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CN-121701153-B - Delay explosion propagation device for multistage perforation initiation

CN121701153BCN 121701153 BCN121701153 BCN 121701153BCN-121701153-B

Abstract

The invention discloses a delay explosion propagation device for multistage perforation initiation, which relates to the technical field of multistage perforation and aims to solve the technical problem that the existing delay explosion propagation device is insufficient in safety isolation in a delay waiting stage. The invention realizes reliable separation and connection of the impact path of the firing pin through gathering and unfolding of the combined blocks in the separation mechanism, so that the firing pin can directly impact the fire cap to complete detonation only when the combined blocks are unfolded, and the impact path is separated from detonation when the combined blocks are gathered, thereby providing an actively controllable mechanical safety separation means and solving the technical problems of advanced detonation and insufficient safety caused by accidental impact of the firing pin on the fire cap due to false triggering or pressure fluctuation in the delay waiting period of the traditional delay explosion-propagation device.

Inventors

  • ZHANG NANNAN
  • YU DEMING
  • LI CHANGQING

Assignees

  • 大庆金祥寓科技有限公司

Dates

Publication Date
20260505
Application Date
20260213

Claims (10)

  1. 1. The delay explosion propagation device for multistage perforation initiation comprises a gun body (1), a pressure sensor (11), a perforating bullet system (2), an initiation system (3) and an isolation mechanism (4), and is characterized in that the initiation system (3) comprises an inner cylinder (31) sleeved in the gun body (1), a firing pin (33) sleeved in the inner cylinder (31) and provided with hydraulic drive, and a fire cap (34) arranged at the bottom of the inner cylinder (31); The isolation mechanism (4) comprises a lower die static module (41) and an upper die dynamic module (42), and the upper die dynamic module (42) is positioned right above the lower die static module (41) and can move upwards or downwards; the lower die static module (41) comprises an I-shaped cylinder (4121) sleeved in the inner cylinder (31); the upper surface of the I-shaped tube (4121) is fixedly connected with a plurality of support plates (413) in an annular array, and radial physical partition is formed between the support plates (413) along the thickness direction of the I-shaped tube (4121); The upper surface of each support plate (413) is slidably provided with an arc-shaped sliding block (415), and the arc-shaped sliding blocks (415) have an elastic reset function; the inner wall of each arc-shaped sliding block (415) is slidably matched with a combined block (416), and the combined blocks (416) have downward elastic movement trend; the end part of the combined block (416) is clamped on a physical partition formed by the support plate (413); when the arc-shaped sliding blocks (415) move, the corresponding combined blocks (416) can be driven to gather or spread; when the plurality of combined blocks (416) are gathered, the upper surfaces of the combined blocks form a circular taper hole together, and the shape of the circular taper hole is matched with the shape of the striking end of the firing pin (33); When the plurality of combined blocks (416) are gathered, the striker (33) is hydraulically driven to move downwards, the striking end of the striker (33) is inserted into the circular taper hole, the striking path of the striker (33) is blocked, and when the upper die module (42) moves upwards, the arc-shaped sliding block (415) is pushed to slide, so that the combined blocks (416) are unfolded, the circular taper hole is relieved, and the striker (33) strikes on the fire cap (34).
  2. 2. The delay explosion propagation device for multistage perforation initiation according to claim 1, wherein the initiation system (3) further comprises a hydraulic module (32), the hydraulic module (32) is sleeved inside the inner cylinder (31), and the firing pin (33) is installed at the output end of the hydraulic module (32).
  3. 3. The delay explosion propagation device for multistage perforation initiation according to claim 2, wherein the lower die static module (41) further comprises two vertical coaxial annular frames (411), the annular frames (411) are sleeved inside the inner cylinder (31), the two annular frames (411) are fixedly connected through a plurality of limiting rods (4111), a static triangular plate (412) is sleeved inside one of the annular frames (411), and the I-shaped cylinder (4121) is installed at the center position of the static triangular plate (412).
  4. 4. A delayed detonation transfer device for multistage perforation detonation as claimed in claim 3, wherein a waist-shaped chute (414) is formed on the upper surface of each support plate (413) along the plate thickness direction, and the waist-shaped chute (414) penetrates through the corresponding support plate (413) and a lower static triangle (412).
  5. 5. The delay explosion propagation device for multistage perforation initiation according to claim 4, wherein a driving rod (4151) is fixedly connected to the bottom of each arc-shaped sliding block (415), the driving rod (4151) penetrates through a static triangle (412) from a waist-shaped sliding groove (414), sliding rails (4152) are symmetrically arranged on the inner wall of each arc-shaped sliding block (415), and a first spring (4153) is fixedly connected to the inner wall of the top of each sliding rail (4152).
  6. 6. The delayed detonation transfer device of claim 5, wherein the slider on the combining block (416) is slidably fitted inside the sliding rail (4152), and the slider on the combining block (416) is elastically connected with the first spring (4153).
  7. 7. The delay explosion propagation device for multistage perforation initiation according to claim 6, wherein each support plate (413) is sleeved with a hollow mounting column (417), the end of the hollow mounting column (417) penetrates through the static triangle (412), an electromagnet module (418) is arranged at the end of each hollow mounting column (417), the driving rod (4151) is elastically connected with the hollow mounting column (417) through a tension spring (419), and the tension spring (419) is located between the static triangle (412) and the support plate (413).
  8. 8. The delay explosion propagation device for multistage perforation initiation according to claim 7, wherein the upper die moving module (42) comprises a moving triangle (421), the moving triangle (421) is slidably sleeved on a plurality of limiting rods (4111), a second spring (422) is sleeved on the surface of each limiting rod (4111), the second spring (422) is elastically connected with one of the annular frames (411), the bottom of the moving triangle (421) is fixedly connected with a permanent magnet module (423) in an annular array, and the permanent magnet module (423) corresponds to the electromagnet module (418) in position.
  9. 9. The delay explosion propagation device for multistage perforation initiation according to claim 8, wherein the bottom of the movable triangular plate (421) is fixedly connected with a driving plate (424) in an annular array, the driving plates (424) correspond to the arc-shaped sliding blocks (415), an inclined surface (4241) is arranged on one side of each driving plate (424), the arc-shaped sliding blocks (415) are in sliding contact with the inclined surface (4241), and a connecting hole (4242) is formed on one side of each driving plate (424).
  10. 10. The multistage perforation initiation delay explosion propagation device according to claim 9, wherein a movable ring (425) with a supporting rod is sleeved on the side surface of the I-shaped cylinder (4121) in a sliding mode, a plurality of jacking blocks (4251) are fixedly connected to the upper surface of the movable ring (425) in an annular array, a plurality of through holes (426) are formed in the upper surface of the I-shaped cylinder (4121) in an annular array, the jacking blocks (4251) are inserted into the through holes (426) and are in movable contact with the lower surface of the combined block (416), and a driving frame (427) is sleeved in each connecting hole (4242) in a sliding mode; When the driving plate (424) moves upwards, the inner wall at the bottom of the connecting hole (4242) is contacted with the inner wall at the top of the driving frame (427), the driving plate (424) drives the driving frames (427) to move upwards, one side of each driving frame (427) is fixedly connected with a bending rod (428), the end part of each bending rod (428) is sleeved on the surface of a supporting rod on the movable ring (425), and the end part of each bending rod (428) and the movable ring (425) form a jacking fit relationship.

Description

Delay explosion propagation device for multistage perforation initiation Technical Field The invention relates to the technical field of multistage perforation, in particular to a delay explosion propagation device for multistage perforation initiation. Background At present, the key problem of the delay explosion propagation device for multistage perforation initiation is how to ensure that in a complex and severe underground environment, the accurate and reliable delay control can be realized, and the absolute safety of operation can be ensured. In the delay waiting stage of multistage perforating operation, the prior art has the outstanding problem of insufficient safety and reliability, the traditional explosion-propagating device often depends on electronic delay or single hydraulic control, and lacks an effective physical isolation mechanism, when underground pressure is abnormally fluctuated, a sensor is misjudged or a system is interfered, a firing pin can be wrongly operated at unexpected time to directly strike a fire cap, so that a perforating bullet is detonated in advance, the detonation time sequence can be disturbed, the failure of the stage of operation is caused, the gun clamping and the pipe column damage and even well control risks can be caused, and the safety and the success rate of the operation are seriously restricted. The conventional device has obvious limitations in the aspects of accurate control and response speed of detonation time sequence, is difficult to realize delay control with high precision and high stability by a scheme relying on pure hydraulic or electronic delay in a complex and changeable underground pressure environment, is easy to cause delay time drift or asynchronous detonation, and meanwhile, has longer response delay from receiving detonation signals to finishing mechanical actions, thereby influencing the overall efficiency and effect of multistage perforation operation. In view of the above, we propose a delay explosion propagation device for multistage perforation initiation. Disclosure of Invention The invention aims to provide a delay explosion propagation device for multistage perforation initiation, which aims to solve the technical problem that the existing delay explosion propagation device is insufficient in safety isolation in a delay waiting stage. In order to solve the technical problems, the invention provides the technical scheme that the delay explosion propagation device for multistage perforation initiation comprises a gun body, a pressure sensor, a perforation bullet system, an initiation system and an isolation mechanism, wherein the initiation system comprises an inner cylinder sleeved in the gun body, a firing pin sleeved in the inner cylinder and provided with hydraulic drive, and a fire cap arranged at the bottom of the inner cylinder; The isolation mechanism comprises a lower die static module and an upper die dynamic module, and the upper die dynamic module is positioned right above the lower die static module and can move upwards or downwards; the lower die static module comprises an I-shaped cylinder sleeved in the inner cylinder; the upper surface of the I-shaped cylinder is fixedly connected with a plurality of support plates in an annular array, and radial solid partition is formed between the support plates along the I-shaped cylinder in the plate thickness direction of the support plates; the upper surface of each support plate is slidably matched with an arc-shaped sliding block, and the arc-shaped sliding blocks have an elastic reset function; The inner wall of each arc-shaped sliding block is slidably matched with a combined block, and the combined blocks have downward elastic movement trend; The end part of the combined block is clamped on a solid partition formed by the support plate; when the arc-shaped sliding blocks move, the corresponding combined blocks can be driven to gather or spread; When a plurality of combined blocks are gathered, the upper surfaces of the combined blocks form a circular taper hole together, and the shape of the circular taper hole is matched with the shape of the striking end of the firing pin; When the combined blocks are gathered, and the striker is hydraulically driven to move downwards, the striking end of the striker is inserted into the circular taper hole, and the striking path of the striker is blocked; when the upper mould module moves upwards, the arc-shaped sliding block is pushed to slide, so that the combined block is unfolded, the circular taper hole is released, and the firing pin impacts on the fire cap, the invention realizes reliable separation and connection of the impact path of the firing pin through gathering and unfolding of the combined block in the separation mechanism, so that the firing pin can directly impact the fire cap to complete detonation only when the combined block is unfolded, the impact path is blocked and can not be detonated when the combined blocks are