CN1107553A - Sealing-locking device for rod-type pumping unit - Google Patents
Sealing-locking device for rod-type pumping unit Download PDFInfo
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- CN1107553A CN1107553A CN 94100769 CN94100769A CN1107553A CN 1107553 A CN1107553 A CN 1107553A CN 94100769 CN94100769 CN 94100769 CN 94100769 A CN94100769 A CN 94100769A CN 1107553 A CN1107553 A CN 1107553A
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- pumping unit
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Abstract
The improved sealing-locking device for rod-type oil-pumping unit features that its external body is composed of top joint, external tube of sealed cylinder sleeve and bottom joint, all of which are connected by threaded connection, and its internal body is composed of hollow plunger with elastic claws, elastic lock sleeve and spring. its advantages include reliable sealing and locking, controllable connection and release force and long service period.
Description
The present invention is mainly used in the petroleum industry field, is a kind of improved oil well pump sealing-locking device, is primarily aimed at the rod-type pumping unit lower end and seals locking.
At present, rod-type pumping unit commonly used all is to take upper end sealing locking, and the male cone (strobilus masculinus) annular valve with constant slope has also been installed in the upper end of working barrel in rod-type pumping unit.The shortcoming that this sealing-locking device exists is an one, the elastic force of the spring sheet in the middle of this determines to become a definite value according to its physical dimension, can not change with people's wish, if this elastic force is less, when not overcoming semi-dry friction power between interior working barrel and the plunger and inertial force, working barrel in the clamping force of spring sheet then blocks incessantly will working barrel be also up with rod string is up, cause sealing locking position severe leakage, influence is produced.If elastic force is excessive, interior working barrel is during by spring sheet, is stuck sometimes and down less than at the bottom of the pump, causes not fuel-displaced; It two is that seal section is too little, and oil well pump motion when work is jiggly, interior working barrel constantly effect down, it is tired that spring sheet is occurred, elastic force diminishes and also can cause the leakage of sealing position, influence is produced.
The purpose of this invention is to provide a kind of rod-type pumping unit lower end sealing-locking device, this not only seals reliably, and locking firmly, and meeting Tuo Li can be by people's wish control.
The object of the present invention is achieved like this, upper connection, and the sealing cylinder sleeve, scyewed joint is used in outer tube and lower contact respectively, forms the ectosome of sealing-locking device for rod-type pumping unit.By hollow plunger scyewed joint elastic card claw, the no threaded end that is docked to hollow stem packs into elastic lock sleeve and spring successively from the threaded end of hollow stem again, screw on nut, the endosome of forming sealing-locking device for rod-type pumping unit, screw thread with hollow stem one end is tightened onto in the screwed hole of centre of lower contact again, and such assembling once the complete sealing-locking device for rod-type pumping unit of cover finishes.When using this device, the elastic card claw that needs earlier hollow plunger is linked is not thrown off with hollow stem as a part, and the standing valve lower end of directly receiving rod-type pumping unit with the other end screw thread of hollow plunger is with the sucker rod G.I.H.Other parts of sealing-locking device for rod-type pumping unit are connected with corresponding oil pipe by the tubing round thread of one end of the upper connection on the ectosome, and with oil pipe earlier down in the well predetermined pump deep-seated put, and then with hollow plunger, the part that elastic card claw connects with working barrel in the rod-type pumping unit, put by the predetermined pump deep-seated that the sucker rod band from the subsurface to the sealing-locking device for rod-type pumping unit, elastic card claw is by the upper connection of this device, the sealing cylinder sleeve, its endoporus entangles hollow stem the downward slippage of the most advanced and sophisticated body of rod, when continuing to go downwards to hollow stem flange top shoulder, elastic card claw is just under the rod string mass action, produce radial dilatation, after expansion finishes, elastic card claw forces the downward pressure spring of elastic lock sleeve, continue downward slippage, when going downwards to the qualification position, the elastic force that elastic card claw produces when not leaning on radial dilatation is shrunk to original state, at this moment, elastic lock sleeve is under the promotion of spring force, entangle elastic card claw rapidly, make elastic card claw, hollow stem and elastic lock sleeve butt joint are one, have realized the firm locking that interior working barrel of rod-type pumping unit and sealing locking are put; Simultaneously, hollow plunger also just slippage play reliable seal action to the centre of sealing cylinder sleeve, prevented that the interior leak of liquid of the above oil pipe of rod-type pumping unit is in pit shaft.But rod-type pumping unit is when proper functioning, and liquid is that standing valve that central through bore by sealing-locking device backs down pump enters into pump barrel and goes in the well.When the needs pump detection and workover, to carry on the sucker rod, when upper lifting force reaches enough big, elastic card claw is along moving on the inclined-plane flange of hollow stem, and the generation radial dilatation, force elastic lock sleeve also to produce radial dilatation simultaneously, carry in the continuation, after the restraining force of elastic lock sleeve was disengaged, elastic card claw just was divided into two-part with hollow stem.Elastic card claw, hollow plunger proposes ground with working barrel in the rod-type pumping unit and sucker rod, and remaining part is still continued to employ in well, can reuse.At this moment be that interchangeable pump connects hollow plunger and elastic card claw G.I.H again again, dock, finish the pump detection and workover process.This device is repeatedly reusable, and structure is very simple, and sealing is reliable, and locking firmly connects that to take off the power excursion big, easy construction, and the life-span is long, and has saved the outer working tube of original rod-type pumping unit, and expense reduces cost.
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is vertical sectional structure chart of the present invention.
Among the figure: 1, upper connection; 2, sealing cylinder sleeve; 3, hollow plunger; 4, outer tube; 5, elastic card claw; 6, hollow stem; 7, elastic lock sleeve; 8, spring; 9, back tightening nut; 10, lower contact.
In Fig. 1, upper connection (1), sealing cylinder sleeve (2), outer tube (4) link up with respective threads respectively with lower contact (10), have formed the ectosome of sealing-locking device.One end of upper connection (1) is a tubing round thread, is used for connecting oil pipe.One end is a metric thread, is used for connecting sealing cylinder sleeve (2), and the endoporus of sealing cylinder sleeve (2) needs very high machining accuracy and surface finishment, after must carrying out chromium plating and handling again correct grinding just can reach requirement.Outer tube (4) plays the effect that connects sealing cylinder sleeve (2) and lower contact (10), leave enough spaces to lock portion, the center of lower contact (10) has processed one 12 to 35 millimeters axial hole, for rod-type pumping unit provides liquid chunnel, the oil pipe male thread is processed in its lower end, gives over to the usefulness that connects tail pipe under the pump.By hollow plunger (3) lower end scyewed joint elastic card claw (5), be docked to the no threaded end of hollow stem (6) again, pack into elastic lock sleeve (7), spring (8) successively, screw on back tightening nut (9) from hollow stem (6) threaded end, formed the endosome of sealing-locking device.Again hollow stem (6) threaded one end is tightened onto in the screwed hole of centre of lower contact (10).So complete sealing-locking device for rod-type pumping unit just assembling is finished.Structure shown in the figure is that this device is in normal working.
The outer surface of hollow plunger (3) requires the machining accuracy height, with the surface finishment height, also must carry out chromium plating and finish grind again, form the face that well is sealed and matched firmly, its face length that is sealed and matched with sealing cylinder sleeve (2), can be controlled within the 1.5m, temperature distortion is little, and anticorrosive wear resistance is good, and the intensity long-life is long, than rubber, superior many of sealing configurations such as teflon.The center of hollow plunger (3) also is processed as 12～35 millimeters axial hole, is liquid chunnel.Elastic card claw (5) is to be processed by a kind of Special spring steel, has good elasticity and very high intensity after special processing.One end of its claw has 3～12 elasticity claws, and the effect of claw is the depression shoulder that is used for catching hollow stem (6).Its center has the axial hole of an elastic card claw (5) equally, passes through for fluid.The central through bore of hollow stem (6) also is a liquid chunnel, and its outer surface one end is processed into the cone angle of 30 °～150 ° of degree, and the other end is processed into screw thread, is used for connecting lower contact (10).Its hollow rod body intermediate portion has been processed 2 to 6 inclined-plane shoulders.Elastic lock sleeve (7) and the used material of elastic card claw (5), heat treatment method is identical, its structure one end is concentrically ringed solid steel body, the other end is processed into 3～12 flat spring sheets, its effect is to (5) restraining forces of elastic card claw, this outer restraining force is the key of sealing-locking device for rod-type pumping unit, and its size directly has influence on the success or failure of this device.Therefore, elastic lock sleeve (7) is a vitals, and it will cooperatively interact with elastic card claw (5), makes to connect to take off the just right of power control.Concerning rod-type pumping unit, sealing-locking device wants littler to relay, easily butt joint, success rate height when going into the well.It is big that tearaway load is wanted, and is unlikely pump in proper functioning, and the frictional force during owing to up stroke and the effect of inertial force cause the failure of pump, and therefore, the present invention designs successful according to the on-the-spot practical application characteristics of rod-type pumping unit just.This is that rod-type pumping unit sealed lock portion can't be obtained originally.Succeeding in developing of this device will increase unlimited vigor applying of each oil field for rod-type pumping unit.
Claims (6)
1, sealing-locking device for rod-type pumping unit, its feature it by upper connection (1), the sealing cylinder sleeve (2), outer tube (4) and lower contact (10) are the ectosome of this device with scyewed joint respectively, dock hollow stem (6) by hollow plunger (3) then with lower end scyewed joint elastic card claw (5), pack into elastic lock sleeve (7) successively by hollow stem (6) threaded end again, spring (8), screw on nut (9), constitute the endosome of this device, and then the spin screwed hole of centre of lower contact (10) of hollow stem (6) threaded one end.
2, by the described device of claim 1, it is characterized in that the center of lower contact (10) processes the axial hole of 12 to 35 millimeters of diameters, the oil pipe male thread is processed in the lower end of lower contact (10).
3,, it is characterized in that the axial hole diameter of the middle part processing of hollow plunger (3) is 12 to 35 millimeters by the described device of claim 1.
4, by the described device of claim 1, it is characterized in that an end of claw (5) has 3 to 12 elasticity claws to constitute, the optimum length of its claw is 55 to 220 millimeters, the diameter that an axial hole also is processed at the center of claw (5) is 12 to 35 millimeters.
5, by the described device of claim 1, it is characterized in that outer surface one end of hollow stem (6) is processed into the cone angle of 30 degree to 150 degree, the other end is processed into the lower contact that is threaded (10), and hollow stem (6) intermediate portion is processed into the inclined-plane shoulder.
6, by the described device of claim 1, it is characterized in that elastic lock sleeve (9) one ends are processed into 3 to 12 flat spring sheets, match with elastic card claw (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94100769 CN1054183C (en) | 1994-02-22 | 1994-02-22 | Sealing-locking device for rod-type pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94100769 CN1054183C (en) | 1994-02-22 | 1994-02-22 | Sealing-locking device for rod-type pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1107553A true CN1107553A (en) | 1995-08-30 |
| CN1054183C CN1054183C (en) | 2000-07-05 |
Family
ID=5029827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94100769 Expired - Fee Related CN1054183C (en) | 1994-02-22 | 1994-02-22 | Sealing-locking device for rod-type pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1054183C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161431A (en) * | 2011-12-19 | 2013-06-19 | 中国石油化工股份有限公司 | Small hole well completion lifting technology tubular column and use method thereof |
| CN107120102A (en) * | 2017-05-26 | 2017-09-01 | 天津昱利赢石油科技有限公司 | Long stroke acid fracturing linkage discharge opeing oil well pump |
| CN112081732A (en) * | 2019-06-13 | 2020-12-15 | 中国石油化工股份有限公司 | Under-pump weighted connector, oil well pump and oil extraction method |
-
1994
- 1994-02-22 CN CN 94100769 patent/CN1054183C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161431A (en) * | 2011-12-19 | 2013-06-19 | 中国石油化工股份有限公司 | Small hole well completion lifting technology tubular column and use method thereof |
| CN107120102A (en) * | 2017-05-26 | 2017-09-01 | 天津昱利赢石油科技有限公司 | Long stroke acid fracturing linkage discharge opeing oil well pump |
| CN112081732A (en) * | 2019-06-13 | 2020-12-15 | 中国石油化工股份有限公司 | Under-pump weighted connector, oil well pump and oil extraction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1054183C (en) | 2000-07-05 |
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