CN204002701U - Pressure-controlled testing valve - Google Patents

Abstract

Pressure-controlled testing valve, belongs to oil stratum switch well tool.Technical problem to be solved puts and puts test string on being, in operation, easily submits packer, causes packer pressure release, at superpressure layer upper lifting pipe post, easily occurs to alter on tubing string, causes the difficulty that drives a well, and has in operation the danger of blowout.Solve the technical scheme of its technical problem, upper binding head with upper valve base mandrel to be threaded, upper ball base mandrel and ball valve urceolus have adopted spline joint, motion arm is installed in the annular space of upper valve base mandrel and lower valve base mandrel and ball valve urceolus formation, in the spherical plush copper embedding in inside and the radially circular hole on ball valve of motion arm, in ball seat, installed disk spring sheet additional; End cap all adopts and is threaded with ball valve urceolus, transposition urceolus up and down with connecting short section, power sub with shearing mandrel, branch sleeve, shears between mandrel and power sub and has adopted spline joint; Power sub utilizes shear pin to fix with shearing mandrel, shears mandrel and adopts and be threaded with power mandrel, has annulus bore A on power sub.

Description

Pressure-controlled testing valve

Technical field

The utility model belongs to oil stratum switch well tool, and what be specifically related to is pressure-controlled testing valve.

Background technology

In existing measuring technology, the tester of employing is that top putting put test string and carried out opening or closing operation.In practical operation, during upper lifting pipe post, easily carry loose packer, cause packer pressure release; At superpressure layer upper lifting pipe post, easily occur to alter on tubing string, cause the difficulty that drives a well, and have in operation the danger of blowout; Common test instrument mandrel is meticulous, and other instrument cannot pass through from its inside, has reduced testing efficiency, and high-yield well easily produces throttling, affects evaluating production capacity.

Summary of the invention

In order to put on overcoming, put test string, in operation, easily submit packer, cause packer pressure release, at superpressure layer upper lifting pipe post, easily occur to alter on tubing string, cause the difficulty that drives a well, and there is in operation the danger of blowout, common test instrument mandrel is meticulous, other instrument cannot pass through from its inside, reduced testing efficiency, high-yield well easily produces throttling, affect evaluating production capacity, problem for above-mentioned appearance, the utility model provides a kind of pressure-controlled testing valve, the in the situation that of fixed tubular column, by annular pressure gauge tap well, operate, simple to operate, well control performance is good, effectively prevented the generation of gas blowout accident, this valve has adopted large latus rectum, can make the testing tools such as electronic pressure gauge be lowered to, and the data of evaluating stratum can be provided more accurately.

The technical scheme in the invention for solving the technical problem is: this instrument is by upper binding head, upper valve base mandrel, ball valve urceolus, motion arm, ball seat, disk spring, lower valve base mandrel, connecting short section, shear mandrel, power sub, power mandrel, transposition urceolus, transposition cover, note nitrogen pipe nipple, nitrogen urceolus, dummy piston, nitrogen chamber mandrel, pressure transmission pipe nipple, hydraulic pressure urceolus, hydraulic pressure mandrel, compensating piston, boosting piston, lower contact, end cap, branch sleeve, safety pin cap, shear pin, non-extrusion ring, stop screw, nitrogen plug, nitrogen injecting valua, extrusion ring, ball valve forms, the internal whorl of upper binding head is connected with test string, upper binding head with upper valve base mandrel to be threaded, upper ball base mandrel and ball valve urceolus have adopted spline joint, motion arm is installed in the annular space of upper valve base mandrel and lower valve base mandrel and ball valve urceolus formation, in the spherical plush copper embedding in inside and the radially circular hole on ball valve of motion arm, under the effect of actuating unit, motion arm drives ball valve to open and close.In ball seat, installed disk spring sheet additional; End cap all adopts and is threaded with ball valve urceolus, transposition urceolus up and down with connecting short section, power sub with shearing mandrel, branch sleeve, shears between mandrel and power sub and has adopted spline joint; Power sub utilizes shear pin to fix with shearing mandrel, shears mandrel and adopts and be threaded with power mandrel, has annulus bore A on power sub.

The beneficial effects of the utility model are, this pressure-controlled testing valve operates by annular pressure gauge tap well in the situation that of fixed tubular column, simple to operate, well control performance is good, has effectively prevented the generation of gas blowout accident.This valve has adopted large latus rectum, can make the testing tools such as electronic pressure gauge be lowered to, and the data of evaluating stratum can be provided more accurately.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

1 upper binding head in figure, 2 upper valve base mandrels, 3 ball valve urceolus, 4 motion arms, 5 ball seats, 6 disk springs, 7 lower valve base mandrels, 8 connecting short sections, 9 shear mandrel, 10 power subs, 11 power mandrels, 12 transposition urceolus, 13 transposition covers, 14 note nitrogen pipe nipples, 15 nitrogen urceolus, 16 dummy pistons, 17 nitrogen chamber mandrels, 18 pressure transmission pipe nipples, 19 hydraulic pressure urceolus, 20 hydraulic pressure mandrels, 21 compensating pistons, 22 boosting pistons, 23 lower contacts, 24 end caps, 25 branch sleeves, 26 safety pin caps, 27 shear pins, 28 non-extrusion rings, 29 stop screw, 30 nitrogen plugs, 31 nitrogen injecting valuas, 32 extrusion rings, 33 ball valves, 34 annulus bore A, 35 annulus bore B, 36 annulus bore C, 37 annulus bore D.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described: as shown in Figure 1 and Figure 2, below in conjunction with accompanying drawing, the utility model is further described: as Fig. 1 shows, ball valve part consists of upper binding head 1, upper valve base mandrel 2, ball valve urceolus 3, motion arm 4, ball seat 5, butterfly spring 6, lower valve base mandrel 7, connecting short section 8, branch sleeve 25, ball valve 33, and this part mainly realizes the function of switching ball under the effect of actuating unit; The internal whorl of upper binding head 1 is connected with test string, and upper binding head 1 is with upper valve base mandrel 2 to be threaded, and upper ball base mandrel 2 has adopted spline joint with ball valve urceolus 3, is convenient to install; Motion arm 4 is installed in the annular space that upper valve base mandrel 2 and lower valve base mandrel 3 and ball valve urceolus 3 form, and on the spherical plush copper embedding in inside of motion arm 4 and ball valve 33, radially in circular hole, under the effect of actuating unit, motion arm 4 drives ball valves 33 open and close; In ball seat, installed disk spring sheet 6 additional, utilize the effect of disk spring sheet 6, can guarantee the smooth unlatching of ball valve, the sealing that also can guarantee ball valve is reliable, the sealing of this part has all adopted rubber sealing, screw thread has adopted senior sealing screw thread (CAS button) bearing capacity high, can guarantee to connect closely reliable in high-pressure gas well; Actuating unit forms by shearing mandrel 9, power sub 10, power mandrel 11, end cap 24, safety pin cap 26, shear pin 27, non-extrusion ring 28; End cap 24 all adopts and is threaded with ball valve urceolus 3, transposition urceolus 12 Shang Xia 10 with connecting short section 8, power sub with shearing mandrel 9, branch sleeve 25, shear mandrel 9 and 10 of power subs and adopted spline joint, guaranteeing to shear mandrel 9 can move up and down, shear the hole that radially has 5 millimeters of 2 diameters of mandrel 9 as relief hole, before tester switch, after first pressure release, open, can avoid occurring because the upper and lower pressure reduction of ball valve is excessive switch difficulty or damage ball valve, having extended the application life of ball valve; Power sub 10 utilizes shear pin to fix with shearing mandrel 9, shearing mandrel 9 adopts and is threaded with power mandrel 11, on power sub 10, have annulus bore A 34, power mandrel 11 one end are communicated with nitrogen chamber, and the other end is communicated with annular space fluid column by annulus bore A 34; When instrument is gone into the well, ball valve 33 is in closed condition.Arrive desired depth, after packer set, applied pressure by annulus, pressure-acting on power mandrel 11, compressed nitrogen, power mandrel 11 drives to be sheared mandrels 9 and moves down, cut off shear pin 27, shear mandrel 9 and drive branch sleeve 25, connecting short section 8 and motion arm 4 to make ball valve 33 rotating opening, realization drives a well.Discharging annular pressure, under the effect of nitrogen, on power mandrel 11, move, drive motion arm 4 that ball valve 33 is rotated and close, realize closing well. the sealing of this part has all adopted the structure of O-ring seal additional support ring, has increased abrasion resistance and the reliability of sealing.Screw thread has adopted senior sealing screw thread, has increased the safety and reliability connecting.Inversion mechanism consists of the urceolus 12 that replaces, transposition cover 13, note nitrogen pipe nipple 14, nitrogen urceolus 15, dummy piston 16, nitrogen chamber mandrel 17, pressure transmission pipe nipple 18, prevention screw 29, nitrogen plug 30, nitrogen injecting valua 31, extrusion ring 32; Nitrogen chamber mandrel 17 plush coppers, as sliding pin, can be slided in the transposition slideway in transposition cover, to realize ball valve 33, open and close; The annular space that nitrogen chamber mandrel 17 and nitrogen chamber urceolus 15, note nitrogen pipe nipple 14 and dummy piston are 16 has formed nitrogen chamber, on note nitrogen pipe nipple 14, have two axially extending bores as pressure transmission passage, nitrogen plug 30 and nitrogen injecting valua 31 are radially installed, before going into the well, base area surface temperature, bottom hole temperature (BHT) and liquid column hydrostatic pressure, on ground, in the face of nitrogen chamber, rush nitrogen to predetermined pressure, this pressure-acting, on power mandrel 11, makes ball valve 33 when instrument is gone into the well, remain closed condition.Dummy piston 16 is positioned at the annular space of nitrogen chamber urceolus 15 and 17 formation of nitrogen chamber mandrel, and the inside and outside sealing ring that all adopts is accompanied by support ring as sealing, has increased the safety and reliability of sealing; Compensation mechanism consists of hydraulic pressure urceolus 19, hydraulic pressure mandrel 20, compensating piston 21, boosting piston 22, lower contact 23, the annular space that hydraulic pressure urceolus 19, hydraulic pressure mandrel 20, pressure transmission pipe nipple 18 and compensating piston 21 form is as nitrogen compensated chamber, and the annulus bore B 35 on hydraulic pressure urceolus 19 communicates with annular space space; Compensating piston 21 has formed upper oil cavitie with hydraulic pressure mandrel 20, annulus bore D 37 on hydraulic pressure mandrel 20 communicates with tubing string inside, the external seal of compensating piston 21 adopts O-ring seal sealing, and interior sealing has adopted under any pressure state all very stable and withstand voltage higher rectangular seal; Hydraulic pressure urceolus 19, hydraulic pressure mandrel 20, boosting piston 22 and lower contact 23 have formed lower oil cavitie by rubber sealing, and the annulus bore C 36 on hydraulic pressure urceolus 19 communicates with annular space space.In lower tubular column process, liquid column hydrostatic pressure enters upper oil cavitie by annulus bore D 37, and upper oil cavitie volume increases, compensating piston 21 is up, and annulus bore B 35 is sealed, simultaneously under upper oil cavitie pressure-acting, the end face of boosting piston 22 and lower contact 23 near, sealed annulus bore C 36; After compensating piston 21 is up, compensated chamber is compressed, the pressure transmission channeling of pressure by pressure transmission pipe nipple 18 is on dummy piston 16, on dummy piston 16, move, nitrogen cavity volume is dwindled, and nitrogen pressure is increased, and passes to motion arm 4 make ball valve 33 keep closed condition by power mandrel 11, instrument go into the well nitrogen chamber and upper oil cavitie pressure balance in process, in dynamic equilibrium state.The operating pressure of tester can not changed with the variation of well depth, remain a fixed value, reduced operation easier.After packer set, applied pressure by annulus, when upper lower oil cavitie pressure initiation pressure reduction does not also reach balance, power mandrel 11 moves down and drives motion arm 4, makes ball valve 33 rotating opening.Reach after dynamic equilibrium, ball valve 33 remains on open mode.The connection of this part has adopted senior sealing screw thread (CAS button), has increased the safety and reliability connecting.

Claims (1)

1. a pressure-controlled testing valve, by upper binding head (1), upper valve base mandrel (2), ball valve urceolus (3), motion arm (4), ball seat (5), disk spring (6), lower valve base mandrel (7), connecting short section (8), shear mandrel (9), power sub (10), power mandrel (11), transposition urceolus (12), transposition cover (13), note nitrogen pipe nipple (14), nitrogen urceolus (15), dummy piston (16), nitrogen chamber mandrel (17), pressure transmission pipe nipple (18), hydraulic pressure urceolus (19), hydraulic mandrel (20), compensating piston (21), boosting piston (22), lower contact (23), end cap (24), branch sleeve (25), safety pin cap (26), shear pin (27), non-extrusion ring (28), stop screw (29), nitrogen plug (30), nitrogen injecting valua (31), extrusion ring (32), ball valve (33), annulus bore A (34), annulus bore B (35), annulus bore C (36), annulus bore D (37) forms, the internal whorl of upper binding head (1) is connected with test string, upper binding head (1) with upper valve base mandrel (2) to be threaded, upper valve base mandrel (2) has adopted spline joint with ball valve urceolus (3), motion arm (4) is installed in the annular space of upper valve base mandrel (2) and lower valve base mandrel (7) and ball valve urceolus (3) formation, in the spherical plush copper embedding in inside and the radially circular hole on ball valve (33) of motion arm (4), under the effect of actuating unit, motion arm (4) drives ball valve (33) to open and close, in ball seat (5), installed disk spring (6) sheet additional, end cap (24) all adopts and is threaded with ball valve urceolus (3), transposition urceolus (12) up and down with connecting short section (8), power sub (10) with shearing mandrel (9), branch sleeve (25), shears between mandrel (9) and power sub (10) and has adopted spline joint, power sub (10) utilizes shear pin (27) fixing with shearing mandrel (9), shears mandrel (9) and adopts and be threaded with power mandrel (11), has annulus bore A (34) on power sub (10).