CN112832672A - Underground power drilling tool with function of monitoring loosening of screw threads - Google Patents
Underground power drilling tool with function of monitoring loosening of screw threads Download PDFInfo
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- CN112832672A CN112832672A CN202011289949.XA CN202011289949A CN112832672A CN 112832672 A CN112832672 A CN 112832672A CN 202011289949 A CN202011289949 A CN 202011289949A CN 112832672 A CN112832672 A CN 112832672A
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- 238000005553 drilling Methods 0.000 title claims abstract description 71
- 238000012544 monitoring process Methods 0.000 title claims abstract description 46
- 239000004020 conductor Substances 0.000 claims abstract description 99
- 239000002184 metal Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 230000000712 assembly Effects 0.000 claims description 17
- 238000000429 assembly Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 210000004907 gland Anatomy 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Classifications
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model relates to an underground power drilling tool with monitoring screw thread is not hard up belongs to power drilling tool technical field, includes: the power drilling tool comprises shells which are sequentially connected along the axial direction of the power drilling tool, and two adjacent shells are connected through screw threads; and the monitoring unit comprises an on-off ring and a conductor assembly which are positioned between two adjacent shells, and when the two adjacent shells rotate relatively, the on-off ring is connected with or disconnected from the conductor assembly. The underground power drilling tool adopts a direct monitoring mode, utilizes the characteristic that the screw thread can loosen and generate relative sliding before the shell is tripped, detects whether a circuit is switched on or switched off by adding a circuit switching-off ring on the shell, and checks whether the shell slides relatively to judge whether the screw thread loosens. The device has the characteristics of accuracy and uniqueness of monitoring signals, simple structure and high reliability.
Description
Technical Field
The application relates to the technical field of power drilling tools, in particular to an underground power drilling tool with a function of monitoring loosening of screw threads.
Background
In oil and gas exploitation, downhole power drilling tools are increasingly widely used, the power drilling tools drive drill bits to achieve stratum drilling, the downhole power drilling tools are driven by drilling fluid pumped in through ground equipment, during operation, the drilling fluid is pumped into the downhole power drilling tools, and the power drilling tools convert hydraulic energy into kinetic energy to drive well bottom drill bits to rotate. There are two common types of power drills: screw drills and turbine drills.
For a screw drilling tool, drilling fluid enters a stator shell to drive a rotor screw eccentric to the stator shell to rotate, and the rotor screw drives a universal shaft and a transmission shaft connected with the rotor screw to rotate, so that a drill bit at the lower end of the drilling tool is driven to rotate. The turbine drilling tool adopts one-stage or multi-stage turbine sections to provide torque for a drill bit at the lower end of the drilling tool, each stage is composed of a stator which does not move and a rotor which rotates, the rotor is connected with a shaft, drilling fluid is guided into the rotor by the stator, and rotor blades rotate under the action of the drilling fluid to provide torque for the drill bit at the lower end of the drilling tool.
The shell is a main supporting system of the power drilling tool, and the shells of all functional sections of the power drilling tool are mutually fastened together under the action of larger torsion force through the threaded male buckle and the threaded female buckle, so that the power drilling tool is integrated. The power drilling tool can meet various working conditions under the well, the back torque impact between the threads is often formed under the action of certain working condition factors, and the fastening force between the threads is reduced due to the repeated back torque impact. When the counter torque exceeds the screw thread torque instantaneously, the male thread and the female thread are loosened and reverse, and the lower body drops off when the male thread and the female thread are reversed to the connection limit position of the screw thread, and the whole section of the lower body drops down. The tripping and well falling of the power drilling tool cause huge loss to well drilling, the well needs to be stopped and flooded, and the well to be filled and sidetracked or the whole well which cannot be salvaged is scrapped.
In the related technology, the prevention of the tripping of the power drilling tool at home and abroad is mainly controlled by improving the processing technology and structure, setting the use time and the like, but the tripping fault cannot be effectively prevented. The abnormal analysis of parameters such as pump pressure, drilling pressure and torque can only judge whether the tripping is generated, and the occurrence of the tripping cannot be predicted. At present, some domestic and foreign enterprises can reflect the drilling faults of the drilling tool to different degrees by adopting technical means such as an underground fault monitoring system and the like, so that the accuracy of the fault judgment of the drilling tool is greatly improved, but the sudden unexpected phenomenon of no-predictive specific drilling tool failure can not be predicted by a good monitoring mode all the time, and related solutions are not found in related documents.
Disclosure of Invention
The embodiment of the application provides a downhole power drilling tool with monitoring screw thread looseness to solve the problem that the tripping fault of the power drilling tool cannot be effectively prevented in the related technology.
The embodiment of the application provides a downhole motor with it is not hard up to monitor screw thread, includes:
the power drilling tool comprises shells which are sequentially connected along the axial direction of the power drilling tool, and two adjacent shells are connected through screw threads;
and the monitoring unit comprises an on-off ring and a conductor assembly which are positioned between two adjacent shells, and when the two adjacent shells rotate relatively, the on-off ring is connected with or disconnected from the conductor assembly.
In some embodiments: the on-off ring is positioned on the end face of one of the two adjacent shells, and the conductor assembly is positioned on the end face of the other of the two adjacent shells.
In some embodiments: and an annular groove for accommodating the on-off ring is formed in the end face of one of the shells, the on-off ring is positioned in the annular groove, and insulating glue insulated from the on-off ring is coated in the annular groove.
In some embodiments: the on-off ring comprises a metal conducting ring, a plurality of grooves are formed in the inner ring or the outer ring of the metal conducting ring at intervals along the circumferential direction of the metal conducting ring, and arc-shaped blocks made of insulating materials are embedded in the grooves.
In some embodiments: and a conductive rib communicated with the conductor assembly is formed between every two adjacent arc-shaped blocks, and the arc length of the conductive rib is smaller than that of each arc-shaped block.
In some embodiments: and the end surface of the other shell is provided with a mounting hole for accommodating the conductor assembly, and the conductor assembly is positioned in the mounting hole and is abutted against the on-off ring.
In some embodiments: the conductor assembly comprises an insulating tube and a conductor pressure head positioned in the insulating tube, a metal spring for pushing the conductor pressure head to move towards the on-off ring is further arranged in the insulating tube, and a lead is connected to the conductor pressure head and/or the metal spring.
In some embodiments: the one end of insulating tube is equipped with the control the spacing step of conductor pressure head displacement range, the other end of insulating tube is equipped with insulating gland, set up on the insulating gland and penetrate the through wires hole of wire, the top of conductor pressure head is the calotte.
In some embodiments: the monitoring unit further comprises a circuit board, the circuit board is located in the shells, at least two groups of conductor assemblies are arranged, one group of conductor assemblies is always conducted with the on-off ring, the other group of conductor assemblies is conducted with or disconnected from the on-off ring when the two adjacent shells rotate relatively, and the input end of the circuit board is electrically connected with the two groups of conductor assemblies respectively.
In some embodiments: the casing includes follows bypass valve casing, the anti-falling casing, stator casing, universal shaft casing and the transmission shaft casing that power drilling tool's axis direction screw thread connects in proper order, the both ends of anti-falling casing, stator casing and universal shaft casing are equipped with respectively break-make ring or conductor assembly, the bottom of bypass valve casing and the top of transmission shaft casing are equipped with break-make ring or conductor assembly.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides an underground power drilling tool with a function of monitoring loosening of screw threads, and the underground power drilling tool is provided with the power drilling tool and a monitoring unit, wherein the power drilling tool comprises shells which are sequentially connected along the axial direction of the power drilling tool, and two adjacent shells are connected through the screw threads; the monitoring unit comprises an on-off ring and a conductor assembly which are positioned between two adjacent shells, and when the two adjacent shells rotate relatively, the on-off ring is connected with or disconnected from the conductor assembly.
Therefore, the underground power drilling tool is characterized in that the on-off ring and the conductor assembly are respectively embedded between two adjacent shells based on the characteristic that relative rotation can occur after the threads of the shells are loosened. When two adjacent shells rotate relatively, namely the screw threads are loosened, the on-off ring is connected with or disconnected from the conductor assembly, an electric signal is transmitted to the circuit board, and the circuit board processes the signal and transmits the signal to the MWD probe tube for uploading. The underground power drilling tool adopts a direct monitoring mode, utilizes the characteristic that the screw thread can loosen and generate relative sliding before the shell is released, detects whether a circuit is connected or disconnected by adding a circuit on-off ring on the shell, and checks whether the shell slides relatively to judge whether the screw thread looses. The device has the characteristics of accuracy and uniqueness of monitoring signals, simple structure and high reliability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
FIG. 4 is a schematic structural diagram of an embodiment of the present disclosure;
FIG. 5 is a front view of the structure of the on-off ring of the embodiment of the present application;
FIG. 6 is a structural half-sectional view of an on-off ring of an embodiment of the present application;
fig. 7 is an exploded view of the structure of a conductor assembly according to an embodiment of the present application.
Reference numerals:
1. a power drill; 11. a bypass valve housing; 12. the shell is prevented from falling; 13. a stator housing; 14. a cardan shaft housing;
2. a monitoring unit; 21. a break-make ring; 22. a conductor assembly; 23. a circuit board; 211. a metal conducting ring; 212. an arc-shaped block; 221. an insulating tube; 222. a conductor crimp; 223. a metal spring; 224. an insulating gland; 225. and (4) conducting wires.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a downhole power drilling tool with monitoring screw thread looseness, which can solve the problem that the tripping fault of the power drilling tool cannot be effectively prevented in the related technology.
Referring to fig. 1 to 4, an embodiment of the present application provides a downhole motor with a thread loosening monitoring function, including:
the power drilling tool 1 comprises shells which are sequentially connected along the axial direction of the power drilling tool 1, the shells are of hollow pipe body structures, and two adjacent shells are connected through screw threads. The power drill 1 of the present application may be a screw drill or a turbine drill, and the present embodiment is described in detail by taking a screw drill as an example. The housing of the present embodiment includes a bypass valve housing 11, a drop-proof housing 12, a stator housing 13, a universal shaft housing 14, and a transmission shaft housing (not shown) which are screwed (threaded) in this order.
The monitoring unit 2 comprises an on-off ring 21 and a conductor assembly 22, wherein the on-off ring 21 and the conductor assembly 22 are positioned between two adjacent shells, and when the two adjacent shells rotate relatively, the on-off ring 21 is connected with or disconnected from the conductor assembly 22. When two adjacent shells rotate relatively, the on-off ring 21 and the conductor assembly 22 are triggered to be connected or disconnected, and wellhead detection equipment can directly judge and predict whether the screw thread of the shell is loosened or tripped through on-off signals of the on-off ring 21 and the conductor assembly 22.
In some alternative embodiments: referring to fig. 2-4, the embodiment of the application provides a downhole motor with a thread loosening monitoring function, wherein a break-off ring 21 of the downhole motor is positioned on the end face of one of two adjacent shells, and a conductor assembly 22 is positioned on the end face of the other of the two adjacent shells. The present embodiment will be described by taking as an example the bypass valve housing 11 and the drop-proof housing 12 which are screwed together.
An annular groove for accommodating the on-off ring 21 is formed in the bottom end face of the bypass valve housing 11 (i.e., the end face of the root of the external thread of the bypass valve housing 11), the on-off ring 21 is located in the annular groove, and an insulating glue insulated from the on-off ring 21 is coated in the annular groove and used for preventing the on-off ring 21 and the bypass valve housing 11 from being conductive.
A mounting hole for accommodating the conductor assembly 22 is formed in an end surface of the top of the drop-proof housing 12 (i.e., an end surface of the top of the internal thread of the drop-proof housing 12), and the conductor assembly 22 is located in the mounting hole and abuts against the on-off ring 21. When the bypass valve housing 11 and the drop-proof housing 12 are rotated relatively, the trigger conductor assembly 22 and the on-off ring 21 are switched from the off state to the on state, or from the on state to the off state.
In the embodiment, the on-off ring 21 is fixedly installed in the annular groove on the end face of the bottom of the bypass valve shell 11, the conductor assembly 22 is installed in the end face installation hole at the top end of the anti-drop shell 12, the on-off ring 21 and the conductor assembly 22 are integrally installed with the shell of the power drilling tool 1, the shell structure and the strength of the power drilling tool 1 are not affected, the power drilling tool is easy to machine, and the service life and the reliability are high.
In some alternative embodiments: referring to fig. 5 and 6, an embodiment of the present invention provides a downhole motor with a thread loosening monitoring function, where the on-off ring 21 of the downhole motor includes a conductive metal ring 211, 2 to 20 grooves are formed in an inner ring or an outer ring of the conductive metal ring 211 along a circumferential direction of the conductive metal ring 211, and an arc-shaped block 212 made of an insulating material is embedded in each groove. A conductive rib communicated with the conductor assembly 22 is formed between two adjacent arc-shaped blocks 212, and the conductive rib and the metal conductive ring 211 are of an integrated structure. To facilitate accurate installation, the arc length of the conductive bars is less than the arc length of the arc-shaped blocks 212.
When the bypass valve housing 11 and the anti-drop housing 12 are fastened to each other, the conductor assembly 22 abuts against the arc-shaped block 212, the electric circuit between the on-off ring 21 and the conductor assembly 22 is in an off state, and the monitoring unit 2 does not send an alarm signal to wellhead detection equipment when the power drilling tool 1 is in the downhole drilling operation. When the bypass valve shell 11 and the anti-drop shell 12 rotate relatively to cause the screw thread between the bypass valve shell 11 and the anti-drop shell 12 to be loosened, the conductor assembly 22 is abutted against the conductive rib, the electric loop between the on-off ring 21 and the conductor assembly 22 is in a conducting state, and the monitoring unit 2 sends an alarm signal to wellhead detection equipment at the first time when the power drilling tool 1 is in underground drilling operation.
In some alternative embodiments: referring to fig. 4 and 7, embodiments of the present application provide a downhole motor with a thread loosening monitoring feature, the conductor assembly 22 of which includes an insulated pipe 221 and a conductor ram 222 positioned within the insulated pipe 221. The top end of the conductor ram 222 is domed to ensure that the head of the conductor ram 222 makes reliable contact and slides with the break-make ring 21. A metal spring 223 is further disposed in the insulating tube 221 for pushing the conductor ram 222 to move toward the switching ring 21, and the metal spring 223 is preferably, but not limited to, a compression coil spring for ensuring a reliable contact force between the conductor ram 222 and the switching ring 21, and thus the conductor ram 222 can work even if it is worn. A line 225 is connected to the conductor ram 222 or the metal spring 223, and the line 225 is used to complete an external circuit.
The top end of the insulating tube 221 is provided with a limit step for controlling the moving range of the conductor pressing head 222, and the limit step is used for controlling the moving range of the conductor pressing head 222 towards the direction of the on-off ring 21 and preventing the conductor pressing head 222 from being separated from the insulating tube 221 under the pushing action of the metal spring 223. An insulating gland 224 is provided at the bottom end of the insulating tube 221, and the insulating gland 224 and the insulating tube 221 are used to prevent the conductor ram 222 and the metal spring 223 from being electrically conductive with the drop-proof housing 12. A threading hole for threading the conducting wire 225 is arranged on the insulating gland 224, and the conducting wire 225 is connected to an external circuit through the threading hole of the insulating gland 224.
The conductor pressing head 222 is a cylindrical structure with a thin upper part and a thick lower part, the conductor pressing head 222 is preferably made of copper with good electric conductivity, the upper end of the conductor pressing head 222 can freely move in a limiting step, the inner diameter of the limiting step is smaller than the diameter of the lower end of the conductor pressing head 222, and the lower end of the conductor pressing head 222 can freely move in the insulating tube 221.
In some alternative embodiments: referring to fig. 1 to 3, the embodiment of the present application provides a downhole motor with a thread loosening monitoring function, and the monitoring unit of the downhole motor further comprises a circuit board 23, and the circuit board 23 is located in the anti-drop housing 12. At least two groups of conductor assemblies 22 are provided, wherein one group of conductor assemblies 22 is always conducted with the metal conductive ring 211 of the on-off ring 21, the other group of conductor assemblies 22 is conducted or disconnected with the on-off ring 21 when the bypass valve shell 11 and the anti-drop shell 12 rotate relatively, and the input ends of the circuit board 23 are respectively electrically connected with the two groups of conductor assemblies 22 to form an electric loop. The circuit board 23 transmits the processed signals to the MWD probe and uploads the processed signals to wellhead detection equipment.
Of course, the conductor assemblies 22 of the present embodiment are not limited to two sets, and one set of the conductor assemblies 22 may be electrically connected to the circuit board, when one set of the conductor assemblies 22 is provided, the on-off ring 21 is electrically connected to the housing, and the input end of the circuit board 23 is connected to the conductor assemblies 22 and the housing respectively to form an electrical circuit.
In some alternative embodiments: referring to fig. 1 to 3, the present embodiment provides a downhole motor having a thread loosening monitoring function, and the housing of the downhole motor includes a bypass valve housing 11, a drop prevention housing 12, a stator housing 13, a universal shaft housing 14, and a drive shaft housing (not shown) that are screwed in this order in the axial direction of the motor 1. Two ends of the anti-drop shell 12, the stator shell 13 and the universal shaft shell 14 are respectively provided with an on-off ring 21 and a conductor assembly 22, and the bottom end of the bypass valve shell 11 and the top end of the transmission shaft shell are provided with the on-off ring 21 or the conductor assembly 22.
When the top end of the anti-drop shell 12 is provided with the on-off ring 21 and the bottom end is provided with the conductor assembly 22, the bottom end of the bypass valve shell 11 connected with the anti-drop shell is provided with the conductor assembly 22 matched with the bypass valve shell, and the top end of the stator shell 13 is provided with the on-off ring 21 matched with the stator shell.
When the on-off rings 21 are arranged at the top end and the bottom end of the anti-drop shell 12, the conductor assembly 22 matched with the on-off rings is arranged at the bottom end of the bypass valve shell 11 connected with the on-off rings in a threaded manner, and the conductor assembly 22 matched with the on-off rings is arranged at the top end of the stator shell 13.
When the conductor assemblies 22 are arranged at the top end and the bottom end of the anti-drop shell 12, the on-off ring 21 matched with the bypass valve shell 11 is arranged at the bottom end of the bypass valve shell connected with the screw threads of the anti-drop shell, and the on-off ring 21 matched with the bypass valve shell 13 is arranged at the top end of the stator shell. The other adjacent housings are analogized once.
The on-off ring 21 and the conductor assembly 22 are not limited to be installed between two adjacent shells, and the on-off ring 21 and the conductor assembly 22 are further suitable for being installed between the anti-drop rod, the rotor screw, the universal shaft and the transmission shaft which are connected in turn through screw threads in the power drilling tool 1.
Principle of operation
The embodiment of the application provides an underground power drilling tool capable of monitoring the loosening of screw threads, and the underground power drilling tool is provided with a power drilling tool 1 and a monitoring unit 2, wherein the power drilling tool 1 comprises shells which are sequentially connected along the axial direction of the power drilling tool 1, and two adjacent shells are connected through the screw threads; the monitoring unit 2 comprises an on-off ring 21 and a conductor assembly 22 which are positioned between two adjacent shells, and when the two adjacent shells rotate relatively, the on-off ring 21 is connected with or disconnected from the conductor assembly 22.
The underground power drilling tool is characterized in that the on-off ring 21 and the conductor assembly 22 are respectively embedded between two adjacent shells based on the characteristic that relative rotation can occur after the threads of the shells are loosened. When two adjacent shells rotate relatively, namely the screw threads are loosened, the on-off ring 21 and the conductor assembly 22 are connected or disconnected, an electric signal is transmitted to the circuit board 23, and the circuit board 23 processes the signal and transmits the signal to the MWD probe for uploading. The underground power drilling tool adopts a direct monitoring mode, utilizes the characteristic that the screw thread is loosened and generates relative sliding before the shell is released, detects whether a circuit is connected or disconnected by adding a circuit on-off ring 21 on the shell, and detects whether the shell slides relatively to judge whether the screw thread is loosened. The device has the characteristics of accuracy and uniqueness of monitoring signals, simple structure and high reliability.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A downhole motor having a thread loosening monitoring feature, comprising:
the power drilling tool (1) comprises shells which are sequentially connected along the axial direction of the power drilling tool (1), and two adjacent shells are connected through screw threads;
the monitoring unit (2) comprises an on-off ring (21) and a conductor assembly (22) which are positioned between two adjacent shells, and when the two adjacent shells rotate relatively, the on-off ring (21) is connected with or disconnected from the conductor assembly (22).
2. The downhole motor of claim 1 having a thread loosening monitoring feature, wherein:
the on-off ring (21) is positioned on the end face of one of the two adjacent shells, and the conductor assembly (22) is positioned on the end face of the other of the two adjacent shells.
3. The downhole motor of claim 2 having a thread loosening monitoring feature, wherein:
the end face of one of the shell is provided with an annular groove for accommodating the on-off ring (21), the on-off ring (21) is positioned in the annular groove, and insulating glue insulated from the on-off ring (21) is coated in the annular groove.
4. A downhole motor having thread loosening monitoring as claimed in claim 1 or 2, wherein:
the on-off ring (21) comprises a metal conductive ring (211), wherein a plurality of grooves which are arranged at intervals are formed in the circumferential direction of the metal conductive ring (211) along the inner ring or the outer ring of the metal conductive ring (211), and an insulating material arc-shaped block (212) is embedded in each groove.
5. The downhole motor of claim 4 having thread loosening monitoring features, wherein:
and a conductive rib communicated with the conductor assembly (22) is formed between two adjacent arc-shaped blocks (212), and the arc length of the conductive rib is smaller than that of the arc-shaped block (212).
6. The downhole motor of claim 2 having a thread loosening monitoring feature, wherein:
and the end surface of the other shell is provided with a mounting hole for accommodating the conductor assembly (22), and the conductor assembly (22) is positioned in the mounting hole and is abutted against the on-off ring (21).
7. A downhole motor having thread loosening monitoring as claimed in claim 1 or 6, wherein:
the conductor assembly (22) comprises an insulating tube (221) and a conductor pressure head (222) located in the insulating tube (221), a metal spring (223) pushing the conductor pressure head (222) to move towards the direction of the on-off ring (21) is further arranged in the insulating tube (221), and a lead (225) is connected to the conductor pressure head (222) and/or the metal spring (223).
8. The downhole motor of claim 7 having a thread loosening monitoring feature, wherein:
one end of the insulating tube (221) is provided with a limiting step for controlling the moving range of the conductor pressing head (222), the other end of the insulating tube (221) is provided with an insulating pressing cover (224), a threading hole penetrating into the conducting wire (225) is formed in the insulating pressing cover (224), and the top end of the conductor pressing head (222) is a dome.
9. A downhole motor having thread loosening monitoring as claimed in claim 1 or 2, wherein:
the monitoring unit (2) further comprises a circuit board (23), the circuit board (23) is located in the shell, at least two groups of conductor assemblies (22) are arranged, one group of conductor assemblies (22) is communicated with the on-off ring (21), the other group of conductor assemblies (22) is communicated with the on-off ring (21) or disconnected when the two adjacent shells rotate relatively, and the input end of the circuit board (23) is electrically connected with the two groups of conductor assemblies (22) respectively.
10. The downhole motor of claim 1 having a thread loosening monitoring feature, wherein:
the casing includes the edge bypass valve casing (11), prevent falling casing (12), stator casing (13), universal shaft casing (14) and the transmission shaft casing that the axis direction of power drilling tool (1) screw thread connects in proper order, the both ends of preventing falling casing (12), stator casing (13) and universal shaft casing (14) are equipped with respectively break-make ring (21) or conductor assembly (22), the bottom of bypass valve casing (11) and the top of transmission shaft casing are equipped with break-make ring (21) or conductor assembly (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011289949.XA CN112832672B (en) | 2020-11-17 | 2020-11-17 | Underground power drilling tool with monitoring screw loosening function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011289949.XA CN112832672B (en) | 2020-11-17 | 2020-11-17 | Underground power drilling tool with monitoring screw loosening function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112832672A true CN112832672A (en) | 2021-05-25 |
| CN112832672B CN112832672B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011289949.XA Active CN112832672B (en) | 2020-11-17 | 2020-11-17 | Underground power drilling tool with monitoring screw loosening function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07279936A (en) * | 1994-04-11 | 1995-10-27 | Kubota Corp | Detector for looseness of screw |
| CN1407570A (en) * | 2001-09-04 | 2003-04-02 | 时代触点有限公司 | Voltage force contact |
| CN204476267U (en) * | 2015-03-18 | 2015-07-15 | 西南石油大学 | There is the mud motor of deflecting function |
| CN104851246A (en) * | 2015-05-26 | 2015-08-19 | 重庆大学 | Device used to monitor bolt fracture or looseness |
| CN204680816U (en) * | 2015-05-26 | 2015-09-30 | 中国海洋石油总公司 | Contact pin and lateralog |
| CN207816574U (en) * | 2017-12-13 | 2018-09-04 | 浙江中烟工业有限责任公司 | A kind of device of detection nut loosening |
-
2020
- 2020-11-17 CN CN202011289949.XA patent/CN112832672B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07279936A (en) * | 1994-04-11 | 1995-10-27 | Kubota Corp | Detector for looseness of screw |
| CN1407570A (en) * | 2001-09-04 | 2003-04-02 | 时代触点有限公司 | Voltage force contact |
| CN204476267U (en) * | 2015-03-18 | 2015-07-15 | 西南石油大学 | There is the mud motor of deflecting function |
| CN104851246A (en) * | 2015-05-26 | 2015-08-19 | 重庆大学 | Device used to monitor bolt fracture or looseness |
| CN204680816U (en) * | 2015-05-26 | 2015-09-30 | 中国海洋石油总公司 | Contact pin and lateralog |
| CN207816574U (en) * | 2017-12-13 | 2018-09-04 | 浙江中烟工业有限责任公司 | A kind of device of detection nut loosening |
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| CN112832672B (en) | 2023-05-02 |
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