CN202381044U - Downhole injection device of oil-gas field - Google Patents
Downhole injection device of oil-gas field Download PDFInfo
- Publication number
- CN202381044U CN202381044U CN201120518905XU CN201120518905U CN202381044U CN 202381044 U CN202381044 U CN 202381044U CN 201120518905X U CN201120518905X U CN 201120518905XU CN 201120518905 U CN201120518905 U CN 201120518905U CN 202381044 U CN202381044 U CN 202381044U
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- Prior art keywords
- inner sleeve
- injection device
- hole injection
- outer tube
- gas field
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Abstract
The utility model discloses a downhole injection device of an oil-gas field. The downhole injection device comprises an outer sleeve (1), a check valve (2), an injection pipe (3) and an inner sleeve (4), wherein the check valve (2) and the injection pipe (3) are arranged on the outer side of the outer sleeve (1); the injection pipe (3) is communicated with the inside of the outer sleeve (1) through the check valve (2); the inner sleeve (4) is sleeved in the outer sleeve (1); a discharge pipe (5) communicated with the injection pipe (3) is arranged in the inner sleeve (4); and one end of the discharge pipe (5) extends out of one end of the inner sleeve (4). The position of an injection point of the downhole injection device can be adjusted according to requirements, so that wax precipitation and scale formation are well prevented, and gas is discharged conveniently.
Description
Technical field
The utility model relates to the mining operations of offshore oil and gas field, particularly, relates to a kind of down-hole injection device of oil gas field.
Background technology
At sea in the mining operations of oil gas field; For wax deposition, fouling in the tubing string of the oil gas well that prevents oil gas field or be convenient to problems such as exhaust; Usually can the down-hole injection device be set in the precalculated position of tubing string; With in the chemical agent injection string, chemical agent has the wax deposition of preventing, fouling or is convenient to effect such as exhaust through this down-hole injection device, thereby plays the effect that prevents wax deposition, fouling in the tubing string or be convenient to exhaust.As shown in Figure 1; General down-hole injection device comprises outer tube 1, one way valve 2 and ascending pipe 3; The internal communication of outer tube 1 and tubing string, the arranged outside of the sidewall of sleeve pipe 1 has the one way valve 2 with the internal communication of outer tube 1 outside, and this one way valve 2 is communicated with ground installation through ascending pipe 3.Usually, ascending pipe 3 is arranged in the annular space between sleeve pipe and the tubing string.Chemical agent is through after being arranged on ground measuring pump supercharging; Get in the outer tube 1 through ascending pipe 3, one way valve 2; And then in the inflow tubing string with tubing string in fluid mix the back and rise or descend along tubing string, play the effect that prevents wax deposition, fouling in the tubing string or be convenient to exhaust.
Advantages such as that the down-hole injection device of the type has is simple in structure, reliable operation are used very extensive at present.But this down-hole injection device need stretch into the down-hole and is provided with along with tubing string together, and its degree of depth is fixed on a certain position, can not freely-movable.Needs are adjusted if the down-hole injection device can't satisfy the production needs in this position; Promptly can not bring into play the effect that prevents wax deposition, fouling or be convenient to exhaust fully at this position chemical agent; Must dismantle tubing string and down-hole injection device together through workover treatment and be raised to ground this moment, stretches into the down-hole once more after readjusting the degree of depth of down-hole injection device setting.So again, carry out workover treatment, not only can produce very high operating cost, have higher operating risk simultaneously, make troubles for the position adjustment of down-hole injection device.
The utility model content
The purpose of the utility model provides a kind of down-hole injection device of oil gas field, and this down-hole injection device can be adjusted the position of decanting point as required, thereby realizes the effect prevent wax deposition, fouling and to be convenient to exhaust better.
To achieve these goals; The utility model provides a kind of down-hole injection device of oil gas field; One way valve and ascending pipe that this down-hole injection device comprises outer tube and is arranged on the outside of said outer tube, said ascending pipe is through the internal communication of said one way valve and said outer tube, wherein; Said down-hole injection device comprises inner sleeve; This inner sleeve is socketed in the said outer tube, is provided with the discharge pipe that is communicated with said ascending pipe in the said inner sleeve, and an end of this discharge pipe stretches out from an end of said inner sleeve.
Preferably, be formed with annular groove on the outer wall of said inner sleeve, said discharge pipe is communicated with said ascending pipe through this annular groove.
Preferably, the above and below of said annular groove is respectively arranged with sealing ring.
Preferably, be formed with the rubber-like annular projection on the outer wall of said inner sleeve, be formed with on the inwall of said outer tube and this annular projection corresponding groove, said annular projection is connected in the said groove.
Preferably, the inwall of an end of said outer tube is formed with the stopper section, and an end of said inner sleeve is resisted against on the said stopper section.
Preferably, the inwall of the other end of said inner sleeve forms stepped.
Preferably, be formed with installation portion on the inwall of the bottom of said inner sleeve, said discharge pipe is arranged in the said inner sleeve through this installation portion.
Preferably, the two ends of said outer tube all are formed with the threaded portion.
Pass through technique scheme; The outer tube of the utility model is a wherein joint of the down-hole string of oil gas field; The inside of sleeve pipe input inner sleeve and inner sleeve match with outer tube outside; The chemical agent that makes ground installation (being measuring pump) supply with passes through the inside that ascending pipe, one way valve and discharge pipe flow into inner sleeve and outer tube, thereby chemical agent plays the effect that prevents wax deposition, fouling or be convenient to exhaust along with flowing of fluid.When the position (being the position of an end of discharge pipe) of the decanting point of down-hole injection device in the time of can not satisfying the production needs; Can inner sleeve be salvaged from the down-hole through fishing device etc.; After changing the discharge pipe of certain-length as required then, again inner sleeve is dropped into the inside of outer tube, with the position of the decanting point that changes the down-hole injection device; Make it satisfy demand of practical production, thereby realize the effect prevent wax deposition, fouling or to be convenient to exhaust better.The change that workover treatment promptly realizes the decanting point position be need not carry out like this, operating risk and operating cost reduced, and simple to operation.
Other feature and advantage of the utility model will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of manual, is used to explain the utility model with the following specific embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the sketch map of the down-hole injection device of prior art; And
Fig. 2 is the sketch map of the down-hole injection device of the utility model.
Description of reference numerals
1 outer tube, 2 one way valves
3 ascending pipes, 4 inner sleeves
5 discharge pipes, 6 annular grooves
7 sealing rings, 8 annular projections
9 grooves, 10 threaded portions
11 installation portions, 12 stopper sections
The specific embodiment
Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model.Should be understood that the specific embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
In the utility model; Do not doing under the situation of opposite explanation; The noun of locality that uses typically refers to higher or lower position vertically as shown in Figure 2 like " upper and lower ", and " inside and outside " is meant that sidewall as shown in Figure 2 is with the position beyond interior position or the sidewall.
As shown in Figure 2; The specific embodiment of the utility model provides a kind of down-hole injection device of oil gas field; One way valve 2 and ascending pipe 3 that this down-hole injection device comprises outer tube 1 and is arranged on the outside of said outer tube 1, said ascending pipe 3 is characterized in that through the internal communication of said one way valve 2 with said outer tube 1; Said down-hole injection device comprises inner sleeve 4; This inner sleeve 4 is socketed in the said outer tube 1, is provided with the discharge pipe 5 that is communicated with said ascending pipe 3 in the said inner sleeve 4, and an end of this discharge pipe 5 stretches out from an end of said inner sleeve 4.
The outer tube 1 of the utility model is a wherein joint of the down-hole string of oil gas field; The inside of sleeve pipe 1 input inner sleeve 4 and inner sleeve 4 match with outer tube 1 outside; The chemical agent that makes ground installation (being measuring pump) supply with passes through the inside that ascending pipe 3, one way valve 2 and discharge pipe 5 flow into inner sleeves 4 and outer tube 1, thereby chemical agent plays the effect that prevents wax deposition, fouling or be convenient to exhaust along with flowing of fluid.When the position (being the position of an end of discharge pipe 5) of the decanting point of down-hole injection device in the time of can not satisfying the production needs; Can inner sleeve 4 be salvaged from the down-hole through fishing device etc.; After changing the discharge pipe 5 of certain-length then as required, again inner sleeve 4 is dropped into the inside of outer tubes 1, with the position of the decanting point that changes the down-hole injection device; Make it satisfy demand of practical production, thereby realize the effect prevent wax deposition, fouling or to be convenient to exhaust better.The change that workover treatment promptly realizes the decanting point position be need not carry out like this, operating risk and operating cost reduced, and simple to operation.
As shown in Figure 2, for ease cooperating and installation of inner sleeve 4 and outer tube 1, preferably, be formed with annular groove 6 on the outer wall of said inner sleeve 4, said discharge pipe 5 is communicated with said ascending pipe 3 through this annular groove 6.Annular groove 6 formed around one week of outer wall of inner sleeve 4; Form annular space between the inwall of annular groove 6 and outer tube 1; Thereby the chemical agent that flows into through ascending pipe 3 and one way valve 2 flows in this annular space earlier; Flow in the discharge pipe 5 through this annular space then, finally flow in the tubing string.Because the setting of annular groove 6, making does not need accurate localization can realize being communicated with between discharge pipe 5 and the ascending pipe 3 between outer tube 1 and the inner sleeve, make that the manufacturing of each parts is simple, and easy for installation, practicality is stronger.
For fear of chemical agent from annular groove 6 and the inwall of outer tube 1 between annular space flow out, as shown in Figure 2, preferably, the above and below of said annular groove 6 is respectively arranged with sealing ring 7.Sealing ring 7 can be various types of sealing rings, flows out from annular space as long as can prevent chemical agent, guarantees that chemical agent flows in the tubing string from decanting point, make prevent wax deposition, fouling or be convenient to the effect of exhaust better.
Because the position between inner sleeve 4 and the outer tube 1 needs relative fixed; As shown in Figure 2; Preferably; Be formed with rubber-like annular projection 8 on the outer wall of said inner sleeve 4, be formed with on the inwall of said outer tube 1 and this annular projection 8 corresponding groove 9, said annular projection 8 is connected in the said groove 9.Because annular projection 8 flexible clampings are in groove 9; Annular projection 8 cooperates with groove 9 inner sleeve 4 is positioned at outer tube 1 inside; Make both fix by relative position, thereby prevent inner sleeve 4 from receiving the impact of fluid and move, avoid causing chemical agent normally not inject.
In order further to limit inner sleeve 4 position in the sleeve pipe 1 outside, as shown in Figure 2, preferably, the inwall of an end of said outer tube 1 is formed with stopper section 12, and an end of said inner sleeve 4 is resisted against on the said stopper section 12.Because an end of inner sleeve 4 is resisted against on the stopper section 12, prevent inner sleeve 4 owing to deadweight moves downward, sicula 4 can cooperatively interact with outer tube 1 in making, realizes injecting the function of chemical agent.
As shown in Figure 2, salvage inner sleeve 4 for ease, preferably, the inwall of the other end of said inner sleeve 4 forms stepped.The suspension hooks of fishing device etc. stretch into inner sleeve 4 inside from the other end of inner sleeve 4, thereby cooperate with the stepped inwall of the other end of inner sleeve 4, make inner sleeve 4 be connected with fishing device with inner sleeve 4 from outer tube 1 inner the taking-up.
As shown in Figure 2, the installation of discharge pipe 5 for ease preferably, is formed with installation portion 11 on the inwall of the bottom of said inner sleeve 4, and said discharge pipe 5 is arranged in the said inner sleeve 4 through this installation portion 11.Installation portion 11 makes that the structure of discharge pipe 5 is more firm, installs more convenient.
As shown in Figure 2, preferably, the two ends of said outer tube 1 all are formed with threaded portion 10.Outer tube 1 is connected with the tubing string of above and below through threaded portion 10, and is easy to connect, simple in structure.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned embodiment; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technical scheme of the utility model, these simple variant all belong to the protection domain of the utility model.
Need to prove in addition; Each concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner; For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various embodiment of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (8)
1. the down-hole injection device of an oil gas field; One way valve (2) and ascending pipe (3) that this down-hole injection device comprises outer tube (1) and is arranged on the outside of said outer tube (1); Said ascending pipe (3) is through the internal communication of said one way valve (2) with said outer tube (1); It is characterized in that said down-hole injection device comprises inner sleeve (4), this inner sleeve (4) is socketed in the said outer tube (1); Be provided with the discharge pipe (5) that is communicated with said ascending pipe (3) in the said inner sleeve (4), an end of this discharge pipe (5) stretches out from an end of said inner sleeve (4).
2. the down-hole injection device of oil gas field according to claim 1 is characterized in that, is formed with annular groove (6) on the outer wall of said inner sleeve (4), and said discharge pipe (5) is communicated with said ascending pipe (3) through this annular groove (6).
3. the down-hole injection device of oil gas field according to claim 2 is characterized in that, the above and below of said annular groove (6) is respectively arranged with sealing ring (7).
4. according to the down-hole injection device of any described oil gas field among the claim 1-3; It is characterized in that; Be formed with rubber-like annular projection (8) on the outer wall of said inner sleeve (4); Be formed with on the inwall of said outer tube (1) and this annular projection (8) corresponding groove (9), said annular projection (8) is connected in the said groove (9).
5. the down-hole injection device of oil gas field according to claim 4 is characterized in that, the inwall of an end of said outer tube (1) is formed with stopper section (12), and an end of said inner sleeve (4) is resisted against on the said stopper section (12).
6. according to the down-hole injection device of any described oil gas field among the claim 1-3, it is characterized in that the inwall of the other end of said inner sleeve (4) forms stepped.
7. according to the down-hole injection device of any described oil gas field among the claim 1-3; It is characterized in that; Be formed with installation portion (11) on the inwall of the bottom of said inner sleeve (4), said discharge pipe (5) is arranged in the said inner sleeve (4) through this installation portion (11).
8. according to the down-hole injection device of any described oil gas field among the claim 1-3, it is characterized in that the two ends of said outer tube (1) all are formed with threaded portion (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120518905XU CN202381044U (en) | 2011-12-13 | 2011-12-13 | Downhole injection device of oil-gas field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120518905XU CN202381044U (en) | 2011-12-13 | 2011-12-13 | Downhole injection device of oil-gas field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381044U true CN202381044U (en) | 2012-08-15 |
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ID=46629557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120518905XU Expired - Fee Related CN202381044U (en) | 2011-12-13 | 2011-12-13 | Downhole injection device of oil-gas field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381044U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195393A (en) * | 2013-04-15 | 2013-07-10 | 中国海洋石油总公司 | Anti-pollution thermal washing and paraffin removal unit with dosage channel |
-
2011
- 2011-12-13 CN CN201120518905XU patent/CN202381044U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195393A (en) * | 2013-04-15 | 2013-07-10 | 中国海洋石油总公司 | Anti-pollution thermal washing and paraffin removal unit with dosage channel |
| CN103195393B (en) * | 2013-04-15 | 2016-05-25 | 中国海洋石油总公司 | With the anti-pollution thermal washing paraffin removal unit of injection passage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |