CN202300263U

CN202300263U - Slider guide type hydraulic cutting knife

Info

Publication number: CN202300263U
Application number: CN201120378157XU
Authority: CN
Inventors: 郑文彬; 刘炤军; 吴海功
Original assignee: Shandong Zhengyuan Dizhi Resource Prospecting Co Ltd Yantai Branch
Current assignee: Shandong Zhengyuan Dizhi Resource Prospecting Co Ltd Yantai Branch
Priority date: 2011-10-09
Filing date: 2011-10-09
Publication date: 2012-07-04
Anticipated expiration: 2021-10-09

Abstract

The utility model discloses a slider guide type hydraulic cutting knife, which is characterized by comprising a short pipe (1), a spring seat (7), a guide body (8), a knife rest (14) and a guide head (16), which are connected through threads, wherein the short pipe (1) is provided with an overflow hole (17) and a pressure relief hole (18); and the short pipe (1) is internally provided with a piston (4), a spring (6) and a piston rod (5), the guide body (8) is internally provided with a guide block (10), the knife rest (14) is internally provided with a cone (12) and a knife head (13), the guide block (10) is fixed at the bottom end of the piston rod (5) through a lock spring (9), the cone (12) is connected with the piston rod (5) through an inside hexagonal bolt (15), and the knife head (13) is fixed at the lower end of the cone (12) through a lock spring. The slider guide type hydraulic cutting knife is compact in structure and small in size, a drill rod is rotated to push the piston move downwards by taking drilling fluid as power, the lower end of the piston rod pushes the guide block to move transversely to be in supporting friction with the inner wall of a pipe to be cut so as to play a guiding role, meanwhile, the cone pushes the knife head to move outwards to cut the pipe, and along with the continuous abrasion of the guide block and the inner wall of the pipe to be cut, the knife head gradually cuts the pipe until the pipe is cut off.

Description

Slide block correcting formula hydraulic pressure cutter

Technical field

The utility model relates to small-bore boring tool technical field, is a kind of slide block correcting formula hydraulic pressure cutter specifically, is used to cut accident drill rod or sleeve pipe.

Background technology

In the small-bore deep drilling of diamond, often run into the accident that drilling rod or sleeve pipe are pressed from both sides at present; Existing a kind of method commonly used is to return spud in bar or sleeve pipe with one one on screw tap, and this manual mode of operation efficient is low, and labor strength is big and the drill rod end screw thread is fragile; Another kind method is to cut from the top that is pressed from both sides the position with eccentric cutter, because small-bore probing drilling rod or casing diameter are less, eccentric cutter offset is little, and the effect of cutting is bad, is difficult to cut off drilling rod or sleeve pipe; It is to adopt three hydraulic pressure cutteves that a kind of method is arranged again, and this cutter is better in the upright opening result of use, but undesirable in the inclined hole result of use; Since inclined hole under action of gravity the power drilling rod near helping the borehole wall under, cutter cutter head unbalance stress, cutter head often collapses cutter; Often will cut repeatedly, success rate is lower.

Summary of the invention

The purpose of the utility model is the deficiency that overcomes above-mentioned prior art, and a kind of slide block correcting formula hydraulic pressure cutter is provided, and solves mainly that existing small-bore inclined hole probing cutting effect is poor, success rate and problem such as order is low and labor strength hand-manipulated is big.

In order to achieve the above object, the utility model is achieved in that slide block correcting formula hydraulic pressure cutter, and its special character is that it comprises short tube, spring base, correcting body, knife rest, target seeker, and five usefulness are threaded; Establish spout hole and relief hole on the wall of short tube; Piston, spring, piston rod are housed in the short tube, and piston is connected through nut with the top of piston rod, and spring housing is outside piston rod, and between piston and spring base, piston slides up and down in short tube; Establish guiding block in the correcting body; Establish centrum and cutter head in the knife rest, guiding block is fixed on the piston rod bottom through snap, and centrum is connected with the correcting body through guide pin bushing; Centrum is connected with hexagon socket head cap screw with piston rod; Centrum and piston rod are synchronized with the movement, and cutter head is fixed on the lower end of centrum through snap, studs with carbide alloy on the cutter head.

The slide block correcting formula hydraulic pressure cutter of the utility model, the lower end of its described piston rod and centrum are outer pyramidal surface; Described guiding block and cutter head inboard are interior pyramidal surface.

The slide block correcting formula hydraulic pressure cutter of the utility model, fluid power promotes piston and moves down during work, piston-rod lower end promotes guiding block and moves outward, closely contact with tube wall and rotates to wear and tear with pipe, simultaneously centrum to promote cutter head laterally mobile, cutter head cuts pipe.

Compared with present technology the described slide block correcting of the utility model formula hydraulic pressure cutter has following good effect: 1, since the correcting cutter that guiding block arranged all the time with to be cut pipe concentric; Rotation steadily in being cut pipe; Therefore be that inclined hole or straight hole cutter head all are to cut pipe stably; Can not occur collapsing the cutter phenomenon, success rate is high; 2, guiding block is that pyramidal surface contacts with piston-rod lower end and cutter head with centrum, slides steadily, makes cutting steadily; 3, this instrument have that compact conformation, volume are little, the cutter head cutting steadily, success rate is up to 100%, efficient is high, and is economical and practical, is particularly suitable for inclined hole and deep hole is small-bore.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the front view of piston-rod lower end and centrum;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the vertical view of Fig. 2;

Fig. 5 is the front view of guiding block and cutter head;

Fig. 6 is the left view of Fig. 5.

The specific embodiment:

In order to understand better and to implement, provide specific embodiment below in conjunction with accompanying drawing and specify the utility model slide block correcting formula hydraulic pressure cutter.

Embodiment 1, referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, is processed into short tube 1, spring base 7, correcting body 8, knife rest 14, target seeker 16, five usefulness and is threaded; On the wall of short tube 1, offer spout hole 17 and relief hole 18, spout hole 17 is to avoid the slush pump hypertonia, and relief hole 18 is to play the pressure release effect when having cut pipe; Piston 4, spring 6 and piston rod 5 are housed in short tube 1; Piston 4 is connected through bolt 2 with the top of piston rod 5; Spring 6 is enclosed within outside the piston rod 5, and between piston 4 and spring base 7, piston 4 can slide up and down in short tube 1 under fluid power and elastic force effect; Spring 6 can make piston 4 returns, and O type circle 3 is installed between piston 4 and the short tube 1; Guiding block 10, centrum 12 and cutter head 13 are installed in correcting body 8 and knife rest 14, and the lower end of piston rod 5 and centrum 12 are outer pyramidal surface, and guiding block 10 is interior pyramidal surface with cutter head 13 inboards; Guiding block 10 is fixed on piston rod 5 bottoms through snap 9; Centrum 12 is connected with correcting body 8 through guide pin bushing 11, and centrum 12 is connected with piston rod 5 usefulness hexagon socket head cap screws 15, realizes synchronous interaction up and down; Again cutter head 13 is fixed on the lower end of centrum 12 through snap; Snap can make cutter head 13 and guiding block 10 having cut than back return, on cutter head 13, studs with carbide alloy at last, is used for cutting drilling rod or sleeve pipe.

The described slide block correcting of the utility model formula hydraulic pressure cutter; Rotary motive power drilling rod during cutting; In the power drilling rod, carry drilling fluid through slush pump, drilling fluid is given pressure of piston, piston is slowly moved down and promote guiding block laterally outer move to be close to be cut tube wall and tube wall friction; Simultaneously centrum promotes cutter head cutting pipe, along with the wearing and tearing cutter head of guiding block and tube wall cuts pipe gradually till cut-out; Spout hole is to avoid the slush pump hypertonia, and relief hole is to play the pressure release effect when having cut pipe, and after pipe cut off, spring made and moves simultaneously snap on the piston and make in guiding block and the cutter head and move, and is convenient to cutter from the interior proposition of holing, and use next time again.

Claims

1. slide block correcting formula hydraulic pressure cutter is characterized in that it comprises short tube (1), spring base (7), correcting body (8), knife rest (14), target seeker (16), and five usefulness are threaded; Establish spout hole (17) and relief hole (18) on the wall of short tube (1); Piston (4), spring (6), piston rod (5) are housed in the short tube (1); Piston (4) is connected through nut (2) with the top of piston rod (5); Spring (6) is enclosed within outside the piston rod (5); Be positioned between piston (4) and the spring base (7), piston (4) slides up and down in short tube (1); Establish guiding block (10) in the correcting body (8); Establish centrum (12) and cutter head (13) in the knife rest (14), guiding block (10) is fixed on piston rod (5) bottom through snap (9), and centrum (12) is connected with correcting body (8) through guide pin bushing (11); Centrum (12) is connected with hexagon socket head cap screw (15) with piston rod (5); Centrum (12) and piston rod (5) are synchronized with the movement, and cutter head (13) is fixed on the lower end of centrum (12) through snap, and cutter head studs with carbide alloy on (13).

2. slide block correcting formula hydraulic pressure cutter according to claim 1 is characterized in that the lower end of described piston rod (5) and centrum (12) are outer pyramidal surface.

3. slide block correcting formula hydraulic pressure cutter according to claim 1 is characterized in that described guiding block (10) and cutter head (13) inboard is interior pyramidal surface.