CN2773305Y

CN2773305Y - Hydraulic self sealing hole stopper with position concerned releasement

Info

Publication number: CN2773305Y
Application number: CN 200420108485
Authority: CN
Inventors: 郭建国; 乔忠民; 李松滨
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2004-10-21
Filing date: 2004-10-21
Publication date: 2006-04-19
Anticipated expiration: 2014-10-21

Abstract

The utility model relates to a hydraulic self-sealing abandoned well stopper with position-concerned releasement, which is matched with the well drilling of wells with complicated structures. The utility model has the structure and the technical scheme that an upper joint which is in threaded connection with a releasing head is connected with a stopper through a load bearing ball; the upper end of a cone is in threaded connection with a guide groove, and the lower end of the cone is in threaded connection with a mandrel; the upper end of a slip is in threaded connection with the cone by a shearing nail, the slip, a sliding bush, a seat sealing piston, a tongue-shaped piston, a spacing ring and a sealing gum cylinder are respectively sheathed on the mandrel, and the lower end of the mandrel is in threaded connection with a guide cone; a lock ball is arranged between the tongue-shaped piston and the spacing ring; the lower end of the guide cone is provided with a nozzle, the inner cavity of the nozzle is connected with a valve base by pins, and the inner wall of the valve base is provided with equispaced counter bores which are provided with spring pieces inside; the releasing head is in threaded connection with the mandrel by that the load bearing ball is fixed between the spring piece and the valve seat, a spring is arranged in a preformed groove of the slip, the upper end of a liquid cylinder is sheathed in the slip, and the lower end of the liquid cylinder is sheathed outside the seat sealing piston and the tongue-shaped piston to form a hydraulic cavity. The stopper solves the problems of high cost and environmental pollution in the prior art, and the utility model can be widely used for the matching work of the well drilling of the wells with complicated structures.

Description

Hydraulic pressure takes off with the position hangs the self-sealing hole stopper

Technical field:

The utility model relates to the matched hydraulic pressure of a kind of complex structural well drilling well and takes off extension self-sealing hole stopper with the position.

Background technology:

Oil field well backfill abandoned well warp in to the complex structural well drilling process is used cementing plug always to the abandoned well backfill at present, to side tracking point, the problem that it exists is the cost height, complex procedures with cementing plug abandoned well backfill well, require to wait and coagulate drilling out after 48 hours, prolonged drilling period; Mud contamination is serious, has increased considerably mud maintenance cost and labour intensity, and the discarded slurry contaminated environment of discharging; The cement that the borehole wall is left over easily falls piece in the follow-up hole of back, cause lock of tool drilling, and the high angle hole drilling out is because long period of soaking is easily drawn challenges generations such as well slough, undergauge; Because hole deviation is bigger, easily forms the mud stagnant area, item is for weak effect, and the cement plug plugging effect is poor; Cement strength is lower, and is bigger to the hard formation difficulty of windowing, and influences the drilling tool handling capacity.

The utility model content:

In order to overcome the problem that exists with cementing plug backfill abandoned well in the complex structural well drilling process, the utility model provides a kind of hydraulic pressure to take off with the position and hangs the self-sealing hole stopper.This plug structure compactness, easy to operate, operation are simplified, are shortened drilling period, operating cost is low.

The technical scheme that the utility model technical solution problem is adopted is: hydraulic pressure takes off with the position hangs the self-sealing hole stopper, it comprises top connection, gathering sill, cone, shear pin, slips, spring, sliding sleeve, fluid cylinder, seat envelope piston, sealing ring, ligulate piston, lock ball, ball valve, spring leaf, load-bearing ball, pin, valve seat, give up head, mandrel, spacer ring, cartridge, leading cone, nozzle, top connection links with the captacula of giving up and connects, and connects by the load-bearing ball with the blanking plug body; Cone upper end and gathering sill, lower end and mandrel screwed connection, slips upper end shear pin and cone screwed connection, be enclosed within slips, sliding sleeve, seat envelope piston, ligulate piston, spacer ring, cartridge on the mandrel respectively again, lower end and leading cone screwed connection, between ligulate piston and spacer ring, be provided with lock ball, be provided with nozzle in the leading cone lower end, inner chamber connects by pin with valve seat, its inwall is provided with a plurality of uniform counterbores, the built-in spring sheet, the load-bearing ball is fixed between spring leaf and the valve seat, will give up head and mandrel screwed connection; Give staying at slips and load onto spring in the groove, slips is inserted in the fluid cylinder upper end, and the present envelope of lower end cover piston constitutes hydraulic cavities with ligulate piston outside, and seat seals a piston upper and lower end and is with sealing ring.

The utility model beneficial effect is: this plug structure compactness, simple to operate, disposable shutoff; Can be applied to the well backfill abandoned well construction of multiple well drillng operation simultaneously; Simplify working process, reduce the abandoned well operating cost, shorten drilling period, remarkable in economical benefits, owing to adopt packing element mechanical compress deformable seal and the automatic expansion compensation sealing of material, plugging effect is good; This blanking plug is provided with hydraulic pressure with position seat envelope, and hydraulic pressure takes off extension automatically, can be at the seat envelope deblocking repeatedly of well depth arbitrarily.

Description of drawings:

Fig. 1 is the utility model overall structure schematic diagram.

Among the figure 1, top connection, 2, gathering sill, 3, cone, 4, shear pin, 5, slips, 6, spring, 7, sliding sleeve, 8, fluid cylinder, 9, seat envelope piston, 10, sealing ring, 11, the ligulate piston, 12, lock ball, 13, ball valve, 14, spring leaf, 15, the load-bearing ball, 16, pin, 17, valve seat, 18, the head of giving up, 19, mandrel, 20, spacer ring, 21, cartridge, 22, leading cone, 23, nozzle.

The specific embodiment:

In Fig. 1, hydraulic pressure with the position take off hang that the self-sealing hole stopper comprises top connection 1, gathering sill 2, cone 3, shear pin 4, slips 5, spring 6, sliding sleeve 7, fluid cylinder 8, seat envelope piston 9, sealing ring 10, ligulate piston 11, lock ball 12, ball valve 13, spring leaf 14, load-bearing ball 15, pin 16, valve seat 17, gives up 18, mandrel 19, spacer ring 20, cartridge 21, leading cone 22, nozzle 23; The

top connection

1 and 18 screwed connection of giving up connect by load-bearing ball 15 with the blanking plug body; Cone 3 upper ends and gathering sill 2, lower end and mandrel are screwed connection, again with slips (slips upper end shear pin 4 and cone 3 screwed connections) 5, sliding sleeve 7, seat envelope piston 9, ligulate piston (being provided with lock ball 12 between ligulate piston 11 and the spacer ring 20) 11, spacer ring 20, cartridge 21 is enclosed within respectively on the mandrel 19, lower end and leading cone (the leading cone lower end is provided with nozzle 23) 22 screwed connections, inner chamber connects by pin 16 with valve seat 17, its inwall is provided with a plurality of uniform counterbores, built-in spring sheet 14, load-bearing ball 15 is fixed between spring leaf 14 and the valve seat 17, will give up 18 to be connected with mandrel 19; Slips (give staying load onto spring 6 in the groove at slips) 5 is inserted in fluid cylinder 8 upper ends, and lower end cover present envelope piston (upper and lower end is with sealing ring 10) 9 and ligulate piston 11 outsides constitute hydraulic cavities.During this blanking plug work, when the choke pressure of nozzle 23 reached 5MPa, mud was by the runner on the mandrel 19, enter hydraulic cavities, upwards act on the sliding sleeve 7 to promote to move on the seat envelope piston 9 slips 5 is opened, seat hangs on the borehole wall, slips is provided with horizontal tooth and perpendicular tooth, prevents that blanking plug is loosening; Drop into ball valve 13, when displacement pressure reached 18MPa, hydraulic pressure acted on section on the ligulate piston 11 downwards, produce downward axial compression, 21 distortion of compression seal packing element, the shutoff annular space, lock ball 12 falls simultaneously, produce self-lock force with ligulate piston 11, prevent that cartridge 21 elasticity from recovering, if want deblocking, on put and put drilling tool lock ball 12 and move up, slips 5 is regained under spring 6 effects, i.e. deblocking; When pressure reaches 25MPa, cut off pin 16, ball valve 13 is located on the 18 interior step of giving up with valve seat 17, spring leaf 14 elastic force inwardly come off load-bearing ball 15, pump pressure descends, and promptly finishes and takes off extension, pulls out of hole and takes the head of giving up, valve seat, ball valve, load-bearing ball, top connection out of; Gathering sill 2 can be changed the inclined-planes of angle according to side tracking point hole angle difference, and has drillability, simultaneously can be to the inclined-plane tool face orientation; Cartridge 21 can expand after 10 hours automatically at contact mud, and it is self-styled to finish second compensation; Circular leading cone 22 prevents slacking off.

Claims

1, a kind of hydraulic pressure takes off with the position hangs the self-sealing hole stopper, it comprises top connection (1), gathering sill (2), cone (3), shear pin (4), slips (5), spring (6), sliding sleeve (7), fluid cylinder (8), seat envelope piston (9), sealing ring (10), ligulate piston (11), lock ball (12), ball valve (13), spring leaf (14), load-bearing ball (15), pin (16), valve seat (17), give up (18), mandrel (19), spacer ring (20), cartridge (21), leading cone (22), nozzle (23), it is characterized in that: the top connection (1) and head (18) screwed connection of giving up connect by load-bearing ball (15) with the blanking plug body; Cone (3) upper end and gathering sill (2), lower end and mandrel (19) screwed connection, slips (5) upper end shear pin (4) and cone (3) screwed connection, again with slips (5), sliding sleeve (7), seat envelope piston (9), ligulate piston (11), spacer ring (20), cartridge (21) is enclosed within respectively on the mandrel (19), lower end and leading cone (22) screwed connection, between ligulate piston (11) and spacer ring (20), be provided with lock ball (12), be provided with nozzle (23) in leading cone (22) lower end, inner chamber connects by pin (16) with valve seat (17), its inwall is provided with a plurality of uniform counterbores, built-in spring sheet (14), load-bearing ball (15) is fixed between spring leaf (14) and the valve seat (17), will give up head (18) and mandrel (19) screwed connection; Give staying at slips and load onto spring (6) in the groove, slips (5) is inserted in fluid cylinder (8) upper end, and lower end cover present envelope piston (9) constitutes hydraulic cavities with ligulate piston (11) outside, and seat envelope piston (a 9) upper and lower end is with sealing ring (10).