CN201843574U - Self-locking type well cementing rubber stopper combined device - Google Patents
Self-locking type well cementing rubber stopper combined device Download PDFInfo
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- CN201843574U CN201843574U CN 201020604499 CN201020604499U CN201843574U CN 201843574 U CN201843574 U CN 201843574U CN 201020604499 CN201020604499 CN 201020604499 CN 201020604499 U CN201020604499 U CN 201020604499U CN 201843574 U CN201843574 U CN 201843574U
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Abstract
The utility model relates to the technical field of oil and gas well cementation and well completion and discloses a self-locking type well cementing rubber stopper combined device. The device comprises an upper rubber stopper core, a lower rubber stopper core, a rubber stopper body, a float collar body, a rubber stopper seat, a float collar core seat and a one-way valve, wherein the upper rubber stopper core is fixed with the lower rubber core; the rubber stopper body is fixed on the upper stopper core; a back stop groove is arranged outside the lower rubber stopper core; the float collar seat comprises an upper connection sleeve and a lower connection sleeve, wherein the lower end of the upper connection sleeve is fixed at the middle part of the upper end of the lower connection sleeve; the lower part of the lower connection sleeve is of a cone shape with wide upper part and narrow lower part; and the external side at the lower part of the lower connection sleeve is fixed with the internal side at the lower part of the float collar body. The device has the reasonable and compact structure and is convenient to use; a self-lock device is matched with the lower rubber stopper core, and the self-locking can be realized when the bump pressure of the slurry replacement is finished; therefore, the cement slurry is prevented from backflow caused by the sealing failure of the float collar. Therefore, the device has good using and low cost, and the potential safety hazard is reduced.
Description
Technical field
The utility model relates to the solid completion technique field of petroleum and natural gas well, is a kind of self-locking cementing plug composite set.
Background technology
The reinforcing oil well operation is often because some uncontrollable factors can cause the situation of remaining too much cement plug in well cementation finishes rear sleeve, in a single day cement plug accident, the serious consequence that will cause oil well normally to go into operation particularly take place during the well cementing operation of oil reservoir completion to stay in the sleeve pipe more.Address the above problem, the drilling tool of generally taking to be lowered to smaller szie bores and removes the cement plug that stays more, this mode is not only incured loss through delay the operation early of oil gas well, but also to spend drilling out workover costs tens thousand of even more than ten ten thousand yuan, if take place float collar lost efficacy, for preventing the cement paste refluence Hou Ning that must build the pressure, and the Hou Ninghui that builds the pressure causes and occurs microannulus between sleeve pipe and the cement sheath, thereby influences cementing quality, also can gang up the hidden danger that stays passage for oil gas water.At present both at home and abroad the completion cementing plug that generally uses of oil field is flat plug, also has the cementing plug of a small amount of self-locking to be used, but because result of use is not good or because of complex structure, the high large-scale promotion application of failing of price.
Summary of the invention
The utility model provides a kind of self-locking cementing plug composite set, has overcome the deficiency of above-mentioned prior art, and it can effectively solve existing completion cementing plug and have result of use difference and problem of ultra-high price.
The technical solution of the utility model realizes by following measure: a kind of self-locking cementing plug composite set comprises top cement plug core, bottom plug core, rubber plug body, float collar body, plug seat, float collar core print seat and one way valve; Top cement plug core and bottom plug core are fixed together, on the top cement plug core, be fixed with rubber plug body, in the outside of bottom plug core the retaining groove is arranged, comprise upper joint sleeve and lower joint sleeve at the float collar core print seat, the lower end of upper joint sleeve is fixed on the upper center of lower joint sleeve, the bottom of lower joint sleeve is taper wide at the top and narrow at the bottom, the outside, bottom of lower joint sleeve is fixedly installed togather with the lower inside of float collar body, the upper end of one way valve withstands on the lower inside surface of lower joint sleeve and keeps sealing, the lower inside of the outside of upper joint sleeve and plug seat is fixedly installed togather, the upper outside seat of the bottom plug core of retaining groove top is on the upper end of plug seat, inner convex platform is arranged at the top at the plug seat, form self-locking grooves between inner convex platform and the upper joint sleeve, be installed with self-locking device in self-locking grooves, the bottom of self-locking device is positioned at the retaining groove and the bottom plug core can not be moved up.
Be further optimization and/or improvements below to above-mentioned utility model technical scheme:
Above-mentioned self-locking device can comprise pawl type lock ring and stop collar, pawl type lock ring comprises installation head and finger-like elastic claw, the upper end of the lower end of installation head and finger-like elastic claw is fixed together, stop collar is installed in the installation head that also will be positioned at the stop collar top in the self-locking grooves and holds out against in self-locking grooves, finger-like elastic claw external diameter from top to bottom becomes big gradually, the lower outer diameter of finger-like elastic claw is greater than the degree of depth of self-locking grooves, and the bottom of finger-like elastic claw is positioned at the retaining groove and the bottom plug core can not be moved up.
Between the bottom plug core of above-mentioned retaining groove top and the plug seat sealing ring can be installed.
Mounting groove can be arranged at the bottom of above-mentioned top cement plug core, the top of bottom plug core is fixed with the erection column of external diameter less than the bottom plug core, erection column is fixedly mounted in the mounting groove by screw thread, the outside, upper end of bottom plug core is taper wide at the top and narrow at the bottom, the inboard, upper end of plug seat is taper wide at the top and narrow at the bottom, and the outside, the upper end seat of bottom plug core is on the inboard, upper end of plug seat.
Can there be at least 3 length that circumferentially distribute to stitch thoroughly on the above-mentioned finger-like elastic claw.
The retaining depth of groove of above-mentioned bottom plug core can be less than the wall thickness of finger-like elastic claw bottom.
Between above-mentioned lower joint sleeve and the float collar body sealing ring can be installed.
Above-mentioned one way valve can comprise semicircle valve ball, valve rod, compression spring and holder; The outside of holder is fixedly mounted in the lower end of float collar body by screw thread, there is installing hole at middle part at holder, on the holder in the installing hole outside, flange is arranged, the upper end of valve rod is fixed with the semicircle valve ball, the lower end of valve rod is positioned at installing hole, be equipped with in the valve rod outside and can make the semicircle valve ball withstand on compression spring on the lower inside surface of lower joint sleeve, the upper end of compression spring is fixed on the bottom surface of semicircle valve ball, the lower end of compression spring is sleeved on the holder of flange outer sides, on the mount pad in the compression spring outside cement paste discharge orifice is arranged.
The utility model reasonable and compact in structure, easy to use, by the cooperating of self-locking device and bottom plug core, when finishing bruising, form self-locking, prevent to flow backwards because of the float collar seal failure causes cement paste for slurry.So result of use is good, the low potential safety hazard that also reduced of cost.
Description of drawings
Accompanying drawing 2 is looked the structure for amplifying schematic diagram for the master that top cement plug core, bottom plug core in the utility model most preferred embodiment are connected with rubber plug body.
Accompanying drawing 3 is looked the structure for amplifying schematic diagram for the master that float collar body, plug seat, float collar core print seat in the utility model most preferred embodiment are connected with one way valve.
Coding in the accompanying drawing is respectively: 1 is the top cement plug core, and 2 is the bottom plug core, and 3 is rubber plug body, and 4 is the float collar body, 5 is the plug seat, and 6 is the semicircle valve ball, and 7 is the retaining groove, and 8 is upper joint sleeve, 9 is lower joint sleeve, and 10 is inner convex platform, and 11 is self-locking grooves, and 12 is stop collar, 13 is installation head, and 14 is the finger-like elastic claw, and 15 is sealing ring, and 16 is mounting groove, 17 is erection column, and 18 is valve rod, and 19 are the compression spring, and 20 is holder, 21 is flange, and 22 is the cement paste discharge orifice, and 23 are long saturating seam, and 24 is beveled cone.
The specific embodiment
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
Shown in accompanying drawing 1 to 3, this self-locking cementing plug composite set comprises top cement plug core 1, bottom plug core 2, rubber plug body 3, float collar body 4, plug seat 5, float collar core print seat and one way valve; Top cement plug core 1 and bottom plug core 2 are fixed together, on top cement plug core 1, be fixed with rubber plug body 3, in the outside of bottom plug core 2 retaining groove 7 is arranged, the float collar core print seat comprises upper joint sleeve 8 and lower joint sleeve 9, the lower end of upper joint sleeve 8 is fixed on the upper center of lower joint sleeve 9, the bottom of lower joint sleeve 9 is taper wide at the top and narrow at the bottom, the outside, bottom of lower joint sleeve 9 is fixedly installed togather with the lower inside of float collar body 4, the upper end of one way valve withstands on the lower inside surface of lower joint sleeve 9 and keeps sealing, the lower inside of the outside of upper joint sleeve 8 and plug seat 5 is fixedly installed togather, the upper outside seat of the bottom plug core 2 of retaining groove 7 tops is on the upper end of plug seat 5, on the top of plug seat 5 inner convex platform 10 is arranged, inner convex platform 10, form self-locking grooves 11 between plug seat 5 and the upper joint sleeve 8, be installed with self-locking device in self-locking grooves 11, the bottom of self-locking device is positioned at retaining groove 7 and bottom plug core 2 can not be moved up.
Can according to actual needs above-mentioned self-locking cementing plug composite set be made further optimization and/or improvements:
Shown in accompanying drawing 1,3, self-locking device comprises pawl type lock ring and stop collar 12, pawl type lock ring comprises installation head 13 and finger-like elastic claw 14, the upper end of the lower end of installation head 13 and finger-like elastic claw 14 is fixed together, stop collar 12 is installed in the installation head 13 that also will be positioned at stop collar 12 tops in the self-locking grooves 11 and holds out against in self-locking grooves 11, finger-like elastic claw 14 external diameter from top to bottom becomes big gradually, the lower outer diameter of finger-like elastic claw 14 is greater than the degree of depth of self-locking grooves 11, and the bottom of finger-like elastic claw 14 is positioned at retaining groove 7 and bottom plug core 2 can not be moved up.
Shown in accompanying drawing 1,2, between the bottom plug core 2 of retaining groove 7 tops and the plug seat 5 sealing ring 15 is installed.
As shown in Figure 2, mounting groove 16 is arranged at the bottom of top cement plug core 1, the top of bottom plug core 2 is fixed with the erection column 17 of external diameter less than bottom plug core 2, erection column 17 is fixedly mounted in the mounting groove 16 by screw thread, the outside, upper end of bottom plug core 2 is taper wide at the top and narrow at the bottom, the inboard, upper end of plug seat 5 is taper wide at the top and narrow at the bottom, the outside, the upper end seat of bottom plug core 2 is on the inboard, upper end of plug seat 5, in actual applications, can have and the identical beveled cone 24 of bottom plug core 2 upper ends outside taper in the outside of rubber plug body 3, the conical surface in the conical surface of the beveled cone 24 of its foot and the outside, the upper end of bottom plug core 2 is positioned on the same conical surface, like this, when on the inboard, upper end of seat, the outside, the upper end of bottom plug core 2 and when forming bruising at plug seat 5, the bottom of the beveled cone 24 of rubber plug body 3 foots also seat on the inboard, upper end of plug seat 5 and play sealing function.
Shown in accompanying drawing 1,3, at least 3 saturating seams 23 of the length that circumferentially distributes are arranged on the finger-like elastic claw 14.
As shown in Figure 3, retaining groove 7 degree of depth of bottom plug core 2 are less than the wall thickness of finger-like elastic claw 14 bottoms.
As shown in Figure 3, in order to increase sealing, between lower joint sleeve 9 and the float collar body 4 sealing ring 15 is installed.
Shown in accompanying drawing 1,3, one way valve comprises semicircle valve ball 6, valve rod 18, compression spring 19 and holder 20; The outside of holder 20 is fixedly mounted in the lower end of float collar body 4 by screw thread, there is installing hole at middle part at holder 20, on the holder 20 in the installing hole outside, flange 21 is arranged, the upper end of valve rod 18 is fixed with semicircle valve ball 6, the lower end of valve rod 18 is positioned at installing hole, be equipped with in valve rod 18 outsides and can make semicircle valve ball 6 withstand on compression spring 19 on the lower inside surface of lower joint sleeve 9, the upper end of compression spring 19 is fixed on the bottom surface of semicircle valve ball 6, the lower end of compression spring 19 is sleeved on the mount pad 20 in flange 21 outsides, on the holder in compression spring 19 outsides cement paste discharge orifice 22 is arranged.
Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
The use of the utility model most preferred embodiment: the position that at first connector of float collar body 4, plug seat 5, float collar core print seat and one way valve is connected the casing string reserved water bod, and with casing string one G.I.H at first, the connector of top cement plug core 1, bottom plug core 2 and rubber plug body 3 is dropped in the intact back of infusion when annotating well cementation liquid, replaces well cementation liquid until arriving float collar place's bruising; During bruising, the bottom plug core of rubber plug body 3 bottoms is advanced into plug seat 52 times, strut under 14 continuation of finger-like elastic claw and be advanced in the upper joint sleeve 8, this moment, the outside, the upper end seat owing to bottom plug core 2 formed bruising on the inboard, upper end of plug seat 5, and retaining groove 7 places that pressure forces finger-like elastic claw 14 to flick and enters bottom plug core 2 form self-locking state.At this moment, if after the termination of pumping there be when refluence trend takes place float collar inefficacy cement paste, the finger-like elastic claw 14 of pawl type lock ring will stop bottom plug core 2 come-ups, and bottom plug core 2 forms new effective packing, the backflow of prevention cement paste with sealing ring 15 between the plug seat 5 simultaneously.
Claims (10)
1. a self-locking cementing plug composite set is characterized in that comprising top cement plug core, bottom plug core, rubber plug body, float collar body, plug seat, float collar core print seat and one way valve; Top cement plug core and bottom plug core are fixed together, on the top cement plug core, be fixed with rubber plug body, in the outside of bottom plug core the retaining groove is arranged, comprise upper joint sleeve and lower joint sleeve at the float collar core print seat, the lower end of upper joint sleeve is fixed on the upper center of lower joint sleeve, the bottom of lower joint sleeve is taper wide at the top and narrow at the bottom, the outside, bottom of lower joint sleeve is fixedly installed togather with the lower inside of float collar body, the upper end of one way valve withstands on the lower inside surface of lower joint sleeve and keeps sealing, the lower inside of the outside of upper joint sleeve and plug seat is fixedly installed togather, the upper outside seat of the bottom plug core of retaining groove top is on the upper end of plug seat, inner convex platform is arranged at the top at the plug seat, inner convex platform, form self-locking grooves between plug seat and the upper joint sleeve, be installed with self-locking device in self-locking grooves, the bottom of self-locking device is positioned at the retaining groove and the bottom plug core can not be moved up.
2. self-locking cementing plug composite set according to claim 1, it is characterized in that self-locking device comprises pawl type lock ring and stop collar, pawl type lock ring comprises installation head and finger-like elastic claw, the upper end of the lower end of installation head and finger-like elastic claw is fixed together, stop collar is installed in the installation head that also will be positioned at the stop collar top in the self-locking grooves and holds out against in self-locking grooves, finger-like elastic claw external diameter from top to bottom becomes big gradually, the lower outer diameter of finger-like elastic claw is greater than the degree of depth of self-locking grooves, and the bottom of finger-like elastic claw is positioned at the retaining groove and the bottom plug core can not be moved up.
3. self-locking cementing plug composite set according to claim 1 and 2 is characterized in that between the bottom plug core of retaining groove top and the plug seat sealing ring being installed.
4. self-locking cementing plug composite set according to claim 3, mounting groove is arranged at the bottom that it is characterized in that the top cement plug core, the top of bottom plug core is fixed with the erection column of external diameter less than the bottom plug core, erection column is fixedly mounted in the mounting groove by screw thread, the outside, upper end of bottom plug core is taper wide at the top and narrow at the bottom, the inboard, upper end of plug seat is taper wide at the top and narrow at the bottom, and the outside, the upper end seat of bottom plug core is on the inboard, upper end of plug seat.
5. self-locking cementing plug composite set according to claim 3 is characterized in that having on the finger-like elastic claw at least 3 length that circumferentially distribute to stitch thoroughly.
6. self-locking cementing plug composite set according to claim 4 is characterized in that having on the finger-like elastic claw at least 3 length that circumferentially distribute to stitch thoroughly.
7. self-locking cementing plug composite set according to claim 2 is characterized in that the wall thickness of the retaining depth of groove of bottom plug core less than finger-like elastic claw bottom.
8. self-locking cementing plug composite set according to claim 6 is characterized in that the wall thickness of the retaining depth of groove of bottom plug core less than finger-like elastic claw bottom.
9. self-locking cementing plug composite set according to claim 8 is characterized in that between lower joint sleeve and the float collar body sealing ring being installed.
10. self-locking cementing plug composite set according to claim 9 is characterized in that one way valve comprises semicircle valve ball, valve rod, compression spring and holder; The outside of holder is fixedly mounted in the lower end of float collar body by screw thread, there is installing hole at middle part at holder, on the holder in the installing hole outside, flange is arranged, the upper end of valve rod is fixed with the semicircle valve ball, the lower end of valve rod is positioned at installing hole, be equipped with in the valve rod outside and can make the semicircle valve ball withstand on compression spring on the lower inside surface of lower joint sleeve, the upper end of compression spring is fixed on the bottom surface of semicircle valve ball, the lower end of compression spring is sleeved on the holder of flange outer sides, on the mount pad in the compression spring outside cement paste discharge orifice is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020604499 CN201843574U (en) | 2010-11-13 | 2010-11-13 | Self-locking type well cementing rubber stopper combined device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020604499 CN201843574U (en) | 2010-11-13 | 2010-11-13 | Self-locking type well cementing rubber stopper combined device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201843574U true CN201843574U (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020604499 Expired - Lifetime CN201843574U (en) | 2010-11-13 | 2010-11-13 | Self-locking type well cementing rubber stopper combined device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201843574U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979821A (en) * | 2010-11-13 | 2011-02-23 | 中国石油集团西部钻探工程有限公司 | Self-locking cementing stopper combination device |
| CN103556970A (en) * | 2013-11-08 | 2014-02-05 | 西安航威石化设备有限公司 | Combined self-lock rubber plug |
| CN106639911A (en) * | 2016-12-26 | 2017-05-10 | 中国石油天然气股份有限公司 | Reducing floating coupling |
-
2010
- 2010-11-13 CN CN 201020604499 patent/CN201843574U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979821A (en) * | 2010-11-13 | 2011-02-23 | 中国石油集团西部钻探工程有限公司 | Self-locking cementing stopper combination device |
| CN103556970A (en) * | 2013-11-08 | 2014-02-05 | 西安航威石化设备有限公司 | Combined self-lock rubber plug |
| CN106639911A (en) * | 2016-12-26 | 2017-05-10 | 中国石油天然气股份有限公司 | Reducing floating coupling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110525 Effective date of abandoning: 20131113 |
|
| RGAV | Abandon patent right to avoid regrant |