CN2630485Y

CN2630485Y - Release-free throuring-fishing-free flushing packer

Info

Publication number: CN2630485Y
Application number: CN 03260976
Authority: CN
Inventors: 韩明胜; 王祥利
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-11
Filing date: 2003-08-11
Publication date: 2004-08-04
Anticipated expiration: 2013-08-11

Abstract

A releasing-and-salvage-free washable well packer is primarily used to resolve the problem that the current packer cannot achieve pressure balance and has an inferior sealing effect. The utility model is characterized in that a seat sealing plunger (4) and a well washing plunger (5) are installed between a central pipe (3) with a groove (6) and an upper load-bearing sleeve (2), the outside of the groove (6) is provided with a caulking pipe (11) with a boss (10), the upper part is provided with a balance plunger (12), a rubber tube (8) of an interval holding caulking ring (9) is outside the caulking pipe (11), and a caulking pipe joint (7) is clamped with the well washing plunger (5); a seat sealing plunger (23),a pressure plunger (22) and a seat sealing cutting sleeve (20) are arranged between the central pipe (3) and a lower load-bearing sleeve (21), wherein, the seat sealing cutting sleeve (20) and the lower load-bearing sleeve (21) are provided with a releasing head (13), the upper head is positioned between the rubber tube (8) and the releasing head (13) and a clamped fixed plunger (15) and a circlip hanging (17) are arranged among the central pipe (3), the seat sealing cutting sleeve (20) and the releasing head (13). The device has the advantages of pressure difference balancing, good sealing and caulking effect and high rate of success in seat sealing and unsealing.

Description

A kind ofly exempt to discharge casting and dragging free washing well packer

Technical field:

The utility model relates to the used packer of oil field oil production engineering seperated layer water injection field of tool, belongs to a kind of casting and dragging free washing well packer of exempting to discharge.

Background technology:

In the oil production engineering in oil field, often use packer, packer is exactly when seperated layer water injection multiple zone to be divided into some intervals, and the instrument of oil reservoir water absorption difference is regulated in oil reservoir control water filling.The kind of packer is a lot, central tube under institute's use packer top connection is equipped with compression valve outward at present, and top connection is equipped with valve body outward, and the well-flushing passage is by this valve control, complex structure, do not have fixed piston, can not carry out pressure balance, therefore at well-flushing or when not needing deblocking because the easy deblocking of existence of pressure reduction, do not increase mechanism, the release that needs the external application pressurized equipment to carry out packing element sets, and wastes time and energy the cost of production height.

The utility model content:

Can not carry out the deficiency that pressure balance causes the packing weak effect in order to overcome existing packer, the utility model provides a kind of and exempts to discharge casting and dragging free washing well packer, but has the advantages that balance pressure reduction and packing are imitated.

The technical scheme that the utility model adopted is: this is exempted to discharge casting and dragging free washing well packer and comprises upper and lower joint, packing element, spacer ring, central tube, be equipped with central tube and upper and lower pressure-bearing cover inside and outside the upper and lower joint respectively, have to be equipped with between the central tube of groove and the last pressure-bearing cover and set piston and well-flushing piston, pipe and boss upper end that groove is equipped with the band boss outward are equipped with dummy piston, and the packing element of interval clamping spacer ring places outside the pipe and the pipe joint blocks the well-flushing piston mutually; Be equipped with successively between central tube and the following pressure-bearing cover and set piston, charged piston and set cutting ferrule, set cutting ferrule and following pressure-bearing and put and be equipped with upper end and place release head between packing element and the dummy piston, central tube is equipped with between the head that the fixed piston and the jump ring of card are hung mutually with setting cutting ferrule and discharge.

Above-mentioned fixed piston and jump ring are hung by the deblocking dowel fixes; Jump ring is hung the outer band jump ring that is equipped with by the jump ring of cap.

The beneficial effects of the utility model are: this packer has increased area of passage owing to have the well-flushing passage on central tube, has improved the well-flushing discharge capacity; Owing to set piston, set cutting ferrule, formed an airtight booster cavity between central tube and the fixed piston, along with the increase of well depth down, the pressure reduction that sets the piston both sides also increases, and increases the existence of piston, does not need to add supercharging equipment and just can realize setting of packer; Adopt fixed piston to form balance type structure up and down, can bear bigger pressure reduction, avoided packer to shift to an earlier date deblocking owing to bigger interlayer pressure difference causes packer, played the effect of balance pressure reduction, improved the packing performance of packer effectively, constitute the well-flushing passage between groove on the central tube and the pipe, can increase the well-flushing discharge capacity, owing to there is said structure, this packer does not need cement pump truck or pressurized equipment just to suppress can to set, and the water distribution mouth can not need pulling equipment with in the direct lower going-into-well of packer, time saving and energy saving, cost of production is low.

Description of drawings:

Fig. 1 is the utility model structure sectional view.

1-top connection among Fig. 1, the last pressure-bearing cover of 2-, the 3-central tube, 4-sets piston, 5-well-flushing piston, the 6-groove, 7-pipe joint, 8-packing element, 9-spacer ring, the 10-boss, the 11-pipe, the 12-dummy piston, 13-discharges head, the 14-release pin, the 15-fixed piston, 16-deblocking pin, the 17-jump ring is hung, the 18-jump ring, the 19-jump ring is by cap, and 20-sets cutting ferrule, pressure-bearing cover under the 21-, the 22-charged piston, 23-sets piston, 24-lower contact, 25-well-flushing passage.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in fig. 1, this is exempted to discharge casting and dragging free washing well packer and comprises upper and lower joint (1,24), packing element 8, spacer ring 9, central tube 3, upper and lower joint (1,24) be equipped with central tube 3 and upper and lower pressure-bearing cover (2,21) inside and outside respectively, have to be equipped with between the central tube 3 of groove 6 and the last pressure-bearing cover 2 and set piston 4 and well-flushing piston 5, enter the epicoele that sets piston 4 through water injection hole during water filling, under the effect of pressure, promote to set piston 4 and move down and to push packing element 8 and set; Groove 6 outer pipe 11 and boss 10 upper ends that are equipped with band boss 10 are equipped with dummy piston 12, constitute well-flushing passage 25 between groove 6 on the central tube 3 and the pipe 11, can increase the well-flushing discharge capacity, but dummy piston 12 balances up and down pressure reduction to guarantee the packing effect of packer when not needing deblocking; The packing element 8 of interval clamping spacer ring 9 places outside the pipe 11 and pipe joint 7 blocks well-flushing piston 5 mutually; Be equipped with successively between central tube 3 in the lower contact 24 and the following pressure-bearing cover 21 and set piston 23, charged piston 22 and set cutting ferrule 20, setting cutting ferrule 20 and following pressure-bearing cover is equipped with upper end on 21 and places release 13 between packing element 8 and the dummy piston 12, the injection hole of liquid below packer enters and promotes to set piston 23 and move, 22 pairs of liquid of charged piston this moment further increase pressure, promote to discharge 13 packing element 8 spreadings are set, do not need to finish the release of packing element 8 at the external application pressurized equipment; Central tube 3 is equipped with card mutually and hangs 17 by deblocking pin 16 fixing fixed piston 15 and jump ring with setting cutting ferrule 20 and discharge between 13, set piston, set airtight booster cavity of formation between cutting ferrule central tube and the fixed piston, along with the increase of well depth down, the pressure reduction that sets two in piston also increases, can play the effect of balance pressure reduction, jump ring is hung the 17 outer band jump rings that are equipped with by the jump ring 18 of cap 19.

When setting, in oil pipe, suppress, liquid affacts from the biography liquid hole on the centre bore and sets on the piston 4, when pressure reaches one regularly, setting piston 4, to promote to set cutting ferrule 20 up, cuts off release pin 14, and compression packing element 8, when reach certain compression apart from the time, jump ring 18 pins and sets cutting ferrule 20, packer is in running order.

During well-flushing, water filling well-flushing pressure liquid in oil, collar-shaped space, under pressure, well-flushing piston 4 is by well-flushing pressure liquid pushed home, the well-flushing passage 25 of well-flushing pressure liquid between groove on the central tube 36 and pipe 11 is by packing element 8 sealing positions, pressure liquid is opened the well-flushing passage of packers at different levels from top to bottom step by step, finishes washing well process.

During deblocking, the upper lifting pipe post relies on the packing element 8 and the frictional force of sleeve pipe to break deblocking pin 16, and packing element 8 reinstatement attitudes are finished deblocking.

This packer has an airtight booster cavity owing to there is said structure, and water injection pressure just can be realized the setting of release packer of packing element 8, does not need the cement pump truck or adds the equipment of suppressing; Directly in the injection well downhole flow regulator in tubing string water nozzle is installed, is not needed pulling equipment, can realize the injecting process; The well-flushing passage is big, has increased to cross to roll area, and well washing effect is good, sets, deblocking is effective, time saving and energy saving, and cost of production is low.

Claims

1, a kind ofly exempt to discharge casting and dragging free washing well packer, comprise, lower contact (1,24), packing element (8), spacer ring (9), central tube (3), on, lower contact (1,24) being equipped with central tube (3) inside and outside respectively reaches, following pressure-bearing cover (2,21), it is characterized in that: have to be equipped with between the central tube (3) of groove (6) and the last pressure-bearing cover (2) and set piston (4) and well-flushing piston (5), outer pipe (11) and boss (10) upper end that is equipped with band boss (10) of groove (6) is equipped with dummy piston (12), and the packing element (8) of interval clamping spacer ring (9) places outside the pipe (11) and pipe joint (7) blocks well-flushing piston (5) mutually; Be equipped with successively between central tube (3) and the following pressure-bearing cover (21) and set piston (23), charged piston (22) and set cutting ferrule (20), set and be equipped with upper end on cutting ferrule (20) and the following pressure-bearing cover (21) and place release head (13) between packing element (8) and the dummy piston (12), central tube (3) is equipped with between the head (13) that the fixed piston (15) and the jump ring of card are hung (17) mutually with setting cutting ferrule (20) and discharge.

2, a kind of casting and dragging free washing well packer of exempting to discharge according to claim 1 is characterized in that: fixed piston (15) is hung (17) with jump ring and is fixed by deblocking pin (16).

3, a kind of casting and dragging free washing well packer of exempting to discharge according to claim 1 is characterized in that: jump ring is hung (17) outer band jump ring that is equipped with by the jump ring of cap (19) (18).