CN210530785U - Bailing pipe column - Google Patents
Bailing pipe column Download PDFInfo
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- CN210530785U CN210530785U CN201921151069.9U CN201921151069U CN210530785U CN 210530785 U CN210530785 U CN 210530785U CN 201921151069 U CN201921151069 U CN 201921151069U CN 210530785 U CN210530785 U CN 210530785U
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- bailing
- sand setting
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Abstract
The utility model discloses a bailing tubular column that oil industry used, this tubular column include suction pump, drilling rod and sand washing nib, and suction pump top-down loops through the drilling rod and is connected with cyclone tube, sand setting pipe and sand washing nib, is equipped with the sand setting chamber among the sand setting pipe wherein, is equipped with the whirl passageway in the cyclone tube, and the sand setting pipe connects one at least in the bailing tubular column. When a sand washing pen point in the bailing pipe column contacts a sand surface, a pump is started on the ground to wash sand in a positive circulation mode; and at the moment, counting the descending drill pipe, and stopping pumping on the ground for sand setting when the volume of the descending drill pipe for sand washing is consistent with the volume of the sand setting cavity in one or more sand setting pipes connected in the bailing pipe column. The sand washing amount of the sand washing well section can be calculated according to the depth of the sand washing well section, so that the sand setting amount of a sand setting pipe connected in the bailing pipe column is equal to the sand washing amount. The utility model discloses showing and improving the sand removal effect, shortening construction cycle, realized the purpose of effective sand washing, effectively reduced the operating cost.
Description
Technical Field
The utility model relates to a bailing device of oil industry workover, especially a bailing tubular column.
Background
In the oil industry well repair operation, due to stratum reasons or mining reasons, sand production in an oil well is a common phenomenon and an important factor influencing continuous production of the oil well, so that sand cleaning and sand bailing in the oil well operation are very common operation forms and means of the well repair operation. In order to effectively carry out sand cleaning and bailing operation of an oil well, a plurality of methods are used at present, however, the methods have the defects, and the defects of various sand cleaning and bailing methods are described in detail as follows: (1) sand washing of the smooth oil pipe: the sand washing method has the defects of high sand washing efficiency and poor sand carrying and returning capacity. (2) Sand back flushing of the smooth oil pipe: the method has the defects of strong sand carrying capacity and weak sand washing capacity. (3) The venturi basket has the defects of strong adsorption capacity, less fishing amount and incapability of stopping pumping for fishing halfway. (4) The local reverse circulation fishing basket can be used for sand cleaning and sand fishing, but has the defect of small sand fishing amount. (5) The steel wire rope sand cleaning and bailing are simple to operate, but the sand bailing amount is small.
The above sand cleaning and bailing methods all have certain disadvantages, and in the sand cleaning and bailing of ultra-deep wells, the required power requirement of pump power equipment is particularly high due to the well depth: when the smooth oil pipe is used for sand washing, no matter positive sand washing or reverse sand washing, when sand particles washed up in the well are large, the sand particles are precipitated, and sand in the well cannot be effectively fished up. And when using venturi junk basket, local reverse circulation junk basket and wire rope sand removal, bailing, the ubiquitous problem of bailing inefficiency, consequently, all above methods all have the problem that can not high-efficient bailing, all have bailing inefficiency, the shortcoming that wastes time and energy, have reduced the efficiency of workover construction, are unfavorable for high-efficient operation, have increased the workover cost.
Disclosure of Invention
The utility model aims at providing a bailing tubular column in order to improve the sand removal efficiency of bailing well effectively, improves sand removal, the volume of bailing, improves the operating efficiency of sand removal bailing, shortens construction cycle, reduces the operating cost.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a bailing pipe column comprises a suction pump, a drill rod and a sand washing pen point, wherein the suction pump is connected with a rotational flow pipe, a sand setting pipe and the sand washing pen point sequentially from top to bottom through the drill rod, a sand setting cavity is formed in the sand setting pipe, a rotational flow channel is formed in the rotational flow pipe, and at least one sand setting pipe is connected in the bailing pipe column.
The sand setting pipe is provided with an outer pipe, an inner pipe support wing, an inner pipe and a sand blocking seat, the sand blocking seat is provided with a special-shaped central hole, the lower part of the inner pipe is connected with the special-shaped central hole of the sand blocking seat, the inner pipe and the sand blocking seat are both arranged in the outer pipe to form a sand setting cavity, and the outer pipe is connected with the inner pipe through the inner pipe support wing.
The upper end of the outer pipe is provided with internal threads, and the lower end of the outer pipe is provided with internal threads and external threads; the upper inner diameter and the lower outer diameter of the outer pipe conform to the outer diameter of the drill rod and the inner diameter of the sand washing pen point.
The volume of the sand setting cavity in the sand setting pipe is consistent with the volume of the drill rod or a calculation relation exists between the volume of the sand setting cavity in the sand setting pipe and the volume of the drill rod.
The special-shaped center hole of the sand blocking seat in the sand setting pipe is provided with a straight hole section and an inclined hole section, the straight hole section is connected with the inner pipe, and the lower end outlet of the inclined hole section is inclined to one side of the body of the sand blocking seat and does not correspond to the inner pipe.
The cyclone tube is provided with a central cyclone nipple and a buffer cup, an upper cup body of the buffer cup is provided with an upper cyclone channel, the buffer cup is arranged between the central cyclone nipple and a cyclone tube body, an upper cyclone cavity and an inner cyclone cavity are formed in the cyclone tube, and the upper cyclone channel, the upper cyclone cavity, the inner cyclone cavity and an upper cyclone channel formed by the central cyclone nipple and the upper cyclone tube joint form a cyclone channel of the cyclone tube.
The upper opening edges of the central rotational flow nipple and the buffer cup are connected with the rotational flow pipe body of the rotational flow pipe, and the lower cup body of the buffer cup is funnel-shaped and closed at the bottom.
The running depth of the suction pump in the bailing well is set to be below 50 meters of the working fluid level.
The utility model discloses a show the result of use and be: the utility model discloses connect suction pump, cyclone tube and sand setting pipe in a tubular column, because whole bailing tubular column sinks below the well working fluid level of bailing, after the pump washing sand is opened on the ground, the washing sand liquid forms the negative pressure in the choke passageway of suction pump, through outer tube and washing sand nib in the tubular column, plays the effect to the gravel of shaft bottom suction that makes progress. The sand washing liquid returning from the bottom of the well becomes the sand carrying liquid, and the sand carrying liquid can make the gravel settle in the sand setting cavity of the sand setting pipe through the blocking of the sand blocking seat special-shaped central hole in the sand setting pipe to the gravel in the returning process. Use the utility model discloses can calculate according to the length of bailing sand removal well section and drag for the sand volume to according to the volume of dragging for sand volume and the sand setting pipe of calculation, the quantity of the sand setting pipe of deciding to connect in the bailing tubular column, its bailing volume is big and the bailing operation method is simple.
The operation method is simply shown as follows: in the using process, the sand washing amount of the sand washing well section can be calculated according to the depth of the sand washing well section, so that the sand setting amount of the sand setting pipe connected in the bailing pipe column is equal to the sand washing amount of the sand washing well section. Because the volume of the sand setting cavity in the sand setting pipe and the volume of the drill rod have a calculation relation, the sand setting amount in the sand setting pipe can be pre-judged according to the number of the drill rods which are put into the sand setting pipe after sand washing, the pump is stopped intermittently, sand washing is performed intermittently until the sand setting pipe is filled with gravel, and the bailing pipe column and the bailing are lifted out of the ground. Therefore, the bailing pipe column not only effectively improves the bailing efficiency, but also avoids the difficult problems that gravel is precipitated and is difficult to return to a well mouth when the ultra-deep well is cleaned and bailed, and can effectively clean sand out of an ultra-deep well section. The utility model discloses showing and improving the sand removal effect, having shortened construction cycle, realized the purpose of effective sand washing, effectively reduced the operating cost, fine economic benefits and social have.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure in the direction of a-a in fig. 1.
Fig. 3 is a schematic view of the structure of the suction pump.
FIG. 4 is a schematic view of the cyclone tube.
Fig. 5 is a schematic flow diagram of the middle sand washing liquid and the sand carrying liquid of the present invention.
Detailed Description
The following detailed description of the present invention with reference to the drawings is not intended to limit the scope of the present invention, and all the modifications of the present invention belong to the protection category.
Referring to fig. 1 to 5, a bailing pipe column comprises a suction pump 2, a drill rod 4 and a sand washing pen point 9, wherein the suction pump 2 is connected with a cyclone tube 3, a sand setting tube and the sand washing pen point 9 sequentially through the drill rod 4 from top to bottom, a sand setting cavity is arranged in the sand setting tube, a cyclone channel is arranged in the cyclone tube 3, and at least one sand setting tube is connected in the bailing pipe column. Two ends of the suction pump 2 are provided with a suction pump upper joint 2-1 and a suction pump lower joint 2-2 which can be connected with a fishing drill column and a cyclone pipe 3. The suction pump 2 is internally provided with a nozzle 2-3, a cavity is separated by a throat 2-4 below the nozzle 2-3 to form an upper suction channel 2-5, and a lateral nozzle 2-6 is arranged at the lower part of the throat 2-4 and is communicated with the oil sleeve annulus. The sand washing liquid which is pumped in by the pump on the ground enters from the nozzle 2-3, flows to the oil sleeve annulus through the throat pipe 2-4 and the lateral nozzle 2-6 and reaches the well bottom, and washes the well bottom gravel 10; meanwhile, the sand washing liquid forms negative pressure in the nozzle 2-3 and the throat 2-4 to suck the liquid in the upper suction channel 2-5, and the upper suction channel 2-5 is communicated with the inner cavities of the cyclone tube 3, the drill rod 4, the sand setting tube and the sand washing pen point 9, so that the sand is adsorbed near the sand washing pen point 9, and the sand washing effect of external sand washing and internal suction is achieved. The sand washing liquid which returns upwards carries gravel to become sand carrying liquid, and the sand washing liquid returns upwards to the ground after sand settling through the sand settling pipe from the sand washing pen point 9 and further buffering the sand settling through the rotational flow channel of the rotational flow pipe 3.
The sand setting pipe is provided with an outer pipe 5, an inner pipe support wing 6, an inner pipe 7 and a sand blocking seat 8, the sand blocking seat 8 is provided with a special-shaped central hole, the lower part of the inner pipe 7 is connected with the special-shaped central hole of the sand blocking seat 8, the inner pipe 7 and the sand blocking seat 8 are both installed in the outer pipe 5 to form a sand setting cavity, and the outer pipe 5 is connected with the inner pipe 7 through the inner pipe support wing 6. The inner tube support wings 6 both support the inner tube 7 in the outer tube 5 and leave a sink channel for the gravel.
The upper end of the outer tube 5 is provided with internal threads, and the lower end of the outer tube is provided with internal threads and external threads.
The volume of the sand chamber in the sand trap corresponds to the volume of the drill rod 4 or a calculated relationship exists between the volume of the sand chamber in the sand trap and the volume of the drill rod 4. That is to say: the volume of the sand chamber in the sand trap is a multiple, fraction, or a multiple and fraction relationship to the volume of the drill pipe 4, such as: the volume of the sand setting chamber is 4/5, 2, 2.5 times the volume of the drill pipe 4, and the like. The total volume of the sand washing depth in the well is equal to the total volume of the sand settling cavity of the sand settling pipe which is put into the well, namely the total volume of the sand washing and putting into the drill pipe. Thus, after the sand washing depth in a certain well casing is known, the number of drill rods required to be put into the well casing for sand washing can be calculated, and similarly, the number of sand setting pipes required to be put into the well casing can also be calculated.
The special-shaped center hole of the sand blocking seat 8 in the sand setting pipe is provided with a straight hole section and an inclined hole section, the straight hole section is connected with the inner pipe 7, and the lower end outlet of the inclined hole section is inclined to one side of the body of the sand blocking seat 8 and does not correspond to the inner pipe 7.
The cyclone tube 3 is provided with a central cyclone short section 3-2 and a buffer cup 3-7, an upper cup body of the buffer cup 3-7 is provided with an upper cyclone channel 3-4, the buffer cup 3-7 is arranged between the central cyclone short section 3-2 and a cyclone tube body, an upper cyclone cavity 3-5 and an inner cyclone cavity 3-6 are formed in the cyclone tube 3, and the upper cyclone channel 3-4, the upper cyclone cavity 3-5, the inner cyclone cavity 3-6, the central cyclone short section 3-2 and the cyclone tube upper joint 3-1 form a cyclone channel of the cyclone tube 3.
The upper opening edges of the central rotational flow nipple 3-2 and the buffer cup 3-7 are connected with the rotational flow pipe body of the rotational flow pipe 3, and the lower cup body of the buffer cup 3-7 is funnel-shaped, the bottom of the buffer cup is closed, and enough sand settling space is reserved. The central cyclone short section 3-2 and the buffer cup 3-7 form a cyclone channel, so that the sand carrying liquid can rotate in the cyclone channel, and after the sand carrying liquid is buffered, gravel in the sand carrying liquid is deposited in the buffer cup 3-7, so that the sand carrying liquid can be further purified.
The depth of the suction pump 2 in the bailing well is set below 50 m.
A bailing operation method for a bailing pipe column comprises the following steps:
A. firstly, calculating the sand bailing amount according to the depth of a sand washing well section, and calculating the number of sand setting pipes needing to be lowered according to the sand bailing amount;
B. connecting a salvaging drill string 1 with a suction pump 2 in a bailing pipe column and putting the salvaging drill string into a well to ensure that the suction pump 2 is put below the working fluid level of the bailing well by 50 meters;
C. lowering the bailing pipe column to the designed bailing depth;
D. when a sand washing pen point 9 in the bailing pipe column contacts the sand surface, a pump is started on the ground to wash sand in a positive circulation mode; at the moment, the number of the drill rods 4 which are put in is counted, and when the volume of the drill rods 4 which are put in and washed out of the sand is consistent with the volume of the sand setting cavity in one or more sand setting pipes connected in the bailing pipe column, the pump is stopped on the ground for sand setting;
E. calculating the sedimentation velocity of the bottom gravel 10 by using a free sedimentation velocity meter of gravels with different densities in water (oil), calculating the sand settling time length according to the sand washing depth in the well, determining the pump stopping time of the ground, then starting the pump on the ground to wash sand, and stopping the pump and washing sand intermittently; the purpose of intermittent pump stopping and intermittent sand washing is to deposit washed sand in a sand setting pipe in a bailing pipe column. The 'free settling velocity table of gravels with different densities in water (oil)' is from the publishing company of petroleum industry, Wu Shi Yi (institute of workover engineering), chapter II, fourth section 'Sand cleaning and prevention' 43 th page tables 2-4 and 2-5.
And the intermittent pump stopping and the intermittent sand flushing are performed alternately, the alternating times of sand flushing and sand setting are calculated according to the volume of the sand setting pipe until the sand setting pipe in the bailing pipe column is fully settled, and finally the drill is taken out to the ground.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention.
Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.
Claims (8)
1. The utility model provides a bailing tubular column, includes suction pump (2), drilling rod (4) and sand washing nib (9), characterized by, and suction pump (2) top-down loops through drilling rod (4) and is connected with cyclone tube (3), sand setting pipe and sand washing nib (9), is equipped with the sand setting chamber in the sand setting pipe wherein, is equipped with the whirl passageway in cyclone tube (3), and the sand setting pipe connects one at least in bailing tubular column.
2. The bailing pipe column according to claim 1, wherein the sand setting pipe is provided with an outer pipe (5), an inner pipe support wing (6), an inner pipe (7) and a sand blocking seat (8), the sand blocking seat (8) is provided with a special-shaped central hole, the lower part of the inner pipe (7) is connected with the special-shaped central hole of the sand blocking seat (8), the inner pipe (7) and the sand blocking seat (8) are both arranged in the outer pipe (5) to form a sand setting cavity, and the outer pipe (5) is connected with the inner pipe (7) through the inner pipe support wing (6).
3. A bailing string according to claim 2, characterized in that the outer tube (5) is provided with an internal thread at its upper end and an internal and external thread at its lower end.
4. A bailing string according to claim 3, characterized in that the volume of the sand chamber in the sand sediment tube corresponds to the volume of the drill pipe (4).
5. A bailing pipe string as claimed in claim 4, wherein the shaped center hole of the sand stopper (8) in the sand setting pipe is provided with a straight hole section and an inclined hole section, the straight hole section is connected with the inner pipe (7), and the lower end outlet of the inclined hole section is inclined to one side of the body of the sand stopper (8) and is not corresponding to the inner pipe (7).
6. The bailing pipe column according to claim 1, wherein the cyclone tube (3) is provided with a central cyclone nipple (3-2) and a buffer cup (3-7), an upper cup body of the buffer cup (3-7) is provided with an upper cyclone channel (3-4), the buffer cup (3-7) is arranged between the central cyclone nipple (3-2) and a cyclone tube body, an upper cyclone cavity (3-5) and an inner cyclone cavity (3-6) are formed in the cyclone tube (3), and the upper cyclone channel (3-4), the upper cyclone cavity (3-5), the inner cyclone cavity (3-6) and the upper cyclone channel (3-3) formed by the central cyclone nipple (3-2) and the upper cyclone tube joint (3-1) jointly form a cyclone channel of the cyclone tube (3).
7. The bailing pipe column as claimed in claim 6, wherein the upper opening edges of the central cyclone nipple (3-2) and the buffer cup (3-7) are connected with the cyclone pipe body of the cyclone pipe (3), and the lower cup body of the buffer cup (3-7) is funnel-shaped and closed at the bottom.
8. A bailing string according to claim 1, characterized in that the depth of the suction pump (2) run into the bailing well is set below 50 meters of the dynamic liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921151069.9U CN210530785U (en) | 2019-07-22 | 2019-07-22 | Bailing pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921151069.9U CN210530785U (en) | 2019-07-22 | 2019-07-22 | Bailing pipe column |
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| Publication Number | Publication Date |
|---|---|
| CN210530785U true CN210530785U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921151069.9U Active CN210530785U (en) | 2019-07-22 | 2019-07-22 | Bailing pipe column |
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| CN (1) | CN210530785U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374535A (en) * | 2019-07-22 | 2019-10-25 | 中石化石油工程技术服务有限公司 | A kind of fishing sandpipe column and its fishing sand operational method |
| CN117846528A (en) * | 2024-03-07 | 2024-04-09 | 太原理工大学 | Spiral-flow type continuous sand fishing device for geothermal drilling in water-rich stratum |
-
2019
- 2019-07-22 CN CN201921151069.9U patent/CN210530785U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374535A (en) * | 2019-07-22 | 2019-10-25 | 中石化石油工程技术服务有限公司 | A kind of fishing sandpipe column and its fishing sand operational method |
| CN110374535B (en) * | 2019-07-22 | 2024-02-06 | 中石化石油工程技术服务有限公司 | Sand bailing pipe column and sand bailing operation method thereof |
| CN117846528A (en) * | 2024-03-07 | 2024-04-09 | 太原理工大学 | Spiral-flow type continuous sand fishing device for geothermal drilling in water-rich stratum |
| CN117846528B (en) * | 2024-03-07 | 2024-06-11 | 太原理工大学 | Spiral-flow type continuous sand fishing device for geothermal drilling in water-rich stratum |
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