Portable downhole string quick disconnect device

Abstract

The present application relates to portable downhole column quick dismounting device, including dismounting mechanism, auxiliary mechanism and quick release connecting mechanism, dismounting mechanism includes multiple connecting blocks, straight connecting rod, inclined pull rod, jack and ratchet assembly, the middle of upper and lower two inclined pull rods forms parallel space reserved for installing jack, the tail of jack is connected with connecting block through quick release connecting mechanism, jack cylinder passes through parallel space formed by upper and lower inclined pull rods, the free end of jack push rod is pinned on ratchet assembly through pin shaft mechanism, four jacks are sequentially fixedly connected to form annular telescopic structure, and the ratchet assembly is pulled and stretched to realize the screwing or dismounting of guide sleeve through the telescoping of four jacks simultaneously. The present application has the advantages of ingenious design, simple structure, dismounting, easy downhole maintenance operation, high work efficiency, quick removal of safety hazards, safe downhole operation, improved economic benefits of enterprises, good market prospect and development space for existing technology.

Description

Technical Field

[0001] This invention relates to the technical field of auxiliary equipment for guide sleeves of hydraulic support columns in mines, and in particular to a portable quick assembly and disassembly device for underground columns. Background Technology

[0002] With the widespread adoption and use of integrated mechanized mining technology, hydraulic supports have become an indispensable piece of mechanical equipment in underground coal mining faces, building a safety barrier for coal miners. However, the main supporting component of hydraulic supports—the column, such as the commonly used threaded column guide sleeve—becomes difficult to unscrew manually after a period of use due to pressure and corrosion. This causes great inconvenience for underground maintenance, especially for large-diameter columns, which often can only be repaired by going to the surface. However, this method is not suitable for minor or urgent issues such as static seal leakage of the guide sleeve, which not only affects production efficiency but also poses safety hazards to equipment and related operators.

[0003] The current problem to be solved is how to design a portable downhole support quick-assembly and disassembly device that is ingeniously designed, simple in structure, detachable, facilitates downhole maintenance operations, improves work efficiency, quickly eliminates safety hazards, ensures downhole operation safety, and improves the economic benefits of enterprises. Summary of the Invention

[0004] To address the challenge of manually unscrewing existing threaded column guide sleeves under pressure and corrosion, and the potential adverse effects such as reduced hydraulic support efficiency and safety hazards to equipment and personnel, this invention provides a portable downhole column quick-release device. This device features a clever design, simple structure, and is detachable, enabling improved efficiency in downhole maintenance, rapid elimination of safety hazards, and enhanced safety in downhole operations, ultimately improving the economic benefits for businesses.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a portable downhole column quick-release and assembly device, including a disassembly and assembly mechanism, an auxiliary mechanism and a quick-release connection mechanism. The disassembly and assembly mechanism includes a connecting block, a straight connecting rod, a diagonal tie rod, a jack and a ratchet assembly for fitting onto the end face of the guide sleeve. The number of the connecting block, the straight connecting rod and the jack are four in each case. The connecting block is L-shaped with equal side length and three horizontal grooves are provided on each of the two sides of the connecting block. Through holes are provided at the upper and lower ends of the grooves. The straight connecting rod is also provided with reserved holes at both ends. The two ends of the straight connecting rod are fixed together with two adjacent L-shaped connecting blocks through the quick-release connection mechanism fixed in the reserved holes, forming a square rigid support frame. The number of diagonal tie rods is four sets, one at the top and one at the bottom of each set. One end of each diagonal tie rod is fixed to the near end through hole of one side of the connecting block through a quick-release connection mechanism, and the other end is fixed to the far end through hole of the other side of the adjacent connecting block through a quick-release connection mechanism, forming a right-angled triangular stable support structure. A parallel space is reserved between the top and bottom diagonal tie rods for installing jacks. The tail of the jack is connected to the connecting block through a quick-release connection mechanism. The jack cylinder passes through the parallel space formed by the top and bottom diagonal tie rods. The free end of the jack push rod is pinned to the ratchet assembly through a pin mechanism. The four jacks are fixedly connected in sequence to form a ring telescopic structure. The guide sleeve is tightened or disassembled by simultaneously extending and retracting the ratchet assembly with the four jacks.

[0006] As a further optimization of the aforementioned portable downhole column quick assembly and disassembly device, the ratchet assembly includes two semi-circular ratchet units, a connecting plate, and a fixing bolt. The ends of the two ratchet units and the connecting plate are provided with reserved holes for installing the fixing bolt. The two semi-circular ratchet units are fixedly connected by the fixing bolt to form a hollow annular structure. The hollow part is an octagonal shape that matches the shape of the guide sleeve end face.

[0007] As a further optimization of the aforementioned portable downhole column quick-assembly and disassembly device, the pushing direction of the jack push rod is externally tangent to the circumferential motion trajectory of the ratchet assembly to ensure maximum torque output.

[0008] As a further optimization of the aforementioned portable downhole column quick-assembly and disassembly device, the installation position of the inclined tie rod is parallel to the jack push rod's pushing axis to increase the overall stability of the mechanism.

[0009] As a further optimization of the aforementioned portable downhole column quick-assembly and disassembly device, the auxiliary mechanism includes a guide ring, an inner liner, and guide connecting rods. There are four guide connecting rods in total. The upper and lower ends of the guide connecting rods are fixed to the guide ring and the connecting block by bolts, respectively, forming an isosceles trapezoidal structure with the lower disassembly and assembly mechanism. The guide ring is a two-semi-circular ring structure, which is connected to form a circular ring by bolts. The inner liner is set inside the guide ring and is made of flexible material with lubricating oil applied to the surface to avoid damage to the guide sleeve piston rod during sliding.

[0010] As a further optimization of the aforementioned portable downhole column quick-assembly and disassembly device, the four jacks are connected in parallel via a synchronization valve to enable the four jacks to extend and retract synchronously.

[0011] As a further optimization of the aforementioned portable downhole column quick-release device, the quick-release connection mechanism includes a high-strength pin, a U-shaped bracket, and a U-shaped clip.

[0012] As a further optimization of the aforementioned portable downhole column quick assembly and disassembly device, a return spring is provided in the space of each upper and lower inclined tie rod. One end of the return spring is fixed to the outer wall of the cylinder of the jack, and the other end is fixed to the middle position of the adjacent straight connecting rod, so that the jack push rod automatically engages with the ratchet groove when it is retracted.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This invention comprises a disassembly and assembly mechanism, an auxiliary mechanism, and a quick-release connection mechanism. Based on the shape of the threaded column guide sleeve commonly used in production, the position of the piston rod, and the actual downhole operating environment, a portable downhole column quick-disassembly and assembly device is creatively proposed. Utilizing the extension and retraction of four unidirectional jack pushing shafts, a ratchet assembly is controlled to screw the guide sleeve in or out, facilitating disassembly and assembly. The diagonal tie rod is parallel to the pushing axis, increasing the overall strength and stability of the mechanism. Simultaneously, the diagonal tie rod supports, guides, and protects the operator's safety during the jack's pushing and retracting processes. The auxiliary mechanism ensures that the center of rotation of the disassembly and assembly mechanism coincides with the piston rod axis, while also guaranteeing that the disassembly and assembly mechanism can slide parallel to the piston rod during operation, depending on the screwing in / out of the guide sleeve. This invention achieves the goals of ingenious design, simple structure, detachability, convenient downhole maintenance operations, improved work efficiency, rapid elimination of safety hazards, and enhanced downhole operational safety, thereby improving enterprise economic benefits. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a top view of the structure of the present invention;

[0017] Figure 3 This is a side view of the structure of the present invention;

[0018] Figure 4 This is a partial cross-sectional view of the present invention;

[0019] Figure 5 This is a side view schematic diagram of the invention in use;

[0020] Figure 6 This is a three-dimensional schematic diagram of the invention in use;

[0021] Figure 7 This is a side half-sectional view of the present invention in use.

[0022] Figure 8 This is a partially enlarged side view half-section schematic diagram of the present invention in use;

[0023] Figure 9 This is a schematic diagram of the structure of the present invention viewed from below;

[0024] Figure 10 This is a side sectional view of the quick-release connection mechanism EE of the present invention;

[0025] The markings in the diagram are: 1. Connecting block, 2. Straight connecting rod, 3. Diagonal tie rod, 4. Jack, 5. Ratchet assembly, 501. Ratchet unit, 502. Connecting plate, 6. Guide ring, 7. Inner liner, 8. Guide connecting rod, 9. Return spring, 10. High-strength pin, 11. U-shaped clip, 12. U-shaped clip seat, 13. Guide sleeve, 14. Column piston rod. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a top view schematic diagram of the present invention, a portable downhole support column quick-assembly and disassembly device, including an assembly and disassembly mechanism, an auxiliary mechanism, and a quick-release connection mechanism. The assembly and disassembly mechanism includes a connecting block 1, a straight connecting rod 2, a diagonal tie rod 3, a jack 4, and a ratchet assembly 5 for fitting onto the end face of the guide sleeve. There are four connecting blocks 1, four straight connecting rods 2, and four jacks 4. The connecting block 1 is an L-shaped right-angle structure with equal side length. Three horizontal grooves are opened on each of the two sides of the connecting block 1. Through holes are provided at the upper and lower ends of the grooves. The two ends of the straight connecting rod 2 are also provided with reserved holes. The two ends of the straight connecting rod 2 are fixed together with two adjacent L-shaped connecting blocks 1 through the quick-release connection mechanism fixed in the reserved holes, forming a square rigid support frame.

[0028] like Figure 2 , Figure 3 and Figure 4 As shown, Figure 3 This is a side view of the structure of the present invention. Figure 4 This is a partial cross-sectional schematic diagram of the present invention. The number of the inclined tie rods 3 is four sets, one at the top and one at the bottom of each set. One end of each set of inclined tie rods 3 is fixed to the pre-reserved hole at the near end of one side of the connecting block 1 through a quick-release connection mechanism, and the other end is fixed to the pre-reserved hole at the far end of the adjacent connecting block 1 through a quick-release connection mechanism, forming a right-angled triangular stable support structure. A parallel space is formed between the upper and lower inclined tie rods 3 for installing jacks 4. The tail of the jack 4 is connected to the connecting block 1 through a quick-release connection mechanism. The cylinder of the jack passes through the parallel space formed by the upper and lower inclined tie rods 3. The free end of the push rod of the jack 4 is pinned to the ratchet assembly 5 through a pin mechanism. The four jacks 4 are fixedly connected in sequence to form a ring telescopic structure. The guide sleeve is tightened or disassembled by simultaneously extending and retracting the ratchet assembly 5 through the four jacks 4.

[0029] like Figure 2 As shown, Figure 2 This is a top view structural diagram of the present invention. The ratchet assembly 5 includes two semi-circular ratchet units 501, a connecting plate 502, and fixing bolts. The ends of the two ratchet units 501 and the connecting plate 502 are provided with reserved holes for installing fixing bolts. The two semi-circular ratchet units 501 are fixedly connected by fixing bolts to form a hollow annular structure. The hollow part is an octagonal shape that matches the shape of the guide sleeve end face. A return spring is provided in the space of each upper and lower inclined pull rod. One end of the return spring is fixed to the outer wall of the cylinder of the jack 4, and the other end is fixed to the middle position of the adjacent straight connecting rod, so that the jack push rod automatically engages with the ratchet groove when it is retracted, and at the same time, it is convenient for the jack to adjust the direction.

[0030] The pushing direction of the jack 4 push rod is externally tangent to the circular motion trajectory line of the ratchet assembly 5 to ensure maximum torque output; the four jacks 4 are connected in parallel through a synchronization valve to enable the four jacks 4 to extend and retract synchronously; the installation position of the diagonal tie rod 3 is parallel to the pushing axis of the jack 4 push rod to increase the overall stability of the mechanism.

[0031] As a further optimization of the aforementioned portable downhole column quick assembly and disassembly device, the auxiliary mechanism includes a guide ring 6, an inner liner 7, and guide connecting rods 8. There are four guide connecting rods 8. The upper and lower ends of the guide connecting rods 8 are respectively fixed to the guide ring 6 and the connecting block 1 by bolts, forming a structure with the lower assembly and disassembly mechanism that has an isosceles trapezoidal shape on the side. The guide ring 6 is a circular ring structure. The inner liner 7 is located inside the guide ring 6. The inner liner 7 is made of flexible material and coated with lubricating oil to avoid damage to the guide sleeve piston rod during sliding.

[0032] As a further optimization of the aforementioned portable downhole column quick-release device, the quick-release connection mechanism includes a high-strength pin 10, a U-shaped clip 11, and a U-shaped clip seat 12.

[0033] In practice, such as Figure 5 and Figure 6 As shown, Figure 5 This is a side view schematic diagram of the invention in use. Figure 6 This is a three-dimensional schematic diagram of the invention in use. The working process of the invention is described as follows: First, select a ratchet assembly 5 of appropriate size according to the shape and size of the threaded column guide sleeve used; then, install the invention from top to bottom at the predetermined position of the threaded column guide sleeve; the ratchet disc is parallel to the end face of the guide sleeve and is prevented from falling on the stepped platform of the guide sleeve. The four jacks in the disassembly and assembly mechanism are connected in parallel through high-pressure hoses and synchronous valves (purchased parts: one-way four or one-way two), so that the four jacks move synchronously. The auxiliary mechanism (guide ring 6, inner liner 7 and guide connecting rod 8) uses the piston rod as a slide rail, so that the rotation center formed by the entire disassembly and assembly mechanism coincides with the piston rod axis. During the entire disassembly and assembly process, the disassembly and assembly mechanism will slide up and down along the column piston rod as the guide sleeve is screwed out (or screwed in). The front end of the jack push rod is a push pin. In order to ensure maximum torque output, the push axis is tangent to the ratchet circular motion trajectory line during the design process. In order to increase the overall strength and stability of the mechanism, the diagonal tie rod 3 is parallel to the push axis. Meanwhile, the tie rod 3 provides support, guidance, and safety protection for personnel during the pushing and retraction of the jack 4.

[0034] In practical applications, to facilitate quick installation, carrying and use by maintenance personnel, most of the components are connected in a detachable manner. At the same time, taking into full account the underground working environment, the connection ends are all fixed with U-shaped clips, and the same model is guaranteed for easy replacement.

[0035] This invention is ingeniously designed, with a simple and detachable structure. It fully considers the underground working environment of coal mines and cleverly utilizes the space structure of the column, guide sleeve, and piston. The power source is safe, stable, powerful, and has a short transmission distance, which facilitates underground maintenance operations, improves work efficiency, and quickly eliminates safety hazards. At the same time, it ensures the safety of underground operations, improves the economic benefits of enterprises, and solves the problem of threaded column guide sleeves (which, after a period of use, are difficult to unscrew manually under pressure, corrosion, etc.) in existing underground coal mine production. Compared with existing technologies, it has a very good market prospect and development space.

[0036] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the concept of the present invention.

Claims

1. A portable downhole support column quick-assembly and disassembly device, characterized in that: The assembly includes a disassembly and assembly mechanism, an auxiliary mechanism, and a quick-release connection mechanism. The disassembly and assembly mechanism includes a connecting block (1), a straight connecting rod (2), a diagonal tie rod (3), a jack (4), and a ratchet assembly (5) for fitting onto the end face of the guide sleeve. There are four connecting blocks (1), four straight connecting rods (2), and four jacks (4). The connecting block (1) is an L-shaped right-angle structure with equal side length. Three horizontal grooves are provided on each of the two sides of the connecting block (1). Through holes are provided at the upper and lower ends of the grooves. The two ends of the straight connecting rod (2) are also provided with reserved holes. The two ends of the straight connecting rod (2) are fixed together with two adjacent L-shaped connecting blocks (1) through a quick-release connection mechanism fixed in the reserved holes, forming a square rigid support frame. There are four sets of diagonal tie rods (3), each set There are two sets of inclined tie rods (3) at the top and bottom. One end of each set of inclined tie rods (3) is fixed to the near end through hole of one side of the connecting block (1) through a quick-release connection mechanism, and the other end is fixed to the far end through hole of one side of the adjacent connecting block (1) through a quick-release connection mechanism, forming a right-angled triangle stable support structure. The middle of the two inclined tie rods (3) at the top and bottom forms a parallel space reserved for installing jacks (4). The tail of the jack (4) is connected to the connecting block (1) through a quick-release connection mechanism. The cylinder of the jack (4) passes through the parallel space formed by the upper and lower inclined tie rods. The free end of the push rod of the jack (4) is pinned to the ratchet assembly through a pin mechanism. The four jacks (4) are fixedly connected in sequence to form a ring telescopic structure. The guide sleeve is tightened or disassembled by simultaneously telescopically pulling the ratchet assembly (5) of the four jacks (4). The ratchet assembly (5) includes two semi-circular ratchet units (501) in half, a connecting plate (502) and a fixing bolt. The ends of the two ratchet units (501) and the connecting plate (502) are provided with reserved holes for installing the fixing bolt. The two semi-circular ratchet units (501) in half are fixedly connected by the fixing bolt to form a hollow ring structure. The hollow part is an octagonal shape that matches the shape of the end face of the guide sleeve. The direction of the push rod of the jack (4) is externally tangent to the circular motion trajectory of the ratchet assembly (5) to ensure maximum torque output; The installation position of the diagonal tie rod (3) is parallel to the pushing axis of the jack (4) push rod to increase the overall stability of the mechanism; The auxiliary mechanism includes a guide ring (6), an inner liner (7), and guide rods (8). There are four guide rods (8). The upper and lower ends of the guide rods (8) are fixed to the guide ring (6) and the connecting block (1) by bolts, forming an isosceles trapezoidal structure with the lower disassembly and assembly mechanism. The guide ring (6) is a circular ring structure. The inner liner (7) is located inside the guide ring (6). The inner liner (7) is made of flexible material and coated with lubricating oil to avoid damage to the guide sleeve piston rod during sliding.

2. The portable downhole support quick-assembly and disassembly device as described in claim 1, characterized in that: The four jacks (4) are connected in parallel via a synchronization valve so that the four jacks (4) extend and retract synchronously.

3. The portable downhole support quick-assembly and disassembly device as described in claim 1, characterized in that: The quick-release connection mechanism includes a high-strength pin (10), a U-shaped clip (11), and a U-shaped clip seat (12).

4. The portable downhole support quick-assembly and disassembly device as described in claim 1, characterized in that: Each upper and lower diagonal tie rod (3) is equipped with a return spring (9). One end of the return spring (9) is fixed on the outer wall of the cylinder of the jack (4), and the other end is fixed in the middle of the adjacent straight connecting rod (2) so that the jack push rod automatically engages with the ratchet groove when it retracts.

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