CN208152979U - A kind of bi-directional slip formula external casing packer - Google Patents

A kind of bi-directional slip formula external casing packer Download PDF

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Publication number
CN208152979U
CN208152979U CN201721646881.XU CN201721646881U CN208152979U CN 208152979 U CN208152979 U CN 208152979U CN 201721646881 U CN201721646881 U CN 201721646881U CN 208152979 U CN208152979 U CN 208152979U
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China
Prior art keywords
slips
ontology
rubber plug
packer
impeller
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CN201721646881.XU
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Chinese (zh)
Inventor
杨海波
吴柳根
张建国
冯德杰
李国峰
曹成章
王绍先
唐明
李伟
侯婷
陶剑
路志平
马丁
饶鸿飞
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Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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Abstract

A kind of bi-directional slip formula external casing packer involved in the utility model, including components such as ontology, outer sleeve, rubber plug seat, rubber plug, slip mechanism, packer bodies, outer sleeve and ontology sealing cooperate, and outer sleeve lower part is sequentially connected upper slips mechanism, packer body and lower slips mechanism.When operation, rubber plug is replaced to rubber plug seat, strip groove downlink of the outer sleeve with rubber plug seat and rubber plug on ontology, and when closing piece comes downwards to the strip groove lower end of ontology, upper slips mechanism, lower slips mechanism complete two-way seat and hang, and packer body realization is set.The utility model is hung by the two-way seat of slip mechanism and sealing mechanism sets and realizes that stable seat is hung and sealed, it solves annular space and seals problem, especially suitable for being difficult to realize annular mechanical sealing problem when deep-well fraclional well cementing operation, leakage risk when deep-well long well section fraclional well cementing is effectively reduced.

Description

A kind of bi-directional slip formula external casing packer
Technical field
The present invention relates to drilling well, well cementation, completion tool fields, insulate more particularly to outside a kind of bi-directional slip formula casing Device.
Background technique
With the development of drilling technology, the Holes of Complicated Wells such as deep-well, directional well, high angle hole gradually increase, and cementing technology faces Bigger challenge and difficulty.Fraclional well cementing technology is to install a kind of special well cementation work in a certain setting position of well inner sleeve tubing string Has stage cementing device, by special process to stage cementing device upper and lower part well section casing annulus annular space point when well cementation It does not cement the well, realizes and longer cement packing well section is divided into two sections of progress sealing.Fraclional well cementing is primarily adapted for use in disposably Cementing interval isolation is too long, low pressure and easy leaking loses well, upper and lower well section excessive temperature differentials, petroleum distribution are discontinuous and spacing distance is too long etc. Well cementing operation under the conditions of hole condition.
Currently, external packer of pipe is mainly by fill-type packer, compression packer, heat-sensitive type packer and self-expansion type The several types such as packer realize downhole packer and bridge blinding for complicated oil, gas and water casing and stratum annular space, main to use In being in charge of in completion practice.Fill-type packer is mainly used for single-stage well cementation formula stowing pulp or cement slurry realizes annular space packing Device, such as a kind of tool of cement paste expansion sealing tube external packer auxiliary cement well of CN201236667Y publicity;Compression packer master It is used for the screen casing sectional well completion operation of non-heavy crude heat extraction, mode is suppressed by piping tool in tripping in and compresses packing element realization wellbore envelope Every purpose, such as a kind of Multilevel compressive extro-pipe packer used for segmented completion of horizontal well of CN201581856U publicity;Heat-sensitive type envelope It is mainly used for thermal production well sectional well completion every device, is expanded by the expanding material that vapor (steam) temperature keeps it internal, pushes sealant Cylinder deformation blocks annular space, such as a kind of viscous crude sectional well completion self-expanding external packer of pipe of CN205225170U publicity;Self-expanding Formula packer is then, chance water automatic expansion offer Inter-zonal packing oily by rubber material chance after well cementation, but its sealability is limited, Such as a kind of chance water self-expanding external packer of pipe of CN204532229U publicity.
Since part oil/gas well target zone buries relatively deep, disposable sealing naked eye segment length, well cementing operation annular space head of liquid Height is easily more than Formation bearing pressure and misses;Even if using fraclional well cementing technology, for there are more set pressure series of strata systems The wellbore of system, deep-well fraclional well cementing are still difficult to avoid that leakage accident occurs.It various is mechanically and hydraulically acted on however, existing External packer of pipe is difficult to and stage well cementing tool and process matching use, heat-sensitive type and Self-expanding packer adaptability and sealing Ability is limited, it is difficult to meet annular mechanical seal request when fraclional well cementing operation.Therefore, it researches and develops a kind of suitable for fraclional well cementing The external packer of pipe of operation has highly important meaning to improving deep-well fraclional well cementing annular space packing ability and reducing leakage risk Justice.
Summary of the invention
The present invention is directed to the above-mentioned technical problem in the presence of the prior art, proposes a kind of bi-directional slip formula casing covering Every device, casing annulus is insulated when especially suitable for two-stage cementing operation, rubber plug in place after, hung up down by hydraulic drive seat Slip mechanism, and packer body is set, it realizes that bi-directional slip is sat and hangs, packer setting insulates casing annulus, and it is solid to reduce deep-well Well construction misses risk, enhances the packing effect of casing annulus.
The technical scheme is that:
A kind of bi-directional slip formula external casing packer including ontology and is sleeved on this external outer sleeve, slip mechanism, envelope Every mechanism and it is sleeved on intrinsic rubber plug seat, rubber plug;Wherein:
The slip mechanism is made of upper slips mechanism and lower slips mechanism;Upper slips mechanism is connected under outer sleeve End, including upper slips, upper slips impeller, thrust ring and upper slips matching piece;Lower slips mechanism includes that lower slips, lower slips push away Moving part and lower slips matching piece;It is machined with positive slip insert on upper slips, inverted slips tooth, upper slips are machined on lower slips tooth Impeller and lower slips impeller are machined with trapezoidal fit key, and upper slips and lower slips are machined with slips occlusion key, upper card Watt and the cooperation of upper slips impeller, lower slips and the cooperation of lower slips impeller, lower slips matching piece is fixedly connected with ontology;
The packer body is formed by two along the symmetrical packing units of falling-resistant ring, and each packing units include sealant Cylinder, plow-shape part, subring and Z-shaped resistor, plow-shape part one end are machined with tapered ramp, and cartridge one end is located at the oblique of plow-shape part It on face, is coated and fixed by Z-shaped resistor, the other end is fixed by falling-resistant ring, and falling-resistant ring is the annulus knot of trapezoidal outer bell mouth shape Structure, by cartridge end restraint in the trapezoidal annulus of falling-resistant ring;Subring is fixed by a pin to outside plow-shape part, simultaneously Subring fixes Z-shaped resistor;
The packer body by plow-shape part respectively with the upper slips impeller of upper slips mechanism and lower slips mechanism Lower slips impeller is connected between upper slips mechanism and lower slips mechanism;
Rubber plug seat is mounted on body interior, and rubber plug seat is tubular structure, and top is machined with closing piece hole, and lower part is machined with rubber plug Set inclined-plane, the strip groove penetrated be axially machined on ontology, be machined with interior sliding groove in outer sleeve, closing piece hole, strip groove and Interior sliding groove and closing piece cooperation will be fixed between rubber plug seat, ontology and outer sleeve, and rubber plug seat and outer sleeve and ontology pass through bar shaped Cooperation is slided in slot limit, sealing.
Above scheme further comprises:
Body exterior is equipped with righting cylinder, and righting cylinder is circular ring structure, and outer surface is machined with wiper block and diversion trench.
Between outer sleeve and ontology, between upper slips impeller and ontology, between lower slips impeller and ontology, subring It is fixedly connected by pin between plow-shape part.
Sealing ring is mounted in ontology strip groove upper and lower side, rubber plug seat lower part, plow-shape part.
Ontology is ordinary casing pipe nipple, and one end is equipped with box cupling, and the other end is threaded.
When bi-directional slip formula external casing packer operation of the invention, well cementing operation is first carried out, rubber plug is replaced to rubber plug seat Afterwards, the pin shearing between outer sleeve and ontology, under hydraulic action, strip groove of the outer sleeve with rubber plug seat and rubber plug on ontology Downlink, outer sleeve pushes upper slips matching piece downlink, and promotes upper slips downlink, so that slips occlusion key and trapezoidal fit key edge The inclined-plane sliding of upper slips impeller, when upper slips matching piece, which comes downwards to thrust groove and thrust ring, to be contacted, upper slips are realized It sits and hangs;Plow-shape part is under thrust ring and the effect of upper slips impeller, and the pin between subring and plow-shape part is sheared, plow-shape part Beveled end is moved along ontology to falling-resistant ring, and plow-shape part enters cartridge inner surface, is pushed into plow-shape part so that cartridge be squeezed Outer surface, falling-resistant ring and Z-shaped resistor ensure that cartridge both ends are fixed, and cartridge realizes swollen envelope, and then lower slips impeller It pushes lower slips to sit to hang.When closing piece comes downwards to the strip groove lower end of ontology, upper slips mechanism, lower slips mechanism complete two-way seat It hangs, packer body realization is set.
The advantage of the invention is that:Bi-directional slip formula external casing packer is hung by the two-way seat of slip mechanism and sealing mechanism It sets and realizes that stable seat is hung and sealing, the two-way seat of slips ensure that tool is stable, legibility is not hung after hanging;Cooperate stage cementing device Two-stage cementing operation can be carried out, annular space is solved and seals problem, especially suitable for being difficult to realize annular space when deep-well fraclional well cementing operation Mechanical seal problem effectively reduces leakage risk when deep-well long well section fraclional well cementing.
Detailed description of the invention
Fig. 1 is bi-directional slip formula external casing packer structural schematic diagram;
Fig. 2 is the structural schematic diagram after bi-directional slip formula external casing packer is set;
Fig. 3 is that upper slips mechanism sits extension pre-structure schematic diagram;
Fig. 4 is that upper slips mechanism sits structural schematic diagram after extension;
Fig. 5 is that packer body sets pre-structure schematic diagram;
Fig. 6 is that packer body sets rear structural schematic diagram;
Fig. 7 is Section A-A figure in Fig. 1;
Fig. 8 is section B-B figure in Fig. 1
Identical component is indicated by identical appended drawing reference in the figure, and attached drawing is not drawn to scale.
In figure:1. box cupling, 2. ontologies, 3. righting cylinders, 4. outer sleeves, 5. rubber plug seats, 6. rubber plugs, 7. upper slips mechanisms, 8. Packer body, 9. lower slips mechanisms, 10. screw threads, 11. sealing rings, 12. pins, 201. strip grooves, 301. wiper blocks, in 401. Sliding groove, 501. closing pieces, 502. closing piece holes, 701. upper slips, 702. upper slips impellers, 703. thrust rings, 704. upper slips Matching piece, 705. slip inserts, 706. thrust grooves, 707. trapezoidal fit keys, 708. slips occlusion key, 801. cartridges, 802. Plow-shape part, 803. subrings, 804. falling-resistant rings, 805.Z form drag part, 901. lower slips, 902. lower slips impellers block on 903. Watt matching piece.
Specific embodiment
Now in conjunction with Figure of description, the invention is further described.
As shown in Fig. 1~2, a kind of bi-directional slip formula external casing packer, mainly include box cupling 1, ontology 2, righting cylinder 3, The components such as outer sleeve 4, rubber plug seat 5, rubber plug 6, slip mechanism, packer body 8.Ontology 2 is ordinary casing pipe nipple, and one end is equipped with Box cupling 1, top are machined with strip groove 201, and the other end is threaded 10;Outer sleeve 4 and the sealing of ontology 2 cooperate, under outer sleeve 4 Portion is sequentially connected upper slips mechanism 7, packer body 8 and lower slips mechanism 9, and rubber plug seat 5 is located at the strip groove 201 inside ontology 2 Place.
As shown in figures 1-4, slip mechanism includes that upper slips mechanism 7 and lower slips mechanism 9 are constituted, and is located at packing machine The both ends of structure 8.Upper slips mechanism 7 includes upper slips 701, upper slips impeller 702, thrust ring 703, upper slips matching piece 704; Lower slips mechanism 9 includes lower slips 901, lower slips impeller 902, lower slips matching piece 903.It is machined with just on upper slips 701 To slip insert 705, inverted slips tooth is machined on lower slips tooth 901, upper slips impeller 702 and lower slips impeller 902 are equal It is machined with trapezoidal fit key 707, upper slips 701 and lower slips 901 are machined with slips occlusion key 708, upper slips 701 and upper card Watt impeller 702 cooperates, and lower slips 901 and lower slips impeller 902 cooperate;Upper slips 701 and upper slips matching piece 704 it Between, pass through groove, protrusion occlusion anticreep between lower slips 901 and lower slips matching piece 903 respectively.In upper slips matching piece 704 It is machined with thrust groove 706, thrust ring 703 is located in thrust groove 706, and lower slips matching piece 903 is connected by screw thread with ontology 2.
As shown in Fig. 5~6, packer body 8 is installed on outside ontology 2 between upper slips mechanism 7 and lower slips mechanism 9 Surface is formed by two along the symmetrical packing units of falling-resistant ring 804, and each packing units include cartridge 801, plow-shape part 802, the components such as subring 803, Z-shaped resistor 805,801 one end of cartridge are located on the inclined-plane of plow-shape part 802, pass through Z-shaped resistance Part 805 is coated and fixed, and the other end is fixed by falling-resistant ring 804.Subring 803 is fixed on outside plow-shape part 802 by pin 12, Subring 803 is fixed by Z-shaped resistor 805 simultaneously.
As shown in fig. 7, the top of bi-directional slip formula external casing packer is equipped with righting cylinder 3, righting cylinder 3 is annulus knot Structure is machined with wiper block 301, and 301 quantity of wiper block can be 8-10, prevents the abrasion when entering well of cartridge 801, wiper block It is machined with diversion trench between 301, increases circulation canal after well.
As shown in Fig. 2,8, rubber plug seat 5 is installed inside bi-directional slip formula external casing packer, rubber plug seat 5 is tubular knot Structure, top are machined with closing piece hole 502, and lower part is machined with rubber plug 6 and sets inclined-plane, and the strip groove 201 penetrated is machined on ontology 2, Interior sliding groove 401 is machined in outer sleeve 4, fixed by closing piece 501 between rubber plug seat 5, ontology 2 and outer sleeve 4, rubber plug seat 5 It can be under external force along 2 strip groove of ontology, 201 downlink, closing piece hole 502, strip groove 201 and interior sliding groove 401 with outer sleeve 4 Quantity is identical, and quantity can be 6-8.
As shown in Fig. 1~2, the bi-directional slip formula external casing packer passes through between 4 lower end of outer sleeve and ontology 2 Pin 12 is fixedly connected, and upper slips impeller 702 and lower slips impeller 902 are fixedly connected by pin 12 with ontology 2, is assisted Ring 803 is fixedly connected by pin 12 with plow-shape part 802;Ontology 2 is at 201 both ends of strip groove, 5 lower part of rubber plug seat, plow-shape part 802 Equal positions are mounted on sealing ring 11.
In the embodiment of a fraclional well cementing operation, the work of bi-directional slip formula casing packer is described according to Fig. 1 to 8 Industry process.
After bi-directional slip formula external casing packer enters well, first implement level-one well cementing operation, investment rubber plug 6 is replaced to rubber plug seat After 5, under hydraulic action, the pin 12 between outer sleeve 4 and ontology 2 is sheared, and outer sleeve 4 is with rubber plug seat 5 and rubber plug 6 along ontology 2 On 201 downlink of strip groove, outer sleeve 4 push 704 downlink of upper slips matching piece, upper slips 701 also stress downlink along upper card The inclined-plane sliding of watt impeller 702, the displacement so that slips occlusion key 708 and trapezoidal fit key 707 are staggered, upper slips 701 Outer diameter incrementally increases, when upper slips matching piece 704 comes downwards to 703 contact position of thrust groove 706 and thrust ring, upper slips 701 It realizes to sit and hang.
After upper slips mechanism 7 sits and hangs, the packing units on 8 top of packer body are first set, and plow-shape part 802 is in thrust ring 703 and under upper slips impeller 702 acts on, pin 12 between subring 803 and plow-shape part 802 is sheared, plow-shape part 802 it is oblique Face end is moved along ontology 2 to falling-resistant ring 804, and plow-shape part 802 enters 801 inner surface of cartridge, so that cartridge 801 be squeezed It is pushed into 802 outer surface of plow-shape part, falling-resistant ring 804 and Z-shaped resistor 805 ensure that 801 both ends of cartridge are fixed, and upper packing units are complete At setting, lower packing units are set using same way realization.
After the completion of packer body 8 is set, upper slips mechanism 7 and packer body 8 continue outside ontology 2 under thrust Surface downlink, and then lower slips impeller 902 pushes lower slips 901 to sit extension.When closing piece 501 comes downwards to the strip groove 201 of ontology 2 When lower end, upper slips mechanism 7, lower slips mechanism 9 complete two-way seat and hang, and the realization of packer body 8 is set.
Bi-directional slip formula external casing packer above-mentioned, the closing piece 501 on rubber plug seat 5(Equivalent 12 structure of pin)If Fixed suitable shear pressure, can build the pressure shearing after well cementation and packer setting operation, and rubber plug 6 and rubber plug seat 5 are pushed into Artificial bottom of a well, realization exempt to bore plug operation.
The present invention can be used for casing annulus packing, and cooperation stage cementing device can carry out two-stage cementing operation, pass through upper card Watt mechanism 7, the two-way seat of lower slips mechanism 9 are hung and sealing mechanism 8 sets and realizes that stable seat is hung and sealing, and deep-well, classification are solved Problem of the annular mechanical sealing to cause annular space to miss is difficult to realize when the special operations such as well cementation, when effectively improving fraclional well cementing Annular space insulates effect and bearing capacity, greatly reduces leakage risk when deep-well long well section fraclional well cementing.

Claims (5)

1. a kind of bi-directional slip formula external casing packer including ontology (2) and is sleeved on outer sleeve (4), the slips of ontology (2) outside Mechanism, packer body (8) and the rubber plug seat (5) being sleeved in ontology (2), rubber plug (6);It is characterized in that:
The slip mechanism is made of upper slips mechanism (7) and lower slips mechanism (9);Upper slips mechanism (7) is connected to housing Cylinder (4) lower end, including upper slips (701), upper slips impeller (702), thrust ring (703) and upper slips matching piece (704);Under Slip mechanism (9) includes lower slips (901), lower slips impeller (902) and lower slips matching piece (903);On upper slips (701) It is machined with positive slip insert (705), inverted slips tooth, upper slips impeller (702) and lower card is machined on lower slips tooth (901) Watt impeller (902) is machined with trapezoidal fit key (707), and upper slips (701) and lower slips (901) are machined with slips occlusion Key (708), upper slips (701) and upper slips impeller (702) cooperation, lower slips (901) and lower slips impeller (902) are matched It closes, lower slips matching piece (903) is fixedly connected with ontology (2);
The packer body (8) is formed by two along the symmetrical packing units of falling-resistant ring (804), and each packing units include close Sealing cylinder (801), plow-shape part (802), subring (803) and Z-shaped resistor (805), plow-shape part (802) one end are machined with wedge-shaped oblique Face, cartridge (801) one end are located on the inclined-plane of plow-shape part (802), are coated and fixed by Z-shaped resistor (805), and the other end is logical It crosses falling-resistant ring (804) to fix, falling-resistant ring (804) is the circular ring structure of trapezoidal outer bell mouth shape, about by cartridge (801) end Beam is in the trapezoidal annulus of falling-resistant ring (804);Subring (803) is fixed on plow-shape part (802) outside by pin (12), simultaneously Subring (803) is fixed by Z-shaped resistor (805);
The packer body (8) by plow-shape part (802) respectively with the upper slips impeller (702) of upper slips mechanism (7) and The lower slips impeller (902) of lower slips mechanism (9) is connected between upper slips mechanism (7) and lower slips mechanism (9);
Rubber plug seat (5) is mounted on ontology (2) inside, and rubber plug seat (5) is tubular structure, and top is machined with closing piece hole (502), under Portion is machined with rubber plug (6) and sets inclined-plane, and the strip groove (201) penetrated, processing in outer sleeve (4) are axially machined on ontology (2) Have interior sliding groove (401), closing piece hole (502), strip groove (201) and interior sliding groove (401) and closing piece (501) cooperate rubber plug Fixed between seat (5), ontology (2) and outer sleeve (4), rubber plug seat (5) and outer sleeve (4) and ontology (2) pass through strip groove (201) Cooperation is slided in limit, sealing.
2. bi-directional slip formula external casing packer as described in claim 1, it is characterised in that:Righting is equipped with outside ontology (2) Cylinder (3), righting cylinder (3) are circular ring structure, and outer surface is machined with wiper block (301) and diversion trench.
3. bi-directional slip formula external casing packer as claimed in claim 1 or 2, it is characterised in that:Outer sleeve (4) and ontology (2) between, between upper slips impeller (702) and ontology (2), between lower slips impeller (902) and ontology (2), subring (803) it is fixedly connected by pin between plow-shape part (802).
4. bi-directional slip formula external casing packer as claimed in claim 3, it is characterised in that:In ontology (2) strip groove (201) Upper and lower side, rubber plug seat (5) lower part, plow-shape part (802) are mounted on sealing ring (11).
5. bi-directional slip formula external casing packer as claimed in claim 4, it is characterised in that:Ontology (2) is that ordinary casing is short Section, one end are equipped with box cupling (1), and the other end is threaded (10).
CN201721646881.XU 2017-12-01 2017-12-01 A kind of bi-directional slip formula external casing packer Active CN208152979U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721646881.XU CN208152979U (en) 2017-12-01 2017-12-01 A kind of bi-directional slip formula external casing packer

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Application Number Priority Date Filing Date Title
CN201721646881.XU CN208152979U (en) 2017-12-01 2017-12-01 A kind of bi-directional slip formula external casing packer

Publications (1)

Publication Number Publication Date
CN208152979U true CN208152979U (en) 2018-11-27

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