CN203515364U - Drag reduction tool - Google Patents
Drag reduction tool Download PDFInfo
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- CN203515364U CN203515364U CN201320320174.7U CN201320320174U CN203515364U CN 203515364 U CN203515364 U CN 203515364U CN 201320320174 U CN201320320174 U CN 201320320174U CN 203515364 U CN203515364 U CN 203515364U
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- valve plate
- pipe nipple
- rotor
- pressure
- vibration pipe
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Abstract
A drag reduction tool belongs to the technical field of petroleum and natural gas drilling. A bearing system is connected under a valve of a power part; a vibration shirt piece is connected under the power part; a rotator of the power part is connected with a stator; the valve comprises a moving valve block and a static valve block; the bearing system is connected with the moving valve block and the static valve block; and a dabber is connected with a spring and a piston. By the use of the drag reduction tool, frictional resistance between an under well drilling tool assembly and a borehole can be reduced, so mechanical drilling speed can be effectively improved, drilling period can be shorted and drilling cost can be reduced.
Description
Technical field
The utility model relates to a kind of friction reducer, belongs to petroleum and natural gas drilling technology field.
Background technology
Along with the quantity of the complex structural wells such as China each elephant exploitation high angle hole, horizontal well and horizontal branch well is more and more, how effectively to drill bit, to apply the pressure of the drill just becomes people's question of common concern.Yet in the construction of the large well section of hole deviation, there is backing pressure, sticky card phenomenon, especially in slip drilling process, cannot guarantee to drill bit apply truly, effective the pressure of the drill, this has become the principal element that affects full well average rate of penetration and drilling period.
Drilling well at present is mainly crept into two kinds by compound drilling and the slip of well dynamic instrument and is crept into mode.Because these labyrinth well journey hydraulic loss increase, shaft bottom drill bit available water horsepower is quite low, is all generally to drill bit, to apply the pressure of the drill fractured rock by drill string gravity.Yet in high angle hole and horizontal well construction, this traditional pressure method is subject to certain restrictions: 1, because hole deviation is larger, drill string gravity is little or be approximately 0 at the component of well direction, is difficult to meet the pressure of the drill of design in advance; 2, because drill string deadweight is large to the normal pressure of the borehole wall, increase the frictional resistance of drilling tool on the borehole wall, thereby restricted on drill bit, apply effective the pressure of the drill.
Level and smooth stable load transfer even can make drilling assembly bore to the adjustment capability at PDC bit tool face angle and reach tighter target zone after the azimuthal variation through excessive in bad ground; And in drilling process, do not need too much work to adjust drilling tool, can reach soon the torsion of tool face azimuth, the maintenance of tool face azimuth, obviously improves rate of penetration, time saving and energy saving.Given this, each main petroleum equipment company of the world and each oil field have all been strengthened can effectively transmitting the research of the pressure of the drill class instrument and producing and drop into.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of friction reducer, can effectively improve rate of penetration, shortens drilling period.
In order to solve the problem of prior art, the utility model is by special design and structure, longitudinal reciprocating motion that instrument self produces improves the validity of load transfer in drilling process and reduces the frictional resistance between DHA and well, the utility model can be for all drill mode, particularly in carrying out directional drilling process, improves use helicoid hydraulic motor the transmission of the pressure of the drill, reduce twisting vibration, thereby effectively improve rate of penetration, shorten drilling period.
A friction reducer, the valve below connection bearing system of power part, the below of power section connects vibration pipe nipple, the rotor of power section is connected with stator, valve comprises moving valve plate and quiet valve block, and bearing arrangement connects moving valve plate and quiet valve block, mandrel linking springs and piston.
The rotor of motor, stator specific lobe are 1:2.
A friction reducer, when fluid is during by power section, drives rotor to rotate, and due to the characteristic of single screw motor, end moves back and forth in the plane at valve place; What be connected with power section is valve and bearing arrangement, valve critical piece is moving valve plate and fixed valve plate, moving valve plate and fixed valve plate closely cooperate, rotation due to rotor, cause two valve blocks to be staggered and to overlap, thereby cause the pressure at upper reaches to change, periodic relative motion causes flow through sectional area cycle of instrument of fluid to change (maximum value and minimum value); Moving valve plate and fixed valve plate coincidence area hour, because the sectional area of fluid by instrument be minimum, so by just producing a maximum Pressure Drop after instrument; Moving valve plate overlaps with fixed valve plate is maximum, and now fluid is maximum by sectional area, so the pressure drop producing is minimum; Sectional area cyclically-varying causes the synchronous cycle of upstream pressure to change;
The variation of pressure cycle of the fluid by vibration pipe nipple, act on the piston area of vibration pipe nipple, the piston of vibration pipe nipple is under the double action of pressure and spring, and axially upper reciprocating motion, has realized the downhole tool being connected with Novel drag reduction instrument and moved back and forth.
Power section 1 is comprised of the screw motor of 1:2 head, and under the effect of fluid, rotor is done planetary motion, and the motion at Rotor terminal is straight reciprocating motion like this.
Periodically variable pressure-acting is on vibration pipe nipple, and vibration pipe nipple constantly compresses its inherent spring and forms vibration.
The utility model has the advantages that the longitudinal reciprocating motion producing by self improves the validity of load transfer in drilling process, reduce the frictional resistance between DHA and well, particularly in having the directional drilling process of helicoid hydraulic motor, improve the transmission of the pressure of the drill, reduce frictional resistance, thereby effectively improve rate of penetration, shorten drilling period, save drilling cost.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to below, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model is used for explaining the utility model, do not form improper restriction of the present utility model, as schemed wherein:
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is power section schematic diagram of the present utility model.
Fig. 3 is valve of the present utility model and bearing arrangement structural representation.
Fig. 4 is vibration pipe nipple schematic diagram of the present utility model.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
The specific embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present utility model belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of friction reducer, is mainly comprised of with bearing arrangement 3 and vibration pipe nipple 4 power section 1, valve 2.The DHA that rigidity is strong will be used vibration pipe nipple 4; The flexible strong DHA pipe nipple 4 that can vibrate.
A kind of friction reducer, the valve 2 below connection bearing systems 3 of power section 1, the below of power section 1 connects vibration pipe nipple 4, the rotor 5 of power section 1 is connected with stator 11, valve 2 comprises moving valve plate 6 and quiet valve block 7, bearing arrangement 3 connects moving valve plate 6 and quiet valve block 7, mandrel 10 linking springs 8 and piston 9.
Motor comprises rotor 5 stators 11.
It is 1:2 that the Alignment Design of motor is selected rotor 4, stator 11 specific lobes, has guaranteed to meet the fluid motor part of flowing through, rotor planetary motion, Rotor terminal straight reciprocating motion.The design of rotor, the linear parameter of stator has guaranteed that the rectilinear motion of the moving valve plate that rotor is connected will have enough strokes, and the moving valve plate being connected with rotor moves in the effective area of fixed valve plate, the more important thing is the pressure change frequency that has guaranteed the design when certain fluid flow.
The design of piston area and the design of spring 8 of vibration pipe nipple 4, can guarantee to be delivered to vibration pipe nipple when pressure, the piston of vibration pipe nipple is just under the promotion of pressure and spring force, drive the mandrel 10 of vibration pipe nipple to move upward, when pressure reduces to be, the mandrel 10 reset Compress Springs of vibration pipe nipple.Thereby realize when such pressure cycle variation, vibration pipe nipple mandrel 10 is realized reciprocal axial motion, makes other downhole tools that are connected with the pipe nipple 4 that vibrates make reciprocal axial motion.
Consult Fig. 1.Fluid ultromotivity part 1 upper end flows into, the rotor of motor drives moving valve plate 6 to carry out rectilinear motion, cause two valve blocks to be staggered and to overlap, thereby cause fluid to flow through that the overflow section of moving valve plate 6 and quiet valve block 7 is long-pending, and variation just occurred, so just cause the pressure at upper reaches to change, periodic relative motion causes flow through sectional area cycle of instrument of fluid to change (maximum value and minimum value).Moving valve plate 6 is during with minimum coincidence of quiet valve block 7, and because the sectional area of fluid by instrument be minimum, fluid just produces a maximum Pressure Drop after by instrument; Moving valve plate overlaps with quiet valve block is maximum, and now fluid is maximum by sectional area, and the pressure drop of generation is minimum.Sectional area cyclically-varying causes the synchronous cycle of upstream pressure to change.When pressure is delivered to vibration pipe nipple 4, the piston 9 of vibration pipe nipple 4 just, under the promotion of pressure and spring force, drives the mandrel of vibration pipe nipple to move upward, when pressure reduces to be, and the mandrel 10 reset Compress Springs 8 of vibration pipe nipple 4.Thereby realize when such pressure cycle variation, mandrel 10 is realized reciprocal axial motion, makes other downhole tools that are connected with the pipe nipple that vibrates make reciprocal axial motion.
Described Novel drag reduction instrument comprises that power section 1, valve 2 form with bearing arrangement 3 and vibration pipe nipple 4.Power section is comprised of the screw motor of 1:2, when fluid is during by power section, drives rotor 5 to rotate, and due to the characteristic of single screw motor, end moves back and forth in the plane at valve 2 places.What be connected with power section is valve 2 and bearing arrangement 3, critical piece is exactly moving valve plate 6 and fixed valve plate 7, moving valve plate 6 and fixed valve plate 7 closely cooperate, rotation due to rotor 5, cause two valve blocks to be staggered and to overlap, thereby cause the pressure at upper reaches to change, periodic relative motion causes flow through sectional area cycle of instrument of fluid to change (maximum value and minimum value).Moving valve plate 6 and fixed valve plate 7 coincidence areas hour, because the sectional area of fluid by instrument be minimum, so by just producing a maximum Pressure Drop after instrument; Moving valve plate overlaps with fixed valve plate is maximum, and now fluid is maximum by sectional area, so the pressure drop producing is minimum.Sectional area cyclically-varying causes the synchronous cycle of upstream pressure to change.
The variation of pressure cycle of the fluid by vibration pipe nipple 4, act on 9, the piston of vibration pipe nipple, the piston 9 of vibration pipe nipple 4 just, under the double action of pressure and spring 8, axially above moves back and forth, thereby has realized the reciprocating object of the downhole tool being connected with Novel drag reduction instrument.
Consult Fig. 2.It is 1:2 that rotor 5, stator 11 specific lobes are selected in power section 1, has guaranteed to meet the fluid power section 1 of flowing through, rotor 5 planetary motions, rotor 5 end straight reciprocating motions.
Consult Fig. 3.Moving valve plate 6, quiet valve block 7 and bearing arrangement 3 adopt shock resistance, high-abrasive material, and effectively bear rotor 5 is passed to the hydraulic load of moving valve plate 6, quiet valve block 7, and the abrasion resistance of moving valve plate 6 linear reciprocating motion on quiet valve block 7.The design of moving valve plate 6, quiet valve block 7 flowing holes, can meet it and closely cooperate, and can realize area of passage cyclically-varying maximum value and minimum value in moving valve plate 6 rectilinear motion processes.
Consult Fig. 4.The spring 8 of vibration pipe nipple 4 designs with the area of piston 9, can guarantee to be delivered to vibration pipe nipple when pressure, the piston 9 of vibration pipe nipple just, under the effect of pressure and spring 8 thrusts, drives the mandrel 10 of vibration pipe nipple to move upward, when pressure reduces, the mandrel 10 reset Compress Springs 8 of vibration pipe nipple.Thereby realize when such pressure cycle variation, vibration pipe nipple mandrel 10 is realized reciprocal axial motion, makes other downhole tools that are connected with the pipe nipple 4 that vibrates make reciprocal axial motion.
As mentioned above, embodiment of the present utility model is explained, but as long as not departing from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation is also all included in protection domain of the present utility model.
Claims (2)
1. a friction reducer, is characterized in that: the valve below connection bearing system of power part, the below connection vibration pipe nipple of power section, the rotor of power section is connected with stator, valve comprises moving valve plate and quiet valve block, and bearing arrangement connects moving valve plate and quiet valve block, mandrel linking springs and piston;
Driving rotor rotates, and drives Rotor terminal to move back and forth in the plane at valve place; What be connected with the driving rotor of power section is valve and bearing arrangement, and moving valve plate and fixed valve plate closely cooperate, and due to the rotation of rotor, causes moving valve plate and fixed valve plate to be staggered and to overlap,
When pressure is delivered to vibration pipe nipple, the piston of vibration pipe nipple, under the promotion of pressure and spring force, drives the mandrel of vibration pipe nipple to move upward, when pressure reduces, and the mandrel reset Compress Spring of vibration pipe nipple.
2. a kind of friction reducer according to claim 1, is characterized in that: the rotor of motor, stator specific lobe are 1:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320320174.7U CN203515364U (en) | 2013-06-05 | 2013-06-05 | Drag reduction tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320320174.7U CN203515364U (en) | 2013-06-05 | 2013-06-05 | Drag reduction tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515364U true CN203515364U (en) | 2014-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320320174.7U Expired - Fee Related CN203515364U (en) | 2013-06-05 | 2013-06-05 | Drag reduction tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203515364U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481401A (en) * | 2015-01-05 | 2015-04-01 | 西南石油大学 | Novel petroleum and natural gas underground anti-friction and resistance-reduction device |
-
2013
- 2013-06-05 CN CN201320320174.7U patent/CN203515364U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481401A (en) * | 2015-01-05 | 2015-04-01 | 西南石油大学 | Novel petroleum and natural gas underground anti-friction and resistance-reduction device |
| CN104481401B (en) * | 2015-01-05 | 2016-08-17 | 西南石油大学 | A kind of nonpetroleum and antifriction device under the natural gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20140402 |