CN107227940B - A kind of bidirectional pulse generator for underground - Google Patents
A kind of bidirectional pulse generator for underground Download PDFInfo
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- CN107227940B CN107227940B CN201610180128.XA CN201610180128A CN107227940B CN 107227940 B CN107227940 B CN 107227940B CN 201610180128 A CN201610180128 A CN 201610180128A CN 107227940 B CN107227940 B CN 107227940B
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- center tubes
- annular space
- liquid storage
- storage chamber
- underground
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The present invention relates to a kind of bidirectional pulse generators for underground, comprising: center tubes have the feed pathway for liquid flowing in the internal structure of the center tubes；Outer housing, the outer housing are set in the outside of the center tubes, and annular space is configured between the internal perisporium of the outer housing and the periphery wall of the center tubes, and the annular space is connected with the feed pathway；And it is sequentially sleeved at upper piston component and lower piston component on the periphery wall of the center tubes, wherein the close to each other and movement being located remotely from each other that the upper piston component and the lower piston component can synchronize under the action of fluid pressure.The bidirectional pulse generator has the advantages that wave crest pressure can be eliminated and reduces tubing string surge.
Description
Technical field
The present invention relates to oil development technical field more particularly to a kind of bidirectional pulse generators for underground.
Background technique
During oil field development water filling, it usually needs guarantee constant high pressure water flow.Since oil reservoir is with heterogeneous
Property, therefore, general long-term water filling will form water filling feed pathway, and the recovery ratio filled the water in feed pathway is very high, but non-wave
And the recovery ratio of oil reservoir can be very low, consider the economy of oil field development, need to improve final recovery ratio.
The method generallyd use is the viscosity etc. for blocking original water flow feed pathway or increasing injection water, but all has one
Fixed limitation.Wherein, original water flow feed pathway is blocked often because the intensity for blocking feed pathway is too high, and oil reservoir is caused to be sealed
Stifled, intensity is too low, cannot effectively block.Increase the viscosity of injection water, so that the viscosity of injection water is close with crude oil, in oil
Layer is formed and is promoted comprehensively, and improves recovery ratio, this method efficiency is lower, and cost is too high.The fifties in last century shake wave technology by
Step application, obtains preferable application effect, and pulse water flooding is one of them key technology, obtains in the application of each elephant
It breaks through.
However, using the above method, that is, during pulse water flooding, often there is water filling pulse pair tubing string and envelope
Impact damage is led to the problem of every device.
Summary of the invention
In view of the above-mentioned problems, proposing a kind of bidirectional pulse generator for underground according to the present invention, comprising: central tube
Body has the feed pathway for liquid flowing in the internal structure of the center tubes；Outer housing, the outer housing are set in described
The outside of center tubes is configured with annular space between the internal perisporium of the outer housing and the periphery wall of the center tubes, described
Annular space is connected with the feed pathway；And the upper piston component on the periphery wall of the center tubes is sequentially sleeved at under
Piston component, wherein what the upper piston component and the lower piston component can synchronize under the action of fluid pressure
Movement that is close to each other and being located remotely from each other.The moment of movement, the upper piston are located remotely from each other in upper piston component and lower piston component
Component and lower piston component can generate vibration to the center tubes respectively.Due to the movement side of upper piston component and lower piston component
To on the contrary, thus, to center tubes generate vibration will offset each other, to significantly reduce to center tubes
The impact damage for shaking, reducing impulse wave to center tubes.
In one embodiment, the bidirectional pulse generator further includes being located in the annular space and being set in the center
The annular space is divided into upper annular space and lower annular space by the demarcation plate of the intermediate region of the periphery wall of tube body, the demarcation plate.
In one embodiment, the upper piston component is located in the upper annular space, and the lower piston component is located at described
In lower annular space.
In one embodiment, the bidirectional pulse generator further includes being set in the upper end of the center tubes and capable of sealing
The upper plate of the upper annular space is blocked up, and is set in the lower end of the center tubes and the lower roof plate of the lower annular space can be blocked.
In one embodiment, the upper piston component includes being set on the periphery wall of the center tubes and can be along institute
The axial direction for stating center tubes carries out mobile upper piston, and the upper annular space is divided into the first liquid storage chamber and second by the upper piston
Liquid storage chamber.
In one embodiment, the upper piston component further includes that can separate the upper plate and the upper piston
Upper baffle ring, the upper baffle ring are located in first liquid storage chamber and are set on the periphery wall of the center tubes.
In one embodiment, the upper piston component further includes upper elastic component, and the upper elastic component is located at described
In second liquid storage chamber and it is set on the periphery wall of the center tubes, one end of the upper elastic component and the demarcation plate phase
It abuts, the other end is abutted against with the upper piston.
In one embodiment, being configured with energy at the position of the correspondence of the center tubes first liquid storage chamber will be described
The enterprising fluid through-hole that first liquid storage chamber is connected with the feed pathway.
In one embodiment, there is upper fluid through-hole out in the regional structure of the correspondence of the outer housing upper annular space.
In one embodiment, the lower piston component includes being set on the periphery wall of the center tubes and can be along institute
The axial direction for stating center tubes carries out mobile lower piston, and the lower annular space is divided into third liquid storage chamber and the 4th by the lower piston
Liquid storage chamber.
In one embodiment, the lower piston component further includes that can separate the lower roof plate and the lower piston
Lower baffle ring, the lower baffle ring are located in the 4th liquid storage chamber and are set on the periphery wall of the center tubes.
In one embodiment, the lower piston component further includes lower elastic component, and the lower elastic component is located at described
In third liquid storage chamber and it is set on the periphery wall of the center tubes, one end of the lower elastic component and the demarcation plate phase
It abuts, the other end is abutted against with the lower piston.
In one embodiment, being configured with energy at the position of the correspondence of the center tubes the 4th liquid storage chamber will be described
The lower feed liquor through-hole that 4th liquid storage chamber is connected with the feed pathway.
In one embodiment, there is lower fluid through-hole out in the regional structure of the correspondence of the outer housing lower annular space.
Compared with prior art, according to the application, in pulse water flooding, pulsed pressure wave by it is above-mentioned it is upper go out fluid through-hole and
Go out fluid through-hole down and conduct and enter in stratum, to expand the range involved, improve oil displacement efficiency.However, impulse wave centering
Heart tube body has destruction.It is destroyed to eliminate, needs to eliminate fluctuation pressure wave crest, reduces vibration.The present invention is by two-way
The movement close to each other and separate of elastic component and lower elastic component, it is anti-to push corresponding upper piston and lower piston to carry out respectively
To movement, damaged due to the movement of upper piston and lower piston to center tubes bring to reach elimination.
In addition, the fluid through-hole that goes out due to the application is even number, i.e., respectively above-mentioned upper fluid through-hole out and lower liquid out are logical
Hole, thus can be effectively avoided as part go out fluid through-hole be closed and caused by instantaneous pressure wave crest.It can be seen that this Shen
Bidirectional pulse generator please is able to maintain the pressure wave crest impact force of its external oil reservoir, meanwhile, occur in the bidirectional pulse
The inside of device, which can also effectively be eliminated, to be impacted caused by pressure wave crest centering heart tube body, greatly reduces and make to center tubes
At destruction probability.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.In figure:
Fig. 1 is the overall structure diagram of the bidirectional pulse generator for underground of embodiments herein.
In the accompanying drawings, identical component uses identical appended drawing reference.Attached drawing is not according to actual scaling.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
As shown in Figure 1, Fig. 1 schematically show the bidirectional pulse generator 100 include center tubes 1, outer housing 2,
Upper piston component 4 and lower piston component 5.
The center tubes 1 are substantially tubular, there is the feed pathway that can be flowed for liquid in the internal structure of the center tubes 1
11.At work, the left end of the center tubes 1 diagram for its work upper end, the right end of diagram for its work lower end.Its
In, fluid can be flowed into from the left end of the center tubes 1, and flow out to be flowed into and the center from the right end of the center tubes 1
In the connected oil pipe (not shown) of tube body 1.
Outer housing 2 is set in the outside of center tubes 1, in the internal perisporium 21 of outer housing 2 and the periphery wall 12 of center tubes 1
Between be configured with annular space 3, which is connected with feed pathway 11.In this way, the fluid flowed through in the feed pathway 11 will flow
Enter into the annular space 3.
The upper piston component 4 and lower piston component 5 are sequentially sleeved on the periphery wall 12 of center tubes 1, wherein work on this
The close to each other and movement being located remotely from each other that plug assembly 4 and lower piston component 5 can synchronize under the action of fluid pressure.
In this way, when the upper piston component 4 and lower piston component 5, which are moved toward one another to annular space 3, to be connected with the external world of outer housing 2,
Fluid pressure in the annular space 3 can decline rapidly, will form impulse wave in the moment declined rapidly, which can act on to this
A certain size the fluctuation pressure of center tubes 1.
When the upper piston component 4 and 5 counter motion of lower piston component to apart from it is nearest when, fluid pressure meeting in annular space 3
It is reduced to minimum, fluctuation pressure at this time can also be reduced to minimum, which can be in trough state.
Since above-mentioned fluctuation pressure has fallen to minimum, the fluid pressure in annular space 3 can be with the outside of outer housing 2 at this time
Formation pressure be in the state that mutually balances, at this time the upper elastic component 43 of upper piston component 4 as described below and under
Under the action of the elastic restoring force of the lower elastic component 53 of piston component 5, the upper piston component 4 and lower piston component 5 can occur
Mutual separate movement.However, the upper piston component 4 and lower piston component 5 can be respectively to these in the moment for being located remotely from each other movement
Center tubes 1 generate vibration.However, due to the direction of motion of upper piston component 4 and lower piston component 5 on the contrary, thus, to center
The vibration that tube body 1 generates will be offset each other, to significantly reduce the vibration to center tubes 1, greatly reduce
The pressure of liquid in annular space 3 reduces impulse wave to the impact damage of center tubes 1.
As shown in Figure 1, the bidirectional pulse generator 100 further includes interior positioned at annular space 3 and is set in the periphery of center tubes 1
Above-mentioned annular space 3 is divided into upper annular space 31 and lower annular space 32 by the demarcation plate 6 of the intermediate region of wall 12, the demarcation plate 6.Wherein, should
Demarcation plate 6 can be fixed on by welding on the periphery wall 12 of the center tubes 1, which can be middle with hole
Round demarcation plate.
In one embodiment, annular space 31 and lower annular space 32 are mutually indepedent and opposing seal annular space on this.
The upper piston component 4 is located in upper annular space 31, which is located in lower annular space 32.
The bidirectional pulse generator 100 further includes the upper top for being set in the upper end of center tubes 1 and capable of blocking annular space 31
Plate 7.The upper plate 7 can be fixed on the upper end of the center tubes 1 by way of welding or being threadedly coupled.It is readily appreciated that, on this
The fixed form of top plate 7 is not limited to above two mode, can also be fastened on this by fasteners such as bolt, screw or rivets
The upper end of center tubes 1.Meanwhile to ensure the opposing seal in upper annular space 31, need that bolt, screw or rivet are being installed
Position carries out corresponding encapsulation process.
As shown in Figure 1, the upper piston component 4 includes being set on the periphery wall 12 of center tubes 1 and can be along center tubes 1
Axial direction carry out mobile upper piston 41, which is divided into the first liquid storage chamber 311 and the second liquid storage chamber for upper annular space 31
312.Wherein, which can be used to accommodate the fluid flowed into from feed pathway 11.Second liquid storage chamber 312 can be used
To accommodate the external fluid flowed into from outer housing 2.
As shown in Figure 1, the upper piston component 4 further includes the upper baffle ring 42 that can separate upper plate 7 and upper piston 41, it should
Upper baffle ring 42 is located in the first liquid storage chamber 311 and is set on the periphery wall 12 of central tube 1.Wherein, which can pass through
Welding or the mode being threadedly coupled are fixed on the periphery wall 12 of center tubes 1.
In one embodiment, which includes 421 He of outward flange being set on the periphery wall 12 of center tubes 1
The axle sleeve 422 being connected with the outward flange 421.Wherein, the internal perisporium of the outward flange 421 and the periphery wall 12 of center tubes 1 are tight
Closely connected conjunction is then configured to space a between the internal perisporium of the axle sleeve 422 and the periphery wall 12 of center tubes 1.In this way, can guarantee
The fluid for flowing through above-mentioned feed pathway 11 can be flowed into a of the space.Liquid with the continuous injection of fluid, in a of the space
Pressure can be gradually increased, thus to push upper piston 41 to carry out sufficient preparation.
As shown in Figure 1, the upper piston component 4 further includes upper elastic component 43, elastic component 43 is located at the second liquid storage on this
In chamber 312 and it is set on the periphery wall 12 of center tubes 1, one end 43a of elastic component 43 is abutted against with demarcation plate 6 on this,
Other end 43b is abutted against with upper piston 41.The setting of elastic component 43 on this, enables to upper piston 41 to be resetted.
In one embodiment, elastic component 43 can be spring or the other component with reset function on this.
It can be by the first liquid storage chamber 311 as shown in Figure 1, being configured at the position of the first liquid storage chamber of correspondence 311 of center tubes 1
The enterprising fluid through-hole 13 being connected with feed pathway 11.Specifically, corresponding first liquid storage in position which is arranged
Above-mentioned space a in chamber 311.In this way, just can guarantee that the fluid flowed through in the feed pathway 11 can enter in a of space, with
The continuous increase of the volume of the fluid of injection, the fluid pressure in a of the space are also gradually increased.In the process, with liquid
The continuous increase of pressure will gradually push upper piston 41 along the axial towards the direction of lower piston 51 as described below of center tubes 1
It is moved.
The regional structure of annular space 31 has upper fluid through-hole 22 out in the correspondence of the outer housing 2.In this way, in above-mentioned upper piston 41
It is moved to after crossing above-mentioned upper fluid through-hole 22 out, just realizes the connection of the outside of the outer housing 2 and the inside of center tubes 1,
At this point, the fluid pressure in the first liquid storage chamber 311 gradually decreases, the balance of external and internal pressure is realized.
As shown in Figure 1, the lower piston component 5 includes being set on the periphery wall 12 of center tubes 1 and can be along center tubes 1
Axial direction carry out mobile lower piston 51, which is divided into third liquid storage chamber 321 and the 4th liquid storage chamber for lower annular space 32
322.Wherein, the 4th liquid storage chamber 322 can be used to accommodate the fluid flowed into from feed pathway 11.The third liquid storage chamber 321 can be used
To accommodate the external fluid flowed into from outer housing 2.
The lower piston component 5 further includes the lower baffle ring 52 that can separate lower roof plate 8 and lower piston 51, the lower baffle ring 52
In in the 4th liquid storage chamber 322 and be set in center tubes 1 periphery wall 12 on.Due to the set-up mode of lower baffle ring 52, structure shape
Shape and play the role of with the set-up mode of upper baffle ring 42, planform and play the role of it is identical, for save length
For the sake of, this is no longer described in detail.
In one embodiment, which includes 521 He of outward flange being set on the periphery wall 12 of center tubes 1
The axle sleeve 522 being connected with the outward flange 521.Wherein, the internal perisporium of the outward flange 521 and the periphery wall 12 of center tubes 1 are tight
Closely connected conjunction is then configured to space b between the internal perisporium of the axle sleeve 522 and the periphery wall 12 of center tubes 1.In this way, can guarantee
The fluid for flowing through above-mentioned feed pathway 11 can be flowed into the b of the space.Liquid with the continuous injection of fluid, in the b of the space
Pressure can be gradually increased, thus to push lower piston 51 to carry out sufficient preparation.It is readily appreciated that, the upper piston 41 in the application
It can be moved synchronously with lower piston 51, that is, can be synchronously carried out under the action of fluid pressure close to each other and mutual
Separate movement.
As shown in Figure 1, the lower piston component 5 further includes lower elastic component 53, which is located at third liquid storage
In chamber 321 and it is set on the periphery wall 12 of center tubes 1, one end 53a and the demarcation plate 6 of the lower elastic component 53 abut against,
Other end 53b is abutted against with lower piston 51.The setting of the lower elastic component 53, enables to lower piston 51 to be resetted.
In one embodiment, which can be spring or the other component with reset function.
Being configured at the position of the 4th liquid storage chamber 322 of correspondence of center tubes 1 can be by the 4th liquid storage chamber 322 and feed pathway
The 11 lower feed liquor through-holes 14 being connected.Specifically, upper in corresponding 4th liquid storage chamber 322 in position which is arranged
Space b is stated, in this way, just can guarantee that the fluid flowed through in the feed pathway 11 can enter in the b of space, with the fluid of injection
The continuous increase of volume, the fluid pressure in the b of the space are also gradually increased.In the process, with the continuous increasing of fluid pressure
Greatly, lower piston 51 will be gradually pushed to move along the axial of center tubes 1 towards the direction of above-mentioned upper piston 41.It is readily appreciated that,
Since upper annular space 31 and lower annular space 32 are arranged in adjacent formula, thus, flowing through the fluid in feed pathway 11 is almost the same time
It separately flows into the first liquid storage chamber 311 and the 4th liquid storage chamber 322, in this way, can guarantee upper piston 41 and lower piston 51
It moves synchronously.
The regional structure of annular space 32 has lower fluid through-hole 23 out under the correspondence of the outer housing 2.In this way, in above-mentioned lower piston 51
It is moved to after crossing above-mentioned lower fluid through-hole 23 out, just realizes the connection of the outside of the outer housing 2 and the inside of center tubes 1,
At this point, the fluid pressure in the 4th liquid storage chamber 322 gradually decreases, the balance of external and internal pressure is realized.
The specific course of work of bidirectional pulse generator 100 of the application is to install the two-way arteries and veins in pulse water flooding position
Generator 100 is rushed, the feed pathway 11 in the center tubes 1 can be flowed through by the water that water injecting pump injects, to successively be flowed into
In first liquid storage chamber 311 and the 4th liquid storage chamber 322.With the continuous increase of the volume of the water of injection, 311 He of the first liquid storage chamber
Fluid pressure in 4th liquid storage chamber 322 is gradually increased, when the fluid pressure in the first liquid storage chamber 311 is greater than formation pressure and upper
Fluid pressure in the elastic force of elastic component 42 and second liquid storage chamber 322 is greater than formation pressure and lower elastic component 52
When elastic force, upper elastic component 42 and lower elastic component 52 will gradually be compressed, and upper piston 41 and lower piston 51 are simultaneously to centre
Movement.
Fluid through-hole 22 out is crossed when upper piston 41 is moved to, lower piston 51 is also moved to simultaneously crosses down fluid through-hole 23 out
When, the first liquid storage chamber 311 and the 4th liquid storage chamber 322 realize the connection with the outside of outer housing 2 and feed pathway 11.This
Sample, the fluid pressure in the first liquid storage chamber 311 and the 4th liquid storage chamber 322 gradually decreases, to form impulse wave.
When the fluid pressure in above-mentioned first liquid storage chamber 311 is equal to the elastic force of upper elastic component 43, the 4th liquid storage chamber 322
In fluid pressure when being equal to the elastic force of lower elastic component 53, the upper piston 41 and lower piston 51 can be transported to opposite direction simultaneously
It is dynamic, that is, the movement that the upper piston 41 and lower piston 51 are located remotely from each other.At this point, can be to central tube in the moment being located remotely from each other
Body 1 generates biggish impact force, however, since upper piston 41 and lower piston 51 are bi-directional symmetrical, the pressure generated by impulse wave
Peak value can be cancelled out each other due to the contrary of the two, to effectively reduce vibration to damage caused by center tubes 1.
In conclusion pulsed pressure wave passes through above-mentioned upper fluid through-hole 22 out and lower fluid through-hole 23 out in pulse water flooding
Conduction enters in stratum, to expand the range involved, improve oil displacement efficiency.However, impulse wave has destruction to center tubes 1
Effect.It is destroyed to eliminate, needs to eliminate fluctuation pressure wave crest, reduces vibration.The present invention is just by two-way upper elastic component 43
With the close to each other of lower elastic component 53 and far from movement, to push corresponding upper piston 41 and lower piston 51 to carry out reversely respectively
Movement damages due to the movement of upper piston 41 and lower piston 51 to 1 bring of center tubes to reach elimination.
In addition, the fluid through-hole that goes out due to the application is even number, i.e., respectively above-mentioned upper fluid through-hole 22 out and lower liquid out
Through-hole 23, thus can be effectively avoided as part go out fluid through-hole be closed and caused by instantaneous pressure wave crest.It can be seen that
The bidirectional pulse generator 100 of the application is able to maintain the pressure wave crest impact force of its external oil reservoir, meanwhile, in the two-way arteries and veins
The inside for rushing generator 100, which can also effectively be eliminated, to be impacted caused by pressure wave crest centering heart tube body 1, greatly reduces pair
Probability is destroyed caused by center tubes 1.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (14)
1. a kind of bidirectional pulse generator for underground, comprising:
Center tubes have the feed pathway for liquid flowing in the internal structure of the center tubes；
Outer housing, the outer housing are set in the outside of the center tubes, internal perisporium and the center in the outer housing
Annular space is configured between the periphery wall of tube body, the annular space is connected with the feed pathway；And it is sequentially sleeved in described
Upper piston component and lower piston component on the periphery wall of heart tube body, wherein the upper piston component and the lower piston component
The close to each other and movement being located remotely from each other that can be synchronized under the action of fluid pressure.
2. the bidirectional pulse generator according to claim 1 for underground, which is characterized in that the bidirectional pulse occurs
Device further includes interior positioned at the annular space and is set in the demarcation plate of the intermediate region of the periphery wall of the center tubes, the separation
The annular space is divided into upper annular space and lower annular space by plate.
3. the bidirectional pulse generator according to claim 2 for underground, which is characterized in that upper piston component position
In in the upper annular space, the lower piston component is located in the lower annular space.
4. the bidirectional pulse generator according to claim 3 for underground, which is characterized in that the bidirectional pulse occurs
Device further includes the upper end for being set in the center tubes and the upper plate that can block the upper annular space, and is set in the center
The lower end of tube body and the lower roof plate that the lower annular space can be blocked.
5. the bidirectional pulse generator according to claim 4 for underground, which is characterized in that the upper piston component packet
Include the upper piston that can be moved on the periphery wall for being set in the center tubes and along the axial direction of the center tubes, it is described on
The upper annular space is divided into the first liquid storage chamber and the second liquid storage chamber by piston.
6. the bidirectional pulse generator according to claim 5 for underground, which is characterized in that the upper piston component is also
Including the upper baffle ring that can separate the upper plate and the upper piston, the upper baffle ring is located in first liquid storage chamber simultaneously
It is set on the periphery wall of the center tubes.
7. the bidirectional pulse generator according to claim 5 for underground, which is characterized in that the upper piston component is also
Including upper elastic component, the upper elastic component is located in second liquid storage chamber and is set in the periphery wall of the center tubes
On, one end and the demarcation plate of the upper elastic component abut against, and the other end is abutted against with the upper piston.
8. the bidirectional pulse generator according to claim 5 for underground, which is characterized in that in the center tubes
The position of corresponding first liquid storage chamber is configured with the upper feed liquor that first liquid storage chamber can be connected with the feed pathway
Through-hole.
9. the bidirectional pulse generator according to claim 2 for underground, which is characterized in that in pair of the outer housing
The regional structure of the upper annular space is answered to have upper fluid through-hole out.
10. the bidirectional pulse generator according to claim 4 for underground, which is characterized in that the lower piston component
It is described on periphery wall including being set in the center tubes and the lower piston that can be moved along the axial direction of the center tubes
The lower annular space is divided into third liquid storage chamber and the 4th liquid storage chamber by lower piston.
11. the bidirectional pulse generator according to claim 10 for underground, which is characterized in that the lower piston component
It further include the lower baffle ring that the lower roof plate and the lower piston can be separated, the lower baffle ring is located in the 4th liquid storage chamber
And it is set on the periphery wall of the center tubes.
12. the bidirectional pulse generator according to claim 10 for underground, which is characterized in that the lower piston component
It further include lower elastic component, the lower elastic component is located in the third liquid storage chamber and is set in the periphery of the center tubes
On wall, one end and the demarcation plate of the lower elastic component are abutted against, and the other end is abutted against with the lower piston.
13. the bidirectional pulse generator according to claim 10 for underground, which is characterized in that in the center tubes
Correspondence the 4th liquid storage chamber position be configured with the 4th liquid storage chamber can be connected with the feed pathway under into
Fluid through-hole.
14. the bidirectional pulse generator according to claim 2 for underground, which is characterized in that in the outer housing
The regional structure of the corresponding lower annular space has lower fluid through-hole out.
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| CN107227940A (en) | 2017-10-03 |
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