CN2512902Y

CN2512902Y - High pressure packing one-step filling tool

Info

Publication number: CN2512902Y
Application number: CN 01268457
Authority: CN
Inventors: 孔利生
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-09
Filing date: 2001-11-09
Publication date: 2002-09-25
Anticipated expiration: 2011-11-09

Abstract

The utility model relates to a high pressure packing one-step filling tool which is used for oil filed filling and sand preventing. The technical proposal of the utility model is that the utility model is improved based on the primary suspension actuated releasing packer. The utility model comprises an upper connector, a hydraulic assembly, a fastening assembly, a sealing assembly, an anchoring spud assembly, a filling assembly, a closing mechanism, an actuated releasing mechanism and a lower connector. The utility model is characterized in that the upper part of the movable press ring is provided with a through hole; the filling central tube is passed through the upper connector and the lower connector; a back washing circular cavity is formed between the filling central tube, the salve connector and the central tube; the back washing circular cavity and the through hole of the lower taper body form a back washing channel; and filling cone positioned at the lower part of the lower taper body is provided with a filling cut, and the filling cut and the through hole of the filling central tube form a filling channel. The utility model effectively combines the sand filling and the craft structure of oil well back washing into one device based on the function of the primary suspension actuated releasing packer, thereby greatly increasing the working efficiency and reducing the construction process.

Description

High pressure packing primary filling instrument

One, technical field: the utility model is the underground work instrument that is used for oilfield filling, sand control.

Two, background technology: the disclosed Chinese patent ZL99219693.0 of the inventor " suspension back-off packer " is made up of top connection, locking assembly, seal assembly, grappling assembly, lower contact.The locking assembly comprises retaining mechanism, seat sealing mechanism, separates sealing mechanism and four parts of releasing gadget, wherein retaining mechanism is made up of central tube, lock ring, mobile pressure ring, lock ring sheath, lock ring is positioned at lock ring sheath and mobile pressure ring connection of thread, and lock ring is processed with internal thread and open slot and central tube upper external thread and is designed to single face zigzag step lock; The seat sealing mechanism is made up of mobile pressure ring, seat envelope shear pin, lock ring, lock ring sheath, and seat envelope shear pin is positioned at mobile pressure ring bottom, and lock ring sheath bottom and packing element join; Form releasing gadget by lock pawl, the shear pin of giving up, ball seat sliding sleeve and Supporting ring, the shear pin of giving up is positioned at lock pawl and lock ring sheath connecting part, lock pawl Lower Half threading and open slot and central tube internal thread be chain mutually, and lock pawl lower inner surface is equipped with a seat envelope and a Supporting ring, forms support in the lock pawl.Than traditional 756-6 type, 251 type packers bigger improvement has been arranged, but the problem that exists is the function that packer does not have pack gravel and backwash oil well.

Three, summary of the invention: the purpose of this utility model is the problem at the existing equipment function singleness, and functions such as locking, sealing, grappling and pack gravel, backwash oil well are effectively combined, and a kind of high pressure packing primary filling instrument is provided.

The technical scheme of taking for achieving the above object is: this instrument is to improve on the basis of former suspension back-off packer, and it comprises top connection, hydraulic pressure assembly, locking assembly, seal assembly, grappling assembly, filling assembly, closing organ, releasing gadget and lower contact composition.Wherein locking resistance assembly is made up of central tube 11, lock ring 10, mobile pressure ring 6, lock ring sheath 12, lock ring 10 is positioned at lock ring sheath 12 and mobile pressure ring 6 connection of thread, horse mouth screw thread and open slot in lock ring 10 is processed with, and form step lock with horse mouth screw thread that fishing joint 7 is provided with.The grappling assembly is made up of mobile pressure ring 6, shop bolt 9, lock ring 10, lock ring sheath 12, upper cone 20, slip insert 21 and lower cone 24.Shop bolt 9 is positioned at mobile pressure ring 6 bottoms, and lock ring sheath 12 bottoms join by upper isolating ring 14 and packing element 17, constitutes seal assembly.Separating sealing mechanism is made up of fishing joint 7, deblocking shear pin 13, central tube 11, lock ring 10.Fishing joint 7 bottoms and cooperate with central tube 11 top concave, convex between central tube 11 and lock ring 10, and the bottom is provided with outer lug boss and deblocking shear pin 13 holes, and there is the horse mouth screw thread that cooperates with lock ring 10 at the middle part.It is characterized in that: radially offer 2-5 through hole on the top of mobile pressure ring 6, in last lower contact 1,34, be penetrated with filling central tube 2, form a toroidal cavity between interior filling central tube 2 and fishing joint 7, the central tube 11, the bottom of lower cone 24 is lengthening cylinders, radially offer 2-5 through hole at cylinder, the outside of through hole has backwash ring 25 to be inserted in sealing, toroidal cavity upper and lower respectively with mobile pressure ring 6 inner chambers and lower cone 24 on through hole connect, form the backwash passage.Lower external thread at lower cone 24 connects filling tube 28, filling tube 28 lower internal thread connect connector 33, radially be provided with 2-5 filling mouth at filling tube middle part, in the bottom of filling mouth by connector 33 and central tube 11, in the toroidal cavity that filling tube 28 is formed sealing drum 35 and spring 32 are housed, in the close filling central tube 2 of lower contact 34, ball seat 29 is housed, interfix by steel pin nail 30 between ball seat 29 and the filling central tube 2, and on its contact surface, be provided with sealing ring 36, on filling central tube 2 close filling tube 28 filling mouth positions, be provided with the through hole with filling mouth equal number, form the filling passage.Between backwash ring 25 and filling tube 28, be with spring body 26 mutual supporting roles, realize the open and close of backwash passage.Ball seat 29 is cylindrical tubes, and its upper port is the arc sphere, forms with spheroid to be sealed and matched, and slides between lower cone and the filling central tube 2 to cooperate, and is provided with sealing ring 27 in its joint portion.Lower cone 24 upper internal threaded are connected with central tube 11 external screw threads, and lower inner surface and filling central tube 2 join, and by sealing ring 27 sealings, lower external face is connected with filling tube 28 inner surfaces.

Because the utility model has adopted above technical scheme, keeping on the function basis that hangs back-off packer, gravel pack and backwash oil well process structure effectively are combined in an instrument finish, thereby increase work efficiency greatly, reduce the construction operation program.

Four, description of drawings:

Accompanying drawing is a kind of overall structure schematic diagram of this utility model.1 is top connection among the figure, the 2nd, and filling central tube, the 3rd, piston exterior seal ring, the 4th, piston inner seal ring, the 5th, piston, the 6th, mobile pressure ring, the 7th, fishing joint, the 8th, sealing ring, the 9th, shop bolt, the 10th, lock ring, the 11st, central tube, the 12nd, lock ring sheath, the 13rd, deblocking shear pin, the 14th, upper isolating ring, the 15th, sealing ring, the 16th, sleeve, 17, the 18th, packing element, the 19th, lower isolating ring, the 20th, upper cone, the 21st, slip insert shell, the 22nd, slip insert, the 23rd, bow spring, the 24th, lower cone, the 25th, backwash ring, the 26th, spring body, 27 sealing rings, the 28th, filling tube, the 29th, ball seat sliding sleeve, 30 ball seat pins, the 31st, sealing drum, the 32nd, spring, 33 connectors, the 34th, lower contact.

Five, the specific embodiment:

Below in conjunction with the drawings and specific embodiments this utility model is described in detail.

The utility model is improved on the basis that hangs back-off packer, has mainly increased by two passages of gravel pack passage and backwash oil well.Form by top connection, locking assembly, seal assembly, grappling assembly, filling body, backwashing mechanism and lower contact.Top connection 1 internal thread and filling central tube 2 upper external thread are joined, and form an annular piston chamber.Through hole is offered near piston 5 places in filling central tube 2 tops, is communicated with piston chamber, and liquid enters piston chamber from filling central tube 2 by through hole.And then in the bottom of piston 5 is mobile pressure ring 6, and the middle part of mobile pressure ring 6 is provided with 3 through holes, and when mobile pressure ring 6 was moved down by piston 5 pressure effects, through hole was communicated with oil well casing.In the bottom of mobile pressure ring 6, be with fishing joint 7, and by shop bolt 9 with its relative fixed; Mobile pressure ring 6 lower external thread are connecting lock ring sheath 12, lock ring 10 between lock ring sheath 12 and fishing joint 7, and and fishing joint 7 between form horse mouth threaded engagement.Central tube 11 upper ends are connected with fishing joint 7 inner convex platforms, and the lower end is connected with lower cone 24 inner convex platforms.Be provided with an annular space between central tube 11 and the filling central tube 2, the upper end of annular space is communicated with oil well casing by the through hole on fishing joint 7 inner chambers, mobile pressure ring 6 inner chambers, the mobile pressure ring 6, and the lower end is communicated with through hole on the lower cone 24.Be with upper isolating ring 14, packing element 17 and 18, lower isolating ring 19, upper cone 20, slip insert shell 21, slip insert 22 and lower cone 24 successively in the bottom of lock ring sheath 12, in last lower isolating ring 14 and 19, packing element 17 and 18, be with sleeve 16.Being with backwash ring 25 outside lower cone 24, is spring body 26 below the backwash ring 25, under the normal condition backwash ring 25 under spring body 26 effects with 3 through hole shutoff on the lower cone 24.The following filling tube 28 that connecting of spring body 26.The bottom outer wall of filling tube 28 upper inside wall and lower cone 24 joins, lower internal thread is connected on the connector 33, spring 32 and sealing drum 31 are equipped with in the chamber within it, and the middle part barrel is radially offered 3 through holes on the filling tube, and the through hole of this through hole and filling central tube 2 bottoms connects.Be with ball seat sliding sleeve 29 in the bottom of filling central tube 2, interfixed by ball seat pin 30 with filling central tube 2, spheroid (not drawing among the figure) is landed on the ball seat sliding sleeve 29, and with 29 shutoff of ball seat sliding sleeve.Connector 33 internal threads are connected in the lower contact 34.

The utility model course of work is: instrument down to design attitude, putting into a spheroid in the filling central tube 2 is landed on the ball seat sliding sleeve 29, suppressing the 5-6 MPa from top connection 1 acts on the piston 5, promote mobile pressure ring 6 behind piston 5 pressurizeds, mobile pressure ring 6 relative fishing joints 7 move down, and at this moment shop bolt 9 is cut off, slip insert shell 21 is pushed out and firmly is stuck on the oil well casing inwall, it is descending to continue to suppress piston 5 continuation, and with packing element 17 and 18 spreadings, the oil well casing annular space is sealed.The ball seat pin 30 that continues to boost is cut off, ball seat sliding sleeve 29 glides, at this moment filling central tube 2 is ganged up with oil well casing, filling central tube 2 internal pressures reduce to zero, owing to be connected for the gingival cyst of mucous gland in the newborn button between lock ring 10 and the fishing joint 7, make packing element 17 and 18 be enclosed in the oil well casing annular space firmly, just finished the seat envelope of instrument this moment and opened the back-up sand passage.Inject load fluid in suppressing from top connection 1 then, the filling oil reservoir after stowing pressure reaches certain value, stops to inject load fluid.At this moment, change in oil well casing and suppress injection liquid, behind the through hole of liquid by mobile pressure ring 6 and lower cone 24, oppositely enter into filling central tube 2 from the through hole of filling tube 28, so process develops gravels in the filling central tube 2.Stop to suppress after flushing is finished, the backwash ring moves the backwash pathway closure under the effect of spring body 26 25.After operation is finished, on carry tubing string, top connection 1 and filling central tube are poured out from connector 33, sealing drum 31 moves the filling passage of closing filling tube 28, the operation of finishing filling and putting sand control pipe aside under the effect of spring 32.During fishing tool, fishing string is lowered into fishing joint 7, after the lifting fishing joint 7, deblocking shear pin 13 is cut off, and slip insert shell 21 and packing element 17,18 discharge automatically, instrument can be proposed oil well, finish whole operations.

Claims

1, high pressure packing primary filling instrument comprises top connection, hydraulic mechanism, locking assembly, seal assembly, slip insert grappling assembly, lower contact composition; The locking assembly comprises retaining mechanism, the seat sealing mechanism, separate four parts of sealing mechanism and releasing gadget, wherein retaining mechanism is by central tube (11), lock ring (10), mobile pressure ring (6), lock ring sheath (12) is formed, lock ring (10) is positioned at lock ring sheath (12) and mobile pressure ring (6) connection of thread, horse mouth screw thread and open slot in lock ring (10) is processed with, and the horse mouth screw thread that is provided with fishing joint (7) forms step lock, the seat sealing mechanism is by mobile pressure ring (6), shop bolt (9), lock ring (10), lock ring sheath (12), upper cone (20), slip insert shell (21) and lower cone (24) are formed, shop bolt (9) is positioned at mobile pressure ring (6) bottom, and lock ring sheath (12) bottom and packing element join; Separating sealing mechanism is made up of fishing joint (7), deblocking shear pin (13), central tube (11), lock ring (10), fishing joint (7) is positioned between central tube (11) and the lock ring (10), and cooperate with central tube (11) top concave, convex, the bottom is provided with outer lug boss and deblocking shear pin (13) hole; It is characterized in that: in last lower contact (1,34) be penetrated with filling central tube (2), form a toroidal cavity between interior filling central tube (2) and the central tube (11), the bottom of lower cone (24) is the lengthening cylinder, radially offer 2-5 through hole at cylinder, the outside of through hole has backwash ring (25) to be inserted in sealing, on the toroidal cavity, down respectively with mobile pressure ring (6) inner chamber and lower cone (24) on through hole connect, lower external thread at lower cone (24) connects filling tube (28), filling tube (28) lower internal thread connects connector (33), radially be provided with 2-5 filling mouth at filling tube middle part, in the bottom of filling mouth by connector (33) and central tube (11), in the toroidal cavity that filling tube (28) is formed sealing drum (35) and spring (32) are housed, in the close filling central tube (2) of lower contact (34), ball seat (29) is housed, interfix by steel pin nail (30) between ball seat (29) and the filling central tube (2), and be provided with sealing ring (36) on its contact surface on close filling tube (28) the filling mouth position of filling central tube (2), be provided with through hole with filling mouth equal number, between backwash ring (25) and filling tube (28), be with spring body (26) supporting role mutually, radially offer 2-5 through hole on the top of mobile pressure ring (6).

2, high pressure packing primary filling instrument according to claim 1, it is characterized in that: ball seat (29) is a cylindrical tube, and its upper port is the arc sphere, forms with spheroid to be sealed and matched, slide between lower cone and the filling central tube (2) and cooperate, and be provided with sealing ring (27) in its joint portion.

3, high pressure packing primary filling instrument according to claim 1 is characterized in that: the bottom of lock ring sheath (12) joins by upper isolating ring (14) and cartridge (17).