Cable-free pumping horizontal well bridge plug perforating device and perforating method

Abstract

The invention discloses a cable-free pumping horizontal well bridge plug perforating device which comprises a perforating pipe string, the perforating pipe string comprises a fishing head, a hoisting ring, at least one stage of perforator, a control pup joint, a setting tool and a bridge plug which are sequentially connected, and each stage of perforator comprises a shell and a detonating cord. A plurality of launching hole bullets and an ignition control chip are sequentially arranged in a shell of the perforator in the direction from the hoisting ring to the control short circuit, a detonating cord is sequentially wound on the launching hole bullets and then connected with a detonator at the lowermost end of the detonating cord, an ignition wire of the detonator is connected with the ignition control chip, and the ignition control chips of all the perforators are sequentially connected in series through signal communication lines. The problems that according to a cable conveying hydraulic pumping perforation method in the prior art, the cable lowering speed is not matched with the actual conveying speed of a perforation pipe string easily, and weak point pump breakage is easily caused are solved. The invention further discloses a cable-free pumping horizontal well bridge plug perforation method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of horizontal well segmented multistage fracturing cable pumping perforation and bridge plug combined process, and relates to a cable-free pumping horizontal well bridge plug perforation device, and further relates to a cable-free pumping horizontal well bridge plug perforation method. BACKGROUND

[0002] With the development of oil and gas fields and the continuous depletion of energy, unconventional oil and gas such as shale gas, tight gas and coalbed gas will become an important successor of future oil and gas resources. However, due to the low porosity and ultra-low permeability characteristics of unconventional oil and gas reservoirs, segmented multistage fracturing stimulation measures must be implemented to see productivity. Therefore, segmented multistage fracturing is the preferred stage for unconventional oil and gas reservoir reconstruction and effective improvement of single well production, and its role is increasingly obvious.

[0003] Segmented multistage fracturing uses bridge shooting combined technology to achieve segmented fracturing of oil and gas wells. This technology uses cable transmission pumping perforator and bridge plug to temporarily isolate the fractured well section, and perforates the unfractured well section to provide fluid injection channel conditions for hydraulic fracturing. Then, the next well section is fractured by using bridge shooting combined technology again after the fracturing is completed.

[0004] At present, the horizontal well bridge shooting combined technology uses cable transportation and hydraulic pumping to transport the perforating pipe string to the perforating section: the cable is lowered at a certain speed in the vertical well section, and the pipe string is transported to the deep wellbore under the action of gravity; when reaching the build-up section, the wellhead starts to pump a certain amount of liquid into the wellbore, and under the action of liquid pumping force, the pipe string passes through the build-up section to the horizontal section and continues to be transported to the predetermined perforating section. Due to the current technical limitations, the speed of the perforating pipe string cannot be obtained in real time during pumping, which easily leads to the mismatch between the cable lowering speed and the actual transportation speed of the perforating pipe string, and easily causes engineering complications such as cable breakage. At the same time, the cable is carried on the perforating engineering vehicle, which increases the cost of operation equipment and personnel.

[0005] Chinese patent "Clustered perforation and staged fracturing combined process" (publication number: CN104879110A) adopts tubing conveyed cluster perforation technology with pressure cable to complete the first stage perforation operation, then fracturing operation, after completion, put the degradable fiber temporary plugging ball to plug the perforation hole, repeat the second stage cluster perforation and fracturing, until the perforation and fracturing operation of the whole well is completed. The patent only describes the cable conveyed cluster perforation method of vertical well, and does not describe the bridge plug setting and perforation combined method of horizontal well. Chinese patent "Horizontal well staged fracturing pumping perforation method" (publication number: CN105317409B) adopts logging cable to carry perforation pipe string device into well; the pipe string is lowered to the high angle section in the well, then liquid is pumped, the liquid pushes the perforation pipe string device to the horizontal well in the well, and the logging cable is electrified to perforate after pumping to the perforation section. The patent describes the cable conveyed hydraulic pumping perforation method, as described in the foregoing section, the method is prone to cause the mismatch between the cable lowering speed and the actual conveying speed of the perforation pipe string, and is prone to cause the weak point pump breakage and other engineering complications. At the same time, a large number of perforation engineering vehicles and other equipment and operation personnel are occupied. SUMMARY

[0006] The purpose of the present application is to provide a cable-free pumping horizontal well bridge plug perforation device, which solves the problem of the cable conveyed hydraulic pumping perforation method in the prior art, which is prone to cause the mismatch between the cable lowering speed and the actual conveying speed of the perforation pipe string, and is prone to cause the weak point pump breakage.

[0007] Another purpose of the present application is to provide a cable-free pumping horizontal well bridge plug perforation method.

[0008] The technical solution adopted by the present application is a cable-free pumping horizontal well bridge plug perforation device, which comprises a perforation pipe string, the perforation pipe string comprises a fishing head, a lifting ring, at least one perforator, a control short circuit, a setting tool and a bridge plug connected in sequence, each perforator comprises a shell and a detonating cord, a plurality of perforating bullets and an ignition control chip are arranged in the shell of the perforator in sequence from the lifting ring to the control short circuit, the detonating cord is wound on each perforating bullet in sequence, and a detonator is connected to the lowermost end of the detonating cord, the ignition line of the detonator is connected to the ignition control chip, and the ignition control chips of the perforators are connected in sequence through a signal communication line.

[0009] Preferably, if the perforator is provided in multiple stages, the plurality of perforators are connected in sequence from the first end, that is, the shells of the plurality of perforators are connected in sequence from the first end, the lower end of the fishing head is connected to the upper end of the shell of the first perforator, and the lowermost end of the shell of the last perforator is connected to the control short circuit.

[0010] Preferably, the control short circuit comprises a shell, the lower end of the shell of the last stage of the perforating gun and the upper end of the setting tool are connected respectively, the integrated control chip, the battery are arranged in the shell of the control short circuit, the integrated control chip is connected with the ignition control chip of the last stage of the perforating gun through the communication line, the integrated control chip is also connected with the setting tool through the setting tool control line, and the integrated control chip is connected with the battery through the wire.

[0011] Preferably, the integrated control chip comprises an ignition signal processor, a data acquisition processor and a depth calculation processor, the ignition signal processor is connected with the battery through the wire, the ignition signal processor is connected with the setting tool through the setting tool control line, the ignition signal processor is connected with the ignition control chip of the last stage of the perforating gun through the communication line, and the ignition signal processor and the data acquisition processor are connected with the depth calculation processor through the wire.

[0012] Preferably, the wellhead blowout prevention equipment comprises a crane, a blowout pipe and a blowout preventer, the blowout pipe is connected above the blowout preventer and is lifted by the crane,

[0013] Preferably, the wellbore comprises a vertical well section, a build-up section and a horizontal section which are connected in sequence, and the perforating pipe string is arranged in the wellbore.

[0014] Preferably, all components of the perforating pipe string are made of magnesium alloy.

[0015] Another technical scheme adopted by the present application is a cableless pumping horizontal well bridge plug perforating method, and the cableless pumping horizontal well bridge plug perforating device is used, and the method is implemented according to the following steps:

[0016] Step 1, the perforating pipe string is lifted into the inside of the blowout pipe by the crane;

[0017] Step 2, the blowout pipe is opened, and the perforating pipe string is conveyed in the wellbore;

[0018] Step 3, in the process of conveying the perforating pipe string, the data acquisition processor collects the casing collar data in real time and transmits the data to the depth calculation processor to calculate the real-time depth of the perforating pipe string in the wellbore;

[0019] Step 4, when the depth value matches the perforating section, the corresponding perforating section is completed;

[0020] Step 5, the perforating pipe string continues to convey to the well bottom, and when the depth value of the perforating pipe string matches the bridge plug setting position, the bridge plug is set and separated;

[0021] Step 6, the perforating pipe string is decomposed into flowable degradation under the action of the well fluid and is discharged to the ground along with the drilling fluid.

[0022] Preferably, step 1 is specifically as follows:

[0023] Step 1.1, close the blowout preventer, disassemble the upper and lower parts of the blowout pipe, and use the crane to lift the upper part of the blowout pipe, separate the upper part from the lower part and move away from the lower part;

[0024] Step 1.2, the crane lifts the perforating pipe string into the interior of the lower part of the blowout pipe, the perforating pipe string is seated on the blowout preventer gate, and the crane is separated from the perforating pipe string;

[0025] Step 1.3, the crane lifts the upper part of the blowout pipe and connects it with the lower part.

[0026] Preferably, step 2 is specifically:

[0027] Open the blowout pipe, convey the perforating pipe string in the wellbore, and convey the perforating pipe string in the vertical section by its own gravity. When the perforating pipe string passes through the build-up section, the wellhead pumps a certain amount of liquid into the interior of the wellbore, and the perforating pipe string is pumped to the horizontal section under the action of the liquid thrust.

[0028] Preferably, step 4 is specifically:

[0029] When the depth value matches the perforating section, the depth calculation processor sends a firing instruction to the firing signal processor, the firing signal processor sends a selected signal to the firing control chip closest to the control short-circuit perforating device through the signal communication line, and then transmits sequentially through the signal communication line until the farthest perforating device from the control short-circuit firing control chip. In the transmission process through the signal communication line, when the corresponding level of the firing control chip matches the selected signal address, the corresponding level of the firing control chip supplies power to the detonator through the detonator firing line, the detonator is initiated after the detonator is initiated, the detonator is initiated, and the perforating charge is initiated to complete the perforation of the corresponding section;

[0030] Preferably, step 5 is specifically:

[0031] After perforating, the perforating pipe string continues to be conveyed to the bottom of the well, and when the depth value of the perforating pipe string matches the setting position of the bridge plug, the depth calculation processor sends a bridge plug setting instruction to the firing signal processor, and the firing signal processor sends a starting signal to the setting tool through the setting tool control line. The setting tool completes the setting of the bridge plug, and the setting tool is separated from the bridge plug to complete the release.

[0032] The beneficial effects of the present application are:

[0033] The present application does not need to transport the perforating pipe string by cable, thus does not cause the problem of weak pump breakage caused by the mismatch between the cable lowering speed and the actual transport speed of the perforating pipe string, and the problem of high cost of operation personnel and the need to occupy a large number of perforating engineering vehicles for cable transport. The present application relies on the gravity of the perforating pipe string to transport the perforating pipe string to the build-up section in the vertical well section, then pumps liquid from the wellhead to realize the pumping of the perforating pipe string in the horizontal section, calculates the depth of the pipe string in real time to determine that the pipe string reaches the perforating section, controls the short circuit to send the selected firing signal, the perforators at each level are ignited and perforated in turn, and finally the bridge plug is set and released. Since the perforating pipe string is made of water-degradable material, the perforators do not need to be pulled out after perforation, and they will be degraded into flowable degradation substances after several days, and returned to the ground with the drilling fluid, thus realizing the low-cost and safe completion of the horizontal well setting bridge plug and multi-stage perforation completion operation. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of the cableless pumping horizontal well bridge plug perforating device of the present application;

[0035] Figure 2 is a schematic diagram of the internal structure of the perforating pipe string in the cableless pumping horizontal well bridge plug perforating device of the present application;

[0036] Figure 3 is a schematic diagram of the structure of the wellhead blowout preventer and the wellbore in the cableless pumping horizontal well bridge plug perforating device of the present application;

[0037] Figure 4 is a schematic diagram of the internal structure of the perforating pipe string in the cableless pumping horizontal well bridge plug perforating device of the present application;

[0038] Figure 5 is a schematic diagram of the connection of the upper part of the blowout preventer and the lower part of the blowout preventer in the embodiment 3 of the present application;

[0039] Figure 6 is a schematic diagram of the transport of the perforating pipe string in the vertical well section in the embodiment 3 of the present application;

[0040] Figure 7 is a schematic diagram of the perforation of the first-stage perforator in the embodiment 3 of the present application;

[0041] Figure 8 is a schematic diagram of the perforation of the second-stage perforator in the embodiment 3 of the present application;

[0042] Figure 9 is a schematic diagram of the perforation of the third-stage perforator in the embodiment 3 of the present application;

[0043] Figure 10 is a schematic diagram of the setting of the setting tool to complete the setting of the bridge plug in the embodiment 3 of the present application;

[0044] Figure 11 is a schematic diagram of the separation of the setting tool and the bridge plug in the embodiment 3 of the present application;

[0045] Figure 12 Schematic diagram of the flowable degradable material discharge in embodiment 3 of the present application.

[0046] In the figure: 1000, perforating string; 1100, fishing head; 1200, lifting ring; 1300, perforator; 1310, detonating cord; 1320, perforating bullet; 1330, detonator; 1340, detonator ignition line; 1350, ignition control chip; 1360, signal communication line; 1400, control short; 1410, signal communication line; 1420, battery; 1430, integrated control chip; 1431, ignition signal processor; 1432, data acquisition processor; 1433, depth calculation processor; 1440, setting tool control line; 1500, setting tool; 1600, bridge plug; 2000, wellhead blowout prevention equipment; 2100, hoist; 2200, blowout preventer pipe; 2210, lower part of blowout preventer pipe; 2220, upper part of blowout preventer pipe; 2300, blowout preventer; 2310, blowout preventer gate; 3000, wellbore; 3100, vertical section; 3200, build-up section; 3300, horizontal section, 1300a, first-stage perforator; 1300b, second-stage perforator; 1300c, third-stage perforator; DETAILED DESCRIPTION

[0047] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] Embodiment 1

[0049] The present application is a cableless pumping horizontal well bridge plug perforating device, which has the structure as shown in the figure, comprising a perforating string 1000, which comprises a fishing head 1100, a lifting ring 1200, at least one perforator 1300, a control short 1400, a setting tool 1500, and a bridge plug 1600 connected in sequence, as shown in the figure. Figure 1 Figure 2 Each perforator 1300 comprises a shell and a detonating cord 1310, and the shell of the perforator 1300 is provided with multiple perforating bullets 1320 and an ignition control chip 1350 in sequence from the lifting ring 1200 to the control short 1400, the detonating cord 1310 is wound on each perforating bullet 1320 in sequence, and a detonator 1330 is connected at the lowermost end of the perforating bullets 1320, the ignition line 1340 of the detonator 1330 is connected to the ignition control chip 1350, and the ignition control chips 1350 of the perforators 1300 are connected in sequence through the signal communication line 1360.

[0050] ​If the perforator 1300 is set as multiple stages, the plurality of perforators 1300 are sequentially connected in the front, that is, the plurality of perforators 1300 are sequentially connected in the front, the lower end of the fishing head 1100 is connected to the upper end of the shell of the first-stage perforator 1300, and the lowermost end of the shell of the last-stage perforator 1300 is connected to the control short 1400.

[0051] The control short 1400 includes a shell, the lowermost end of the shell of the last-stage perforator 1300 and the uppermost end of the setting tool 1500 are connected to the two ends of the shell of the control short 1400, the shell of the control short 1400 is provided with an integrated control chip 1430 and a battery 1420, the integrated control chip 1430 is connected to the ignition control chip 1350 of the last-stage perforator 1300 through the communication line 1410, the integrated control chip 1430 is also connected to the setting tool 1500 through the setting tool control line 1440, and the integrated control chip 1430 and the battery 1420 are connected through a wire.

[0052] The integrated control chip 1430 includes an ignition signal processor 1431, a data acquisition processor 1432, and a depth calculation processor 1433, the ignition signal processor 1431 is connected to the battery 1420 through a wire, the ignition signal processor 1431 is connected to the setting tool 1500 through the setting tool control line 1440, the ignition signal processor 1431 is connected to the ignition control chip 1350 of the last-stage perforator 1300 through the communication line 1410, and the ignition signal processor 1431 and the data acquisition processor 1432 are both connected to the depth calculation processor 1433 through wires.

[0053] As shown in FIG. 1, Figure 3 The wellhead blowout prevention equipment 2000 includes a crane 2100, a blowout pipe 2200, and a blowout preventer 2300, the blowout pipe 2200 is connected to the blowout preventer 2300 and is lifted by the crane 2100,

[0054] The wellbore 3000 includes a vertical section 3100, a build-up section 3200, and a horizontal section 3300 connected in sequence, and the perforating pipe string 1000 is in the wellbore 3000.

[0055] All components of the perforating pipe string 1000 are made of magnesium alloy, and the magnesium alloy material can gradually decompose into flowable degradation products 4000 in a liquid containing chloride ions.

[0056] In this embodiment, the data acquisition processor 1432 sends the real-time acquired casing collar data to the depth calculation processor 1433, the depth calculation processor 1433 calculates the real-time depth of the perforating pipe string in the wellbore 3000 in real time, when the depth value matches the perforating section, the depth calculation processor 1433 sends the ignition instruction to the ignition signal processor 1431, the ignition signal processor 1431 sends the selected signal through the signal communication line 1410, the selected signal is transmitted to the ignition control chip 1350 of the perforating gun 1300 farthest from the control short circuit 1400 after passing through the ignition control chip 1350 of the perforating gun 1300 closest to the control short circuit 1400 (the selected signal traverses the ignition control chip 1350 of each level of perforating gun 1300). After the ignition control chip 1350 matches the selected signal address, power is supplied to the detonator 1330 through the detonator ignition line 1340, the detonator 1330 initiates the detonation of the booster cord 1310, the booster cord 1310 initiates the perforating charge 1320 to complete the perforation.

[0057] Embodiment 2

[0058] The cableless pumping horizontal well bridge plug perforating method of the present application adopts the cableless pumping horizontal well bridge plug perforating device in embodiment 1, and is implemented according to the following steps:

[0059] Step 1, use the crane 2100 to hoist the perforating pipe string 1000 into the inside of the blowout pipe 2200; specifically:

[0060] Step 1.1, close the blowout preventer 2300, disassemble the upper and lower parts of the blowout pipe 2200, the crane hoists the upper part of the blowout pipe 2220, separates the upper part of the blowout pipe 2220 from the lower part of the blowout pipe 2210 and moves away from the lower part of the blowout pipe 2210;

[0061] Step 1.2, the crane 2100 hoists the perforating pipe string 1000 into the inside of the lower part of the blowout pipe 2210, the perforating pipe string 1000 is seated on the blowout preventer ram 2310, and the crane 2100 is separated from the perforating pipe string 1000;

[0062] Step 1.3, after the crane 2100 hoists the upper part of the blowout pipe 2220, the upper part of the blowout pipe 2220 is connected with the lower part of the blowout pipe 2210;

[0063] Step 2, open the blowout pipe 2200, and convey the perforating pipe string 1000 in the wellbore 3000; specifically: open the blowout pipe 2200, convey the perforating pipe string 1000 in the wellbore 3000, and convey the perforating pipe string 1000 in the straight well section 3100 by relying on its own gravity, when the perforating pipe string 1000 passes through the build-up section 3200, pump a certain amount of liquid into the inside of the wellbore 3000 at the wellhead, and convey the perforating pipe string 1000 towards the horizontal section 3300 under the action of liquid thrust pumping;

[0064] Step 3: During the transportation of the perforating string 1000, the data acquisition processor 1432 collects casing collar data in real time and transmits it to the depth calculation processor 1433 to calculate the real-time depth of the perforating string 1000 in the wellbore 3000;

[0065] Step 4: When the depth value matches the perforation section, the corresponding perforation section completes perforation; specifically:

[0066] When the depth value matches the perforation section, the depth calculation processor 1433 sends an ignition command to the ignition signal processor 1431. The ignition signal processor 1431 sends a selection signal to the ignition control chip 1350 of the first-level perforator 1300 closest to the control short circuit 1400 through the signal communication line 1410. The signal is then transmitted sequentially through the signal communication line 1360 until it reaches the ignition control chip 1350 of the perforator 1300 farthest from the control short circuit 1400. During the transmission process through the signal communication line 1360, when the ignition control chip 1350 of the corresponding level matches the address of the selection signal, the ignition control chip 1350 of the corresponding level supplies power to the detonator 1330 through the detonator ignition line 1340. After the detonator 1330 is detonated, the detonating cord 1310 is detonated, and the detonating cord 1310 detonates the perforating charge 1320 to complete the perforation of the corresponding section.

[0067] Step 5: The perforating string 1000 continues to be conveyed toward the bottom of the well. When the depth of the perforating string matches the bridge plug setting position, the bridge plug 1600 is set and separated. Specifically, after perforating is completed, the perforating string 1000 continues to be conveyed toward the bottom of the well. When the depth of the perforating string matches the bridge plug setting position, the depth calculation processor 1433 sends a bridge plug setting instruction to the ignition signal processor 1431. The ignition signal processor 1431 sends a start signal to the setting tool 1500 via the setting tool control line 1440. The setting tool 1500 completes the setting of the bridge plug 1600, and the setting tool 1500 is separated from the bridge plug 1600, completing the release.

[0068] In step 6, the perforating tubing string 1000 is decomposed into flowable degradation products 4000 under the action of the drilling fluid and is returned to the surface along with the drilling fluid.

[0069] Example 3

[0070] Based on Example 2, this embodiment adopts a three-stage perforator 1300, which is sequentially marked as the first-stage perforator 1300a, the second-stage perforator 1300b, and the third-stage perforator 1300c from the position close to the hoisting ring 1200 to the position close to the control short circuit 1400. The specific steps are as follows:

[0071] Step 1, close the blowout preventer 2300, disassemble the upper and lower parts of the blowout pipe 2200, and use the crane to lift the upper part of the blowout pipe 2220 and separate it from the lower part of the blowout pipe 2210.

[0072] As shown in Figure 4 Step 2: the crane 2100 lifts the perforating pipe string 1000 into the interior of the lower part of the blowout pipe 2210, the perforating pipe string 1000 is seated on the blowout preventer ram 2310, and the crane 2100 is separated from the perforating pipe string 1000.

[0073] As shown in Figure 5 Step 3: the crane 2100 lifts the upper part of the blowout pipe 2220 and connects it to the lower part of the blowout pipe 2210.

[0074] As shown in Figure 6 Step 4: open the blowout preventer 2300, and in the vertical section 3100, the perforating pipe string 1000 is conveyed to the bottom of the well under the action of gravity.

[0075] Step 5: when the perforating pipe string 1000 passes through the build-up section 3200, the wellhead pumps a certain amount of liquid into the wellbore, and the perforating pipe string 1000 is conveyed to the horizontal section 3300 under the action of liquid thrust pumping.

[0076] Step 6: during the conveying of the perforating pipe string 1000, the data acquisition processor 1432 is responsible for real-time acquisition of casing collar data, the depth calculation processor 1433 receives the collar data from the data acquisition processor 1432, and calculates the real-time depth of the perforating pipe string 1000 in the wellbore 3000.

[0077] Step 7: when the depth value matches the perforating section, the depth calculation processor 1433 sends a firing instruction to the ignition signal processor 1431, the ignition signal processor 1431 sends a selected signal through the signal communication line 1410, and the selected signal is transmitted to the ignition control chip 1350 of the first-stage perforating gun 1300a through the ignition control chip 1350 of the third-stage perforating gun 1300c (the selected signal traverses the ignition control chips 1350 of the perforating guns 1300).

[0078] As shown in Figure 7 Step 8: after the ignition control chip 1350 of the first-stage perforating gun 1300a matches the selected signal address, it supplies power to the detonator 1330 through the detonator ignition line 1340, the detonator 1330 initiates the detonating cord 1310, the detonating cord 1310 initiates the perforating charge 1320, and the perforating is completed.

[0079] Step 9: The perforating pipe string 1000 continues to be conveyed to the well bottom under the action of hydraulic pumping. When the depth value matches the second stage perforating section, the depth calculation processor 1433 sends a firing instruction to the firing signal processor 1431, and the firing signal processor 1431 sends a firing signal through the signal communication line 1410. The firing signal is transmitted to the firing control chip 1350 of the second stage perforating gun 1300b after passing through the firing control chip 1350 of the third stage perforating gun 1300c (the firing signal traverses the firing control chips 1350 of the remaining perforating guns 1300 without perforating).

[0080] As shown in Figure 8 Step 10: After the firing control chip 1350 of the second stage perforating gun 1300b matches the firing signal address, power is supplied to the detonator 1330 through the detonator firing line 1340. After the detonator 1330 is initiated, the detonating cord 1310 is detonated, and the perforating charge 1320 is initiated to complete perforation.

[0081] Step 11: The perforating pipe string 1000 continues to be conveyed to the well bottom under the action of hydraulic pumping. When the depth value matches the third stage perforating section, the depth calculation processor 1433 sends a firing instruction to the firing signal processor 1431, and the firing signal processor 1431 sends a firing signal through the signal communication line 1410. The firing signal is transmitted to the firing control chip 1350 of the third stage perforating gun 1300c.

[0082] As shown in Figure 9 Step 12: After the firing control chip 1350 of the third stage perforating gun 1300c matches the firing signal address, power is supplied to the detonator 1330 through the detonator firing line 1340. After the detonator 1330 is initiated, the detonating cord 1310 is detonated, and the perforating charge 1320 is initiated to complete perforation.

[0083] As shown in Figure 10 Step 13: The perforating pipe string 1000 continues to be conveyed to the well bottom under the action of hydraulic pumping. When the perforating pipe string depth value matches the bridge plug setting position, the depth calculation processor 1433 sends a bridge plug setting instruction to the firing signal processor 1431, and the firing signal processor 1431 sends a start signal to the setting tool 1500 through the setting tool control line 1440. The setting tool 1500 completes the setting of the bridge plug 1600, as shown in Figure 11 As shown in

[0084] As shown in Figure 12 Step 11: The perforating pipe string 1000 is decomposed into flowable degradation 4000 under the action of the well fluid, and the flowable degradation 4000 is returned to the ground with the drilling fluid.

[0085] The present application relies on the fact that the perforating pipe string is transported to the build-up section by its own gravity in the vertical section, and then pumped from the wellhead to realize the perforating pipe string pumping in the horizontal section. By real-time calculation of the pipe string depth, it is determined that the pipe string reaches the perforating section, and the selected firing signal is sent out by controlling the short circuit. The perforators are ignited and perforated in turn, and finally the bridge plug is set and released. Since the perforating pipe string is made of water-degradable material, it is not necessary to pull out the perforators after perforation. It will be degraded into flowable degradable material after several days, and returned to the ground with the drilling fluid, which provides a low-cost, efficient and safe bridge-shooting combined operation technology for the segmented multi-stage fracturing of unconventional oil and gas wells such as shale gas, tight gas and coal bed methane.

Claims

1. A cableless pumping horizontal well bridge plug perforating device, characterized in that, The application relates to a perforating string (1000) comprising a fishing head (1100), a lifting ring (1200), at least one level of perforators (1300), a control short circuit (1400), a setting tool (1500) and a bridge plug (1600) connected in sequence, wherein the perforators (1300) each comprise a shell and a detonating cord (1310), the shell of the perforators (1300) is sequentially provided with multiple perforating bullets (1320) and an ignition control chip (1350) from the lifting ring (1200) to the control short circuit (1400), the detonating cord (1310) is sequentially wound on the multiple perforating bullets (1320) and is connected with a detonator (1330) at the lowermost end, the ignition line (1340) of the detonator (1330) is connected with the ignition control chip (1350), and the ignition control chips (1350) of the perforators (1300) are sequentially connected in series through a signal communication line (1360).

2. The cableless pumped horizontal well bridge plug perforating device of claim 1, wherein, If the perforators (1300) are provided in multiple levels, the multiple perforators (1300) are sequentially connected in the first position, that is, the shells of the multiple perforators (1300) are sequentially connected in the first position, the lower end of the fishing head (1100) is connected with the upper end of the shell of the first level of perforators (1300), and the lowermost end of the shell of the last level of perforators (1300) is connected with the control short circuit (1400).

3. The cableless pumped horizontal well bridge plug perforating device of claim 2, wherein, The control short circuit (1400) comprises a shell, the lowermost end of the shell of the last level of perforators (1300) and the uppermost end of the setting tool (1500) are connected with the two ends of the shell of the control short circuit (1400) respectively, the shell of the control short circuit (1400) is provided with an integrated control chip (1430) and a battery (1420), the integrated control chip (1430) is connected with the ignition control chip (1350) of the last level of perforators (1300) through a communication line (1410), the integrated control chip (1430) is also connected with the setting tool (1500) through a setting tool control line (1440), and the integrated control chip (1430) is connected with the battery (1420) through a wire.

4. The cableless pumped horizontal well bridge plug perforating device of claim 3, wherein, The integrated control chip (1430) comprises an ignition signal processor (1431), a data acquisition processor (1432) and a depth calculation processor (1433), the ignition signal processor (1431) is connected with the battery (1420) through a wire, the ignition signal processor (1431) is connected with the setting tool (1500) through the setting tool control line (1440), the ignition signal processor (1431) is connected with the ignition control chip (1350) of the last level of perforators (1300) through the communication line (1410), and the ignition signal processor (1431) and the data acquisition processor (1432) are both connected with the depth calculation processor (1433) through wires.

5. The cableless pumped horizontal well bridge plug perforating device of claim 4, wherein, The wellhead blowout prevention equipment (2000) comprises a crane (2100), a blowout pipe (2200) and a blowout preventer (2300), wherein the blowout pipe (2200) is connected above the blowout preventer (2300) and is lifted by the crane (2100); the wellbore (3000) comprises a vertical section (3100), a build-up section (3200) and a horizontal section (3300) connected in sequence, and the perforating pipe string (1000) is arranged in the wellbore (3000).

6. The cableless pumped horizontal well bridge plug perforating device of claim 4, wherein, All components of the perforating pipe string (1000) are made of magnesium alloy.

7. A method of pumping a bridge plug in a horizontal well without a cable, characterized in that, The cable-free pumping horizontal well bridge plug perforating device is implemented according to the following steps. Step 1: the perforating pipe string (1000) is lifted into the blowout pipe (2200) by the crane (2100); Step 2: the blowout pipe (2200) is opened, and the perforating pipe string (1000) is conveyed in the wellbore (3000); Step 3: the casing collar data is collected in real time by the data acquisition processor (1432) and transmitted to the depth calculation processor (1433) to calculate the real-time depth of the perforating pipe string (1000) in the wellbore (3000); Step 4: when the depth value matches the perforating section, the corresponding perforating section is completed; Step 5: the perforating pipe string (1000) continues to be conveyed to the bottom of the well, and when the perforating pipe string depth value matches the bridge plug setting position, the bridge plug (1600) is set and separated; Step 6: the perforating pipe string (1000) is decomposed into flowable degradation products (4000) under the action of the well fluid and returned to the ground with the drilling fluid.

8. The cableless pumped horizontal well bridge plug perforating method of claim 7, wherein, The step 2 is specifically: Step 1.1: the blowout preventer (2300) is closed, the blowout pipe (2200) is disassembled into upper and lower parts, the crane lifts the upper blowout pipe (2220) and separates it from the lower blowout pipe (2210); Step 1.2: the crane (2100) lifts the perforating pipe string (1000) into the inside of the lower blowout pipe (2210), the perforating pipe string (1000) is placed on the blowout preventer flashboard, and the crane (2100) is separated from the perforating pipe string (1000); Step 1.3: after the crane (2100) lifts the upper blowout pipe (2220), the upper blowout pipe (2220) is connected with the lower blowout pipe (2210). The step 2 is specifically: The blowout pipe (2200) is opened, and the perforating pipe string (1000) is conveyed in the wellbore (3000); the perforating pipe string (1000) is conveyed by gravity in the vertical section (3100), and when the perforating pipe string (1000) passes through the build-up section (3200), the wellhead pumps a certain amount of liquid into the inside of the wellbore (3000), and the perforating pipe string (1000) is conveyed to the horizontal section (3300) under the action of the liquid thrust pumping.

9. The cableless pumped horizontal well bridge plug perforating method of claim 7, wherein, The step 4 is specifically: when the depth value matches the perforation segment, the depth calculation processor (1433) sends a firing instruction to the firing signal processor (1431), the firing signal processor (1431) sends a selected signal to the firing control chip (1350) closest to the control short circuit (1400) of the first perforator (1300) through the signal communication line (1410), and then transmits through the signal communication line (1360) until the firing control chip (1350) of the perforator (1300) farthest from the control short circuit (1400), in the transmission process through the signal communication line (1360), when the corresponding level of the firing control chip (1350) matches the selected signal address, the corresponding level of the firing control chip (1350) supplies power to the detonator (1330) through the detonator firing line (1340), the detonator (1330) is detonated to detonate the detonating cord (1310), the detonating cord (1310) detonates the perforating charge (1320) to complete the perforation of the corresponding segment.

10. The cableless pumped horizontal well bridge plug perforating method of claim 7, wherein, The step 5 is specifically: After the perforation is completed, the perforating string (1000) continues to be conveyed to the bottom of the well, when the depth value of the perforating string matches the bridge plug setting position, the depth calculation processor (1433) sends a bridge plug setting instruction to the firing signal processor (1431), the firing signal processor (1431) sends a starting signal to the setting tool (1500) through the setting tool control line (1440), the setting tool (1500) completes the setting of the bridge plug (1600), and the setting tool (1500) is separated from the bridge plug (1600) to complete the releasing.

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