CN1099456A - Automatic pressure unit - Google Patents
Automatic pressure unit Download PDFInfo
- Publication number
- CN1099456A CN1099456A CN 93116601 CN93116601A CN1099456A CN 1099456 A CN1099456 A CN 1099456A CN 93116601 CN93116601 CN 93116601 CN 93116601 A CN93116601 A CN 93116601A CN 1099456 A CN1099456 A CN 1099456A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- low pressure
- pressure
- valve
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The automatic booster is composed of casing with top and bottom joints, motor-driven guide valve, elongated limit bar, low-pressure cylinder, boosting cylinder and one-way valves. The slurry from slurry pump is divided in annular space into three ways, and one of them drives low-pressure cylinder. Minority slurry flows into boosting cylinder and then is jetted from small holes of drill to stratum, and the rest is jetted from the big holes of drill for clarifying well bottom. It features high drilling speed and low cost.
Description
The present invention relates to a kind of automatic boosting method and device, the down-hole automatic pressure unit that is used for hydraulic drilling in especially a kind of drilling technology.
At present, mainly be directly to apply the pressure of the drill in the conventional drilling process by rig, make the drill bit fractured rock, and use the ground slush pump to carry drilling fluid to purify the shaft bottom, return on the cutting carring.This boring method power consumption is big, efficient is low, and cost is higher under the situation of identical drilling depth, and especially the problems referred to above are more outstanding in deep drilling.
Now, people attempt the waterpower cutting technique is used in the churn drill well industry well drilling industry.Carried out the experiment of super-pressure aided drilling in the seventies U.S.: in this experimentation, the whole circulation mud pressure is brought up to 105MPa.Used water horse power is up to 2400, and its drilling depth has compared conventional raising 2～3 times.But, in well drilling industry, can not be widely used because its all devices need be born the pressure up to 105MPa.Early eighties U.S. Grsce Orilling company and Flow Drill company cooperate to have released in 1991 a kind of two drilling pipe bit systems of new ground supercharging.This pair of drilling pipe bit system mainly is that 2 liters/second mud is pressurized to 230MPa, and be transported to the shaft bottom by the tubule of establishing in addition in the drilling rod, and the formed annular space of drilling rod and tubule still is the flow and the pressure of conventional mud pump, final little discharge capacity of high pressure and the big discharge capacity of low pressure spray to the shaft bottom by little hydrophthalmia of drill bit and big hydrophthalmia respectively, carry out many mouthfuls of drilling wells with this complete equipment, can improve 2～3 times of bit speed at medium ground.But this system also exists complex structure, failure probability height, use inconvenience, shortcoming such as cost an arm and a leg.
At present, conventional double acting automatic pressure unit, sufficiently high tension, resistance to compression, flexural strength can not be guaranteed to bear as patented technology GK86106346, GK861055903 etc., under the situation of little between the chamber, down-hole, discharge capacity big (about 1800 liters/second), drilling well work can't be carried out.Low pressure (LP) cylinder, two pressurized cylinder in the middle of this, if be designed to tubular shape, co-structured complicated, processing technology is relatively poor, not high pressure-charging of reliability amplitude is restricted.Necessary supporting two of conventional single-cylinder dual-action pressurized cylinder sucks one way valves, discharges one way valves for two, and this structure is not only complicated, but also can cause the boosted flow of two-way travel not wait or the pressure ratio difference.Though the single-acting automatic pressure unit is simple in structure in addition, but because one-stroke supercharging, the high-pressure fluid effect stratum time of its output is short, its rock breaking efficiency must reduce, the little hydrophthalmia of drill bit can only when non pressurized stroke, need be born the mud of per minute five, six hectolitres of control low pressure (LP) cylinder work so extraly by the design of the low discharge after the supercharging in addition, handle if establish mechanism in addition, must increase the complexity of single-acting supercharging device.
The objective of the invention is to overcome above-mentioned shortcoming and provide a kind of simple in structure, the supercharging amplitude is big, energy loss is little, good seal, commutation steadily, reliable operation, life-span long, easy to use, cheap and have a down-hole automatic pressure unit that high-pressure low-flow and two strands of different flows of low pressure and mass flow spray.The present invention utilizes the part drilling fluid of ground slush pump output to be used as power, and realizes reciprocating motion, automatic reverse, single-cylinder dual-action supercharging.Under the constant situation of the conventional equipment more than the supercharging device, can be pressurized to 170MPa to 250MPa to about 1 liter/second mud, and the most of flow that allows slush pump output within it portion pass through unblockedly, the mud that reaches two strands of different pressures different flows is by the large and small hydrophthalmia ejection of drill bit, the cutting of formation high-pressure hydraulic, drill bit break rock, the big discharge capacity mud purification of low pressure well is low, with enough big speed landwaste is taken to aboveground new-type drilling rig.
Automatic supercharging mode of the present invention and device in particular for the automatic pressure unit of downhole drill, mainly include shell and last lower union joint, and it is characterized in that: it also includes:
Motor-driven pilot valve by low pressure (LP) cylinder piston control commutation, its spool afterbody has the gag lever post of lengthening, and the gag lever post of lengthening is provided with limited step;
One by motor-driven pilot valve control commutation, and then the hydraulicchange-over valve that automaticallyes switch of control low pressure (LP) cylinder;
One by above two valves combination control, and an end is provided with the low pressure (LP) cylinder of piston rod;
The pressurized cylinder of a single-cylinder dual-action that links to each other with piston rod;
The super-pressure one way valve that mud flows backwards in the time of preventing to transfer drilling rod between outlet that is positioned on pressurized cylinder and the little hydrophthalmia of drill bit;
One is positioned on the low pressure check valve that shaft bottom mud in the time of preventing from down between mud sprue and the drill bit to bore seals in supercharging device;
A drain charge one way valve that is arranged on motor-driven pilot valve, hydraulicchange-over valve and the path that the drilling tool annular space links to each other;
A pressurized cylinder that is located in the middle of the pressurized cylinder piston is discharged one way valve;
A pressurized cylinder that is located at the pressurized cylinder lower end sucks one way valve;
Above-mentioned piston rod is low pressure (LP) cylinder and pressurized cylinder coupling, and piston rod is linked in the motor-driven pilot valve gag lever post of low pressure (LP) cylinder, by piston rod high pressure cylinder, low pressure (LP) cylinder is moved in the same way.
Another feature of the present invention is: the low pressure mud from slush pump is divided into three the tunnel in annular space, and wherein about 1/3rd mud is used for controlling the commutation of motor-driven pilot valve and hydraulicchange-over valve and drives the low pressure (LP) cylinder motion; About 1 liter/second flow will be pressurized to super-pressure through pressurized cylinder, spray to the rock stratum by little hydrophthalmia with super-pressure; Remaining accounts for 2/3rds mud of slush pump output continuously from the big hydrophthalmia ejection of drill bit, with assurance there is sufficient detergent power in the shaft bottom.
The pressure medium of pressurized cylinder inlet is the segment fluid flow of pressure release in the low pressure (LP) cylinder course of work also.
The present invention compared with prior art has following characteristics:
1, can improve 1.5 to 2 times of rate of penetrations at medium ground;
2, available lower the pressure of the drill creeps into, and can extenuate the wearing and tearing of drill bit;
3, the superelevation jet bit adapts to stratigraphic type expansion, and the drill bit specification reduces, and has saved the more time of bit change that makes a trip simultaneously;
4,, can satisfy the operating mode of horizontal well and directional well, and obtain higher bit speed under the pressure of the drill condition being difficult to apply with MWD mud motor combination;
5, supporting with superhigh pressure jetting PDC drill bit, can improve 3 to 5 times to conventional drilling speed;
6, the present invention also has characteristics such as drilling cost simple in structure, cheap, easy to use, comprehensive is low.
It is following that the invention will be further described in conjunction with its accompanying drawing:
Fig. 1 is a kind of schematic diagram of the present invention;
Fig. 2 is another schematic diagram of the present invention;
A kind of structure chart of Fig. 3 for providing at Fig. 2 principle;
Fig. 4 is a schematic diagram more of the present invention;
Fig. 5 is an another schematic diagram of the present invention.
Referring to Fig. 1,2,3, automatic pressure unit of the present invention, include up and down shell 1 with connector, and further include: a motor-driven pilot valve 3 by low pressure (LP) cylinder piston control commutation, its spool afterbody has the gag lever post 5 of lengthening, the gag lever post 5 of lengthening be provided with two limited steps 16,16 '; One by the 3 control commutations of motor-driven pilot valve, and then the hydraulicchange-over valve 2 that automaticallyes switch of control low pressure (LP) cylinder; One by motor-driven pilot valve and hydraulicchange-over valve combination control, and the low pressure (LP) cylinder 4 that an end has a piston rod 6 i.e. fluid cylinder initiatively; The pressurized cylinder 8 of a single-cylinder dual-action that links to each other with piston rod 6; The super-pressure single valve 12 that mud flows backwards in the time of preventing to transfer drilling rod between outlet that is positioned on pressurized cylinder 8 and the little hydrophthalmia 13 of drill bit; One is positioned on the low pressure check valve 10 that shaft bottom mud in the time of preventing from down between mud sprue and the drill bit to bore seals in supercharging device; A drain charge one way valve 11 that is arranged on motor-driven pilot valve 3, hydraulicchange-over valve 2 and the path that the drilling tool annular space links to each other; One pressurized cylinder that is located in the middle of pressurized cylinder 8 pistons is discharged one way valve 7; A pressurized cylinder that is located at the pressurized cylinder lower end sucks one way valve 9.Above-mentioned piston rod 6 is low pressure (LP) cylinder 4 and pressurized cylinder 8 couplings, and piston rod 6 is linked in the motor-driven pilot valve gag lever post 5 of low pressure (LP) cylinder 4, by piston rod high pressure cylinder, low pressure (LP) cylinder is moved in the same way.Above-mentioned motor-driven pilot valve 3 is two-position four-way form or two-position three way form, and the motor-driven pilot valve gag lever post 5 of its spool is provided with two stroke limit steps 16; This valve is positioned on the upper end of low pressure (LP) cylinder 4 axis directions, realizes forcing transposition by two steps 16 on the piston area bump lengthening gag lever post 5 of low pressure (LP) cylinder 4.Its hydraulicchange-over valve 2 is the two-position four-way form of surging, and it cooperates with motor-driven pilot valve, controls the switching of sprue.Low pressure (LP) cylinder 4 is provided with the double acting fluid cylinder of piston rod 6 for having only the lower end, and piston and piston rod center are provided with a hole that can hold motor-driven pilot valve 3 spools lengthening gag lever post 5, according to giving the stroke of determining earlier motor-driven pilot valve 3 are controlled with spacing.Above-mentioned pressurized cylinder 8 is a single-cylinder dual-action, is connected with pressurized cylinder under it and sucks one way valve 9; Discharge one way valve 7 by pressurized cylinder on the pressurized cylinder 8, between the chamber and be connected, realize the discharge function of its mud; Pressurized cylinder is discharged one way valve 7 and can be positioned in the middle of piston and the piston rod, is positioned on the side of two fluid cylinders also capable of bypassly.
Above-mentioned described various one way valves are sphere or taper, also satisfy other form of its function.Its shell shape is for holding the cylinder diameter and the big as far as possible tubulose of pressure ratio that also can make low pressure (LP) cylinder and pressurized cylinder its all parts, that have sufficient intensity.
The present invention in use, the low pressure mud from the ground slush pump is transported to automatic pressure unit of the present invention by the conventional fire hose, drill string etc.Mud punishes into three the tunnel at G, J two, along arrow 1. flow about 1/3rd mud of direction be used for controlling the commutation of motor-driven pilot valve 3 and hydraulicchange-over valve 2 and drive the low pressure (LP) cylinder motion; Along arrow 2. about 1 liter/second flow will be pressurized to super-pressure through pressurized cylinder 8; 2. 2/3rds mud that account for slush pump output that distribute along arrow spray from the big hydrophthalmia 14 of drill bit 15 continuously, to guarantee that there is sufficient detergent power in the shaft bottom.Referring to Fig. 1, figure mesolow cylinder 4 moves and forward near terminal point, at this moment, enter the b chamber of low pressure (LP) cylinder 4 through the P ' B ' of hydraulicchange-over valve 2 along arrow mud 1., the drain charge mud in a chamber enters annular space by the A ' O ' of hydraulicchange-over valve through drain charge one way valve 11 simultaneously, and gets back to mud pit along arrow direction 3..Meanwhile, the piston end surface of low pressure (LP) cylinder 4 begins to contact with the step 16 of the motor-driven pilot valve gag lever post 5 of the lengthening of motor-driven pilot valve 3; In low pressure (LP) cylinder 4 moved upward process, pressurized cylinder sucked one way valve 9 and opens, and entered the d chamber of pressurized cylinder 8 from the partial pressure fluid of slush pump, its c chamber pressurized simultaneously, and pressurized cylinder is discharged one way valve 7 and is closed under the effect of spring force, pressure reduction.The mud liquid of its epicoele c is compressed, and epicoele c sprays to shaft bottom rock stratum with the super-pressure that is higher than the low pressure several times from the little hydrophthalmia 13 of drill bit because the variation of volume forces its mud by low pressure (LP) cylinder and pressurized cylinder effective pressure area ratio.When the piston of low pressure (LP) cylinder 4 continues to move upward, to promote motor-driven pilot valve gag lever post 5 moves up, as P and A wherein, O and B connect, the M end of hydraulicchange-over valve 2 enters pressure mud, then the N end begins the B by motor-driven pilot valve 3, O and drain charge one way valve 11 are connected and pressure release with annular space, at this moment the M of hydraulicchange-over valve 2 end automatic reverse under the high pressure effect, communicate with B ' by original P ' and to become P ' and communicate with A ', O ' communicates with A ' and becomes O ' and communicate with B ', enter a chamber of low pressure (LP) cylinder like this by P ' A ' from the partial pressure mud of slush pump, the b chamber is by O ', B ' is communicated with annular space and becomes low pressure, therefore low pressure (LP) cylinder 4 begins to move downward, and drive pressurized cylinder 8 moves downward simultaneously, be compressed because of pressurized cylinder 8 cavity of resorption mud liquid this moment, pressurized cylinder sucks one way valve 9 and closes under pressure reduction and spring force effect, and the pressurized cylinder in the middle of the piston is discharged one way valve 7 unlatchings, the interior c chamber of its cylinder volume will force pressurized cylinder 8 mud to spray to the rock stratum, shaft bottom with high pressure from the c chamber by the little hydrophthalmia 13 of drill bit from large to small in the process because pressurized cylinder 8 moves downward.Run into 16 ' time of gag lever post step when power cylinder piston inner face, make the supercharging device braking that moves downward, and begin to prepare for moving upward; The reciprocating motion of low pressure (LP) cylinder just will be discharged high-pressure fluid from pressurized cylinder continuously.
Referring to Fig. 2, its basic functional principle is consistent with the principle of Fig. 1, and the Fig. 2 that is not both has adopted motor-driven pilot valve Stroke Control mode of braking, i.e. low pressure (LP) cylinder drain charge loop is earlier by hydraulicchange-over valve 2, and then tapered joint circulation road by motor-driven pilot valve 3 returns zero.This mode of braking is littler than its buckles of time control mode of braking, motion is more steady.
Referring to Fig. 4, Fig. 4 is buffering control mode of braking.Mainly be to utilize piston motion to arrive near terminal point, the pressure signal that cushion chamber produces at first makes motor-driven pilot valve commutation change the position of hydraulicchange-over valve, finally controls the automatic switchover of low pressure (LP) cylinder 4, and the service behaviour of this mode is more steady.
Referring to Fig. 5, it is to change according to the principle of Fig. 1 to form.The inlet of different is pressurized cylinder is not the segment fluid flow of pressure release from the pressure medium of low-lift pump but in the low pressure (LP) cylinder course of work, and this structural principle loop power utilization rate is not subjected to environmental limit than higher.Same Fig. 2, Fig. 4 also can make Fig. 5 similar automatic conversion loop or supercharging device.
Claims (10)
1, a kind of automatic pressure unit in particular for the automatic pressure unit of downhole drill, includes up and down with the shell of connector, and it is characterized in that: it also includes:
Motor-driven pilot valve by low pressure (LP) cylinder piston control commutation, its spool afterbody has the gag lever post of lengthening, and the gag lever post of lengthening is provided with limited step,
One by motor-driven pilot valve control commutation, and then the hydraulicchange-over valve that automaticallyes switch of control low pressure (LP) cylinder,
One one end is provided with the low pressure (LP) cylinder of piston rod by above two valves combination control,
The pressurized cylinder of a single-cylinder dual-action that links to each other with piston rod,
And/or the super-pressure one way valve that mud flows backwards can prevent to transfer drilling rod between outlet that is positioned on pressurized cylinder and the little hydrophthalmia of drill bit the time,
And/or one be positioned on the low pressure check valve that shaft bottom mud in the time of preventing from down between mud sprue and the drill bit to bore seals in supercharging device,
And/or a drain charge one way valve that is arranged on motor-driven pilot valve, hydraulicchange-over valve and the path that the drilling tool annular space links to each other,
A pressurized cylinder that is located in the middle of the pressurized cylinder piston is discharged one way valve,
A pressurized cylinder that is located at the pressurized cylinder lower end sucks one way valve;
Above-mentioned piston rod is low pressure (LP) cylinder and pressurized cylinder coupling, and piston rod is linked in the motor-driven pilot valve gag lever post of low pressure (LP) cylinder, by piston rod high pressure cylinder, low pressure (LP) cylinder is moved in the same way.
2, automatic pressure unit according to claim 1 is characterized in that: this low pressure mud from slush pump is divided into three the tunnel in annular space, and wherein about 1/3rd mud is used for controlling the commutation of motor-driven pilot valve and hydraulicchange-over valve and drives the low pressure (LP) cylinder motion; About 1 liter/second flow will be pressurized to super-pressure through pressurized cylinder, spray to the rock stratum by little hydrophthalmia with super-pressure; Remaining accounts for 2/3rds mud of slush pump output continuously from the big hydrophthalmia ejection of drill bit, with assurance there is sufficient detergent power in the shaft bottom.
3, automatic pressure unit according to claim 1 is characterized in that: the pressure medium of the inlet of pressurized cylinder is the segment fluid flow of pressure release in the low pressure (LP) cylinder course of work.
4, automatic pressure unit according to claim 1 and 2 is characterized in that above-mentioned motor-driven pilot valve is the form of two-position four-way form or two-position three way, and the motor-driven pilot valve gag lever post of its spool is provided with two stroke limit steps; This valve is positioned on low pressure (LP) cylinder axis direction Your Majesty end, realizes forcing transposition by two steps on the low pressure (LP) cylinder piston end surface bump lengthening gag lever post.
5, automatic pressure unit according to claim 1 is characterized in that: hydraulicchange-over valve is the two-position four-way form of surging, and it cooperates with motor-driven pilot valve, controls the switching of sprue.
6, automatic pressure unit according to claim 1 and 2, it is characterized in that low pressure (LP) cylinder is to have only the lower end to be provided with the double acting fluid cylinder of piston rod, piston and piston rod center are provided with a hole that can hold motor-driven pilot valve core lengthening gag lever post, according to giving the stroke of determining earlier motor-driven pilot valve are controlled with spacing.
7, automatic pressure unit according to claim 1 is characterized in that: described pressurized cylinder is a single-cylinder dual-action, is connected with pressurized cylinder under it and sucks one way valve; Discharge one way valve by pressurized cylinder on the pressurized cylinder, between the chamber and be connected, realize the discharge function of its mud; Pressurized cylinder is discharged one way valve and can be positioned in the middle of piston and the piston rod, is positioned on the side of two fluid cylinders also capable of bypassly.
8, according to claim 1 or 2 or 7 described automatic pressure units, it is characterized in that: above-mentioned described various one way valves are sphere or taper, also satisfy other form of its function.
9, automatic pressure unit according to claim 1 is characterized in that: described shell shape is for holding the cylinder diameter and the big as far as possible tubulose of pressure ratio that also can make low pressure (LP) cylinder and pressurized cylinder its all parts, that have sufficient intensity.
10, automatic pressure unit according to claim 1 and 2 is characterized in that: the drain charge mud of low pressure (LP) cylinder enters annular space through hydraulicchange-over valve, drain charge one way valve; Or low pressure (LP) cylinder drain charge loop is earlier by hydraulicchange-over valve, and then tapered joint circulation road by motor-driven pilot valve returns zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93116601A CN1050403C (en) | 1993-08-26 | 1993-08-26 | Automatic pressure unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93116601A CN1050403C (en) | 1993-08-26 | 1993-08-26 | Automatic pressure unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1099456A true CN1099456A (en) | 1995-03-01 |
| CN1050403C CN1050403C (en) | 2000-03-15 |
Family
ID=4991614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93116601A Expired - Fee Related CN1050403C (en) | 1993-08-26 | 1993-08-26 | Automatic pressure unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050403C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018741A1 (en) * | 2000-09-01 | 2002-03-07 | Feng Jin | A drilling device using a jet of high pressure |
| WO2003078837A1 (en) * | 2002-03-18 | 2003-09-25 | Hongmin Li | Hydraulic automatic boosting pump |
| US9115541B2 (en) | 2012-02-08 | 2015-08-25 | China University Of Petroleum-Beijing (Cupb) | Impulse-type underground supercharged jet drilling method and device |
| CN111094759A (en) * | 2017-08-30 | 2020-05-01 | Smc 株式会社 | Supercharging device |
| CN113236156A (en) * | 2021-04-19 | 2021-08-10 | 中煤科工集团淮北***技术研究院有限公司 | Downthehole booster based on diverter valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4290496A (en) * | 1979-10-19 | 1981-09-22 | Briggs Aubrey C | Combination impact and pressure liquid rock drill |
| FR2575792A1 (en) * | 1985-01-09 | 1986-07-11 | Eimco Secoma | HYDRAULIC PRESSURE AMPLIFIER |
| NO169088C (en) * | 1989-11-08 | 1992-05-06 | Norske Stats Oljeselskap | PRESSURE AMPLIFIER FOR ASSEMBLY ABOVE THE DRILL CORNER AT THE LOWER END OF A DIP DRILL, AND THE PRESSURE AMPLIFIER GROUP INCLUDING A MULTIPLE PRINT AMPLIFIER |
-
1993
- 1993-08-26 CN CN93116601A patent/CN1050403C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018741A1 (en) * | 2000-09-01 | 2002-03-07 | Feng Jin | A drilling device using a jet of high pressure |
| WO2003078837A1 (en) * | 2002-03-18 | 2003-09-25 | Hongmin Li | Hydraulic automatic boosting pump |
| US7410012B2 (en) | 2002-03-18 | 2008-08-12 | Petrochina Company Limited | Hydraulic automatic boosting pump |
| US9115541B2 (en) | 2012-02-08 | 2015-08-25 | China University Of Petroleum-Beijing (Cupb) | Impulse-type underground supercharged jet drilling method and device |
| CN111094759A (en) * | 2017-08-30 | 2020-05-01 | Smc 株式会社 | Supercharging device |
| CN111094759B (en) * | 2017-08-30 | 2021-11-05 | Smc 株式会社 | Supercharging device |
| CN113236156A (en) * | 2021-04-19 | 2021-08-10 | 中煤科工集团淮北***技术研究院有限公司 | Downthehole booster based on diverter valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1050403C (en) | 2000-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5857519A (en) | Downhole disposal of well produced water using pressurized gas | |
| CA2510919C (en) | Plunger actuated pumping system | |
| EP1915510B1 (en) | Method and apparatus to pump liquids from well | |
| US5429036A (en) | Remote hydraulic pressure intensifier | |
| US20100116508A1 (en) | Hydraulic Pump-Drive Downhole Fluids Pump With Linear Driver | |
| CN106870317B (en) | A kind of hydraulic cylinder driven slush pump | |
| CN1407207A (en) | Shallow drill assembly with separate jet pump | |
| CN1050403C (en) | Automatic pressure unit | |
| CA1126648A (en) | Method and apparatus for flowing fluid from a plurality of interconnected wells | |
| CN2538941Y (en) | Hydraulic automatic pressurizing pump | |
| CN1021516C (en) | Hydraulic type pressure thruster for well | |
| CN113914824B (en) | Underground follow-up sealing production increasing pipe column capable of flushing well and efficient lifting method | |
| CN1118614C (en) | Sand-discharge oil production method and equipment | |
| CN202117583U (en) | Compression mechanism for drill rod of engineering driller | |
| CN214997588U (en) | Ground driving system of water-driven rodless pump | |
| CN113944451B (en) | Pneumatic rodless liquid discharge lifting pipe column and method for pneumatic production well | |
| CN216894334U (en) | Hydraulic layer-adjusting switch | |
| CN211647981U (en) | Downward drilling and expanding integrated complete equipment based on variable-diameter mechanical hole expanding and hole making | |
| CN2718198Y (en) | Drill bit short joint capable of generating water hammering pressure pulsation under well | |
| CN1139697C (en) | Extruding and extending mechanism for sectional Y-shaped extruded and extended pile | |
| CN1601048A (en) | Fixed pipe column multi-layer repeated layer-adjusting oil extraction underground pipe column and implementation process thereof | |
| GB2077366A (en) | Downhole double acting pump | |
| CN2381671Y (en) | Boring bit for vibrating and jetting bored concrete piles | |
| CN2359342Y (en) | Automatic monitoring kerve walling machine | |
| RU2021512C1 (en) | Unit for mining underwater formations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |