CN204532234U - Sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column - Google Patents
Sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column Download PDFInfo
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- CN204532234U CN204532234U CN201520006462.4U CN201520006462U CN204532234U CN 204532234 U CN204532234 U CN 204532234U CN 201520006462 U CN201520006462 U CN 201520006462U CN 204532234 U CN204532234 U CN 204532234U
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Abstract
The utility model provides a kind of sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column, comprising: float shoe, float collar, Multi-stage sleeve sliding sleeve, Multi-stage sleeve pipe nipple and multiple waterpower bridging plug; Wherein, described Multi-stage sleeve sliding sleeve is connected successively by described Multi-stage sleeve pipe nipple, and the end of described completion tubular column connects described float collar by casing nipple, and the lower end of described float collar connects described float shoe; Described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug distinguish the corresponding oil reservoirs in corresponding horizontal well.The technical scheme that the utility model provides, not only work progress is simple, and gathered limited level well completion of casing sliding sleeve tubing string staged fracturing fast, reliable and the segmentation of waterpower bridging plug is reliable, can many showers hole, huge discharge volume fracturing advantage, meet water of oil-gas field horizontal well carry out on long horizontal sections safety, reliably, fracturing reform requirement fast.
Description
Technical field
The utility model relates to a kind of completion tubular column technology, particularly relates to a kind of sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column.
Background technology
At present, verified China's low-permeability oil deposit reserves 6,000,000,000 tons nearly, but because the permeability of low-permeability oil pool is low, filtrational resistance large, poor connectivity, wherein the hyposmosis reserves of about 50% are low due to production capacity, are difficult to exploit.And horizontal well can increase the contact area of pit shaft and oil reservoir, improve the output of oil gas and final recovery ratio, therefore, fractured horizontal well is proved to be the effective means developing Low permeable oil and gas reservoirs.But develop rapidly along with socioeconomic, the single well productivity of horizontal well is lower, can not meet the requirement of economic development, so, the research of staged fracturing of horizontal well technology is become to an important directions and the approach of exploitation Low permeable oil and gas reservoirs.
The existing technology that can realize staged fracturing of horizontal well of China mainly contains the types such as limited level sliding sleeve of bushing staged fracturing method, waterpower bridging plug staged fracturing method and open hole packer staged fracturing method, according to different ambient conditionss, suitable fracturing process is selected to carry out staged fracturing process to horizontal well, can be under certain conditions, realize the penetrating power increasing oil gas, improve oil and gas production.
But above-mentioned cased hole completion staged fracturing method is not be restricted in number of fragments, be exactly that work progress is complicated, all can not meet water of oil-gas field horizontal well carry out on long horizontal sections safety, reliably, fracturing reform requirement fast.
Utility model content
The utility model provides a kind of sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column, solve the number of fragments that existing cased hole completion staged fracturing method exists to be restricted or the problem of work progress complexity, can meet that water of oil-gas field horizontal well carries out on long horizontal sections safe, reliably, fracturing reform requirement fast.
A kind of sliding sleeve of bushing that the utility model provides and waterpower bridging plug combined type completion tubular column, comprising: float shoe, float collar, Multi-stage sleeve sliding sleeve, Multi-stage sleeve pipe nipple and multiple waterpower bridging plug;
Described Multi-stage sleeve sliding sleeve is connected successively by described Multi-stage sleeve pipe nipple, and the end of described completion tubular column connects described float collar by described casing nipple, and the lower end of described float collar connects described float shoe;
Described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug distinguish the corresponding oil reservoirs in corresponding horizontal well.
In an embodiment of the present utility model, described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug distinguish the corresponding oil reservoirs in corresponding horizontal well, specifically comprise: the thicker oil reservoirs in the corresponding described horizontal well of described Multi-stage sleeve sliding sleeve; Thinner oil reservoirs in the corresponding described horizontal well of described multiple waterpower bridging plug.
In above-described embodiment of the present utility model, in described Multi-stage sleeve sliding sleeve, the top of every one-level sliding sleeve of bushing is provided with internal thread, in described Multi-stage sleeve sliding sleeve, the end of every one-level sliding sleeve of bushing is provided with external screw thread, in described Multi-stage sleeve sliding sleeve every one-level sliding sleeve of bushing middle part barrel on all offer radial slotted eye, be provided with shear pin above described radial slotted eye;
Every one-level sliding sleeve of bushing in described Multi-stage sleeve sliding sleeve, also comprise core cylinder, described core cylinder to be connected in described Multi-stage sleeve sliding sleeve in every one-level sliding sleeve of bushing by described shear pin, the two ends of described core cylinder joint face are provided with sealing ring, and the interior latus rectum of every grade of core cylinder is all greater than the interior latus rectum of its upper level core cylinder.
In above-described embodiment of the present utility model, described Multi-stage sleeve sliding sleeve comprises N level sliding sleeve of bushing, and described Multi-stage sleeve pipe nipple comprises N level casing nipple, and N is positive integer;
Described Multi-stage sleeve sliding sleeve is connected successively by described Multi-stage sleeve pipe nipple, specifically comprises:
N level sliding sleeve of bushing is connected by N-1 level casing nipple with N-1 level sliding sleeve of bushing, and the internal thread on described N level sliding sleeve of bushing top connects described N-1 level casing nipple, and the external screw thread of described N level sliding sleeve of bushing end connects N level casing nipple.
In another embodiment of the present utility model, described multiple waterpower bridging plug comprises: bridging plug body, ball sealer and be arranged in the central tube of described bridging plug body;
Described ball sealer is arranged in described bridging plug body, and described ball sealer is used for the described central tube of bridging plug body described in shutoff.
In above-described embodiment of the present utility model, described bridging plug body, comprising: top connection, cone cap, lock ring cover, screw, seat ring, slips, support set, glue tube base, short rubber cylinder, long packing element type, pin, lower contact and bolt;
There is internal thread the lower end of described top connection, and there is external screw thread the upper end of described lower contact, is connected the upper end of described central tube by the internal thread of described top connection lower end, and the lower end of described central tube connects described lower contact by the external screw thread of described lower contact upper end; Described cone cap is arranged on described central tube, and described ball sealer is stuck on the described central tube between described cone cap and described lock ring cover;
Described long packing element type is circumferential, and described long packing element type is enclosed within the middle part of described central tube outer wall; Overlap from bottom to top on the top of described long packing element type and at the outer wall of described central tube and have described short rubber cylinder, described glue tube base, described support set, described slips and described seat ring, the upper surface of described seat ring contacts with the lower surface of described top connection, described support set is provided with radial hole, and described screw is fixed on described central tube through described radial hole;
Described lower contact is symmetrically fixed with described bolt, and described bolt is for being fixed on described bridging plug body by described lower contact.
In above-described embodiment of the present utility model, described multiple waterpower bridging plug is solvable bridging plug.
In above-described embodiment of the present utility model, described ball sealer is solubilized ball.
In above-described embodiment of the present utility model, described glue tube base, described short rubber cylinder, described long packing element type and described pin adopt nitrile rubber material to make, and described slips adopts ductile cast iron material to make.
The sliding sleeve of bushing that the utility model provides and waterpower bridging plug combined type completion tubular column, not only work progress is simple, and it is quick to have gathered limited level well completion of casing sliding sleeve tubing string staged fracturing, reliable and the segmentation of waterpower bridging plug is reliable, can many showers hole, the advantage of huge discharge volume fracturing, not only reduce the use number of waterpower bridging plug, what need in fracturing process waits between the stopping time and the follow-up flow chart boring mill bridging plug, but also overcome the use bottleneck of the long horizontal sections segmentation deficiency existed with limited level sliding sleeve of bushing merely, the safety that water of oil-gas field horizontal well carries out on long horizontal sections can be met, reliably, fracturing reform requirement fast.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the sliding sleeve of bushing that Fig. 1 provides for the utility model embodiment and waterpower bridging plug combined type completion tubular column;
The structural profile schematic diagram that Fig. 2 is the sliding sleeve of bushing shown in Fig. 1;
Fig. 3 is the structural profile schematic diagram of the waterpower bridging plug shown in Fig. 1;
The schematic flow sheet of the quick fracturing process that Fig. 4 provides for the utility model embodiment.
Description of reference numerals:
1: float shoe; 5102: cone cap;
2: float collar; 5103: lock ring cover;
3: sliding sleeve of bushing; 5104: screw;
4: casing nipple; 5105: seat ring;
5: waterpower bridging plug; 5106: slips;
31: shear pin; 5107: support set;
32: core cylinder; 5108: glue tube base;
33: sealing ring; 5109: short rubber cylinder;
51: bridging plug body; 5110: long packing element type;
52: ball sealer; 5111: pin;
53: central tube; 5112: lower contact;
5101: top connection; 5113: bolt.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Along with the prolongation of petroleum exploration and development time, the conventional oil field such as middle and high infiltration gradually reduce, and the unconventional oil field such as hyposmosis constantly increases, and becomes more and more important to the research of Low permeable oil and gas reservoirs production technique.But, belong to fine and close shale oil gas reservoir due to Low permeable oil and gas reservoirs, the explored low-permeability oil deposit of China cannot be exploited.
In view of horizontal well can increase the exposed surface of oil-gas Layer, increase the contact area of pit shaft and oil reservoir, improve the output of oil gas and final recovery ratio, make horizontal well become the basis of oil-gas reservoir exploitation.But because the permeability of low-permeability oil pool is low, filtrational resistance large, poor connectivity, the single well productivity of horizontal well is also lower sometimes, can not meet the requirement of economic development.And pressure break refers to and utilizes hydraulic action (inject fracturing fluid and form high pressure in Oil/gas Well), oil-gas Layer is made to form a kind of method in crack, fracturing process can increase the percolation ability of oil gas, improves oil and gas production, so, when exploiting low-permeability oil deposit, not only exploit in horizontal well, also adopt fracturing technique simultaneously, the object of oil field increasing the storage stable yields can be realized, especially to the fine and close shale oil gas reservoir of exploitation, be the key technology realizing the exploitation of its economical and effective.
So-called staged fracturing technology, it is exactly the direction along horizontal hole in pit shaft, according to reservoir characteristics and reservoir characteristic, on reservoir properties preferably several or more horizontal segment, certain technical measures are adopted strictly to control the quantity of preforation tunnel, aperture and perforation phase place, pressed off the technology of several or more horizontal segment oil reservoir by pressing crack construction simultaneously, this is the key technology of a set of effective transformation Low permeable oil and gas reservoirs, therefore, it is imperative to the research of staged fracturing of horizontal well method and technology to strengthen, especially staged fracturing of horizontal well completion optimal design.
The types such as the existing waterpower bridging plug staged fracturing method to staged fracturing of horizontal well, limited level sliding sleeve of bushing staged fracturing method and open hole packer staged fracturing method, when pressure break is carried out to horizontal well in segments, or be restricted in number of fragments, or work progress is complicated, its all can not meet water of oil-gas field horizontal well long horizontal sections safety, reliably, fracturing reform requirement fast.Therefore, for above-mentioned technical problem, the utility model proposes a kind of sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column and fracturing process fast, existing cased hole completion staged fracturing method can be solved be restricted in number of fragments or the problem of work progress complexity, meet water of oil-gas field horizontal well carry out on long horizontal sections safety, reliably, fracturing reform requirement fast.
The structural representation of the sliding sleeve of bushing that Fig. 1 provides for the utility model embodiment and waterpower bridging plug combined type completion tubular column.As shown in Figure 1, a kind of sliding sleeve of bushing that the utility model provides and waterpower bridging plug combined type completion tubular column, comprising: float shoe 1, float collar 2, Multi-stage sleeve sliding sleeve 3, Multi-stage sleeve pipe nipple 4 and multiple waterpower bridging plug 5.
Wherein, Multi-stage sleeve sliding sleeve 3 is connected successively by Multi-stage sleeve pipe nipple 4, and sliding sleeve of bushing is connected float collar 2 with the end of waterpower bridging plug combined type completion tubular column by casing nipple 4, and the lower end of float collar 2 connects float shoe 1; Multi-stage sleeve sliding sleeve 3 and multiple waterpower bridging plug 5 distinguish the corresponding oil reservoirs in corresponding horizontal well.
Concrete, the present embodiment middle sleeve sliding sleeve and waterpower bridging plug combined type completion tubular column are lowered in horizontal well, every one-level sliding sleeve of bushing 3 is connected by casing nipple 4, the end of this completion tubular column utilizes casing nipple 4 to connect float collar 2 and float shoe 1, float collar 2 and float shoe 1 support the use, be used for guiding completion tubular column along the smooth G.I.H in direction of horizontal well pit shaft, the resistance produced when entering horizontal well under can reducing completion tubular column.According to actual needs, Multi-stage sleeve sliding sleeve 3 and multiple waterpower bridging plug 5 are lowered into respectively the position of the corresponding oil reservoirs in horizontal well.
The sliding sleeve of bushing that the utility model embodiment provides and waterpower bridging plug combined type completion tubular column, not only work progress is simple, and it is quick to have gathered limited level well completion of casing sliding sleeve tubing string staged fracturing, reliable and the segmentation of waterpower bridging plug is reliable, can many showers hole, the advantage of huge discharge volume fracturing, not only reduce the use number of waterpower bridging plug, what need in fracturing process waits between the stopping time and the follow-up flow chart boring mill bridging plug, but also overcome the use bottleneck of the long horizontal sections segmentation deficiency existed with limited level sliding sleeve of bushing merely, meet water of oil-gas field horizontal well and carry out safety on long horizontal sections, reliably, fracturing reform requirement fast.
What deserves to be explained is, the Multi-stage sleeve sliding sleeve 3 in above-described embodiment and multiple waterpower bridging plug 5 distinguish the corresponding oil reservoirs in corresponding horizontal well, specifically comprise: the thicker oil reservoirs in the corresponding horizontal well of Multi-stage sleeve sliding sleeve 3; Thinner oil reservoirs in the corresponding described horizontal well of multiple waterpower bridging plug 5.
Thicker oil reservoirs place in horizontal well, use simple mode just can realize the pressure break of corresponding oil reservoirs, adopt well completion of casing sliding sleeve tubing string staged fracturing under the prerequisite of satisfying the demand, quick, the reliable advantage of well completion of casing sliding sleeve tubing string staged fracturing method can be played; And for the thinner oil reservoirs in horizontal well, many showers hole must be adopted, demand that huge discharge volume fracturing could meet pressure break.Therefore, the sliding sleeve of bushing that the utility model proposes and waterpower bridging plug combined type completion tubular column, number and the position of sliding sleeve of bushing and waterpower bridging plug can be set according to actual needs, realize the pressure break to the oil storage interval in horizontal well, it not only combines the advantage of two kinds of fracturing process, and the structure formed is simple, operates more convenient, drastically increase hop count and the efficiency of construction of staged fracturing, decrease oil-gas field development expense.
The structural profile schematic diagram that Fig. 2 is the sliding sleeve of bushing shown in Fig. 1.As shown in Figure 2, in Multi-stage sleeve sliding sleeve, the top of every one-level sliding sleeve of bushing 3 is all provided with internal thread, in Multi-stage sleeve sliding sleeve, the end of every one-level sliding sleeve of bushing 3 is provided with external screw thread, in Multi-stage sleeve sliding sleeve every one-level sliding sleeve of bushing 3 middle part barrel on all offer radial slotted eye, be provided with shear pin 31 above described radial slotted eye;
Every one-level sliding sleeve of bushing 3 in Multi-stage sleeve sliding sleeve, also comprise core cylinder 32, core cylinder 32 is connected in Multi-stage sleeve sliding sleeve in every one-level sliding sleeve of bushing 3 by shear pin 31, and the two ends of core cylinder 32 joint face are provided with sealing ring 33, and the interior latus rectum of every grade of core cylinder 32 is all greater than the interior latus rectum of its upper level core cylinder 32.
In the present embodiment, by being provided with internal thread on the top of every one-level sliding sleeve of bushing 3, being provided with external screw thread at the end of every one-level sliding sleeve of bushing 3, Multi-stage sleeve sliding sleeve can be made to be connected in turn; The middle part barrel of every one-level sliding sleeve of bushing 3 offers radial slotted eye, and shear pin 31 inserts the inside of described radial slotted eye, makes the core cylinder 32 of every one-level sliding sleeve of bushing 3 be fixed in this grade of sliding sleeve of bushing 3; By arranging sealing ring 33 at the two ends of core cylinder 32 joint face, and the interior latus rectum of every grade of core cylinder 32 is all greater than the interior latus rectum of its upper level core cylinder 32, when previous stage sliding sleeve of bushing carries out pressure break to horizontal segment, can ensure that the sliding sleeve of bushing be arranged on thereafter in completion tubular column is unaffected.
The sliding sleeve of bushing that the utility model provides and waterpower bridging plug combined type completion tubular column, by arranging the concrete structure of every one-level sliding sleeve of bushing in Multi-stage sleeve sliding sleeve, can realize quick, the reliable advantage of limited level well completion of casing sliding sleeve tubing string staged fracturing.
Further, in the above-described embodiments, described Multi-stage sleeve sliding sleeve can comprise N level sliding sleeve of bushing, and described Multi-stage sleeve pipe nipple can comprise N level casing nipple 4, and wherein N is positive integer.
Multi-stage sleeve sliding sleeve 3 is connected successively by Multi-stage sleeve pipe nipple 4, specifically comprises:
N level sliding sleeve of bushing 3 is connected by N-1 level casing nipple 4 with N-1 level sliding sleeve of bushing 3, and the external screw thread that the internal thread on N level sliding sleeve of bushing 3 top connects N-1 level casing nipple 4, the N level sliding sleeve of bushing 3 end connects N level casing nipple 4.Because the top of every grade of sliding sleeve of bushing offers internal thread, the end of every grade of sliding sleeve of bushing offers external screw thread, and centre utilizes casing nipple just adjacent two-stage sliding sleeve of bushing can be coupled together.
Fig. 3 is the structural profile schematic diagram of the waterpower bridging plug shown in Fig. 1.As shown in Figure 3, each waterpower bridging plug 5 in multiple waterpower bridging plug comprises: bridging plug body 51, ball sealer 52 and be arranged in the central tube 53 of bridging plug body 51.Wherein, ball sealer 52 is arranged in bridging plug body 51, and ball sealer 52 is for the central tube 53 in blocked bridge plug body 51.
Concrete, bridging plug body 51 comprises: top connection 5101, cone cap 5102, lock ring cover 5103, screw 5104, seat ring 5105, slips 5106, support set 5107, glue tube base 5108, short rubber cylinder 5109, long packing element type 5110, pin 5111, lower contact 5112 and bolt 5113.
Wherein, there is internal thread the lower end of top connection 5101, there is external screw thread the upper end of lower contact 5112, the upper end of central tube 53 is connected by the internal thread of the lower end of top connection 5101, the lower end of central tube 53 connects lower contact 5112 by the external screw thread of lower contact 5112 upper end, cone cap 5102 is arranged on central tube 53, and ball sealer 52 is stuck on the central tube 53 between cone cap 5102 and lock ring cover 5103.
Concrete, long packing element type 5110 is circumferential, and long packing element type 5110 is enclosed within the middle part of central tube 53 outer wall; Overlap from bottom to top on the top of long packing element type 5110 and at the outer wall of central tube 53 and have short rubber cylinder 5109, glue tube base 5108, support set 5107, slips 5106 and seat ring 5105, the upper surface of seat ring 5105 contacts with the lower surface of top connection 5101, support set 5107 is provided with radial hole, and screw 5104 is fixed on central tube 53 through described radial hole.
Lower contact 5112 is symmetrically fixed with bolt 5113, bolt 5113 is for being fixed on bridging plug body 51 by lower contact 5112.
Adopt the waterpower bridging plug 5 of said structure, its operating principle is: the upper end of the top connection 5101 on bridging plug body 51 is connected with special setting instrument by screw thread, and under enter in horizontal well, hydraulic pump is sent to the position that horizontal well oil gas fracturing reform needs shutoff; When the bridging plug body 51 of waterpower bridging plug 5 being set on sleeve pipe by means of special setting instrument, the seat ring 5105 of waterpower bridging plug is pushed away downwards by setting instrument urceolus, seat ring 5105 moves down, slips 5106 moves down along support set 5107 and struts, support set 5107 moves down simultaneously, and then promotion glue tube base 5108 compresses short rubber cylinder 5109 and long packing element type 5110, makes short rubber cylinder 5109 and long packing element type 5110 expand, reaches the object in shutoff sliding sleeve of bushing space.Now, slips 5106 is outwards supportted by support set 5107 cone further, and slips 5106 is stuck on internal surface of sleeve pipe, and meanwhile, the effect of central tube 53 under tension, makes its thin-walled place at central tube 53 disconnect, complete the setting of waterpower bridging plug 5.Simultaneously, utilize perforation tool perforation on sleeve pipe, by in ball sealer 52 Input Level well, in the sliding sleeve of bushing that provides of the utility model and waterpower bridging plug combined type completion tubular column, ball sealer 52 can drop in the central tube 53 of bridging plug body 51, thus realizes the function of sealing before pressing crack construction.
Waterpower bridging plug in the present embodiment, by adopting the central tube in ball sealer blocked bridge plug body, can realize the effect of fluid partitioning in staged fracturing process.
Optionally, in above-described embodiment of the present utility model, described multiple waterpower bridging plug 5 is dissolvable bridge plug, and described ball sealer 52 is solubilized ball.
In detail, the glue tube base 5108 of waterpower bridging plug 5, short rubber cylinder 5109, long packing element type 5110 and pin 5111 adopt nitrile rubber material to make, slips 5106 adopts ductile cast iron material to make, remaining part also all adopt soluble material time, in the water of this waterpower bridging plug below 60 degrees Celsius, just molten in 16 hours, can dissolve completely in 48 hours.Optionally, in the sliding sleeve of bushing provided at the present embodiment and waterpower bridging plug combined type completion tubular column, can select according to actual conditions the material making waterpower bridging plug 5 and ball sealer 52.
Due to the effect that waterpower bridging plug 5 has been temporary transient shutoff in the process of pressing crack construction, after pressure break, main parts automatic dissolving, do not need to carry out the operation of brill mill to waterpower bridging plug, when utilizing the waterpower bridging plug in the present embodiment to carry out staged fracturing, not only eliminate and bore time consuming, to also reduce etc. between the stopping time, make when the sliding sleeve of bushing utilizing the utility model to provide and waterpower bridging plug combined type completion tubular column carry out staged fracturing, reduce the construction period of separate stratum fracfturing, greatly improve efficiency of construction, simultaneously, reduce the equipment that construction needs, decrease oil-gas field development expense.
The schematic flow sheet of the quick fracturing process that Fig. 4 provides for the utility model embodiment.The quick fracturing process of the one that the utility model provides, the sliding sleeve of bushing in Fig. 1 to Fig. 3 and waterpower bridging plug combined type completion tubular column is adopted to carry out pressure break to horizontal well, the annexation of concrete parts, see the detailed description in the corresponding embodiment in Fig. 1 ~ 3, repeats no more herein.
As shown in Figure 4, described quick fracturing process comprises:
S100: be lowered in horizontal well by described sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column, makes the Multi-stage sleeve sliding sleeve in described sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column and the corresponding oil reservoirs in the corresponding horizontal well of multiple waterpower bridging plug difference;
S101: after described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug aim at corresponding oil reservoirs, pressure break is carried out to described oil reservoirs.
The quick fracturing process that the utility model embodiment provides, sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column is adopted to carry out pressure break to horizontal well, not only work progress is simple, and it is quick to have gathered limited level well completion of casing sliding sleeve tubing string staged fracturing, reliable and the segmentation of waterpower bridging plug is reliable, can many showers hole, the advantage of huge discharge volume fracturing, not only reduce the use number of waterpower bridging plug, what need in fracturing process waits between the stopping time and the follow-up flow chart boring mill bridging plug, but also overcome the use bottleneck of the long horizontal sections segmentation deficiency existed with limited level sliding sleeve of bushing merely, meet water of oil-gas field horizontal well and carry out safety on long horizontal sections, reliably, fracturing reform requirement fast.
Further, described in make Multi-stage sleeve sliding sleeve in described sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column and the multiple waterpower bridging plug corresponding oil reservoirs respectively in corresponding horizontal well, comprising:
Adopt the mode of magnetic orientation by the thicker oil reservoirs in corresponding for described Multi-stage sleeve sliding sleeve described horizontal well, by the thinner oil reservoirs in corresponding for described multiple waterpower bridging plug described horizontal well.
Adopt the mode of magnetic orientation respectively by the corresponding oil reservoirs in Multi-stage sleeve sliding sleeve and the corresponding horizontal well of multiple composite bridge plug, be specially: when sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column are lowered in horizontal well, the position of Multi-stage sleeve sliding sleeve and multiple composite bridge plug is adjusted by magnetic orientation, Multi-stage sleeve sliding sleeve and multiple composite bridge plug is made to aim at corresponding interval to be rebuilt, such as, thicker oil reservoirs in the corresponding horizontal well of Multi-stage sleeve sliding sleeve, the thinner oil reservoirs in the corresponding horizontal well of multiple composite bridge plug.
The utility model embodiment adopts the mode of magnetic orientation that Multi-stage sleeve sliding sleeve and multiple composite bridge plug can be made to navigate to corresponding oil reservoirs more accurately, and, when the sliding sleeve of bushing utilizing the utility model to provide and waterpower bridging plug combined type completion tubular column carry out pressure break to horizontal well, the advantage of sliding sleeve of bushing and waterpower bridging plug fracturing process can be given full play to, drastically increase oil gas field efficiency of construction, decrease oil-gas field development expense, conventional and unconventional hyposmosis and extra-low permeability oil reservoirs exploitation is become more economically and efficiently.
In the above-described embodiments, it is described after described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug aim at corresponding oil reservoirs, pressure break is carried out to described oil reservoirs, comprise: after described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug aim at corresponding oil reservoirs, adopt the well cementation of Special fixing well tool, entrance aperture instrument under employing cable, aims at and treats that the oil reservoirs of pressure break carry out perforation; Drop into the ball sealer varied in size successively, described in the ball sealer that varies in size for opening described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug; Oil reservoirs described in pressure break.
Concrete, utilize the mode of magnetic orientation that Multi-stage sleeve sliding sleeve is aimed at the thicker oil reservoirs in horizontal well, after multiple composite bridge plug aims at the thinner oil reservoirs in horizontal well, first, special cementing plug is adopted to cement the well, by means of cable, perforating gun is lowered in fixing horizontal well, aim at and treat that the oil reservoirs of pressure break carry out perforating application, then in completion tubular column, drop into the corresponding sliding sleeve of bushing of oil reservoirs to be rebuilt or solubilized ball corresponding to waterpower bridging plug, and then adopt the mode of hydraulic pressure to open corresponding sliding sleeve of bushing or waterpower bridging plug, finally carry out pressure break at described sliding sleeve of bushing or oil reservoirs position place corresponding to waterpower bridging plug, realize the object of the corresponding oil reservoirs of transformation.After described oil reservoirs fracturing reform to be rebuilt completes, continue to drop into next stage sliding sleeve of bushing or solubilized ball corresponding to waterpower bridging plug, carry out the fracturing reform of sliding sleeve of bushing or waterpower bridging plug piecemeal, until the oil-gas reservoir fracturing reform of all intervals of horizontal well completes.
Well cementation described above, refer in order to Reinforcing Shaft, ensure the safety drilling of transformation oil gas field, need first packing oil reservoirs and water layer, a key link of testing with the sealing ensured between the exploratory period and realizing rational production of hydrocarbons in whole recovery process and design.
The quick fracturing process that the utility model provides, according to the feature of reservoir characteristics and oil reservoirs, sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column is adopted horizontal well to be carried out to the method for pressure break, not only work progress is simple, and it is quick to have gathered limited level well completion of casing sliding sleeve tubing string staged fracturing, reliable and the segmentation of waterpower bridging plug is reliable, can many showers hole, the advantage of huge discharge volume fracturing, not only reduce the use number of waterpower bridging plug, what need in fracturing process waits between the stopping time and the follow-up flow chart boring mill bridging plug, but also overcome the use bottleneck of the long horizontal sections segmentation deficiency existed with limited level sliding sleeve of bushing merely, improve horizontal well capacity, more efficiently add staged fracturing of horizontal well to low permeability formation production capacity, achieve the steady amount volume increase of oil gas field, meet water of oil-gas field horizontal well and carry out safety on long horizontal sections, reliably, fracturing reform requirement fast.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (9)
1. sliding sleeve of bushing and a waterpower bridging plug combined type completion tubular column, is characterized in that, comprising: float shoe, float collar, Multi-stage sleeve sliding sleeve, Multi-stage sleeve pipe nipple and multiple waterpower bridging plug;
Described Multi-stage sleeve sliding sleeve is connected successively by described Multi-stage sleeve pipe nipple, and the end of described completion tubular column connects described float collar by described casing nipple, and the lower end of described float collar connects described float shoe;
Described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug distinguish the corresponding oil reservoirs in corresponding horizontal well.
2. sliding sleeve of bushing according to claim 1 and waterpower bridging plug combined type completion tubular column, it is characterized in that, described Multi-stage sleeve sliding sleeve and described multiple waterpower bridging plug distinguish the corresponding oil reservoirs in corresponding horizontal well, specifically comprise: the thicker oil reservoirs in the corresponding described horizontal well of described Multi-stage sleeve sliding sleeve; Thinner oil reservoirs in the corresponding described horizontal well of described multiple waterpower bridging plug.
3. sliding sleeve of bushing according to claim 2 and waterpower bridging plug combined type completion tubular column, it is characterized in that, in described Multi-stage sleeve sliding sleeve, the top of every one-level sliding sleeve of bushing is provided with internal thread, in described Multi-stage sleeve sliding sleeve, the end of every one-level sliding sleeve of bushing is provided with external screw thread, in described Multi-stage sleeve sliding sleeve every one-level sliding sleeve of bushing middle part barrel on offer radial slotted eye, be provided with shear pin above described radial slotted eye;
Every one-level sliding sleeve of bushing in described Multi-stage sleeve sliding sleeve, also comprise core cylinder, described core cylinder to be connected in described Multi-stage sleeve sliding sleeve in every one-level sliding sleeve of bushing by described shear pin, the two ends of described core cylinder joint face are provided with sealing ring, and the interior latus rectum of every grade of core cylinder is all greater than the interior latus rectum of its upper level core cylinder.
4. sliding sleeve of bushing according to claim 3 and waterpower bridging plug combined type completion tubular column, it is characterized in that, described Multi-stage sleeve sliding sleeve comprises N level sliding sleeve of bushing, and described Multi-stage sleeve pipe nipple comprises N level casing nipple, and N is positive integer;
Described Multi-stage sleeve sliding sleeve is connected successively by described Multi-stage sleeve pipe nipple, specifically comprises:
N level sliding sleeve of bushing is connected by N-1 level casing nipple with N-1 level sliding sleeve of bushing, and the internal thread on described N level sliding sleeve of bushing top connects described N-1 level casing nipple, and the external screw thread of described N level sliding sleeve of bushing end connects N level casing nipple.
5. sliding sleeve of bushing according to claim 2 and waterpower bridging plug combined type completion tubular column, is characterized in that, each waterpower bridging plug in described multiple waterpower bridging plug comprises: bridging plug body, ball sealer and be arranged in the central tube of described bridging plug body;
Described ball sealer is arranged in described bridging plug body, and described ball sealer is used for the described central tube in bridging plug body described in shutoff.
6. sliding sleeve of bushing according to claim 5 and waterpower bridging plug combined type completion tubular column, it is characterized in that, described bridging plug body, comprising: top connection, cone cap, lock ring cover, screw, seat ring, slips, support set, glue tube base, short rubber cylinder, long packing element type, pin, lower contact and bolt;
There is internal thread the lower end of described top connection, and there is external screw thread the upper end of described lower contact, is connected the upper end of described central tube by the internal thread of described top connection lower end, and the lower end of described central tube connects described lower contact by the external screw thread of described lower contact upper end; Described cone cap is arranged on described central tube, and described ball sealer is stuck on the described central tube between described cone cap and described lock ring cover;
Described long packing element type is circumferential, and described long packing element type is enclosed within the middle part of described central tube outer wall; Overlap from bottom to top on the top of described long packing element type and at the outer wall of described central tube and have described short rubber cylinder, described glue tube base, described support set, described slips and described seat ring, the upper surface of described seat ring contacts with the lower surface of described top connection, described support set is provided with radial hole, and described screw is fixed on described central tube through described radial hole;
Described lower contact is symmetrically fixed with described bolt, and described bolt is for being fixed on described bridging plug body by described lower contact.
7. sliding sleeve of bushing according to claim 6 and waterpower bridging plug combined type completion tubular column, is characterized in that, described multiple waterpower bridging plug is solvable bridging plug.
8. sliding sleeve of bushing according to claim 7 and waterpower bridging plug combined type completion tubular column, it is characterized in that, described ball sealer is solubilized ball.
9. sliding sleeve of bushing according to claim 8 and waterpower bridging plug combined type completion tubular column, it is characterized in that, described glue tube base, described short rubber cylinder, described long packing element type and described pin adopt nitrile rubber material to make, and described slips adopts ductile cast iron material to make.
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| CN201520006462.4U CN204532234U (en) | 2015-01-06 | 2015-01-06 | Sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column |
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| CN201520006462.4U CN204532234U (en) | 2015-01-06 | 2015-01-06 | Sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column |
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| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Bushing sliding sleeve and hydraulic bridge plug combined type completion pipe string and rapid fracturing method |
| CN105937383A (en) * | 2016-06-20 | 2016-09-14 | 中国石油天然气股份有限公司 | Soluble full-bore ball seat working barrel |
| CN107191157A (en) * | 2017-07-06 | 2017-09-22 | 中国石油集团渤海钻探工程有限公司 | A kind of solvable packing completion method of full-bore |
| CN107939336A (en) * | 2017-11-29 | 2018-04-20 | 中国石油集团渤海钻探工程有限公司 | The solvable seal pack rubber plug of full-bore and completion method |
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| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Bushing sliding sleeve and hydraulic bridge plug combined type completion pipe string and rapid fracturing method |
| CN105937383A (en) * | 2016-06-20 | 2016-09-14 | 中国石油天然气股份有限公司 | Soluble full-bore ball seat working barrel |
| CN105937383B (en) * | 2016-06-20 | 2018-09-04 | 中国石油天然气股份有限公司 | A kind of soluble type full-bore ball seat seating nipple |
| CN107191157A (en) * | 2017-07-06 | 2017-09-22 | 中国石油集团渤海钻探工程有限公司 | A kind of solvable packing completion method of full-bore |
| CN107939336A (en) * | 2017-11-29 | 2018-04-20 | 中国石油集团渤海钻探工程有限公司 | The solvable seal pack rubber plug of full-bore and completion method |
| RU2734193C1 (en) * | 2020-03-10 | 2020-10-13 | Акционерное общество "Самаранефтегаз" | Shear pressure valve |
| RU2739175C1 (en) * | 2020-06-29 | 2020-12-21 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Downhole mechanical packer |
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