CN215672164U - Jet pump lifting process pipe column capable of being repeatedly acidified in offshore oil field - Google Patents
Jet pump lifting process pipe column capable of being repeatedly acidified in offshore oil field Download PDFInfo
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- CN215672164U CN215672164U CN202122180398.XU CN202122180398U CN215672164U CN 215672164 U CN215672164 U CN 215672164U CN 202122180398 U CN202122180398 U CN 202122180398U CN 215672164 U CN215672164 U CN 215672164U
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Abstract
A jet pump lifting process pipe column capable of being repeatedly acidified in an offshore oilfield comprises: the device comprises a wellhead catcher arranged on a wellhead, a production oil pipe, a temperature and pressure measuring device, a hydraulic throwing and fishing jet pump, an acidification isolation sleeve, a deep well safety valve, a sand blocking cup, a production packer, an insert seal, a top packer and a sieve pipe, wherein the production oil pipe, the temperature and pressure measuring device, the hydraulic throwing and fishing jet pump, the acidification isolation sleeve, the deep well safety valve, the sand blocking cup, the production packer, the insert seal, the top packer and the sieve pipe are sequentially arranged below the wellhead catcher; wherein, an outer sleeve is also arranged between the wellhead catcher and the production tubing, a production casing is arranged below the outer sleeve, and an annular space is arranged between the production tubing and the production casing; a multi-stage ball seat is arranged below the production oil pipe and is arranged below the production packer; and the lower end of the production oil pipe penetrates through the top packer and extends into the sand prevention section of the oil layer. The utility model not only seals and separates the annular space of the oil sleeve and the flow channel of the production oil pipe; moreover, the problem of long-term high-pressure production of the sleeve is also avoided; and multiple rounds of acidification, flowback and production can be carried out, and the development benefit of the offshore mid-deep oil field is improved.
Description
Technical Field
The utility model belongs to the technical field of oilfield exploitation, and particularly relates to a jet pump lifting process pipe column capable of acidizing offshore oilfields in multiple rounds.
Background
At present, in the Bohai sea oil field, the reserve capacity of a medium-deep layer reservoir is large, and the yield and the specific gravity are also large, so that the method is an important support for the continuous and stable production of the Bohai sea oil field for the efficient development of the medium-deep layer. Because the oil deposit depth of the medium-depth reservoir exceeds 3000m, the temperature is higher, and the physical properties of the reservoir are mainly of a medium-pore medium-permeability reservoir and a low-permeability reservoir; and the reservoir fluid is relatively complex, and most of the reservoir fluid has the characteristics of low density, low viscosity, medium content of colloid asphaltene, high wax content, high freezing point and the like. As the development of the production oil field enters the middle and later stages, the lifting contradiction generated by the development of the production oil field is increasingly prominent due to the complex well conditions of the middle and deep layers. Therefore, the existing lifting processes such as self-blowing, electric pump, gas lift, linear motor reciprocating pump and the like are difficult to meet the production requirements of complex well conditions in the middle and deep layers. When the special well conditions such as high temperature in the middle and deep layers, deep pumping, complex well fluid and the like are met, the following solutions are generally adopted:
one is as follows: when the electric submersible pump is adopted for production, the phenomena of overheating of a unit, evacuation of the electric submersible pump and underload shutdown are easily caused, so that the service life of the electric submersible pump is short, and the development benefit of an oil well is seriously influenced.
The second step is as follows: when a jet pump is used for production (the jet pump is an important artificial lifting mode), the energy of high-pressure power fluid injected into a well can be transferred to downhole oil production fluid and lift the downhole oil production fluid to the ground. The lifting mode has a simple underground structure, can utilize the thermal and chemical characteristics of the power fluid, is suitable for high-condensation oil, thick oil and high-wax oil wells, and has good adaptability to the lifting of offshore cluster wells.
In order to meet the production requirements of deep complex well conditions, the oil reservoir must be modified. And the acidification treatment of the oil well is an important measure for oil layer transformation and oil well yield increase. The acid solution can be injected into the stratum, carbonate rocks, clay minerals and the like in the rocks are corroded by the acid solution, and the permeability of an oil layer is improved.
In the petroleum industry, a jet pump is often used as a drainage technology after acidizing or fracturing, and the publication number is as follows: CN200310122067.4, the name of which is "stratum acidification or fracturing and jet pump combined liquid discharge process system", the publication number is CN20062002512.2, the name of which is "stratum acidification or fracturing and jet pump combined liquid discharge device", both of which disclose a stratum acidification or fracturing and jet pump combined liquid discharge process and a stratum acidification or fracturing and jet pump combined liquid discharge device, comprising: the jet pump can throw a jet pump core in an oil pipe or a drill rod; they all have a common characteristic that after acidification or fracturing, a flow pump core can be thrown into an oil pipe or a drill pipe, so that continuous and rapid liquid drainage is realized. However, since the above two published patents are relatively suitable for rapid drainage after acidification or fracturing, not only multiple rounds of acidification cannot be realized, but also long-term production cannot be performed by using a jet pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a jet pump lifting process pipe column capable of realizing multiple rounds of acidification in an offshore oilfield, and aims to solve the technical problems of multiple rounds of acidification treatment and incapability of using a jet pump for long-term production.
In order to achieve the purpose, the specific technical scheme of the jet pump lifting process pipe column capable of acidizing the offshore oil field for multiple times is as follows:
a jet pump lifting process pipe column capable of being repeatedly acidified in an offshore oilfield comprises: the device comprises a wellhead catcher arranged at the upper end of a wellhead, a production oil pipe, a temperature and pressure measuring device, a hydraulic throwing and fishing jet pump, an acidification isolation sleeve, a deep well safety valve, a sand blocking leather cup, a production packer, an insert seal, a top packer and a sieve pipe which are sequentially arranged below the wellhead catcher; wherein, an outer sleeve is also arranged between the wellhead catcher and the production tubing, the production tubing is arranged below the flange disc of the outer sleeve, the production tubing is arranged in the production tubing, and an annular space is arranged between the production tubing and the production tubing; a multistage ball seat is arranged below the production oil pipe and below the production packer; and the lower end of the production oil pipe penetrates through the top packer and extends into the sand prevention section of the oil layer.
Further, the outer sleeve is in a step shape; a plurality of signal transmission cables are arranged below the flange plate of the outer sleeve; one end of the signal transmission cable is connected with the deep well safety valve; the other end is connected with the deep well safety valve through a pipeline protection short joint.
Furthermore, a hydraulic anchor is arranged in an annular space between the production oil pipe and the production casing pipe, and the hydraulic anchor is arranged below the sand blocking leather cup; the hydraulic anchor can effectively avoid power fluid, and under a long-term high-pressure working condition, the pipe column is axially displaced and anchored; the sand blocking leather cup can effectively block sand during production, and prevent a production packer from being buried by sand.
Further, after the hydraulic throwing and fishing jet pump is lowered into a preset position, the hydraulic throwing and fishing jet pump is seated in the acidification isolation sleeve through the sealing end face and lifted out to a wellhead catcher; and the space between the upper end of the hydraulic throwing and fishing jet pump and the production oil pipe is as follows: the high-pressure power fluid channel is arranged in the space of the production oil pipe at the lower end of the hydraulic throwing and fishing jet pump: the stratum produces a hydraulic channel, and an annular channel between the production casing and the production oil pipe is a mixed produced fluid channel.
Furthermore, the acidification isolation sleeve can be closed by putting the isolation jet pump, and has an oil pipe acidification function.
Further, the multistage ball seat sets up to tertiary ball seat to adopt the steel ball to throw the ball seat and seal, it can form through pressing the shear pin and flow through the passageway, and the ball seat size increases step by step from bottom to top.
Further, temperature measurement pressure measurement device is pressure gauge in the pit, and this pressure gauge in the pit can monitor power fluid injection temperature and pressure in the oil jacket annular space, stratum production liquid temperature and pressure in the oil pipe simultaneously to realize the online real-time supervision of oil well production developments and jet pump operating condition.
Furthermore, a seal is arranged between the production packer and the production casing, and the seal is made of fluororubber.
Further, a seal is arranged between the hydraulic throwing and fishing jet pump and the acidification isolation sleeve, and the seal is made of fluororubber.
Furthermore, a seal is arranged between the inserting seal and the top packer, and the seal is made of fluororubber.
The jet pump lifting process pipe column capable of acidizing for multiple rounds in the offshore oil field has the following advantages:
1) the utility model effectively seals and separates the annular space of the oil sleeve and the flow channel of the production oil pipe respectively by utilizing the production packer and the deep well safety valve, thereby ensuring the safety of offshore operation.
2) The utility model adopts a positive circulation lifting mode, effectively avoids the problem of long-term high-pressure production of the casing and ensures the integrity of the shaft.
3) The hydraulic throwing and fishing jet pump downhole tool adopted by the utility model has the advantages of simple structure, reliable performance, simple and convenient hydraulic throwing and fishing mode and stable lifting device.
4) The utility model realizes that the multi-turn acidification, the flowback and the production can be carried out without moving the pipe column, thereby greatly reducing the operation cost for using the pipe column and improving the development benefit of the offshore mid-deep oil field.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
The notation in the figure is:
1. a wellhead catcher; 2. producing a sleeve; 3. producing an oil pipe; 4. a temperature and pressure measuring device; 5. a signal transmission cable; 6. hydraulically throwing and fishing the jet pump; 7. acidifying the isolation sleeve; 8. a deep well safety valve; 9. a pipeline protection nipple; 10. a sand blocking leather cup; 11. producing a packer; 12. inserting and sealing; 13. a top packer; 14. a screen pipe; 15. a hydraulic anchor; 16. a multistage ball seat.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the jet pump lifting process pipe column capable of multi-turn acidification in offshore oil field is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention includes: the device comprises a wellhead catcher 1 arranged at the upper end of a wellhead, a production oil pipe 3, a temperature and pressure measuring device 4, a hydraulic throwing and fishing jet pump 6, an acidification isolation sleeve 7, a deep well safety valve 8, a sand blocking cup 10, a production packer 11, an insert seal 12, a top packer 13 and a sieve pipe 14, wherein the production oil pipe 3, the temperature and pressure measuring device, the hydraulic throwing and fishing jet pump 6, the acidification isolation sleeve 7, the deep well safety valve 8, the sand blocking cup 10, the production packer 11, the insert seal 12 and the sieve pipe 14 are sequentially arranged below the wellhead catcher 1; wherein, a step-shaped outer sleeve is also arranged between the wellhead catcher 1 and the production tubing 3, the production tubing 2 is arranged below the flange disc of the outer sleeve, the production tubing 3 is arranged in the production tubing 2, an annular space is arranged between the production tubing 3 and the production tubing 2, and a hydraulic anchor 15 is also arranged in the annular space; the hydraulic anchor 15 is arranged below the sand-blocking leather cup 10;
a plurality of (in this embodiment, one for each of the left and right) signal transmission cables 5 are mounted below the flange of the outer sleeve; one end of the right side of the signal transmission cable 5 is connected with a deep well safety valve 8; one end of the left side is connected with a deep well safety valve 8 through a pipeline protection nipple 9;
a hydraulic anchor 15 is also arranged in the annular space between the production oil pipe 3 and the production casing 2, and the hydraulic anchor 15 is arranged below the sand-blocking leather cup 10;
below the inside of the production tubing 3, there is also provided a multi-stage ball seat 16, which multi-stage ball seat 16 is provided below the production packer 11.
The lower end of the production oil pipe 2 penetrates through the top packer 13 and extends into the sand prevention section of the oil layer;
the hydraulic throwing and fishing jet pump 6 can be put into a preset position in a positive pressurizing mode through the production oil pipe 3, is seated in the acidification isolation sleeve 6 through the sealing end face, and is lifted out to the wellhead catcher 1 in an oil sleeve annulus counter-pressurizing mode;
the space between the upper end of the hydraulic throwing and fishing jet pump 6 and the production oil pipe 3 is as follows: the high-pressure power liquid channel is arranged in the space of the production oil pipe 3 at the lower end of the hydraulic throwing and fishing jet pump 6: a hydraulic channel is produced in the stratum, and an annular channel between the production casing 2 and the production oil pipe 3 is a mixed produced fluid channel;
the acidification isolation sleeve 7 can be closed by putting the isolation jet pump 6 into the acidification isolation sleeve 7, and has an oil pipe acidification function;
the multistage ball seat 16 is set to be a three-stage ball seat, and is seated by using steel balls, and can form a flow passage by pressing and shearing pins, and the size of the ball seat is increased from bottom to top step by step.
The sealing between the hydraulic throwing and fishing jet pump 6 and the acidification isolation sleeve 7, the sealing between the production packer 11 and the production casing 2, and the sealing between the insertion seal 12 and the top packer 13 all adopt fluororubber.
The temperature and pressure measuring device 4 is a downhole pressure gauge. The downhole pressure gauge can monitor the injection temperature and pressure of power fluid in the annular space of the oil sleeve and the temperature and pressure of stratum produced fluid in an oil pipe simultaneously so as to realize the online real-time monitoring of the production dynamic state of an oil well and the working state of a jet pump.
The sand blocking leather cup 10 can effectively block sand during production and prevent the production packer 11 from being buried by sand.
The production packer 11 is reliable in setting and flexible in unsetting, and effectively avoids the long-term high-pressure work of the top packer 13.
The hydraulic anchor 15 can effectively avoid power fluid, and under the long-term high-pressure working condition, the tubular column is axially displaced and anchored.
The specific process of the utility model is as follows:
putting a production string:
the method comprises the steps of running a pipe string of a production oil pipe 3, and determining the running depth of an acidizing isolation sleeve and a hydraulic throwing and fishing jet pump according to the production condition of an oil well;
secondly, a first round of acidification treatment: back pressure is applied to the annular space between the production casing 2 and the production oil pipe 3, and acid liquor is injected from the production oil pipe 3;
after the acidification is finished, putting the steel ball into the ball seat at the lowest stage, putting the hydraulic throwing and fishing jet pump 6 into the production oil pipe 3, and setting the hydraulic throwing and fishing jet pump in the acidification isolation sleeve; high-pressure power liquid is injected into the production oil pipe 3, the high-pressure power liquid is produced by the oil sleeve annulus after the jet pump 6 is hydraulically thrown and fished, and the high-pressure power liquid is transferred to the hydraulic throwing and fishing jet pump 6 for production after the acid liquid is discharged back;
fourthly, the second round is acidified and hydraulically thrown and fished: determining the second round of acidification time according to the production requirement of the oil well; high-pressure power liquid is injected into the hollow part of the oil sleeve ring, and the hydraulic throwing and fishing jet pump 6 is fished out and recycled to the wellhead catcher 1 through reverse circulation;
fifthly, putting the isolation jet pump 6 into the production oil pipe 3, setting the isolation jet pump in the acidification isolation sleeve 7, driving high-pressure fluid into the production oil pipe 3, and driving the lowest ball seat to form a flow passage;
sixthly, back pressure is applied to the oil sleeve annulus, and acid liquor is injected from a production oil pipe;
after acidification is finished, putting steel balls into the second-stage ball seat, putting a hydraulic throwing jet pump 6 into the production oil pipe 3, setting the hydraulic throwing jet pump in a working cylinder of the hydraulic throwing jet pump, injecting high-pressure power liquid into the production oil pipe 3, throwing the high-pressure power liquid into the hydraulic throwing jet pump 6, producing the high-pressure power liquid in an oil sleeve annulus, and transferring the high-pressure power liquid into a jet pump for production after acid liquid is returned;
a third round of acidification: determining a third acidification time according to the production requirement of the oil well; high-pressure power liquid is injected into the oil sleeve ring cavity, and a pump core of the hydraulic throwing and fishing jet pump 6 is fished out through reverse circulation and circulates to the wellhead catcher 1;
the self-skin is put into an isolation jet pump in a production tubing and is seated in an acidification isolation sleeve; high-pressure fluid is injected into the production oil pipe 3, and the ball seat at the lowest stage is injected to form a flow passage;
the back pressure is exerted on the oil sleeve annulus, and acid liquor is injected from the production oil pipe 3;
after the acidification is finished, putting the steel ball into a third-stage ball seat, putting a pump core of the hydraulic throwing and fishing jet pump 6 into the production oil pipe 3, and setting the pump core in a working barrel of the hydraulic throwing and fishing jet pump 6;
high-pressure power liquid is injected into the production oil pipe 3, the jet pump 6 is thrown and fished through hydraulic force, the output is carried out through the oil sleeve annulus, and the production is carried out through the hydraulic throwing and fishing jet pump 6 after acid liquid is drained back.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixed or detachably or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The above well mouth catcher, production casing, production tubing, temperature and pressure measuring device, signal transmission cable, hydraulic throwing and fishing jet pump, deep well safety valve, pipeline protection short section, sand blocking leather cup, production packer, plug-in seal, top packer, sieve tube, hydraulic anchor and ball seat are prior art, and the unexplained technology is prior art, so that the details are not repeated.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a but offshore oil field multiple round acidizing's jet pump lifts technology tubular column which characterized in that includes: the device comprises a wellhead catcher arranged at the upper end of a wellhead, a production oil pipe, a temperature and pressure measuring device, a hydraulic throwing and fishing jet pump, an acidification isolation sleeve, a deep well safety valve, a sand blocking leather cup, a production packer, an insert seal, a top packer and a sieve pipe which are sequentially arranged below the wellhead catcher; wherein the content of the first and second substances,
an outer sleeve is further installed between the wellhead catcher and the production oil pipe, a production sleeve is installed below a flange disc of the outer sleeve, the production oil pipe is arranged in the production sleeve, and an annular space is arranged between the production oil pipe and the production sleeve;
a multistage ball seat is arranged below the production oil pipe and below the production packer; and the lower end of the production oil pipe penetrates through the top packer and extends into the sand prevention section of the oil layer.
2. The jet pump lifting process string for the offshore oilfield multi-turn acidizing according to claim 1, wherein the outer casing is stepped; a plurality of signal transmission cables are arranged below the flange plate of the outer sleeve; one end of the signal transmission cable is connected with the deep well safety valve; the other end is connected with the deep well safety valve through a pipeline protection short joint.
3. The jet-pumped lifting process string capable of being repeatedly acidized for the offshore oilfield according to the claim 1, wherein a hydraulic anchor is further arranged in the annular space between the production oil pipe and the production casing pipe, and the hydraulic anchor is arranged below the sand-blocking leather cup; the hydraulic anchor can effectively avoid power fluid, and under a long-term high-pressure working condition, the pipe column is axially displaced and anchored; the sand blocking leather cup can effectively block sand during production, and prevent a production packer from being buried by sand.
4. The jet pump lifting process pipe column capable of being repeatedly acidized in the offshore oilfield according to the claim 1, wherein after the hydraulic throwing and fishing jet pump is lowered into a preset position, the hydraulic throwing and fishing jet pump is seated in an acidizing isolation sleeve through a sealing end face and is lifted out to a wellhead catcher; and the space between the upper end of the hydraulic throwing and fishing jet pump and the production oil pipe is as follows: the high-pressure power fluid channel is arranged in the space of the production oil pipe at the lower end of the hydraulic throwing and fishing jet pump: the stratum produces a hydraulic channel, and an annular channel between the production casing and the production oil pipe is a mixed produced fluid channel.
5. The jet pump lifting process string capable of being repeatedly acidized in the offshore oilfield according to the claim 1, wherein the acidizing isolation sleeve can be closed by putting the isolation jet pump into the acidizing isolation sleeve, and the acidizing isolation sleeve has a function of acidizing the oil pipe.
6. The jet pump lifting process pipe column capable of being repeatedly acidized in the offshore oilfield according to the claim 1, wherein the multistage ball seat is provided as a three-stage ball seat and is set by ball throwing, an overflowing channel can be formed by pressing a shearing pin, and the size of the ball seat is gradually increased from bottom to top.
7. The jet pump lifting process pipe string capable of being repeatedly acidized in the offshore oilfield according to the claim 1, wherein the temperature and pressure measuring device is a downhole pressure gauge capable of simultaneously monitoring the injection temperature and pressure of the power fluid in the oil casing annulus and the temperature and pressure of the produced fluid in the oil pipe so as to realize the online real-time monitoring of the production dynamic state of the oil well and the working state of the jet pump.
8. The jet pump lifting process pipe column capable of being repeatedly acidized in the offshore oilfield according to the claim 1, wherein a seal is arranged between the production packer and the production casing pipe, and the seal is made of fluororubber.
9. The jet pump lifting process pipe column capable of being repeatedly acidized in the offshore oilfield according to the claim 1 or 4, wherein a seal is arranged between the hydraulic throwing and fishing jet pump and the acidizing isolation sleeve, and the seal is made of fluororubber.
10. The jet pump lifting process pipe column capable of being repeatedly acidized in the offshore oilfield according to the claim 1, wherein a seal is arranged between the insert seal and the top packer, and the seals are made of fluororubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122180398.XU CN215672164U (en) | 2021-09-09 | 2021-09-09 | Jet pump lifting process pipe column capable of being repeatedly acidified in offshore oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122180398.XU CN215672164U (en) | 2021-09-09 | 2021-09-09 | Jet pump lifting process pipe column capable of being repeatedly acidified in offshore oil field |
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| CN215672164U true CN215672164U (en) | 2022-01-28 |
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| CN202122180398.XU Active CN215672164U (en) | 2021-09-09 | 2021-09-09 | Jet pump lifting process pipe column capable of being repeatedly acidified in offshore oil field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922608A (en) * | 2022-05-20 | 2022-08-19 | 中海油能源发展股份有限公司 | Positive circulation downhole jet flow separation pipe column and use method thereof |
| CN115059446A (en) * | 2022-05-20 | 2022-09-16 | 中海油能源发展股份有限公司 | Reverse circulation downhole jet flow separation pipe column and use method thereof |
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2021
- 2021-09-09 CN CN202122180398.XU patent/CN215672164U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922608A (en) * | 2022-05-20 | 2022-08-19 | 中海油能源发展股份有限公司 | Positive circulation downhole jet flow separation pipe column and use method thereof |
| CN115059446A (en) * | 2022-05-20 | 2022-09-16 | 中海油能源发展股份有限公司 | Reverse circulation downhole jet flow separation pipe column and use method thereof |
| CN115059446B (en) * | 2022-05-20 | 2023-10-31 | 中海油能源发展股份有限公司 | Reverse circulation underground jet flow separation tubular column and use method thereof |
| CN114922608B (en) * | 2022-05-20 | 2023-10-31 | 中海油能源发展股份有限公司 | Positive circulation underground jet flow separation tubular column and use method thereof |
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