CN102828716A - Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater - Google Patents
Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater Download PDFInfo
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- CN102828716A CN102828716A CN2012103467651A CN201210346765A CN102828716A CN 102828716 A CN102828716 A CN 102828716A CN 2012103467651 A CN2012103467651 A CN 2012103467651A CN 201210346765 A CN201210346765 A CN 201210346765A CN 102828716 A CN102828716 A CN 102828716A
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Abstract
The invention discloses a sealed type hydraulic driving adjustable speed cutter of an oil pipe string with the diameter being phi 73mm or greater and solves the problem of cutting incapability of oil pipes and sleeve pipes in small sizes. The cutter consists of a speed regulating system, a motive power driving system and a spraying system, wherein a motive power pipe in the motive power system consists of two internal reducer pipes wound on a spiral groove of a pipe support body, when cutting liquid flows through the internal reducer pipes, the corresponding piston force is generated, the piston force is resolved in the axial direction and the annular direction, the two internal reducer pipes are in symmetrical arrangement, and the force couple is formed in the annular direction, so the torque is output, and the cutting goal is reached. The tool has the advantages that the pipe string with the minimum inner diameter being 62mm can be cut, in addition, the cutter can be used as a tool for cleaning the inner wall of the pipe string, and the blank of the small-diameter pipe string cutting is filled.
Description
Technical field
The present invention relates to a kind of tubing string cutting tool, concrete is the jet cutting tool.
Background technology
In the engineering accident of oil gas well, it is modal being hampered, meeting card, also is that intractability is bigger simultaneously.Along with the development of oilfield exploitation, phenomenons such as the distortion of the down-hole oil tube in oil field in all parts of the country, bad break also increase year by year, and the flexural deformation of tubing string makes the construction in later period operation relatively more difficult.Therefore after workover treatment need be cut oil pipe, just can salvage, subsequent job such as reparation.Conventional tubing string cutting technique mainly contains machine cuts, chemical cleavage and water conservancy cutting.Chemical cleavage is meant that using cable or coiled tubing to be lowered to instrument cuts through corrosion or blasting method.Chemical cleavage set of tools process of assembling hazardous needs the consumption of exact chemical medicament in the use, if get nowhere needs subjob again, and operating condition requirement hole deviation can not be too big.Machine cuts is to use drilling rod or coiled tubing to be lowered to motor and mechanical cutter cuts; When the oil pipe of cutting different model, sleeve pipe; Need to use the mechanical cutter of correspondingly-sized, and instrument easy abrasion and inefficacy, the wall thickness dimension that cutter can cut is also limited.The jet cutting is meant that using drilling rod or coiled tubing to be lowered to cutting tool utilizes the fluid of belt grinding character to carry out cutting operation; Simple, the safely cleaning of operating process not only; And the same specification instrument can satisfy the tubing string cutting of many sizes and different wall, can on big gradient and horizontal well, use.Therefore very wide application prospect is arranged in oilfield downhole operation.
The Wang Ruihe of China University Of Petroleum Beijing professor team design one cover abradant jet cuts bushing installation under water, and its incised system is applicable to the sleeve pipe and 30 of 7 "～20 " " the marine riser cutting, but " following small size sleeve pipe and oil pipe then can't cut for 7.Its structure provides rotary power by hydraulic motor, transfers torque on the main shaft through motor spindle, flat key, is delivered to rotary cutting head by main shaft through transition pipe nipple again.Cutting liquid then is connected in the chamber of core barrel by the high pressure line joint, gets into rotary cutting head through the perforate of central axis and the centre bore of transition pipe nipple, realizes cutting by the nozzle ejection.Be characterized in by the hydraulic motor of known speed moment of torsion being provided, will cut liquid and introduce in the rotating drum, rotary speed is constant can't regulate.Its structure is owing to receive the hydraulic motor restriction, and size is bigger, and complex structure need have fluid motor-driven liquid and rotation cutting liquid two cover liquid instruments, operation inconvenience.Owing to there is above defective, this kind equipment can't carry out cutting operation in the small size caliber.
Summary of the invention
The objective of the invention is to the problem that exists in the background technology, providing a kind of can carry out the instrument that jet cuts to small size sleeve pipe or oil pipe.
For realizing the foregoing invention purpose; The technical scheme that the application adopts is: the closed fluid power of Φ 73mm and above tubing string drives the adjustable speed cutter; Form by governing system, the power drive line spraying system of unifying successively from top to bottom; Wherein governing system comprise crossover sub, dummy piston, on be rotatably connected body, decelerating casing, spring mechanism, movable friction plate and static friction sheet, crossover sub is threaded with decelerating casing, on the body that is rotatably connected be positioned at the decelerating casing center through axle sleeve; Crossover sub and on the be rotatably connected axle center of body centre bore is set respectively, on the be rotatably connected top of body be with dummy piston; The sidewall of above-mentioned decelerating casing sets out oilhole, and the chamber of dummy piston bottom is a lubricating cavity, and the chamber of cutting flow warp is the cutting chamber; On be rotatably connected body and movable friction plate and static friction sheet and spring mechanism form disc type brake mechanism.
Said power-driven system; Comprise pipe dish, power pipe, pipe dish, taper roll bearing, shell and rotation connector down down, shell is threaded with decelerating casing, on manage the lower end that the valve snail line is connected the body that is rotatably connected; Manage the valve snail line down and be connected down the upper end that rotates connector; The two ends of power pipe are fixing in the enclosure through upper and lower pipe dish, and following rotation connector is fixing in the enclosure through taper roll bearing, and the lower sides of shell is provided with oil filler point; The lower port of the shell end cap that is threaded, following rotation connector passes end cap; Above-mentioned power pipe is made up of two inner-diameter changeable pipes and pipe supporter; The inner plurality of sections diameter-changing cavity that forms of inner-diameter changeable pipe wherein; Between per two sections diameter-changing cavities is connected chamber, each section diameter-changing cavity be into, to adopt the cylindric of undergauge structure, connected chamber respectively be cylindric in outlet; The pipe supporter is that external surface has two spiral fluted cylinders, and two inner-diameter changeable pipes are symmetrical in the central axis of pipe supporter and are coiled in respectively in two helicla flutes of pipe supporter, the both ends open of two inner-diameter changeable pipes be stuck in the pipe dish and under on the pipe dish.
Said spraying system; Comprise sprayer body, nozzle and nozzle block, sprayer body is threaded in down the tail end of rotation connector, and the sidewall of sprayer body is through nozzle block fixed nozzle; The axle center that rotates connector down is provided with centre bore, and the centre bore of following rotation connector is communicated with nozzle.
Said dummy piston comprises interior sealing and fixing body, piston body and external seal fixed body; The inboard of piston body and the outside are provided with external seal parts and interior seal member respectively; The quantity of inside and outside seal member is respectively twice, between the seal member interior seal stopper ring is set in the twice, between the twice external seal parts external seal baffle ring is set; Above-mentioned inside and outside seal member is fixed on the piston body through inside and outside sealing and fixing body respectively; Have aperture in the middle of interior seal stopper ring and the external seal baffle ring, be connected on the piston body by pin, piston body adopts with inside and outside sealing and fixing body and is threaded.
Said disc type brake mechanism; Comprise the body that is rotatably connected, spring mechanism and some dynamic and static friction plates; Wherein static friction sheet and movable friction plate are alternately placed; The static friction sheet is connected with the decelerating casing key, movable friction plate with on the body key that is rotatably connected be connected, the external spring mechanism that is fixed with is rotatably connected on the static friction sheet top.
Beneficial effect: this tool construction is simply ingenious, safe and reliable, and it possesses following characteristics:
1) small size: this instrument can realize that minimum diameter is the tubing string incised of 62mm, and cutting equipment outside dimension in the past is big, can't be lowered to the small size tubing string, can not realize the incised of little caliber;
2) closed: the fluid cutting liquid in this tool interior working chamber and the tubing string string is separated by dummy piston, and wherein the working chamber inner part is worked under the machine oil environment, and not cut liquid influences;
3) adjustable speed: when rotary speed was low, this instrument can be used as cutting tool and uses; When rotary speed is higher, can be used as tubing string inwall cleaning means and use.
Description of drawings
Fig. 1 is the overall structure sketch map of tubing string cutter of the present invention.
Fig. 2 is a cutter upper semisection structural representation.
Fig. 3 is a cutter lower semisection structural representation.
Fig. 4 is the structural representation of dummy piston.
Fig. 5 is the perspective view of power pipe.
Fig. 6 is the structural representation of power pipe.
Fig. 7 be Fig. 6 partly cut open figure.
Fig. 8 is the structural representation of reducer pipe.
Fig. 9 is the A-A view among Fig. 1 and Fig. 3.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described:
Combine Fig. 2, shown in Figure 3 by Fig. 1: the application's the Φ 73mm and the closed fluid power of above tubing string drive the adjustable speed cutter; Form by governing system, the power drive line spraying system of unifying successively from top to bottom; Wherein governing system comprise crossover sub 1, dummy piston 2, on be rotatably connected body 3, decelerating casing 6, spring mechanism 7, movable friction plate 8 and static friction sheet 9; Crossover sub 1 is threaded with decelerating casing 6; On the body 3 that is rotatably connected be positioned at decelerating casing 6 centers through axle sleeve 5, crossover sub 1 and on the be rotatably connected axle center of body 3 centre bore is set respectively, on the be rotatably connected top of body 3 be with dummy piston 2; By shown in Figure 4: said dummy piston 2 comprises interior sealing and fixing body 21, piston body 22 and external seal fixed body 28; The inboard of piston body 22 and the outside are provided with external seal parts 23 and interior seal member 27 respectively; The quantity of inside and outside seal member is respectively twice; Seal stopper ring 26 in being provided with between the seal member in the twice; Between the twice external seal parts external seal baffle ring 24 is set, above-mentioned inside and outside seal member is fixed on the piston body 22 through inside and outside sealing and fixing body 21,28 respectively, interior seal stopper ring 26 and the external seal baffle ring 24 middle apertures that have; Be connected on the piston body 22 by pin 25, piston body 22 adopts with inside and outside sealing and fixing body 21,28 and is threaded.The sidewall of above-mentioned decelerating casing 6 sets out oilhole 4, and the chamber of dummy piston below 2 forms lubricating cavity 10, and the chamber of cutting flow warp is cutting chamber 11; Dummy piston 2 is through moving axially the pressure between balance lubricating cavity 10 and the cutting chamber 11.On be rotatably connected body 3 and movable friction plate 8 and static friction sheet 9 and spring mechanism 7 form disc type brake mechanisms.
Said power-driven system; Comprise pipe dish 31, power pipe 32, following pipe dish 33, taper roll bearing 34, shell 36 and rotate connector 38 down, shell 36 is threaded with decelerating casing 6, and last pipe dish 31 is threaded in the lower end of the body 3 that is rotatably connected; Following pipe dish 33 is threaded in down the upper end of rotation connector 38; The two ends of power pipe 32 are fixed in the shell 36 through upper and lower pipe dish 31,33, and following rotation connector 38 is fixed in the shell 36 through taper roll bearing 34, and the lower sides of shell 36 is provided with oil filler point 35; The lower end threaded ends lid 37 of shell 36, following rotation connector 38 passes end cap 37; By Fig. 5,6,7, shown in 8: above-mentioned power pipe 32 is made up of two inner-diameter changeable pipes 41 and pipe supporter 42; The inner-diameter changeable pipe 41 inner plurality of sections diameter-changing cavities 43 that form wherein; Between per two sections diameter-changing cavities 43 is connected chamber 44; Each section diameter-changing cavity 43 is to adopt the cylindric of undergauge structure into, outlet, and connected chamber 44 is cylindric; Pipe supporter 42 is cylinders that external surface has two helicla flutes 45; Two inner-diameter changeable pipes 41 are symmetrical in the central axis of pipe supporter 42 and are coiled in respectively in two helicla flutes 45 of pipe supporter 42, the both ends open of two inner-diameter changeable pipes 41 be stuck in pipe dish 31 and under on the pipe dish 33.Under rotate connector 38 and be used for connecting spraying system equipment; Power pipe 32 produces corresponding piston power under the effect of liquid, this piston force is decomposed into axially and the hoop both direction, because of two inner-diameter changeable pipes are symmetric arrangement; So on hoop, form couple, thereby output torque.Taper roll bearing 34 will rotate connector 38 down to be set upright, and axial load is delivered on the shell 35.On the body 3 that is rotatably connected transfer torque to governing system, following rotation connector 38 transfers torque to spraying system.
By shown in Figure 9: said spraying system; Comprise sprayer body 53, nozzle 52 and nozzle block 51; Sprayer body 53 is threaded in down the tail end of rotation connector 38; The sidewall of sprayer body 53 is through nozzle block 52 fixed nozzles 51, and the axle center of following rotation connector 38 is provided with centre bore, and the centre bore of following rotation connector 38 is communicated with nozzle 52.
This instrument is to inject cutting liquid by ground pump truck rotary power and jet pressure are provided; Concrete is the centre bore entering of cutting liquid from crossover sub; The centre bore of body, the inner-diameter changeable pipe of power pipe and the centre bore of following rotation connector are rotatably connected on the process; The airtight chamber of above-mentioned cutting flow warp is referred to as cutting chamber 11, because the pressure in the cutting chamber 11 is greater than the oil pressure in the lubricating cavity 10, dummy piston 2 produces axial displacement under the effect of pressure reduction; 10 lubricating fluid in the compression lubricating cavity is up to the pressure at two ends balance.Cutting liquid gets into the centre bore of the body 3 that is rotatably connected; When getting in the power pipe 32 through last pipe dish 31; Because the change of power pipe 32 inner flow passages; Liquid produces certain piston force to power pipe 32, and there are certain angle in piston force and central axis in the power pipe 32, produces moment of torsion so promote rotation.The cutting flow behind power pipe 32, through under rotate connector 38 and get into sprayer bodies 53 and penetrate at a high speed from nozzle 52, realize the rotation cutting.The rotating speed control of this instrument is made up of many groups friction plate and spring mechanism 7; The control of the decrement through spring mechanism 7 can be regulated the frictional force between the friction plate, and wherein static friction sheet 9 is alternately placed with movable friction plate 8, and static friction sheet 9 is connected with decelerating casing 6 keys; And movable friction plate 8 with on body 3 keys that are rotatably connected be connected; Produce frictional force through the relative motion between them,, realize the control of rotating speed through the adjusting of spring mechanism 7 being controlled the size of frictional force.
Claims (3)
1. the closed fluid power of Φ 73mm and above tubing string drives the adjustable speed cutter; Form by governing system, the power drive line spraying system of unifying successively from top to bottom; It is characterized in that: said governing system; Comprise crossover sub, dummy piston, on be rotatably connected body, decelerating casing, spring mechanism, movable friction plate and static friction sheet, crossover sub is threaded with decelerating casing, on the body that is rotatably connected be positioned at the decelerating casing center through axle sleeve; Crossover sub and on the be rotatably connected axle center of body centre bore is set respectively, on the be rotatably connected top of body be with dummy piston; The sidewall of above-mentioned decelerating casing sets out oilhole, and the chamber of dummy piston bottom is a lubricating cavity, and the chamber of cutting flow warp is the cutting chamber; On be rotatably connected body and movable friction plate and static friction sheet and spring mechanism form disc type brake mechanism; Said power-driven system; Comprise pipe dish, power pipe, pipe dish, bearing, shell and rotation connector down down, shell is threaded with decelerating casing, on manage the lower end that the valve snail line is connected the body that is rotatably connected; Manage the valve snail line down and be connected down the upper end that rotates connector; The two ends of power pipe are fixing in the enclosure through upper and lower pipe dish, and following rotation connector passes through bearing fixing in the enclosure, and the lower sides of shell is provided with oil filler point; The lower end threaded ends lid of shell, following rotation connector passes end cap; Above-mentioned power pipe is made up of two inner-diameter changeable pipes and pipe supporter, and the inner plurality of sections diameter-changing cavity that forms of wherein inner-diameter changeable pipe be a connected chamber between per two sections diameter-changing cavities, each section diameter-changing cavity be into, export the cylindric of employing undergauge structure, connected chamber is cylindric; The pipe supporter is that external surface has two spiral fluted cylinders, and two inner-diameter changeable pipes are symmetrical in the central axis of pipe supporter and are coiled in respectively in two helicla flutes of pipe supporter, and the both ends open of two inner-diameter changeable pipes is stuck in the pipe dish and reaches pipe dish down; Said spraying system; Comprise sprayer body, nozzle and nozzle block, sprayer body is threaded in down the tail end of rotation connector, and the sidewall of sprayer body is through nozzle block fixed nozzle; The axle center that rotates connector down is provided with centre bore, and the centre bore of following rotation connector is communicated with nozzle.
2. the closed fluid power of Φ 73mm according to claim 1 and above tubing string drives the adjustable speed cutter; It is characterized in that: said dummy piston comprises interior sealing and fixing body, piston body and external seal fixed body; The inboard of piston body and the outside are provided with external seal parts and interior seal member respectively; The quantity of inside and outside seal member is respectively twice, between the seal member interior seal stopper ring is set in the twice, between the twice external seal parts external seal baffle ring is set; Above-mentioned inside and outside seal member is fixed on the piston body through inside and outside sealing and fixing body respectively; Have aperture in the middle of interior seal stopper ring and the external seal baffle ring, be connected on the piston body by pin, piston body adopts with inside and outside sealing and fixing body and is threaded.
3. the closed fluid power of Φ 73mm according to claim 1 and above tubing string drives the adjustable speed cutter; It is characterized in that: said disc type brake mechanism; Comprise the body that is rotatably connected, spring mechanism and some dynamic and static friction plates, wherein static friction sheet and movable friction plate are alternately placed, and the static friction sheet is connected with the decelerating casing key; Movable friction plate with on the body key that is rotatably connected be connected, the external spring mechanism that is fixed with is rotatably connected on the static friction sheet top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210346765.1A CN102828716B (en) | 2012-09-18 | 2012-09-18 | Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210346765.1A CN102828716B (en) | 2012-09-18 | 2012-09-18 | Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102828716A true CN102828716A (en) | 2012-12-19 |
| CN102828716B CN102828716B (en) | 2015-03-18 |
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| CN201210346765.1A Expired - Fee Related CN102828716B (en) | 2012-09-18 | 2012-09-18 | Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089181A (en) * | 2013-01-14 | 2013-05-08 | 中国石油大学(华东) | Hydraulic cutter in pipe |
| CN105003221A (en) * | 2015-06-16 | 2015-10-28 | 东北石油大学 | Double-concentric controllable-speed cutter using abrasive jets |
| CN105134117A (en) * | 2015-09-22 | 2015-12-09 | 中国海洋石油总公司 | Integral rotary high-pressure jet cutting head |
| CN105134118A (en) * | 2015-07-22 | 2015-12-09 | 中国石油化工股份有限公司 | Cutting method for coiled tubing cutting tool string |
| CN105298421A (en) * | 2015-10-21 | 2016-02-03 | 中国石油天然气集团公司 | Speed-limited rotary cutting tool of coiled tubing abrasive water jetting |
| CN105298422A (en) * | 2015-10-21 | 2016-02-03 | 中国石油天然气集团公司 | Coiled tubing hydraulic-power rotary cutting system |
| CN112459739A (en) * | 2020-12-16 | 2021-03-09 | 南智（重庆）能源技术有限公司 | Variable-diameter drilling and milling device for oil and gas well |
| CN113187400A (en) * | 2021-05-07 | 2021-07-30 | 中海油田服务股份有限公司 | Rotatory speed limit sprays instrument that floats |
| CN113338829A (en) * | 2021-06-01 | 2021-09-03 | 中海油田服务股份有限公司 | Rotary speed-limiting jetting tool |
Families Citing this family (1)
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| CN110552663A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Flexible rotary jet cleaning tool |
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| CN201786301U (en) * | 2010-08-11 | 2011-04-06 | 山东正元地质资源勘查有限责任公司烟台分公司 | Three-head hydraulic cutting knife |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089181A (en) * | 2013-01-14 | 2013-05-08 | 中国石油大学(华东) | Hydraulic cutter in pipe |
| CN103089181B (en) * | 2013-01-14 | 2015-09-09 | 中国石油大学(华东) | Hydraulic cutter in pipe |
| CN105003221A (en) * | 2015-06-16 | 2015-10-28 | 东北石油大学 | Double-concentric controllable-speed cutter using abrasive jets |
| CN105134118A (en) * | 2015-07-22 | 2015-12-09 | 中国石油化工股份有限公司 | Cutting method for coiled tubing cutting tool string |
| CN105134117A (en) * | 2015-09-22 | 2015-12-09 | 中国海洋石油总公司 | Integral rotary high-pressure jet cutting head |
| CN105134117B (en) * | 2015-09-22 | 2017-07-14 | 中海油能源发展股份有限公司 | Integral rotary high-pressure jet cutting head |
| CN105298422A (en) * | 2015-10-21 | 2016-02-03 | 中国石油天然气集团公司 | Coiled tubing hydraulic-power rotary cutting system |
| CN105298421A (en) * | 2015-10-21 | 2016-02-03 | 中国石油天然气集团公司 | Speed-limited rotary cutting tool of coiled tubing abrasive water jetting |
| CN105298421B (en) * | 2015-10-21 | 2018-05-04 | 中国石油天然气集团公司 | Continuous pipe abradant jet speed limit rotary cutting tool |
| CN105298422B (en) * | 2015-10-21 | 2019-05-07 | 中国石油天然气集团公司 | Continuous pipe waterpower driven rotary diced system |
| CN112459739A (en) * | 2020-12-16 | 2021-03-09 | 南智（重庆）能源技术有限公司 | Variable-diameter drilling and milling device for oil and gas well |
| CN113187400A (en) * | 2021-05-07 | 2021-07-30 | 中海油田服务股份有限公司 | Rotatory speed limit sprays instrument that floats |
| CN113187400B (en) * | 2021-05-07 | 2022-10-18 | 中海油田服务股份有限公司 | Rotatory speed limit sprays instrument that floats |
| CN113338829A (en) * | 2021-06-01 | 2021-09-03 | 中海油田服务股份有限公司 | Rotary speed-limiting jetting tool |
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