CN2336086Y - Water packer - Google Patents

Abstract

The utility model discloses a water packer, which belongs to a well tool used for packing an oil layer at oil field. For reducing cost and the requirements for adapting the subdivision water blockage of the oil field, the utility model is characterized in that an upper and a lower glue barrels of the packer are directly contacted with a middle glue barrel; the outer surface of the lower part of a center pipe is provided with saw tooth buckles; the inner and the outer surfaces of a locking ring are both provided with the saw tooth buckles; the inner part of an annular groove at the outer surface of a locking sleeve is placed with a shearing block. The packer is mainly used for spacing the oil layer and forming a multifunctional water blocking pipe column with a matching tool to realize multi-stage water exploration and water blockage technology in an oil well. The utility model has the advantages of convenient assembly and pressure test, and the sealed rate improvement on the packer, etc.

Description

A kind of Packer for blocking water

The utility model belongs to the downhole tool that the oil field is used for oil-separating layer.

Patent Office of the People's Republic of China has announced Wel packing on April 6th, 1994, and notification number CN2160750Y, application number are 93218082.5.This packer has the following disadvantages in the implementation process of oil field:

A, as shown in Figure 2, existing packing element are upper and lower packing element 1 and 2 three packing element combining structures of middle packing element, and are added with metal spacer ring 3 between adjacent two packing elements.Because the packing element combination is long, compression makes that apart from increase thereupon the instrument total length is elongated, and processing cost increases.

B, existing packer retaining mechanism are that the multiple tracks zigzag annular groove 7 that adopts twice jump ring 5 and jump ring to overlap 6 bottoms matches, and realize retaining, make packer be in the state of setting.Because the spacing of zigzag annular groove is generally 6-8mm, so after finishing packer setting, the distance that the packing element bounce-back is return is also bigger, is unfavorable for guaranteeing the packing element excellent sealing performance.

C, existing packer bushing pipe 4 external diameters are bigger, so must be provided with in the process that three compensating cylinders could guarantee on holding to press or to press down, the deblocking pin does not stress, and this structure is waste material not only, increases cost, and tool length increases, be unfavorable for assembling and The field, simultaneously, because compensating cylinder is many, seal point is also many, and the seal failure probability also increases.

The deblocking of d, existing packer is realized by breaking deblocking pin 8.Owing to be subjected to the influence of factors such as material, in upper lifting pipe post deblocking process, the deblocking pin is sometimes because of unbalance stress, shears asynchronously, cuts constantly sometimes at all, influences packer deblocking effect.

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art, and the compression oil well Packer for blocking water after a kind of the improvement is provided.

The upper and lower packing element of packer accessory of the present utility model part directly contacts with middle packing element, the metal spacer ring in the middle of having cancelled, and go up lower rubber cylinder and middle packing element contact surface is thrust surface and protective surface, and it is original 1/2 to make that tool length has shortened, and has reduced processing cost.Respectively at the upper baffle ring of steel body portion, lower baffle ring has intake chute up and down, the central tube lower external face is provided with the sawtooth button, the retaining ring surfaces externally and internally is provided with the sawtooth button, and on retaining ring, drive vertical grooving, for the sawtooth padlock that makes retaining ring and central tube dead, form retaining, retaining ring answers interference fit to be connected with central tube, the two assembling for the benefit of and on retaining ring, drive vertical grooving, the lock sleeve inner surface is provided with the sawtooth button, because the pitch of this sawtooth button is less, the distance that packing element is return behind the packer setting is also very little, help improving the sealing of packing element, put into cutout in lock sleeve external surface cannelure, cutout both ends of the surface is up and down located by pressure-bearing cover lower surface and setting sleeve inner upper end face.Thisly replaced original deblocking pin, can effectively avoid the bad problem of packer deblocking effect that causes because of the material capability influence with cutout.

Change bushing pipe into one-level by three grades, and change compensating cylinder into two-stage by three grades, reduced cost, improved sealing, upper positioning body is to be fixed on the positioning step of bushing pipe bottom by last locating ring, is positioned under the pressure guide hole of bushing pipe middle part, through bushing pipe power is delivered on the central tube.

The utility model compared with prior art has following advantage:

(1) appropriate design the structure of packer accessory and upper and lower baffle ring, shortened tool length, reduced processing cost.

(2) make behind this packer setting the distance of packing element resilience little, improved the sealing effectiveness of packer, and can avoid the bad problem of packer deblocking effect that causes because of the material capability influence effectively.

(3) assembling, pressure testing conveniently help improving the packaging efficiency of instrument.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the utility model structural representation;

Fig. 2 is existing packer construction schematic diagram.

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

The packer accessory of this packer is made up of with middle packing element 14 last lower rubber cylinder 13.The steel body portion by top connection 9, adjustable ring 10, central tube 11, upper baffle ring 12, bushing pipe 15, lower baffle ring 16, dummy piston 17, sealing ring 18, go up locating ring 19, upper positioning body 20, Pressure Block 21, pressure-bearing cover 22, down dummy piston 23, set piston 24, down positioning body 25, retaining ring 26, lock sleeve 27, cutout 28, setting sleeve 29, set pin 30, parts such as adjustable ring 31, lower contact 32 are formed down.

Central tube 11 and top connection 9, lower contact 32 screwed connections are set with 20, two screwed connections of locating ring 19 and upper positioning body and cooperate the axial location that realizes upper positioning body 20 with bushing pipe 15 outer steps 37 at the middle part of bushing pipe 15.In bushing pipe 15 upper ends suit dummy piston 17 successively, lower baffle ring 16, packing element (13,14), upper baffle ring 12.With top connection 9 with the adjusted ring 10 screwed connections be in the same place, then with top connection 9 and central tube 11 screwed connections, and regulate adjusted ring 10 with bushing pipe 15 axial location.The intake chute 33 of upper and lower baffle ring (12,16) end face contacts with adjusted ring 10 and Pressure Block 21 respectively, is used to realize the compensating cylinder pilot.

Setting inlet opening 39 in the middle of central tube 11 bottoms, is positioning body 25 down under inlet opening 39, links by screw thread and central tube 11, realizes the axial location of positioning body 25 down.The sealing ring 18 of following positioning body 25 inner surfaces sets between inlet opening 39 and the thread at central tube 11.By lower baffle ring 16, dummy piston 17, upper positioning body 20 and Pressure Block 21; Following dummy piston 23 sets piston 24, and pressure-bearing cover 22 forms two groups of dummy piston cylinders between the following positioning body 25, and is connected with pressure guide hole (36,38) on the bushing pipe 15 respectively.Upper positioning body 20 can limit the stroke that Pressure Block 21 makes progress, and is no more than bushing pipe 15 lower end pressure guide holes 38 when up to guarantee down dummy piston 23.Screwed connection and realization sealing between Pressure Block 21 and the pressure-bearing cover 22.

Be processed with sawtooth button 40 in central tube 11 bottoms, with retaining ring 26, lock sleeve 27 matches and finishes the packing element retaining of envelope packing, makes packer be in the state of setting all the time.In the cannelure of lock sleeve 27 external surfaces, cutout 28 is housed in 41, and is positioned at pressure-bearing and overlaps between 22 lower surfaces and the setting sleeve 29 inner upper end faces screwed connection between pressure-bearing cover 22 and the setting sleeve 29.Following adjustable ring 31 and lower contact 32 screwed connections, and fixing between the setting sleeve 29 by setting pin 30.

During on-the-spot the use, packer top connection 9, lower contact 32 respectively with the oil pipe screwed connection, by designing requirement down to the precalculated position.During this packer setting, in oil pipe, add hydraulic pressure, hydraulic pressure acts on through the inlet opening on the central tube 11 39 and sets on the piston 24, promote dummy piston 23, Pressure Block 21, lower baffle ring 16 down, drive pressure-bearing cover 22, setting sleeve 29 is up, set pin 30 and cut off, in setting sleeve 29 up processes, through inner surface step 42 drive lock sleeves 27, retaining ring 26 is up along the sawtooth button 40 of central tube 11 bottoms.By upper baffle ring 12 lower baffle rings 16 compression packing elements, packing oil pipe annular space.Bleed off tubing pressure this moment, retaining ring 26 and central tube bottom sawtooth button 40 locked formation retainings make packing element be in the state of setting all the time.

Packer is in when setting state, because the effect of two-stage balanced piston rod, no matter packing element top pressure-bearing still is the bottom pressure-bearing, and cutout does not all stress, and keeps packer to be in the state of setting all the time.

During the packer deblocking, on carry central tube 11, it is up to drive retaining ring 26 lock sleeves 27, the packing element frictional force that is close to internal surface of sleeve pipe is very big, make Pressure Block 21, pressure-bearing cover 22 and setting sleeve 29 keep motionless, produce relative motion between pressure-bearing cover 22 and the lock sleeve 27, cutout 28 is stressed and cut off.Under the effect of packing element elastic force, Pressure Block 21, pressure-bearing cover 22 and setting sleeve 29 reset, and finish the deblocking of packer.

Claims (3)

1; a kind of Packer for blocking water; it is made up of packer accessory and steel body two large divisions; it is characterized in that: on the packer accessory part; lower rubber cylinder (13) directly contacts with middle packing element (14); metal spacer ring in the middle of having cancelled; and on; lower rubber cylinder (13) and middle packing element (14) contact surface are thrust surface (34) and protective surface (35); respectively at the upper baffle ring (12) of steel body portion; lower baffle ring (16) has intake chute (33) up and down; central tube (11) lower external face is provided with sawtooth button (40); retaining ring (26) surfaces externally and internally is provided with the sawtooth button; and on retaining ring (26), drive vertical grooving; lock sleeve (27) inner surface is provided with the sawtooth button; and in the cannelure (41) of lock sleeve (27) external surface, put into cutout (28), cutout (28) both ends of the surface is up and down located by pressure-bearing cover (22) lower surface and setting sleeve (29) inner upper end face.

2, packer according to claim 1, it is characterized in that: bushing pipe (15) changes one-level into by three grades, compensating cylinder is designed to two-stage, in two-stage balanced cylinder, upper positioning body (20) is to be fixed on the positioning step (37) of bushing pipe (15) bottom by last locating ring (19), and is positioned under bushing pipe (15) the middle part pressure guide hole (36).

3, packer according to claim 1 is characterized in that: cutout (28) is six, and is evenly distributed in lock sleeve (27) the external surface cannelure (41).

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