CN101250994A - Oil well sand-pumping system as well as sand-pumping method thereof - Google Patents
Oil well sand-pumping system as well as sand-pumping method thereof Download PDFInfo
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- CN101250994A CN101250994A CNA200810103915XA CN200810103915A CN101250994A CN 101250994 A CN101250994 A CN 101250994A CN A200810103915X A CNA200810103915X A CN A200810103915XA CN 200810103915 A CN200810103915 A CN 200810103915A CN 101250994 A CN101250994 A CN 101250994A
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Abstract
The invention relates to the petroleum machinery technical field, in particular to a bailing device for an oil well and a bailing method using the same. The invention provides the bailing device for the oil well and the bailing method using the same to solve the problem of sealing property for a check valve in the prior bailing process, the problem of frictions between a pump body of a bailing pump and a bushing and between the pump body of the bailing pump and a coupling, and the problem of cleaning residual sands attached on the inner wall of the bushing, wherein, a drainage orifice is arranged above a piston rod of the vertical segment of the bailing pump, and an upper valve is arranged on the piston rod; a piston barrel, a hard piston, a soft piston, a sand blocking short circuit and a tool for cutting and pushing sands which are arranged behind the piston barrel are orderly arranged from a desilting pipe to the other end on the horizontal segment of the bailing pump, a centralizer is arranged on the pump body of the horizontal segment, and the other end of the tool for cutting and pushing sands is provided with a bottom valve and a sand shovel. The bailing device for the oil well has the advantages of excellent sealing property; small friction between the bailing pump and the bushing and between the bailing pump and the coupling; long service life; effective prevention of massive sand particles from entering inside the piston barrel; strong sand pumping property of the piston; and high work efficiency.
Description
Technical field
The present invention relates to the petroleum machinery technical field, be specifically related to a kind of oil well and drag for the sand system and drag for the sand method.
Background technology
In the Oilfield developing process, because loose sand formation cementation intensity is low or the influence of pressing crack construction, sand grains can flow into pit shaft along with formation fluid, causes pit shaft obstruction, down-hole string, instrument and ground installation wearing and tearing aggravation, and causes the oil well reduce or stop production.Generally speaking, adopt water circulation to carry method, the long-pending sand of pit shaft is broken up and take ground to by swiftly flowing liquid.Because the requirement of compatibility, density and the viscosity on sand cleaning fluid and stratum, this sand washing mode very easily cause formation contaminant and ground environment to pollute; For the bigger oil well of formation leakage amount, the hydraulic sand washing mode has certain degree of difficulty, can not finish the sand washing operation sometimes, and the job execution cycle is long, and down-hole accident easily takes place, and the work operations amount is bigger, the cost height.Conventional sand washing process is difficult for going out sand grains, and oil reservoir is polluted; And mechanical sand bucket is according to the operating principle of oil well pump, its power is working rig, the oil pipe on sand bucket top is as the line shaft of plunger, the bottom sand sediment pipe is as storage sand pocket, according to the height of sand post, the length of decision storage sand oil pipe, handling oil pipe up and down, directly sand is extracted in the storage sand oil pipe, finishes and drag for the sand operation.When strata pressure is low, oil reservoir is missed when serious, and this technology has bigger advantage.The restriction on the design feature but machinery drags for sand technology, the present range of application of this technology only is confined to Vertical Well, can't directly use horizontal well.
Summary of the invention
In order to solve the existing sealing problem that drags for ball-and-seat in the sand technology, friction problem between the pump housing of sand bucket and sleeve pipe and the box cupling, cleaning problem attached to the residual sand on the internal surface of sleeve pipe, and in taking out the sand process, sand liquid stops up the problem of sand pump and last valve, the invention provides a kind of oil well and drags for the sand system and drag for the sand method, has improved the efficient of dragging for sand, and desanding is thorough, not polluted reservoir.
In order to achieve the above object, the technical solution used in the present invention is: a kind of oil well drags for the sand system, is provided with outage above the piston rod of the vertical section of sand bucket, and piston rod is provided with valve; On the sand bucket horizontal segment, from the sand sediment pipe to the other end, be provided with piston cylinder successively, be provided with hard piston, soft piston, sand block short circuit, broken sand behind the piston cylinder and push away the sand instrument, on the horizontal segment pump housing, be provided with the instrument of setting upright, the other end that pushes away the sand instrument at broken sand is provided with bottom valve and sand shovel, and the horizontal sand that is combined into of bottom valve and sand shovel shovels.
Above-mentioned upward valve is common ball-and-seat, and bottom valve is the ball-and-seat that resets that leads, and described bottom valve valve interior wall upper edge valve body is axially arranged with three grooves, plays guiding and resets.
Bead in the above-mentioned bottom valve is the bakelite ball.
The above-mentioned instrument of setting upright is rubber centralizer or rolling wheel centralizer.
A kind of oil well drags for the sand method of dragging for of sand system, and it is as follows that it drags for the sand method step:
(1) be lowered in the process at pipe string, the broken sand of sand bucket front end pushes away the sand instrument and clears up remaining on the casing wall residual sand, and pushes it to and inhale the sand mouth, horizontal sand shovel contact sand face, and the weight of horizontal segment is supported by centralizer;
(2) when carrying power oil pipe on the tractor hoist, drive piston rod, soft piston and hard piston and rise, at this moment go up valve and close, bottom valve is opened, and carries sand and enter sand sediment pipe, and sand in the sand sediment pipe and well liquid are up because sand proportion is bigger, constantly sink, well liquid rises;
(3) with step (2) simultaneously, the well liquid that the sand block short circuit filter to rise makes sand can only be deposited in the sand sediment pipe;
(4) when tractor hoist is transferred power oil pipe, drive piston rod, soft piston and hard piston and descend, at this moment to go up valve and open, bottom valve cuts out, and sand can not be got back in the sleeve pipe, and the top well liquid that does not contain sand, valve and circulation port are got back to the oil jacket annular space again on the process;
(5) put operation through putting on repeatedly, can realize sand is dragged for into sand sediment pipe, take pit shaft out of by oil pipe.
Compared with prior art, beneficial effect of the present invention is:
Good airproof performance of the present invention, the friction between sand bucket and sleeve pipe and the box cupling is few, and long service life effectively guarantees can not enter a large amount of sand grains in the piston cylinder, and the sand ability of taking out of piston is strong, high efficiency.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is the structural representation of horizontal sand shovel in the utility model;
Fig. 3 is the cross-sectional view of the utility model bottom valve valve body.
Reference numeral:
The 1-outage, the 2-piston cylinder, the 3-piston rod, the last valve of 4-, the hard piston of 5-, the soft piston of 6-,
The 7-sand sediment pipe, 8-sand block short circuit, the broken sand of 9-pushes away the sand instrument, and 10-sets upright instrument, the 11-bottom valve,
12-sand shovel, 13-groove, 14-bead, 15-power oil pipe.
The specific embodiment
Below in conjunction with accompanying drawing, structure of the present invention is done detailed description.
Referring to Fig. 1, the invention provides a kind of oil well and drag for the sand system, above the vertical section of sand bucket, be provided with outage 1, the outage below is provided with piston rod 3, and piston rod 3 is provided with valve 4; On the sand bucket horizontal segment,, be provided with piston cylinder 2, hard piston 5, soft piston 6, sand block short circuit 8, broken sand successively and push away sand instrument 9 to the other end from sand sediment pipe 7, on the horizontal segment pump housing, be provided with the instrument of setting upright 10.The well liquid that comes in 8 pairs of pumping of sand block short circuit filters, and can guarantee can not enter a large amount of sand grains in the piston cylinder; Broken sand pushes away sand instrument 9 and the sand grains on the internal surface of sleeve pipe can be scraped off, and simultaneously transfers in the process residual sand shifted onto at the pipe string and inhales the sand mouth; Set upright instrument 10 can reduce sand bucket last put put in and friction between sleeve pipe and the box cupling, increase the service life.The other end that pushes away sand instrument 9 at broken sand is provided with bottom valve 11 and sand shovel 12, and the horizontal sand that is combined into of bottom valve 11 and sand shovel 12 shovels.
Referring to Fig. 2 and Fig. 3, going up valve 4 among the present invention is common ball-and-seat, bottom valve 11 is the ball-and-seat that resets that leads, described bottom valve 11 valve interior wall upper edge valve bodies are axially arranged with three grooves 13, under the situation of dependable flow, play guiding and reset, the bead 14 in the bottom valve is the bakelite ball, can realize normal unlatching and reset good airproof performance.
The step that the present invention drags for the sand method is:
(1) be lowered in the process at pipe string, the broken sand of sand bucket front end pushes away the sand instrument and clears up remaining on the casing wall residual sand, and pushes it to and inhale the sand mouth, horizontal sand shovel contact sand face, and the weight of horizontal segment is supported by centralizer;
(2) when carrying power oil pipe on the tractor hoist, drive piston rod, soft piston and hard piston and rise, at this moment go up valve and close, bottom valve is opened, and carries sand and enter sand sediment pipe, and sand in the sand sediment pipe and well liquid are up because sand proportion is bigger, constantly sink, well liquid rises;
(3) with step (2) simultaneously, the well liquid that the sand block short circuit filter to rise makes sand can only be deposited in the sand sediment pipe;
(4) when tractor hoist is transferred power oil pipe, drive piston rod, soft piston and hard piston and descend, at this moment to go up valve and open, bottom valve cuts out, and sand can not be got back in the sleeve pipe, and the top well liquid that does not contain sand, valve and circulation port are got back to the oil jacket annular space again on the process;
(5) put operation through putting on repeatedly, can realize sand is dragged for into sand sediment pipe, take pit shaft out of by oil pipe.
Claims (5)
1, a kind of oil well drags for the sand system, it is characterized in that: be provided with outage above the piston rod of the vertical section of sand bucket, piston rod is provided with valve; On the sand bucket horizontal segment, from the sand sediment pipe to the other end, be provided with piston cylinder successively, be provided with hard piston, soft piston, sand block short circuit, broken sand behind the piston cylinder and push away the sand instrument, on the horizontal segment pump housing, be provided with the instrument of setting upright, the other end that pushes away the sand instrument at broken sand is provided with bottom valve and sand shovel, and the horizontal sand that is combined into of bottom valve and sand shovel shovels.
2, a kind of oil well according to claim 1 drags for the sand system, it is characterized in that: described upward valve is common ball-and-seat, and bottom valve is the ball-and-seat that resets that leads, and described bottom valve valve interior wall upper edge valve body is axially arranged with three grooves.
3, a kind of oil well according to claim 1 and 2 drags for the sand system, it is characterized in that: the bead in the described bottom valve is the bakelite ball.
4, a kind of oil well according to claim 1 drags for the sand system, it is characterized in that: the described instrument of setting upright is rubber centralizer or rolling wheel centralizer.
5, a kind of oil well according to claim 1 drags for the sand method of dragging for of sand system, it is characterized in that: it is as follows that it drags for the sand step:
(1) be lowered in the process at pipe string, the broken sand of sand bucket front end pushes away the sand instrument and clears up remaining on the casing wall residual sand, and pushes it to and inhale the sand mouth, horizontal sand shovel contact sand face, and the weight of horizontal segment is supported by centralizer;
(2) when carrying power oil pipe on the tractor hoist, drive piston rod, soft piston and hard piston and rise, at this moment go up valve and close, bottom valve is opened, and carries sand and enter sand sediment pipe, and sand in the sand sediment pipe and well liquid are up because sand proportion is bigger, constantly sink, well liquid rises;
(3) with step (2) simultaneously, the well liquid that the sand block short circuit filter to rise makes sand can only be deposited in the sand sediment pipe;
(4) when tractor hoist is transferred power oil pipe, drive piston rod, soft piston and hard piston and descend, at this moment to go up valve and open, bottom valve cuts out, and sand can not be got back in the sleeve pipe, and the top well liquid that does not contain sand, valve and circulation port are got back to the oil jacket annular space again on the process;
(5) put operation through putting on repeatedly, can realize sand is dragged for into sand sediment pipe, take pit shaft out of by oil pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN200810103915XA CN101250994B (en) | 2008-04-11 | 2008-04-11 | Oil well sand-pumping system as well as sand-pumping method thereof |
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CN200810103915XA CN101250994B (en) | 2008-04-11 | 2008-04-11 | Oil well sand-pumping system as well as sand-pumping method thereof |
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CN101250994A true CN101250994A (en) | 2008-08-27 |
CN101250994B CN101250994B (en) | 2010-09-22 |
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Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US6257850B1 (en) * | 1997-03-21 | 2001-07-10 | Kenneth S. Conn | Piston and seals for a reciprocating pump |
CN2479202Y (en) * | 2001-04-29 | 2002-02-27 | 中国石油天然气股份有限公司 | Super-long stroke downhole bailer |
CN201027513Y (en) * | 2007-05-08 | 2008-02-27 | 新疆石油管理局采油工艺研究院 | Spraying bailing bucket |
CN201180524Y (en) * | 2008-04-11 | 2009-01-14 | 安东石油技术(集团)有限公司 | System used for oil well horizontal sand pumping |
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Assignee: Beijing Tongsheng Weier Engineering Technology Co., Ltd. Assignor: Anton Oilfield Services (Group) Ltd. Contract record no.: 2011990000586 Denomination of invention: Oil well sand-pumping system as well as sand-pumping method thereof Granted publication date: 20100922 License type: Exclusive License Open date: 20080827 Record date: 20110711 |