CN103912257A - Pressure dragging layering fracturing device - Google Patents
Pressure dragging layering fracturing device Download PDFInfo
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- CN103912257A CN103912257A CN201410174432.4A CN201410174432A CN103912257A CN 103912257 A CN103912257 A CN 103912257A CN 201410174432 A CN201410174432 A CN 201410174432A CN 103912257 A CN103912257 A CN 103912257A
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Abstract
The invention discloses a pressure dragging layering fracturing device. The pressure dragging layering fracturing device comprises a ground device and a downhole tool string. The downhole tool string comprises a conical plug, a packer, a hydraulic power spraying gun, a coupling oil pipe, an abrasion-resisting one-way valve and a non-coupling oil pipe, all of which are connected in sequence. The ground device comprises a large well mouth four-way part, a double ram type preventer, a spraying-preventing box and an ejecting-preventing pneumatic slip. The upper end of the non-coupling oil pipe is connected with a lifting sub which is hung through a lift sub and a workover rig large-hook flying ring. The flying ring moves up and down to drag the non-coupling oil pipe to slide in the spraying-preventing box. A high-pressure elbow and a high-pressure soft pipe line are connected to the lifting sub in sequence. The high-pressure soft pipe line is connected with a ground high-pressure steel pipe line of a first fracture vehicle set. The steel pipe line is provided with a high-pressure tee joint which is provided with a plug valve for releasing pressure of the pipe lines, and the well mouth four-way part is connected with a second fracture vehicle set. By means of the combination of the double ram type preventer, the spraying-preventing box and the non-coupling oil pipe, a tubular column is directly lifted by a common workover rig under the well mouth pressure situation, the risk that the tubular column is clamped by sand is reduced to the maximum extent, and the layering fracture efficiency and the cost performance are greatly improved.
Description
Technical field
The present invention relates to a kind of fracturing device of oil-gas field development application, especially a kind of multiple fracturing device that drags with pressure that improves pressure break efficiency, reduces operating cost.
Background technology
Hydraulic sand blasting packer layered fracturing technique is widely applied in hyposmosis and unconventional oil gas field at present.Tail band packer abrasive perforating separate stratum fracfturing technology adopts coiled tubing and conventional workover rig to drag two kinds of modes.Coiled tubing tail band packer abrasive perforating multiple fracturing device can be realized the tubing string that drags with pressure, there is the interval velocity of changing fast, the advantage of short construction period, but have that construction cost is high, a shortcoming such as the accurate location difficulty of downhole tool (cannot accurately locate for thin layer), oil pipe tension load are low, cannot rotate; Conventional oil pipe tail band packer abrasive perforating multiple fracturing device, have that cost is low, the unrestricted advantage of the pressure break number of plies, after but every lamination splits, need open flow discharge opeing, anti-flushing well and dismounting well head, exist open flow process easily to shake out and card instrument, frequent dismounting well head labour intensity are large, the shortcoming of long construction period.
Summary of the invention
Technical problem to be solved by this invention is, a kind of combination that adopts double ram type preventer, blowout prevention box, nothing joint hoop oil pipe is provided, use conventional workover rig direct upper lifting pipe post in wellheadpressure situation, can reduce to greatest extent sand card tubing string risk, shorten construction period and reduce construction cost, significantly improve the multiple fracturing device that drags with pressure of separate stratum fracfturing efficiency and cost performance.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of multiple fracturing device that drags with pressure, comprise ground installation and underground tool string, underground tool string comprises successively the cone blocking, packer, the waterpower spray gun that connect, has collar oil line, erosion resistant ball-and-seat, integral joint tubing; Well head big four corresponding to pressure rank when ground installation comprises with pressure break, on well head big four, double ram type preventer is installed, on double ram type preventer, connect blowout prevention box, on blowout prevention box, connect anti-upper top air operated slips, pass successively well head big four, double ram type preventer, blowout prevention box and anti-upper top air operated slips without joint hoop oil pipe upper end, connecting lifting sub without joint hoop oil pipe upper end, lifting sub is hung by elevator and the large hook suspension ring of workover rig, suspension ring move up and down, and drag integral joint tubing and slide in blowout prevention box; On lifting sub, connect successively high-pressure-movable bend and high-pressure hose line, high-pressure hose line is connected with the ground high pressure steel pipeline of fracturing unit truck group one, installation high-voltage threeway on steel pipeline, on Highpressure Tee, dress is for the plug valve of pipeline pressure release, on plug valve, be connected with churning and fill with, well head four-way is connected with fracturing unit truck group two.
The total length of described integral joint tubing is greater than the distance that instrument need to move.
Described blowout prevention box, double ram type preventer, well head big four connect by flange and seal, and anti-upper top air operated slips connects by flange and is fixed on blowout prevention box top.
The integral joint tubing of described lifting sub and bottom is by screwed connection, and lifting sub is connected by oil with high-pressure hose line with high-pressure-movable bend, the high-pressure-movable bend on top the ninth of the ten Heavenly Stems.
Described double ram type preventer and the sealing load of blowout prevention box are not less than 70MPa, and anti-interior pressure of high-pressure hose line is not less than 70MPa.
The invention has the beneficial effects as follows: fracturing device of the present invention has been abandoned with traditional fracture well head of hanging on production tree and tubing hanger combines, can realize conventional workover rig drag fracturing tubing string with pressure, after pressing crack construction, utilize ball-and-seat sealing oil pipe, blowout prevention box and without joint hoop oil pipe Seal Oil cover annular space, the in the situation that of wellheadpressure and positive well-flushing, directly with carrying fracturing string on the large load of workover rig, realize the function of with pressure pipe, significantly reduce cost of equipment, avoid open flow after pressure break, well-flushing, the operation of dismounting well head, shorten construction period, reduce the risk that formation sand production blocks tubing string, having reduced unlimited well head plays borehole fluid in Tubing During Running and overflows the pollution to environment.
Brief description of the drawings
Fig. 1 is the structural representation that drags multiple fracturing device with pressure of the present invention.
In figure: 1, cone blocking; 2, packer; 3, waterpower spray gun; 4, there is collar oil line; 5, erosion resistant ball-and-seat; 6, integral joint tubing; 7, well head big four; 8, double ram type preventer; 9, blowout prevention box; 10, anti-upper top air operated slips; 11, elevator; 12, lifting sub; 13, suspension ring; 14, high-pressure-movable bend; 15, high-pressure hose line; 16, Highpressure Tee; 17, fracturing unit truck group one; 18, fracturing unit truck group two; 19, plug valve; 20, open flow tank; 21, the first fractured layer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, the multiple fracturing device that drags with pressure of the present invention, comprises ground installation and underground tool string, and underground tool string comprises successively the cone blocking 1, packer 2, the waterpower spray gun 3 that connect, has collar oil line 4, erosion resistant ball-and-seat 5, integral joint tubing 6; Well head big four 7 corresponding to pressure rank when ground installation comprises with pressure break, double ram type preventer 8 is installed on well head big four 7, on double ram type preventer 8, connect blowout prevention box 9, on blowout prevention box 9, connect anti-upper top air operated slips 10, pass successively well head big four 7, double ram type preventer 8, blowout prevention box 9 and anti-upper top air operated slips 10 without joint hoop oil pipe 6 upper ends, connecting lifting sub 12 without joint hoop oil pipe 6 upper ends, lifting sub 12 is hung by elevator 11 and the large hook suspension ring 13 of workover rig, suspension ring move up and down, and drag integral joint tubing 6 in the interior slip of blowout prevention box 9; On lifting sub 12, connect successively high-pressure-movable bend 14 and high-pressure hose line 15, high-pressure hose line 15 is connected with the ground high pressure steel pipeline of fracturing unit truck group 1, installation high-voltage threeway 16 on steel pipeline, on Highpressure Tee 16, dress is for the plug valve 19 of pipeline pressure release, on plug valve 19, be connected with churning and fill with 20, well head four-way 7 is connected with fracturing unit truck group 2 18.
The total length of described integral joint tubing 6 is greater than the distance that instrument need to move.
Described blowout prevention box 9, double ram type preventer 8, well head big four 7 connect by flange and seal, and anti-upper top air operated slips 10 connects by flange and is fixed on blowout prevention box 9 tops.
Described lifting sub 12 is with the integral joint tubing 6 of bottom by screwed connection, and lifting sub 12 is connected by oil with high-pressure hose line 15 with high-pressure-movable bend 14, the high-pressure-movable bend 14 on top the ninth of the ten Heavenly Stems.
Described double ram type preventer 8 and the sealing load of blowout prevention box 9 are not less than 70MPa, and anti-interior pressure of high-pressure hose line 15 is not less than 70MPa.
The multiple fracturing device that drags with pressure of the present invention is installed in accordance with the following steps and uses:
Step 1, as shown in the figure, equipment is installed; First, while changing with pressure break, well head big four 7 corresponding to pressure rank installed ram preventer 8 on well head big four 7;
Secondly, by cone blocking 1, packer 2, waterpower spray gun 3, have joint hoop oil pipe 4, erosion resistant ball-and-seat 5, without joint hoop oil pipe 6 successively by screwed connection, they have formed underground tool string, by underground tool string G.I.H, allow spray gun aim at fractured layer, binding round oil pipe 6 tops by screwed connection lifting sub 12 without joint, the joint hoop on lifting sub 12 tops is made on elevator 11, lifting sub 12 passes from blowout prevention box 9 centers, blowout prevention box 9 is connected and fixed by flange with ram preventer 8, and lifting sub 12 is hung by the suspension ring 13 of elevator 11 and the large hook of workover rig.
Then, lifting sub 12 connects high-pressure-movable bend 14 and high-pressure hose line 15 by union variable buckle, high-pressure hose line 15 is connected with Highpressure Tee 16 one end, the other two ends of Highpressure Tee 16 are connected with fracturing unit truck group one 17 ground high pressure steel pipelines and plug valve 19 respectively, plug valve 19 also can replace with flap type, be mainly used in pipeline pressure release, well head big four 7 is connected with another group fracturing unit truck group 2 18.
Step 2, first floor pressing crack construction; By on put and put the first set packer 2 of lifting sub 12, method inspection packer 2 sealings that adopt pit shaft pressure measurement to fall, confirm packer 2 set normal after, that closes ram preventer 8 partly seals flashboard, compresses blowout prevention box 9, pressure break first floor 21, carry out pressure break according to first floor construction sequence, high-pressure fluid is opened the erosion resistant ball-and-seat 5 in oil pipe, and fluid carries out perforation by oil pipe and waterpower spray gun 3 to the first fractured layer 21, after perforation, carry out pressure break by oil jacket annular space;
Step 3, band presses the instrument of carrying; After pressure break finishes, open flashboard open flow device 8, oil pipe small displacement limit pumping liquid, the direct upper lifting pipe post of workover rig deblocking packer 2 for lateral dominance, allows downhole tool move to behind perforated interval top, and oil pipe stops infusion;
Step 4, pressure release in oil pipe; Open 19 pressure releases of ground plug valve, now the erosion resistant ball-and-seat 5 in oil pipe is closed automatically, the high-pressure fluid on erosion resistant ball-and-seat 5 tops enters open flow tank 20 by surface line, pressure leak process is until confirm that oil pipe internal pressure is to finish at 1 o'clock, high-pressure-movable bend 14 and the high-pressure hose line 15 on dismounting lifting sub 12 tops;
Step 5, Drag tool with pressure; Use the workover rig integral joint tubing 6 that trips out Len req with pressure, waterpower spray gun 3 is aimed at behind lower one deck position of pressing, reconnecting and promoting short circuit 12, high-pressure-movable bend 14 and high-pressure hose line 15 without joint hoop oil pipe 6 tops;
Step 6, succeeding layer pressure break; After in first floor pressing crack construction and oil pipe, pressure release completes, on waterpower spray gun 3, to carry to next fractured layer, repeating step 2, to the process of step 5, carries out pressure break to fractured interval below, until the whole pressure breaks of interval are complete;
This tool string generally continuously pressure break more than 10 layers, in the time that the order according to is from bottom to top constructed to each fractured interval, often complete after the pressing crack construction of an interval, need to judge downhole tool state.If instrument normally, is proceeded drag fracturing construction with pressure; If waterpower spray gun 3 pressure are on the low side or packer 2 lost efficacy, should upper lifting pipe post to fractured layer safety top position, after open flow, backwash kill-job, pull out of hole and change downhole tool.
Wherein, the injection pressing crack construction of construction interval, the specific operation process of step 2 is technical methods conventional in this area, is not describing in detail at this.
The method is aimed at pressure break interval of interest by removing without joint hoop oil pipe 6 by tool string; Utilize erosion resistant ball-and-seat 5 automatically to open and close under hydraulic action; Packer 2 inside have changement to realize to put put set and on put forward the function of deblocking; Blowout prevention box 9 and double ram type preventer 8 double seal oil sets annular spaces, ensureing in fracturing process not can seepage, has replaced the little four-way of conventional pressure break, has reduced the time of dismounting well head; Blowout prevention box 9 Seal Oil covers annular spaces, with pressure dragging without joint hoop oil pipe 6 with tool string to next pressure break interval of interest, reduces open flow, washes the kill-job time, the average single hop 5-8 hour that saves time.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the common method of the industry, here not in narration one by one.
The present invention can be applicable in Oil/gas Well multilevel hierarchy staged fracturing acidizing treatment, on realizing under wellheadpressure condition, carry fracturing string, be applicable to operation and the exploitation in the fields such as oil, natural gas, coal bed gas, tight gas and shale gas, can significantly reduce operating cost, improve pressure break efficiency, have a good application prospect.
In sum, content of the present invention is not limited in the above-described embodiment, and the knowledgeable people in same area can propose easily other embodiment within technological guidance's thought of the present invention, but this embodiment comprises within the scope of the present invention.
Claims (5)
1. the multiple fracturing device that drags with pressure, comprise ground installation and underground tool string, it is characterized in that, underground tool string comprises successively the cone blocking (1), packer (2), the waterpower spray gun (3) that connect, has collar oil line (4), erosion resistant ball-and-seat (5), integral joint tubing (6), well head big four (7) corresponding to pressure rank when ground installation comprises with pressure break, at the upper double ram type preventer (8) of installing of well head big four (7), at the upper blowout prevention box (9) that connects of double ram type preventer (8), upper connection of blowout prevention box (9) prevented upper top air operated slips (10), pass successively well head big four (7) without joint hoop oil pipe (6) upper end, double ram type preventer (8), blowout prevention box (9) and anti-upper top air operated slips (10), connecting lifting sub (12) without joint hoop oil pipe (6) upper end, lifting sub (12) is hung by elevator (11) and the large hook suspension ring of workover rig (13), suspension ring move up and down, drag integral joint tubing (6) slides in blowout prevention box (9), on lifting sub (12), connect successively high-pressure-movable bend (14) and high-pressure hose line (15), high-pressure hose line (15) is connected with the ground high pressure steel pipeline of fracturing unit truck group one (17), installation high-voltage threeway (16) on steel pipeline, the upper dress of Highpressure Tee (16) is for the plug valve (19) of pipeline pressure release, on plug valve (19), be connected with churning and fill with (20), well head four-way (7) is connected with fracturing unit truck group two (18).
2. the multiple fracturing device that drags with pressure according to claim 1, is characterized in that, the total length of described integral joint tubing (6) is greater than the distance that instrument need to move.
3. the multiple fracturing device that drags with pressure according to claim 1, it is characterized in that, described blowout prevention box (9), double ram type preventer (8), well head big four (7) connect by flange and seal, and anti-upper top air operated slips (10) connects by flange and is fixed on blowout prevention box (9) top.
4. the multiple fracturing device that drags with pressure according to claim 1, it is characterized in that, described lifting sub (12) is with the integral joint tubing (6) of bottom by screwed connection, and lifting sub (12) is connected by oil with high-pressure hose line (15) with high-pressure-movable bend (14), the high-pressure-movable bend (14) on top the ninth of the ten Heavenly Stems.
5. the multiple fracturing device that drags with pressure according to claim 1, it is characterized in that, described double ram type preventer (8) and the sealing load of blowout prevention box (9) are not less than 70MPa, and anti-interior pressure of high-pressure hose line (15) is not less than 70MPa.
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| CN201410174432.4A CN103912257B (en) | 2014-04-28 | 2014-04-28 | A kind of dragging multiple fracturing device with pressure |
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| CN104612651A (en) * | 2015-01-26 | 2015-05-13 | 中国石油天然气股份有限公司 | Acidizing and blockage removing device and method for screen pipe well completion horizontal well with deformed casing |
| CN104863508A (en) * | 2015-04-30 | 2015-08-26 | 山西蓝焰煤层气集团有限责任公司 | Lower-pressure jetting reversed-drawing pore-forming technology in radial direction well construction |
| CN106014370A (en) * | 2016-07-13 | 2016-10-12 | 北京龙恒业石油工程技术有限公司 | Oil-pipe under-pressure dragging fracturing device and technology |
| CN111305787A (en) * | 2018-12-11 | 2020-06-19 | 中国石油化工股份有限公司 | Well completion method for carbonate reservoir ultra-deep horizontal well |
| CN113374461A (en) * | 2021-07-12 | 2021-09-10 | 山西沁盛煤层气作业有限责任公司 | Method for dragging underground pipe string under pressure |
| CN113464081A (en) * | 2020-03-30 | 2021-10-01 | 中国石油化工股份有限公司 | Coal bed gas micro-strip pressure well repairing process |
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Effective date of registration: 20210210 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106, Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |