A holding structure for a telescopic super-long drill pipe

Abstract

The utility model discloses a kind of for telescopic super-long drill rod's holding structure, belong to engineering drilling tool technical field, including a plurality of sliding member of being sequentially sleeved on inner rod, the side of sliding member is provided with holding part, holding part is respectively mutually slidably arranged with the first auxiliary pipe being set on the both sides of inner rod;The top of inner rod and the mutual connection between a plurality of sliding members are respectively through flexible connecting piece, when inner rod is stretched from outer rod, flexible connecting piece sequentially pull sliding member interval arrangement, to keep the position stability between first auxiliary pipe and inner rod.The utility model is used to solve telescopic vibration and impact drill rod after elongation, auxiliary pipeline is not positioned, and the problem of poor stability of easy deviation.

Description

Technical Field

[0001] This utility model belongs to the field of engineering drilling technology, specifically a retaining structure for telescopic ultra-long drill pipes. Background Technology

[0002] During the operation of vibratory drilling, the impact force is mainly provided by the high-pressure water flow and the high-frequency vibration of the vibratory drill bit. Therefore, compared with rotary drilling tools, vibratory drill bits typically do not rotate. Furthermore, to introduce the high-pressure water flow and power cables, auxiliary pipes are usually added to both sides of the intermediate drill rod, forming a typical three-pipe structure. The intermediate drill rod also serves as a material transporter. Traditional vibratory drill bits often use a segmented, butt-jointed drill rod structure. After each section of the drill rod is fully drilled into the formation, drilling must be paused to extend the drill rod. However, with a telescopic drill rod structure, the drill rod can be extended simply by pulling it upwards. As the intermediate drill rod is pulled out section by section, the side auxiliary pipes also extend accordingly. However, the drawback is that during the extension of the drill rod, there is no effective limiting constraint between the auxiliary pipe and the intermediate drill rod. This causes the soil around the pile to exert lateral pressure on the auxiliary pipe during continuous drilling, which can easily lead to pipe displacement and vibration, thereby weakening its positional stability and affecting the final hole formation efficiency. Therefore, in order to solve the above problems, a retaining structure for telescopic drill rods is proposed. Utility Model Content

[0003] To address the above problems, this utility model provides a retaining structure for telescopic ultra-long drill rods, which solves the problem that the auxiliary pipeline has no limit of movement and is prone to displacement and poor stability after the telescopic vibratory drill rod is extended.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A retaining structure for a telescopic ultra-long drill pipe includes several sliding parts sequentially sleeved on an inner rod. The sides of the sliding parts are provided with retaining parts, which are slidably disposed with first auxiliary tubes disposed on both sides of the inner rod.

[0006] The top of the inner rod and several sliding parts are connected to each other by flexible connectors. When the inner rod extends out of the outer rod, the flexible connectors pull the sliding parts at intervals in sequence to keep the position between the first auxiliary tube and the inner rod stable.

[0007] As a further improvement to the above solution, a fixed seat is provided at the top of the inner rod, a first connecting seat is connected to the fixed seat, a second connecting seat is fixedly provided on the side of the sliding member, and a flexible connecting member is connected to the first connecting seat and the second connecting seat respectively.

[0008] As a further improvement to the above solution, the side of the fixing base is also provided with an ear plate, which has a deflection groove running vertically through the ear plate. The first auxiliary tube passes through the deflection groove upward and moves within the deflection groove.

[0009] As a further improvement to the above scheme, the inner rod is slidably sleeved on the inner side of the outer rod, and the outer rod is provided with second auxiliary tubes on both sides, with the first auxiliary tube slidably sleeved on the inner side of the second auxiliary tube.

[0010] A connecting plate is provided on the side wall of the outer rod, and a locking seat is also provided on the fixed seat. The connecting plate and the locking seat can be fixed to each other by locking parts so that the inner rod and the outer rod are locked together.

[0011] As a further improvement to the above solution, the slider is a ring-shaped structure. The inner sidewall of the slider is provided with a protruding slide platform and a concave groove. The slide platform is used to slide in contact with the outer sidewall of the inner rod, and the groove is used to avoid the sliding key on the outer side of the inner rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By setting multiple sliding parts on the inner rod and connecting them with flexible connectors, the sliding parts can be gradually pulled up and spaced apart as the inner rod is pulled out to extend the drill pipe length. This provides a spaced-out holding effect between the inner rod and the first auxiliary pipe, preventing large swings of the first auxiliary pipe during drilling and overcoming the problem of unstable position of the first auxiliary pipe.

[0014] 2. The ear plate and deflection groove can maintain the connection between the first auxiliary tube and the sliding part. When the first auxiliary tube is squeezed during the drilling process, the deflection groove can be used to maintain the slight swing of the first auxiliary tube at the top position. As the first auxiliary tube moves downward together, the top position can be adjusted elastically, which can reduce the stress concentration on the first auxiliary tube and thus protect the first auxiliary tube.

[0015] 3. The locking seat and connecting plate can lock the inner rod and outer rod together when they are retracted, thereby maintaining the stability of the position between the first auxiliary tube and the second auxiliary tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of a retractable drill pipe.

[0018] Figure 3 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0019] Figure 4 This is a schematic diagram showing the arrangement of the sliding parts on the inner rod after the inner rod is pulled out and extended from the outer rod.

[0020] Figure 5 A schematic diagram of the first embodiment of the slider;

[0021] Figure 6 This is a schematic diagram of the second embodiment of the slider.

[0022] In the figure: 1. Inner rod; 2. Sliding member; 3. First auxiliary tube; 4. Flexible connector; 5. Outer rod; 6. Second auxiliary tube; 11. Fixed seat; 12. First connecting seat; 13. Ear plate; 14. Locking seat; 131. Deflection groove; 21. Holding part; 22. Second connecting seat; 23. Slide table; 24. Groove; 51. Connecting plate. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0024] like Figure 1-6 As shown, the specific solution of this embodiment is as follows: a retaining structure for a telescopic ultra-long drill rod includes several sliding members 2 sequentially sleeved on the inner rod 1. The sliding members 2 are annular structures, and in this embodiment, they are circular structures. The sliding members 2 slide back and forth on the outer side wall of the inner rod 1. A retaining part 21 is provided on the side of the sliding member 2. The retaining part 21 is slidably disposed with the first auxiliary tubes 3 disposed on both sides of the inner rod 1. Specifically, the retaining part 21 is two retaining plates fixedly disposed on the outer side wall of the sliding member 2. The retaining plates are provided with vertically penetrating sliding holes. The first auxiliary tubes 3 pass through the sliding holes and are slidably disposed with respect to the sliding holes. Therefore, under the interaction between the sliding member 2 and the retaining part 21, the retaining part 21 can play a retaining role for the first auxiliary tubes 3 on both sides, thereby keeping the position between the first auxiliary tubes 3 and the inner rod 1 stable.

[0025] The top of the inner rod 1 and several sliding parts 2 are connected to each other by flexible connectors 4. Specifically, a fixed seat 11 is provided at the top of the inner rod 1, and a first connecting seat 12 is connected to the fixed seat 11. A second connecting seat 22 is fixedly provided on the side of the sliding part 2. The flexible connectors 4 are respectively connected to the first connecting seat 12 and the second connecting seat 22. In this embodiment, the flexible connectors 4 are chains or chain plates. Therefore, with the above structure, when the inner rod 1 extends upward from the outer rod 5, the fixed seat 11 drives the flexible connectors 4 to pull the uppermost sliding part 2. After the flexible connectors 4 are fully extended, they start to pull the second sliding part 2 upward, so that the flexible connectors 4 pull the sliding parts 2 in sequence at intervals, so as to keep the position between the entire first auxiliary tube 3 and the inner rod 1 stable after the inner rod 1 is fully extended from the outer rod 5.

[0026] like Figure 1 , 3 As shown in the preferred embodiment, the side of the fixed base 11 is also provided with an ear plate 13. The ear plate 13 has a deflection groove 131 that runs vertically through it. The first auxiliary tube 3 passes through the deflection groove 131 and moves within it. Specifically, the first auxiliary tube 3 is fixed to the ear plate 13 by bolts, and a rubber pad is provided between the bolts and the ear plate 13. A rubber pad is provided between the lower side of the ear plate 13 and the limiting plate on the first auxiliary tube 3. This is simplified in the figure and is used to provide the interval for elastic change between the ear plate 13 and the first auxiliary tube 3, so that the first auxiliary tube 3 has a small movement in the vertical direction. Because of the deflection groove 131, the top of the first auxiliary tube 3 can swing slightly, thereby making a small adjustment, avoiding stress concentration during operation, and protecting the first auxiliary tube 3. The sliding member 2 is mainly used to limit the positional relationship between the first auxiliary tube 3 and the inner rod 1, avoid large deflection, and maintain the stability of the position between the first auxiliary tube 3 and the inner rod 1.

[0027] In a preferred embodiment, the inner rod 1 is slidably sleeved on the inner side of the outer rod 5, and the outer rod 5 is provided with second auxiliary tubes 6 on both sides. The first auxiliary tube 3 is slidably sleeved on the inner side of the second auxiliary tube 6, and the two are slidably connected to each other by a sealing ring. A connecting plate 51 is provided on the side wall of the outer rod 5, and a locking seat 14 is also provided on the fixing seat 11. The connecting plate 51 and the locking seat 14 can be fixed to each other by a locking pin, so that the inner rod 1 and the outer rod 5 can be locked to each other when the inner rod 1 does not extend the length of the drill rod, thereby maintaining the stability of the positions of the inner rod 1, the outer rod 5, the first auxiliary tube 3, and the second auxiliary tube 6.

[0028] like Figure 5 , 6As shown, as preferred embodiments of the above, two different structures of the slider 2 are illustrated. Specifically, the inner wall of the slider 2 is provided with a protruding slide platform 23 and a recessed groove 24. The slide platform 23 is used to slide in contact with the outer wall of the inner rod 1, and the groove 24 is used to avoid the sliding key on the outer side of the inner rod 1. Figure 5 , 6 The only difference between them is the width of the groove 24. Figure 5 The groove 24 in the middle is wide and does not contact the sliding key on the outer wall of the inner rod 1. Figure 6 The groove 24 in the inner rod is narrow and can slide with the slide key. The slide key on the outer side wall of the inner rod 1 is mainly used for guiding the contact between the inner rod 1 and the outer rod 5. That is, a sliding groove that cooperates with the slide key is provided on the inner side wall of the outer rod 5 so that the inner rod 1 can slide normally on the outer rod 5.

[0029] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A retaining structure for telescopic ultra-long drill pipes, characterized in that, It includes several sliding parts (2) that are sequentially sleeved on the inner rod (1). The side of the sliding part (2) is provided with a retaining part (21). The retaining part (21) is slidably disposed with the first auxiliary tube (3) disposed on both sides of the inner rod (1). The top of the inner rod (1) and several sliding parts (2) are connected to each other by flexible connectors (4). When the inner rod (1) extends out from the outer rod (5), the flexible connectors (4) pull the sliding parts (2) in sequence to maintain the position stability between the first auxiliary tube (3) and the inner rod (1).

2. The retaining structure for a telescopic ultra-long drill pipe according to claim 1, characterized in that, The top of the inner rod (1) is provided with a fixed seat (11), and the fixed seat (11) is connected to the first connecting seat (12). The side of the sliding member (2) is fixedly provided with a second connecting seat (22), and the flexible connecting member (4) is connected to the first connecting seat (12) and the second connecting seat (22) respectively.

3. A retaining structure for a telescopic ultra-long drill pipe according to claim 2, characterized in that, The side of the fixed base (11) is also provided with an ear plate (13), and the ear plate (13) has a deflection groove (131) that runs through it from top to bottom. The first auxiliary tube (3) passes through the deflection groove (131) upward and moves within the deflection groove (131).

4. A retaining structure for a telescopic ultra-long drill pipe according to claim 1, characterized in that, The inner rod (1) is slidably sleeved on the inner side of the outer rod (5), and the outer rod (5) is provided with a second auxiliary tube (6) on both sides. The first auxiliary tube (3) is slidably sleeved on the inner side of the second auxiliary tube (6). A connecting plate (51) is provided on the side wall of the outer rod (5), and a locking seat (14) is also provided on the fixing seat (11). The connecting plate (51) and the locking seat (14) can be fixed to each other by locking parts so that the inner rod (1) and the outer rod (5) are locked to each other.

5. A retaining structure for a telescopic ultra-long drill pipe according to claim 1, characterized in that, The sliding member (2) is a ring-shaped structure. The inner side wall of the sliding member (2) is provided with a protruding slide (23) and a concave groove (24). The slide (23) is used to slide in contact with the outer side wall of the inner rod (1), and the groove (24) is used to avoid the sliding key on the outer side of the inner rod (1).

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