CN206144502U - Drag for sand instrument in pit - Google Patents
Drag for sand instrument in pit Download PDFInfo
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- CN206144502U CN206144502U CN201621081399.1U CN201621081399U CN206144502U CN 206144502 U CN206144502 U CN 206144502U CN 201621081399 U CN201621081399 U CN 201621081399U CN 206144502 U CN206144502 U CN 206144502U
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Abstract
The utility model provides a drag for sand instrument in pit, the last check valve that connects gradually including top -down, plunger pump, storage sandpipe, down the check valve, shovel the head. The plunger pump includes the urceolus and sets up at the inside interior plunger of urceolus, interior plunger includes that top -down connects gradually draws liquid pipe, connector, piston, the urceolus includes position sleeve and outer tube that top -down connected gradually. Piston outer wall cover has the sealing ring, seals up in outer inside pipe wall, the connection of piston bottom is used for adjusting the end cap of sealing ring elasticity. This instrument simple structure, this drag for sand instrument in pit follows the protection oil layer angle, adopts brand -new design, and without pump truck and other auxiliary assembly, the activity tubular column can be realized pulling sand setting in the well out about only needing, has avoided the injury of income well liquid to the stratum, effectively protection oil layer. This instrument easy operation, technology are reliable, and the security is high, and be applicable in various complicated hole conditions such as straight well, horizontal well, sidetracked hole, with low costs, high efficiency.
Description
Technical field
This utility model is related to oil field flow string, and especially sand instrument is dragged in a kind of down-hole.
Background technology
Oil field development enters middle and late stage, and some blocks are by long-term injecting water or gas injecting mining and the irrational production system of oil well
The impact of degree, reservoir skeleton is destroyed and is caused sand production in oil, and the stratum after shaking out is in state in debt, constantly enlarged meeting in debt
Cause oil reservoir to cave in, shake out and be further exacerbated by.Sand production amount reach sand bury production layer when, will result in the oil well underproduction or stop
Produce.For the process of sand production, the existing conventional sand removal method in oil field mainly has two kinds of hydraulic sand washing and mechanical sand-picking.Waterpower
Sand washing method has that sand washing amount is big, bottom-hole cleaning completely, process is simple the characteristics of, but construction cost is higher, works as strata pressure
When coefficient is low, sand cleaning fluid can in a large number leak into stratum, polluted reservoir；When well is very deep and during relatively low strata pressure, sand cleaning fluid is difficult to return
To ground, the failure of hydraulic sand washing method, easily there is sand card tubing string；When stratum is water-sensitive strata, hydraulic sand washing method easily leaks into ground
Layer, flushing fluid is different degrees of to be damaged to stratum, is unfavorable for lower step oil mining.And conventional mechanical methods drag for sand and are although not required to
External sand cleaning fluid, will not polluted reservoir, but exist and once drag for that sand amount is few, the trip time is long during well depth, and it is low to drag for sand efficiency, no
Economic the shortcomings of.
Utility model content
The purpose of this utility model is to provide a kind of down-hole and drags for sand instrument, and the down-hole is dragged for sand instrument and gone out from formation protection angle
Send out, without pump truck and other auxiliary equipments, it is only necessary to which up and down tubing string is capable of achieving to pull out sand setting in well, it is to avoid working fluid
Injury to stratum, can effective protection oil reservoir.Meanwhile, the tool operation is simple, process, safe, is applicable to straight
The various complex hole conditions such as well, horizontal well, sidetracked hole, low cost, high efficiency.
The purpose of this utility model can be realized by following technical solution：
The down-hole drag for sand instrument include be sequentially connected from top to bottom upper check valve, plunger displacement pump, storage sand tube, lower check valve,
Shovel head.
The purpose of this utility model can also be realized by following technical solution：
The plunger displacement pump includes outer tube and is arranged on the inner plunger of outer barrel, the inner plunger include from top to bottom according to
The liquid sucking tube of secondary connection, union joint, piston, the outer tube includes positioning sleeve and the outer tube being sequentially connected from top to bottom.
The piston outer wall is cased with sealing ring, is sealed in outer tube wall, and the piston base connection is used for adjusting sealing ring
Elastic plug.
There is annular space between the outer tube and liquid sucking tube, elongated slot is opened up on the liquid sucking tube, the positioning sleeve inwall is arranged
Chuck, chuck is stretched in elongated slot and run in elongated slot, and the positioning sleeve opens up the radial hole for connecting above-mentioned annular space.
The outer tube lower end passes sequentially through adapter sleeve, box cupling connection storage sand tube.
The upper check valve includes upper press ring, upper spring housing, spring, change buckle joint, steel ball, and the change buckle joint lower end connects
The liquid sucking tube of plunger displacement pump is connect, variable buckle upper end of joint connection top connection, the upper spring housing is located at top connection inner chamber, upper spring housing bottom
Portion's sealing is fixed on variable buckle upper end of joint, and upper spring housing top forms between the two annular space, the upper spring with top connection
Set and top connection circumferential wall open up radial hole, and the steel ball is seated in inner port under spring housing, and the spring is placed in bullet
In spring set, the upper press ring is connected to the upper end of spring housing and spring.
The lower check valve includes lower pressure ring, lower spring set, spring, the shovel head upper end connection lower spring set and overcoat,
Outer set upper side connects storage sand tube, and the lower spring set is located at overcoat inner chamber, and the spring is placed in lower spring set, the lower pressure ring
The upper end of spring and lower spring set is connected to, the steel ball is seated at the upper port of shovel head.
This utility model has the advantages that：
1st, tool design is produced in instrument inside and outside and is reached as high as 5- using the pump shaft relative motion principle of upper and lower pumping
The pressure reduction of 8MPa, so as to realize that pit shaft sand grains is pumped in instrument, and is stored in storage sand tube, logical after storage sand tube has been expired
Cross working rig and act pit shaft, sand is discharged, reach pit shaft sand removal purpose, single bailed sand pillar height degree 500m；
2nd, instrument upper and lower ends devise the check valve of two relative switches, and when tubing string is up, bottom check valve is opened, on
Portion's closed check valve, pit shaft sand liquid is by quick pumping instrument；When tubing string is descending, bottom closed check valve, upper one-way valve is beaten
Open, liquid is slowly discharged from upper tool part check valve, and sand is stayed in storage sand tube.The structure ensures that pit shaft sand grains is smooth from bottom
Instrument inner core is sinked, can't be discharged from top and be caused sand to bury, it is ensured that drag for sand effect；
3rd, sunk key structure is designed between instrument inner plunger and outer tube, it is ensured that between tool component can relative motion, and
Will not mutually deviate from causes instrument to damage, at the same when ensureing that tubing string is rotated forward instrument will not relative motion, power can be transmitted
It is safe to shaft bottom, it is adaptable to the complex hole condition such as horizontal well, high angle hole and sidetracked hole；
4th, tool bottom is designed to scoop structure, when realizing visiting sand face will not sand bury, while sand face can effectively be smashed to pieces, make sand
Face is soft, so that shaft bottom sand grains easily enters sand setting tubing string with current, sand effect is dragged in raising.
Description of the drawings
Fig. 1 is the structural representation of this utility model embodiment.
In figure：1- top connections；2- upper press rings；The upper spring housings of 3-；4th, 20- springs；5th, 21- steel balls；6- becomes buckle joint；7- draws
Liquid pipe；8- positioning sleeves；9- outer tubes；10- union joints；11- sealing rings；12- pistons；13- plugs；14- adapter sleeves；15- box cuplings；
16- storage sand tubes；17- overcoats；18- lower spring sets；Pressure ring under 19-；22- shovel heads.
Specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate description of the drawings as follows, but accompanying drawing only provides ginseng
Examine and purposes of discussion, not for being any limitation as to this utility model.
According to Fig. 1, sand instrument is dragged in down-hole, including the upper check valve, plunger displacement pump, storage sand tube being sequentially connected from top to bottom, under
Check valve, shovel head.
The plunger displacement pump includes outer tube and is arranged on the inner plunger of outer barrel, the inner plunger include from top to bottom according to
The liquid sucking tube 7 of secondary connection, union joint 10, piston 12, the outer tube includes positioning sleeve 8 and the outer tube 9 being sequentially connected from top to bottom.
The piston outer wall is cased with sealing ring 11, is sealed in outer tube wall, and the piston base connection is elastic for adjusting sealing ring
Plug 13.There is annular space between the outer tube and liquid sucking tube, elongated slot is opened up on the liquid sucking tube, the positioning sleeve inwall arranges card
Platform, chuck is stretched in elongated slot and run in elongated slot, and the positioning sleeve opens up the radial hole for connecting above-mentioned annular space.The outer tube lower end
Pass sequentially through adapter sleeve 14, the connection storage sand tube 16 of box cupling 15.
The upper check valve includes upper press ring 2, upper spring housing 3, spring 4, change buckle joint 6, steel ball 5, the change buckle joint 6
Lower end connects the liquid sucking tube 7 of plunger displacement pump, becomes the connection top connection 1 of the upper end of buckle joint 6, and the upper spring housing is located at top connection inner chamber,
Upper spring housing sealed bottom is fixed on change buckle joint 6 upper end, and upper spring housing top forms between the two annular space with top connection,
The upper spring housing and top connection circumferential wall open up radial hole, and the steel ball 5 is seated in 3 times inner ports of spring housing, described
Spring 4 is placed in spring housing 3, and the upper press ring 2 is connected to the upper end of spring housing and spring.
The lower check valve includes lower pressure ring 19, lower spring set 18, spring 20, the upper end of the shovel head 22 connection lower spring set
18 and overcoat 17, the upper end of overcoat 17 connection storage sand tube 16, the lower spring set 18 is located at the inner chamber of overcoat 17, and the spring 20 is placed in
In lower spring set 18, the lower pressure ring 19 is connected to the upper end of spring and lower spring set, and the steel ball 21 is seated in shovel head 22
At upper port.
Screw thread, lower end and the change screwed connection of buckle joint 6 are left in the upper end of top connection 1, and upper press ring 2 and the screw thread of upper spring housing 3 connect
Connect, spring 4 is placed on the interior intracavity of upper press ring 2 and the composition of upper spring housing 3, steel ball 5 is placed on 3 times inner ports of spring housing, pushes up
Portion is connected by the controller perturbation of spring 4, upper spring housing 3 and change buckle joint 6.Upper spring housing 3 and the circumference of top connection 1 are provided with hole slot, and two
Person's fluid communication.Become the lower end of buckle joint 6 and the upper end screwed connection of liquid sucking tube 7, liquid sucking tube 7 is by union joint 10 and the screw thread of piston 12
Connection, is provided with sealing ring 11 on piston 12, and the cooperation of the inner chamber of outer tube 9 is sealed, and it is elastic that plug 13 can control sealing ring 11.
Positioning sleeve 8, the screwed connection of outer tube 9, and on liquid sucking tube 7, wide 8-10mm, the length of depth 5-6mm are offered on liquid sucking tube 7
Groove, being coordinated by the control key on positioning sleeve 8 to be stretched.Outer tube 9, adapter sleeve 14, box cupling 15, storage sand tube 16 are from top to bottom
Screwed connection, storage sand tube 16 is usually conventional oil pipe, and its length is designed as 50-200m according to hole condition, under storage sand tube 16
End and the screwed connection of overcoat 17, lower spring set 18 and shovel head 22 are welded, and steel ball 21 is placed on lower spring set 18, shovel head 22 composition
In inner chamber, top is elastic come control pressure size by the screw thread of lower pressure ring 19 and lower spring set 18 by spring 20.In shovel head 22
End and the lower end screwed connection of overcoat 17, loosen the raising of bottom sand particles and draw when the lower end of shovel head 22 is designed as spade to work
Efficiency.
During work, instrument is liquid sucking tube 7, union joint 10, sealing ring 11, piston 12, stifled by the quick pumping of top oil pipe
The outer tube of inner plunger relative localizations set 8, outer tube 9 composition of 13 compositions moves back and forth.When inner plunger is up, outer tube and
Lower end tubing string produces Negative Pressure Difference, and the sand liquid mixture in sleeve pipe will push steel ball 21 open into tubing string inner chamber by shovel head 22, and
Full of storage sand tube 16；When interior tubing string is descending, in the presence of fluid power, steel ball 21 is closed, and steel ball 5 is opened, and liquid connects from above
Eyelet on 1 is discharged, and sand is preserved in storage sand tube 16.Repeatedly after pumping, rise out after tubing string storage sand tube 16 is full of sand
And sand is disposed to ground, and then enter the instrument down again until pit shaft sand has obtained thorough removing, that is, complete and drag for sand and apply
Work.
Sand instrument is dragged for from formation protection angle in the down-hole, auxiliary with other without pump truck using brand-new mentality of designing
Help equipment, it is only necessary to which up and down tubing string is capable of achieving to pull out sand setting in well, it is to avoid injury of the working fluid to stratum, can be effective
Formation protection.Meanwhile, the tool operation is simple, process, safe, is applicable to straight well, horizontal well, sidetracked hole etc. each
Plant complex hole condition, low cost, high efficiency, with preferable application prospect.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the scope of the claims of the present utility model, its
He all should all belong to the scope of the claims of the present utility model with the equivalence changes of patent spirit of the present utility model.
Claims (7)
1. sand instrument is dragged in a kind of down-hole, it is characterised in that including the upper check valve, plunger displacement pump, storage sand that are sequentially connected from top to bottom
Pipe, lower check valve, shovel head.
2. sand instrument is dragged in a kind of down-hole according to claim 1, it is characterised in that the plunger displacement pump includes outer tube and sets
The inner plunger in outer barrel is put, the inner plunger includes liquid sucking tube, union joint, the piston being sequentially connected from top to bottom, described
Outer tube includes positioning sleeve and the outer tube being sequentially connected from top to bottom.
3. sand instrument is dragged in a kind of down-hole according to claim 2, it is characterised in that the piston outer wall is cased with sealing ring,
Outer tube wall is sealed in, the piston base connection is used for adjusting the elastic plug of sealing ring.
4. sand instrument is dragged in a kind of down-hole according to claim 2, it is characterised in that have between the outer tube and liquid sucking tube
Annular space, opens up elongated slot on the liquid sucking tube, the positioning sleeve inwall arranges chuck, and chuck is stretched in elongated slot and run in elongated slot,
The positioning sleeve opens up the radial hole for connecting above-mentioned annular space.
5. sand instrument is dragged in down-hole according to claim 2, it is characterised in that the outer tube lower end pass sequentially through adapter sleeve,
Box cupling connects storage sand tube.
6. sand instrument is dragged in a kind of down-hole according to claim 1, it is characterised in that the upper check valve include upper press ring,
Upper spring housing, spring, change buckle joint, steel ball, the change buckle joint lower end connects the liquid sucking tube of plunger displacement pump, and variable buckle upper end of joint connects
Connect joint, the upper spring housing is located at top connection inner chamber, upper spring housing sealed bottom is fixed on variable buckle upper end of joint, and on
Spring housing top forms between the two annular space with top connection, and the upper spring housing and top connection circumferential wall open up radial hole, institute
State steel ball and be seated in inner port under spring housing, the spring is placed in spring housing, and the upper press ring is connected to spring housing
With the upper end of spring.
7. sand instrument is dragged in a kind of down-hole according to claim 1, it is characterised in that the lower check valve include lower pressure ring,
Lower spring set, spring, the shovel head upper end connection lower spring set and overcoat, outer set upper side connects storage sand tube, the lower spring set
Positioned at overcoat inner chamber, the spring is placed in lower spring set, and the lower pressure ring is connected to the upper end of spring and lower spring set, steel ball
It is seated at the upper port of shovel head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621081399.1U CN206144502U (en) | 2016-09-26 | 2016-09-26 | Drag for sand instrument in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621081399.1U CN206144502U (en) | 2016-09-26 | 2016-09-26 | Drag for sand instrument in pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206144502U true CN206144502U (en) | 2017-05-03 |
Family
ID=58620883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621081399.1U Active CN206144502U (en) | 2016-09-26 | 2016-09-26 | Drag for sand instrument in pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206144502U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869322A (en) * | 2016-09-26 | 2018-04-03 | 中国石油化工股份有限公司 | Drag for sand instrument in underground |
-
2016
- 2016-09-26 CN CN201621081399.1U patent/CN206144502U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869322A (en) * | 2016-09-26 | 2018-04-03 | 中国石油化工股份有限公司 | Drag for sand instrument in underground |
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