CN204113155U - Underbalance gas injection well washing apparatus - Google Patents
Underbalance gas injection well washing apparatus Download PDFInfo
- Publication number
- CN204113155U CN204113155U CN201420543269.XU CN201420543269U CN204113155U CN 204113155 U CN204113155 U CN 204113155U CN 201420543269 U CN201420543269 U CN 201420543269U CN 204113155 U CN204113155 U CN 204113155U
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- CN
- China
- Prior art keywords
- sleeve
- underbalance
- foaming ring
- ring
- upper bush
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- Expired - Fee Related
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Abstract
The utility model relates to under-balanced drilling technology field, is a kind of underbalance gas injection well washing apparatus; It comprises upper bush, middle sleeve, lower sleeve, screen casing and foaming ring; The lower inside of upper bush and the upper outside of middle sleeve are fixedly installed togather, and the lower inside of middle sleeve and the upper outside of lower sleeve are fixedly installed togather, and have inner groove at the middle part of upper bush.The utility model is rational in infrastructure, easy to use, flushing fluid is filtered by the radial direction through hole on screen casing and enters axial hole, effectively can filter out the impurity in flushing fluid, prevent from blocking steel ball, for providing safeguard smoothly of reacting cycle clean-out service, gas is when foaming ring enters annular space, the cavity of foaming ring can reduce gas flow rate, simultaneously less from entering the bubble that abscess emerges, and is evenly distributed, greatly extend the duration of bubble flow, delay the change of flow state of drilling fluid, improve large rock-carrying ability, drilling efficiency is high.
Description
Technical field
The utility model relates to under-balanced drilling technology field, is a kind of underbalance gas injection well washing apparatus.
Background technology
Aeration drilling is based on fluid, in order to reduce liquid column hydrostatic pressure in well, gas is injected under pressure a kind of under balance pressure drilling mode wherein; Because aerated mud is gas-liquid two-phase fluid-mixing, make in the process that it returns to drilling fluid inflation, the fluidised form of the drilling fluid in well is returned and occurrence dynamics change on drilling fluid is in well, under normal circumstances, during by phost line to down-hole annular gas injection, the single side opening that gas is offered from sleeve pipe through phost line is to annular air injection, due to the flow velocity of gas inject and flow excessive, continuous print bubble can be formed after entering annular space, skewness, cause large rock-carrying ability poor, reduce the efficiency of underbalance aeration drilling.In oil field operation process, for preventing the situation of blocking up of paraffin blockage and dirt in oil pipe from occurring, need to clean in oil pipe, but at present on oil field when carrying out reacting cycle well-flushing due to flushing fluid in there is particle, cause valve to block or fit badly, thus causing well washing effect not good.
Summary of the invention
The utility model provides a kind of underbalance gas injection well washing apparatus, overcomes the deficiency of above-mentioned prior art, large rock-carrying ability difference and well washing effect not good problem when it effectively can solve the gas injection of underbalance air-filling well-drilling.
The technical solution of the utility model is achieved like this: a kind of underbalance gas injection well washing apparatus, comprises upper bush, middle sleeve, lower sleeve, screen casing and foaming ring, the lower inside of described upper bush and the upper outside of middle sleeve are fixedly installed togather, the lower inside of described middle sleeve and the upper outside of lower sleeve are fixedly installed togather, inner groove is had at the middle part of upper bush, the lower inner wall of upper bush circumferentially there are at least two axial holes, described axial hole is three stepped holes that external diameter sequentially becomes large, ball seat is installed with by screw thread in the lower end of each axial hole, steel ball is had at the ball seat seat of honour, Compress Spring is installed with in the upper end of steel ball, the upper end of described Compress Spring is fixed on the lower surface of the top stepped hole, the outer land corresponding with upper bush external diameter is had at the middle part of middle sleeve, screen casing is installed with outside between land and upper bush, the inner chamber of described screen casing communicates with axial hole, installation annular groove is had in the bottom of lower sleeve, foaming ring is installed with on the top of installing annular groove, the lower sleeve corresponding with foaming ring there is radial gas pipeline connecting hole, the outer wall of foaming ring has the gas port be connected with gas pipeline connecting hole with the cavity of foaming ring respectively, the inwall of foaming ring is evenly equipped with can make the cavity of foaming ring and the intracavity inter-connection of lower sleeve enter abscess.
As preferably, the inwall of above-mentioned lower sleeve is provided with screw thread, and being installed with by screw thread in lower sleeve can the pressure cap of spacing fixing foaming ring.
As preferably, above-mentioned foaming ring and install the top of annular groove and foam and be equipped with joint ring between ring and pressure cap.
As preferably, the lower inside of above-mentioned upper bush and the upper outside of middle sleeve are fixedly installed togather by screw thread, and the lower inside of described middle sleeve and the upper outside of lower sleeve are fixedly installed togather by screw thread.
As preferably, above-mentioned enter abscess be skewed.
The utility model is rational in infrastructure, easy to use, flushing fluid is filtered by the radial direction through hole on screen casing and enters axial hole, effectively can filter out the impurity in flushing fluid, prevent from blocking steel ball, for providing safeguard smoothly of reacting cycle clean-out service, gas is when foaming ring enters annular space, the cavity of foaming ring can reduce gas flow rate, simultaneously less from entering the bubble that abscess emerges, and is evenly distributed, greatly extend the duration of bubble flow, delay the change of flow state of drilling fluid, improve large rock-carrying ability, drilling efficiency is high.
Accompanying drawing explanation
Fig. 1 is that master of the present utility model looks broken section structural representation.
Coding in figure is respectively: 1 is upper bush, and 2 is middle sleeve, and 3 is lower sleeve, 4 is screen casing, and 5 is foaming ring, and 6 is ball seat, 7 is steel ball, and 8 is Compress Spring, and 9 is outer land, 10 is gas pipeline connecting hole, 11 be foaming ring cavity, 12 is gas port, 13 for entering abscess, 14 is pressure cap, and 15 is joint ring, and 16 is axial hole.
Detailed description of the invention
As shown in Figure 1, this underbalance gas injection well washing apparatus, comprises upper bush 1, middle sleeve 2, lower sleeve 3, screen casing 4 and foaming ring 5, the lower inside of upper bush 1 and the upper outside of middle sleeve 2 are fixedly installed togather, the lower inside of middle sleeve 2 and the upper outside of lower sleeve 3 are fixedly installed togather, inner groove is had at the middle part of upper bush 1, the lower inner wall of upper bush 1 circumferentially there are at least two axial holes 16, axial hole 16 is three stepped holes that external diameter sequentially becomes large, ball seat 6 is installed with by screw thread in the lower end of each axial hole 16, steel ball 7 is had at ball seat 6 seat of honour, Compress Spring 8 is installed with in the upper end of steel ball 7, the upper end of Compress Spring 8 is fixed on the lower surface of the top stepped hole, the outer land 9 corresponding with upper bush 1 external diameter is had at the middle part of middle sleeve 2, screen casing 4 is installed with outside between land 9 and upper bush 1, the inner chamber of screen casing 4 communicates with axial hole 16, installation annular groove is had in the bottom of lower sleeve 3, foaming ring 5 is installed with on the top of installing annular groove, the lower sleeve 3 corresponding with foaming ring 5 there is radial gas pipeline connecting hole 10, the outer wall of foaming ring 5 has the gas port 12 be connected with gas pipeline connecting hole 10 with the cavity 11 of foaming ring respectively, the inwall of foaming ring 5 is evenly equipped with can make the cavity 11 of foaming ring and the intracavity inter-connection of lower sleeve 3 enter abscess 13, each enter the internal diameter of abscess 13 identical and be less than the internal diameter of gas pipeline connecting hole 10.When well-flushing, flushing fluid is by oil pipe and casing annulus press-in, and flushing fluid is filtered by the radial direction through hole on screen casing 4 and enters axial hole 16, owing to upwards backing down steel ball 7 under fluid pressure effect, enter oil pipe inside by axial hole 16, carry out oil pipe and rinse operation; When stopping well-flushing, flushing fluid is no longer pressed into, and is more than or equal to the pressure in sleeve pipe due to oily overpressure all the time, and now steel ball 7 is on ball seat 6; When flushing fluid has particle, the radial direction through hole on screen casing 4 can filter the impurity in flushing fluid, prevents from blocking steel ball 7 and making setting not tight; When carrying out annular air injection operation, gas enters the cavity 11 of foaming ring from gas pipeline connecting hole 10 through phost line, because flow and the overflowing end face of fluid are inversely proportional to, so drilling fluid is entering cavity 11 flows decrease afterwards of foaming ring; Gas forms bubble when the cavity 11 of foaming ring enters in the drilling fluid of lower sleeve 3 inside, and little and identical owing to entering abscess 13 internal diameter, from entering, the bubble that abscess 13 emerges is less, be evenly distributed, delay the change of flow state of drilling fluid, substantially increase large rock-carrying ability, the efficiency of drilling well is high.
As shown in Figure 1, for the ease of installation and removal, the inwall of described lower sleeve 3 is provided with screw thread, is installed with the pressure cap 14 of the spacing fixing foaming ring 5 of energy in lower sleeve 3 by screw thread.
As shown in Figure 1, described foaming ring 5 and install the top of annular groove and foam between ring 5 and pressure cap 14 and be equipped with joint ring 15; Sealing can be increased like this and prevent foaming ring 5 from being damaged by pressure.
For the ease of installation and removal, the lower inside of described upper bush 1 and the upper outside of middle sleeve 2 are fixedly installed togather by screw thread, and the lower inside of described middle sleeve 2 and the upper outside of lower sleeve 3 are fixedly installed togather by screw thread.
As shown in Figure 1, as required, abscess 13 is entered in skewed.
Claims (6)
1. a underbalance gas injection well washing apparatus, is characterized in that, comprises upper bush (1), middle sleeve (2), lower sleeve (3), screen casing (4) and foaming ring (5), the lower inside of described upper bush (1) and the upper outside of middle sleeve (2) are fixedly installed togather, the lower inside of described middle sleeve (2) and the upper outside of lower sleeve (3) are fixedly installed togather, inner groove is had at the middle part of upper bush (1), the lower inner wall of upper bush (1) circumferentially there are at least two axial holes (16), described axial hole (16) sequentially becomes three large stepped holes for external diameter, ball seat (6) is installed with by screw thread in the lower end of each axial hole (16), steel ball (7) is had at ball seat (6) seat of honour, Compress Spring (8) is installed with in the upper end of steel ball (7), the upper end of described Compress Spring (8) is fixed on the lower surface of the top stepped hole, the outer land (9) corresponding with upper bush (1) external diameter is had at the middle part of middle sleeve (2), screen casing (4) is installed with outside between land (9) and upper bush (1), the inner chamber of described screen casing (4) communicates with axial hole (16), installation annular groove is had in the bottom of lower sleeve (3), foaming ring (5) is installed with on the top of installing annular groove, the lower sleeve (3) corresponding with foaming ring (5) there is radial gas pipeline connecting hole (10), the outer wall of foaming ring (5) has the gas port (12) be connected with gas pipeline connecting hole (10) with the cavity (11) of foaming ring respectively, the inwall of foaming ring (5) is evenly equipped with can make the intracavity inter-connection of the cavity of foaming ring (11) and lower sleeve (3) enter abscess (13), each enter the internal diameter of abscess (13) identical and be less than the internal diameter of gas pipeline connecting hole (10).
2. underbalance gas injection well washing apparatus according to claim 1, it is characterized in that, the inwall of described lower sleeve (3) is provided with screw thread, is installed with the pressure cap (14) of the spacing fixing foaming ring (5) of energy in lower sleeve (3) by screw thread.
3. underbalance gas injection well washing apparatus according to claim 2, it is characterized in that, described foaming ring (5) and install the top of annular groove and foam between ring (5) and pressure cap (14) and be equipped with joint ring (15).
4. the underbalance gas injection well washing apparatus according to claim 1 or 2 or 3, it is characterized in that, the lower inside of described upper bush (1) and the upper outside of middle sleeve (2) are fixedly installed togather by screw thread, and the lower inside of middle sleeve (2) and the upper outside of lower sleeve (3) are fixedly installed togather by screw thread.
5. the underbalance gas injection well washing apparatus according to claim 1 or 2 or 3, is characterized in that, described in enter abscess (13) in skewed.
6. underbalance gas injection well washing apparatus according to claim 4, is characterized in that, described in enter abscess (13) in skewed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420543269.XU CN204113155U (en) | 2014-09-10 | 2014-09-10 | Underbalance gas injection well washing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420543269.XU CN204113155U (en) | 2014-09-10 | 2014-09-10 | Underbalance gas injection well washing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204113155U true CN204113155U (en) | 2015-01-21 |
Family
ID=52330479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420543269.XU Expired - Fee Related CN204113155U (en) | 2014-09-10 | 2014-09-10 | Underbalance gas injection well washing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204113155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201453A (en) * | 2015-09-23 | 2015-12-30 | 西南石油大学 | Quantitative thin oil blending valve for viscous oil thin-oil-blended exploitation |
-
2014
- 2014-09-10 CN CN201420543269.XU patent/CN204113155U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201453A (en) * | 2015-09-23 | 2015-12-30 | 西南石油大学 | Quantitative thin oil blending valve for viscous oil thin-oil-blended exploitation |
| CN105201453B (en) * | 2015-09-23 | 2017-05-10 | 西南石油大学 | Quantitative thin oil blending valve for viscous oil thin-oil-blended exploitation |
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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: 20150121 Termination date: 20150910 |
|
| EXPY | Termination of patent right or utility model |