CN113281387A - Polarization potential measuring equipment for directional drilling pipeline and use method thereof - Google Patents
Polarization potential measuring equipment for directional drilling pipeline and use method thereof Download PDFInfo
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Abstract
The invention discloses polarization potential measuring equipment for directionally drilling a pipeline and a using method thereof. The invention can simulate and test the polarization condition of carbon steel in different geological soil layers by drilling deep wells at two sides of the directional drill, placing the polarization test piece and the reference electrode into the well at different depths, and measuring the polarization potential condition of the polarization test piece at different depth positions, thereby reflecting the polarization condition of the directional drill pipeline at different depths, and the polarization condition of the polarization test piece at different depths can be regarded as the polarization condition of the pipeline at different buried depths of the directional drill, and the polarization potential of the polarization test piece is equal to the polarization potential of a damaged point at the position of the directional drill pipeline with the same depth of the polarization test piece, thereby solving the problem that the polarization potential measuring equipment of the directional drill pipeline cannot be used for directionally drilling through river pipelines.
Description
Technical Field
The invention relates to the technical field of pipeline construction, in particular to polarization potential measuring equipment for directionally drilling a pipeline and a using method thereof.
Background
The directional drilling is a pipeline construction process in the engineering technology industry, is generally used for the construction of petroleum, natural gas and some municipal pipelines, and is carried out after the processes of positioning drilling, reaming, cleaning holes, back dragging of pipelines and the like are carried out by a large-scale directional drilling machine.
In the pipeline construction, because of the limitation of natural conditions such as topography and landform, when the pipeline passes through special sections such as large rivers, expressways, ground barriers and the like, the construction is often carried out by adopting a directional drilling and crossing mode. However, directional traversal suffers from several drawbacks, including: in the back dragging process of the directional drilling pipeline, the anticorrosive coating is easily scratched, and even the repaired mouth material is likely to fall off in a large area; the pipeline has large buried depth, is not easy to approach and has complex penetrating stratum, so that the defects of the pipeline anticorrosive coating and the cathode protection effect cannot be detected.
At present, no method for evaluating the cathode protection effectiveness of the directional drilling pipeline exists in the industry, and a blind area exists in corrosion control of the directional drilling pipeline, so that related research needs to be carried out, and the cathode protection evaluation and monitoring method of the directional drilling pipeline needs to be researched.
The existing relevant standards of the directional drilling comprise GB50424-2015 oil and gas transmission pipeline crossing engineering construction specification, QSY1477-2012 directional drilling crossing pipeline external coating technical specification and SY/T6968-2013 oil and gas transmission pipeline engineering horizontal directional drilling crossing design specification. However, there are limitations to these several specifications, including: firstly, the average conductivity of the directional drilling section is tested, and the damaged area and the specific cathodic protection effect cannot be known; secondly, the directional drilling pipeline is not suitable for in-service pipelines before being welded with a joint.
The inventor finds that no effective detection means exists for the defects of the anticorrosive coating of the directional drilling-through pipeline in the research process. For a newly built directional drilling pipeline, GB50424-2015 recommends testing the average conductivity of the coating of the pipeline, indirectly evaluating the overall quality of the anticorrosive coating of the directional drilling pipeline, and not determining whether the pipeline has large-area anticorrosive coating damage or peeling; for in-service pipelines, the techniques of ACVG and DCVG are commonly used, but the detection for pipelines with larger burial depth is not applicable. Method for obtaining polarization potential of pipeline by reference electrode the potential measured by placing the reference electrode on the earth surface is the mixed value of polarization potentials of a plurality of damaged points of the anti-corrosion layer on the pipeline, wherein the damaged point nearest to the reference electrode has the largest weight, and the damaged point at a position far away from the reference electrode (directional drilling depth) has a small weight. Therefore, the polarization potential condition of the pipeline anticorrosive coating damage point at the directional drilling depth cannot be accurately reflected by the reference electrode placed on the ground.
The multichannel potential measuring instrument disclosed in patent CN104122307B cannot prevent the separation of the wire from the wire, and is easy to be pulled during use, thereby causing the wire to be separated from the wire, and further affecting the normal measurement of the wire.
Disclosure of Invention
The invention aims to provide polarization potential measuring equipment for directionally drilling a pipeline and a using method thereof, and solves the problems that the conventional polarization potential measuring equipment for directionally drilling the pipeline cannot prevent a lead from falling off and cannot be used for directionally drilling the pipeline to cross a river pipeline when in use.
In order to achieve the purpose, the invention provides the following technical scheme:
a polarization potential measuring device for directionally drilling a pipeline comprises a potential collector, wherein one side of the potential collector is respectively connected with a first wire, a second wire and a third wire, the first wire is connected with the potential collector through a connecting component, and the second wire and the third wire are connected with the potential collector through another connecting component;
the connecting assembly is used for connecting the first wire, the second wire and the third wire with the potential collector;
the other end of the first lead is connected with a computer, the other ends of the second lead and the third lead are connected with a plurality of auxiliary connecting assemblies, each group of auxiliary connecting assemblies is connected with a fourth lead and a fifth lead, and the other ends of the fourth lead and the fifth lead are respectively provided with a reference electrode and a polarization test piece;
and the auxiliary connecting assembly is used for connecting the wire IV and the wire V with the wire II and the wire III.
Furthermore, the connecting assembly comprises a first plug, a sliding block, a spring and a limiting insert block, sliding grooves are formed in two sides of the first plug, the sliding blocks are connected inside the sliding grooves in a sliding mode, the limiting insert block is fixed to one end of the sliding block, the sliding block and the limiting insert block are connected with the sliding grooves in a sliding mode, the spring is fixed to one side, close to the sliding grooves, of the sliding block, and the spring is located inside the sliding grooves;
the electric potential collector is connected with the connecting end of the connecting component and is provided with a slot, the insides of two sides of the slot are provided with limiting jacks, and the limiting insertion blocks are in clearance fit with the limiting jacks.
Furthermore, the auxiliary connecting assembly comprises an auxiliary connecting joint, a second plug, a U-shaped fixing frame and a fixing block, the second plug is inserted into one side of the auxiliary connecting joint, the fixing block is fixed at both ends of the second plug, the U-shaped fixing frame is fixed at both ends of the auxiliary connecting joint close to one side of the second plug, clamping grooves are formed in the U-shaped fixing frame, the U-shaped fixing frame is made of elastic materials, and an inclined plane is formed at one end of the fixing block far away from the second plug;
and a rubber sheet is fixed on one side of the second plug close to the auxiliary joint, and one side of the second plug far away from the auxiliary joint is connected with the fourth lead and the fifth lead.
Furthermore, the surfaces of the fourth wire and the fifth wire are respectively fixedly sleeved with a first fixing sleeve and a second fixing sleeve, the surface of the first fixing sleeve is bolted with a first connecting plate, the bottom of the first connecting plate is provided with a second connecting plate which is bolted with the second fixing sleeve, and the inner part of the first connecting plate is in threaded connection with a connecting screw which is in threaded connection with the second connecting plate.
Furthermore, one side of the first connecting plate, which is close to the second fixing sleeve, is not in contact with the second fixing sleeve, and one side of the second connecting plate, which is close to the first fixing sleeve, is not in contact with the first fixing sleeve.
Furthermore, a display screen is fixedly arranged on the surface of the top of the potential collector.
Furthermore, one side of the display screen is provided with a plurality of control keys, and the control keys are positioned at the top of the potential collector.
Further, the upper end of electric potential collector still is equipped with a protection machanism, protection machanism is used for sheltering from display screen and control button, avoids control button to be touched the influence device by mistake and use when not operating, also plays the effect to the display screen protection.
Furthermore, the protection mechanism comprises a stop plate, a connecting block and a slide rail, the top end of the potential collector is connected with the stop plate in a sliding manner, the stop plate is made of transparent materials, the connecting block used for being connected with the potential collector in a sliding manner is fixed on each of two sides of the stop plate, the slide rail is arranged on each of two sides of the potential collector, the lower end of the connecting block is located in the slide rail, and the connecting block is connected with the slide rail in a sliding manner;
protection machanism still includes fixed plate, first magnetism piece and second magnetism piece, the one end that coupling assembling was kept away from to the fixed plate is fixed with the fixed plate, the inside of fixed plate is fixed with first magnetism piece, the one end that coupling assembling was kept away from to the current potential collector and the position department corresponding with first magnetism piece is fixed with the second magnetism piece, first magnetism piece and second magnetism piece are the magnetism and connect.
The invention is realized by the following steps:
the method comprises the following steps: drilling: drilling deep wells at two sides of the directional drill respectively, wherein the depth of each deep well is at least equal to the buried depth of the pipeline at the deepest part of the directional drill;
step two: placing a polarization test piece: putting a polarization test piece into deep wells on two sides of a directional drill, wherein the depth of the polarization test piece from the ground surface to the buried depth of a pipeline in the deep wells is averagely set;
step three: potential acquisition: acquiring potential signals of the polarization test pieces at different depths in the deep well to obtain potential signals at different depths in the deep well through the polarization test piece and the potential collector, and displaying the signals through a display after the signals are acquired;
step four: collecting polarization potential: the method comprises the steps of collecting potential signals of different depths in a deep well to obtain polarization potential signals of pipelines in the same depths, obtaining the polarization potential of damaged points of an anticorrosive layer of the directional drilling pipeline, and displaying the polarization potential through a display after the signals are collected.
Compared with the prior art, the invention provides polarization potential measuring equipment for directionally drilling a pipeline and a using method thereof, and the polarization potential measuring equipment has the following beneficial effects:
according to the invention, the deep wells are drilled at two sides of the directional drill, the polarization test piece and the reference electrode are placed into the well at different depths, and the polarization potential conditions of the polarization test piece at different depth positions are measured, so that the polarization conditions of carbon steel in different geological soil layers can be simulated and tested, the polarization conditions of the directional drill pipeline at different depths can be reflected, the polarization conditions of the polarization test piece at different depths can be regarded as the polarization conditions of the pipeline at different buried depths of the directional drill, and the polarization potential of the polarization test piece is equal to the polarization potential of a damaged point at the position of the directional drill pipeline with the same depth of the polarization test piece, thereby solving the problem that the conventional directional drill pipeline polarization potential measuring equipment cannot be used for directionally drilling through river pipelines;
according to the invention, through the structural design of the connecting component and the auxiliary connecting component, the device forms a modular connecting mode, so that the device is convenient and quick to mount, dismount, replace and transport, and can not be separated from the potential collector when a wire is pulled, thereby ensuring the normal use of the device and avoiding the influence on measurement caused by the falling of the wire;
according to the invention, through the design of the protection mechanism, the device is protected during the period of no need of operation, and the influence on the use of the device caused by mistaken touch of the control key is effectively reduced.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a schematic view of a connection structure of the connection assembly and the potential collector of the present invention;
FIG. 3 is a cross-sectional view of the construction of the coupling assembly of the present invention;
FIG. 4 is a schematic structural view of a sub-assembly of the present invention;
fig. 5 is a schematic view of the first and second fixing sleeves of the present invention;
fig. 6 is a side view of the first and second fastener sleeves of the present invention in use;
FIG. 7 is a side view of the connection structure of the protection mechanism and the potential collector of the present invention;
fig. 8 is a sectional view of a connecting structure of the guard mechanism and the potential collector of the present invention.
In the figure: 1. a potential collector; 2. a first lead; 3. a second conducting wire; 4. a third lead; 5. a computer; 6. A reference electrode; 7. polarizing the test piece; 8. a first plug; 9. a chute; 10. a slider; 11. a spring; 12. Limiting the inserting block; 13. a slot; 14. limiting the jacks; 15. a secondary connection joint; 16. a second plug; 17. a U-shaped fixing frame; 18. a fixed block; 19. a rubber sheet; 20. conducting wires IV; 21. a fifth lead; 22. fixing a sleeve I; 23. fixing a second sleeve; 24. a first connecting plate; 25. a second connecting plate; 26. a connecting screw; 27. a blocking plate; 28. a fixing plate; 29. a first magnetic block; 30. a second magnetic block; 31. connecting blocks; 32. a slide rail; 33. a display screen; 34. and controlling the keys.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
As shown in fig. 1 to 3, the present invention provides a technical solution: a polarization potential measuring device for directionally drilling a pipeline comprises a potential collector 1, wherein one side of the potential collector 1 is respectively connected with a first lead 2, a second lead 3 and a third lead 4, the first lead 2 is connected with the potential collector 1 through a connecting component, and the second lead 3 and the third lead 4 are connected with the potential collector 1 through another connecting component; the connecting assembly is used for connecting the first wire 2, the second wire 3 and the third wire 4 with the potential collector 1, so that the first wire 2, the second wire 3 and the third wire 4 cannot be separated from the potential collector 1 when being pulled, the normal use of the equipment is further ensured, and the influence on measurement caused by falling of the wires is avoided;
the other end of the first lead 2 is connected with a computer 5, the other ends of the second lead 3 and the third lead 4 are connected with a plurality of auxiliary connecting components, each group of auxiliary connecting components is connected with a fourth lead 20 and a fifth lead 21, and the other ends of the fourth lead 20 and the fifth lead 21 are respectively provided with a reference electrode 6 and a polarization test piece 7; the auxiliary connecting assembly is used for connecting the four lead wires 20 and the five lead wires 21 with the two lead wires 3 and the three lead wires 4; the deep well is drilled at two sides of the directional drill, the polarization test block 7 and the reference electrode 6 are placed at different depths in the well, the polarization potential condition of the polarization test block 7 at different depth positions is measured, the polarization condition of carbon steel in different geological soil layers can be simulated and tested, the polarization condition of the directional drill pipeline at different depths is reflected, the polarization condition of the polarization test block 7 at different depths can be considered as the polarization condition of the pipeline at different buried depths in the directional drill, the polarization potential of the polarization test block 7 is equal to the polarization potential of a damage point at the position of the directional drill pipeline with the same depth as the polarization test block 7, and the problem that the conventional directional drill pipeline polarization potential measuring equipment cannot be used for the directional drill to penetrate through a river pipeline is solved.
Referring to fig. 2-4, the connecting assembly includes a first plug 8, a sliding block 10, a spring 11 and a limiting insert block 12, wherein sliding grooves 9 are formed in both sides of the first plug 8, the sliding block 10 is slidably connected inside the sliding grooves 9, the limiting insert block 12 is fixed at one end of the sliding block 10, the sliding block 10 and the limiting insert block 12 are slidably connected with the sliding grooves 9, the spring 11 is fixed on one side of the sliding block 10 close to the sliding grooves 9, and the spring 11 is located inside the sliding grooves 9; the connecting ends of the potential collector 1 and the connecting component are both provided with slots 13, the insides of both sides of the slots 13 are both provided with limiting jacks 14, and the limiting insertion blocks 12 are in clearance fit with the limiting jacks 14;
to sum up, through the slider 10 of pressing plug 8 both sides, it is inside with slider 10 and the spacing inserted block 12 of both sides get into spout 9 completely, make plug 8 can insert inside 13 slots and link to each other with electric potential collector 1, can extrude spring 11 when slider 10 is to the inside removal of spout 9, insert the back through loosening at plug 8, elastic deformation through spring 11 promotes slider 10 and resets with spacing inserted block 12, spacing inserted block 12 that resets can insert 14 inside completions of spacing jack to plug 8, and then reach the effect fixed to plug 8, guarantee that plug 8 can not appear the condition of separation with electric potential collector 1 when the wire rod receives the pulling.
The auxiliary connecting assembly comprises an auxiliary connecting joint 15, a second plug 16, a U-shaped fixing frame 17 and a fixing block 18, the second plug 16 is inserted into one side of the auxiliary connecting joint 15, the fixing block 18 is fixed at both ends of the second plug 16, the U-shaped fixing frame 17 is fixed at both ends of the auxiliary connecting joint 15 close to one side of the second plug 16, a clamping groove is formed in each U-shaped fixing frame 17, each U-shaped fixing frame 17 is made of elastic materials, and an inclined plane is formed in one end, far away from the second plug 16, of each fixing block 18; a rubber sheet 19 is fixed on one side of the second plug 16 close to the auxiliary joint 15, and one side of the second plug 16 far away from the auxiliary joint 15 is connected with a fourth lead 20 and a fifth lead 21;
in summary, when the second plug 16 is inserted into the auxiliary connector 15 through the inclined planes formed on the fixing blocks 18 at the two ends of the second plug 16, the fixing block 18 extrudes and bends the two U-shaped fixing frames 17 at one side of the secondary joint 15 close to the second plug 16 outwards, after the second plug 16 is inserted into the auxiliary joint 15, the fixing block 18 enters a clamping groove formed in the U-shaped fixing frame 17, thereby leading the U-shaped fixing frame 17 to lose stress, then resetting through the material property of the U-shaped fixing frame 17, leading the U-shaped fixing frame 17 after resetting to limit the fixing block 18, leading the second plug 16 and the auxiliary joint 15 to be unable to separate and complete clamping, after the second plug 16 is inserted into the second sub-connector 15, the rubber sheet 19 is located between the second plug 16 and the second sub-connector 15, the rubber sheet 19 blocks the gap between the secondary joint 15 and the second plug 16, so that the invasion of soil and water is avoided.
Referring to fig. 5 and 6, in order to avoid the mutual winding between the reference electrode 6 and the polarization test piece 7, the surfaces of the wire four 20 and the wire five 21 are fixedly sleeved with a first fixed sleeve 22 and a second fixed sleeve 23 respectively, the surface of the first fixed sleeve 22 is bolted with a first connecting plate 24, the bottom of the first connecting plate 24 is provided with a second connecting plate 25 which is bolted with the second fixed sleeve 23, and the inside of the first connecting plate 24 is in threaded connection with a connecting screw 26 which is in threaded connection with the second connecting plate 25; the first fixing sleeve 22 and the second fixing sleeve 23 can be separated, one side of the connecting plate 24 close to the second fixing sleeve 23 is not contacted with the second fixing sleeve 23, and one side of the connecting plate 25 close to the first fixing sleeve 22 is not contacted with the first fixing sleeve 22.
Referring to fig. 1 and 2, the display screen 33 is fixedly installed on the surface of the top of the potential collector 1 for displaying collected data; the potential collector is used for controlling the potential collector 1 to collect different data, one side of the display screen 33 is provided with a plurality of control keys 34, and the control keys 34 are positioned at the top of the potential collector 1.
Referring to fig. 1 and fig. 7 to 8, the upper end of the potential collector 1 is further equipped with a protection mechanism, and the protection mechanism is used for shielding the display screen 33 and the control keys 34, so as to prevent the control keys 34 from being touched by mistake when not in operation, thereby affecting the use of the device and playing a role in protecting the display screen 33.
The protection mechanism comprises a blocking plate 27, a connecting block 31 and a sliding rail 32, the blocking plate 27 is connected to the top end of the potential collector 1 in a sliding mode, the blocking plate 27 is made of transparent materials, and when the control key 34 is blocked, data displayed by the display screen 33 cannot be checked due to the material characteristics of the blocking plate 27; connecting blocks 31 used for being in sliding connection with the potential collector 1 are fixed on two sides of the blocking plate 27, sliding rails 32 are arranged on two sides of the potential collector 1, the lower end of each connecting block 31 is located inside each sliding rail 32, and each connecting block 31 is in sliding connection with each sliding rail 32; through the structural matching of the connecting block 31 and the sliding rail 32, the blocking plate 27 can slide conveniently and quickly;
the protection mechanism further comprises a fixing plate 28, a first magnetic block 29 and a second magnetic block 30, the fixing plate 28 is fixed to one end, away from the connecting assembly, of the fixing plate 28, the first magnetic block 29 is fixed to the inside of the fixing plate 28, the second magnetic block 30 is fixed to one end, away from the connecting assembly, of the potential collector 1 and corresponds to the first magnetic block 29, the first magnetic block 29 and the second magnetic block 30 are in magnetic connection, and through the fixing of the fixing plate 28 and the blocking plate 27 and the magnetic connection of the first magnetic block 29 and the second magnetic block 30, when the blocking plate 27 protects the control key 34 and the display screen 33, the blocking plate 27 can be effectively prevented from moving, so that the phenomenon of protection failure is caused.
The invention is realized by the following steps:
the method comprises the following steps: drilling: drilling deep wells at two sides of the directional drill respectively, wherein the depth of each deep well is at least equal to the buried depth of the pipeline at the deepest part of the directional drill;
step two: placing a polarization test piece: putting the polarization test block into deep wells on two sides of the directional drill, wherein the depth of the polarization test block from the ground surface to the buried depth of the pipeline in the deep wells is averagely set;
step three: potential acquisition: acquiring potential signals of the polarization test pieces at different depths in the deep well to obtain potential signals at different depths in the deep well through the polarization test piece and the potential collector, and displaying the signals through a display after the signals are acquired;
step four: collecting polarization potential: the method comprises the steps of collecting potential signals of different depths in a deep well to obtain polarization potential signals of pipelines in the same depths, obtaining the polarization potential of damaged points of an anticorrosive layer of the directional drilling pipeline, and displaying the polarization potential through a display after the signals are collected.
The working principle is as follows: when the device is used, the first lead 2, the second lead 3 and the third lead 4 are connected with the potential collector 1 through the connecting assembly, and the fourth lead 20 and the fifth lead 21 are connected with the second lead 3 and the third lead 4 through the auxiliary connecting assembly, so that the purpose of preventing the leads from falling off is achieved;
when the device is used, the blocking plate 27 is moved towards the direction far away from the connecting component, so that the control key 34 blocked by the blocking plate 27 is exposed outside, the potential collector 1 can be operated through the control key 34, the blocking plate 27 is reset during the period of no operation, the control key 34 is blocked, the effect of blocking the control key 34 is achieved, and the phenomenon that the control key 34 is mistakenly touched to cause the use of the device to be influenced is effectively avoided; through the magnetic connection of the first magnetic block 29 and the second magnetic block 30 and the fixation of the fixed plate 28 and the blocking plate 27, the blocking plate 27 is ensured not to move when being subjected to smaller stress during the closing period, so that the occurrence of the phenomenon of protection failure is reduced;
after the equipment is installed, put reference electrode 6 and polarization test block 7 into the deep well, adjust the data that electric potential collector 1 needs to gather through control button 34, data in the deep well is gathered through polarization test block 7, after polarization test block 7 gathered data, polarization test block 7 passes through five 21 of wire and three 4 input electric potential collector 1 of wire with data, after electric potential collector 1 received data, carry out the analysis to data, show through display screen 33, after display screen 33 shows data, electric potential collector 1 can be with data storage and the inside of entering computer 5 through wire 2 input, computer 5 can show data and store once more after receiving data.
It is noted that, herein, relational terms such as first and second, and the like may be 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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a polarization potential measuring equipment for directional drilling pipeline, includes potential collector (1), its characterized in that: one side of the potential collector (1) is connected with a first wire (2), a second wire (3) and a third wire (4) respectively, the first wire (2) is connected with the potential collector (1) through a connecting component, and the second wire (3) and the third wire (4) are connected with the potential collector (1) through another connecting component;
the connecting assembly is used for connecting the first lead (2), the second lead (3) and the third lead (4) with the potential collector (1);
the other end of the first lead (2) is connected with a computer (5), the other ends of the second lead (3) and the third lead (4) are connected with a plurality of auxiliary connecting assemblies, each group of auxiliary connecting assemblies is connected with a fourth lead (20) and a fifth lead (21), and the other ends of the fourth lead (20) and the fifth lead (21) are respectively provided with a reference electrode (6) and a polarization test piece (7);
the auxiliary connecting assembly is used for connecting the wire four (20) and the wire five (21) with the wire two (3) and the wire three (4).
2. A polarization potential measuring apparatus for directional drilling of pipes according to claim 1, wherein: the connecting assembly comprises a first plug (8), a sliding block (10), a spring (11) and a limiting insert block (12), sliding grooves (9) are formed in two sides of the first plug (8), the sliding block (10) is connected to the inner portion of each sliding groove (9) in a sliding mode, the limiting insert block (12) is fixed to one end of each sliding block (10), the sliding blocks (10) and the limiting insert blocks (12) are connected with the sliding grooves (9) in a sliding mode, the spring (11) is fixed to one side, close to the sliding grooves (9), of each sliding block (10), and the spring (11) is located inside each sliding groove (9);
slot (13) have all been seted up with coupling assembling's link in electric potential collector (1), spacing jack (14) have all been seted up to the inside of slot (13) both sides, spacing inserted block (12) are clearance fit with spacing jack (14).
3. A polarization potential measuring apparatus for directional drilling of pipes according to claim 1, wherein: the auxiliary connecting assembly comprises an auxiliary connecting joint (15), a second plug (16), a U-shaped fixing frame (17) and fixing blocks (18), the second plug (16) is inserted into one side of the auxiliary connecting joint (15), the fixing blocks (18) are fixed at two ends of the second plug (16), the U-shaped fixing frame (17) is fixed at two ends of the auxiliary connecting joint (15) close to one side of the second plug (16), clamping grooves are formed in the U-shaped fixing frame (17), the U-shaped fixing frame (17) is made of elastic materials, and an inclined plane is formed at one end, far away from the second plug (16), of each fixing block (18);
and a rubber sheet (19) is fixed on one side of the second plug (16) close to the auxiliary joint (15), and one side of the second plug (16) far away from the auxiliary joint (15) is connected with the fourth lead (20) and the fifth lead (21).
4. A polarization potential measuring apparatus for directional drilling of pipes according to claim 3, wherein: the surface of wire four (20) and wire five (21) is fixed the fixed cover one (22) and fixed cover two (23) of cup jointing respectively, the surface bolt of fixed cover one (22) has connected connecting plate one (24), the bottom of connecting plate one (24) is equipped with connecting plate two (25) with fixed cover two (23) bolt joint, the internal thread of connecting plate one (24) is connected with connecting screw (26) with connecting plate two (25) threaded connection.
5. A polarization potential measuring apparatus for directional drilling of pipes according to claim 4, wherein: one side of the first connecting plate (24) close to the second fixing sleeve (23) is not contacted with the second fixing sleeve (23), and one side of the second connecting plate (25) close to the first fixing sleeve (22) is not contacted with the first fixing sleeve (22).
6. A polarization potential measuring apparatus for directional drilling of pipes according to claim 1, wherein: and a display screen (33) is fixedly arranged on the surface of the top of the potential collector (1).
7. A polarization potential measuring apparatus for directional drilling of pipes according to claim 6, wherein: one side of display screen (33) is equipped with a plurality of control button (34), control button (34) are located the top of electric potential collector (1).
8. A polarization potential measuring apparatus for directional drilling of pipes according to claim 7, wherein: the upper end of electric potential collector (1) still is equipped with a protection machanism, protection machanism is used for sheltering from display screen (33) and control button (34), avoids control button (34) to be touched the influence device by the mistake and uses when not operating, also plays the effect to display screen (33) protection.
9. A polarization potential measuring apparatus for directional drilling of pipes according to claim 8, wherein: the protection mechanism comprises a blocking plate (27), a connecting block (31) and a sliding rail (32), the blocking plate (27) is connected to the top end of the potential collector (1) in a sliding mode, the blocking plate (27) is made of transparent materials, the connecting block (31) used for being connected with the potential collector (1) in a sliding mode is fixed to the two sides of the blocking plate (27), the sliding rail (32) is arranged on the two sides of the potential collector (1), the lower end of the connecting block (31) is located inside the sliding rail (32), and the connecting block (31) is connected with the sliding rail (32) in a sliding mode;
protection machanism still includes fixed plate (28), first magnetism piece (29) and second magnetism piece (30), the one end that coupling assembling was kept away from in fixed plate (28) is fixed with fixed plate (28), the inside of fixed plate (28) is fixed with first magnetism piece (29), the one end that coupling assembling was kept away from in electric potential collector (1) and the position department corresponding with first magnetism piece (29) is fixed with second magnetism piece (30), first magnetism piece (29) and second magnetism piece (30) are connected for magnetism.
10. A use method of polarization potential measuring equipment for directionally drilling a pipeline is characterized by comprising the following steps:
the method comprises the following steps: drilling: drilling deep wells at two sides of the directional drill respectively, wherein the depth of each deep well is at least equal to the buried depth of the pipeline at the deepest part of the directional drill;
step two: placing a polarization test piece: putting a polarization test piece into deep wells on two sides of a directional drill, wherein the depth of the polarization test piece from the ground surface to the buried depth of a pipeline in the deep wells is averagely set;
step three: potential acquisition: acquiring potential signals of the polarization test pieces at different depths in the deep well to obtain potential signals at different depths in the deep well through the polarization test piece and the potential collector, and displaying the signals through a display after the signals are acquired;
step four: collecting polarization potential: the method comprises the steps of collecting potential signals of different depths in a deep well to obtain polarization potential signals of pipelines in the same depths, obtaining the polarization potential of damaged points of an anticorrosive layer of the directional drilling pipeline, and displaying the polarization potential through a display after the signals are collected.
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