Elastic clamp releasing mechanism of wire-line coring drilling tool

Abstract

The utility model discloses an elastic clamping releasing mechanism of a wire-line coring drilling tool, which comprises an outer assembly and an inner assembly arranged in the outer assembly, the inner assembly comprises a salvage spearhead, a spearhead seat, a connecting pipe, an elastic clamping pipe, a releasing assembly, a releasing pipe, a rebound assembly and a sealing cylinder, the salvage spearhead, the spearhead seat, the connecting pipe and the elastic clamping pipe are fixedly connected in sequence through bolts, and the elastic clamping pipe is arranged in the sealing cylinder. An installation opening is formed in the middle of the elastic clamping pipe, an unfreezing assembly is correspondingly installed on the installation opening, an unfreezing pipe is slidably connected to the outer side of one end of the elastic clamping pipe, fixing plates are fixedly connected to the bottoms of the elastic clamping pipe and the unfreezing pipe, a rebounding assembly is installed between the two fixing plates, and the two ends of the rebounding assembly are fixedly connected to the surfaces of the fixing plates correspondingly. And the outer side of the elastic clamping pipe is sleeved with a sealing cylinder. According to the mechanism, through the ingenious design of the inner assembly and the outer assembly, especially the cooperative work of an elastic clamping pipe, an unfreezing assembly and the like in the inner assembly, efficient unfreezing is achieved, the adaptability of a drilling tool to complex stratums is enhanced, smooth drilling operation is ensured, and the efficiency of drilling operation is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of drilling and sampling equipment, specifically relating to a spring-loaded release mechanism for a wireline coring drill. Background Technology

[0002] With the sustained and rapid development of my country's economy, the demand for mineral resource extraction and geological exploration is becoming increasingly urgent. This has not only driven the advancement of drilling technology but also placed higher demands on drilling equipment. Wireline coring drills, as a highly efficient and economical drilling tool, play an irreplaceable role in the exploration and development of mineral resources. However, when coring in complex formations, core tube blockage has become one of the key factors restricting the effectiveness of wireline coring drills.

[0003] The spring-loaded positioning mechanism uses a hinged spring-loaded plate to rotate and retrieve the spring-loaded chuck. During normal drilling, the spring-loaded plate stably holds the inner tube assembly, ensuring smooth drilling. However, in the event of core blockage, the inner tube assembly shifts upwards, and the spring-loaded plate loses its rotation space, easily jamming against the spring-loaded stop head, leading to failed retrieval of the inner tube assembly. This not only increases drilling costs but may also damage drilling equipment and reduce drilling efficiency. Utility Model Content

[0004] This invention provides a spring-loaded release mechanism for a wireline coring drill to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is as follows:

[0006] A spring-loaded and release mechanism for a wireline coring drill includes an outer assembly and an inner assembly installed within the outer assembly. The inner assembly includes a retrieval spearhead, a spearhead seat, a connecting pipe, a spring-loaded tube, a release assembly, a release tube, a rebound assembly, and a sealing cylinder. The retrieval spearhead, spearhead seat, connecting pipe, and spring-loaded tube are sequentially fixedly connected by pins. The spring-loaded tube has four symmetrically arranged mounting ports on its central periphery, and a release assembly is installed on each mounting port. A release tube is slidably connected to the outer side of the spring-loaded tube away from the connecting pipe. Fixed plates I and II are fixedly connected to the bottom inner walls of the spring-loaded tube and the release tube, respectively. A rebound assembly is installed between fixed plates I and II, and both ends of the rebound assembly are fixedly connected to the surfaces of fixed plates I and II, respectively. A sealing cylinder is sleeved on the outer side of the spring-loaded tube.

[0007] The connecting tube, spring-loaded tube, and release tube are all hollow tubes.

[0008] Preferably, the release assembly includes a mounting base, which is sleeved inside the spring clip tube. A support rod is fixedly connected to the surface of the mounting base. Four positioning posts I are symmetrically fixed to the outer side of the support rod. Each of the four positioning posts I is sleeved with a return spring. One end of the return spring is fixedly connected to the outer side of the support rod, and the other end is fixedly connected to a locking block. The locking block is triangular in shape and has a mounting cavity. A positioning post II is fixedly installed on the inner wall of the mounting cavity. The other end of the return spring is sleeved on the positioning post II and fixedly connected to the inner wall of the mounting cavity.

[0009] Preferably, a retaining flange is provided on the outer side of the bottom of the locking block.

[0010] Preferably, a wedge-shaped surface is provided at the top corner of the locking block.

[0011] Preferably, the outer assembly is composed of an outer pipe section, which is formed by a spring-loaded stop and a spring-loaded chamber threadedly connected and forms a limiting step at the spring-loaded stop. The two together form a hollow cylindrical cavity structure, and the locking block abuts against the limiting step.

[0012] Preferably, the rebound assembly includes a housing, a slider is slidably connected inside the housing, a guide rod is fixedly connected to the outer wall of one end of the slider, the guide rod passes through the housing and is slidably connected to the housing, a compression spring is fixedly connected to the other end of the slider, one end of the compression spring is fixedly connected to the outer wall of the slider and the other end is fixedly connected to the inner wall of the housing, a track groove is opened on one side of the slider, the track groove is slidably connected to one end of a connecting rod, and the other end of the connecting rod is rotatably connected to the outer side of the housing away from the guide rod.

[0013] Preferably, a protective shell is detachably connected to the opening of the housing.

[0014] Preferably, two sets of sliding strips are symmetrically fixed on the outer side of the end of the spring-loaded tube away from the connecting tube, and two sets of limiting grooves corresponding to the sliding strips are symmetrically opened on the release tube, and the sliding strips are slidably connected to the limiting grooves.

[0015] Preferably, the unblocking tube has a limit ring threadedly connected to one end near the unblocking assembly, and a threaded connector is provided at the other end.

[0016] This utility model has the following beneficial effects:

[0017] (1) The mechanism achieves efficient unsticking function through the ingenious design of the outer and inner assemblies, especially the cooperation of components such as the spring-loaded tube, unsticking assembly, unsticking tube, and rebound assembly in the inner assembly. This design not only improves the adaptability and stability of the drill bit in complex formations, but also effectively avoids the occurrence of stuck drill accidents, thereby ensuring the smooth progress of drilling operations and improving operational efficiency and safety.

[0018] (2) By detachably connecting the protective shell to the opening of the shell of the rebound component, this design not only provides additional protection for the internal components of the rebound component, preventing damage from impurities and moisture in the external environment, but also facilitates maintenance and replacement of the rebound component when needed.

[0019] (3) By symmetrically fixing two sets of sliding bars on the outer side of the end of the spring-loaded tube away from the connecting tube, this design not only simplifies the structure of the sliding connection and improves the reliability and durability of the connection, but also ensures the precise alignment of the spring-loaded tube and the release tube during operation, thereby effectively improving the ease of operation and efficiency of the spring-loaded release mechanism; at the same time, the cooperation between the sliding bar and the limiting through groove also plays a guiding role, further enhancing the stability and reliability of the mechanism. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal assembly structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the card release component of this utility model for housing the card inlet tube;

[0023] Figure 4 This is a schematic diagram of the connection structure between the slider and the limiting groove of this utility model;

[0024] Figure 5 This is a schematic diagram of the card unlocking component structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the rebound component structure of this utility model.

[0026] In the diagram, 1-spearhead, 2-spearhead seat, 3-connecting pipe, 4-spring-loaded tube, 5-unlocking assembly, 51-mounting base, 52-support rod, 53-positioning post I, 54-reset spring, 55-clamping block, 56-mounting cavity, 57-positioning post II, 58-flange, 59-wedge surface, 6-unlocking tube, 7-rebound assembly, 71-shell, 72-slider, 73-guide rod, 74-compression spring, 75-track groove, 76-connecting rod, 77-protective shell, 8-sealing cylinder, 9-stop, 10-spring-loaded chamber, 11-limiting step, 12-slider, 13-limiting through groove, 14-limiting ring, 15-threaded connector, 16-fixing plate I, 17-pin, 18-mounting port, 19-fixing plate II. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments, but in no way shall the present invention be limited. Any changes or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0028] Figure 1 and Figure 6 This illustration shows an embodiment of the spring-loaded release mechanism of a wireline coring drill according to the present invention.

[0029] A spring-loaded release mechanism for a wireline coring drill bit, as shown in the attached figure. Figures 1 to 3 As shown, the assembly includes an outer assembly and an inner assembly installed within the outer assembly. The inner assembly includes a spearhead 1, a spearhead seat 2, a connecting pipe 3, a spring-loaded retaining tube 4, a release assembly 5, a release tube 6, a rebound assembly 7, and a sealing cylinder 8. The spearhead 1, spearhead seat 2, connecting pipe 3, and spring-loaded retaining tube 4 are sequentially fixedly connected by pins 17. The spring-loaded retaining tube 4 has four symmetrically arranged mounting ports 18 on its central periphery. The release assembly 5 is installed on each mounting port 18 to realize the release function. The release tube 6 is slidably connected to the outer side of the end of the spring-loaded retaining tube 4 away from the connecting pipe 3. The release tube 6 and the spring-loaded retaining tube 7 are connected to the spring-loaded retaining tube 8. The spring-loaded tube 4 works together to achieve the unblocking action; the bottom inner walls of the spring-loaded tube 4 and the unblocking tube 6 are respectively fixedly connected to the fixing plate I 16 and the fixing plate II 19, and a rebound component 7 is installed between the fixing plate I 16 and the fixing plate II 19. The two ends of the rebound component 7 are respectively fixedly connected to the surfaces of the fixing plate I 16 and the fixing plate II 19. The rebound component 7 plays a key role in the unblocking process, providing the necessary elasticity to make the unblocking component 5 separate from the outer assembly to achieve unblocking. A sealing cylinder is sleeved on the outside of the spring-loaded tube 4 to prevent slurry from entering the unblocking tube 6 and causing the rebound component 7 to be blocked.

[0030] The connecting tube 3, the spring-loaded tube 4, and the release tube 6 are all hollow tubes.

[0031] For details, see attached. Figure 5 As shown, the release assembly 5 includes a mounting base 51, which is sleeved inside the spring clip tube 4. A support rod 52 is fixedly connected to the surface of the mounting base 51. Four positioning posts I 53 are symmetrically fixed to the outside of the support rod 52. Each of the four positioning posts I 53 is sleeved with a return spring 54. One end of the return spring 54 is fixedly connected to the outside of the support rod 52, and the other end is fixedly connected to a locking block 55. The locking block 55 is triangular in shape and has a mounting cavity 56. A positioning post II 57 is fixedly installed inside the mounting cavity 56. The other end of the return spring 54 is sleeved on the positioning post II 57 and fixedly connected to the inner wall of the mounting cavity 56.

[0032] Further details are attached. Figure 5 As shown, in order to further prevent the locking block 55 from disengaging from the return spring 54, a retaining flange 58 is provided on the outer side of the bottom of the locking block 55.

[0033] For details, see attached. Figure 1 As shown, the outer assembly is composed of an outer pipe section, which is threadedly connected to a spring-loaded stop 9 and a spring-loaded chamber 10 and forms a limiting step 11 at the spring-loaded stop 9. The two together form a hollow cylindrical cavity structure, and the locking block 55 abuts against the limiting step 11.

[0034] Further details are attached. Figure 5 As shown, in order to better disengage the locking block 55 from the limiting step 11, a wedge-shaped surface 59 is provided at the top corner of the locking block 55.

[0035] For details, see attached. Figure 6 As shown, the rebound assembly 7 includes a housing 71, a slider 72 slidably mounted inside the housing 71, a guide rod 73 fixedly connected to the outer wall of one end of the slider 72, the guide rod 73 passing through the housing 71 and slidably connected to the housing 71, a compression spring 74 fixedly connected to the other end of the slider 72, one end of the compression spring 74 fixedly connected to the outer wall of the slider 72 and the other end fixedly connected to the inner wall of the housing 71, a track groove 75 is provided on one side of the slider 72, the track groove 75 is slidably connected to one end of a connecting rod 76, and the other end of the connecting rod 76 is rotatably connected to the outer side of the housing 71 away from the guide rod 73.

[0036] Further details are attached. Figure 6 As shown, in order to protect the internal components of the rebound assembly 7, a protective shell 77 is detachably connected to the opening of the housing 71.

[0037] Further details are attached. Figure 4 As shown, in order to facilitate the sliding connection between the spring-loaded tube 4 and the release tube 6, two sets of sliding strips 12 are symmetrically fixed on the outer side of the end of the spring-loaded tube 4 away from the connecting tube 3, and the outer side of the release tube 6 is symmetrically provided with limiting grooves 13 corresponding to the sliding strips 12, and the sliding strips 12 and the limiting grooves 13 are slidably connected.

[0038] Further details are attached. Figure 4 As shown, in order to further prevent the spring-loaded tube 4 from detaching from the release tube 6, the release tube 6 is threadedly connected to a limit ring 14 at one end near the release assembly 5, and a threaded connector 15 is provided at the other end. The threaded connector 15 facilitates connection with other components.

[0039] Working principle

[0040] As attached Figures 1 to 6As shown, during normal use, the locking block 55 opens under the action of the return spring 54 and abuts against the limiting step 11 formed by the spring-loaded stop head 9 and the spring-loaded chamber 10, thereby positioning the inner assembly. The retrieval device grabs the retrieval spearhead 1 with the retrieval hook and lifts it upward. At this time, the spearhead seat 2 drives the connecting pipe 3, the spring-loaded pipe 4, and the release pipe 6 to move upward together. Since the locking block 55 has a wedge-shaped surface 59 at the top corner, when the spring-loaded pipe 4 moves upward, it will push the locking block 55 to retract inward and break away from the limitation of the limiting step 11, thus completing the retrieval action. When a blockage or other internal assembly jamming occurs, a downward force is applied to the spearhead 1, which is transmitted to the spring-loaded retaining tube 4 through the spearhead seat 2. The spring-loaded retaining tube 4 acts on the rebound assembly 7 through the bottom fixing plate I 16. At this time, the compression spring 74 on the rebound assembly 7 is compressed, causing the connecting rod 76 to slide along the track groove 75 until the rebound assembly 7 reaches its minimum stroke and the applied force stops. The track groove 75 limits the stroke of the connecting rod 76 and causes the connecting rod 76 to retract into the housing 71. During this process, the release assembly 5 moves downward with the spring-loaded retaining tube 4. When it enters the release tube 6, the return spring 54 is compressed, and the release assembly 5 is housed inside the spring-loaded retaining tube 4. After the applied force stops, the spring-loaded retaining tube 6 is released. The retrieval device grabs the retrieval spearhead 1 and lifts it upwards, achieving the overall lifting of the internal assembly and completing the unblocking. When the unblocking mechanism needs to be used again after unblocking, a downward force is applied to the retrieval spearhead 1, which is transmitted to the rebound assembly 7 through the spearhead seat 2. At this time, the compression spring 74 is compressed again and drives the connecting rod 76 to move upwards until it stops applying force at the minimum stroke of the rebound assembly 7. At this time, the connecting rod 76 releases the stroke limitation of the trajectory groove 75, the spring force of the compression spring 74 is released and acts on the spring-loaded tube 4 through the rebound assembly 7. The unblocking assembly 5 moves upwards with the spring-loaded tube 4 and disengages from the unblocking tube 6. The reset spring 54 resets and drives the locking block 55 to reset, preparing for the next operation.

Claims

1. A spring-loaded release mechanism for a wireline coring drill bit, characterized in that, The assembly includes an outer assembly and an inner assembly installed within the outer assembly. The inner assembly includes a spearhead (1), a spearhead seat (2), a connecting pipe (3), a spring-loaded tube (4), a release assembly (5), a release tube (6), a rebound assembly (7), and a sealing cylinder (8). The spearhead (1), spearhead seat (2), connecting pipe (3), and spring-loaded tube (4) are sequentially fixedly connected by pins (17). The spring-loaded tube (4) has four symmetrically arranged mounting ports (18) on its central periphery. The mounting ports (18) are respectively installed with corresponding components. There is a card release component (5), and a card release component (6) is slidably connected to the outer side of the end of the card release tube (4) away from the connecting tube (3). The inner walls of the bottom of the card release tube (4) and the card release tube (6) are respectively fixedly connected to a fixing plate I (16) and a fixing plate II (19). A rebound component (7) is installed between the fixing plate I (16) and the fixing plate II (19). The two ends of the rebound component (7) are respectively fixedly connected to the surfaces of the fixing plate I (16) and the fixing plate II (19). A sealing cylinder is sleeved on the outer side of the card release tube (4). The connecting tube (3), the spring-loaded tube (4), and the release tube (6) are all hollow tubes.

2. The spring-loaded release mechanism of the wireline coring drill according to claim 1, characterized in that, The release assembly (5) includes a mounting base (51), which is fitted inside the spring clip tube (4). A support rod (52) is fixedly connected to the surface of the mounting base (51). Four positioning posts I (53) are symmetrically fixed on the outside of the support rod (52). Each of the four positioning posts I (53) is fitted with a return spring (54). One end of the return spring (54) is fixedly connected to the outside of the support rod (52), and the other end is fixedly connected to a locking block (55). The locking block (55) is triangular in shape and has an installation cavity (56). A positioning post II (57) is fixedly provided on the inner wall of the installation cavity (56). The other end of the return spring (54) is fitted on the positioning post II (57) and fixedly connected to the inner wall of the installation cavity (56).

3. The spring-loaded release mechanism of the wireline coring drill according to claim 2, characterized in that, The locking block (55) has a retaining flange (58) on its bottom outer side.

4. The spring-loaded release mechanism of the wireline coring drill according to claim 2, characterized in that, A wedge-shaped surface (59) is provided at the top corner of the locking block (55).

5. The spring-loaded release mechanism of the wireline coring drill according to claim 1, characterized in that, The outer assembly is composed of an outer pipe section, which is formed by a spring-loaded stop (9) and a spring-loaded chamber (10) connected by threads and forms a limiting step (11) at the spring-loaded stop (9). The two form a hollow cylindrical cavity structure, and the locking block (55) abuts against the limiting step (11).

6. The spring-loaded release mechanism of the wireline coring drill according to claim 1, characterized in that, The rebound assembly (7) includes a housing (71), a slider (72) is slidably connected inside the housing (71), a guide rod (73) is fixedly connected to the outer wall of one end of the slider (72), the guide rod (73) passes through the housing (71) and is slidably connected to the housing (71), a compression spring (74) is fixedly connected to the other end of the slider (72), one end of the compression spring (74) is fixedly connected to the outer wall of the slider (72), and the other end is fixedly connected to the inner wall of the housing (71), a track groove (75) is provided on one side of the slider (72), the track groove (75) is slidably connected to one end of the connecting rod (76), and the other end of the connecting rod (76) is rotatably connected to the outer side of the housing (71) away from the guide rod (73).

7. The spring-loaded release mechanism of the wireline coring drill according to claim 6, characterized in that, A protective shell (77) is detachably connected to the opening of the housing (71).

8. The spring-loaded release mechanism of the wireline coring drill according to claim 1, characterized in that, Two sets of sliding strips (12) are symmetrically fixed on the outer side of the end of the spring-loaded tube (4) away from the connecting tube (3). Two sets of limiting through grooves (13) corresponding to the sliding strips (12) are symmetrically opened on the release tube (6). The sliding strips (12) and the limiting through grooves (13) are slidably connected.

9. The spring-loaded release mechanism of the wireline coring drill according to claim 8, characterized in that, The card release tube (6) is threaded to a limit ring (14) at one end near the card release assembly (5), and a threaded connector (15) is provided at the other end.

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