CN101571114A - Reciprocating drilling pump used for conveying drilling fluid with gas - Google Patents
Reciprocating drilling pump used for conveying drilling fluid with gas Download PDFInfo
- Publication number
- CN101571114A CN101571114A CNA2009100594437A CN200910059443A CN101571114A CN 101571114 A CN101571114 A CN 101571114A CN A2009100594437 A CNA2009100594437 A CN A2009100594437A CN 200910059443 A CN200910059443 A CN 200910059443A CN 101571114 A CN101571114 A CN 101571114A
- Authority
- CN
- China
- Prior art keywords
- valve assembly
- gas
- reciprocating
- drilling fluid
- pump
- 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
Abstract
The invention discloses a reciprocating drilling pump used for conveying drilling fluid with gas and belongs to the reciprocating piston pump for drilling wells, so as to reduce the clearance volume thereof and improve the pump efficiency of conveying the drilling fluid with gas. The reciprocating drilling pump comprises a one-way suction valve assembly that is arranged at one end of a valve box, a one-way discharge valve assembly that is arranged at the other end of the valve box, a piston that is arranged between the one-way suction valve assembly and the one-way discharge valve assembly, a cylinder sleeve that is arranged outside the piston, and a clearance that is arranged in the valve box among the one-way suction valve assembly, the one-way discharge valve assembly and the piston. With respect to prior reciprocating drilling pump, the one-way suction valve assembly is inverted, the lower end of the one-way discharge valve assembly is arranged at the position where the valve box opening supporting the one-way discharge valve assembly is aligned with the cylinder sleeve, the clearance therein is provided with filling blocks which are provided with inlet channels, output channels and through-cylinder channels communicating one another, the inlet channels are communicated with the one-way suction valve assembly, the outlet channels are communicated with the one-way discharge valve assembly, and the through-cylinder channels are communicated with the cylinder sleeve.
Description
Technical field
The present invention relates to a kind of reciprocating pump, relate in particular to a kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas.
Background technique
Existing drilling well is generally bigger with the cylinder inside clearance volume of reciprocating piston pump.
If carry the drilling fluid that does not contain gas, because of the medium of carrying belongs to incompressible medium basically, so the clearance volume of pump is little to the proper functioning influence of pump.But when conveying drilling fluid with gas, because of the medium of carrying has very strong compressibility, after discharge process finished, the part drilling fluid with gas still remained in the cylinder inside clearance volume and can not discharge; After next circuit suction process begins, remain in that high pressure drilling fluid with gas volume in the clearance volume expands thereupon, pressure decreases, be lower than the pressure of suction line up to in-cylinder pressure, the low pressure drilling fluid with gas just can enter in the cylinder, thereby reduced the actual liquid that sucks of each circulation significantly, pump efficiency is very low.
Therefore existing drilling well is with the operating mode variation of reciprocating piston pump (or being called reciprocating drilling pump) pump when the conveying air containing fluid, and serious problems such as show as mainly on the pump that water is poor, strenuous vibration, pump efficiency are low can't be worked under the extreme case at all.In order to make the drilling well still can proper functioning when carrying air containing fluid, just must significantly reduce the clearance volume that has drilling pump now with reciprocating piston pump.
Publication number is in the Chinese invention patent ublic specification of application of CN1654780A, disclose by fill block is set in reciprocating drilling pump and reduced clearance volume, to improve the technological scheme of reciprocating drilling pump conveying drilling fluid with gas efficient, but only disclose a fill block integral body in this specification and inserted the interior technological scheme of reciprocating drilling pump, from its accompanying drawing 3 as can be seen, the minimizing of such technological scheme clearance volume is limited, and because of in this application not the reciprocating drilling pump to reality improve, key diagram only is provided, and those skilled in the art is difficult to carry out.
Summary of the invention
The purpose of this invention is to provide a kind of improved reciprocating drilling pump,, reduce its clearance volume by a larger margin, further improve the pump efficiency of its conveying drilling fluid with gas by the improvement of structure.
Purpose of the present invention is achieved through the following technical solutions:
A kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas, comprise the unidirectional suction valve assembly that is arranged on clack box one end, be arranged on the one-way release valve assembly of the clack box the other end, be arranged on above-mentioned piston and the outer cylinder sleeve of piston between the two, and be positioned at unidirectional suction valve assembly in the clack box, clearance between one-way release valve assembly and the piston, described unidirectional suction valve assembly is inverted, the lower end of one-way release valve assembly is positioned at the clack box mouth that supports it and flushes the place with cylinder sleeve, be mounted with fill block in the clearance, this fill block is respectively arranged with the runner that enters of intercommunication, discharge runner and logical cylinder runner, entering runner communicates with unidirectional suction valve assembly, discharge runner and communicate with the one-way release valve assembly, logical cylinder runner communicates with cylinder sleeve.
Be provided with positioning block in the described clearance, the corresponding position of fill block is provided with the location indentations with this positioning block coupling.
Described unidirectional suction valve assembly is inverted and is meant, compares with existing drilling well pump structure, and its valve rod and spring are inverted, and its valve rod and valve disc constitute "T"-shaped.
Described unidirectional suction valve assembly comprises valve rod, valve disc and spring, the valve disc upside is connected with pressure cap, be provided with damping block between pressure cap and the valve disc, the valve disc downside connects valve rod, is provided with valve seat between the outer of damping block and valve disc and the clack box, and the valve rod outside is positioned at the valve disc place and is with guide sleeve, spring housing is on the valve rod in the guide sleeve outside, the valve rod outer end is connected with spring seat, and an end seat of spring is on spring seat, and the other end seat is on clack box.
Have the hole on the described spring seat.
Described valve disc and pressure cap removably connect.
Described spring seat and valve rod outer end removably connect.
The residing clack box of described unidirectional suction valve assembly stretches out at this place and is tubular, is trapped among unidirectional suction valve assembly periphery, the outer end of this tubular structure be provided with can airtight this tubular space blind plate, offer entry port on the perisporium of this tubular structure.
The residing clack box of described unidirectional suction valve assembly stretches out at this place and is tubular, be trapped among the spring and the valve rod periphery of unidirectional suction valve assembly, one end seat of spring is in the bottom of this tubular structure, the outer end of this tubular structure be provided with can airtight this tubular space blind plate, offer entry port on the perisporium of this tubular structure.
The residing clack box of described one-way release valve assembly stretches out at this place and is tubular, is trapped among the spring and the valve rod periphery of one-way release valve assembly, offers exhaust port on the perisporium of this tubular structure.
What described fill block was interior enters the runner internal diameter greater than the internal diameter of discharging runner.
The present invention adopts said structure, with respect to existing structure, the one-way release valve assembly integral is moved down, and makes its lower end be positioned at the clack box mouth that supports it and flushes the place with cylinder sleeve, to reduce clearance volume; With respect to existing structure, by the inverted structure of valve rod, spring and spring seat, thereby need in clearance volume, not provide its installing space with unidirectional suction valve assembly, fill block can be arranged to wherein, to reduce clearance volume; By the fill block position structure, guaranteed the location of fill block on clack box on the one hand, can make fill block detachable on the other hand, when changing unidirectional suction valve assembly, take out fill block, obtain enough big working space, and after having changed unidirectional suction valve assembly, fill in fill block, obtain littler clearance volume; By the design of the runner in fill block, adopt the enough big runner that enters, the flow resistance when sucking to reduce adopts as far as possible little discharge runner, at utmost to reduce clearance volume.
As seen, adopt the present invention of said structure, compared with prior art, under the prerequisite that satisfies the reciprocating drilling pump proper functioning, can reduce its clearance volume to greatest extent, further improve the pump efficiency of its conveying drilling fluid with gas.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural principle sketch of existing reciprocating drilling pump;
Fig. 2 is the structural representation of existing reciprocating drilling pump;
Fig. 3 is a reciprocating drilling pump structural principle sketch of the present invention;
Fig. 4 is a reciprocating drilling pump structural representation of the present invention;
Fig. 5 is the fill block structural representation among the present invention;
Fig. 6 is the structural representation of the unidirectional suction valve assembly among the present invention;
Number in the figure: the 1st, the spring of expulsion valve, the 2nd, the valve disc of expulsion valve, the 3rd, clearance, the 4th, suction valve supporting element, the 5th, the spring of suction valve, the 6th, the valve disc of suction valve, the 20th, the unidirectional suction valve assembly before improving, the 21st, the one-way release valve assembly before improving, the 26th, the unidirectional suction valve assembly after improving, the 27th, the one-way release valve assembly after improving, the 28th, fill block, the 29th, exhaust port, the 30th, positioning block, the 31st, nut, the 32nd, spring seat, the 33rd, the spring of unidirectional suction valve, the 34th, valve seat, the 35th, damping block, the 36th, the pressure cap of unidirectional suction valve, the 37th, bolt, the 38th, the valve disc of unidirectional suction valve, the 39th, guide sleeve, the 40th, the valve rod of unidirectional suction valve, the 41st, clack box, the 42nd, blind plate, the 43rd, entry port.
Embodiment
As Fig. 1, Fig. 2, existing reciprocating drilling pump comprises expulsion valve assembly, the suction valve assembly that is arranged on the clack box two ends, and cross setting piston that is situated between and the cylinder sleeve that is enclosed within outside the piston, cylinder sleeve communicates with clack box between expulsion valve assembly, the suction valve assembly, between expulsion valve assembly, suction valve assembly and piston, form clearance 3, be provided with suction valve assembly supporting element 4 in the clearance 3, with supported spring 5.Expulsion valve assembly, suction valve assembly all have the valve disc that is connected with valve rod one end respectively, and valve rod is set with spring outward.
As shown in Figure 1 and Figure 2, the valve disc of the expulsion valve assembly of existing reciprocating drilling pump, suction valve assembly all is inverse-T-shaped after connecting valve rod.The valve rod of suction valve assembly, spring are positioned at clearance 3.
Obviously, the existing reciprocating drilling pump of said structure has bigger clearance volume, and this mainly is for the valve rod that holds the suction valve assembly, spring and spring seat.
The existing reciprocating drilling pump of said structure will reduce its clearance volume, must carry out architecture advances.
As shown in Figure 3, Figure 4, in order to reduce clearance volume as far as possible, present embodiment is constant with the one-way release valve assembly structure, whole decline, the clack box mouth that its lower end is positioned at support it and the flush position of cylinder sleeve joint; And with unidirectional suction valve assembly inversion, promptly compare with existing homogeneous structure, it is "T"-shaped that its valve rod and valve disc are connected and composed, spring one end seat in spring seat that the valve rod outer end is connected on, the other end seat then can remove the suction valve supporting element that is positioned at clearance on clack box; Settle in the clearance fill block 28 to become possibility, this fill block can be full of clearance, and its inside is offered entering runner, discharging runner and logical cylinder runner of intercommunication respectively.Enter that distance between the valve disc of the external port of runner and unidirectional suction valve assembly satisfies unidirectional suction valve assembly proper functioning and the movement travel of valve disc when opening.As shown in Figure 3, Figure 4, because the valve disc of one-way release valve assembly is outside motion when proper functioning is opened, therefore, the external port of discharge route can flush with clack box and cylinder sleeve joint, with further minimizing clearance volume.
The concrete structure of present embodiment as shown in Figure 4, improvement back reciprocating drilling pump comprises clack box 41, is arranged on the one-way release valve assembly 27 and the unidirectional suction valve assembly 26 at clack box 41 two ends, is arranged on the cylinder sleeve that communicates with it in the clack box 41 and is sleeved on the interior piston of cylinder sleeve, and be arranged on clearance between one-way release valve assembly 27, unidirectional suction valve assembly 26 and the piston, be mounted with fill block 28 in this clearance.
Clack box wall in the clearance is provided with the recess of installing and locating piece 30, positioning block 30 can be installed within it, and fill block 28 corresponding position with it is provided with the location indentations (place, the upper right corner as shown in Figure 5) of mating with positioning block 30.Positioning block matches with location indentations, can realize the location of fill block 28 on clack box.
The structure of fill block 28 as shown in Figure 5, its diameter is that D, length are L, the internal diameter that enters runner is d3, the internal diameter of discharging runner is d1, the internal diameter of logical cylinder runner is d2.Enter runner inner diameter d 3 greater than the inner diameter d 1 of discharging runner, can reduce the flow resistance when sucking, and reduce clearance volume to greatest extent.Can also be according to basic theory and calculating such as fluid mechanics, the above-mentioned size of appropriate design, neither to influence the working condition of drilling pump behind the assurance installation fill block 28, can reduce the clearance volume of drilling pump greatly again simultaneously, carry the higher drilling fluid of air content thereby reach.
As shown in Figure 4, unidirectional suction valve assembly 26 residing clack boxes 41 stretch out and are tubular, be trapped among the spring and the valve rod periphery of unidirectional suction valve assembly, one end seat of spring is in the bottom of this tubular structure, the outer end of this tubular structure be provided with can airtight this tubular space blind plate 42, offer entry port 43 on the perisporium of this tubular structure.
One-way release valve assembly 27 residing clack boxes stretch out and are tubular, are trapped among the spring and the valve rod periphery of one-way release valve assembly, offer exhaust port 29 on the perisporium of this tubular structure.
The above-mentioned tubular structure that adopts for dismounting, maintenance suction valve assembly, expulsion valve assembly provide the space, is convenient to operate.
Inverted unidirectional suction valve assembly 26 be installed on the clack box 41 structure as shown in Figure 6, comprise valve rod 40, valve disc 38 and spring 33, valve disc 38 upsides are by bolt 37 pressure cap 36 that removably connects, be provided with damping block 35 between pressure cap 36 and the valve disc 38, valve disc 38 downsides connect valve rod 40, be provided with valve seat 34 between both outers of damping block 35 and valve disc 38 and the clack box, valve rod 40 outsides are positioned at valve disc 38 places and are with guide sleeve 39, spring 33 is enclosed within on the valve rod 40 in guide sleeve 39 outsides, valve rod 40 outer ends are connected with spring seat 32, one end seat of spring 33 is on spring seat 32, and the other end seat is on clack box.
Have the hole on the spring seat 32,, reduce the flow resistance of drilling fluid so that drilling fluid can enter by these holes when unidirectional suction valve is opened.
Present embodiment passes through the transformation to the reciprocating drilling pump of scene outfit, reduced the clearance volume of former pump greatly, make the low even medium that can not carry of original pump volumetric efficiency also can satisfy the requirement of pumping by improved pump, realized efficient conveying drilling fluid with gas, finish drillng operation, and it is simple, reliable to improve one's methods.
In the microfoam drilling well, efficiently carry the gassiness micro-foam drilling fluid, the micro-foam drilling fluid air content is brought up to 50% by 30%, the reciprocating drilling pump of above-mentioned improved still can guarantee proper functioning.
A simulation application embodiment of the present invention is as follows:
With the 3NB-1300 triplex single action pump is example, and the intrinsic clearance volume of this pump is 7.3 liters, after the above-mentioned transformation of process, its clearance volume is reduced to 3.3 liters or littler, the cylinder diameter of pump is 110mm, and the air content of drilling fluid is 54% under the standard state, still can guarantee the proper functioning of pump.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (11)
1, a kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas, comprise the unidirectional suction valve assembly that is arranged on clack box one end, be arranged on the one-way release valve assembly of the clack box the other end, be arranged on above-mentioned piston and the outer cylinder sleeve of piston between the two, and be positioned at unidirectional suction valve assembly in the clack box, clearance between one-way release valve assembly and the piston, it is characterized in that, described unidirectional suction valve assembly is inverted, the lower end of one-way release valve assembly is positioned at the clack box mouth that supports it and flushes the place with cylinder sleeve, be mounted with fill block in the clearance, this fill block is respectively arranged with the runner that enters of intercommunication, discharge runner and logical cylinder runner, entering runner communicates with unidirectional suction valve assembly, discharge runner and communicate with the one-way release valve assembly, logical cylinder runner communicates with cylinder sleeve.
2, a kind of according to claim 1 reciprocating drilling pump that is applied to conveying drilling fluid with gas is characterized in that, is provided with positioning block in the described clearance, and the corresponding position of fill block is provided with the location indentations with this positioning block coupling.
3, a kind of according to claim 1 reciprocating drilling pump that is applied to conveying drilling fluid with gas is characterized in that, described unidirectional suction valve assembly is inverted and is meant its valve rod and spring inversion, and its valve rod and valve disc constitute "T"-shaped.
4, a kind of according to claim 1 reciprocating drilling pump that is applied to conveying drilling fluid with gas, it is characterized in that, described unidirectional suction valve assembly comprises valve rod, valve disc and spring, the valve disc upside is connected with pressure cap, be provided with damping block between pressure cap and the valve disc, the valve disc downside connects valve rod, be provided with valve seat between the outer of damping block and valve disc and the clack box, the valve rod outside is positioned at the valve disc place and is with guide sleeve, spring housing is on the valve rod in the guide sleeve outside, the valve rod outer end is connected with spring seat, and an end seat of spring is on spring seat, and the other end seat is on clack box.
5, as a kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas as described in the claim 4, it is characterized in that, have the hole on the described spring seat.
6, as a kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas as described in claim 4 or 5, it is characterized in that described valve disc and pressure cap removably connect.
7, as a kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas as described in the claim 6, it is characterized in that described spring seat and valve rod outer end removably connect.
8, a kind of according to claim 1 reciprocating drilling pump that is applied to conveying drilling fluid with gas, it is characterized in that, the residing clack box of described unidirectional suction valve assembly stretches out and is tubular, be trapped among unidirectional suction valve assembly periphery, the outer end of this tubular structure be provided with can airtight this tubular space blind plate, offer entry port on the perisporium of this tubular structure.
9, as a kind of reciprocating drilling pump that is applied to conveying drilling fluid with gas as described in the claim 6, it is characterized in that, the residing clack box of described unidirectional suction valve assembly stretches out and is tubular, be trapped among the spring and the valve rod periphery of unidirectional suction valve assembly, one end seat of spring is in the bottom of this tubular structure, the outer end of this tubular structure be provided with can airtight this tubular space blind plate, offer entry port on the perisporium of this tubular structure.
10, a kind of according to claim 1 reciprocating drilling pump that is applied to conveying drilling fluid with gas, it is characterized in that, the residing clack box of described one-way release valve assembly stretches out and is tubular, is trapped among the spring and the valve rod periphery of one-way release valve assembly, offers exhaust port on the perisporium of this tubular structure.
11, a kind of according to claim 1 reciprocating drilling pump that is applied to conveying drilling fluid with gas is characterized in that, what described fill block was interior enters the runner internal diameter greater than the internal diameter of discharging runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100594437A CN101571114B (en) | 2009-05-27 | 2009-05-27 | Reciprocating drilling pump used for conveying drilling fluid with gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100594437A CN101571114B (en) | 2009-05-27 | 2009-05-27 | Reciprocating drilling pump used for conveying drilling fluid with gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571114A true CN101571114A (en) | 2009-11-04 |
| CN101571114B CN101571114B (en) | 2011-10-19 |
Family
ID=41230557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100594437A Expired - Fee Related CN101571114B (en) | 2009-05-27 | 2009-05-27 | Reciprocating drilling pump used for conveying drilling fluid with gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101571114B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817826A (en) * | 2011-09-30 | 2012-12-12 | 南通新诚电子有限公司 | Reciprocating piston pump for drilling |
| CN103348139A (en) * | 2010-12-09 | 2013-10-09 | S.P.M.流量控制股份有限公司 | Offset valve bore in a reciprocating pump |
| CN106761504A (en) * | 2017-02-21 | 2017-05-31 | 宝鸡石油机械有限责任公司 | Single spring can reset safety valve |
| US9945362B2 (en) | 2012-01-27 | 2018-04-17 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| CN117489583A (en) * | 2023-12-29 | 2024-02-02 | 宁波合力机泵股份有限公司 | Dense phase conveying CO 2 Low-clearance double-acting reciprocating pump hydraulic end of medium |
-
2009
- 2009-05-27 CN CN2009100594437A patent/CN101571114B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348139A (en) * | 2010-12-09 | 2013-10-09 | S.P.M.流量控制股份有限公司 | Offset valve bore in a reciprocating pump |
| US9784262B2 (en) | 2010-12-09 | 2017-10-10 | S.P.M. Flow Control, Inc. | Offset valve bore in a reciprocating pump |
| CN102817826A (en) * | 2011-09-30 | 2012-12-12 | 南通新诚电子有限公司 | Reciprocating piston pump for drilling |
| US9945362B2 (en) | 2012-01-27 | 2018-04-17 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| US10330097B2 (en) | 2012-01-27 | 2019-06-25 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| US11401930B2 (en) | 2012-01-27 | 2022-08-02 | Spm Oil & Gas Inc. | Method of manufacturing a fluid end block with integrated web portion |
| CN106761504A (en) * | 2017-02-21 | 2017-05-31 | 宝鸡石油机械有限责任公司 | Single spring can reset safety valve |
| CN106761504B (en) * | 2017-02-21 | 2019-01-22 | 宝鸡石油机械有限责任公司 | Single spring can reset safety valve |
| CN117489583A (en) * | 2023-12-29 | 2024-02-02 | 宁波合力机泵股份有限公司 | Dense phase conveying CO 2 Low-clearance double-acting reciprocating pump hydraulic end of medium |
| CN117489583B (en) * | 2023-12-29 | 2024-04-19 | 宁波合力机泵股份有限公司 | Dense phase conveying CO2Low-clearance double-acting reciprocating pump hydraulic end of medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101571114B (en) | 2011-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101571114B (en) | Reciprocating drilling pump used for conveying drilling fluid with gas | |
| CN201225262Y (en) | Hydraulic power oil well pump | |
| CN207813877U (en) | A kind of anti-airlock oil pump, gas-liquid separator and extracting device of oil | |
| CN1318722C (en) | Hydraulic drill string accumulator | |
| CN208106383U (en) | Producing well energy-saving air release valve | |
| CN201963271U (en) | Integral liquid discharge device for suctioning and discharging bubbles in gas well | |
| CN202203092U (en) | Solid plunger type oil-well pump | |
| CN202017604U (en) | High-efficiency oil well pump | |
| CN212406690U (en) | High-gas-content well sucker-rod pump lifting effect-improving device and process pipe column | |
| CN201059262Y (en) | Exhausting synergy injection-production oil-well pump | |
| CN202300993U (en) | Reciprocating piston pump for well drilling | |
| CN210919407U (en) | Circulation gas-proof oil-well pump | |
| CN2775342Y (en) | Separate production and separate output oil pump | |
| CN202914046U (en) | Plug-in type screw pump system | |
| CN204532798U (en) | A kind of oil-well pump oil inlet valve | |
| CN201705632U (en) | Rodless hydraulic deep oil well pump | |
| CN201486954U (en) | Air (oil) pressure cylinder improvement device | |
| CN201794742U (en) | Multifunctional gas cooler | |
| JP2008196476A (en) | Compact type air pump | |
| CN204098892U (en) | A kind of down-hole gas-liquid separator tube post | |
| CN104033366A (en) | Anti-airlock oil well pump | |
| CN204532729U (en) | A kind of continuous water supply pumped well | |
| CN101008381A (en) | Pumping system of rodless piston pump | |
| CN212154657U (en) | Telescopic drill bit | |
| CN102817826A (en) | Reciprocating piston pump for drilling |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20140527 |