housing 16, the communication assembly 17, the central flow-dividing hole 18, the flow-out hole 19, the piston rod 20, the electromagnet housing 21, the electromagnet assembly 22, the telescopic output end 23, the connector socket 24, the connector plug 25, the central connecting hole 26, the rubber bellows, A positioning stop ring 28, a pressure pipe 29, an oil injection joint 30 and a disc spring 31.
Detailed Description
A downhole mud pulse generating device, see fig. 1-3: the device comprises a drill rod 1, a main valve device 2 and a control valve device 3, wherein the main valve device 2 and the control valve device 3 are sequentially arranged in an inner cavity of the drill rod 1 along a slurry flowing direction, the main valve device 2 specifically comprises a filter plug 4, a valve body 5, a compression spring 6 and a main shaft 7, the main shaft 7 comprises a shaft portion 71 and a rear end connecting portion 72, the rear end connecting portion 72 is fixedly arranged at a corresponding axial position of the drill rod 1, slurry outlet holes 8 are circumferentially and uniformly distributed in the thickness direction of the rear end connecting portion 72, a central through hole 9 is arranged at the central shaft position of the main shaft 7, the filter plug 4 is fixedly sleeved at the front end of the shaft portion 71, the valve body 5 is sleeved in a middle area in the length direction of the shaft portion 71, a radial shunting hole 10 is arranged at a position of the shaft portion 71 corresponding to the inner cavity of the valve body 5, the inner end of the radial shunting hole 10 is communicated, the compression spring 6 is sleeved in a corresponding area of the shaft portion 71, the rear end center position of the rear end connecting portion 72 is recessed to form a positioning installation cavity 13, the control valve device 3 comprises a control valve shell 14, an electromagnet mechanism 15, a connector shell 16 and a communication assembly 17, the front end of the control valve shell 14 is positioned and installed in the positioning installation cavity 13, the front end center of the control valve shell 14 is provided with a central diversion hole 18, the part of the control valve shell 14 exposed out of the positioning installation cavity 13 is of an annular structure, the outer wall of the middle area of the annular structure is provided with a plurality of outflow holes 19, the inner cavity of the annular structure is used for arranging a piston rod 20, the electromagnet mechanism 15 comprises an electromagnet shell 21, an electromagnet assembly 22 and a telescopic output end 23, the electromagnet assembly 22 is arranged in the inner cavity of the electromagnet shell 21, and the front end of the electromagnet shell 21 is in threaded connection with a connecting ring, the electromagnet assembly 22 is connected with a telescopic output end 23, the telescopic output end 23 is positioned in an inner cavity of an annular structure, the piston rod 20 is fixedly connected with the telescopic output end 23, the front end of the piston rod 20 is shaped like the rear end of the central flow guide hole 18, the front end of the piston rod 20 is arranged towards the rear end of the central flow guide hole 18, the front end of the connector shell 16 is in threaded connection with the rear part of the electromagnet shell 21, a communication assembly 17 is arranged in the connector shell 16, the communication assembly 17 comprises a connector socket 24, the rear end of the electromagnet assembly 22 is fixedly connected with a connector socket 24, one end of the connector plug 25 is inserted into the connector socket 24, the other end of the connector plug 25 penetrates through a central connecting hole 26 of the rear end plate of the connector shell 16, a sealing ring is arranged between the outer annular wall of the connector plug 25 and the central connecting hole 26, and the other end of the connector plug 25 is used for externally connecting an electric signal.
A rubber corrugated pipe 27 is arranged on the outer circumference of the telescopic output end 23, the rear end of the rubber corrugated pipe 27 in the length direction is fixedly arranged on the front end surface of the electromagnet housing 21 and a space area formed by a positioning stop ring 28 of an annular structure, and the front end of the rubber corrugated pipe 27 in the length direction is fixedly sleeved on the outer ring surface of the rear end of the piston rod 20 through a buckling pipe 29, so that slurry is ensured not to enter the electromagnet assembly 22 and the communication assembly 17;
an oil filling hole is formed in one radial position of an outer ring at the rear end of the connector shell 16, an oil filling joint 30 is arranged on the oil filling hole, the oil filling joint 30 is fixedly connected with the oil filling hole in a threaded mode, a sealing ring and a retaining ring are arranged on the oil filling joint 30 to achieve a sealing function, oil is filled into a cavity formed by combining the electromagnet shell 21, the connector shell 16 and the rubber corrugated pipe 27 through the oil filling joint 30 to form a sealed oil cavity, mud is enabled not to enter the sealed oil cavity easily, and normal operation of equipment is guaranteed;
the front end of the connector shell 16 is connected with the internal thread at the rear end of the electromagnet shell 21 through the external thread, a disc spring 31 is arranged between the front end surface of the connector shell 16 and the rear end surface of the electromagnet assembly 22, and the disc spring 31 ensures that no moving space exists between the connector shell 16 and the electromagnet assembly 22 and the positions of all mechanisms are stable and reliable during working;
a sealing ring and a check ring are arranged between the outer circumference of the front end of the connector shell 16 and the inner ring wall of the rear end of the electromagnet shell 21 to ensure sealing;
the drill rod 1 comprises a first sleeve 101 and a second sleeve 102, wherein the rear end of the first sleeve 101 is provided with internal threads, the front end surface of the second sleeve 102 is annularly provided with positioning connecting holes, the rear end connecting part 72 comprises a front end connecting ring 721 and a rear end flange ring 722, the diameter of the front end connecting ring 721 is smaller than that of the rear end flange ring 722, the front end connecting ring 721 is connected with the internal threads at the rear end of the first sleeve 101 through external threads, the rear end flange ring 722 is fixedly connected with the positioning connecting holes at the corresponding positions of the second sleeve 102 through axial bolts, the outer diameter of the rear end flange ring 722 is the same as that of the first sleeve 101 and the second sleeve 102, and the length of the second sleeve 102 extends to the position of the rear end surface of the connector housing 16;
a step ring 103 is arranged on the first sleeve 101 at a position corresponding to the front end conical guide part 51 of the valve body 5, and the step ring 103 and the front end conical guide part 51 are combined to amplify the acting force of the slurry on the valve body 5;
the first sleeve 101 and the second sleeve 102 are made of high-hardness alloy steel, and the outer surfaces of the first sleeve and the second sleeve are sprayed with wear-resistant materials, so that the high-hardness wear-resistant sleeve has the characteristics of high mechanical strength and slurry erosion resistance;
the shaft part 71 is provided with a guide projection ring 711 corresponding to the tail end of the rear end guide ring 52 of the valve body 5, the outer peripheral surface of the guide projection ring 711 is in clearance fit with the inner wall of the rear end guide ring 52, and the axial movement and the deviation prevention of the valve body 5 are ensured;
the positioning installation cavity 13 is specifically a boss inner concave cavity, the inner ring wall of the rear end large diameter of the positioning installation cavity 13 is provided with an internal thread, the inner ring wall of the front end small diameter of the positioning installation cavity 13 is tightly attached to the outer ring surface of the front end positioning bulge 144 of the control valve shell 14 and is provided with a sealing ring and a retaining ring, the external thread part of the outer ring periphery 142 of the front end positioning of the control valve shell 14 is in threaded connection with the corresponding internal thread of the positioning installation cavity 13, and the rear end plate 143 of the front end of the control valve shell 14 is tightly attached to the rear end surface of the positioning installation cavity 13.
The working principle is as follows: the mud pulse generating device divides mud into two parts, and the vast majority of mud flows into a peripheral cavity of a lower drill rod, namely a main mud channel, through an inner cavity of the drill rod; a small part of the slurry flows into the inner cavity of the main shaft through the small hole of the filter plug and then flows into the main slurry channel through the outflow hole of the control valve shell, namely the control slurry channel; when the communication component sends a power supply signal to the electromagnet mechanism, the armature rod of the electromagnet mechanism drives the piston rod to extend forwards, so that the piston rod blocks the rear port of the central diversion hole, the control slurry channel is closed, the internal pressure of the main shaft of the main valve device rises, and the valve body of the main valve device is driven to move forwards; when the communication component sends a power-off signal to the electromagnet mechanism, the armature rod of the electromagnet mechanism drives the piston rod to move backwards, the control slurry channel is opened, slurry in the main shaft of the main valve device flows into the main slurry channel through the outflow hole of the control valve shell, the pressure in the main shaft is reduced, the slurry in the main slurry channel drives the valve body to move backwards, and along with the communication component sending a power-on and power-off signal to the electromagnet mechanism, a pressure pulse is generated in the inner cavity of the drill rod and is transmitted to a sensor on the ground to be converted into various data below the well through decoding; the device has the advantages of simple structure, compact design, slurry erosion resistance and stable signal transmission.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A downhole mud pulse generating device is characterized in that: the drilling rod comprises a drilling rod, a main valve device and a control valve device, wherein the main valve device and the control valve device are sequentially arranged in an inner cavity of the drilling rod along a slurry flowing direction, the main valve device specifically comprises a filtering plug, a valve body, a compression spring and a main shaft, the main shaft comprises a shaft part and a rear end connecting part, the rear end connecting part is fixedly arranged at the corresponding axial position of the drilling rod, slurry outflow holes are uniformly distributed in the circumferential direction of the thickness direction of the rear end connecting part, a central through hole is formed in the central shaft position of the main shaft, the front end of the shaft part is fixedly sleeved with the filtering plug, the valve body is sleeved in the middle area of the length direction of the shaft part, a radial shunting hole is formed in the position of the shaft part, which corresponds to the inner cavity of the valve body, the inner end of the radial shunting hole is communicated with the central through hole, the compression spring is sleeved in a corresponding area of the shaft part, the rear end center position of the rear end connecting part is recessed to form a positioning installation cavity, the control valve device comprises a control valve shell, an electromagnet mechanism, a connector shell and a communication assembly, the front end of the control valve shell is positioned and installed in the positioning installation cavity, the front end center of the control valve shell is provided with a central flow guide hole, the part of the control valve shell exposed out of the positioning installation cavity is of an annular structure, the outer wall of the middle area of the annular structure is provided with a plurality of flow holes, the inner cavity of the annular structure is used for arranging a piston rod, the electromagnet mechanism comprises an electromagnet shell, an electromagnet assembly and a telescopic output end, the electromagnet assembly is arranged in the inner cavity of the electromagnet shell, and the front end of the electromagnet shell is in threaded connection with a rear end connecting ring of the control valve shell, the electromagnet assembly is connected with the telescopic output end, the telescopic output end is positioned in the inner cavity of the annular structure, the piston rod is fixedly connected with the telescopic output end, the front end of the piston rod is shaped like the rear end of the central flow guide hole, the front end of the piston rod faces the rear end of the central flow guide hole, the front end of the connector shell is in threaded connection with the rear part of the electromagnet shell, a communication assembly is arranged in the connector shell and comprises a connector socket and a connector plug, the rear end of the electromagnet assembly is fixedly connected with the connector socket, one end of the connector plug is inserted in the connector socket, the other end of the connector plug penetrates through the central connection hole of the rear end plate of the connector shell, and a sealing ring is arranged between the connector plug and the outer ring wall of the central connection hole, the other end of the connector plug is used for externally connecting an electric signal.
2. The downhole mud pulser apparatus of claim 1, wherein: the outer ring periphery of the telescopic output end is provided with a rubber corrugated pipe, the rear end of the rubber corrugated pipe in the length direction is fixedly arranged in a space area formed by the front end surface of the electromagnet shell and the positioning stop ring of the annular structure, and the front end of the rubber corrugated pipe in the length direction is fixedly sleeved on the outer ring surface of the rear end of the piston rod through a buckling pipe.
3. The downhole mud pulser apparatus of claim 2, wherein: an oil filling hole is formed in one radial position of an outer ring at the rear end of the connector shell, an oil filling joint is arranged on the oil filling hole and is fixedly connected with the oil filling hole in a threaded mode, and a sealing ring and a retaining ring are arranged on the oil filling joint.
4. The downhole mud pulser apparatus of claim 1, wherein: the front end of the connector shell is connected with the internal thread at the rear end of the electromagnet shell through external threads, and a disc spring is arranged between the front end face of the connector shell and the rear end face of the electromagnet assembly.
5. The downhole mud pulser apparatus of claim 1, wherein: the drilling rod includes first sleeve, second sleeve, first telescopic rear end is provided with the internal thread, the telescopic front end face ring cloth of second has the location connecting hole, rear end coupling part includes front end go-between, rear end flange ring, the diameter of front end go-between is less than the rear end flange ring, the front end go-between passes through the external screw thread connection first telescopic rear end internal thread, the rear end flange ring passes through the axial bolt rigid coupling the location connecting hole of the telescopic corresponding position of second, the external diameter of rear end flange ring is the same with first sleeve, the telescopic external diameter of second, the telescopic length of second extends to the rear end face position department of connector shell.
6. The downhole mud pulser apparatus of claim 5, wherein: and a step ring is arranged at the position of the first sleeve corresponding to the front end conical guide part of the valve body, and the step ring and the front end conical guide part are combined to amplify the acting force of the slurry on the valve body.
7. The downhole mud pulser apparatus of claim 6, wherein: the tail end of the shaft part, which corresponds to the rear end guide ring of the valve body, is provided with a guide bulge ring, and the peripheral surface of the guide bulge ring is in clearance fit with the inner wall of the rear end guide ring.
8. The downhole mud pulser apparatus of claim 1, wherein: the positioning installation cavity is specifically a boss inner concave cavity, an inner ring wall of a rear end large diameter of the positioning installation cavity is provided with an internal thread, the inner ring wall of the front end small diameter of the positioning installation cavity is tightly attached to an outer ring surface of a front end positioning bulge of the control valve shell, a sealing ring and a check ring are arranged, an external thread part of the outer ring periphery of the front end positioning of the control valve shell is in threaded connection with a corresponding internal thread of the positioning installation cavity, and a rear end plate of the front end of the control valve shell is tightly attached to a rear end face of the positioning installation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921726898.5U CN210888920U (en) | 2019-10-15 | 2019-10-15 | Underground slurry pulse generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921726898.5U CN210888920U (en) | 2019-10-15 | 2019-10-15 | Underground slurry pulse generating device |
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| CN210888920U true CN210888920U (en) | 2020-06-30 |
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| CN201921726898.5U Active CN210888920U (en) | 2019-10-15 | 2019-10-15 | Underground slurry pulse generating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578515A (en) * | 2019-10-15 | 2019-12-17 | 无锡量子感知研究所 | Underground slurry pulse generating device |
| CN113431555A (en) * | 2021-06-22 | 2021-09-24 | 中海油田服务股份有限公司 | While-drilling electric imaging instrument |
-
2019
- 2019-10-15 CN CN201921726898.5U patent/CN210888920U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578515A (en) * | 2019-10-15 | 2019-12-17 | 无锡量子感知研究所 | Underground slurry pulse generating device |
| CN113431555A (en) * | 2021-06-22 | 2021-09-24 | 中海油田服务股份有限公司 | While-drilling electric imaging instrument |
| CN113431555B (en) * | 2021-06-22 | 2022-07-15 | 中海油田服务股份有限公司 | While-drilling electric imaging instrument |
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Effective date of registration: 20211209 Address after: 214000 No. 899, Huizhou Avenue, Qianzhou street, Huishan District, Wuxi City, Jiangsu Province (Urban Railway Huishan station area) Patentee after: Guoyi Petroleum Technology (Wuxi) Co.,Ltd. Address before: 215500 No.2, Zhanqian Road, Huishan Chengtie Station District, Huishan District, Wuxi City, Jiangsu Province Patentee before: Wuxi Institute of quantum perception |