CN202325388U

CN202325388U - Well-completion type separate stratum fracturing packer

Info

Publication number: CN202325388U
Application number: CN2011204894429U
Authority: CN
Inventors: 朱玉军; 刘春雨; 张光恒; 霍春山
Original assignee: FUXIN CITY PETROLEUM TOOL FACTORY
Current assignee: FUXIN CITY PETROLEUM TOOL FACTORY
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2012-07-11
Anticipated expiration: 2021-12-01

Abstract

The utility model belongs to a downhole tool for oil and gas fields, and particularly relates to a well-completion type separate stratum fracturing packer. The packer is characterized in that an opening at the lower end of an upper joint (1) is in threaded connection with a central tube (3), a well-completion sliding sleeve (4) is arranged in the upper end of the central tube (3), the well-completion sliding sleeve (4) and the central tube (3) are connected in a positioning mode by using well-completion pin (16), a well-completion steel ball (15) is arranged at the upper port of the well-completion sliding sleeve (4), a connecting sleeve (5) is arranged below the well-completion sliding sleeve (4), the two ends of a fracturing pin (14) are respectively connected with a fracturing sliding sleeve (6) and the central tube (3) in a positioning mode, and a fracturing steel ball (15) is arranged at the upper port of the fracturing sliding sleeve (6). By using the well-completion type separate stratum fracturing packer disclosed by the utility model, the separate stratum fracturing of a gas well can be satisfied, and after the fracturing is completed, through carrying out a well-completion operation, sliding sleeves and steel balls of sand blowers at different levels can be fetched down to the downhole, so that an oil pipe is internally unimpeded, thereby achieving an effect of unimpeded gas production and solving a testing problem; meanwhile, the packer is unpacked in the process of well completion so as to solve the problem that the later pipe removal is difficult.

Description

Completion formula separate stratum fracfturing packer

Technical field

The utility model belongs to the oil gas field downhole tool, particularly a kind of completion formula separate stratum fracfturing packer.

Background technology

At present; Along with a large amount of gas well separate stratum fracfturing constructions, exposed two problems, the one, after separate stratum fracfturing is accomplished; Because steel ball is stayed in the oil pipe on the sliding sleeve of sandblasters at different levels; Because factors such as each stressor layer is different and some layer shakes out when exploitation have hindered the normal exploitation of some layer, obstructed causing can not be carried out the test of each layer in the oil pipe simultaneously; The 2nd, packer is not automatic deblocking after pressure break is accomplished, and in the time of need salvaging in the exploitation later stage, the sand card causes the overhaul accident easily.

Summary of the invention

The purpose of the utility model is to overcome above-mentioned technical deficiency, and a kind of gas well separate stratum fracfturing of satisfying is provided, and makes in the oil pipe unimpededly, stops the completion formula separate stratum fracfturing packer of overhaul accident.

The technical scheme that the utility model technical solution problem adopts is: completion formula separate stratum fracfturing packer comprises top connection, lower contact, central tube, upper press ring, pin, piston are pinned, set to pressure ring, completion steel ball, pressure break steel ball, pressure break down; Be characterized in that the top connection lower end drives the lobe central tube that is threaded; In the completion sliding sleeve centering pipe upper end; Be located by connecting with completion pin between completion sliding sleeve and the central tube, the completion steel ball places the port of completion sliding sleeve, adapter sleeve place the completion sliding sleeve below; Pressure break pin two ends be located by connecting respectively pressure break sliding sleeve and central tube, the pressure break steel ball places the port of pressure break sliding sleeve.

The beneficial effect of the utility model is: completion formula separate stratum fracfturing packer can satisfy the gas well separate stratum fracfturing; Pass through completion operations after the pressure break; Can hit the sliding sleeve and the steel ball of sandblasters at different levels down shaft bottom, make in the oil pipe unimpededly, realize without hindrance gas production and solve test problem; While, with the packer deblocking, the solution later stage was played the pipe difficult problem when completion.

Description of drawings

Specify with embodiment below in conjunction with accompanying drawing.

Fig. 1 is a completion formula separate stratum fracfturing packer construction sectional view.

Among the figure, the 1-top connection; The 2-upper press ring; The 3-central tube; 4-completion sliding sleeve; The 5-adapter sleeve; 6-pressure break sliding sleeve; The 7-packing element; Pressure ring under the 8-; The 9-locking mechanism; The 10-piston; The 11-lower contact; 12-sets pin; 13-deblocking pin; 14-pressure break pin; 15-pressure break steel ball; 16-completion pin; 17-completion steel ball.

The specific embodiment

Embodiment, with reference to accompanying drawing 1, completion formula separate stratum fracfturing packer top connection 1 external screw thread connects upper press ring 2, the inner central tube 3 that connects, central tube 3 lower ends connect lower contact 11.Lower contact 11 upper ends connect piston 10 by setting pin 12, and piston 10 connects pressure ring 8 down, and the middle locking mechanism 9 that is located by connecting on the central tube 3 by deblocking pin 13 of installing is installed packing element 7 between upper press ring 2 and the following pressure ring 8.The lobe central tube 3 that is threaded is driven in top connection 1 lower end, in the completion sliding sleeve 4 centering pipes 3, is located by connecting with completion pin 16 between completion sliding sleeve 4 and the central tube 3, and completion steel ball 17 is inserted the port of completion sliding sleeve 4.Adapter sleeve 5 place completion sliding sleeve 4 below, pressure break pin 14 two ends be located by connecting respectively pressure break sliding sleeve 4 and central tube 3, pressure break steel ball 15 places the port of pressure break sliding sleeve 6.

The operating principle of completion formula separate stratum fracfturing packer is: when setting; Water filling is suppressed in the oil pipe, affacts on the piston 10 through adapter sleeve 5 base apertures and central tube 3 base apertures, promotes piston 10 and cuts off that to set pin 12 afterwards up; Compression packing element 7 expands and seals, and lock is accomplished locking with following pressure ring 8 simultaneously; Pressure break when upper end layer, in oil pipe, throw pressure break steel ball 15, fall on pressure break sliding sleeve 6 port; Suppress in the central tube 3, pressure break sliding sleeve 6 is cut off and is taken that to split pin 14 backs up by force, and upper end outside shoulder hangs on the adapter sleeve 5 inner elastomeric shoulders; The pressure break passage is opened; With adapter sleeve 5 base apertures shutoff, can be during pressure break through elasticity spring place, adapter sleeve 5 middle part to piston 10 lower end supplementary pressures, during the balance pressure break to the used load of deblocking pin 13; During completion, in oil pipe, throw completion steel ball 17, drop down onto on the port of completion sliding sleeve 4; Suppress in the oil pipe, it is descending that completion sliding sleeve 4 is cut off completion pin 16 backs, removes the support that top connection 1 is connected with central tube 3 elasticity; Central tube 3, adapter sleeve 5 and descending with the lower part, packing element 7 reclaims the packer deblocking; Completion sliding sleeve 4 is descending more afterwards, removes the support that adapter sleeve 5 is connected with central tube 3 elasticity, and it is descending to drive adapter sleeve 5; Open after adapter sleeve 5 middle part elasticity springs partly drop down onto central tube 3 inner reamings place, pressure break sliding sleeve 6 drops down onto the shaft bottom with pressure break steel ball 15 and completion sliding sleeve 4 and completion steel ball 17 through adapter sleeve 5 lower ends, realizes without hindrance.

Claims

1. completion formula separate stratum fracfturing packer; Comprise top connection (1), lower contact (11), central tube (3), upper press ring (2), following pressure ring (8), completion steel ball (17), pressure break steel ball (15), pressure break pin (14), set pin (12), piston (10); It is characterized in that top connection (1) lower end drives the lobe central tube (3) that is threaded; In completion sliding sleeve (4) centering pipe (3) upper end; Be located by connecting with completion pin (16) between completion sliding sleeve (4) and the central tube (3), completion steel ball (17) places the port of completion sliding sleeve (4), adapter sleeve (5) place completion sliding sleeve (4) below; Pressure break pin (14) two ends be located by connecting respectively pressure break sliding sleeve (6) and central tube (3), pressure break steel ball (15) places the port of pressure break sliding sleeve (6).