CN101942986A - Abrasive jet injection multiple fracturing device - Google Patents
Abrasive jet injection multiple fracturing device Download PDFInfo
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- CN101942986A CN101942986A CN2010102834955A CN201010283495A CN101942986A CN 101942986 A CN101942986 A CN 101942986A CN 2010102834955 A CN2010102834955 A CN 2010102834955A CN 201010283495 A CN201010283495 A CN 201010283495A CN 101942986 A CN101942986 A CN 101942986A
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Abstract
The invention provides an abrasive jet injection multiple fracturing device. The device comprises multiple stages of spray guns which are connected in series, wherein each spray gun is a hollow cylinder, and at least two nozzles are formed on the side wall of each spray gun; the spray guns comprise a primary bottom spray gun which is arranged on the lower part of the abrasive jet injection device and multiple stages of upper spray guns which are positioned on the upper part of the bottom spray gun; a slide bushing capable of sealing the nozzle of the spray gun in the stage is arranged in each upper spray gun; an accommodating hole for accommodating the nozzle is formed on the side wall of each spray gun; a nozzle cap is sleeved outside the nozzle, and an inner hole of the nozzle cap is matched with the outer wall of the nozzle; the nozzle cap is in threaded connection with the accommodating hole, so that the nozzle is fixed on the side wall of each spray gun; and a splash-proof block is arranged on the outer wall of each spray gun close to the nozzles. The abrasive jet injection multiple fracturing device can effectively prevent splash-return jet from eroding and destroying a spray gun body, prolongs the service life of the spray guns, and simultaneously, reduces the manufacturing cost of the spray guns.
Description
Technical field
The invention relates to a kind of abradant jet and spray the separate stratum fracfturing device, especially a kind of abradant jet that can improve spray gun application life sprays the separate stratum fracfturing device, and this device is specially adapted to the operation in underground mining fields such as oil, natural gas.
Background technology
Low-permeability oil gas field reserves account for 28% of domestic proved reserves, increase the hyposmosis proved reserves every year newly and account for and newly verify more than 50% of gross reserves, and fracturing is an effective way of employing and improve the hyposmosis reserves.Nineteen forty-seven, in a bite peupendicular hole in the HUGOTON gas field in the U.S. KANSAS west and south, implemented the fracturing yield-increasing technology first, passed through the development of nearly half a century, particularly since the end of the eighties in last century, all obtained development rapidly at FRACTURING DESIGN, fracturing fluid and additive, proppant, fracturing unit and aspects such as monitoring instrument and Crack Monitoring.
For accurately controlling crack crack starter location and Number of Fractures, carried out the staged fracturing technical research both at home and abroad.At present, on-the-spot layering (section) fracturing process commonly used mainly contains: limited entry fracture treatment, diverting agent separate stratum fracfturing, mechanical packer separate stratum fracfturing, back-up sand separate stratum fracfturing etc.The shot density that limited entry fracture treatment requires is lower, will hinder the expansion of perforation to effective wellbore radius; Between operational period, excessive pressure may occur in perforation tunnel and entrance, crack and fall, and can influence and take of the distribution of sand fracturing fluid at interlayer; It is less that the current limliting method is carried out the crack inlet area that perforation provides, and at the row of returning and production period, proppant returned out.When the open-hole horizontal well pressure break, the simplest partition method is to use diverting agent, and diverting agent can be used rock salt, benzoic flake or camphor ball etc.But the problem of this method maximum is to be difficult to control the distance that rises along the crack of pit shaft between the knick point; Another important problem is that to be sewn on the filling of the proppant of near wellbore zone in stifled stage counterincision temporarily uncontrollable.Can implement packer layering or staged fracturing technology at cased well, still, construct behind the layer position, the sand card usually takes place in packer, causes down-hole accident.The problem of back-up sand separate stratum fracfturing is that construction period is long.
In recent years, China's high pressure water jet constantly develops, and has all obtained rapid progress at aspects such as cutting, broken rock, borings.In Chinese patent publication number CN100999989A, a kind of high pressure water jet-flow deep penetrating perforating and auxiliary crushing method and device thereof are disclosed, this application is this case applicant's first to file, the basic principle of above-mentioned application is to add a certain proportion of abrasive material (quartz sand commonly used) in the fluid of certain viscosity, thereby formation abradant jet, be forced into 30-40MPa by ground pump truck, be transported to the perforating system of down-hole and nozzle (this device can be determined a layer position and an orientation as required) by oil pipe, penetrating the degree of depth on the stratum is 0.78-1.09 rice, cleaning duct about diameter 20mm; Perhaps mobile tubing string and nozzle are realized slot in the down-hole.The advantage of this technology mainly contains: penetration depth is greater than conventional perforation; Can not cause the oil reservoir compacting injury that resembles the conventional perforation; The aperture of perforate is bigger; Can be according to the requirement of layering and geostatic stress, selectable oriented perforating and slot.This technology has been used more than 10 mouthful of well at the scene, and construction effect is good.
No. the 200510072121.8th, Chinese patent application discloses a kind of " fracture method for horizontal well ", and the main defective of this method is: at the uncontrollable crack of net horizontal section crack starter location, can not realize staged fracturing.In addition, fall discharge capacity by ladder and analyze the eyelet frictional resistance, judge and the feed liquor hole count be difficult to operation during this constructs at the scene thus, thereby cause the diverting agent quantity that drops into inaccurate, effectively the crack that pressed off of shutoff; Moreover the functional reliability of sealing agent also can have a strong impact on pressing off the plugging effect in crack.
On the basis of above-mentioned known technology, this case applicant has proposed a kind of new fracturing process and device, and be documented in No. the 200710179500.6th, the Chinese patent application, the method and the device of a kind of abradant jet downhole perforation, kerf multiple fracturing have been set forth, this method is collection abrasive material perforation, waterpower packing and fracturing integrated new technology, though need not be lowered to mechanical packer, but after each pressure break is finished an interval, need mobile down-hole string, therefore need dismantle, install well head repeatedly, working procedure is comparatively loaded down with trivial details.
And in No. 200910082408.7 Chinese patent application that this case applicant proposes, disclose a kind of " abrasive blasting device and abradant jet perforation, separate stratum fracfturing method ", this abrasive blasting device has the spray gun that plural serial stage connects; Described spray gun is hollow column, and its sidewall is provided with at least two nozzles; A packer is all established in the bottom of described every grade of spray gun, and the sidewall of described packer is provided with the sealing shroud that can expand to the outside under the effect of highly pressurised liquid; Described spray gun comprises the first order bottom spray gun that is located at described abrasive blasting device bottom, and the multistage top spray gun that is positioned at spray gun top, bottom, wherein be equipped with the sliding sleeve that can seal this grade spray tip and sealing shroud in each top spray gun, and described sliding sleeve can slide onto the bottom of described sealing shroud under external force, opens described nozzle and sealing shroud.In this known technology, packer and sliding sleeve interlock, before cutting off, pin is in contraction state, in case steel ball reaches the seal receptacle of sliding sleeve end, pin is cut off, sliding sleeve moves, the piston boit that links to each other with the packer resilient sleeve contact with highly pressurised liquid, and this moment, the packer resilient sleeve drove the expansion of packing sealing shroud under the promotion of piston boit, thereby seals annular space between spray gun and the sleeve pipe, prevent that fluid from passing through.After anterior layer position pressure break is finished, drop into the big slightly ball of diameter, open the upper level sliding sleeve, the blocking high-pressure fluid can not flow downward by this grade spray gun more simultaneously.Though by adopting multistage spray gun series connection and multistage sliding sleeve being set, having realized being lowered to a tubing string, this known technology just can implement the separate stratum fracfturing that waterpower packing and mechanical packing combine in a plurality of precalculated positions.But still the defective that exists complex structure, spray gun to be easy to damage.
Summary of the invention
The purpose of this invention is to provide a kind of abrasive jet separate stratum fracfturing device, especially a kind ofly do not need mobile tubing string, need not the conventional mechanical packer, be lowered to the one-stop operation tubing string, need do not move and to implement separate stratum fracfturing in a plurality of precalculated positions in a bite well, and can improve the spray gun abrasive jet separate stratum fracfturing device in application life.
For this reason, the present invention proposes a kind of abradant jet and sprays the separate stratum fracfturing device, has the spray gun that plural serial stage connects; Described spray gun is hollow column, and its sidewall is provided with at least two nozzles; Described spray gun comprises the first order bottom spray gun that is located at described abrasive blasting device bottom, and the multistage top spray gun that is positioned at spray gun top, bottom, wherein be equipped with the sliding sleeve that can seal this grade spray tip in each top spray gun, and described sliding sleeve under external force can slippage in described spray gun, opens described nozzle; It is characterized in that, described spray gun sidewall is provided with the containing hole of ccontaining described nozzle, one nozzle pressure cap is set in the outside of described nozzle, its endoporus matches with the outer wall of described nozzle, and described nozzle pressure cap is fixed on described nozzle on the sidewall of described spray gun by being threaded with described containing hole; Be provided with the splashproof piece near the lateral wall of the described spray gun the described nozzle, described splashproof piece covers on the described nozzle pressure cap, and has the through hole concentric with the jet of described nozzle.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, described containing hole forms the hole enlargement hole of diameter greater than described nozzle pressure cap external diameter towards a side of spray gun lateral wall, and described splashproof piece is contained in the described hole enlargement hole.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, the degree of depth in described hole enlargement hole matches with the outer peripheral edges thickness of described splashproof piece, and described splashproof piece is bonded and fixed in the described hole enlargement hole.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, described splashproof piece is first-class chunk body.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, the central portion thickness of described splashproof piece is greater than outer peripheral edges thickness.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, described nozzle is tapered, the internal taper hole of the endoporus of described nozzle pressure cap for matching with described nozzle.
Aforesaid abradant jet sprays the separate stratum fracfturing device, wherein, is coated with adhesive/sealant between described nozzle and the nozzle pressure cap.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, described nozzle is made by composite ceramic material.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, one side bellmouth section constitutes the jet of described nozzle by the straight hole section with towards the spray gun center.
Aforesaid abradant jet sprays the separate stratum fracfturing device, and wherein, described splashproof piece is made by Hardmetal materials.
Abrasive jet separate stratum fracfturing device of the present invention, be provided with by wear-resistant ability by periphery and be higher than the splashproof piece that the carbide alloy of spray gun body is made at the nozzle pressure cap, in the spraying operation process of spray guns at different levels, prevented to efficiency to return the erosion attack of sputter stream to the spray gun body, improve the application life of spray gun, also reduced the manufacturing cost of spray gun simultaneously.
Adopted awl to cooperate between nozzle of the present invention and the nozzle pressure cap, and at conical surface coating adhesive/sealant, during construction, high-pressure fluid sprays by nozzle, under the effect of fluid pressure, can press the conical surface more tight, be connected compactness and firmness with nozzle thereby increased the nozzle pressure cap.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is the structural representation that abradant jet of the present invention sprays separate stratum fracfturing device first order bottom spray gun;
Fig. 2 is the structural representation that abradant jet of the present invention sprays separate stratum fracfturing device tops at different levels spray gun, is the spray gun closed condition;
Fig. 3 is the structural representation that abradant jet of the present invention sprays separate stratum fracfturing device tops at different levels spray gun, is the spray gun opening;
Fig. 4 is the nozzle arrangements schematic diagram that abradant jet of the present invention sprays the separate stratum fracfturing device;
Fig. 5 is the nozzle pressure cap structural representation that abradant jet of the present invention sprays the separate stratum fracfturing device;
Fig. 6 is nozzle and nozzle pressure cap assembled state schematic diagram;
Fig. 7 A, Fig. 7 B are the structural representations that abradant jet of the present invention sprays the splashproof piece of separate stratum fracfturing device, and wherein, Fig. 7 A is that the master looks schematic diagram, and Fig. 7 B is a generalized section;
Fig. 8 A, Fig. 8 B, Fig. 8 C are the spray gun working state schematic representations at different levels that abradant jet of the present invention sprays the separate stratum fracfturing device, wherein, Fig. 8 A is that first order spray gun is in running order, and Fig. 8 B is that second level spray gun is in running order, and Fig. 8 C is that third level spray gun is in running order.
The drawing reference numeral explanation:
1, first order bottom spray gun 2, top spray gun 21, sliding sleeve 22, pin
3, nozzle 30, containing hole 31, nozzle pressure cap 32, jet 33, hole enlargement hole
4, splashproof piece 41, through hole 5, tubing nipple 6, one way valve
7, antipriming pipe 8, guide head 81, through hole 9, steel ball
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
Fig. 1 is the structural representation that abradant jet of the present invention sprays separate stratum fracfturing device first order bottom spray gun; Fig. 2 is the structural representation that abradant jet of the present invention sprays separate stratum fracfturing device tops at different levels spray gun, is the spray gun closed condition; Fig. 3 is the structural representation that abradant jet of the present invention sprays separate stratum fracfturing device tops at different levels spray gun, is the spray gun opening; Fig. 4 is the nozzle arrangements schematic diagram that abradant jet of the present invention sprays the separate stratum fracfturing device; Fig. 5 is the nozzle pressure cap structural representation that abradant jet of the present invention sprays the separate stratum fracfturing device; Fig. 6 is nozzle and nozzle pressure cap assembled state schematic diagram; Fig. 7 A, Fig. 7 B are the structural representations that abradant jet of the present invention sprays the splashproof piece of separate stratum fracfturing device, and wherein, Fig. 7 A is that the master looks schematic diagram, and Fig. 7 B is a generalized section.As shown in the figure, abradant jet of the present invention sprays the separate stratum fracfturing device, comprise the spray gun that plural serial stage connects, the progression of concrete spray gun is fractured layer bit quantity and deciding as required, be that example describes with three grades of spray guns fracturing device that constitutes that is connected in series in the present embodiment, be connected by tubing nipple 5 between the spray guns at different levels, the one-level spray gun of topmost is connected with oil pipe.According to the well depth position of setting for the treatment of fractured interval, regulate distance between the spray guns at different levels by described tubing nipple.
Please cooperate referring to Fig. 1-Fig. 6, the abradant jet that the present invention proposes sprays the separate stratum fracfturing device, has the spray gun that plural serial stage connects, described spray gun is hollow column, its sidewall is provided with at least two nozzles 3, the quantity of nozzle 3 is set, and mutual alignment and spacing between each nozzle 3 are provided with as required.Described spray gun comprises the first order bottom spray gun 1 that is located at described abrasive blasting device bottom, and the multistage top spray gun 2 that is positioned at spray gun top, bottom, wherein be equipped with the sliding sleeve 21 that can seal this grade spray tip in each top spray gun 2, and described sliding sleeve 21 under external force can slippage in described spray gun 2, opens described nozzle 3.Wherein, described spray gun sidewall is provided with the containing hole 30 of ccontaining described nozzle, one nozzle pressure cap 31 is set in the outside of described nozzle 3, the endoporus 310 of nozzle pressure cap 31 matches with the outer wall of described nozzle 3, and described nozzle pressure cap 31 is fixed on described nozzle 3 on the sidewall of described spray gun by being threaded with described containing hole 30.Be provided with splashproof piece 4 near the lateral wall of the described spray gun the described nozzle 3, described splashproof piece 4 covers on the described nozzle pressure cap 31, and has the through hole 41 concentric with the jet 32 of described nozzle 3.
Described containing hole 30 forms the hole enlargement hole 33 of diameter greater than described nozzle pressure cap 31 external diameters towards a side of spray gun lateral wall, and described splashproof piece 4 is contained in the described hole enlargement hole 33.The degree of depth in described hole enlargement hole 33 matches with the outer peripheral edges thickness of described splashproof piece 4, and described splashproof piece 4 is bonded and fixed in the described hole enlargement hole 33.When described splashproof piece 4 was the block of a uniform thickness, it is concordant with the spray gun outside wall surface that splashproof piece 4 is entrenched in 33 interior its surfaces, hole enlargement hole.In another preferred embodiment, shown in Fig. 7 A, 7B, described splashproof piece 4 can be made the thickness of central portion thickness greater than outer peripheral edges, in the time of in splashproof piece 4 is entrenched in hole enlargement hole 33, the spray gun outside wall surface is protruded at the middle part of splashproof piece 4, with the protective action of further raising to the spray gun outside wall surface.
In order to make nozzle pressure cap 31 tight more, firm with being connected of nozzle 3, the profile of described nozzle 3 is made taper, the endoporus 310 of described nozzle pressure cap 31 is the internal taper hole for matching with described nozzle 3 then.During installation, on the male cone (strobilus masculinus) of the inner conical surface of nozzle pressure cap 31 and described nozzle 3, all apply adhesive/sealant, as high-intensity glue, to guarantee good seal between the two, during construction, high-pressure fluid sprays by nozzle, can press the conical surface more tight under the effect of fluid pressure.
The jet 32 of nozzle 3 of the present invention constitutes by the straight hole section with towards the bellmouth section of spray gun center one side, and this structure can reduce energy dissipation behind the jet exit, improves the perforating depth in the stratum.
Described splashproof piece 4 is made by the Hardmetal materials that wear-resistant ability is higher than the spray gun body.Described nozzle 3 is made by the higher composite ceramic material of anti-wear performance, thereby can guarantee by after the more proppant, and is less to the wearing and tearing of nozzle 3.
Fig. 8 A, Fig. 8 B, Fig. 8 C are the spray gun working state schematic representations at different levels that abradant jet of the present invention sprays the separate stratum fracfturing device, wherein, Fig. 8 A is that first order spray gun is in running order, and Fig. 8 B is that second level spray gun is in running order, and Fig. 8 C is that third level spray gun is in running order.
Please cooperate referring to Fig. 8, Fig. 8 A, Fig. 8 B, Fig. 8 C spray the schematic diagram that the separate stratum fracfturing device is worked successively with the cover abradant jet that three grades of spray gun series connection constitute in well.Described spray gun is called first order bottom spray gun 1, the second level and third level top spray gun 2 from bottom to top.Wherein, for fear of or reduce described fracturing device mechanical admixture in the pit shaft in the process of going into the well and enter in spray gun and the oil pipe, be provided with one way valve in the bottom of first order spray gun.And when the anti-circulation well cleanup of needs annular space, this moment, spray guns at different levels all were in off working state, and pumping liquid in the annular space between pit shaft and oil pipe, this liquid can be opened one way valve 6 and enter in spray guns at different levels and the oil pipe, implement anti-circulation well cleanup.In addition, fracturing device of the present invention, the bottom of first order bottom spray gun is connected with antipriming pipe 7 and guide head 8 in turn, the bottom of described guide head 8 has bigger chamfering structure, can avoid by the tool string that multistage spray gun the constitutes borehole wall that scratches in the process of going into the well by this guide head 8 that is installed in foot, and the through hole 81 that connects with its bottom on the guide head 8 provides passage for anti-circulation well cleanup.
Operating principle of the present invention is: by plain tubing the abradant jet injection separate stratum fracfturing device of being made up of plural serial stage connection spray gun shown in Figure 8 is sent to designated layer position in the well.Spacing between the spray guns at different levels is regulated by tubing nipple 5 according to the depth for the treatment of fractured interval of design.Spray the perforating fluid of certain sand ratio of separate stratum fracfturing unit feeding pressurization to abradant jet by oil pipe, the nozzle 3 of described perforating fluid spray gun 1 bottom the wherein one-level of described fracturing device forms the eyelet of the certain diameter and the degree of depth to the stratum high velocity jet in the stratum; Close the oil jacket annular space subsequently, and pump into base fluid, keep annular pressure, improve proppant concentration simultaneously and continue to pass through nozzle ejection a little less than formation fracture pressure from annular space.
After the layer position pressure break of first order bottom spray gun 1 correspondence was finished, termination of pumping was opened oil pipe and is dropped into steel ball 9 downwards, when steel ball 9 arrives sliding sleeve 21 in top, the second level spray guns 2, fixedly the pin 22 of sliding sleeve is cut off, and sliding sleeve 21 moves down, nozzle 3 on this grade spray gun 2 and the channel connection between the oil pipe.Owing to seal between the ball seat on steel ball 9 and the sliding sleeve 21, perforating fluid can not flow into first order bottom spray gun 1 downwards; After spray gun 1 sealing of first order bottom, repeat above-mentioned perforation step, after top, second level spray gun 2 is finished this interval pressure break, oil pipe is opened in termination of pumping, drop into the big slightly steel ball 9 of diameter again to third level top spray gun 2, open the sliding sleeve 21 that sets within it, repeat perforation, pressure break step.
Owing to the splashproof piece of being made by carbide alloy 4 is installed in the periphery of spray gun top nozzle pressure cap 31, therefore in the spraying operation process of spray guns at different levels, prevented to return the erosion attack of sputter stream to the spray gun body effectively, in the application life of having improved spray gun, the while has also been reduced the manufacturing cost of spray gun.
The above only is the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (10)
1. an abradant jet sprays the separate stratum fracfturing device, has the spray gun that plural serial stage connects; Described spray gun is hollow column, and its sidewall is provided with at least two nozzles; Described spray gun comprises the first order bottom spray gun that is located at described abrasive blasting device bottom, and the multistage top spray gun that is positioned at spray gun top, bottom, wherein be equipped with the sliding sleeve that can seal this grade spray tip in each top spray gun, and described sliding sleeve under external force can slippage in described spray gun, opens described nozzle; It is characterized in that, described spray gun sidewall is provided with the containing hole of ccontaining described nozzle, one nozzle pressure cap is set in the outside of described nozzle, its endoporus matches with the outer wall of described nozzle, and described nozzle pressure cap is fixed on described nozzle on the sidewall of described spray gun by being threaded with described containing hole; Be provided with the splashproof piece near the lateral wall of the described spray gun the described nozzle, described splashproof piece covers on the described nozzle pressure cap, and has the through hole concentric with the jet of described nozzle.
2. abradant jet as claimed in claim 1 sprays the separate stratum fracfturing device, it is characterized in that described containing hole forms the hole enlargement hole of diameter greater than described nozzle pressure cap external diameter towards a side of spray gun lateral wall, and described splashproof piece is contained in the described hole enlargement hole.
3. abradant jet as claimed in claim 2 sprays the separate stratum fracfturing device, it is characterized in that the degree of depth in described hole enlargement hole matches with the outer peripheral edges thickness of described splashproof piece, and described splashproof piece is bonded and fixed in the described hole enlargement hole.
4. abradant jet as claimed in claim 2 sprays the separate stratum fracfturing device, it is characterized in that described splashproof piece is first-class chunk body.
5. abradant jet as claimed in claim 2 sprays the separate stratum fracfturing device, it is characterized in that the central portion thickness of described splashproof piece is greater than outer peripheral edges thickness.
6. spray the separate stratum fracfturing device as each described abradant jet of claim 1 to 5, it is characterized in that described nozzle is tapered, the internal taper hole of the endoporus of described nozzle pressure cap for matching with described nozzle.
7. spray the separate stratum fracfturing device as each described abradant jet of claim 1 to 5, it is characterized in that, be coated with adhesive/sealant between described nozzle and the nozzle pressure cap.
8. abradant jet as claimed in claim 1 sprays the separate stratum fracfturing device, it is characterized in that described nozzle is made by composite ceramic material.
9. abradant jet as claimed in claim 1 sprays the separate stratum fracfturing device, it is characterized in that one side bellmouth section constitutes the jet of described nozzle by the straight hole section with towards the spray gun center.
10. abrasive material as claimed in claim 1 is penetrated to annotate and is sprayed the separate stratum fracfturing device, it is characterized in that described splashproof piece is made by Hardmetal materials.
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| CN2010102834955A CN101942986A (en) | 2010-09-16 | 2010-09-16 | Abrasive jet injection multiple fracturing device |
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| CN2010102834955A CN101942986A (en) | 2010-09-16 | 2010-09-16 | Abrasive jet injection multiple fracturing device |
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| CN102839956A (en) * | 2011-06-22 | 2012-12-26 | 中国石油化工股份有限公司 | Sliding sleeve type crushing assembly, device using assembly and using method of device |
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| CN102943659A (en) * | 2012-11-09 | 2013-02-27 | 中超联合能源科技（北京）有限公司 | Hydraulic pump oil production method and hydraulic pump |
| CN103573242A (en) * | 2013-10-16 | 2014-02-12 | 中国石油集团渤海钻探工程有限公司 | Sliding sleeve spray nozzle for open hole fracturing |
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| CN106968648A (en) * | 2017-03-14 | 2017-07-21 | 咸阳川庆鑫源工程技术有限公司 | A kind of wear-resisting nonmetallic double helix hydraulic ejector |
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| CN111255425A (en) * | 2018-11-30 | 2020-06-09 | 中国石油化工股份有限公司 | Nozzle for hydraulic jet fracturing |
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| CN112855092A (en) * | 2019-11-12 | 2021-05-28 | 中国石油化工股份有限公司 | Downhole operation method and perforation short joint for separate production and separate injection |
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