CN1190586C - Hydro-impact broken down method and device for oil-water well - Google Patents
Hydro-impact broken down method and device for oil-water well Download PDFInfo
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- CN1190586C CN1190586C CNB021354790A CN02135479A CN1190586C CN 1190586 C CN1190586 C CN 1190586C CN B021354790 A CNB021354790 A CN B021354790A CN 02135479 A CN02135479 A CN 02135479A CN 1190586 C CN1190586 C CN 1190586C
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Abstract
The present invention discloses a hydraulic impact blockage removing method for oil and water wells and a device of the method, which is suitable for various oil wells and water injection wells in oil industry. The method comprises the steps that the blockage removing device is connected to an oil pipe and is put into a well to be aligned with a stratum with blockage to be removed, and a packer is installed on the upper part of the blockage removing device. Stratum impact in the present invention is realized by that a well repairing device is utilized to lift a plunger in the underground blockage removing device to stratum water in space of an oil ring and a sleeve ring, and the stratum water instantly falls down from a cavity of the blockage removing device to be released. Impact force on the stratum, which is generated by drop height and vacuum negative pressure generated by the method and liquid column pressure in an upper oil pipe, is increased greatly. The device is provided with a travelling valve which is composed of a liquid inlet assembly and a liquid outlet assembly, wherein the liquid inlet assembly and the liquid outlet assembly are connected and assembled by an inner cylinder. The device has the advantages of simple structure, convenient ground job operation, large blockage removing impact force and favorable blockage removing effect, and the frequency of hydraulic impact in one-time job is not limited.
Description
Technical field
The present invention is the oil production method and the oil production equipment of petroleum industry, and particularly a kind of oil-water well hydro-impact broken down method and device are applicable to various water injection wells and oil well, and water filling stratum and the oil reservoir that stops up impacted de-plugging.
Background technology
In the waterflooding extraction process in oil field, oil, well are after long-term exploitation and water filling, influence owing to reasons such as water quality and work measure, cause formation contaminant that oil, well are stopped up near near wellbore zone or water injection hole gradually, cause water injection pressure constantly to rise, do not intake, can not bring into play the effect of displacement of reservoir oil by filling water until annotating, oil well causes permeability decrease because of obstruction, and the not enough production capacity of feed flow descends.For the water injection capacity of replying well and the oil recovery ability of oil well, must carry out de-plugging to the stratum of stopping up, present method for removing blockage mainly contains chemistry and two kinds of methods of physics.The general investment of chemical method is big, complex process, easily secondary pollution is caused on the stratum, the few application to the utmost aborning.At present, the hydro-impact broken down technology is to utilize ground pump truck to pump into the surface water to the down-hole plug-removing device, and plug-removing device is surface water abrupt release, high-velocity fluid is hampered suddenly and forms a kind of physical method of hydraulic blow.Impact producing instantaneous high pressure, this compression wave transmits in pit shaft and oil reservoir hole, produces mechanism and hydraulic action and carries out de-plugging.Mechanism is that pressure acts on the rock, makes its broken crack that produces; Hydraulic action is meant the shock effect on the formed pressure fluctuation of transmission, reflection and the stack stratum of compression wave, it can destroy the cohesive force between plugging particle and the reservoir rock, and oil transportation duct capillary caliber is changed, cause periodicity hypertonic capillaceous, improve the degree of porosity and the permeability of oil reservoir.Because waterpower method for removing blockage general technology is simple, small investment, can implement at any time individual well, uses to be and progressively enlarge trend.Chinese patent 99243846.2 " oil-water well negative pressure plugging removal and stimulation device " has been introduced a kind of impact plug-removing device that improves oil reservoir near wellbore zone seepage flow performance, its operating principle is that the negative pressure of vacuum that the use device cavity produces flows in the tubing string formation fluid stream in the stratum, and the dirt that will stop up stratum and oily discharge orifice road more from bottom to top is expelled to ground by oil pipe.Utilize waterpower to carry out de-plugging comparatively typically high-pressure water jet de-plugging and pitching method for removing blockage in addition step by step.High-pressure water jet plugging removal and stimulation increase water injection technology was published the 39th page-42 pages of in November, 1997 " fault block oil and gas pool ", its method mainly realizes by a kind of high-pressure rotary jet instrument of controllable rotating speed, this instrument radially is furnished with several self-excitation vibration-type jet nozzles, utilizes the High-Pressure Water driven tool rotation of nozzle ejection.After by oil pipe this instrument being delivered to downhole perforation section top together with strainer, one way valve, centralizer during operation, with cementing truck water under high pressure is pumped into the rotating jet generator by oil pipe, one way valve, strainer on ground, nozzle produces radially high-pressure water jet of multiply, the driven tool rotation, the ground car slowly descends drain line simultaneously, make instrument descending limit rotation on the perforated interval limit, radially Pen Chu multiply rotating jet constantly impacts borehole and acts on the stratum, plays the effect of de-plugging." research of hydraulic percussion method de-plugging and application " in " oil drilling technology " fifth phase in 1999 100 pages of-103 pages of publications, introduced pitching method for removing blockage step by step, its instrument mainly is made of multistage impact sheet, its operating process is that the de-plugging instrument is installed in oil pipe bottom G.I.H, aiming at needs the de-plugging stratum, and at top installation packer, the bottom is supported on the shaft bottom with oil pipe.Ground with pump truck in oil pipe perfusion fluid to well head, throw in first bead, pump truck began pressurization after the one-level of obturaging was impacted sheet, when hydraulic pressure is elevated to packer setting pressure, packer setting, and at packer bottom oil, the aerial liquid flow space that forms a sealing of the collar, when pressure continues to be elevated to the strength limit of impacting the sheet explosive valve, the impact sheet throws open, make liquid static in the oil pipe quicken suddenly to enter casing space, produce certain pressure and act directly on the reservoir rock, simultaneously liquid flow in the drive sleeve, affact on tube wall and the reservoir, play and wash away and rolling action.After treating the first class pressure shock wave attenuation, throw second bead again, carry out the second time and impact, impact until final stage and finish, finish a de-plugging operation.Above-mentioned waterpower block releasing technique can effectively be dredged the obstruction of perforation position and its nearly portion, and defective is the impact force deficiency, and removal of bridge formation radially radius is little, and the effect of negative pressure of vacuum very easily destroys near the skeleton on the stratum of pit shaft.The waterpower plug-removing device of oil-water well and method are still needed and are further improved.
Summary of the invention
The objective of the invention is to design a kind of simple to operate; obvious results oil-water well hydro-impact broken down method and device; overcome defective of the prior art; strengthen impact force; the de-plugging radial extension on stratum is increased; can effectively dredge the obstruction of perforation position, stratum and rimland thereof, near the skeleton on the stratum of protection is not damaged to greatest extent again.
The present technique solution can reach above-mentioned purpose: a kind of oil-water well hydro-impact broken down method, plug-removing device is connected on the oil pipe, and G.I.H is aimed at the stratum that needs de-plugging, and in broken down device top packer is installed.Impinge upon earth strata of the present invention is to utilize the plunger in the plug-removing device under the workover rig winding shaft, and suction oil, the aerial formation water of the collar fall to discharging in the instantaneous plug self-removal equipment.
A kind of oil-water well hydro-impact broken down device that is used for said method has travelling valve, is made up of liquid inlet assemblage and liquid outlet assemblage, and liquid inlet assemblage and liquid outlet assemblage are linked and packed by inner core.Water enters from liquid inlet assemblage, from the liquid outlet assemblage ejection, hydro-impact broken down is carried out on the stratum.
The present invention compared with prior art has following advantage and effect: hydraulic blow energy of the present invention is that head of liquid that is produced by liquid own in the tubing string and liquid falls can be changed into by speed rapidly when promoting tubing string pressure the subject of knowledge and the object of knowledge constitute.Can compare by the pressure that ground pump truck perfusion fluid and pressurization in tubing string produce with other waterpower method for removing blockage, impact force heightens.When device by on carry and form one liquid that impacts stream downwards, with the length of spring compressed in the liquid outlet assemblage, open standing valve, powerful liquid stream is by standing valve, fluid hole and perforated interval, the temporary impact stratum forms hammering to the stratum, has strengthened the radially sweep area of oil-water well.The stratum that the pressure of the instantaneous liquid stream of this strand is enough to stop up presses off certain microgrid crack, thereby increases formation porosity, improves permeability, and plugging removal effect is good and period of validity is long.De-plugging tool construction of the present invention is simple, and Ground Operation is easy and simple to handle, has advantages such as hydraulic blow number of times that one-stop operation can carry out is unrestricted.
Description of drawings
Accompanying drawing is the structural representation of plug-removing device among the present invention.
The specific embodiment
Below in conjunction with accompanying drawing further detailed description is done in invention: a kind of oil-water well hydro-impact broken down method, plug-removing device is connected on the oil pipe, G.I.H is aimed at the stratum that needs de-plugging, and in broken down device top packer is installed.Impinge upon earth strata of the present invention is to utilize the plunger in the plug-removing device under the workover rig winding shaft, and suction oil, the aerial formation water of the collar fall to discharging in the instantaneous plug self-removal equipment.Hydraulic blow number of times after plug-removing device is once gone into the well is 1 time, for 2 times or many times, and is unrestricted.Use this method can utilize the workover rig tractor hoist to be connected with plug-removing device by oil pipe, G.I.H is aimed at oil reservoir or water filling interval, and the upper and lower packer setting of using does not have other layer position as the bottom, can be without packer yet.When carrying oil pipe on the tractor hoist and reaching a certain height, OIH, the aerial liquid of the collar just enters in the plug-removing device cavity, forming one liquid stream falls rapidly, owing to propose the effect of the negative pressure of vacuum that forms in the plug-removing device cavity in the process in the oil pipe of top on head of liquid and the tractor hoist, the impact force that forms in the liquid dropping process is with the built-in length of spring compressed of plug-removing device, open standing valve, can act directly on the perforated zone by the fast pressure that can transform and form pressure surge, formation rock and liquid are played the hammering fragmentation, shear, wash away and rolling action, and make rock produce new microgrid crack, realize de-plugging.Drop that this method produces and the head of liquid in negative pressure of vacuum and the top oil pipe heighten to the impact force that the stratum forms.During drain line, the plug-removing device inner spring resets under the tractor hoist, and fluid hole is closed, liquid enters in oil, the cover annular space in the cavity, finishes the once-through operation process, repeatedly the put-on and delegated tubing string, can realize repeatedly hydraulic blow, de-plugging is carried out on the stratum, reach the purpose of increasing yield and injection.For realizing above-mentioned waterpower method for removing blockage, make a kind of oil-water well hydro-impact broken down device that is used for said method, referring to accompanying drawing, this device is made up of liquid inlet assemblage and liquid outlet assemblage, is provided with travelling valve 8, and liquid inlet assemblage and liquid outlet assemblage are linked and packed by inner core 5.Inner core 5 is divided into two parts up and down for dividing body structure, connects with the screw thread assembling.Liquid inlet assemblage is made up of last split, plunger 7 and the travelling valve 8 of urceolus 2, tube connector 3, inner core 5, and travelling valve 8 is loaded in the plunger 7, and plunger 7 is installed in the last split of inner core 5, and tube connector 3 couples together plunger 7 and oil connection 1.Urceolus 2 is installed in outside at tube connector 3 and inner core 5, and urceolus 2, tube connector 3, plunger 7, inner core 5 are hollow tubular structures.The tube wall of urceolus 2 is provided with inlet opening or lead channel 4, be provided with between the split on plunger 7 and the inner core 5 sealing ring 6 several.Liquid outlet assemblage is made up of following split, standing valve 9, the spring 10 of inner core 5, and standing valve 9 and spring 10 are installed on the top of 5 times splits of inner core, and the bottom tube wall of inner core 5 is provided with fluid hole or liquid outlet groove 11.Use the workover rig tractor hoist, this device is connected with oil pipe goes into the well, be positioned the perforated interval of oil-water well with packer.When carrying oil pipe on the tractor hoist, up in inner core 5 by the plunger 7 that oil connection 1 drive tube connector 3 is connected, this moment, travelling valve 8 and standing valve 9 were closed, when the up junction by urceolus 2 and inner core 5 of the travelling valve 8 of plunger 7 lower ends, liquid in oil pipe and the casing annulus is flowed in the inner core 5 by a plurality of radially inlet openings on the urceolus 24, and the liquid that forms one impact downwards flows, with spring 10 compressions, open standing valve 9, thereby open fluid hole 11, liquid stream is by standing valve 9, fluid hole 11 and perforated interval, the temporary impact stratum, the pressure of the instantaneous liquid stream of this strand presses off certain crack with the stratum of stopping up, thereby increases formation porosity, improves permeability.When tractor hoist is transferred tubing string, by tube connector 3, make plunger 7 descending in inner core 5, after plunger 7 passes through the radially inlet opening 4 of urceolus 2, inlet opening 4 is closed, at this moment, the travelling valve 8 of plunger 7 lower ends is opened, pressure in the inner core 5 descends rapidly, spring 10 resets standing valve 9 cuts out, and fluid hole 11 is closed immediately, and the residual liquid in plunger 7 bottom inner cores 5 drains in the oil pipe enter in the cavity of plunger 7 by the travelling valve of opening 8 on, flow in oil, the casing annulus, finish once-through operation.Said process can be realized stopping up the repeatedly hydro-impact broken down on stratum repeatedly.
Claims (7)
1, a kind of oil-water well hydro-impact broken down method, plug-removing device is connected on the oil pipe, G.I.H, aim at the stratum that needs de-plugging, and in broken down device top installation packer, it is characterized in that impinge upon earth strata of the present invention is to utilize the plunger in the plug-removing device under the workover rig winding shaft, suction oil, the aerial formation water of the collar fall to discharging in the instantaneous plug self-removal equipment.
2, a kind of oil-water well hydro-impact broken down method according to claim 1, it is characterized in that hydraulic blow number of times after plug-removing device is once gone into the well be once more than.
3, a kind of hydro-impact broken down device that is used for claim 1 has travelling valve (8), it is characterized in that this device is made up of liquid inlet assemblage and liquid outlet assemblage, and liquid inlet assemblage and liquid outlet assemblage are linked and packed by inner core (5).
4, hydro-impact broken down device according to claim 3 is characterized in that inner core (5) for dividing body structure, is divided into two parts up and down, connects with the screw thread assembling.
5, hydro-impact broken down device according to claim 3, it is characterized in that liquid inlet assemblage is made up of last split, plunger (7) and the travelling valve (8) of urceolus (2), tube connector (3), inner core (5), travelling valve (8) is loaded in the plunger (7), plunger (7) is installed in the last split of inner core (5), and tube connector (3) couples together plunger (7) and oil connection (1); Urceolus (2) is installed outside tube connector (3) and inner core (5).
6, hydro-impact broken down device according to claim 5 is characterized in that urceolus (2), tube connector (3), plunger (7), inner core (5) are hollow tubular structures, and the tube wall of urceolus (2) is provided with inlet opening or lead channel (4); In plunger (7) and inner core (5) go up establish between the split sealing ring (6) several.
7, hydro-impact broken down device according to claim 3, it is characterized in that liquid outlet assemblage descends split, standing valve (9), spring (10) to form by inner core (5), standing valve (9) and spring (10) are installed on the top of split under the inner core (5), and the bottom tube wall of inner core (5) is provided with fluid hole or groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021354790A CN1190586C (en) | 2002-09-13 | 2002-09-13 | Hydro-impact broken down method and device for oil-water well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021354790A CN1190586C (en) | 2002-09-13 | 2002-09-13 | Hydro-impact broken down method and device for oil-water well |
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| CN1401879A CN1401879A (en) | 2003-03-12 |
| CN1190586C true CN1190586C (en) | 2005-02-23 |
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| CNB021354790A Expired - Fee Related CN1190586C (en) | 2002-09-13 | 2002-09-13 | Hydro-impact broken down method and device for oil-water well |
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| CN102305040A (en) * | 2011-08-11 | 2012-01-04 | 中国海洋石油总公司 | Near-well de-plugging device for loose sand heavy oil reservoir |
| US9476295B2 (en) * | 2012-10-15 | 2016-10-25 | Conocophillips Company | Plunger fall time identification method and usage |
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| CN103541713B (en) * | 2013-10-12 | 2016-03-30 | 河南理工大学 | A kind of coal bed gas near wellbore zone chemical plugging removal method |
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| CN105201482B (en) * | 2015-10-20 | 2018-03-09 | 刘杰 | Liquid stream cavitation apparatus, system and method |
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| CN110439548A (en) * | 2019-08-26 | 2019-11-12 | 中海石油(中国)有限公司深圳分公司 | A kind of controllable shock wave de-plugging test macro and test method |
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| CN111577237A (en) * | 2020-05-29 | 2020-08-25 | 中国海洋石油集团有限公司 | Water hammer composite fracturing process method for low-permeability oil field |
| CN112196507B (en) * | 2020-08-12 | 2022-07-01 | 中海油能源发展股份有限公司 | Continuous hydraulic impact tool and operation method |
| CN115434670A (en) * | 2022-09-05 | 2022-12-06 | 山西沁盛煤层气作业有限责任公司 | Coal-bed gas well swabbing negative pressure blockage removal yield increase method |
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