CN201103359Y

CN201103359Y - Segmented cutter for casing tube of horizontal well

Info

Publication number: CN201103359Y
Application number: CNU2007200156142U
Authority: CN
Inventors: 曲景斌; 赵鑫; 李亚芳; 董军; 李玉凯
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2007-11-02
Filing date: 2007-11-02
Publication date: 2008-08-20
Anticipated expiration: 2017-11-02

Abstract

The utility model discloses a segment reaping machine of a horizontal well casing for heavy repair of oil wells for oil and gas exploitation, which comprises an upper joint, a variable torque commutative ring, an arbor, an anchor slip, a hydraulic piston, a regulating sleeve, a hydraulic spring, a main spring, a push rod, a blade, a knife pillow and an offsetting spring. The upper joint is connected with the arbor by a clamp spring; the hydraulic piston is arranged in the arbor and seats on the regulating sleeve; then the arbor is inserted in the anchor clip, while the hydraulic spring is pressed in a spring slot of the regulating sleeve; the main spring is arranged in the spring slot of the push rod; the blade is arranged at a top knife block connected with the body and is fixed by a bolt; the knife pillow is inlayed at a lower knife block and is fixed by a bolt; the offsetting spring is arranged in an inner cavity of the knife block for supporting. The machine of the utility model solves the problem in the prior art that the disassembly and replacement of a casing or a sieve tube in the heavy repair of horizontal oil wells is difficult enough to affect the operation, which can be widely used in the heavy repair operation of oil wells for oil and gas exploitation.

Description

The horizontal well casing pipe segmentation extracts device

Technical field:

The utility model relates to the horizontal well casing pipe segmentation that a kind of oil and gas exploitation workover uses and extracts device.

Background technology:

The technology that casing replacing is a more complicated in the workover treatment is got in oilfield horizontal well overhaul at present, at inclination section with horizontal segment is got casing replacing and the screen casing difficulty is bigger, also do not extract the instrument of sleeve pipe at present at this position. therefore, need develop the instrument that extracts sleeve pipe at this position, we have been developed into the horizontal well casing pipe segmentation and have extracted device from production practices, the similar mechanical type internal cutter of its structure, and its feature is that cutter head is in the bottom that extracts device, be convenient to discharge the iron that cuts out and cut, be difficult for bit freezing; It has machinery rotation cutting function, utilizes the rotation of drill string to reach the purpose of cutting.

The utility model content:

The utility model purpose is that a kind of horizontal well casing pipe segmentation that provides in order to overcome above-mentioned shortcoming extracts device, it has solved the horizontal well overhaul that exists in the prior art and has got casing replacing, gets casing replacing and the bigger problem that influences operation of screen casing difficulty at deflecting and horizontal segment.

The technical scheme that its technical problem that solves the utility model adopts is:

The horizontal well casing pipe segmentation extracts device by top connection, the bending moment ring change, knife bar, the grappling slips, hydraulic piston, regulating sleeve, the waterpower spring, main spring, push rod, blade, the cutter pillow, back-moving spring is formed: top connection is connected with jump ring with knife bar, pack into hydraulic piston in the knife bar and seat on regulating sleeve, knife bar is inserted in the grappling slips again, the waterpower spring is pressed in the spring groove of regulating sleeve, main spring is contained in the spring groove of push rod, being screwed on the upper tool post that blade is contained in body is connected, the cutter pillow is set on the lower slide and is screwed, and back-moving spring is contained in the knife rest inner chamber and does support with back-moving spring.During work: top connection with after drilling rod is connected, is extracted under the device horizontal well casing pipe segmentation to the precalculated position with drilling tool, and turn on pump is washed top of fish, this segmentation is extracted device again and is lowered to lentamente in the fish chamber; The grappling slips is produced relative friction with dragging for sleeve pipe or screen casing inwall after entering the fish chamber, produces relative motion, by the track commutation, is pushed to the knife bar bottom, after knife bar continues to come downwards to desired depth, stops descending; Carry drill string on this moment, make the up grappling slips that struts of cone, grappling slips and internal surface of sleeve pipe are killed; By inject liquid in drill string, under the condition that regulating sleeve (it is to regulate the parts that hydraulic piston is crossed liquid measure) regulates, it is descending that the waterpower spring promotes push rod, makes cutter rest the head on extrapolated blade in the descending process of push rod, and be close to the internal surface of sleeve pipe that is cut; Process rotary drill column 6-10 minute is with 20-30 rev/min speed, with casing severing.Under the effect of back-moving spring, make push rod up, waterpower spring, cutter pillow are regained, and blade is also regained simultaneously.Take out drill string and pull the sleeve pipe that is cut off out.

The novel beneficial effect of this use is that it is fast that this sleeve pipe segmentation extracts the device cutting speed: the sleeve pipe cutting of diameter 177.8mm only needs 6-8 minute; Behind the cutting sleeve pipe, can bite cut sleeve pipe by the tooth sheet of slips and also it can be pulled out, salvage again and drag for lance under not needing; Cutter head is in the bottom that extracts device, and the iron after the cutting is cut easy discharge ground; Reduce the number of times that makes a trip, reduced workover cost.

Description of drawings:

Accompanying drawing is the utility model overall structure schematic diagram.

Among the figure 1, top connection, 2, the bending moment ring change, 3, knife bar, 4, the grappling slips, 5, hydraulic piston, 6, regulating sleeve, 7, the waterpower spring, 8, main spring, 9, push rod, 10, blade, 11, the cutter pillow, 12, back-moving spring.

The specific embodiment:

In the accompanying drawings, the horizontal well casing pipe segmentation extracts device by 1, top connection, 2, the bending moment ring change, 3, knife bar, 4, the grappling slips, 5, hydraulic piston, 6, regulating sleeve, 7, the waterpower spring, 8, main spring, 9, push rod, 10, blade, 11, the cutter pillow, 12, back-moving spring is formed: top connection 1 is connected with knife bar 3 usefulness jump rings, pack into hydraulic piston 5 in the knife bar 3 and be sitting on the regulating sleeve, again knife bar 3 is inserted in the grappling slips 4, waterpower spring 7 is pressed in the spring groove of regulating sleeve 6, main spring 8 is contained in the spring groove of push rod 9, being screwed on the upper tool post that blade 10 is contained in body is connected, cutter pillow 11 is set on the lower slide and is screwed, and back-moving spring 12 is contained in the knife rest inner chamber and does support with back-moving spring 12.

Claims

1, a kind of horizontal well casing pipe segmentation extracts device by top connection (1), bending moment ring change (2), knife bar (3), grappling slips (4), hydraulic piston (5), regulating sleeve (6), waterpower spring (7), main spring (8), push rod (9), blade (10), cutter pillow (11), back-moving spring (12) is formed, it is characterized in that: top connection (1) is connected with jump ring with knife bar (3), pack into hydraulic piston (5) in the knife bar (3) and seat on regulating sleeve (6), knife bar (3) inserts in the grappling slips (4), waterpower spring (7) is pressed in the spring groove of regulating sleeve (6), main spring (8) is contained in the spring groove of push rod (9), being screwed on the upper tool post that blade (10) is contained in body is connected, cutter pillow (11) is set on the lower slide and is screwed, and back-moving spring (12) is contained in the knife rest inner chamber does support with back-moving spring.