CN210483555U - Tubular column for quickly producing after well killing of gas well - Google Patents
Tubular column for quickly producing after well killing of gas well Download PDFInfo
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- CN210483555U CN210483555U CN201921017078.9U CN201921017078U CN210483555U CN 210483555 U CN210483555 U CN 210483555U CN 201921017078 U CN201921017078 U CN 201921017078U CN 210483555 U CN210483555 U CN 210483555U
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- 229910052757 nitrogen Inorganic materials 0.000 description 4
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Abstract
The utility model provides a tubular column that is used for quick recurrence behind gas well kill-job, including oil pipe, sliding sleeve, packer and blanking plug, oil pipe lower extreme from the top down sliding sleeve, packer and blanking plug have connected gradually. The utility model discloses have can be fast the recurrence, satisfy the later stage production simultaneously, simplify the on-the-spot technology, improve the efficiency of construction, the effect of protection gas well productivity. The utility model discloses a disposable minor diameter compound production integration tubular column of going into down behind the gas well kill-job for build a runner less than pit shaft low pressure and latus rectum little for the gaseous upward flow velocity of returning of well in accelerates, improve it and take the liquid ability, reduce the shaft bottom hydrops, reduce the shaft bottom return pressure, satisfy later stage production needs simultaneously. The utility model discloses have quick reproduction and satisfy the technical advantage of later stage production, simplified the site technology simultaneously, improved the efficiency of construction, have extremely important effect to the protection of gas well productivity.
Description
Technical Field
The utility model relates to a tubular column that is used for quick recurrence after gas well kill-job.
Background
For the gas well which can not perform casing fracturing and needs to be modified by an oil pipe separate-layer fracturing tool due to the adoption of staged well cementation, the problem can be solved by timely pulling out after fracturing is completed and then putting in a small-diameter oil pipe for production due to the existence of a plurality of packers, hydraulic anchor tools and difficult pulling out of a later-stage pipe column. The pipe string needs well killing operation, if induced blowout is not timely after well killing, well killing liquid blocks the bottom layer or residual liquid in a well shaft in an alternate blowout link causes large well bottom back pressure, a reservoir stratum is damaged or the well is pressed to be dead, and the yield and the service life of a gas well are seriously influenced. At present, after a well killing and pipe string lifting is adopted on site, a production pipe is grouted and lowered, then coiled tubing liquid nitrogen gas lift mode is adopted for induced flow drainage, the induced flow drainage needs coiled tubing operation and corresponding tools and is easily limited by coiled tubing equipment organization, the drilling-out procedures after the well killing and the lowering are multiple and long, the induced flow drainage is not timely, the re-production effect is not ideal, and meanwhile, the inner diameter of the lowered production pipe string is limited to consider the requirement of the coiled tubing at the later stage, and the productivity exertion of a gas well in the later stage is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome induced flow liquid after the on-the-spot kill-job and need coiled tubing operation, easily receive coiled tubing equipment organization restriction, and press the after-poppet, the lower drilling process is many, the cycle length, on-the-spot resultants the effect unsatisfactory, the production string internal diameter under place is gone into required great under coiled tubing, influences the problem of gas well productivity performance, the utility model provides a tubular column that is used for quick resultants after the gas well kill-job, the utility model discloses a go into minor diameter resultants production integration tubular column under once only after the gas well kill-job, artificially build a runner less than pit shaft low pressure and latus rectum for gas upward returns the velocity of flow in the acceleration well, improves its liquid carrying capacity, reduces the bottom hole hydrops, reduces bottom hole backpressure, satisfies later stage production needs simultaneously. The utility model discloses have quick reproduction and satisfy the technical advantage of later stage production, simplified the site technology simultaneously, improved the efficiency of construction, have extremely important effect to the protection of gas well productivity.
The utility model adopts the technical proposal that:
the utility model provides a tubular column that is used for quick recurrence after gas well kill-job, includes oil pipe, sliding sleeve, packer and blanking plug, oil pipe lower extreme from the top down connect gradually sliding sleeve, packer and blanking plug.
The oil pipe is a small-diameter oil pipe.
The sliding sleeve is an openable sliding sleeve.
The packer is a compression packer.
The well entering state of the blanking plug is a closed state.
The utility model has the advantages that:
the utility model provides a tubular column for quick recurrence after gas well kill, through once only running down minor diameter recurrence flowing back production tubular column operation after gas well kill, artificially provide a lower and less latus rectum fluid passage than wellbore pressure, accelerate the gaseous upward flow velocity in the well, improve its liquid carrying capacity, reduce the shaft bottom hydrops, reduce shaft bottom backpressure, resume gas well productivity fast, satisfy the needs of later stage production simultaneously, it has solved the induced flow flowing back that needs continuous oil pipe operation after the on-the-spot kill, easily receive continuous oil pipe equipment organization restriction, and it is many to play after pressing, the process of drilling down, the cycle length is long, the on-the-spot recurrence effect is unsatisfactory, the production tubular column internal diameter that drops down needs great by continuous oil pipe, influence the shortcoming that the productivity of gas well exerts, the utility model has the technical advantages of quick recurrence and satisfying the later stage production, the on-the-spot technology has been simplified simultaneously, construction efficiency has been improved, the method has an extremely important function on the production capacity protection of the gas well.
The following will be further described with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of the utility model relates to a quick recurrence string after gas well kill.
In the figures, the reference numbers are: 1. an oil pipe; 2. a sliding sleeve; 3. a packer; 4. an obturator.
Detailed Description
Example 1:
in order to overcome induced flow liquid after the on-the-spot kill-job and need coiled tubing operation, easily receive coiled tubing equipment organization restriction, and press the back and play, the lower process is many, the cycle length, on-the-spot resultants effect is unsatisfactory, and the production string internal diameter is gone into required great under coiled tubing under the institute, influences the problem of gas well productivity performance, the utility model provides a tubular column that is used for quick resultants after the gas well kill-job as shown in figure 1, the utility model discloses a go into minor diameter resultants production integration tubular column under once only after the gas well kill-job, artificially build a runner less than pit shaft low pressure and latus rectum for gas upward returns the velocity of flow in the acceleration well, improve its liquid carrying ability, reduce the bottom hole hydrops, reduce bottom hole backpressure, satisfy later stage production needs simultaneously. The utility model discloses have quick reproduction and satisfy the technical advantage of later stage production, simplified the site technology simultaneously, improved the efficiency of construction, have extremely important effect to the protection of gas well productivity.
The utility model provides a tubular column that is used for quick recurrence after gas well kill-job, includes oil pipe 1, sliding sleeve 2, packer 3 and blanking plug 4, oil pipe lower end on from the top down have connected gradually sliding sleeve 2, packer 3 and blanking plug 4.
The utility model provides a pair of a tubular column ware working process that is used for quick recurrence behind gas well killing does: the specific operation after the operation of the production and reproduction integrated tubular column is carried out; lowering the pipe column to a target position, wherein the target position is preferably that the downward pulling force generated by the seal annular liquid of the packer 3 on the pipe column is not less than the maximum upward jacking force generated by the gas-liquid upward return of the pipe column; setting the packer 3; injecting gas (natural gas or liquid nitrogen) into the pipe column, pressurizing and opening a plug 4 at the lower end of the pipe column, controlling the blowout displacement of the oil pipe in due time, controlling the blowout displacement of the oil pipe to ensure that the gas in the well has a high flow rate, and returning the liquid in the well to a well head through the plug 4 to be discharged; open "can open" sliding sleeve 2 through the steel wire operation mode, control oil pipe blowout discharge capacity in good time, control oil pipe blowout discharge capacity is in order to ensure that the well gas has the higher velocity of flow to be suitable, and packer 3 is above the oil jacket annular space liquid and is returned to the well head through "can open" sliding sleeve 2 and discharge.
The utility model discloses a disposable minor diameter compound production integration tubular column of going into down behind the gas well kill-job for build a runner less than pit shaft low pressure and latus rectum little for the gaseous upward flow velocity of returning of well in accelerates, improve it and take the liquid ability, reduce the shaft bottom hydrops, reduce the shaft bottom return pressure, satisfy later stage production needs simultaneously. The utility model discloses have quick reproduction and satisfy the technical advantage of later stage production, simplified the site technology simultaneously, improved the efficiency of construction, have extremely important effect to the protection of gas well productivity.
Example 2:
based on embodiment 1, in this embodiment, the oil pipe 1 is a small-diameter oil pipe.
Sliding sleeve 2 for can opening the sliding sleeve, sliding sleeve 2's spout equivalent diameter is less to discharge the annular water yield more than packer 3 and be enough to be carried to the well head by the pit shaft tolerance and be the upper limit.
The packer 3 is a compression packer. The state of the packer 3 can be tail pipe hanging in a fixed mode, setting by lifting or rotating a pipe column, setting by lifting or rotating the pipe column, and unsetting by lifting or rotating the pipe column.
The well plugging state of the blanking plug 4 is a closed state.
A method for quickly recovering production after killing a gas well comprises the following specific steps:
killing a well, fracturing a separate layer of a pipe column,
step two, running the production-recovery integrated pipe column operation, and setting the packer 3 after the pipe column is put in place; opening a plug 4 at the lower end of the pipe column, controlling the blowout displacement of the oil pipe, and returning liquid in the well to a well head through a plug to be discharged; opening the sliding sleeve 2, controlling the open flow discharge of the oil pipe, and returning the annular liquid of the oil sleeve above the packer 3 to the wellhead through the sliding sleeve 2 to be discharged;
and step three, opening the well for production.
In the second step, the downward pulling force generated by the annular liquid sealed by the packer 3 on the pipe column at the lowering target position of the pipe column is not less than the maximum upward jacking force generated by the gas-liquid upward return of the pipe column.
In the second step, the opening mode of the pipe column bottom plug 4 is that the pipe column is opened by injecting gas into the pipe column and pressurizing the pipe column, wherein the gas is natural gas or liquid nitrogen.
In the second step, the opening mode of the pipe column bottom end plug 4 is that the empty well casing throwing tool is opened by utilizing the falling impact force of the empty well casing throwing tool.
The utility model provides an oil pipe 1 is minor diameter oil pipe, and oil pipe 1's diameter is less than used oil pipe in step one well killing well, still need satisfy step two middle and later stages simultaneously and take the normal production requirement of liquid.
As fig. 1 shows a pipe string according to an embodiment of the present invention, it can be seen from fig. 1 that the pipe string has the following composition (from top to bottom): the oil pipe 1 plus can open the sliding sleeve 2 plus the packer 3 plus the blanking plug 4. Wherein oil pipe 1 is minor diameter oil pipe, and the diameter is less, and the gas flow rate is big more, and the flowing back ability is stronger, and the spout equivalent diameter that "can open" sliding sleeve 2 should be less to the annular water yield more than the drainage packer is enough to be carried to the well head by the pit shaft tolerance and is the upper limit. The packer 3 is a compression type, fixed tail pipe hanging, lifting or rotating pipe column setting, lifting or rotating pipe column deblocking combined packer. The blanking plug 4 is in the closed position.
The utility model discloses embodiment's operation method, it includes: killing the well and fracturing the tubular column in separate layers; the lower complex production integrated pipe column; and (5) well opening and production. The specific operation after the lower complex production integrated tubular column operation is as follows; lowering the pipe column to a proper position, wherein the target position is preferably that the downward pulling force generated by the annular liquid sealed by the packer on the pipe column is not less than the maximum upward jacking force generated by the gas-liquid upward return of the pipe column; setting the packer 3; injecting gas (natural gas or liquid nitrogen) into the pipe column, pressurizing and opening a plug 4 at the lower end of the pipe column, controlling the blowout displacement of an oil pipe, controlling the blowout displacement of the oil pipe to ensure that gas in the well has a high flow rate, and returning liquid in the well to a well head through the plug 4 to be discharged; open "can open" sliding sleeve 2 through the steel wire operation mode, control oil pipe open flow discharge capacity is in order to ensure that the well gas has the higher velocity of flow as suitable, and packer 3 is above the oil jacket annular space liquid and is returned to the well head through "can open" sliding sleeve 2 and discharge.
Preferably, the string bottom plug 4 is opened in such a way that the tool is thrown empty into the well by means of pressure.
Preferably, the string bottom plug 4 is opened in such a manner that the empty wellbore servicing tool is opened by the impact of its fall.
Preferably, the pipe column bottom end plug 4 is opened in a manner that a tool is thrown into the pipe column and gas (natural gas or liquid nitrogen) is injected into the pipe column at the same time for pressurization.
Preferably, the openable sliding sleeve 2 is opened by a steel wire operation mode.
Preferably, the openable sliding sleeve 2 is opened by a coiled tubing operation mode.
Preferably, the openable sliding sleeve 2 is opened by the hydraulic action of a pressurized rupture disk in the oil pipe.
The utility model provides a tubular column for quick recurrence after gas well kill, through once only running down minor diameter recurrence flowing back production tubular column operation after gas well kill, artificially provide a lower and less latus rectum fluid passage than wellbore pressure, accelerate the gaseous upward flow velocity in the well, improve its liquid carrying capacity, reduce the shaft bottom hydrops, reduce shaft bottom backpressure, resume gas well productivity fast, satisfy the needs of later stage production simultaneously, it has solved the induced flow flowing back that needs continuous oil pipe operation after the on-the-spot kill, easily receive continuous oil pipe equipment organization restriction, and it is many to play after pressing, the process of drilling down, the cycle length is long, the on-the-spot recurrence effect is unsatisfactory, the production tubular column internal diameter that drops down needs great by continuous oil pipe, influence the shortcoming that the productivity of gas well exerts, the utility model has the technical advantages of quick recurrence and satisfying the later stage production, the on-the-spot technology has been simplified simultaneously, construction efficiency has been improved, the method has an extremely important function on the production capacity protection of the gas well.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The device structure and the method thereof, which are not described in detail in this embodiment, belong to the well-known technology and the common method in the industry, and are not described herein.
Claims (5)
1. A tubular column that is used for quick recurrence after gas well kill, its characterized in that: the packer comprises an oil pipe (1), a sliding sleeve (2), a packer (3) and a packer (4), wherein the sliding sleeve (2), the packer (3) and the packer (4) are sequentially connected to the lower end of the oil pipe (1) from top to bottom.
2. The string for rapid recovery after killing of a gas well as recited in claim 1, wherein: the oil pipe (1) is a small-diameter oil pipe.
3. The string for rapid recovery after killing of a gas well as recited in claim 1, wherein: the sliding sleeve (2) is an openable sliding sleeve.
4. The string for rapid recovery after killing of a gas well as recited in claim 1, wherein: the packer (3) is a compression packer.
5. The string for rapid recovery after killing of a gas well as recited in claim 1, wherein: the well entering state of the blanking plug (4) is a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921017078.9U CN210483555U (en) | 2019-07-02 | 2019-07-02 | Tubular column for quickly producing after well killing of gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921017078.9U CN210483555U (en) | 2019-07-02 | 2019-07-02 | Tubular column for quickly producing after well killing of gas well |
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| Publication Number | Publication Date |
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| CN210483555U true CN210483555U (en) | 2020-05-08 |
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| CN201921017078.9U Active CN210483555U (en) | 2019-07-02 | 2019-07-02 | Tubular column for quickly producing after well killing of gas well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306938A (en) * | 2019-07-02 | 2019-10-08 | 中国石油天然气股份有限公司 | Tubular column and method for rapid recovery after well killing of gas well |
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2019
- 2019-07-02 CN CN201921017078.9U patent/CN210483555U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306938A (en) * | 2019-07-02 | 2019-10-08 | 中国石油天然气股份有限公司 | Tubular column and method for rapid recovery after well killing of gas well |
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