CN109723377B - Open hole well completion reservoir integrated transformation method for window-opening side drilling - Google Patents
Open hole well completion reservoir integrated transformation method for window-opening side drilling Download PDFInfo
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Abstract
The invention belongs to the technical field of transformation of a drilling and completion reservoir, discloses an integrated transformation method of an open hole well completion reservoir of a windowing sidetracking well, and provides an integrated technical method of windowing sidetracking well, perforation and fracturing, wherein a drilling rod for drilling is combined with a hydraulic spray gun to realize integrated operation of perforation and fracturing of the drilling well; the method simplifies the existing conventional reservoir drilling and fracturing process, integrates drilling, perforating and fracturing into an integrated technology, uses a drill rod as a drilling, perforating and fracturing integrated tubular column, does not need to prepare a fracturing oil pipe on site, can implement perforating and fracturing operation after open hole completion, does not need to trip out and run down the tubular column, obviously shortens the construction period, and has simple construction process and high construction efficiency; the risk of the wall of a well collapsing and the construction difficulty are reduced, and the underground safety coefficient is obviously improved.
Description
Technical Field
The invention belongs to the technical field of transformation of a drilling and completion reservoir, and particularly relates to an integrated transformation method of a windowing sidetracking drilling open hole well completion reservoir.
Background
Conventional drilling and fracturing processes are generally carried out in two steps. With the increasing of low-efficiency wells and engineering abandoned wells, in order to excavate oil reservoir potential and improve oil field development benefit, in order to fully utilize the original shaft, more and more windows are opened and sidetracked, and the sidetracked well usually adopts an open hole completion process. Conventional reservoir transformation needs to take out a drilling pipe column after drilling is completed, then well preparation works such as drifting and pipe scraping, spiral centralizer well hole repairing and simulation fracturing pipe column drifting are carried out, then a fracturing pipe column is put in to carry out perforation fracturing operation, construction is complex, and efficiency is low.
Disclosure of Invention
The invention discloses a drilling, perforating and fracturing integrated reservoir transformation method aiming at open hole completion of window side drilling, which simplifies the existing conventional reservoir fracturing process, is a drilling, perforating and fracturing integrated technology, and has the advantages of concise construction process and high construction efficiency; the drill rod is used as the drilling perforation and fracturing integrated tubular column, a fracturing oil pipe does not need to be prepared on site, perforation and fracturing operation can be implemented after open hole well completion, multiple trip of the tubular column is not needed, the construction period is obviously shortened, the risk of well wall collapse and the construction difficulty are reduced, and the underground safety coefficient is obviously improved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a windowing sidetrack drilling open hole well completion reservoir integrated transformation method is characterized by comprising the following steps: comprises the following steps:
(1) according to the completion drilling depth of open hole well completion and the drilling footage of the drill bit, when one drill bit is predicted to be capable of drilling to a target layer, the combined drilling perforation and fracturing integrated pipe column is pulled out and the pipe column is put into the well;
(2) the drilling is carried out, the drilling is continued to the bottom until the drilling completion well depth is reached, and the well bore is cleaned circularly;
(3) connecting a pipe manifold of a ground well drilling wellhead device into a fracturing manifold, carrying out pressure test on the whole of the well drilling manifold and the fracturing manifold for 30min, and ensuring that the pressure test is qualified without puncture and leakage;
(4) replacing the slurry for drilling in the shaft with active water, washing the well until the water color of the inlet and the outlet is consistent, wherein the using amount of the active water is not less than 1.5 times of the volume of the shaft;
(5) lifting the drilling, perforating and fracturing integrated pipe column in the step (1) to a preset position, throwing balls in the integrated pipe column, pumping perforating fluid to deliver the balls, delivering the balls to a spray gun ball seat, opening a spray gun sliding sleeve by impacting and pressing, and establishing a hydraulic jet channel;
(6) pumping quartz sand mixed liquid after the hydraulic jet channel is established in the step (5) to realize sand blasting and perforation, and reducing jet discharge to 1.0-1.6 m after perforation is finished3The casing gate of the spray gun sliding sleeve is quickly closed, after the stratum is fractured, the annular space starts to pump fluid, the annular space pressure is kept lower than the fracture extension pressure, then the main fracturing construction procedure is carried out, the jet displacement is increased to the designed fracturing displacement, and then the pad fluid, the sand carrying fluid and the displacing fluid are sequentially pumped for fracturing;
(7) and (3) lifting the drilling perforation and fracturing integrated pipe column in the step (1) to the previous fracturing position, repeating the step (6), and circulating in such a way until fracturing of the whole well section is finished to finish integrated transformation of the open hole well completion reservoir of the open window side drilling.
Preferably, the formula of the active water in the step (4) is as follows: clean water +0.3% CF-5C +0.3% COP-1.
Preferably, the opening pressure of the spray gun sliding sleeve in the step (5) is higher than the set opening pressure of the spray gun sliding sleeve.
Preferably, the jet displacement for realizing sand blasting perforation in the step (6) is 1.0-2.5 m3/min。
Preferably, in the mixed solution of quartz sand in the step (6), the quartz sand is 20-40 meshes, and the volume ratio of the quartz sand to the mixed solution is 5-15%.
Preferably, the pad fluid in the step (6) is the active water in the step (4), and the sand-carrying fluid is water-based guanidine gum or clean fracturing fluid.
Preferably, the fluid displacement of the fluid pumped into the annular space in the step (6) is 0.3-0.6 m3/min。
The integrated pipe column for drilling, perforating and fracturing adopts a composite drilling mode, a drill bit and an underground power motor are arranged on the pipe column, a pressure-opening sliding sleeve hydraulic spray gun is connected onto the underground power motor, and the specific modification position of a reservoir can be determined by lifting the integrated pipe column.
The invention has the beneficial effects that:
(1) the invention discloses an integrated transformation method for an open hole well completion reservoir of a windowing sidetracking well, and provides an integrated technical method for windowing sidetracking well, perforation and fracturing, wherein a drilling rod for drilling is combined with a hydraulic spray gun to realize integrated operation of drilling, perforation and fracturing, and the integrated transformation method for the reservoir realizes the following steps: 1. Reservoir transformation can be implemented by completing the well with the open hole, and the processes are seamlessly connected; 2. hydraulic sand blasting perforation fixed-point fracturing can be realized; 3. hydraulic packing replaces mechanical packing, multi-section transformation is realized by one pipe column, construction is simple, construction period is short, efficiency is high, and the purpose of reducing reservoir damage is achieved;
(2) the invention discloses a reservoir integrated transformation method, which aims at low-efficiency wells and engineering abandoned wells, fully utilizes the original shaft, aims at open hole completion of window side drilling, and achieves the purposes of exploiting the potential of oil reservoirs and improving the development benefit of oil fields;
(3) the reservoir integrated transformation method disclosed by the invention fully utilizes a well mouth device of a drilling well, does not need to replace a well mouth and a tubing head, only needs to access conventional fracturing transformation equipment and a manifold after open hole well completion, and can put into normal perforating and fracturing operation after the whole pressure test is qualified;
(4) the invention discloses an integrated reservoir stratum reconstruction method.A hydraulic spray gun in a drilling, perforating and fracturing integrated tubular column is started by throwing balls, so that the hydraulic sand-blasting perforating and annular sand-adding segmented fracturing process can be met, the construction efficiency is improved, and the smooth construction is ensured.
Drawings
FIG. 1 is a drilling, perforating and fracturing integrated tubular string;
FIG. 2 is a schematic view of a windowed sidetrack well.
As shown in fig. 1: use horizontal well flip-chip combination in the sidetracking well hole, between spiral stabilizer 4 and drilling rod 6, connect pressure open-type sliding sleeve spray gun through becoming the discount joint, the specific combination is: the drilling head + the single current valve + the single bending screw drilling tool + the spiral stabilizer + the variable buckle joint + the pressure open type sliding sleeve spray gun + the variable buckle joint + the non-magnetic pressure bearing drill rod + the weighted drill rod + the drill rod;
in the integrated modification method of the reservoir disclosed by the invention, the functions of the integrated tubular column in three stages of drilling, perforating and fracturing are different in different stages, and in the step (1) and the step (2), the integrated tubular column is respectively used as a tubular column for horizontal drilling and a tubular column for perforating; in the step (6) and the step (7), the integrated pipe column is used as a fracturing pipe column;
as shown in figure 2, the main borehole 1 becomes a low-efficiency well due to engineering abandonment or entering the later development stage, a suspended cement plug 3 is drilled in the main borehole 1 for packing, then casing windowing operation is carried out at a sidetrack drilling point 4, and finally the sidetrack drilling borehole 2 is drilled for open hole completion.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode with the attached drawings.
Example 1
A windowing sidetrack drilling open hole well completion reservoir integrated transformation method is characterized in that a fracturing truck, a sand mixing truck, an instrument truck, a fracturing manifold truck, an acid tank and a liquid storage tank group are required to be equipped after sidetrack drilling is completed except for a conventional drilling wellhead device, the fracturing manifold truck is equipped with a low-pressure manifold and a high-pressure manifold, the instrument truck is equipped with a monitoring instrument, the rated working pressure of the wellhead device is determined according to the fracturing construction pressure, and the drilling perforation and fracturing integrated method comprises the following specific steps:
(1) as shown in fig. 2, according to the well depth of the windowing sidetrack drilling point, the main well bore 1 is provided with a suspended cement plug 3 to seal the lower part of the main well bore 1, and the upper part of the main well bore 1 is used as the upper part of the sidetrack drilling well bore;
(2) a windowing sidetracking drilling tool assembly is put in, a sidetracking drilling is carried out at a sidetracking point 4 until a drill bit is predicted to be capable of drilling to a target layer, the drill is pulled out, a drilling perforation and fracturing integrated pipe column is put in, and the drill is put in;
(3) drilling to the bottom and continuously drilling to the well depth of the completed well, and circularly cleaning the well;
(4) connecting a pipe manifold of a ground well drilling wellhead device into a fracturing manifold, carrying out pressure test on the whole of the well drilling manifold and the fracturing manifold for 30min, and ensuring that the pressure test is qualified without puncture and leakage;
(5) replacing the slurry for drilling in the shaft with active water, washing the well until the water color of the inlet and the outlet is consistent, wherein the using amount of the active water is not less than 1.5 times of the volume of the shaft; the formula of the active water is as follows: clear water +0.3% CF-5C +0.3% COP-1;
(6) lifting the drilling, perforating and fracturing integrated pipe column in the step (1) to a preset position, throwing balls, pumping perforating fluid into the pipe column, sending the balls to a spray gun ball seat, opening a spray gun sliding sleeve by collision pressure, and establishing a hydraulic jet channel under the pressure of 15 MPa;
(7) pumping quartz sand mixed liquid into the drilling, perforating and fracturing integrated pipe column in the step (1) to realize sand blasting and perforating, wherein the jet displacement is 1.0m3Min; in the mixed liquid of the quartz sand, the quartz sand is 20 meshes, and the volume ratio of the quartz sand to the mixed liquid is 5%;
(8) after the sand blasting perforation is finished, the jet discharge capacity is reduced to 1.0m3Min, reducing oil pipe displacement to 1.4 m3Min, when the casing pressure of the sliding sleeve reaches 40MPa, the casing pressure is kept at about 35MPa by controlling the jet discharge capacity, the vertical amplitude does not exceed 1MPa, the casing gate of the spray gun sliding sleeve is quickly closed, the pressure is suppressed, after the stratum is broken, the annular space starts to pump fluid, the discharge capacity is 0.3m3Min, maintaining the annular pressure below the fracture extension pressure, and then entering the main fracturing construction program to increase the jet displacement to 2m3The fracturing fluid is prepared by sequentially pumping a pad fluid, a sand carrying fluid and a displacing fluid for fracturing;
if the stratum is not pressed after the pressure is suppressed, increasing the jet displacement, stopping the pump immediately when the casing pressure exceeds 55MPa, pre-treating the forward extrusion acid liquid until the stratum is pressed, and then performing subsequent construction;
wherein the pad fluid is the active water in the step (4), and the sand-carrying fluid is water-based guanidine gum;
(9) and (3) lifting the drilling perforation and fracturing integrated pipe column in the step (1) to the previous fracturing position, repeating the step (7) and the step (8), and circulating in this way until fracturing of the whole well section is finished, thereby completing the integrated transformation of the open hole well completion reservoir of the open window side drilling.
Example 2
A windowing sidetrack drilling open hole well completion reservoir integrated transformation method is characterized in that a fracturing truck, a sand mixing truck, an instrument truck, a fracturing manifold truck, an acid tank and a liquid storage tank group are required to be equipped after sidetrack drilling is completed except for a conventional drilling wellhead device, the fracturing manifold truck is equipped with a low-pressure manifold and a high-pressure manifold, the instrument truck is equipped with a monitoring instrument, the rated working pressure of the wellhead device is determined according to the fracturing construction pressure, and the drilling perforation and fracturing integrated method comprises the following specific steps:
(1) as shown in fig. 2, according to the well depth of the windowing sidetrack drilling point, the main well bore 1 is provided with a suspended cement plug 3 to seal the lower part of the main well bore 1, and the upper part of the main well bore 1 is used as the upper part of the sidetrack drilling well bore;
(2) a windowing sidetracking drilling tool assembly is put in, a sidetracking drilling is carried out at a sidetracking point 4 until a drill bit is predicted to be capable of drilling to a target layer, the drill is pulled out, a drilling perforation and fracturing integrated pipe column is put in, and the drill is put in;
(3) drilling to the bottom and continuously drilling to the well depth of the completed well, and circularly cleaning the well;
(4) connecting a pipe manifold of a ground well drilling wellhead device into a fracturing manifold, carrying out pressure test on the whole of the well drilling manifold and the fracturing manifold for 30min, and ensuring that the pressure test is qualified without puncture and leakage;
(5) replacing the slurry for drilling in the shaft with active water, washing the well until the water color of the inlet and the outlet is consistent, wherein the using amount of the active water is not less than 1.5 times of the volume of the shaft; the formula of the active water is as follows: clear water +0.3% CF-5C +0.3% COP-1;
(6) lifting the drilling, perforating and fracturing integrated pipe column in the step (1) to a preset position, throwing balls, pumping perforating fluid into the pipe column, sending the balls to a spray gun ball seat, opening a spray gun sliding sleeve by collision pressure, and establishing a hydraulic jet channel under the pressure of 15 MPa;
(7) pumping quartz sand mixed liquid into the drilling, perforating and fracturing integrated pipe column in the step (1) to realize sand blasting and perforating, wherein the jet displacement is 2.5m3Min; in the mixed liquid of the quartz sand, the quartz sand is 40 meshes, and the volume ratio of the quartz sand to the mixed liquid is 15%;
(8) after the sand blasting perforation is finished, the jet discharge capacity is reduced to 1.6m3Min, oilThe discharge capacity of the pipe is reduced to 1.4 m3Min, when the casing pressure of the sliding sleeve reaches 40MPa, the casing pressure is kept at about 35MPa by controlling the jet discharge capacity, the vertical amplitude does not exceed 1MPa, the casing gate of the spray gun sliding sleeve is quickly closed, the pressure is suppressed, after the stratum is broken, the annular space starts to pump fluid, the discharge capacity is 0.6m3Min, maintaining the annular pressure below the fracture extension pressure, and then entering the main fracturing construction program to increase the jet displacement to 2m3The fracturing fluid is prepared by sequentially pumping a pad fluid, a sand carrying fluid and a displacing fluid for fracturing;
if the stratum is not pressed after the pressure is suppressed, increasing the jet displacement, stopping the pump immediately when the casing pressure exceeds 55MPa, pre-treating the forward extrusion acid liquid until the stratum is pressed, and then performing subsequent construction;
wherein the pad fluid is the active water in the step (4), and the sand-carrying fluid is a clean fracturing fluid;
(9) and (3) lifting the drilling perforation and fracturing integrated pipe column in the step (1) to the previous fracturing position, repeating the step (7) and the step (8), and circulating in this way until fracturing of the whole well section is finished, thereby completing the integrated transformation of the open hole well completion reservoir of the open window side drilling.
Example 3
A windowing sidetrack drilling open hole well completion reservoir integrated transformation method is characterized in that a fracturing truck, a sand mixing truck, an instrument truck, a fracturing manifold truck, an acid tank and a liquid storage tank group are required to be equipped after sidetrack drilling is completed except for a conventional drilling wellhead device, the fracturing manifold truck is equipped with a low-pressure manifold and a high-pressure manifold, the instrument truck is equipped with a monitoring instrument, the rated working pressure of the wellhead device is determined according to the fracturing construction pressure, and the drilling perforation and fracturing integrated method comprises the following specific steps:
(1) as shown in fig. 2, according to the well depth of the windowing sidetrack drilling point, the main well bore 1 is provided with a suspended cement plug 3 to seal the lower part of the main well bore 1, and the upper part of the main well bore 1 is used as the upper part of the sidetrack drilling well bore;
(2) a windowing sidetracking drilling tool assembly is put in, a sidetracking drilling is carried out at a sidetracking point 4 until a drill bit is predicted to be capable of drilling to a target layer, the drill is pulled out, a drilling perforation and fracturing integrated pipe column is put in, and the drill is put in;
(3) drilling to the bottom and continuously drilling to the well depth of the completed well, and circularly cleaning the well;
(4) connecting a pipe manifold of a ground well drilling wellhead device into a fracturing manifold, carrying out pressure test on the whole of the well drilling manifold and the fracturing manifold for 30min, and ensuring that the pressure test is qualified without puncture and leakage;
(5) replacing the slurry for drilling in the shaft with active water, washing the well until the water color of the inlet and the outlet is consistent, wherein the using amount of the active water is not less than 1.5 times of the volume of the shaft; the formula of the active water is as follows: clear water +0.3% CF-5C +0.3% COP-1;
(6) lifting the drilling, perforating and fracturing integrated pipe column in the step (1) to a preset position, throwing balls, pumping perforating fluid into the pipe column, sending the balls to a spray gun ball seat, opening a spray gun sliding sleeve by collision pressure, and establishing a hydraulic jet channel under the pressure of 15 MPa;
(7) pumping quartz sand mixed liquid into the drilling, perforating and fracturing integrated pipe column in the step (1) to realize sand blasting and perforating, wherein the jet displacement is 1.8m3Min; in the mixed liquid of the quartz sand, the quartz sand is 30 meshes, and the volume ratio of the quartz sand to the mixed liquid is 9%;
(8) after the sand blasting perforation is finished, the jet discharge capacity is reduced to 1.3m3Min, reducing oil pipe displacement to 1.4 m3Min, when the casing pressure of the sliding sleeve reaches 40MPa, the casing pressure is kept at about 35MPa by controlling the jet discharge capacity, the vertical amplitude does not exceed 1MPa, the casing gate of the spray gun sliding sleeve is quickly closed, the pressure is suppressed, after the stratum is broken, the annular space starts to pump fluid, the discharge capacity is 0.5m3Min, maintaining the annular pressure below the fracture extension pressure, and then entering the main fracturing construction program to increase the jet displacement to 2m3The fracturing fluid is prepared by sequentially pumping a pad fluid, a sand carrying fluid and a displacing fluid for fracturing;
if the stratum is not pressed after the pressure is suppressed, increasing the jet displacement, stopping the pump immediately when the casing pressure exceeds 55MPa, pre-treating the forward extrusion acid liquid until the stratum is pressed, and then performing subsequent construction;
wherein the pad fluid is the active water in the step (4), and the sand-carrying fluid is water-based guanidine gum;
(9) and (3) lifting the drilling perforation and fracturing integrated pipe column in the step (1) to the previous fracturing position, repeating the step (7) and the step (8), and circulating in this way until fracturing of the whole well section is finished, thereby completing the integrated transformation of the open hole well completion reservoir of the open window side drilling.
Claims (7)
1. A windowing sidetrack drilling open hole well completion reservoir integrated transformation method is characterized by comprising the following steps:
the drilling, perforating and fracturing integrated tubular column is formed by sequentially connecting a drill bit, a check valve, a single-bent screw drilling tool, a spiral stabilizer, a buckle connector, a pressure-opening sliding sleeve spray gun, a buckle connector, a non-magnetic pressure-bearing drill rod, a weighted drill rod, a weighted drill rod and a drill rod;
the integrated transformation method of the open hole well completion reservoir of the window sidetracking well, which is completed by using the integrated drilling perforation and fracturing pipe string, comprises the following steps:
(1) according to the completion drilling depth of the open hole well completion and the drilling footage of the drill bit, the main well hole is drilled with a suspended cement plug to seal the lower part of the main well hole, the upper part of the main well hole is used as the upper part of the sidetrack drilling hole, the windowing sidetrack drilling tool assembly is put in, when one drill bit can be predicted to reach a target layer at the sidetrack drilling point, the combined drilling, perforating and fracturing integrated pipe column is pulled out and drilled;
(2) the step (1) of drilling, continuing to drill to the full depth of the drilled well, and circularly cleaning the well;
(3) connecting a pipe manifold of a ground well drilling wellhead device into a fracturing manifold, carrying out pressure test on the whole of the well drilling manifold and the fracturing manifold for 30min, and ensuring that the pressure test is qualified without puncture and leakage;
(4) replacing the slurry for drilling in the shaft with active water, washing the well until the water color of the inlet and the outlet is consistent, wherein the using amount of the active water is not less than 1.5 times of the volume of the shaft;
(5) lifting the drilling, perforating and fracturing integrated pipe column in the step (1) to a preset position, throwing balls in the integrated pipe column, pumping perforating fluid to deliver the balls, delivering the balls to a spray gun ball seat, opening a spray gun sliding sleeve by impacting and pressing, and establishing a hydraulic jet channel;
(6) after the hydraulic jet channel is established in the step (5), pumping quartz sand mixed liquid to realize sand-blasting perforation, after the perforation is finished, reducing jet discharge to 1.0-1.6 m3/min, rapidly closing a sleeve gate of the spray gun sliding sleeve, after the stratum is fractured, pumping fluid into the annular space, keeping the annular space pressure lower than the fracture extension pressure, then entering a main fracturing construction program, increasing the jet discharge to the designed fracturing discharge, and sequentially pumping pad fluid, sand-carrying fluid and displacing fluid to perform fracturing;
(7) and (3) lifting the drilling perforation and fracturing integrated pipe column in the step (1) to the previous fracturing position, repeating the step (6), and circulating in such a way until fracturing of the whole well section is finished to finish integrated transformation of the open hole well completion reservoir of the open window side drilling.
2. The integrated reformation method for an open-hole completed reservoir in window sidetracking drilling according to claim 1, characterized in that: the formula of the active water in the step (4) is as follows: clean water +0.3% CF-5C +0.3% COP-1.
3. The integrated reformation method for an open-hole completed reservoir in window sidetracking drilling according to claim 2, characterized in that: and (5) the opening pressure of the spray gun sliding sleeve is higher than the opening pressure set by the spray gun sliding sleeve.
4. The integrated reformation method for an open hole completed reservoir in window sidetracking drilling according to claim 3, characterized in that: the jet displacement for realizing the sand blasting perforation in the step (6) is 1.0-2.5 m3/min。
5. The integrated reformation method for an open hole completed reservoir in window sidetracking drilling according to claim 3, characterized in that: in the mixed liquid of the quartz sand in the step (6), the quartz sand is 20-40 meshes, and the volume ratio of the quartz sand to the mixed liquid is 5-15%.
6. The integrated reformation method for an open hole completed reservoir in window sidetracking drilling according to claim 5, characterized in that: the pad fluid in the step (6) is the active water in the step (4), and the sand-carrying fluid is water-based guanidine gum or clean fracturing fluid.
7. The integrated reformation method for an open-hole completed reservoir in window sidetracking drilling according to claim 6, characterized in that: the fluid displacement of the fluid pumped into the annular space is 0.3-0.6 m3/min。
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| CN2310148Y (en) * | 1997-11-25 | 1999-03-10 | 胜利石油管理局采油工艺研究院 | Multi-function completedwell limb for horizontal well |
| CN1948702A (en) * | 2005-10-10 | 2007-04-18 | 中国石油天然气集团公司 | Well drilling method of multibranch well |
| CN101059070A (en) * | 2006-04-21 | 2007-10-24 | 中国石油天然气股份有限公司 | Perforation, fracturing integrated method and its technique pipe |
| CN100549358C (en) * | 2006-05-23 | 2009-10-14 | 辽河石油勘探局 | A kind of fish bone type branch well drilling and completing method |
| CN101624904B (en) * | 2009-08-14 | 2012-07-25 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Open hole completion well sand resistant pipe string of sidetracking branch well and inserting type acid cleaning filling inner pipe string thereof |
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| CN104100250A (en) * | 2013-04-15 | 2014-10-15 | 中国石油化工股份有限公司 | Integrated pipe column system and fracturing process method for staged fracturing well completion of open hole horizontal well |
| CN104895498B (en) * | 2014-03-04 | 2017-03-29 | 中国石油大学(北京) | Coiled tubing band screen casing sidetracking is drilled well integrated apparatus and method |
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