Continuous tube cluster perforation intelligent ignition device and process

A technology of ignition device and oil pipe, which is applied in wellbore/well components, production fluid, earthwork drilling and other directions, can solve the problems of inability to meet field operation requirements, low operation time efficiency, complicated operation, etc., to improve the efficiency of perforating operation, The effect of improving the passing capacity and improving the conveying capacity

Inactive Publication Date: 2016-12-14
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing coiled tubing transmission perforation operation technology can only perforate two clusters at one time. There are two main forms of coiled tubing transmission perforation commonly used in the field: one is single cluster perforation in one run, and the other is two clusters perforation in one run. Cluster perforation, in order to complete multi-cluster perforation, coiled tubing needs to be tripped several times, the operation time is low, and it cannot meet the requirements of field operations. Completion under complex well conditions in unconventional oil and gas reservoirs requires clustered perforation with coiled tubing (one-time Downhole three clusters or more) technology puts forward an urgent demand
The coiled tubing through cable cluster perforation technology does not change the existing cluster perforator structure, connection and ignition method, but requires coiled tubing through cable devices and technology, and the operation is very complicated
In the prior art, there is no intelligent ignition process and technology that relies on coiled tubing to complete cluster perforation without wearing cables

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous tube cluster perforation intelligent ignition device and process
  • Continuous tube cluster perforation intelligent ignition device and process
  • Continuous tube cluster perforation intelligent ignition device and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An intelligent ignition device for coiled tubing cluster perforation, comprising sequentially connected coiled tubing 21, an automatic liquid inlet valve 22, an electronic detonator 23, a single-core flexible connection device 24 for perforation, and a clustered perforation string 25. The automatic liquid inlet valve 22 includes a body 9 on which a plurality of one-way valves for automatic liquid inlet are arranged; the perforating single-core flexible connection device 24 includes an upper joint assembly 13, an H card and a lower joint assembly 20, the upper joint assembly 13 and the lower joint assembly 20 are connected by an H card, the ends of the upper joint assembly 13 and the lower joint assembly 20 are provided with pins, and the two pins are connected by wires 14; the sub-shower The perforation string 25 includes a plurality of perforating guns connected in sequence, and the positive ignition diode 7 and the negative ignition diode 8 are connected alternately in...

Embodiment 2

[0041] This embodiment describes the present invention in conjunction with the accompanying drawings.

[0042] Such as figure 1 , the schematic diagram of the ultra-high temperature and ultra-high pressure cluster perforation principle: after all the pipe strings are assembled, they are lowered into the predetermined position in the well. The first perforating gun 1 is ignited with the positive ignition function of the straight-through ignition diode 6, and the large resistance detonator 5 and the perforating gun are ignited. After the operation was completed, the second cluster position was mentioned above, and the second perforating gun 2 was ignited with the negative ignition function of the straight-through ignition diode 6 . After the ignition is completed, the liquid in the well conducts the forward ignition diode 7, and positively ignites the third perforating gun 3 on the ground. After the ignition is completed, the liquid in the well conducts the negative ignition d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a continuous tube cluster perforation intelligent ignition device and a process. The continuous tube cluster perforation intelligent ignition device comprises a continuous tube, an automatic liquid inlet valve, an electronic detonator, a perforation single-core flexible connecting device and a cluster perforated string which are sequentially connected with one another. The automatic liquid inlet valve comprises a body, and a plurality of automatic liquid inlet check valves are arranged on the body; the perforation single-core flexible connecting device comprises an upper connector assembly, H clamps and a lower connector assembly, the upper connector assembly is connected with the lower connector assembly by the H clamps, and two pins are arranged at the ends of the upper connector assembly and the lower connector assembly and are connected with each other by an electric wire. The continuous tube cluster perforation intelligent ignition device and the process have the advantage that the continuous tube perforation operation efficiency can be improved, and the continuous tube cluster perforation intelligent ignition device and the process are favorable for protecting oil and gas reservoirs; pressure perforation operation is carried out, accordingly, the problem of oil and gas reservoir contamination risks during original drilling fluid perforation well completion can be solved, and delivery capacity of the cluster perforated and the handling capacity in response to complicated well conditions of unconventional oil and gas horizontal wells with shale gas, tight oil and gas and the like further can be improved.

Description

technical field [0001] The invention belongs to the field of exploration and development of unconventional oil and gas reservoirs such as shale gas and tight oil and gas, and specifically relates to a coiled tubing cluster perforation ignition device and technology under complex wellbore conditions of oil and gas wells such as shale gas and tight oil and gas. Background technique [0002] In recent years, the exploration and development of unconventional oil and gas resources, especially shale gas, has achieved good results. The state has successively established the Weiyuan-Changning shale gas demonstration zone in Sichuan, and the Fuling Jiaoshiba shale gas demonstration zone in Chongqing. In the demonstration area, the development and utilization of shale gas resources in the future has shown a good momentum. Cable-driven cluster perforation technology is currently the main technical means for perforating and completing shale gas horizontal wells. technical problems. Fo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/1185
CPCE21B43/1185E21B43/11852
Inventor 唐凯陈锋陈建波陈华彬欧跃强任国辉王海东李奔驰
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap