Elastic clamp single-action mechanism

Abstract

The utility model relates to an elastic clamp single-acting mechanism which comprises an elastic clamp adjusting screw rod, an elastic clamp adjusting nut, an elastic clamp cavity upper bearing platform, an elastic clamp cavity, an elastic clamp catcher, a spring, an elastic clamp cavity pressure bearing, an elastic clamp cavity lower bearing platform, a rolling bearing, a single-acting cavity upper pressure bearing, a single-acting cavity, a single-acting cavity transmission shaft, a single-acting cavity lower bearing platform and a single-acting cavity lower pressure bearing. The elastic clamp adjusting screw rod is connected with the elastic clamp catcher, and the elastic clamp adjusting nut is arranged on the elastic clamp adjusting screw rod; the upper end of the elastic clamping cavity is connected to the lower end of the drilling tool drill rod variable-diameter connector, and the lower end is connected with the elastic clamping cavity lower bearing platform; the upper end of the elastic clamping cavity lower bearing platform is connected with the lower end of the elastic clamping cavity, and the elastic clamping cavity pressure bearing is arranged at the upper end of the elastic clamping cavity lower bearing platform and located in the elastic clamping cavity. The elastic clamping connector is arranged at the lower end of the elastic clamping cavity lower bearing platform, the single-acting-cavity transmission shaft penetrates through the single-acting-cavity lower bearing platform, and the upper end of the single-acting-cavity lower bearing platform is connected with the lower end of the single-acting cavity. According to the utility model, the timeliness of the single-action mechanism is improved, and the problem of tripping of the inner pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the field of geological engineering and technology, in particular to a spring-clip single-action mechanism. Background Art

[0002] The Qaidam Basin in Qinghai Province is a recognized salt lake resource concentration area in my country. The reserves of potassium, magnesium, sodium, mirabilite, lithium and strontium rank first in the country. The reserves of potassium chloride, magnesium chloride, potassium chloride, etc. account for more than 90% of the country's proven reserves. It is known as Qinghai's advantageous industry and one of Qinghai's four pillar industries.

[0003] However, in recent years, the output has not reached a corresponding scale in the process of continuous expansion of development scale, which also reflects that the previous exploration results cannot meet the requirements of later development investment. According to the current status of Quaternary exploration in the mining areas of Qarhan Salt Lake, Yiliping, East and West Taijinaier in recent years, insufficient coring rate, hole collapse and scrapping, and hydrological wells have become the main problems restricting the quality of salt lake resource exploration and exploration tasks.

[0004] Through follow-up investigation, it was found that in order to avoid dissolution of the salt layer, a pumpless drilling method was adopted during the drilling process. When drilling in formations with plasticity and fluidity characteristics, ordinary single-action double-tube coring drill bits not only have a low coring rate, but also often cause accidents such as silt sedimentation and jamming of the coring tube and coring drill bits during drilling. Utility Model Content

[0005] The utility model provides a spring-cage single-action mechanism to solve the technical problems existing in the background technology. Compared with the traditional single-action double-tube drilling tool, the utility model improves the timeliness of the single-action mechanism and avoids the problem of inner tube disengagement.

[0006] The technical solution of the utility model is: the utility model is a spring-cage single-action mechanism, which is special in that: the spring-cage single-action mechanism includes a spring-cage adjusting screw, a spring-cage adjusting nut, an upper support platform of the spring-cage cavity, a spring-cage cavity, a spring-cage takeover, a spring, a spring-cage cavity pressure bearing, a lower support platform of the spring-cage cavity, a rolling bearing, an upper pressure bearing of the single-action cavity, a single-action cavity, a single-action cavity transmission shaft, a lower support platform of the single-action cavity and a lower pressure bearing of the single-action cavity, the spring-cage adjusting screw is connected with the spring-cage takeover, and the spring-cage adjusting nut is arranged on the spring-cage adjusting screw; the spring-cage cavity is a hollow structure, the upper end of which is connected to the lower end of the drill rod reducer of the drilling tool, and the lower end is connected to the lower support platform of the spring-cage cavity; the interior of the lower support platform of the spring-cage cavity is a hollow structure, the upper end is connected to the lower end of the spring-cage cavity, the pressure bearing of the spring-cage cavity is arranged at the upper end of the lower support platform of the spring-cage cavity, and is located in the spring-cage cavity; the spring-cage takeover is arranged at the lower end of the lower support platform of the spring-cage cavity, It is composed of three parts: upper, middle and lower. The upper part is a connecting shaft, which passes through the ejection card cavity, and the upper end of the connecting shaft is connected to the ejection card adjusting screw. The lower support platform of the ejection card cavity is sleeved in the middle of the ejection card receiver, and the lower end of the lower part of the ejection card receiver is connected to the upper end of the single-acting cavity, and a spring is arranged around the outer side of the connecting shaft; the interior of the upper support platform of the ejection card cavity is a hollow structure, and the ejection card adjusting screw passes through the upper support platform of the ejection card cavity, and the lower end is connected to the upper end of the connecting shaft; the interior of the single-acting cavity is a hollow structure, and the upper end of the single-acting cavity is connected to the lower end of the ejection card receiver; two inner steps are respectively arranged in the middle of the single-acting cavity from top to bottom; the single-acting cavity transmission shaft passes through the single-acting cavity, and the rolling bearing, the upper pressure bearing of the single-acting cavity and the lower pressure shaft of the single-acting cavity are successively sleeved on the single-acting cavity transmission shaft from top to bottom, the interior of the lower support platform of the single-acting cavity is a hollow structure, the single-acting cavity transmission shaft passes through the lower support platform of the single-acting cavity, and the upper end of the lower support platform of the single-acting cavity is connected to the lower end of the single-acting cavity.

[0007] Furthermore, the single-acting cavity transmission shaft is divided into six parts from top to bottom: a locking pin part, a single-acting cavity upper pressure bearing and a rolling bearing insertion part, an upper step load-bearing part, a lower step load-bearing fixed part, a single-acting cavity lower pressure bearing insertion fixed part and a local reverse circulation inner tube connection part. The locking pin part is located at the top of the single-acting cavity transmission shaft, and a thread and a pin hole are provided on the outside of the locking pin part. The rolling bearing is inserted into the single-acting cavity upper pressure bearing and the upper end of the rolling bearing insertion part. The single-acting cavity upper pressure bearing is inserted into the single-acting cavity upper pressure bearing and the rolling bearing At the lower end of the insertion part, the locking pin part is used to fix the pressure bearing and rolling bearing on the single-acting chamber to loosen upward after the fixing nut is inserted; the upper step load-bearing part and the lower step load-bearing fixed part correspond to the positions of the two inner steps in the single-acting chamber, the single-acting chamber lower pressure bearing is inserted into the single-acting chamber lower pressure bearing insertion fixing part, a channel is vertically arranged at the inner center of the local reverse circulation inner pipe connection part, and steel balls are arranged in the channel, and an exhaust hole connected to the channel is horizontally arranged at the upper end of the local reverse circulation inner pipe connection part, and the diameter of the exhaust hole is smaller than the diameter of the steel ball.

[0008] Furthermore, the lower support platform of the spring-cage cavity is an inverted T-shaped structure.

[0009] Furthermore, the upper support platform of the spring-cage cavity is a T-shaped structure.

[0010] Furthermore, the lower support platform of the single-action cavity is an inverted T-shaped structure.

[0011] Furthermore, an oil filling nozzle or an oil filling window is provided at the upper end of the single-action chamber.

[0012] The utility model analyzes the pumping mechanism of the pumpless adapter, the timeliness and effect of the single-action mechanism, the elasticity of the spring-cage mechanism, the principle of the spring-cage seat to prevent the core from falling off, the inner and outer annular spaces between the drill bit and the drill tool, and the adaptability, and designs the spring-cage single-action mechanism item by item. The specific application embodiment of the utility model is composed of 5 sets of mechanisms, namely, the reducer adapter assembly, the outer tube component mechanism, the spring-cage single-action mechanism, the local reverse circulation mechanism, and the core clamping protection mechanism. The reducer assembly includes a reducer, a hole expansion washer, and a drill pipe reducer; the outer tube component includes an outer tube and a drill bit; the spring-cage single-action mechanism includes a spring-cage adjustment screw, a spring-cage adjustment nut, an upper support platform of the spring-cage cavity, a spring-cage cavity, a spring-cage receiver, a spring, a spring-cage cavity pressure bearing, a lower support platform of the spring-cage cavity, a rolling bearing, an upper pressure bearing of the single-action cavity, a single-action cavity, a single-action cavity transmission shaft, a lower support platform of the single-action cavity, and a lower pressure bearing of the single-action cavity; the local reverse circulation mechanism includes a locking nut, an inner tube receiver, a reverse circulation mechanism, and an inner tube; the core clamping protection mechanism includes a retaining spring seat and a telescopic retaining spring. The utility model first connects the spring card single action mechanism, the local reverse circulation mechanism and the inner tube in sequence to form an inner tube assembly; secondly, after the core clamping protection mechanism is installed into the upper end of the inner step of the drill bit, the outer tube and the drill bit are connected to form an outer tube assembly; the inner tube assembly and the outer tube assembly are connected to the reducer assembly to form a complete set of drilling tools, and the installation order of the reducer assembly is as follows: the hole expansion washer is sleeved on the outer ring of the reducer of the drill rod of the drilling tool and then the reducer is connected; finally, the assembled drilling tool is connected to the active drill rod and then vertically hoisted, and the inner tube and the core clamping protection mechanism are observed from below the drill bit. Regarding the contact condition of the protection mechanism, before drilling, the lower end of the inner tube is in the core clamping protection mechanism, and the distance from the telescopic retaining spring is preferably 1.5-2cm. Otherwise, the inner tube assembly gap is corrected by adjusting the spring-cage adjusting screw, and then drilling is started; before lifting the drill, slight pier drilling is performed, that is, the drill bit is raised by 10cm and then quickly lowered to the bottom of the hole, so that the inner tube assembly pushes the telescopic retaining spring of the core clamping protection mechanism to the lower end of the retaining spring seat to restore it to the original curvature. The designed telescopic retaining spring has better strength and curvature than ordinary grabbing springs, which can meet the purpose of retaining spring retaining to clamp the core. The inner tube and the outer tube are standard geological pipes of the same series, and the length can be adjusted according to actual needs. The utility model is matched with conventional drill pipes and drill bits, and is suitable for formations with plasticity and fluidity characteristics in salt lake drilling. Compared with traditional single-action double-tube drilling tools, the spring-cage single-action mechanism designed in the utility model improves the timeliness of the single-action mechanism and avoids the problem of inner tube disengagement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the spring card cavity of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the upper support platform of the spring card cavity of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the spring card adapter of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the lower support platform of the spring-cage cavity of the utility model;

[0018] Figure 6 It is a structural schematic diagram of a single-acting cavity transmission shaft of the utility model;

[0019] Figure 7 It is a structural schematic diagram of a specific application embodiment of the utility model;

[0020] Figure 8 It is a structural schematic diagram of a core clamping protection mechanism of a specific application embodiment of the utility model.

[0021] The following are the descriptions of the reference numerals:

[0022] 1. Spring-clip adjusting screw; 2. Reducer adapter; 3. Hole expansion washer; 4. Reducer adapter for drilling tool and drill pipe; 5. Spring-clip adjusting nut; 6. Upper support platform of spring-clip chamber; 7. Spring-clip chamber; 8. Spring-clip adapter; 9. Spring; 10. Pressure bearing of spring-clip chamber; 11. Lower support platform of spring-clip chamber; 12. Rolling bearing; 13. Upper pressure bearing of single-action chamber; 14. Single-action chamber; 15. Transmission shaft of single-action chamber; 16. Lower support platform of single-action chamber; 17. Lower pressure bearing of single-action chamber; 18. Locking nut; 19. Inner tube adapter; 20. Through screw; 21. Filter locking mechanism; 22. Inner tube; 23. Core clamping protection mechanism; 24. Circlip seat; 25. Inner step of drill bit; 26. Outer tube; 27. Telescopic circlip;

[0023] 15.1, locking pin position; 15.2, single-action chamber upper pressure bearing and rolling bearing sleeve position; 15.3, upper step load-bearing position; 15.4, lower step load-bearing fixed position; 15.5, single-action chamber lower pressure bearing sleeve fixed position; 15.6, local reverse circulation inner pipe connection position; 15.7, channel; 15.8, steel ball;

[0024] 21.1. Filter cup cover; 21.2. Filter cup body;

[0025] 24.1, guide groove; 24.2, steel ring;

[0026] 27.1. Steel ring; 27.2. Reed clip. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] See also Figures 1 to 5 The structure of the specific embodiment of the utility model includes a spring card adjustment screw 1, a spring card adjustment nut 5, a spring card cavity upper support 6, a spring card cavity 7, a spring card takeover 8, a spring 9, a spring card cavity pressure bearing 10, a spring card cavity lower support 11, a rolling bearing 12, a single-action cavity upper pressure bearing 13, a single-action cavity 14, a single-action cavity transmission shaft 15, a single-action cavity lower support 16 and a single-action cavity lower pressure bearing 17. The upper part of the spring card adjustment screw 1 passes through the reducer takeover assembly, and the lower end is connected to the spring card takeover 8. The buckle type of the spring card adjustment nut 5 is consistent with the buckle type of the spring card adjustment screw 1 and is installed on the spring card adjustment screw 1; the spring card cavity 7 is a hollow structure, and the upper and lower The inner sides of both ends are positive thread female buckles, the upper positive thread female buckle is connected to the lower male buckle of the drill rod reducer 4 of the drilling tool, and the lower positive thread female buckle is connected to the lower support platform 11 of the spring card cavity, whose inner diameter is larger than the outer diameter of the spring 9; the inner diameter of the drill rod reducer 4 of the drilling tool is larger than the outer diameter of the upper end of the spring card connector 8, the lower support platform 11 of the spring card cavity is an inverted T-shaped structure with a hollow structure inside, and the outer side of the upper end is a positive thread male buckle, which is connected to the positive thread female buckle at the lower end of the spring card cavity 7, and the outer diameter of the lower end is consistent with the outer diameter of the spring card cavity 7. The inner diameter of the lower support platform 11 of the spring card cavity is larger than the outer diameter of the upper connecting shaft of the spring card connector 8 and smaller than the inner diameter of the spring 9 and the inner diameter of the spring card cavity pressure bearing 10. The spring card cavity pressure bearing 10 is arranged on the spring card cavity. The upper end of the lower support platform 11 of the card cavity is located in the card cavity 7; the card receiving handle 8 is installed at the lower end of the lower support platform 11 of the card cavity, and is divided into three parts: upper, middle and lower. The upper part is a connecting shaft, which runs through the card cavity 7, and the outer diameter is smaller than the inner diameter of the spring 9. The upper end is provided with a positive thread female buckle, which is connected to the card adjustment screw 1. The spring 9 is arranged around the outside of the connecting shaft, and the outer diameter of the middle part is consistent with the outer diameter of the lower support platform 11 of the card cavity. The inner side of the lower end of the lower part is a positive thread male buckle, which is connected to the upper end of the single-action cavity 14; the upper support platform 6 of the card cavity is a T-shaped structure, and the interior is a hollow structure. The inner diameter is larger than the outer diameter of the card adjustment screw 1, the outer diameter of the upper end is smaller than the inner diameter of the card cavity 7, and the lower end is provided with a positive thread female buckle. The outer diameter is smaller than the inner diameter of the spring 9; the spring 9 is stuck between the upper support platform 6 of the spring card chamber and the lower support platform 11 of the spring card chamber, the spring card adjustment screw 1 passes through the upper support platform 6 of the spring card chamber, and the outer thread of the lower end is connected with the positive thread female buckle on the inner side of the upper end of the connecting shaft; the single-action chamber 14 is a hollow structure inside, the outer diameter is smaller than the outer diameter of the spring card chamber 7, and both the upper and lower ends are positive thread female buckles. The single-action chamber 14 is provided with two inner steps from top to bottom, and the inner diameter and height of the two inner steps correspond to the two outer steps of the single-action chamber transmission shaft 15, so as to achieve the purpose of straightening and preventing the single-action chamber transmission shaft 15 from moving up and down. An oiling nozzle or oiling window is provided below the upper thread of the single-action chamber 14;

[0029] See also Figure 6The structure of the specific embodiment of the single-acting cavity transmission shaft 15 of the utility model is divided into six parts from top to bottom: a locking pin part 15.1 (this part is provided with a positive thread male buckle and a through hole is dug horizontally for installing a locking nut and connecting and fixing with the lower end of the spring card adapter), a single-acting cavity upper pressure bearing and rolling bearing sleeve part 15.2 (the outer diameter of this part is equal to the inner diameter of the single-acting cavity upper pressure bearing 13 and the rolling bearing 12, the rolling bearing 12 is sleeved into the upper end of the single-acting cavity upper pressure bearing and rolling bearing sleeve part, and the single-acting cavity upper pressure bearing 13 is sleeved into the lower end of the single-acting cavity upper pressure bearing and rolling bearing sleeve part), an upper step load-bearing part 15.3, and a lower step load-bearing fixed part 15.4 (the upper step load-bearing part 15.3, the lower step load-bearing fixed part 15.4 and the two inner steps in the single-acting cavity 14 are located The single-acting chamber lower pressure bearing is sleeved into the fixed part 15.5 (the outer diameter of this part is equal to the inner diameter of the single-acting chamber lower pressure bearing 17, and the single-acting chamber lower pressure bearing 17 is sleeved into the single-acting chamber lower pressure bearing sleeved into the fixed part 15.5), the local reverse circulation inner tube connection part 15.6 (this part is the key part connecting the inner tube handle 19 and the local reverse circulation mechanism, with a positive thread male buckle on the outside, and a hole 15.7 vertically arranged at the center of the inside, and a steel ball is arranged in the hole 15.7. An exhaust hole connected to the hole 15.7 is arranged horizontally at the upper end of the local reverse circulation inner tube connection part, and the exhaust hole diameter is smaller than the steel ball diameter); the single-acting chamber lower support 16 is an inverted T-shaped structure with a hollow structure inside, passing through the lower end of the single-acting chamber transmission shaft 15, and the positive thread male buckle on the upper end is connected to the lower end of the single-acting chamber 14.

[0030] See also Figure 7 The structure of the specific application embodiment of the utility model includes a reducer assembly, a spring card single-action mechanism, a local reverse circulation mechanism, a core clamping protection mechanism and an outer tube 26. The reducer assembly, the spring card single-action mechanism and the local reverse circulation mechanism are arranged in the outer tube from top to bottom. The reducer assembly includes a reducer 2, a hole expansion washer 3 and a drill rod reducer 4. The reducer 2 is a hollow structure inside, and the inner side of the upper end is a positive thread female buckle. The outer diameter of the upper end is consistent with the outer diameter of the outer tube 26. 2, the outer diameter of the middle position is smaller than the inner diameter of the expansion washer 3, the length is consistent with the height of the expansion washer 3, the outer side of the lower end is a positive thread male buckle, and the buckle type is consistent with the female buckle at the upper end of the drill pipe reducer 4; the expansion washer 3 is a hollow structure inside, which is arranged around the middle position of the reducer 2, and the outer diameter is consistent with the outer diameter of the outer tube 21. The expansion washer 3 is vertically evenly arranged with 4 alloy blocks, which are inserted into the middle position of the drill pipe reducer 4 for the purpose of expanding the hole and straightening. The expansion washer 3 is located on the outer side of the upper end of the outer tube 16. The drill pipe reducer 4 is a hollow structure, and a positive thread female buckle is provided on the inner side of the upper end to connect to the lower end of the reducer 2, and the outer diameter of the upper end is consistent with the outer diameter of the outer tube 26. The outer side of the lower end is a positive thread male buckle, which is connected to the spring card single-action mechanism.

[0031] The local reverse circulation mechanism includes a locking nut 18, an inner tube adapter 19, a filter locking mechanism 21 and an inner tube 22; the locking nut 18 is composed of a nut and a stop washer, and is installed on the positive thread male buckle on the outer side of the lower end of the single-acting cavity transmission shaft 15, and is used to adjust the gap of the inner tube 22; the inner tube adapter 19 is a T-shaped structure, with a hollow structure inside, and a positive thread female buckle is provided on the inside, which is connected to the positive thread male buckle on the outer side of the lower end of the single-acting cavity transmission shaft 15, located below the locking nut 18, and a positive thread male buckle is provided on the outer side of the lower end of the inner tube adapter 19, which is used to connect the inner tube 22; The filter locking mechanism 21 includes a through screw 20, a filter cup cover 21.1, a filter cup body 21.2 and a filter, which mainly filters gravel to prevent gravel from clogging the exhaust hole; the through screw 20 is hollow inside, the inner diameter is smaller than the diameter of the steel ball, and the outer side is all positive thread male buckles, the buckle type is consistent with the inner female buckle of the lower end of the single-action cavity transmission shaft 15, and is connected to the lower end of the single-action cavity transmission shaft 15; the outer diameter of the filter cup body 21.2 is smaller than the inner diameter of the inner tube 22, the interior is hollowed out, and the outer side is provided with a positive thread female buckle, the depth is The filter cup cover 21.1 is half the thickness of the filter cup body 21.2. The bottom of the filter cup body 21.2 is flat and has a concentric water hole. The diameter of the water hole is half the inner diameter of the filter cup body 21.2. The outer diameter of the filter cup cover 21.1 is consistent with the inner diameter of the filter cup body 21.2. The inner side of the filter cup cover 21.1 is all positive thread male buckles (the buckle type is consistent with the positive thread female buckle on the outer side of the cup body). The filter cup body 21.2 is set in the filter cup cover 21.1 and is connected to the filter cup cover 21.1 threaded. The center of the filter cup cover 21.1 A concentric water hole is provided axially, and the inner diameter of the water hole is consistent with the outer diameter of the through screw 20. A positive thread female buckle is provided on the inner side of the water hole to connect with the positive thread male buckle on the outer side of the through screw 20. The fineness of the filter screen is determined according to the sand content of the water in the borehole and the solid content of the mud. Generally, 160 mesh or 200 mesh is selected. The diameter of the filter screen is consistent with the inner diameter of the filter cup body 21.2 and is installed between the filter cup body 21.2 and the filter cup cover 21.1. The inner tube 22 adopts a conventional inner tube, the upper end of which is connected to the inner tube handle 16, and the lower end is connected to the core clamping protection mechanism.

[0032] See also Figure 8 The structure of the core clamping protection mechanism of the specific application embodiment of the utility model includes a clamping spring seat 24 and a telescopic clamping spring 27. When coring (single-tube pier drilling, that is, the main winch brake is released after the drill tool is pulled up 10 cm from the bottom of the hole to make the drill tool fall freely), the spring mechanism and the lower structure are elastically pushed down as a whole, pushing the telescopic clamping spring 27 to move down to clamp the core, and the clamping spring piece shrinks like a grab to prevent the core from falling off;

[0033] The spring seat 24 is cylindrical, and can be specifically made of a steel pipe. Its outer diameter is slightly smaller than the inner diameter of the drill bit rigid body, and its height is about 12 cm. Its structure is lantern-shaped, and it is divided into three parts from top to bottom, that is, the upper part is about 3 cm high, and the inner diameter is slightly larger than the outer diameter of the inner tube 22. During normal drilling, the lower end of the inner tube 22 is located in the upper part of the spring seat 24; the inner diameter of the middle part is slightly larger than the outer diameter of the inner tube 22, the height is about 5 cm, and it is evenly distributed vertically along the steel pipe wall, and guide grooves 24.1 are opened downward (with a width of about 1 cm and open inside and outside walls). The number and layout of the guide grooves 24.1 are consistent with those of the spring sheet 27.2; the inner diameter of the lower part is consistent with the inner diameter of the inner tube 22, and a steel ring 24.2 is arranged on the inner side of the lower end guide (the lower end of the guide groove 24.1); the telescopic spring 27 includes a steel ring 27.1 The inner diameter of the steel ring 27.1 is larger than the inner diameter of the inner tube 22, the outer diameter is smaller than the inner diameter of the upper part of the spring seat 24, and the height is about 1 cm; the outer wall of the steel ring 27.1 is provided with a slot (the depth is consistent with the thickness of the spring 27.2, the opening position is consistent with the position of the guide groove 24.1, the width is 8 mm, and the upper end of the spring 27.2 is embedded in the slot of the steel ring 27.1. The spring plate is a spring plate with an arc, and a through hole is set in the middle of the slot. The upper end of the spring 27.2 is embedded in the slot of the steel ring 27.1, and is connected with the slot through the steel ring rivet and the through hole. The length is greater than 7 cm, the thickness is 0.7 mm, and the width is 8 mm. The spring plate 27.2 can slide up and down along the guide groove 24.1, and the lower end extends outside the steel ring 24.2.

[0034] When installing the utility model, first install the single-acting mechanism, install the rolling bearing 12 on the single-acting cavity transmission shaft 15 from top to bottom, install the single-acting cavity transmission shaft 15 with the rolling bearing 12 installed into the single-acting cavity 14 from top to bottom, install the single-acting cavity upper pressure bearing 13 into the single-acting cavity 14 from bottom to top, lock the pressure bearing top screw after the single-acting cavity upper pressure bearing 13 is in place, penetrate the single-acting cavity lower pressure bearing 17 from bottom to top to the lower step load-bearing fixed position 15.4 of the single-acting cavity transmission shaft 15, connect the single-acting cavity lower support platform 16 to the lower end of the single-acting cavity 14, and lock the upper end of the single-acting cavity transmission shaft 15 with a locking nut. At this time, the single-acting mechanism has been installed (pay attention to observe whether the exhaust hole of the single-acting cavity transmission shaft 15 below the single-acting cavity lower support platform 16 is exposed. If exposed, the installation is normal, otherwise adjust it).

[0035] Secondly, install the local reverse circulation mechanism at the lower end of the single-acting chamber 14, rotate the locking nut 18 to the hollow top below the single-acting chamber transmission shaft 15, install and screw the inner tube adapter 19 to the lower end of the locking nut 18, install the through-core screw 20 to the lowest part of the single-acting chamber transmission shaft 15, put the filter into the filter cup body 21.2, tighten the filter cup cover 21.1 onto the filter cup body 21.2 to lock the filter, install the through-core screw 20 on the upper end of the filter cup cover 21.1, connect the inner tube 22 to the inner tube adapter 19, and the local reverse circulation mechanism is installed.

[0036] Then install the spring-cage mechanism at the upper end of the single-action mechanism, connect the male buckle at the lower end of the spring-cage receiver 8 to the female buckle at the upper end of the single-action chamber 14, insert the lower support platform 11 of the spring-cage chamber into the column of the spring-cage receiver 8, and thread the spring-cage chamber 7 to the lower support platform 11 of the spring-cage chamber. Then, install the spring-cage chamber pressure bearing 10 and the spring 9 into the spring-cage chamber 7 respectively, buckle the upper support platform 6 of the spring-cage chamber into the spring-cage chamber 7, press the upper support platform 6 of the spring-cage chamber to expose the top of the spring-cage receiver 8 to the top of the upper support platform 6 of the spring-cage chamber, install the spring-cage adjusting screw 1 to the top of the spring-cage receiver 8 (the thread should be tightened), install the spring-cage adjusting nut 5 to the spring-cage adjusting screw 1, and push it to the top of the upper support platform 6 of the spring-cage chamber, and then the spring-cage mechanism is installed;

[0037] After the drill pipe reducer 4 is passed through the spring-cage adjusting screw 1 and connected to the upper end of the spring-cage cavity 7, the reducer 2 is passed through the reaming gasket 3 and the spring-cage adjusting screw 1 and connected to the upper end of the drill pipe reducer 4, the reducer assembly is installed, and the inner tube assembly is installed as a whole;

[0038] The next step is to install the core clamping mechanism. After fixing the core clamping mechanism 24 to the inner step 25 of the drill bit, the outer tube 26 is connected, the outer tube 26 is inserted into the inner tube assembly, and the upper end of the outer tube 26 is connected to the outer diameter male buckle of the drill pipe reducer 4 of the drill tool. The installation of the local reverse circulation single-action double-tube drilling tool is completed.

[0039] During normal drilling, the inner tube 22 in the core clamping protection mechanism 23 needs to be about 1.5-2 cm away from the upper end of the clamping spring (the spacing is adjusted by the locking nut 18 and the spring-adjusting nut 5); when lifting the drill, a slight piercing is performed, that is, the drill tool is raised by 10 cm and then quickly lowered to the bottom of the hole, so that the inner tube assembly pushes the telescopic clamping spring 27 of the core clamping protection mechanism along the guide groove 24.1 to the lower end of the clamping spring seat 24, and the clamping spring sheet returns to its original curvature, further reducing the inner diameter of the bottom of the drill bit, which plays a role in clamping and preventing the core from falling off.

[0040] The use process of the utility model is as follows:

[0041] First, the ejection single-action mechanism, the local reverse circulation mechanism and the inner tube 22 are sequentially connected to form an inner tube assembly;

[0042] Secondly, after the core clamping protection mechanism is installed into the upper end of the inner step of the drill bit, the outer tube 26 and the drill bit are connected to form an outer tube assembly;

[0043] Then the inner tube assembly and the outer tube assembly are connected to the drill pipe reducer to form a complete set of drilling tools. The installation order of the reducer assembly is as follows: the expansion gasket 3 is put on the outer ring of the drill pipe reducer 4 and then connected to the reducer 2;

[0044] Finally, the assembled drilling tool is connected to the active drill pipe and lifted vertically. The contact between the inner tube 22 and the core clamping protection mechanism 23 is observed from below the drill bit. Before drilling, the lower end of the inner tube 22 is in the core clamping protection mechanism 23, and the distance from the telescopic clamp spring is 1.5-2cm. Otherwise, the inner tube assembly gap is corrected by adjusting the spring clamp adjusting screw 1 (the spacing is adjusted by the locking nut 18 and the spring clamp adjusting nut 5). After correction, it can be used for drilling;

[0045] Before lifting the drill, perform slight pier drilling, that is, pull the drill bit up 10 cm and then quickly lower it to the bottom of the hole, so that the inner tube assembly pushes the telescopic retaining spring of the core clamping protection mechanism 23 to the lower end of the retaining spring seat 24 to restore it to the original curvature. The designed telescopic retaining spring has better strength and curvature than ordinary grabbing springs, which can meet the purpose of retaining spring clamping the core.

[0046] During normal drilling, the core enters the inner tube 22 from bottom to top, and the gas in the inner tube 22 is discharged to the middle channel 15.7 of the local reverse circulation inner tube connection part 15.6 along the hollow hole of the filter cup body 21.2, the filter cup cover 21.1, and the through screw 20. As the internal pressure of the inner tube 22 increases, the steel ball 15.8 is pushed to the top of the channel 15.7 by the air pressure, and the gas is discharged to the outside of the inner tube assembly along the horizontal exhaust hole at the upper end of the local reverse circulation inner tube connection part 15.6, so as to avoid the core being not drilled due to air blockage. The problem of the core entering the inner tube 22; when the drill is lifted, the core stops entering the inner tube 22. At this time, the steel ball 15.8 is affected by gravity and falls to the top of the through-hole 15.7 along the middle screw 20. When the drill is lifted, the steel ball 15.8 blocks the upper end of the exhaust hole of the through-hole 20, and the air cannot be sucked into the inner tube 22. There is a negative pressure area at the top of the inner tube 22, which avoids the problem of the core falling. At the same time, a filter is set in the filter locking mechanism 21. During the drilling process, the problem of blockage of the channel 15.7 caused by sand and gravel entering the exhaust hole is avoided.

[0047] The technical contents not specifically described in the present utility model and the above embodiments are the same as the prior art.

[0048] The above are only specific implementation methods disclosed in the present utility model, but the protection scope of the present utility model is not limited thereto. The protection scope of the present utility model shall be based on the protection scope of the claims.

Claims

1. A single-action ejection mechanism, characterized in that: The single-action mechanism of the ejection card includes an ejection card adjustment screw, an ejection card adjustment nut, an upper support platform of the ejection card chamber, an ejection card chamber, an ejection card receiver, a spring, a pressure bearing of the ejection card chamber, a lower support platform of the ejection card chamber, a rolling bearing, an upper pressure bearing of the single-action chamber, a single-action chamber, a single-action chamber transmission shaft, a lower support platform of the single-action chamber and a lower pressure bearing of the single-action chamber. The ejection card adjustment screw is connected to the ejection card receiver, and the ejection card adjustment nut is arranged on the ejection card adjustment screw; the ejection card chamber is a hollow structure, the upper end is connected to the lower end of the drill rod reducer of the drilling tool, and the lower end is connected to the lower support platform of the ejection card chamber; the interior of the lower support platform of the ejection card chamber is a hollow structure, the upper end is connected to the lower end of the ejection card chamber, the pressure bearing of the ejection card chamber is arranged on the upper end of the lower support platform of the ejection card chamber, and is located in the ejection card chamber; the ejection card receiver is arranged at the lower end of the lower support platform of the ejection card chamber, and is divided into three parts: upper, middle and lower. The upper part is a connecting shaft, and the connecting shaft passes through the ejection card chamber. The card cavity, the upper end of the connecting shaft is connected with the spring card adjusting screw, the lower support platform of the spring card cavity is sleeved in the middle of the spring card receiver, the lower end of the lower part of the spring card receiver is connected with the upper end of the single-acting cavity, and the spring is arranged around the outside of the connecting shaft; the interior of the upper support platform of the spring card cavity is a hollow structure, the spring card adjusting screw passes through the upper support platform of the spring card cavity, and the lower end is connected with the upper end of the connecting shaft; the interior of the single-acting cavity is a hollow structure, the upper end of the single-acting cavity is connected with the lower end of the spring card receiver; two inner steps are respectively arranged in the middle part of the single-acting cavity from top to bottom; the single-acting cavity transmission shaft passes through the single-acting cavity, and the rolling bearing, the upper pressure bearing of the single-acting cavity and the lower pressure shaft of the single-acting cavity are sequentially sleeved on the single-acting cavity transmission shaft from top to bottom, the interior of the lower support platform of the single-acting cavity is a hollow structure, the single-acting cavity transmission shaft passes through the lower support platform of the single-acting cavity, and the upper end of the lower support platform of the single-acting cavity is connected with the lower end of the single-acting cavity.

2. The single-action ejection mechanism according to claim 1, characterized in that: The single-acting cavity transmission shaft is divided into six parts from top to bottom: a locking latch part, a single-acting cavity upper pressure bearing and a rolling bearing insertion part, an upper step load-bearing part, a lower step load-bearing fixed part, a single-acting cavity lower pressure bearing insertion fixed part and a local reverse circulation inner tube connection part. The locking latch part is located at the top of the single-acting cavity transmission shaft, and a thread and a latch hole are arranged on the outside of the locking latch part. The rolling bearing is inserted into the upper end of the single-acting cavity upper pressure bearing and the rolling bearing insertion part. The single-acting cavity upper pressure bearing is inserted into the single-acting cavity upper pressure bearing and the rolling bearing insertion part. At the lower end, the locking pin portion is used to fix the pressure bearing and rolling bearing on the single-acting chamber to loosen upward after the fixing nut is inserted into the locking pin portion; the upper step load-bearing portion and the lower step load-bearing fixed portion correspond to the positions of the two inner steps in the single-acting chamber, and the single-acting chamber lower pressure bearing is inserted into the single-acting chamber lower pressure bearing inserted into the fixing portion, a hole is vertically arranged at the inner center of the local reverse circulation inner tube connection portion, and a steel ball is arranged in the hole, and an exhaust hole connected to the hole is horizontally arranged at the upper end of the local reverse circulation inner tube connection portion, and the diameter of the exhaust hole is smaller than the diameter of the steel ball.

3. The single-action ejection mechanism according to claim 2, characterized in that: The lower support platform of the spring-cage cavity is an inverted T-shaped structure.

4. The single-action ejection mechanism according to claim 3, characterized in that: The upper support platform of the spring-cage cavity is a T-shaped structure.

5. The single-action ejection mechanism according to claim 4, characterized in that: The lower support platform of the single-action cavity is an inverted T-shaped structure.

6. The single-action ejection mechanism according to any one of claims 1 to 5, characterized in that: An oil injection nozzle or an oil injection window is arranged at the upper end of the single-action chamber.

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