CN2869300Y - Packer for horizontal well side drilling and horizontal well operation - Google Patents

Abstract

The utility model relates to a packer used for the operation of horizontal and sidetrack horizontal wells, comprising a upper connector1, a hydraulic cylinder2, a pistion3, a stop ring4, a rubber-casing cap5, a long rubber-casing6, a spacer ring7, a short rubber tube8, a central tube9, a tapered cover10, an O-ring11, a cone12, a slip13, a slip spring14, a centralizing body15, a centralizing block16, a leaf spring17, T-hook18 and a backing-up screw19, wherein the upper connector1 and low connector20 are mounted on the up and low ends of the central tube9; the hydraulic cylinder2, the pistion3, the stop ring4, the rubber-casing cap5, the long rubber-casing6, the spacer ring7, the short rubber tube8, the tapered cover10, the cone12, the slip13, the centralizing body15, and the T-hook18 are fit over the outside of the central tube9 top down in turn; the centralizing block16 is fixed on the outside of the centralizing body15, in which the leaf spring17 is provided; the T-hook is fastened on the downside of the centralizing body15 through the backing-up screw19; and the slip spring14 is fixed on the bottom of the slip13. The packer can realize two times of seating sealing to ensure the tightness of the packer and is used for solving the problem of bad seating sealing performance during operations of water shutoff and fracturing of horizontal and sidetrack horizontal wells and keeping independence of the filled fluid from seating sealing and circulating without interference.

Description

A kind of horizontal well sidetrack horizontal well operation packer

Technical field:

The utility model relates to a kind of kit that is used for horizontal well, sidetrack horizontal well water blockoff, fracturing work.

Background technology:

Along with the development of the continuity of oil field development time and horizontal well, sidetrack horizontal well oil recovery technique, in-situ horizontal well, sidetrack horizontal well well a few days become to increasing, and workover treatment technology and supporting downhole tool more and more cause people's attention.Yet, usually the conventional packer that uses during workover rig service to oil well at all can not the adaptation level well, the requirement of sidetrack horizontal well, because the friction effect of casing wall and the bending of working string deep camber, the weight of tubing string can not act on the packer preferably, causes packer not set or poorly sealed.Conventional inflatable packer though can set preferably in horizontal well, sidetrack horizontal well, can not be realized sealing preceding circulation fluid injection operation, can not satisfy the needs of job execution.

Summary of the invention:

The purpose of this utility model is to provide a kind of horizontal well sidetrack horizontal well operation packer that goes for horizontal well, sidetrack horizontal well water blockoff, fracturing work construction and can guarantee to set good seal.

The utility model is to realize like this.This kind packer is by upper and lower joint, hydraulic cylinder, piston, baffle ring, rubber cylinder pressing cap, long packing element type, spacer ring, short rubber cylinder, central tube, awl lid, " 0 " shape circle, the cone slips, slips spring, centralizer body, wiper block, spring leaf, " fourth " shape hook, backing-up screw are formed, and the central tube upper and lower end has top connection and lower contact with the screw thread tipping respectively; The central tube outside is the capable hydraulic cylinder of suit, piston, baffle ring, rubber cylinder pressing cap, long packing element type, spacer ring, short rubber cylinder, awl lid, cone, slips, centralizer body and " fourth " shape hook successively from top to bottom; The centralizer body outside is provided with wiper block, is provided with spring leaf between tool, and " fourth " shape hook is fastened on the centralizer body bottom with backing-up screw, and the slips bottom is provided with the slips spring, and top connection, hydraulic cylinder, piston, rubber cylinder pressing cap, awl cover and be respectively equipped with round section joint ring.When horizontal well, sidetrack horizontal well water blockoff or pressing crack construction, tubing string is lowered to the desired setting position, carries out operations such as circulation well cleanup, kill-job, fluid injection as required, packer can not set, and does not also influence setting of packer; When the needs set packer, according to the seating sealing height upper lifting pipe post that calculates, just changeing 3～5 circles, slowly transfer tubing string; Wiper block is under the effect of bow type spring tension, produce friction with casing wall, move along the track groove, straight pin moves to bottom dead centre from top dead-centre in the lower contact, it is up to promote the slips assembly, and slips is strutted by cone, and the card jail is on casing wall, be compressed for the first time at tubing string effect lower rubber cylinder, it is big that the packing element diameter becomes; When suppressing, hydraulic drive descent of piston in the oil pipe promotes rubber cylinder pressing cap and compresses packing element for the second time, makes the packing element diameter further become big, thereby guarantees the sealing of packer.The upper lifting pipe post gets final product after only needing pressure release during deblocking.

The utility model is given full play to the advantage of machinery and hydraulic packing, can realize setting for twice, guarantee the sealing of packer, set problems such as bad, poorly sealed when utilizing it can solve horizontal well, sidetrack horizontal well water blockoff, fracturing work, and can guarantee to set and independence that the fluid injection that circulates is independent of each other, restricts.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

As shown in the figure, the utility model by top connection 1, hydraulic cylinder 2, piston 3, baffle ring 4, rubber cylinder pressing cap 5, long packing element type 6, spacer ring 7, short sebific duct 8, central tube 9, awl cover 10, round section joint ring 11, cone 12, slips 13, slips spring 14, centralizer body 15, wiper block 16, spring leaf 17, " fourth " shape hook 18, backing-up screw 19 form, its structure, assembled relation are as follows: central tube 9 upper and lower ends are hinged with screw thread respectively top connection 1 and lower contact 20; Central tube 9 outsides are set with successively from top to bottom that hydraulic cylinder 2, piston 3, baffle ring 4, rubber cylinder pressing cap 5, long packing element type 6, spacer ring 7, short rubber cylinder 8, awl cover 10, cone 12, slips 13, centralizer body 15 and " fourth " shape hook 18; Centralizer body 15 outsides are provided with wiper block 16, be provided with spring leaf 17 therebetween, " fourth " shape hook 18 usefulness backing-up screws 19 are fastened on centralizer body 15 bottoms, and slips 13 bottoms are provided with slips spring 14, and top connection 1, hydraulic cylinder 2, piston 3, rubber cylinder pressing cap 5, awl cover and be respectively equipped with round section joint ring 11 on 10.Wherein, central tube 9 upper and lower ends are respectively equipped with external screw thread, and tube wall top is provided with circulation port, and the middle part periphery is provided with a boss.Hydraulic cylinder 2, piston 3 and baffle ring 4 are counterpart.Long packing element type 6, short rubber cylinder 8 shapes, structure are identical, the length difference, and upper and lower two long packing element types, the centre is a short rubber cylinder, separates with spacer ring 7 therebetween.Awl covers 10 and matches up and down with cone 12, and cone 12 bottom male cone (strobilus masculinus)s match with inclined-plane in slips 13 tops.About whole packer total length 1.5m, maximum outside diameter is Φ 80, Φ 100, four kinds of specifications of Φ 114, Φ 145mm, is respectively applied for 5  ", 7 " sidetrack horizontal well and 5  ", 7 " sleeve pipe water plugging of horizontal well pressing crack construction.

Claims (1)

1, a kind of horizontal well sidetrack horizontal well operation packer is by top connection (1), hydraulic cylinder (2), piston (3), baffle ring (4), rubber cylinder pressing cap (5), long packing element type (6), spacer ring (7), short sebific duct (8), central tube (9), awl lid (10), round section joint ring (11), cone (12), slips (13), slips spring (14), centralizer body (15), wiper block (16), spring leaf (17), " fourth " shape hook (18), backing-up screw (19) is formed, it is characterized in that: on the central tube (9), there are top connection (1) and lower contact (20) in the lower end with the screw thread tipping respectively; Central tube (9) outside is set with hydraulic cylinder (2), piston (3), baffle ring (4), rubber cylinder pressing cap (5), long packing element type (6), spacer ring (7), short rubber cylinder (8), awl lid (10), cone (12), slips (13), centralizer body (15) and " fourth " shape hook (18) from top to bottom successively; Centralizer body (15) outside is provided with wiper block (16), be provided with spring leaf (17) therebetween, " fourth " shape hook (18) is fastened on centralizer body (15) bottom with backing-up screw (19), slips (13) bottom is provided with slips spring (14), is respectively equipped with round section joint ring (11) on top connection (1), hydraulic cylinder (2), piston (3), rubber cylinder pressing cap (5), the awl lid (10).

Images