CN204899825U - Sand instrument is dragged for to negative pressure - Google Patents
Sand instrument is dragged for to negative pressure Download PDFInfo
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- CN204899825U CN204899825U CN201520680137.6U CN201520680137U CN204899825U CN 204899825 U CN204899825 U CN 204899825U CN 201520680137 U CN201520680137 U CN 201520680137U CN 204899825 U CN204899825 U CN 204899825U
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- universal joint
- drags
- screw pump
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Abstract
The utility model discloses a sand instrument is dragged for to negative pressure, including negative pressure generator, negative pressure generator is including the screw rod and the screw pump that are located upper and lower portion, be provided with the universal joint protective sheath between screw rod and the screw pump, universal joint protective sheath inner chamber is equipped with the universal joint, the upper and lower end of universal joint is connected with screw drive axle, screw pump rotor respectively, the lower extreme of screw pump connects gradually through a plurality of sand sediment pipes of first drilling tool with double -deck pipe wall, the lower extreme of sand sediment pipe through the second drilling tool with drag for the sand shoes and be connected. The utility model discloses sand instrument is dragged for to negative pressure can drag for sand while boring, and once the volume of dragging for sand is big, easy operation.
Description
Technical field
The utility model relates to oil drilling well workover field, espespecially a kind of low for reservoir pressure coefficient time the shaft bottom negative pressure of shaking out drag for sand instrument.
Background technology
The oil well of current oil field at home all ubiquity shakes out phenomenon, shake out and can form sand post in shaft bottom, flood payzone, increase oil gas water flow resistance, Oil/gas Well output is reduced, not even output, have erosion damage effect to down-hole and surface line, particularly precipitation or fouling in the petroleum pipeline of ground, affects the output of oil gas.For pump extraction oil well, sand grains enters electric pump unit, can produce sand card.Also cause frequent well workover because shaking out, increasing the workover cost in oil field.
For eliminating the harm of shaking out, hydraulic sand washing and the large class technology of mechanical sand-picking two are developed at present.Hydraulic sand washing sand washing amount is large, and bottom-hole cleaning is complete, but sand cleaning fluid can leak into stratum because of a variety of causes, contaminated oil gas-bearing formation, and when when well is very dark, strata pressure is lower, sand cleaning fluid is difficult to return to ground, causes hydraulic sand washing to lose efficacy.Mechanical sand-picking does not need external sand cleaning fluid, thus can not polluted reservoir.But it is few that existing mechanical sand-picking instrument once drags for sand amount, and in deep-well, effect is not too obvious.Although it is larger that sand bucket drags for sand amount, due to the cementing and little junk of sand grains cannot be abolished, often cause that to drag for sand unsuccessful.
Utility model content
The purpose of this utility model is to provide a kind of negative pressure to drag for sand instrument, and it can drag for sand in brill limit, limit, and once drags for sand amount greatly, simple to operate.
To achieve these goals; technical solution of the present utility model is: a kind of negative pressure drags for sand instrument; comprising negative pressure generator; described negative pressure generator comprises the screw rod and screw pump that are positioned at upper and lower part; universal joint protective sleeve is provided with between described screw rod and screw pump; described universal joint protective sleeve inner chamber is provided with universal joint; the upper and lower end of described universal joint is connected with screw rod, screw pump respectively; the lower end of described screw pump is connected with multiple sand sediment pipes of double-layer tube wall successively by the first drilling tool, the lower end of described sand sediment pipe by the second drilling tool with drag for sand footwear and be connected.
The utility model negative pressure drags for sand instrument; the inner chamber of wherein said universal joint protective sleeve is ladder shrinkage cavity; the appearance of described universal joint protective sleeve has multiple by-pass prot; the upper end of described universal joint protective sleeve is provided with the first box be connected with screw rod, and the lower end of described universal joint protective sleeve is provided with the first pin thread be connected with screw pump.
The utility model negative pressure drags for sand instrument, and the upper and lower end of wherein said universal joint is connected with the power transmission shaft of screw rod and the rotor of screw pump respectively.
The utility model negative pressure drags for sand instrument, wherein said sand sediment pipe comprises outer tube and is arranged at the interior pipe of outer tube bore, described interior pipe is supported on outer tube by multiple wiper block, and the upper end of described interior pipe is sealed by plug, and the top of described interior pipe is provided with multiple weep hole.
The utility model negative pressure drags for sand instrument, and wherein said screw rod upper end is connected with the 3rd drilling tool.
The utility model negative pressure drags for sand instrument, and the lower end of wherein said screw pump is connected with crossover sub, and described crossover sub lower end is connected with the upper end of described first drilling tool.
The utility model negative pressure drags for sand instrument, wherein many described outer tubes are directly serially connected or are serially connected by many drilling tools, the upper and lower end of many described outer tubes is connected with top connection and lower contact, described top connection is connected with the lower end of described first drilling tool, and described lower contact is connected with the described sand footwear that drag for by described second drilling tool.
The utility model negative pressure drags for sand instrument, is equipped with packing between wherein said top connection and outer tube and between lower contact and outer tube.
After adopting such scheme, the utility model negative pressure is dragged for sand instrument and is had the following advantages:
1, by the local circulation that negative pressure generator drives, solve because strata pressure is low, normal circulation cannot take the problem of sand;
2, connect under utilizing sand sediment pipe and drag for sand footwear, the mode driving it to rotate by ground, the grinding of Large stone sand setting can be diminished, the local circulation produced by negative pressure generator, achieves the object that sand is efficiently dragged on brill limit, limit;
3, be connected in series sand sediment pipe, ensure that disposable sand amount of dragging for is unrestricted, effectively reducing the number of times pulled out of hole because dragging for sand amount.
Accompanying drawing explanation
Fig. 1 is the structural representation of negative pressure generator of the present utility model;
Fig. 2 is universal joint protective sleeve structural representation of the present utility model;
Fig. 3 is the structural representation of screw pump of the present utility model;
Fig. 4 is sand sediment pipe structural representation of the present utility model;
Fig. 5 is that the utility model negative pressure drags for sand tool fluid loop structure schematic diagram.
Below in conjunction with accompanying drawing, by embodiment, the utility model is described further;
Detailed description of the invention
As shown in Figure 1 and Figure 5, the utility model negative pressure drags for sand instrument, comprise negative pressure generator 1, negative pressure generator 1 comprises the screw rod 2 and screw pump 3 that are positioned at upper and lower part, when reality uses, the upper end of screw rod 2 connects the 3rd drilling tool 26 (with reference to figure 5), and the 3rd drilling tool 26 is connected to form by the parts such as drilling rod, joint, is prior art.Universal joint protective sleeve 4 is provided with between screw rod 2 and screw pump 3; the inner chamber of universal joint protective sleeve 4 is provided with universal joint 5; the upper end of universal joint 5 is connected with the power transmission shaft 6 of screw rod 2; shown in composition graphs 3; the lower end of universal joint 5 is connected with the rotor 7 of screw pump 3, and the effect of universal joint 5 moment of torsion that screw rod exports is passed to screw pump produce pumping negative pressure.Shown in composition graphs 2, the inner chamber of universal joint protective sleeve 4 is ladder shrinkage cavity 8, and the external surface of universal joint protective sleeve 4 is provided with multiple by-pass prot 9, and the inner chamber upper end of universal joint protective sleeve 4 is provided with the first box 10, first box 10 be connected with screw rod 2 and is connected with screw rod 2.The lower end of universal joint protective sleeve 4 is provided with the first pin thread 11, first pin thread 11 be connected with screw pump 3 and is connected with the upper end of screw pump 3.The lower end of screw pump 3 is connected with crossover sub 12, and crossover sub 12 center is provided with through hole 13, and crossover sub 12 lower end is connected with the upper end of the first drilling tool 14.First drilling tool 14 is connected to form by the parts such as drilling rod and joint, and this is prior art, no longer explains restriction to its structure herein.The lower end of the first drilling tool 14 is connected successively with multiple sand sediment pipes 15 of double-layer tube wall, the lower end of sand sediment pipe 15 by the second drilling tool 16 with drag for sand footwear 17 and be connected.
Shown in composition graphs 4, sand sediment pipe 15 comprises outer tube 18 and is arranged at the interior pipe 19 of outer tube 18 inner chamber, and interior pipe 19 is supported on outer tube 18 by multiple holding up apart from block 20, and the upper end of interior pipe 19 is sealed by plug 21, and the top of interior pipe 19 is provided with multiple weep hole 22.The connection of multiple sand sediment pipe 15 is directly serially connected by multiple outer tube 18, or be serially connected by multiple drilling tool, and drilling tool comprises drilling rod, drill collar and joint etc.The upper and lower end of multiple outer tube 18 is connected with top connection 23 and lower contact 24, and top connection 23 is connected with the lower end of the first drilling tool 14, lower contact 24 by the second drilling tool 16 with drag for sand footwear 17 and be connected.Packing 25 is equipped with between top connection 23 and outer tube 18 and between lower contact 24 and outer tube 18.
It is up that fluid enters interior pipe 19 from the hydrophthalmia dragging for sand footwear 17, during to interior pipe 19 top, because plug 21 changes runner, enter the annular space between interior pipe 19 and outer tube 18 through weep hole 22, flow velocity reduces, and the sand carried is deposited to the annular space between interior pipe 19 and outer tube 18.To enter through adjacent sand sediment pipe 15 joint in a upper sand sediment pipe 15 in pipe 19 again, repeat same sand setting process.Be deposited to the sand in the annular space between interior pipe 19 and outer tube 18, during trip-out, be carried to ground.Drag for sand footwear 17 and can select milling shoe or junk mill.Be divided into two kinds according to sand setting situation: one is that sand setting particle diameter is little, do not need grinding, the situation mainly depositing compacting or harden, selects milling shoe; Another kind is that sand setting particle diameter is comparatively large, needs to grind to form the situation of just more convenient salvaging after small particle diameter, selects junk mill.
The effect that the utility model negative pressure drags for the screw rod 2 of sand instrument is under the driving of surface mud pump, exports enough large moment of torsion.Screw rod 2 can be liquid driven, also can use air screw; The effect of universal joint 5 is transmitting torques, plays anti-lost effect to the rotor 7 of screw pump 3 simultaneously; Universal joint protective sleeve 4 is except being used for except connecting screw rod 2 and screw pump 3, and also have an important function to be serve as bypass valve, the water under surface pump flows to annular space from by-pass prot 9 after screw rod 2; Screw pump 3 draws up the water come and also flows to annular space from by-pass prot 9; The effect of screw pump 3 produces enough large negative pressure by pumping, overcomes the local circulation that whole cyclic pressure dissipation realizes drilling fluid, and the speed that makes to backflow is enough to take sand, keeps clean in well.
For Different Strata pressure coefficient, liquid level position change this feature greatly, require that negative pressure generator can be arranged on any position on well casing string (at least the rice of 100-200 below liquid level), require that negative pressure generator has enough tensile strength and anti-twisting property like this, therefore general screw and screw pump are improved, mainly under the prerequisite keeping screw rod and screw pump performance, enhance outer wall.
Shown in figure 5, the sand technique of dragging for of dragging for sand instrument by the utility model negative pressure comprises the steps:
(1) survey annulus liquid level, determine the installation site of negative pressure generator 1, ensure that negative pressure generator 1 is at least installed on below liquid level 100-200 rice;
(2) drag for sand sediment pipe 15 and the quantity of sand amount design needs according to bailing well section and drag for sand number of times;
(3) according to the position of borehole diameter and hole deviation situation determination sand sediment pipe 15, generally sand sediment pipe 15 is placed on straight well section;
(4) behind the position determining negative pressure generator 1, sand sediment pipe 15, determine drilling assembly again, drilling assembly is exactly the instrument determined is dragged for sand footwear 17, second drilling tool 16, multiple sand sediment pipe 15, first drilling tool 14 above, and negative pressure generator 1 and the 3rd drilling tool 26 etc. enter down in order;
(5) under drilling assembly visit sand face, according at the bottom of completion interval of well with under enter drill string depth correlation determination sand face, what the distance at the bottom of sand face to completion interval of well was corresponding is exactly that sand drilling depth is dragged in design;
(6) visit on behind sand face and carry drilling tool 1-2 rice, turn on pump, drive rotating disk, discharge capacity general 5-12 liter/second, the general 30-100 rev/min of rotary speed; Turn on pump refers to that energising starts slush pump, and driving rotating disk is that energising makes rotating disk turn over.After turn on pump, surface mud will enter in drilling tool and circulate, thus screw rod 2 will rotate, produce moment of torsion, pass to screw pump 3 and produce pumping negative pressure, thus negative pressure generator 1 is started working, after driving rotating disk, during dial rotation by the second drilling tool 16 drive below drag for sand footwear 17, thus broken shaft bottom sand, fine sand is entered and drags for sand footwear 17, thus be up in each sand sediment pipe 15;
(7) slowly transfer drilling tool to carry out dragging for sand operation, the general 0-3 ton of the pressure of the drill, can adjust according to field condition, notes observing vertical pressure, pump pressure, torque parameter change simultaneously;
(8) drag for sand complete after trip-out;
(9) well head cleaning sand setting.
The above embodiment is only be described preferred embodiment of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that the common engineers and technicians in this area make the technical solution of the utility model and improvement, all should fall in protection domain that claims of the present utility model determine.
Claims (8)
1. a negative pressure drags for sand instrument; it is characterized in that: comprise negative pressure generator; described negative pressure generator comprises the screw rod and screw pump that are positioned at upper and lower part; universal joint protective sleeve is provided with between described screw rod and screw pump; described universal joint protective sleeve inner chamber is provided with universal joint; the upper and lower end of described universal joint is connected with screw rod, screw pump respectively; the lower end of described screw pump is connected with multiple sand sediment pipes of double-layer tube wall successively by the first drilling tool, the lower end of described sand sediment pipe by the second drilling tool with drag for sand footwear and be connected.
2. negative pressure as claimed in claim 1 drags for sand instrument; it is characterized in that: the inner chamber of described universal joint protective sleeve is ladder shrinkage cavity; the appearance of described universal joint protective sleeve has multiple by-pass prot; the upper end of described universal joint protective sleeve is provided with the first box be connected with screw rod, and the lower end of described universal joint protective sleeve is provided with the first pin thread be connected with screw pump.
3. negative pressure as claimed in claim 2 drags for sand instrument, it is characterized in that: the upper and lower end of described universal joint is connected with the power transmission shaft of screw rod and the rotor of screw pump respectively.
4. the negative pressure as described in one of claim 1-3 drags for sand instrument, it is characterized in that: described sand sediment pipe comprises outer tube and is arranged at the interior pipe of outer tube bore, described interior pipe is supported on outer tube by multiple wiper block, the upper end of described interior pipe is sealed by plug, and the top of described interior pipe is provided with multiple weep hole.
5. negative pressure as claimed in claim 4 drags for sand instrument, it is characterized in that: described screw rod upper end is connected with the 3rd drilling tool.
6. negative pressure as claimed in claim 5 drags for sand instrument, and it is characterized in that: the lower end of described screw pump is connected with crossover sub, described crossover sub lower end is connected with the upper end of described first drilling tool.
7. negative pressure as claimed in claim 6 drags for sand instrument, it is characterized in that: many described outer tubes are directly serially connected or are serially connected by many drilling tools, the upper and lower end of described outer tube is connected with top connection and lower contact, described top connection is connected with the lower end of described first drilling tool, and described lower contact is connected with the described sand footwear that drag for by described second drilling tool.
8. negative pressure as claimed in claim 7 drags for sand instrument, it is characterized in that: be equipped with packing between described top connection and outer tube and between lower contact and outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520680137.6U CN204899825U (en) | 2015-09-06 | 2015-09-06 | Sand instrument is dragged for to negative pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520680137.6U CN204899825U (en) | 2015-09-06 | 2015-09-06 | Sand instrument is dragged for to negative pressure |
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| Publication Number | Publication Date |
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| CN204899825U true CN204899825U (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520680137.6U Active CN204899825U (en) | 2015-09-06 | 2015-09-06 | Sand instrument is dragged for to negative pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201438A (en) * | 2015-09-06 | 2015-12-30 | 新疆格瑞迪斯石油技术股份有限公司 | Negative-pressure sand fishing tool and negative-pressure sand fishing technology |
| CN106050642A (en) * | 2016-08-14 | 2016-10-26 | 山西风雷钻具有限公司 | Liquid-operated screw pump |
| CN106437584A (en) * | 2016-10-28 | 2017-02-22 | 西南石油大学 | Negative-pressure-type continuous sand-bailing device |
-
2015
- 2015-09-06 CN CN201520680137.6U patent/CN204899825U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201438A (en) * | 2015-09-06 | 2015-12-30 | 新疆格瑞迪斯石油技术股份有限公司 | Negative-pressure sand fishing tool and negative-pressure sand fishing technology |
| CN106050642A (en) * | 2016-08-14 | 2016-10-26 | 山西风雷钻具有限公司 | Liquid-operated screw pump |
| CN106050642B (en) * | 2016-08-14 | 2019-06-25 | 山西风雷钻具有限公司 | Surge screw pump |
| CN106437584A (en) * | 2016-10-28 | 2017-02-22 | 西南石油大学 | Negative-pressure-type continuous sand-bailing device |
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