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High temperature and high pressure step-by-step setting and unsealing controllable packer

A high temperature and high pressure, packer technology, used in sealing/packing, drill pipe, casing, etc., can solve the problems of reduced sealing performance of the rubber cylinder, poor sealing of the packer, and inability to carry out measures, so as to reduce the time Cost, high impact strength, and the effect of reducing construction risks

Active Publication Date: 2019-01-08
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the mechanical layered fracturing technology has become increasingly mature, and has achieved good results in the development of low-permeability oil and gas resources. During on-site fracturing construction, especially in high-temperature and high-pressure wells, the packer is repeatedly set and unsealed, and the sealing performance of the rubber cartridge is reduced, resulting in poor sealing of the packer; after the fracturing operation, the packer does not unseal, Sand stuck, the pipe string is difficult to pull out, resulting in the inability to carry out the later measures, which restricts the further development of this technology; therefore, it is urgent to provide a stable performance, reasonable structure, adaptable to high temperature and high pressure environment, reliable setting and unsealing, and recovery success rate High oil and gas well fracturing packer

Method used

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  • High temperature and high pressure step-by-step setting and unsealing controllable packer
  • High temperature and high pressure step-by-step setting and unsealing controllable packer
  • High temperature and high pressure step-by-step setting and unsealing controllable packer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Such as Figure 1-9 As shown, after the controllable packer of this embodiment is used in a fracturing string, a high-temperature and high-pressure multi-stage fracturing string is formed, and the fracturing string includes several pairs of upper and lower sets and matching The controllable packer and sand blaster used, the fracturing string is connected in sequence from bottom to top with bottom valve A, packer B, and several pairs of controllable packers and sand blasters used together , sand control hydraulic anchor G, hydraulic safety joint H, the above-mentioned tools are connected by oil pipe I;

[0071]The controllable packer is provided with an inner sliding sleeve assembly 4 that can slide down relative to the main body of the controllable packer, and the inner sliding sleeve assembly 4 is fixedly connected to the main body of the controllable packer by scissors 46, An openable liquid inlet is provided between the inner sliding sleeve assembly 4 and the main b...

Embodiment 2

[0083] Such as Figure 1-9 As shown, after the controllable packer of this embodiment is used in a fracturing string, a high-temperature and high-pressure multi-stage fracturing string is formed, and the fracturing string includes several pairs of upper and lower sets and matching The controllable packer and sand blaster used, the fracturing string is connected in sequence from bottom to top with bottom valve A, packer B, and several pairs of controllable packers and sand blasters used together , sand control hydraulic anchor G, hydraulic safety joint H, the above-mentioned tools are connected by oil pipe I;

[0084] The controllable packer includes an upper joint 1, a rubber cartridge assembly 2, a contact control sleeve assembly 3, an inner sliding sleeve assembly 4 and a lower joint 5;

[0085] The upper joint 1 is sealed and fixed on the upper end of the central tube 6;

[0086] The rubber cartridge assembly 2 is sealed and sleeved on the periphery of the central pipe 6,...

Embodiment 3

[0112] Such as Figure 1-9 As shown, after the controllable packer of this embodiment is used in a fracturing string, a high-temperature and high-pressure multi-stage fracturing string is formed, and the fracturing string includes several pairs of upper and lower sets and matching The controllable packer and sand blaster used, the fracturing string is connected in sequence from bottom to top with bottom valve A, packer B, and several pairs of controllable packers and sand blasters used together , sand control hydraulic anchor G, hydraulic safety joint H, the above-mentioned tools are connected by oil pipe I;

[0113] The controllable packer includes an upper joint 1, a rubber cartridge assembly 2, a contact control sleeve assembly 3, an inner sliding sleeve assembly 4 and a lower joint 5;

[0114] Wherein, the upper joint 1 is sealed and fixed on the upper end of the central tube 6;

[0115] Further, the upper joint 1 is also provided with an adjustment ring 11, the lower en...

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Abstract

The invention provides a high-temperature high-pressure stepwise blocking and deblocking controllable packer. The controllable packer is used for a fracturing string in the fracturing construction process, and the controllable packers and sand blowers which are matched for use and correspond to target construction positions can be turned on by one time of ball throwing during fracturing construction, so that the fracturing construction technique is simpler and more convenient; and stepwise blocking of the packer in the fracturing construction positions, unblocking of the packers in the non-construction positions and stepwise deblocking of the packers in the constructed positions can be achieved, and the leakproofness of each stage of the packers can be effectively detected. The number of times of blocking and pressure bearing time of the controllable packer are effectively reduced, the sealing efficiency of the controllable packer is improved, the problems that a rubber sleeve is damaged and the leakproofness is reduced due to the fact that the number of times of blocking is large and the pressure bearing time is too long are avoided, and the service life of the controllable packer is better prolonged.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure step-by-step setting and unsealing controllable packer, which is mainly used for staged fracturing construction of high-temperature and high-pressure oil and gas wells, and belongs to a construction tool for well completion operations. Background technique [0002] In recent years, mechanical layered fracturing technology has become more and more mature, and has achieved good results in the development of low-permeability oil and gas resources. Packer mechanical layered fracturing technology has become the main technology to improve single well production in oil and gas fields. During on-site fracturing construction, especially in high-temperature and high-pressure wells, the packer is repeatedly set and unsealed, and the sealing performance of the rubber cartridge is reduced, resulting in poor sealing of the packer; Sand stuck, the pipe string is difficult to pull out, resulting in the fail...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127E21B34/14E21B17/00E21B43/26
CPCE21B17/00E21B33/127E21B34/14E21B43/26
Inventor 程智远詹鸿运刘志斌张鹏任正军骆劲羽冯强郭鸣韩永亮崔振锚
Owner BC P INC CHINA NAT PETROLEUM CORP