Horizontal directional drilling tool structure with centralizer

Abstract

The utility model relates to the technical field of drilling tools, and discloses a horizontal directional drilling tool structure with a centralizer, which comprises a drilling rod, the end part of the drilling rod is provided with a detachable drill bit, and the rod body of the drilling rod is provided with a centralizing assembly and an auxiliary assembly; the righting assembly comprises a fixed seat fixedly connected with the drill rod and a movable seat slidably connected with the drill rod, a first node seat is fixedly mounted on the side face of the fixed seat, a second node seat is fixedly mounted on the side face, adjacent to the fixed seat, of the movable seat, and circular shafts are rotationally arranged on the first node seat and the second node seat correspondingly. And a connecting rod is fixedly mounted on the circular shaft. According to the horizontal directional drilling tool structure with the centralizer, the balls are arranged on the contact faces of the supporting pieces and the hole walls, point-to-point contact is achieved through the balls, the contact area is reduced, and therefore friction is reduced, meanwhile, the positions of the supporting pieces can be flexibly adjusted, the centralizing requirements of holes of different sizes are met, and the performance of the whole device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling tool technical field, concretely is a horizontal directional drilling drilling tool structure with centralizer. BACKGROUND

[0002] Horizontal directional drilling is a kind of trenchless construction technology, mainly used for the laying of underground pipeline (such as natural gas, power, communication, water supply pipeline), adopts multistage reamer to expand guide hole to design diameter, and finally back drag pipeline to complete laying.

[0003] The conventional centralizer slides and rubs with the hole wall when the drill rod rotates, which easily leads to the increase of the drilling tool torque, the damage of the hole wall, and the deviation of the drill rod when the hole diameter shrinks or expands, affecting the reaming effect, and the horizontal directional drilling drilling tool structure with centralizer is provided to solve the above problems. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a horizontal directional drilling drilling tool structure with centralizer, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical scheme: a horizontal directional drilling drilling tool structure with centralizer, comprising: drill rod, the end of the drill rod is provided with detachable drill bit, and the rod body of drill rod is provided with centralizer assembly and auxiliary assembly;The centralizer assembly includes the fixed seat fixedly connected with the drill rod and the movable seat slidingly connected with the drill rod, the side surface of the fixed seat is fixedly installed with the first node seat, the side surface adjacent to the fixed seat of the movable seat is fixedly installed with the second node seat, the first node seat and the second node seat are rotatably provided with round shafts, the round shafts are fixedly installed with connecting rods, and the connecting rods are also rotatably connected with support pieces through round shafts, the inner cavity of the support piece is provided with a ball, the support piece is also inserted with a clamping plate, the support piece is also screwedly connected with a bolt, and the clamping plate is connected with the support piece through the bolt;The auxiliary assembly includes dust cover, and electro-hydraulic push-pull rod and U-shaped buckle arranged on the side wall of the sliding groove of the drill rod for being connected with the movable seat, the electro-hydraulic push-pull rod is provided with a circulating oil pipe, the drill rod is provided with an oil passage hole for accommodating the circulating oil pipe, the side surface adjacent to the support piece of the dust cover is fixedly installed with a positioning rod, the positioning rod is inserted with the support piece, and the dust cover is also provided with a threaded assembly hole matched with the bolt.

[0006] Preferably, the maximum diameter surface of the ball is below the side of the clamping plate away from the support piece.

[0007] Preferably, a first hole and a second hole for passing through the ball are arranged on the dust cover and the clamping plate respectively, and the size of the second hole of the dust cover is smaller than the size of the first hole of the clamping plate.

[0008] Preferably, the side surface of the dust cover away from the support is arc-shaped, and the distance between the highest point of the arc-shaped surface and the drill rod is less than the distance between the highest point of the ball and the drill rod.

[0009] Preferably, the ball is in rolling contact with the support and the clamping plate.

[0010] Preferably, the output shaft of the electro-hydraulic push-pull rod is fixedly connected with the movable seat, and the electro-hydraulic push-pull rod is provided with two.

[0011] Preferably, the opening end of the circulating oil pipe passes through the U-shaped buckle and the oil passage hole in sequence and is connected with the hydraulic machine of the electro-hydraulic push-pull rod.

[0012] Preferably, the oil passage hole is arranged on the end of the drill rod away from the drill bit.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The horizontal directional drilling tool structure with a centralizer, by arranging the ball on the contact surface of the support and the hole wall, point-to-point contact is realized by the ball, the contact area is reduced, thereby reducing friction, and the position of the support can also be flexibly adjusted, the centralizing requirement of different size holes is met, and the performance of the overall device is improved.

[0015] 2. The horizontal directional drilling tool structure with a centralizer, by arranging the dust cover on the surface of the support, only the working surface of the ball in contact with the hole wall is left, the well wall is directly blocked from being washed, large-particle impurities are prevented from entering the cavity of the support for placing the ball, the phenomenon of ball jamming is prevented, and the electro-hydraulic push-pull rod is integrated on the drill rod, so that the user can adjust the position of the support through the electro-hydraulic push-pull rod. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is an explosion view of the centralizing assembly structure of the utility model;

[0018] Figure 3 It is a support structure cutaway view of the utility model;

[0019] Figure 4 It is a support structure side view of the utility model;

[0020] Figure 5 It is a dust cover structure schematic view of the utility model;

[0021] Figure 6 It is an explosion view of the electro-hydraulic push-pull rod structure of the utility model.

[0022] In the figure: 1, drill pipe; 11, drill bit; 2, centralizer assembly; 21, fixed seat; 22, first node seat; 23, connecting rod; 24, support; 25, ball; 26, round shaft; 27, second node seat; 28, movable seat; 29, clamping plate; 210, bolt; 3, auxiliary assembly; 31, dust cover; 32, positioning rod; 33, electro-hydraulic push-pull rod; 34, threaded assembly hole; 35, U-shaped buckle; 36, circulating oil pipe; 37, oil passage hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-6 A horizontal directional drilling tool structure with a centralizer, comprising: a drill pipe 1, the end of the drill pipe 1 is provided with a detachable drill bit 11, and the drill pipe 1 is provided with a centralizer assembly 2 and an auxiliary assembly 3 on the rod body.

[0025] The centralizer assembly 2 comprises a fixed seat 21 fixedly connected with the drill pipe 1 and a movable seat 28 slidably connected with the drill pipe 1, the side surface of the fixed seat 21 is fixedly provided with a first node seat 22, the side surface adjacent to the fixed seat 21 of the movable seat 28 is fixedly provided with a second node seat 27, the first node seat 22 and the second node seat 27 are both provided with a round shaft 26, the connecting rod 23 is fixedly installed on the round shaft 26, and the support 24 is also rotatably connected with the connecting rod 23 through the round shaft 26, the ball 25 is arranged in the inner cavity of the support 24, the clamping plate 29 is inserted into the support 24, and the bolt 210 is threadedly connected with the support 24, and the clamping plate 29 is connected with the support 24 through the bolt 210; the maximum diameter surface of the ball 25 is located below the side surface of the clamping plate 29 away from the support 24, so as to limit the position of the ball 25 on the support 24 and prevent the support 24 from being separated, and the ball 25, the support 24 and the clamping plate 29 are in rolling contact.

[0026] The auxiliary assembly 3 comprises a dust cover 31, and an electro-hydraulic push-pull rod 33 and a U-shaped buckle 35 arranged on the sliding groove side wall of the drill rod 1 for connecting with the movable seat 28, the electro-hydraulic push-pull rod 33 is provided with a circulating oil pipe 36, the drill rod 1 is provided with an oil passage hole 37 for accommodating the circulating oil pipe 36, the side surface of the dust cover 31 adjacent to the support piece 24 is fixedly installed with a positioning rod 32, the positioning rod 32 is inserted with the support piece 24, the positioning rod 32 can first contact the dust cover 31 and the support piece 24, so that the No. 2 hole of the dust cover 31 can be aligned with the center of the ball 25 before the dust cover 31 contacts the support piece 24, avoiding the boundary of the No. 2 hole of the dust cover 31 scratching the ball 25, thereby ensuring the smoothness of the surface of the ball 25 after assembly, ensuring the performance of the ball 25, the dust cover 31 is further provided with a threaded assembly hole 34 matched with the bolt 210, the clamping plate 29 and the dust cover 31 are respectively provided with a No. 1 hole and a No. 2 hole for passing through the ball 25, the size of the No. 2 hole of the dust cover 31 is smaller than the size of the No. 1 hole of the clamping plate 29, the side surface of the dust cover 31 away from the support piece 24 is an arc surface, the distance between the highest point of the arc surface and the drill rod 1 is smaller than the distance between the highest point of the ball 25 and the drill rod 1, the output shaft of the electro-hydraulic push-pull rod 33 is fixedly connected with the movable seat 28, and the electro-hydraulic push-pull rod 33 is provided with two, the open end of the circulating oil pipe 36 passes through the U-shaped buckle 35 and the oil passage hole 37 in sequence and is connected with the hydraulic machine of the electro-hydraulic push-pull rod 33, the U-shaped buckle 35 can be used to limit the position of the circulating oil pipe 36, avoiding the circulating oil pipe 36 being excessively bent and interfering with the normal operation of the drill rod 1, and the oil passage hole 37 is arranged on the end of the drill rod 1 away from the drill bit 11.

[0027] The working principle is that the outer surface of the drill rod 1 is fixed with the fixed seat 21, the first node seat 22 fixed on the side of the fixed seat 21 is movably connected with the connecting rod 23 through the round shaft 26, the other end of the connecting rod 23 is also movably connected with the supporting piece 24, and the other end of the supporting piece 24 is also movably connected with the movable seat 28 which is slidably connected with the drill rod 1 through the connecting rod 23, so that after the movable seat 28 is pushed to slide on the drill rod 1 by the electro-hydraulic push-pull rod 33, the angle of the connecting rod 23 is changed, the distance between the supporting piece 24 and the drill rod 1 is changed, thereby being suitable for drilling operations of different diameters, and the user can control the hydraulic pressure in the electro-hydraulic push-pull rod 33 through the circulating oil pipe 36 to lock the movable seat 28, so that after the drill rod 1 drives the drill bit 11 to rotate, the ball 25 is limited on the supporting piece 24 through the clamping plate 29 connected with the supporting piece 24 through the bolt 210, and the ball 25 is in a flexible and movable state, so that only the point of the ball 25 protruding contacts the hole wall, the contact area is small, thereby reducing the friction and ensuring the whole centralizing effect, and the influence of the centralizing assembly 2 on the drill rod 1 is reduced; when the dust cover 31 is preloaded, the positioning rod 32 on the dust cover 31 is used for positioning, is inserted on the supporting piece 24, and then the bolt 210 passes through the end of the clamping plate 29 and is matched with the threaded assembly hole 34 on the dust cover 31 to lock the dust cover 31 on the supporting piece 24, so as to block the gap between the supporting piece 24 and the ball 25, and the dustproof effect is achieved.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A horizontal directional drilling tool structure with a centralizer, characterized by, Include: Drill pipe (1), the end of the drill pipe (1) is provided with a detachable drill bit (11), and the drill pipe (1) is provided with a centralizer assembly (2) and an auxiliary assembly (3) on the rod body; The centralizer assembly (2) comprises a fixed seat (21) fixedly connected with the drill pipe (1), and a movable seat (28) slidingly connected with the drill pipe (1), a first node seat (22) is fixedly installed on the side surface of the fixed seat (21), a second node seat (27) is fixedly installed on the side surface adjacent to the fixed seat (21) of the movable seat (28), a circular shaft (26) is rotatably arranged on the first node seat (22) and the second node seat (27), a connecting rod (23) is fixedly installed on the circular shaft (26), and the connecting rod (23) is also rotatably connected with a support (24) through the circular shaft (26), the support (24) is provided with a ball (25) in the inner cavity, the support (24) is also inserted with a clamping plate (29), and the support (24) is also threadedly connected with a bolt (210), the clamping plate (29) is connected with the support (24) through the bolt (210); The auxiliary assembly (3) comprises a dust cover (31), an electro-hydraulic push-pull rod (33) and a U-shaped buckle (35) provided on the slide groove side wall of the drill pipe (1) for connecting with the movable seat (28), the electro-hydraulic push-pull rod (33) is provided with a circulating oil pipe (36), the drill pipe (1) is provided with an oil passage hole (37) for accommodating the circulating oil pipe (36), the dust cover (31) is fixedly installed on the side surface adjacent to the support (24) and is provided with a positioning rod (32), the positioning rod (32) is inserted with the support (24), and the dust cover (31) is also provided with a threaded assembly hole (34) matched with the bolt (210).

2. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, The maximum diameter surface of the ball (25) is located below the side surface of the clamping plate (29) away from the support (24).

3. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, A first hole and a second hole for passing through the ball (25) are respectively formed in the clamping plate (29) and the dust cover (31), and the size of the second hole of the dust cover (31) is smaller than the size of the first hole of the clamping plate (29).

4. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, The side surface of the dust cover (31) away from the support (24) is arc-shaped, and the distance between the highest point of the arc-shaped surface and the drill pipe (1) is smaller than the distance between the highest point of the ball (25) and the drill pipe (1).

5. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, The ball (25), the support (24) and the clamping plate (29) are in rolling contact.

6. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, The output shaft of the electro-hydraulic push-pull rod (33) is fixedly connected with the movable seat (28), and the electro-hydraulic push-pull rod (33) is provided with two.

7. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, The open end of the circulating oil pipe (36) is connected with the hydraulic machine of the electro-hydraulic push-pull rod (33) through the U-shaped buckle (35) and the oil passage hole (37) in sequence.

8. A horizontal directional drilling assembly with a centralizer as defined in claim 1, wherein, The oil passage hole (37) is formed in the end of the drill pipe (1) away from the drill bit (11).

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