CN203321475U

CN203321475U - Cluster-sliding-sleeve fracturing tubular column of oilfield horizontal well

Info

Publication number: CN203321475U
Application number: CN2013203191139U
Authority: CN
Inventors: 王峰; 霍春林; 刘长宇; 杨富军; 张应安; 许建国; 叶勤友; 王鸿伟; 佘国锋; 李福文
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2013-06-05
Filing date: 2013-06-05
Publication date: 2013-12-04
Anticipated expiration: 2023-06-05

Abstract

A cluster-sliding-sleeve fracturing tubular column of an oilfield horizontal well is characterized in that safe connectors (1), open-hole packers (2), fracturing sliding sleeves (3), disjoined packers (4) and constant-pressure ball seats (5) are sequentially connected through sleeves. The cluster-sliding-sleeve fracturing tubular column is applied to cluster fracturing of the horizontal well, a sleeve column can serve as a working tubular column, and step-by-step throwing open type fracturing sliding sleeves (2) are adopted, so that operating processes are simplified, liquid-flow friction in the well is reduced, and 10-15 levels of cluster-sliding-sleeve fracturing by one-time construction of the tubular column can be realized.

Description

Oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string

Technical field: the utility model relates to a kind of oil extraction in oil field tubing string, especially for a kind of oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string of horizontal well production.

Background technology: before the utility model, the pressure break that each oilfield horizontal well carries out after the sub-clustering perforation adopts drawing type or mechanical type sub-clustering fracturing string more, because this tubing string is to adopt tubing string as work string, and in work progress, need repeatedly to rise, tripping operation, not only complicated operation, down-hole fluid flow frictional resistance are large, have also limited the progression of sub-clustering pressure break.

Summary of the invention: the purpose of this utility model is: for horizontal well sub-clustering pressure break provides a kind of oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string, because this tubing string is to using the long string post as work string, and adopt pitching opening type fracturing sliding bush step by step, thereby simplified operation sequence, reduced the down-hole fluid flow frictional resistance, improved the possibility that increases sub-clustering pressure break progression.

The purpose of this utility model realizes by following measures: a kind of oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string, comprise safety joint, open hole packer, fracturing sliding bush, disconnection packer, level pressure ball seat, it is characterized in that safety joint, open hole packer, fracturing sliding bush, disconnection packer, level pressure ball seat are connected in turn by sleeve pipe.

The purpose of this utility model can also realize by following measures: in oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string, can consist of multistage fracturing sliding sleeve, disconnection packer.

The utility model is for staged fracturing of horizontal well, can the long string post as work string, and adopt pitching opening type fracturing sliding bush step by step, thereby simplified operation sequence, reduce the down-hole fluid flow frictional resistance, and can realize that an operating tool string completes 10-15 level sub-clustering sliding sleeve fracturing.

Accompanying drawing explanation: the schematic diagram that Fig. 1 is oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string.

The specific embodiment: oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string, comprise safety joint 1, open hole packer 2, fracturing sliding bush 3, disconnection packer 4, level pressure ball seat 5, its safety joint 1, open hole packer 2, fracturing sliding bush 3, disconnection packer 4, level pressure ball seat 5 are connected in turn by sleeve pipe; The sub-clustering pressure break combination wherein consisted of fracturing sliding bush 3, disconnection packer 4 is should be 10-15 level relative to stratum 6.

The specific embodiment and the principle of oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string are:

1, by design pipe string structural order fracturing tubing string (see figure 1), the magnetic orientation degree of depth is checked, the through wash well;

2, the well head fracturing device is installed, surface line circulation, configuration fracturing fluid, carry out the fracturing device pressure testing;

3, make whole packers envelope that rises from pressurization in oil pipe, pitching improves pressure disengagement safety joint 1 again, then trip out the top oil pipe, carry out step by step the casing fracturings such as pump prepad fluid, pump load fluid, pump displacement fluid, every one-level of constructing is all to realize the unlatching of fracturing sliding bush 3 at the corresponding levels by delivering the lightweight ball;

4, the closing well open flow returns row, returns continuously in time the discharge fracturing fluid construction that fulfils assignment after stop-spraying.

Claims

1. an oilfield horizontal well sub-clustering sliding sleeve fracturing tubing string, comprise safety joint, open hole packer, fracturing sliding bush, disconnection packer, level pressure ball seat, it is characterized in that: safety joint, open hole packer, fracturing sliding bush, disconnection packer, level pressure ball seat are connected in turn by sleeve pipe.