CN208669259U - A kind of novel underseal drag fracturing packer of horizontal well - Google Patents
A kind of novel underseal drag fracturing packer of horizontal well Download PDFInfo
- Publication number
- CN208669259U CN208669259U CN201821862245.5U CN201821862245U CN208669259U CN 208669259 U CN208669259 U CN 208669259U CN 201821862245 U CN201821862245 U CN 201821862245U CN 208669259 U CN208669259 U CN 208669259U
- Authority
- CN
- China
- Prior art keywords
- valve core
- central tube
- ring
- top connection
- balance valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model belongs to oil exploration equipment, in particular to a kind of novel underseal drag fracturing packer of horizontal well.The technical problem to be solved by the present invention is to provide a kind of novel underseal drag fracturing packers of horizontal well, top connection is connect with balance valve core, upper outer cylinder both ends are connect with top connection pressure ring, central tube respectively, and steel ball, ball seat are equipped in balance valve core, is connect with V-seal component, sealing shroud；Top connection, balance valve core are located at top connection pressure ring, in upper outer cylinder；Central tube lower part is equipped with J-type slot, and center tube outer surface is successively arranged with packing element, retaining ring, cone, anchor mechanism, pin ring, pin, righting mechanism, and guide shoe is connected to the lower end of righting mechanism, and pressure cap is connected to central tube lower end.The utility model proposes the novel underseal drag fracturing packer of horizontal well, there is sand-proof function, solve the problems, such as that tool can not unseal caused by packer two-way pressure is uneven, effectively prevent into the wear problem for being inserted into sealing during well.
Description
Technical field
The utility model belongs to oil exploration equipment, in particular to a kind of to be suitable for oilfield horizontal well staged fracturing, oil reservoir
The novel underseal drag fracturing packer of the horizontal well of water detection operation.
Background technique
With the fast development of horizontal well drilling technology, horizontal well volume fracturing technology has become unconventional coal bed gas, page
The technical way that rock gas, fine and close oil-gas mining and conventional gas and oil increase production.Horizontal well abrasive perforating drag fracturing is as a kind of
Typical technique can once enter well and complete more shower holes, multistage pressure break, realize perforation, fracturing integrated, greatly improve
Pressing crack construction efficiency.
Chinese utility model patent specification CN202325383U publication date is to disclose a kind of level on July 11st, 2012
Well drag fracturing packer, this drag fracturing packer for horizontal well include connector, central tube, cone, whole slips, friction
Body, top connection are threadedly coupled with central tube, and whole slips is connect with lower sand control external threading, and friction piece is threadedly coupled with reversing cover,
It is fixed between cone and central tube by shear pin, reversing cover is mounted on lower sand control and puts on, upper pressing sleeve, lower pressing sleeve, upper packing element, middle glue
Cylinder, lower rubber cylinder, spacer ring cover on packing element axis, and small packing element is packed into upper pressing sleeve locking, whole slips and upper sand control set, lower sand control set group
At sand control mechanism, and piece cover is on central tube.The shortcomings that this packer, is: packing element poor sealing effect, reusable rate
It is low；Sand is accumulated in tool, causes tool sand card, and tool is caused to can not be successfully commutation, pressing crack construction low efficiency.
Chinese invention patent specification CN104373075B publication date is that a kind of pressure break packing is disclosed on April 12nd, 2017
Device, this fracturing packer include top connection, and lower end is equipped with sealed packing；Central tube, the upper end are connected in top connection, in
Cylinder sleeve, anchor mechanism and packing element central tube are arranged on heart pipe, the upper end of anchor mechanism is connected with upper cylinder sleeve, lower end and glue
Cylinder central tube is connected, and packing element central tube is connected on central tube by central tube shear pin, is arranged with glue on packing element central tube
Cylinder and leather cup assembly, packing element are folded between anchor mechanism and leather cup assembly；Lower contact, the upper end are connected under central tube
End, the outside of lower contact is arranged by housing shear pin is connected with housing, and the upper end of housing is connected with cone, cone and leather cup
Assembly matches, and the inside of lower contact is worn by seat shear pin nail is connected with ball seat.The shortcomings that this packer, is: packing element
Poor sealing effect, reusable rate are low；Pressure difference is uneven up and down for packer after pressure break, causes tool deblocking difficult；Sand exists
Accumulation causes tool sand card in tool, and tool is caused to can not be successfully commutation.
Utility model content
In view of the problems of the existing technology the utility model makes improvements, i.e. the technical problems to be solved in the utility model
It is to provide a kind of novel underseal drag fracturing packer of horizontal well.
In order to solve the above technical problems, the utility model provides a kind of novel underseal drag fracturing packer of horizontal well,
Including top connection, top connection pressure ring, upper outer cylinder, balance valve core, V-seal component, sealing shroud, central tube, packing element, retaining ring, cone
Body, pressure cap, guide shoe；
The top connection is connect with balance valve core, and the upper outer cylinder both ends are connect with top connection pressure ring, central tube respectively, institute
It states inner wall, upper outer cylinder lower inner wall in the middle part of central tube and is equipped with T stage rank, steel ball, ball seat are equipped in the balance valve core, it is described
V-seal component is set on balance valve core lower end, and the sealing shroud is connected on balance valve core lower end and by V-seal component
It is fixed；The top connection, balance valve core are located at top connection pressure ring, in upper outer cylinder；
The central tube lower part is equipped with J-type slot, and the packing element, retaining ring are sequentially sleeved at the middle part of central tube, the cone
It is connected to center tube outer surface, packing element, retaining ring are fixed on central tube by upper outer cylinder, cone；The central tube lower part
Outer surface is equipped with anchor mechanism, pin ring, pin, righting mechanism, and the guide shoe is connected to the lower end of righting mechanism, the pressure
Cap is connected to the lower end of central tube.
Top connection upper end is equipped with centralizer wing as a further improvement of the utility model,.
As a further improvement of the utility model, balance valve core, be equipped with backwash channel on upper outer cylinder.
The inner cavity of top connection pressure ring is concentric Hexagon hole, top connection lower end as a further improvement of the utility model,
Outer surface cooperates with concentric Hexagon hole, prevents outer cylinder from mutually rotating with balance valve core.
Balance valve core includes valve core, circlip, lock pin, spring, clamp screw as a further improvement of the utility model,
Nail, valve core are equipped with hole and through-hole, and lock pin and spring are installed in hole, and balance valve core can be locked in upper outer by lock pin and spring
Intracavitary in cylinder upper end, circlip is mounted on the interior intracavitary of valve core, installs holding screw in through-hole, holding screw can be by balanced valve
Core, ball seat are fixed, and prevent the two from mutually rotation occurs.
Anti- sand launder is equipped in J-type slot as a further improvement of the utility model,.
Anchor mechanism includes slips, slips clamp ring, spring, slip spider, slips as a further improvement of the utility model,
Cover for seat, slip spider are fixed on the outer surface of central tube, and slips is laminated structure, and slips upper end outer surface is equipped with unidirectional tooth, single
Teeth directional to tooth is downward, and groove is equipped in the middle part of slips, and spring is mounted in groove, and slips is solid by slips clamp ring and slips cover for seat
It is scheduled on slip spider.
Righting mechanism includes strigil ontology, upper fixed ring, probe claw, arch as a further improvement of the utility model,
Spring, lower fixed ring, semielliptic spring are fixed on probe claw, are equipped with groove in the middle part of strigil body outer surface, probe claw passes through upper fixation
Ring and lower fixed ring are fixed in groove, and strigil ontology both ends are connect with slips cover for seat lower end, righting cylinder upper end respectively.
The utility model proposes the novel underseal drag fracturing packer of horizontal well, operate conveniently, securely and reliably, it is efficiently real
With can not only be realized by put-on and delegated oil pipe and set, unseal, moreover it is possible to utilize the sand control structure of central tube, realize sand control function
Can, the tool caused by packer two-way pressure is uneven after pressure break that can effectively solve can not unseal problem, can effectively prevent into well
It is inserted into the wear problem of sealing in the process, it is ensured that packer is once gone into the well multiple pressure break.
Detailed description of the invention
Fig. 1 is that the novel underseal drag fracturing packer of the utility model horizontal well enters well construction schematic diagram.
Fig. 2 is that the novel underseal drag fracturing packer of the utility model horizontal well sets status diagram.
Fig. 3 is the plane outspread drawing of central tube length slot.
Fig. 4 is balance valve core locking mechanism structural schematic diagram.
Fig. 5 is top connection pressure ring cross-sectional view.
It is as shown in the figure: 1- top connection, 2- top connection pressure ring, the upper outer cylinder of 3-, 4- balance valve core, 5- steel ball, 6- ball seat, 7-V
Type seal assembly, 8- sealing shroud, 9- central tube, 10- packing element, 11- retaining ring, 12- cone, 13- slips, 14- slips clamp ring, 15-
Spring, 16- slip spider, 17- slips cover for seat, 18- pin ring, 19- pin, 20- strigil ontology, the upper fixed ring of 21-, 22- are visited
Fixed ring, 25- righting cylinder, 26- pressure cap, 27- guide shoe, 28- centralizer wing, 41- circlip, 42- lock under pawl, 23- semielliptic spring, 24-
Pin, 43- spring, 44- holding screw, the anti-sand launder of 111-.
Specific embodiment
Utility model is further described in detail with reference to the accompanying drawings and examples.
The novel underseal drag fracturing packer of horizontal well in the present embodiment, as shown in Figure 1, the device includes including above connecing
First 1, top connection pressure ring 2, upper outer cylinder 3, balance valve core 4, V-seal component 7, sealing shroud 8, central tube 9, packing element 10, retaining ring 11,
Cone 12, pressure cap 26, guide shoe 27；Top connection 1 is connect with balance valve core 4, and 1 upper end of top connection is equipped with centralizer wing 28,3 liang of upper outer cylinder
End is connect with top connection pressure ring 2, central tube 9 respectively, and 9 middle part inner wall of central tube, 3 lower inner wall of upper outer cylinder are equipped with T stage rank,
It is equipped with steel ball 5, ball seat 6 in balance valve core 4, forms one group of ball-and-seat, during open flow, packing element about 10 two is made by ball-and-seat
Side pressure difference keeps balance, is conducive to removing seal for packer, and V-seal component 7 is set on 4 lower end of balance valve core, and sealing shroud 8 connects
It is on 4 lower end of balance valve core and V-seal component 7 is fixed；Top connection 1, balance valve core 4 be located at top connection pressure ring 2, on
In outer cylinder 3, it is equipped with backwash channel on balance valve core 4, upper outer cylinder 3, is convenient for fluid circulation, the inner cavity of top connection pressure ring 2 is same
Intracardiac hexagon ring prevents outer cylinder 3 and balance valve core 4 from mutually rotating, while ensuring the backwash channel alignment of the two, guarantees backwash
Runner is unobstructed in the process, and 1 lower end outer surface of top connection cooperates with concentric Hexagon hole, is conducive to 1 outer lower face surface of top connection same
It is slided up and down in intracardiac hexagon ring；
9 lower part of central tube is equipped with J-type slot, is equipped with anti-sand launder 111 in J-type slot, is beneficial to prevent during gentle solution pressure break
Tool sand card, packing element 10, retaining ring 11 are sequentially sleeved at the middle part of central tube 9, and packing element 10 is using can bear high pressure acidic environment
Material be made, using M shape compression-resistant structure, cone 12 is connected to 9 outer surface of central tube, and packing element 10, retaining ring 11 pass through upper outer
Cylinder 3, cone 12 are fixed on central tube 9；The outer surface of 9 lower part of central tube be equipped with anchor mechanism, pin ring 18, pin 19,
Righting mechanism, pin 19 can move up and down in J-type slot, and righting mechanism can improve anchor mechanism in the frictional force of internal surface of sleeve pipe,
It is capable of fixing anchor mechanism in inside pipe casing, it is ensured that pin 19 commutates freely in J-type slot, smoothly realizes and sets, unseals, guide shoe
27 are connected to the lower end of righting mechanism, and pressure cap 26 is connected to the lower end of central tube 9.
As shown in figure 4, balance valve core 4 includes valve core, circlip 41, lock pin 42, spring 43, holding screw 44, valve core
It is equipped with hole and through-hole, lock pin 42 and spring 43 are installed in hole, balance valve core can be locked in upper outer by lock pin 42 and spring 43
It is intracavitary in 3 upper ends of cylinder, when packer during the well entry process, balance valve core is locked in upper 3 upper end of outer cylinder by lock pin 42 and spring 43
It is interior it is intracavitary be inserted into V-seal component 7 can not in central tube 9, when packer tripping in predetermined depth, transfer tubing string at this time to envelope
Lotus is loaded every device, when compressive load reaches a certain level instantly, locking mechanism can be pushed through to step in upper outer cylinder 3, while being inserted into close
Downlink is sealed, V-seal component 7, which is inserted into central tube 9, completes sealing；Circlip 41 is mounted on the interior intracavitary of valve core, peace in through-hole
Holding screw 44 is filled, holding screw 44 can be fixed by balance valve core 4, ball seat 5, prevents the two from mutually rotation occurs.
As shown in Figure 1, anchor mechanism includes slips 13, slips clamp ring 14, spring 15, slip spider 16, slips cover for seat 17, card
Watt seat 16 is fixed on the outer surface of central tube 9, and slips 13 is laminated structure, and 13 upper end outer surface of slips is equipped with unidirectional tooth, single
Teeth directional to tooth is downward, to the anchoring of casing or is disanchored with 12 lower end of cone by interaction realization, is equipped in the middle part of slips 13
Groove, spring 15 are mounted in groove, and slips 13 is fixed on slip spider 16 by slips clamp ring 14 and slips cover for seat 17.
As shown in Figure 1, righting mechanism include strigil ontology 20, it is upper fixed ring 21, probe claw 22, semielliptic spring 23, lower solid
Determine ring 24, semielliptic spring 23 is fixed on probe claw 22, is equipped with groove in the middle part of 20 outer surface of strigil ontology, probe claw 22 passes through upper fixation
Ring 21 and lower fixed ring 24 are fixed in groove, and 20 both ends of strigil ontology are respectively and on 17 lower end of slips cover for seat, righting cylinder 25
End connection, righting mechanism enable packer to obtain preferable centralizing function in horizontal segment, and eccentric wear during well is prevented to be lost.
When carrying out the drag fracturing operation of horizontal well hydraulic jet perforation using oil pipe, the novel underseal of the utility model horizontal well
The top connection upper end of drag fracturing packer is successively connect with ball-and-seat, injector, safety joint, conventional oil pipe, in horizontal well
After carrying out drifting, scraping, well-flushing, packer is in position shown in Fig. 1 when entering well, and the pin 19 of packer is maintained at short slot C
Point position, as shown in figure 3,1-4 root oil pipe, which needs to apply certain load, send tool into pit shaft, referring to projected depth by tool
Down toward predetermined position, oil pipe 2.5m or so is above mentioned, runs the pin 19 of packer to A point position, as shown in figure 3, under then
The pin 19 of drain line, packer is run to B point, and packer realization at this time is set, as shown in Fig. 2, installing well later
Mouth and manifold of ground, carry out packer using pump truck to test envelope, while annular pipe ram being closed, test seal pressure and be usually no more than
Pressure decline is no more than 0.5MPa after 30MPa, termination of pumping 5min, tests sealing lattice, the abrasive perforating stage is initially entered later, according to spray
Sand perforation pump note program carries out perforation, when perforation finishes, continues to be pumped into flushing liquor replacing the quartz sand in pit shaft to ground.It closes
Casing cock, small displacement carries out examination to stratum and squeezes, if stratum does not rupture, suitable acid solution can be added to reduce ground into stratum
The fracture pressure of layer, until formation fracture.Subsequently into the pressing crack construction stage, casing cock is opened, is successively pumped to oil, set annular space
Enter prepad fluid, load fluid and displacement fluid, while keeping oil pipe external and internal pressure equal to oil pipe pumping liquid.Until construction finishes,
Closing well for a period of time, starts to carry out open flow, well-flushing with oil nozzle, then above mentions oil pipe 3-5m, runs the pin 19 of packer to A
Point position, removing seal for packer, continues above to mention oil pipe to next section of spray site position at this time, and packer is shifted to short slot by lower drain line
Position, then above proposes oil pipe 2-3m decentralization again, and the pin 19 of packer runs to B point position, makes packer setting, install well
Mouthful, it to testing seal about packer, tests to be honored as a queen and initially enters abrasive perforating, fracturing procedures stage, until the pressing crack construction section of complete design
Number.
After pressure break, open flow, by the ball-and-seat structure inside balance valve core 4, when the pressure of packer lower end is high
When upper end, low pressure pushes balance valve core 4, and balance valve core 4 is opened, and fluid enters packer upper end from packer lower end,
It realizes packer two-way pressure balance, packer is enable smoothly to unseal.Using the locking structure of balance valve core 4, such as Fig. 4 institute
Show, can preventing packer, V-seal component 7 is repeatedly inserted into during the well entry process, avoids V-seal component 7 during well
Abrasion.By the sand control structure in J-type slot on central tube 9, the sand for remaining in packer upper end after pressure break can be made to pass through
Anti- sand launder, to reduce the sand card of tool interior, raising tool once enters the ability of the multiple pressure break of well.
Claims (8)
1. a kind of novel underseal drag fracturing packer of horizontal well, which is characterized in that including top connection (1), top connection pressure ring
(2), upper outer cylinder (3), balance valve core (4), V-seal component (7), sealing shroud (8), central tube (9), packing element (10), retaining ring
(11), cone (12), pressure cap (26), guide shoe (27)；
The top connection (1) connect with balance valve core (4), upper outer cylinder (3) both ends respectively with top connection pressure ring (2), center
(9) connection is managed, inner wall, upper outer cylinder (3) lower inner wall are equipped with T stage rank, the balance valve core in the middle part of the central tube (9)
(4) steel ball (5), ball seat (6) are equipped in, the V-seal component (7) is set on balance valve core (4) lower end, the sealing shroud
(8) it is connected on balance valve core (4) lower end and V-seal component (7) are fixed；The top connection (1), balance valve core (4) point
Not Wei Yu top connection pressure ring (2), in upper outer cylinder (3)；
Central tube (9) lower part is equipped with J-type slot, and the packing element (10), retaining ring (11) are sequentially sleeved in central tube (9)
Portion, the cone (12) are connected to central tube (9) outer surface, and packing element (10), retaining ring (11) pass through upper outer cylinder (3), cone
(12) it is fixed on central tube (9)；The outer surface of central tube (9) lower part is equipped with anchor mechanism, pin ring (18), pin
(19), righting mechanism, the guide shoe (27) are connected to the lower end of righting mechanism, and the pressure cap (26) is connected to central tube (9)
Lower end.
2. the novel underseal drag fracturing packer of horizontal well according to claim 1, which is characterized in that the top connection
(1) upper end is equipped with centralizer wing (28).
3. the novel underseal drag fracturing packer of horizontal well according to claim 1, which is characterized in that the balance valve core
(4), backwash channel is equipped on upper outer cylinder (3).
4. the novel underseal drag fracturing packer of horizontal well according to claim 3, which is characterized in that the top connection pressure
The inner cavity of ring (2) is concentric Hexagon hole, and top connection (1) the lower end outer surface cooperates with concentric Hexagon hole, is prevented outer
Cylinder (3) and balance valve core (4) mutually rotate.
5. the novel underseal drag fracturing packer of horizontal well according to claim 3 or 4, which is characterized in that the balance
Spool (4) includes valve core, circlip (41), lock pin (42), spring (43), holding screw (44), and the valve core is equipped with hole
And through-hole, lock pin (42) and spring (43), the lock pin (42) and spring (43) are installed in the hole can lock balance valve core
It is scheduled on intracavitary in outer cylinder (3) upper end, the circlip (41) is mounted on the interior intracavitary of valve core, and clamp screw is installed in the through-hole
It follows closely (44), the holding screw (44) can be fixed by balance valve core (4), ball seat (6), prevents the two from mutually rotation occurs.
6. the novel underseal drag fracturing packer of horizontal well according to claim 1, which is characterized in that in the J-type slot
Equipped with anti-sand launder (111).
7. the novel underseal drag fracturing packer of horizontal well according to claim 1, which is characterized in that the anchor mechanism
Including slips (13), slips clamp ring (14), spring (15), slip spider (16), slips cover for seat (17), the slip spider (16) is fixed
On the outer surface of central tube (9), the slips (13) is laminated structure, and slips (13) the upper end outer surface is equipped with unidirectional
The teeth directional of tooth, the unidirectional tooth is downward, and groove is equipped in the middle part of the slips (13), and the spring (15) is mounted in groove, institute
Slips (13) are stated to be fixed on slip spider (16) by slips clamp ring (14) and slips cover for seat (17).
8. the novel underseal drag fracturing packer of horizontal well according to claim 7, which is characterized in that the righting mechanism
Including strigil ontology (20), upper fixed ring (21), probe claw (22), semielliptic spring (23), lower fixed ring (24), the arch bullet
Spring (23) is fixed on probe claw (22), and groove is equipped in the middle part of strigil ontology (20) outer surface, and the probe claw (22) passes through upper
Fixed ring (21) and lower fixed ring (24) are fixed in groove, strigil ontology (20) both ends respectively with slips cover for seat (17)
Lower end, the connection of righting cylinder (25) upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821862245.5U CN208669259U (en) | 2018-11-12 | 2018-11-12 | A kind of novel underseal drag fracturing packer of horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821862245.5U CN208669259U (en) | 2018-11-12 | 2018-11-12 | A kind of novel underseal drag fracturing packer of horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208669259U true CN208669259U (en) | 2019-03-29 |
Family
ID=65820874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821862245.5U Expired - Fee Related CN208669259U (en) | 2018-11-12 | 2018-11-12 | A kind of novel underseal drag fracturing packer of horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208669259U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130851A (en) * | 2019-06-22 | 2019-08-16 | 辽宁新华仪器有限公司 | A kind of anti-top tool of pressure break |
| CN112814639A (en) * | 2021-02-04 | 2021-05-18 | 广州海洋地质调查局 | Expansion type staged fracturing process pipe column and fracturing method |
-
2018
- 2018-11-12 CN CN201821862245.5U patent/CN208669259U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130851A (en) * | 2019-06-22 | 2019-08-16 | 辽宁新华仪器有限公司 | A kind of anti-top tool of pressure break |
| CN110130851B (en) * | 2019-06-22 | 2024-05-07 | 辽宁新华仪器有限公司 | Fracturing roof-preventing tool |
| CN112814639A (en) * | 2021-02-04 | 2021-05-18 | 广州海洋地质调查局 | Expansion type staged fracturing process pipe column and fracturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105239965B (en) | Halogen method is arranged in salt hole air reserved storeroom gas injection | |
| CN107178354B (en) | A kind of casing is interior without differential drag fracturing technique and fracturing tool string | |
| CN104153753B (en) | Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging | |
| US2352700A (en) | Open hole removable packer | |
| CN204357385U (en) | Unlockable hydraulic casing anchoring device | |
| RU2005113714A (en) | FINISHING A WELL FOR ONE DOWN OF A PUMP AND COMPRESSOR COLUMN | |
| CN208669259U (en) | A kind of novel underseal drag fracturing packer of horizontal well | |
| CN106014346A (en) | Method and device for water drainage and gas production by speed string matched with plunger gas lift | |
| CN106522918A (en) | Test operation tubular column capable of realizing direct-push kill well and stratum test method thereof | |
| CN101392633B (en) | Mechanical and hydraulic double-acting expansion sieve tube hanger | |
| CN109113684A (en) | Small casing producing well mechanical sand control method and mechanical sand control tubing string and fishing tool | |
| CN205000943U (en) | But anchor tile modus ponens casing packer | |
| CN105840154A (en) | Novel slip-type downhole throttler | |
| CN114482891A (en) | Friction setting sand prevention pipe column, friction setting packer and method | |
| CN207296937U (en) | High-pressure oil-gas well hydraulic oil pipe anchoring device | |
| CN104196492B (en) | A kind of dragging down-hole plugging valve with pressure | |
| CN103775025B (en) | Sizing collar | |
| CN205532529U (en) | Piston control formula is prevented returning and is told eccentric injection mandrel | |
| CN110439510A (en) | A kind of method of layer-by-layer acidification seperated layer water injection | |
| CN204716194U (en) | A kind of bridging plug and releasing gadget thereof | |
| RU2513896C1 (en) | Method of dual operation of two strata with one well | |
| CN205000922U (en) | Built -in coiled tubing completion pipe string | |
| RU2598256C1 (en) | Method for hydrodynamic tests of exploitation well formation (versions) | |
| CN201620816U (en) | Deep well fracturing and acidizing packer | |
| CN201851076U (en) | Seat-sealed tieback insertion head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190329 Termination date: 20191112 |