CN106639968A - Multi-cluster infinite-order well cementation segmentation fracturing string and fracturing method - Google Patents
Multi-cluster infinite-order well cementation segmentation fracturing string and fracturing method Download PDFInfo
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- CN106639968A CN106639968A CN201510725756.7A CN201510725756A CN106639968A CN 106639968 A CN106639968 A CN 106639968A CN 201510725756 A CN201510725756 A CN 201510725756A CN 106639968 A CN106639968 A CN 106639968A
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Abstract
The invention discloses a multi-cluster infinite-order well cementation segmentation fracturing string and fracturing method. The fracturing string is formed by connecting a float shoe, a float collar, a differential pressure sliding sleeve and multiple stages of fracturing units through casing pipes from bottom to top, wherein each stage of the fracturing unit comprises multiple groups of multi-cluster fracturing sliding sleeves. According to the multi-cluster infinite-order well cementation segmentation fracturing string and fracturing method, by putting a specialized opening tool into each stage of the fracturing unit, multiple groups of multi-cluster fracturing sliding sleeves can be opened one by one in each stage of the fracturing unit; the fracturing order is not limited, any-order fracturing can be achieved, multiple main cracks can be formed by opening multiple groups of multi-cluster fracturing sliding sleeves in each stage of the fracturing unit, and meanwhile infinite-order fracturing and multi-cluster fracturing are achieved; a complex crack network can be formed, the discharge volume of an oil reservoir can be effectively increased, the fracturing transformation effect can be greatly improved, and the method is a key technique for effective development of low-permeability oil and gas reservoirs.
Description
Technical field
Invention is related to a kind of well-cementing staged-fracturing tubing string and fracturing process in wellfracturing field of engineering technology, particularly a kind of many cluster infinite stages well-cementing staged-fracturing tubing strings and fracturing process.
Background technology
Horizontal cementing staged fracturing technology is one of main completion technique of Low permeable oil and gas reservoirs, at present the technology is applied to the main of scene includes two kinds of technologies, one kind is that pumping bridging plug perforation connection makees staged fracturing technology, and another kind is that coiled tubing drags packer staged fracturing technology.Pumping bridging plug perforation connection makees staged fracturing technology long construction period, and the later stage also needs to bore bridging plug and removes, and construction is complicated；Coiled tubing drags packer staged fracturing technology construction risk greatly, there is card tubing string hidden danger.Although in addition, two kinds of technology pressure break series are unrestricted, being capable of achieving infinite stages pressure break, many cluster pressure breaks can not be realized, a major fracture is can be only formed in every one-level fractured interval, greatly limit the effect of reservoir reconstruction.
The content of the invention
The purpose of the present invention is the problem existed for prior art, there is provided a kind of simultaneously to realize infinite stages pressure break and many cluster pressure breaks and many cluster infinite stages well-cementing staged-fracturing tubing strings and fracturing process of many cracks can be formed in every one-level pressure break unit.
The technical solution adopted for the present invention to solve the technical problems includes：
A kind of many cluster infinite stages well-cementing staged-fracturing tubing strings, float shoe, float collar, pressure reduction sliding sleeve and multistage fracturing unit are formed from bottom to top by sleeve pipe connection, include one group of many cluster fracturing sliding bush of A types and many cluster fracturing sliding bushs of multigroup Type B in every grade of pressure break unit, many cluster fracturing sliding bush outsides pressure transmission pipeline is sequentially connected, and passes through the special opening instrument of input inside many cluster fracturing sliding bushs respectively and opens one by one.
Wherein：The many cluster fracturing sliding bushs of A types are made up of top connection, outer tube, inner sleeve, piston, the seat that builds the pressure, cradle and lower contact, the stroke that axially punches wherein on outer tube constitutes feed pathway and pressure transmission passage, outer tube is provided with radial direction pressure break passage, outer tube and inner sleeve are connected by shear pin, inside put and be provided with radial direction inlet opening, cradle is threaded connection with inner sleeve；The many cluster fracturing sliding bushs of Type B are made up of top connection, outer tube, inner sleeve, piston, the seat that builds the pressure, cradle and lower contact, the punching wherein on outer tube constitutes continuous pressure transmission passage, outer tube is provided with radial direction pressure break passage, outer tube and inner sleeve are connected by shear pin, inside put and be provided with radial direction inlet opening, cradle is threaded connection with inner sleeve.
Pressure reduction sliding sleeve is made up of top connection, lower contact and sliding sleeve, and wherein top connection is provided with axial pressure transmission passage and radial direction pressure break passage, and sliding sleeve is fixed in top connection by shear pin, and top connection and lower contact are threaded connection.
Special opening instrument is made up of glue umbrella, decylization, central block, wherein decylization is fixed on central block by shear pin, it is identical with the number of many cluster fracturing sliding bushs of Type B included in every grade of pressure break unit per the only quantity of decylization needed for special opening instrument, need to be identical with the series of pressure break unit with the quantity of special opening instrument.
The present invention gives the fracturing process according to aforesaid many cluster infinite stages well-cementing staged-fracturing tubing strings simultaneously, comprises the following steps：
（a）After the completion of casing cementing operation, the pressure reduction sliding sleeve of bottom, then sand fracturing are opened by way of well head is suppressed first；
（b）After the completion of pressure break, special opening instrument is put into, many cluster fracturing sliding bushs of A types and many cluster fracturing sliding bushs of multigroup Type B in the 1st grade of pressure break unit, sand fracturing are opened successively；
（c）Repeat step（b）, carry out the 2nd grade of pressure break unit pressure break;
（d）Continue repeat step（b）, until completing the fracturing work of whole pressure break units.
The present invention has following beneficial effect：（1）Achievable infinite stages pressure break, pressure break series is not limited by pressure break tool sizes；（2）Many cluster pressure breaks are capable of achieving, many cracks can be formed in every one-level pressure break unit, improve fracturing transformation effect；（3）Enter interior tubing string under not needing, construction technology is simple, and construction risk is little, short construction period.
Description of the drawings
Fig. 1 is a kind of structural representation of many cluster infinite stages well-cementing staged-fracturing tubing strings of the present invention.
Fig. 2 is the structural representation of many cluster fracturing sliding bushs of A types in the present invention.
Fig. 3 is the structural representation of many cluster fracturing sliding bushs of Type B in the present invention.
Fig. 4 is the structural representation of pressure reduction sliding sleeve in the present invention.
Fig. 5 is the structural representation of special opening instrument in the present invention.
Fig. 6 is the connection diagram of pressure transmission pipeline in the present invention.
In figure：1, sleeve pipe, 2, the many cluster fracturing sliding bushs of A types of 3rd level pressure break unit, 3, the many cluster fracturing sliding bushs of first Type B of 3rd level pressure break unit, 4, the many cluster fracturing sliding bushs of second Type B of 3rd level pressure break unit, 5, the many cluster fracturing sliding bushs of A types of the 2nd grade of pressure break unit, 6, the many cluster fracturing sliding bushs of first Type B of the 2nd grade of pressure break unit, 7, the many cluster fracturing sliding bushs of second Type B of the 2nd grade of pressure break unit, 8, the many cluster fracturing sliding bushs of A types of the 1st grade of pressure break unit, 9, the many cluster fracturing sliding bushs of first Type B of the 1st grade of pressure break unit, 10, the many cluster fracturing sliding bushs of second Type B of the 1st grade of pressure break unit, 11, pressure reduction sliding sleeve, 12, float collar, 13, float shoe, 14, pressure transmission pipeline, 2-1, the top connection of many cluster fracturing sliding bushs of A types, 2-2, the outer tube of many cluster fracturing sliding bushs of A types, 2-3, the inner sleeve of many cluster fracturing sliding bushs of A types, 2-4, the feed pathway of many cluster fracturing sliding bushs of A types, 2-5, the pressure break passage of many cluster fracturing sliding bushs of A types, 2-6, the shear pin of many cluster fracturing sliding bushs of A types, 2-7, the inlet opening of many cluster fracturing sliding bushs of A types, 2-8, the piston of many cluster fracturing sliding bushs of A types, 2-9, the seat that builds the pressure of many cluster fracturing sliding bushs of A types, 2-10, the cradle of many cluster fracturing sliding bushs of A types, 2-11, the pressure transmission passage of many cluster fracturing sliding bushs of A types, 2-12, the lower contact of many cluster fracturing sliding bushs of A types, 3-1, the top connection of many cluster fracturing sliding bushs of Type B, 3-2, the outer tube of many cluster fracturing sliding bushs of Type B, 3-3, the inner sleeve of many cluster fracturing sliding bushs of Type B, 3-4, the pressure break passage of many cluster fracturing sliding bushs of Type B, 3-5, the shear pin of many cluster fracturing sliding bushs of Type B, 3-6, the inlet opening of many cluster fracturing sliding bushs of Type B, 3-7, the piston of many cluster fracturing sliding bushs of Type B, 3-8, the seat that builds the pressure of many cluster fracturing sliding bushs of Type B, 3-9, the cradle of many cluster fracturing sliding bushs of Type B, 3-10, the pressure transmission passage of many cluster fracturing sliding bushs of Type B, 3-11, the lower contact of many cluster fracturing sliding bushs of Type B, 4-1, the top connection of pressure reduction sliding sleeve, 4-2, the pressure transmission passage of pressure reduction sliding sleeve, 4-3, the sliding sleeve of pressure reduction sliding sleeve, 4-4, the shear pin of pressure reduction sliding sleeve, 4-5, the pressure break passage of pressure reduction sliding sleeve, 4-6, the lower contact of pressure reduction sliding sleeve, 5-1, the glue umbrella of special opening instrument, 5-2, the decylization of special opening instrument, 5-3, the shear pin of special opening instrument, 5-4, the decylization of special opening instrument, 5-5, the shear pin of special opening instrument, 5-6, the central block of special opening instrument.
Specific embodiment
A kind of many cluster infinite stages well-cementing staged-fracturing tubing strings, the fracturing string is by float shoe 13, float collar 12, pressure reduction sliding sleeve 11, multistage fracturing unit is formed from bottom to top by the connection of sleeve pipe 1, the quantity of multistage fracturing unit is unrestricted, wherein including one group of many cluster fracturing sliding bush of A types and many cluster fracturing sliding bushs of multigroup Type B in every grade of pressure break unit, many cluster fracturing sliding bushs are opened one by one by throwing in special opening instrument.
The many cluster fracturing sliding bushs of A types are made up of top connection 2-1, outer tube 2-2, inner sleeve 2-3, piston 2-8, a 2-9 that builds the pressure, cradle 2-10 and lower contact 2-12, wherein feed pathway 2-4 and pressure transmission passage 2-11 punches formation on outer tube 2-2, outer tube 2-2 is provided with pressure break passage 2-5, outer tube 2-2 and inner sleeve 2-3 are connected by shear pin 2-6, inner sleeve 2-3 is provided with inlet opening 2-7, and cradle 2-10 is threaded connection with inner sleeve 2-3.
The many cluster fracturing sliding bushs of Type B are made up of top connection 3-1, outer tube 3-2, inner sleeve 3-3, piston 3-7, a 3-8 that builds the pressure, cradle 3-9 and lower contact 3-11, wherein pressure transmission passage 3-10 punches formation on outer tube 3-2, outer tube 3-2 is provided with pressure break passage 3-4, outer tube 3-2 and inner sleeve 3-3 are connected by shear pin 3-5, inner sleeve 3-3 is provided with inlet opening 3-6, and cradle 3-9 is threaded connection with inner sleeve 3-3.
Pressure reduction sliding sleeve 11 is made up of top connection 4-1, lower contact 4-6 and sliding sleeve 4-3, and wherein top connection is provided with pressure transmission passage 4-2 and pressure break passage 4-5, sliding sleeve 4-3 are fixed on top connection 4-1 by shear pin 4-4, and top connection 4-1 and lower contact 4-6 are threaded connection.
Special opening instrument is made up of glue umbrella 5-1, decylization, central block 5-6, wherein decylization is fixed on central block 5-6 by shear pin, it is identical with the number of many cluster fracturing sliding bushs of Type B included in every grade of pressure break unit per the only quantity of decylization needed for special opening instrument, need to be identical with the series of pressure break unit with the quantity of special opening instrument.
Fracturing string outer wall is provided with pressure transmission pipeline 14.
Using a kind of fracturing process of many cluster infinite stages well-cementing staged-fracturing tubing strings, comprise the following steps：
（a）After the completion of casing cementing operation, the pressure reduction sliding sleeve 11 of bottom, then sand fracturing are opened by way of well head is suppressed first；
（b）After the completion of pressure break, special opening instrument is put into, many cluster fracturing sliding bushs of A types and many cluster fracturing sliding bushs of multigroup Type B in the 1st grade of pressure break unit, sand fracturing are opened successively；
（c）Repeat step（b）, carry out the 2nd grade of pressure break unit pressure break;
（d）Continue repeat step（b）, until completing the fracturing work of whole pressure break units.
With reference to Figure of description, the present invention is further illustrated：
Many cluster infinite stages well-cementing staged-fracturing tubing strings described in the present embodiment are capable of achieving 3 grades of staged fracturings of many clusters, as shown in Figure 1, by float shoe 13, float collar 12, pressure reduction sliding sleeve 11,3 grades of pressure break units are formed from bottom to top by the connection of sleeve pipe 1, include many cluster fracturing sliding bushs 8 of one group of A type and many cluster fracturing sliding bushs 9,10 of 2 groups of Type Bs in 1st grade of pressure break unit, include many cluster fracturing sliding bushs 5 of one group of A type and many cluster fracturing sliding bushs 6,7 of 2 groups of Type Bs in 2nd grade of pressure break unit, many cluster fracturing sliding bushs 2 of one group of A type and many cluster fracturing sliding bushs 3,4 of 2 groups of Type Bs are included in 3rd level pressure break unit.
Fracturing string outer wall is provided with pressure transmission pipeline 14, and as shown in Figure 6, the pressure transmission passage 4-2 of pressure reduction sliding sleeve 11 is connected with the pressure transmission passage 3-10 of many cluster fracturing sliding bushs 10 of the second Type B of the 1st grade of pressure break unit by pressure transmission pipeline 14；In every grade of pressure break unit, the pressure transmission passage 2-11 of many cluster fracturing sliding bushs of A types is connected by pressure transmission pipeline 14 with the pressure transmission passage 3-10 of many cluster fracturing sliding bushs of the first Type B, and the pressure transmission passage 3-10 of many cluster fracturing sliding bushs of the first Type B is connected by pressure transmission pipeline 14 with the pressure transmission passage 3-10 of many cluster fracturing sliding bushs of the second Type B；Feed pathway 2-4 of many cluster fracturing sliding bushs 8 of A types of the 1st grade of pressure break unit is connected by pressure transmission pipeline 14 with the pressure transmission passage 3-10 of many cluster fracturing sliding bushs 7 of the second Type B of the 2nd grade of pressure break unit, and feed pathway 2-4 of many cluster fracturing sliding bushs 5 of A types of the 2nd grade of pressure break unit is connected by pressure transmission pipeline 14 with the pressure transmission passage 3-10 of many cluster fracturing sliding bushs 4 of the second Type B of 3rd level pressure break unit.
The many cluster fracturing sliding bushs 2,5,8 of A types are made up of top connection 2-1, outer tube 2-2, inner sleeve 2-3, piston 2-8, a 2-9 that builds the pressure, cradle 2-10 and lower contact 2-12, wherein feed pathway 2-4 and pressure transmission passage 2-11 punches formation on outer tube 2-2, outer tube 2-2 is provided with pressure break passage 2-5, outer tube 2-2 and inner sleeve 2-3 are connected by shear pin 2-6, inner sleeve 2-3 is provided with inlet opening 2-7, and cradle 2-10 is threaded connection with inner sleeve 2-3.
The many cluster fracturing sliding bushs 3,4,6,7,9,10 of Type B are made up of top connection 3-1, outer tube 3-2, inner sleeve 3-3, piston 3-7, a 3-8 that builds the pressure, cradle 3-9 and lower contact 3-11, wherein pressure transmission passage 3-10 punches formation on outer tube 3-2, outer tube 3-2 is provided with pressure break passage 3-4, outer tube 3-2 and inner sleeve 3-3 are connected by shear pin 3-5, inner sleeve 3-3 is provided with inlet opening 3-6, and cradle 3-9 is threaded connection with inner sleeve 3-3.
Pressure reduction sliding sleeve 11 is made up of top connection 4-1, lower contact 4-6 and sliding sleeve 4-3, and wherein top connection is provided with pressure transmission passage 4-2 and pressure break passage 4-5, sliding sleeve 4-3 are fixed on top connection 4-1 by shear pin 4-4, and top connection 4-1 and lower contact 4-6 are threaded connection.
Special opening instrument is made up of glue umbrella 5-1, decylization 5-2 and 5-4, central block 5-6, and wherein decylization 5-2 is fixed on central block 5-6 by shear pin 5-3, and decylization 5-4 is fixed on central block 5-6 by shear pin 5-5.
Fracturing work is carried out using the fracturing string described in the present embodiment, following steps are specifically included：
（a）After the completion of casing cementing operation, suppress in well head, when pressure reaches setting value, shear pin 4-4 in pressure reduction sliding sleeve 11 cuts off, sliding sleeve 4-3 is descending, expose pressure transmission passage 4-2 and pressure break passage 4-5, pressure passes through pressure transmission passage 4-2, pressure transmission pipeline 14 and many cluster fracturing sliding bushs 10 of Type B, pressure transmission passage 3-10 in 9, and the pressure transmission passage 2-11 in many cluster fracturing sliding bushs 8 of A types is delivered to many cluster fracturing sliding bushs 10 of Type B, the inlet opening 2-7 of the 9 many cluster fracturing sliding bushs 8 of inlet opening 3-6 and A type, by many cluster fracturing sliding bushs 10 of Type B, piston 2-8 in many cluster fracturing sliding bushs 8 of piston 3-7 and A type in 9 promotes descending, the many cluster fracturing sliding bushs 10 of Type B, the 2-9 closure that build the pressure built the pressure in many cluster fracturing sliding bushs 8 of a 3-8 and A type in 9, start sand fracturing after the completion of said process, the corresponding stratum of pressure break passage 4-5 pressure breaks that fracturing fluid passes through pressure reduction sliding sleeve 11；
（b）After the completion of pressing crack construction, put into special opening instrument, well head turn on pump is pumped, after the 2-9 that builds the pressure in many cluster fracturing sliding bushs 8 of decylization 5-2 and A type in special opening instrument is compound, pressure is raised suddenly, well head continues to suppress, when pressure value is increased to setting value, shear pin 2-6 in many cluster fracturing sliding bushs 8 of A types cuts off, inner sleeve 2-3, piston 2-8, build the pressure a 2-9, cradle 2-10 is descending together, expose feed pathway 2-4 and pressure break passage 2-5, pressure passes through feed pathway 2-4, pressure transmission pipeline 14 and many cluster fracturing sliding bushs 7 of Type B, pressure transmission passage 3-10 in 6, and the pressure transmission passage 2-11 in many cluster fracturing sliding bushs 5 of A types is delivered to many cluster fracturing sliding bushs 7 of Type B, the inlet opening 2-7 of the 6 many cluster fracturing sliding bushs 5 of inlet opening 3-6 and A type, by many cluster fracturing sliding bushs 7 of Type B, piston 2-8 in many cluster fracturing sliding bushs 5 of piston 3-7 and A type in 6 promotes descending, the many cluster fracturing sliding bushs 7 of Type B, the 2-9 closure that build the pressure built the pressure in many cluster fracturing sliding bushs 5 of a 3-8 and A type in 6, well head continues to suppress, when pressure value is increased to setting value, shear pin 5-3 in special opening instrument cuts off, decylization 5-2 comes off from special opening instrument, special opening instrument is descending, after the 3-8 that builds the pressure during special opening instrument comes downwards to decylization 5-4 and many cluster fracturing sliding bushs 9 of Type B is compound, pressure is raised suddenly, well head continues to suppress, when pressure value is increased to setting value, shear pin 3-5 in many cluster fracturing sliding bushs 9 of Type B cuts off, inner sleeve 3-3, piston 3-7, build the pressure a 3-8, cradle 3-9 is descending together, expose pressure break passage 3-4, well head continues to suppress, when pressure value is increased to setting value, shear pin 5-5 in special opening instrument cuts off, decylization 5-4 comes off from special opening instrument, special opening instrument is descending, after the 3-8 that builds the pressure during special opening instrument comes downwards to central block 5-6 and many cluster fracturing sliding bushs 10 of Type B is compound, pressure is raised suddenly, well head continues to suppress, when pressure value is increased to setting value, shear pin 3-5 in many cluster fracturing sliding bushs 10 of Type B cuts off, inner sleeve 3-3, piston 3-7, build the pressure a 3-8, cradle 3-9 is descending together, expose pressure break passage 3-4, start sand fracturing after the completion of said process, fracturing fluid is by the pressure break passage 2-5 in many cluster fracturing sliding bushs 8 of A types, the corresponding stratum of pressure break passage 3-4 pressure breaks in pressure break passage 3-4 and many cluster fracturing sliding bushs 10 of Type B in many cluster fracturing sliding bushs 9 of Type B；
（c）Repeat step（b）, carry out the 2nd grade of pressure break unit pressure break；
（d）Continue repeat step（b）, carry out 3rd level pressure break unit pressure break.
It should be added that for the ease of the input of special opening instrument, from the first order（Bottom）To afterbody（Topmost）Build the pressure seat and cradle internal diameter in many cluster fracturing sliding bushs, and glue umbrella, the decylization external diameter of special opening instrument is using the trend for expanding step by step.
Claims (5)
1. a kind of many cluster infinite stages well-cementing staged-fracturing tubing strings, is characterized in that：The fracturing string forms float shoe, float collar, pressure reduction sliding sleeve and multistage fracturing unit by sleeve pipe connection from bottom to top, include one group of many cluster fracturing sliding bush of A types and many cluster fracturing sliding bushs of multigroup Type B in every grade of pressure break unit, many cluster fracturing sliding bush outsides pressure transmission pipeline is sequentially connected, and passes through the special opening instrument of input inside many cluster fracturing sliding bushs respectively and opens one by one.
2. many cluster infinite stages well-cementing staged-fracturing tubing strings according to claim 1, is characterized in that：The many cluster fracturing sliding bushs of A types are made up of top connection, outer tube, inner sleeve, piston, the seat that builds the pressure, cradle and lower contact, the stroke that axially punches wherein on outer tube constitutes feed pathway and pressure transmission passage, outer tube is provided with radial direction pressure break passage, outer tube and inner sleeve are connected by shear pin, inside put and be provided with radial direction inlet opening, cradle is threaded connection with inner sleeve；The many cluster fracturing sliding bushs of Type B are made up of top connection, outer tube, inner sleeve, piston, the seat that builds the pressure, cradle and lower contact, the punching wherein on outer tube constitutes continuous pressure transmission passage, outer tube is provided with radial direction pressure break passage, outer tube and inner sleeve are connected by shear pin, inside put and be provided with radial direction inlet opening, cradle is threaded connection with inner sleeve.
3. many cluster infinite stages well-cementing staged-fracturing tubing strings according to claim 2, is characterized in that：Pressure reduction sliding sleeve is made up of top connection, lower contact and sliding sleeve, and wherein top connection is provided with axial pressure transmission passage and radial direction pressure break passage, and sliding sleeve is fixed in top connection by shear pin, and top connection and lower contact are threaded connection.
4. many cluster infinite stages well-cementing staged-fracturing tubing strings according to claim 3, is characterized in that：Special opening instrument is made up of glue umbrella, decylization, central block, wherein decylization is fixed on central block by shear pin, it is identical with the number of many cluster fracturing sliding bushs of Type B included in every grade of pressure break unit per the only quantity of decylization needed for special opening instrument, need to be identical with the series of pressure break unit with the quantity of special opening instrument.
5., according to the fracturing process of many cluster infinite stages well-cementing staged-fracturing tubing strings described in Claims 1-4 any claim, it is characterized in that comprising the following steps：
（a）After the completion of casing cementing operation, the pressure reduction sliding sleeve of bottom, then sand fracturing are opened by way of well head is suppressed first；
（b）After the completion of pressure break, special opening instrument is put into, many cluster fracturing sliding bushs of A types and many cluster fracturing sliding bushs of multigroup Type B in the 1st grade of pressure break unit, sand fracturing are opened successively；
（c）Repeat step（b）, carry out the 2nd grade of pressure break unit pressure break;
（d）Continue repeat step（b）, until completing the fracturing work of whole pressure break units.
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| CN110005391A (en) * | 2019-04-19 | 2019-07-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of intelligent switch sliding sleeve of bushing layered fracturing technology pipe string and its process |
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| CN114482958A (en) * | 2020-10-26 | 2022-05-13 | 中国石油化工股份有限公司 | Casing cementing full-bore infinite staged fracturing well completion device and fracturing well completion method thereof |
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Application publication date: 20170510 |