CN2182876Y - Conjunction head for two stage cementing - Google Patents
Conjunction head for two stage cementing Download PDFInfo
- Publication number
- CN2182876Y CN2182876Y CN 94208121 CN94208121U CN2182876Y CN 2182876 Y CN2182876 Y CN 2182876Y CN 94208121 CN94208121 CN 94208121 CN 94208121 U CN94208121 U CN 94208121U CN 2182876 Y CN2182876 Y CN 2182876Y
- Authority
- CN
- China
- Prior art keywords
- body shell
- borehole jack
- stage cementing
- hole
- utility
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a conjunction head for two stage cementing for the cementing of an oil well, which comprises four parts of a body casing (1), a closing hole rubber plug (9), a tapper (10) and a bottom plug (11). The utility model is characterized in that a closing hole sleeve (5) and an opening hole sleeve (6) are both arranged in the body casing (1) to form a two-layer structure; the outer diameter of the closing hole sleeve (5) is provided with four seal rings (12) which can form double tracks of seals at the both sides of a circulation port, and the opening hole sleeve (6) is provided with a pressure relief hole (14). The utility model has the advantages of high intensity, good sealability, reliable performance, etc. The utility model can ensure the success of two stage cementing work.
Description
The utility model relates to a kind of oil well cementing underground work instrument.
The two stage cementing joint is the design attitude that is connected the oil well casing string, be lowered in the well of ground certain depth with sleeve pipe, transmit surface instruction by annexes such as ground release openings device, upper and lower plugs, drive and open and close the circulation port of design on body shell, can inject cement paste to the annular space segmentation from bottom to top of well and bunch tube, both reaching realizes long apart from cement sealing to well and casing annulus, can avoid pressure reduction leakage between fluid column that disposable operation produces again, several work problems such as cement paste multiviscosisty midway and pumping difficulty.But also there is following defective in two stage cementing joint of the prior art: 1, in the prior art, its body shell (1) all adopts three layers structure, be that perforate is placed in the body shell, be placed on outside the body shell and close, like this by the restriction of annular space, force the body shell wall thickness can only be controlled in the 10mm, its intensity and quality are a greater impact, cause reliability lower; 2, hermetically-sealed construction is provided with unreasonablely, causes sealing effectiveness bad.
The purpose of this utility model provides a kind of intensity height, good sealing effect, the two stage cementing joint of dependable performance.
The utility model comprises body shell (1), close hole plug (9), Tapper (10) and bottom plug (11) four parts, it is characterized in that having several circulation ports on the circumference of body shell (1) middle part, closing borehole jack (5) and perforate cover (6) places in the body shell (1), on the external diameter of pass borehole jack (5) several sealing ring (12) and lock ring (3) are arranged, the relevant hole of bore ends plug seat (2) in it, closing borehole jack (5) is connected with body shell (1) by shear pin (4), relief hole (14) is arranged on the perforate cover (6), sealing ring (7) is arranged on the external diameter, and be connected with body shell (1) by shear pin (13), Tapper driving fit seat (8) is arranged on the step of hole within it.
Advantage of the present utility model is: 1, body shell (1) adopts two layered structures, be about to close borehole jack (5) and perforate cover (6) and all place in the body shell (1) the weakness of body shell (1) so also to surpass 13mm, thereby improved the intensity of body shell (1) greatly; 2, closing borehole jack (5) design has four road sealing rings (12), and after pass borehole jack (5) put in place, the circulation port both sides all can form double sealing; 3, perforate cover (6) is gone up design relief hole (14) and connectivity slot (15), can discharge the liquid between sliding sleeve closing borehole jack (5) when moving down, thereby guarantee to close smoothly the hole.
Fig. 1 is body shell (a 1) structure chart;
Fig. 2 is for closing hole plug (9) structure chart;
Fig. 3 is Tapper (a 10) structure chart;
Fig. 4 is bottom plug (a 11) structure chart;
Fig. 5 is for closing borehole jack (5) front view;
Fig. 6 is perforate cover (a 6) front view;
The utility model is further specified as follows below in conjunction with drawings and Examples:
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the utility model comprises body shell (1), closes hole plug (9), Tapper (10) and bottom plug (11) four parts.Have four circulation ports on the circumference of body shell (1) middle part as shown in Figure 1, close borehole jack (5) and perforate cover (6) and place in the body shell (1); On the external diameter of pass borehole jack (5) four road sealing rings (12) and lock ring (3) are arranged, the relevant hole of bore ends plug seat (2) in it closes borehole jack (5) and is connected with body shell (1) by shear pin (4); On perforate cover (6) circumference leakage opening (14) is arranged, sealing ring (7) is arranged on its external diameter, and be connected with body shell (1), Tapper driving fit seat (8) is arranged on the step of hole within it by shear pin (13).
As shown in Figure 1, the internal diameter at the circulation port place of body shell (1) is designed to the internal diameter less than shear pin hole place, can guarantee when seal passes through place, shear pin hole injury-freely like this, guarantees that also seal is not drawn out seal groove simultaneously.
As shown in Figure 5, pass borehole jack (5) is gone up design four roads (being divided into two groups) seal groove, after pass borehole jack (5) puts in place, can both realize double sealing in the both sides of circulation port, also design four simultaneously in lock ring groove side and observed groove (16), be convenient to check the situation that puts in place of lock ring (3).
As shown in Figure 6, perforate cover (6) is gone up except that seal groove, also is provided with relief hole (14) and connectivity slot (15).
Work progress of the present utility model is: body shell (1) is connected on is lowered to desired depth on the bunch tube, injecting for the first time in sleeve pipe, cement paste finishes, discharge bottom plug (11) from well head, then in sleeve pipe, pump into flushing fluid, pushing away bottom plug (11) and passing being hindered bottom of tool-joint arrival sleeve pipe.Cement paste is placed in sleeve pipe and the bore hole annulus of joint with hypomere, has replaced and the pump pressure rising by amount of calculation, and the construction of the sign first order finishes.By ground release openings device (10) in sleeve pipe, Tapper (10) relies on own wt to overcome the flushing fluid resistance and comes downwards to joint location, combine with Tapper driving fit seat (8), ground is injection pressure in sleeve pipe, drive perforate cover (6) and get out of the way the circulation port position, make joint set up circulation with epimere.For the second time cement paste is pumped in the sleeve pipe.Finish the back from well head release pass hole plug (9), then in sleeve pipe, pump into flushing fluid again, pushing away hole, pass plug (9) is hindered to reaching joint location, continuation imposes pump pressure in sleeve pipe, drive and close the descending circulation port of turning off of borehole jack (5), lock ring (3) also enters lock ring groove locking pass borehole jack (5) and can not return, and forms sealed-for-life.So far whole construction course finishes.
Claims (5)
1, a kind of oil well cementing two stage cementing joint, comprise body shell (1), close hole plug (9), Tapper (10) and bottom plug (11) four parts, it is characterized in that having several circulation ports on the circumference of body shell (1) middle part, closing borehole jack (5) and perforate cover (6) places in the body shell (1), on the external diameter of pass borehole jack (5) several sealing ring (12) and lock ring (3) are arranged, the relevant hole of bore ends plug seat (2) in it, closing borehole jack (5) is connected with body shell (1) by shear pin (4), relief hole (14) is arranged on the perforate cover (6), sealing ring (7) is arranged on the external diameter, and be connected with body shell (1) by shear pin (13), Tapper driving fit seat (8) is arranged on the step of hole within it.
2, two stage cementing joint according to claim 1, its spy is that the circulation port on the described body shell (1) is four.
3, two stage cementing joint according to claim 1 is characterized in that the sealing ring (12) on described pass borehole jack (5) external diameter is four roads.
4, two stage cementing joint according to claim 1, the internal diameter at circulation port place that it is characterized in that body shell (1) is less than the internal diameter at shear pin hole place.
5, two stage cementing joint according to claim 1 is characterized in that having on the described pass borehole jack (5) observation groove (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94208121 CN2182876Y (en) | 1994-04-05 | 1994-04-05 | Conjunction head for two stage cementing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94208121 CN2182876Y (en) | 1994-04-05 | 1994-04-05 | Conjunction head for two stage cementing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2182876Y true CN2182876Y (en) | 1994-11-16 |
Family
ID=33826230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94208121 Expired - Fee Related CN2182876Y (en) | 1994-04-05 | 1994-04-05 | Conjunction head for two stage cementing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2182876Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532375B (en) * | 2009-04-13 | 2012-07-11 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Method for recycling for failure of stage cementing unit and sealed circulation device |
| CN101319604B (en) * | 2008-05-23 | 2012-08-22 | 安东石油技术（集团）有限公司 | Inverse squeezing tie-back sealing plug |
-
1994
- 1994-04-05 CN CN 94208121 patent/CN2182876Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319604B (en) * | 2008-05-23 | 2012-08-22 | 安东石油技术（集团）有限公司 | Inverse squeezing tie-back sealing plug |
| CN101532375B (en) * | 2009-04-13 | 2012-07-11 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Method for recycling for failure of stage cementing unit and sealed circulation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Drilling Company Of Xinjiang Petroleum Administration Bureau Document name: payment instructions |
|
| 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 |