Ball-type oil well pump and its use

Abstract

The present invention relates to the technical field of oil extraction, and is a ball-pitch oil pump and a method for using the ball-pitch oil pump. The ball-pitch oil pump comprises a shell, wherein the shell has an upper connecting piece and a lower connecting piece, an oil delivery channel which passes through the shell from top to bottom, a shoulder for placing a fixed valve ball, and a valve ball which can be placed on the shoulder in the shell, wherein the valve ball is placed on the shoulder to form a structure in which the oil delivery channel does not leak up and down, and the pump is characterized in that: the oil delivery channel on the shoulder is a channel which can accommodate the falling of the valve ball; a downward-flipping baffle is also installed on the inner side of the shell, wherein the downward-flipping baffle is arranged on the upper side of the shoulder, and a jumping cavity for fixing the valve ball is formed between the downward-flipping baffle and the shoulder; the pump has the advantages of being able to both flush sand and pump oil.

Description

Technical Field

[0001] The invention relates to the technical field of oil extraction, in particular to an oil well pump and a use method thereof. Background Art

[0002] The oil pump comprises a shell, in which a valve ball is installed, and the shell has an upper connecting piece on the top and a lower connecting piece on the bottom.

[0003] When in use, the upper connecting piece is connected to the pump pipe, a casing is placed in the oil well, and an oil pump connected to the pump pipe is placed in the casing, so that the oil in the oil well can be sucked.

[0004] In the prior art, the valve ball is housed inside the housing, and the valve ball and the housing are in an integrated state before use. Such an oil pump cannot complete the sand cleaning operation.

[0005] When inspecting the pump of a sand-producing oil well in an oil field, it is necessary to first lower the sand flushing string to clean the sand, then remove the sand flushing string, and then lower the production string with a conventional oil pump connected to the lower end to carry out production, resulting in a long pump inspection cycle and high construction costs. Summary of the invention

[0006] The present invention aims at the above disadvantages and provides a ball-dropping oil pump which can both clean sand and pump oil, so as to achieve the purpose of short pump inspection cycle and low construction cost. A method for using the ball-dropping oil pump is also provided.

[0007] The technical solution of the ball-pitch oil pump of the present invention is achieved as follows: the ball-pitch oil pump includes a shell, the shell has an upper connecting piece and a lower connecting piece, an oil delivery channel that runs through the shell from top to bottom, a shoulder for placing a fixed valve ball, and a valve ball that can be placed on the shoulder in the shell, the valve ball is placed on the shoulder to form a structure in which the oil delivery channel does not leak up and down, and its characteristic is that the oil delivery channel on the shoulder is a channel that can accommodate the falling of the valve ball.

[0008] Furthermore, a downward-flipping baffle is also installed on the inner side of the shell, and the downward-flipping baffle is arranged on the upper side of the shoulder, and a jumping cavity for fixing the valve ball is formed between the downward-flipping baffle and the shoulder.

[0009] Furthermore, the downward-flipping baffle is installed on the inner side of the shell through a torsion spring.

[0010] Furthermore, there is a sand settling gap below the oil transfer channel and around the shoulder. The sand settling gap is a ring structure in the cross section of the shoulder. There is an opening below the sand settling gap, and a baffle is installed at the opening. The baffle is connected to an electric switch, and the electric switch is connected to a battery. The electric switch can control the opening or closing of the baffle to the opening.

[0011] Furthermore, the electric switch is installed in the sand settling gap. The electric switch is a sensing switch or a travel switch. When the sensing switch or the travel switch detects that the sand settling gap is full of sand, the baffle can be opened to the opening.

[0012] Furthermore, a vibration device is installed in the middle of the sand settling gap, and the vibration device is connected to an electric switch.

[0013] Furthermore, there are multiple openings, and the multiple openings are arranged around the shell; there are sliding grooves around the openings that can slide up and down, and the baffle is an annular structure and is installed in the sliding groove.

[0014] Furthermore, it also includes a flushing pipe, which is opened above the sand settling gap and is connected to an electric switch. When the baffle is opened, the flushing pipe starts flushing.

[0015] Furthermore, there is a widened expansion cavity below the sand settling gap.

[0016] Furthermore, the bottom surface of the expansion chamber is a sloped structure with a lower outside.

[0017] The technical solution of the method for using the ball-throwing oil pump of the present invention is achieved as follows: the method for using the ball-throwing oil pump is to connect the oil pipe with the oil pipe without placing a valve ball in the oil pipe, and the oil pipe is lowered into the downhole casing along with the oil pipe string, so that the oil pipe string is connected with the downhole. If sand cleaning is required at the bottom of the well, the oil pipe string is directly used for positive washing operation. After the sand cleaning is completed, the valve ball is put in, and the valve ball falls on the shoulder to form a complete oil pump, and then oil pumping can be carried out.

[0018] The beneficial effects of the present invention are as follows: such a ball-dropping oil pump has the advantages of both sand removal and oil extraction, short pump inspection cycle and low construction cost; and can automatically remove sand with good sand removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the oil well pump body of the present invention.

[0020] Among them: 1, shell 2, upper connecting part 3, lower connecting part 4, oil delivery channel 5, shoulder 6, valve ball 7, downward baffle 8, jumping chamber 9, torsion spring 10, sand settling gap 101, expansion chamber 102, inclined structure 11, opening 12, baffle 13, vibration device 14, chute 15, flushing pipe 16, battery 17, blade 18, sealing ring. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, a ball-dropping oil pump comprises a housing 1, wherein the housing has an upper connecting piece 2 and a lower connecting piece 3, an oil delivery channel 4 which passes through the housing from top to bottom, a shoulder 5 for placing a fixed valve ball, and a valve ball 6 which can be placed on the shoulder, wherein the valve ball is placed on the shoulder to form a structure in which the oil delivery channel does not leak up and down, and the feature of the structure is that the oil delivery channel on the shoulder can accommodate the falling of the valve ball.

[0023] Generally speaking, the oil well needs to be cleaned of sand before pumping oil. In the prior art, it is first necessary to lower a sand flushing string to clean the sand, then pull out the sand flushing string after the sand cleaning is completed, and then lower the oil production string with a conventional oil pump connected to the lower end to pump oil. The whole process requires two pipeline placements, the process is cumbersome, the operation time is long, and the production cost is increased.

[0024] When using the oil pump, there is no need to use a sand flushing pipe. The oil pump connected to the oil pump pipe and without a valve ball can be directly placed in the casing, and the sand can be cleaned using the oil pump pipe. After the sand cleaning is completed, the valve ball is dropped into the shoulder of the oil pump. Since the oil delivery channel on the shoulder is a channel that can accommodate the falling of the valve ball, it can be ensured that the valve ball is smoothly dropped onto the shoulder. In this way, the oil pump forms a complete oil pump and can be used to pump oil. The whole process is simple and the time taken is short, which can achieve the purpose of the present invention.

[0025] Furthermore, a downward-flipping baffle 7 is installed on the inner side of the shell. The downward-flipping baffle is arranged on the upper side of the shoulder, and a jumping cavity 8 for fixing the valve ball is formed between the downward-flipping baffle and the shoulder.

[0026] The present invention is configured in this way, which can ensure the smooth pitching and a certain jumping distance of the valve ball. The falling process of the valve ball will not take too long, thereby reducing the reflux of oil and improving the oil pumping efficiency.

[0027] Furthermore, the downward baffle is installed on the inner side of the shell through a torsion spring 9.

[0028] The direction of arrow F in the figure is the direction in which the lower flip baffle flips.

[0029] Furthermore, there is a sand settling gap 10 below the oil transfer channel and around the shoulder. The sand settling gap is a ring structure in the cross section of the shoulder. There is an opening 11 below the sand settling gap, and a baffle 12 is installed at the opening. The baffle is connected to an electric switch, and the electric switch is connected to a battery 16. The electric switch can control the opening or closing of the baffle to the opening.

[0030] The direction of arrow K in the figure is the direction in which the damper closes the opening.

[0031] The electric switch can control the opening or closing of the baffle to the opening and can use components in the prior art, such as a push-pull plate, an electromagnetic valve, etc., which can be realized by those skilled in the art.

[0032] The present invention is arranged in this way, after a period of time, some sand will be deposited in the sand settling gap, and the electric switch can be turned on to open the baffle at the opening to release and clean the sand; if these components are not provided, the sand will be on the shoulder or under the valve ball, affecting the use effect of the valve ball.

[0033] Furthermore, the electric switch is installed in the sand settling gap. The electric switch is a sensing switch or a travel switch. When the sensing switch or the travel switch detects that the sand settling gap is full of sand, the baffle can be opened to the opening.

[0034] This arrangement of the device has the advantage of a higher degree of automation.

[0035] For example, when there are a lot of sand particles in the sand settling gap, the sand particles will touch the travel switch, and the travel switch will automatically open the opening to discharge the sand.

[0036] Furthermore, a vibration device 13 is installed in the middle of the sand settling gap, and the vibration device is connected to an electric switch.

[0037] The device is arranged in this way, so that the vibration device can be started when the accumulated sand is discharged, and the vibration device helps to discharge the accumulated sand; in addition, turning on the vibration device can also achieve shaking off the iron filings on the valve ball.

[0038] Furthermore, there are multiple openings, and the multiple openings are arranged around the shell; there is a slide groove 14 around the opening that can slide up and down, and the baffle is an annular structure and is installed in the slide groove.

[0039] This has the advantage of faster sand discharge.

[0040] Furthermore, it also includes a flushing pipe 15, which is opened above the sand settling gap and is connected to an electric switch. When the baffle is opened, the flushing pipe starts flushing.

[0041] An electric valve or a water supply pump is installed in the middle of the flushing pipe, and the electric switch controls the flushing of the flushing pipe.

[0042] The baffle, the vibrating device and the flushing pipe are connected to a common electric switch, which can ensure that the baffle is opened, the water is flushed and the vibration is carried out at the same time, and the sand cleaning effect is better.

[0043] Furthermore, there is a widened expansion cavity 101 below the sand settling gap.

[0044] Furthermore, the bottom surface of the expansion chamber is a slope structure 102 which is lower on the outside.

[0045] The device is arranged in this way, which has the advantage of discharging accumulated sand more smoothly.

[0046] Furthermore, the baffle plate also has a lower blade portion 17.

[0047] The baffle plate also has a lower blade portion which can clean sand grains on the chute when the baffle plate is closed, thereby ensuring that the baffle plate is tightly closed at the opening.

[0048] Furthermore, there is a sealing ring 18 between the baffle and the slide groove, and the sealing ring is below the opening.

[0049] The technical solution of the method for using the ball-throwing oil pump of the present invention is achieved as follows: the method for using the ball-throwing oil pump is to connect the oil pipe with the oil pipe without placing a valve ball in the oil pipe, and the oil pipe is lowered into the downhole casing along with the oil pipe string, so that the oil pipe string is connected with the downhole. If sand cleaning is required at the bottom of the well, the oil pipe string is directly used for positive washing operation. After the sand cleaning is completed, the valve ball is put in, and the valve ball falls on the shoulder to form a complete oil pump, and then oil pumping can be carried out.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the specification of the present invention.

Claims

1. A ball-dropping oil pump, comprising a housing, wherein the housing has an upper connecting piece and a lower connecting piece, and an oil delivery channel extending vertically in the middle of the housing. A shoulder for placing a fixed valve ball is provided in the housing, and a valve ball can be placed on the shoulder. The valve ball is placed on the shoulder to form a structure in which the oil delivery channel does not leak up and down, and the characteristics are: The oil delivery channel on the shoulder is a channel that can accommodate the valve ball to fall; There is a sand settling gap below the oil delivery channel and around the shoulder. The cross section of the sand settling gap at the shoulder is an annular structure. There is an opening below the sand settling gap. There is also a baffle installed at the opening. The baffle is connected to an electric switch, which is connected to a battery. The electric switch can control the opening or closing of the baffle to the opening. The electric switch is installed in the sand settling gap. The electric switch is a sensing switch or a travel switch. When the sensing switch or the travel switch detects that the sand settling gap is full of sand, the baffle can be opened to the opening. A vibration device is also installed in the middle of the sand settling gap, and the vibration device is connected to an electric switch; It also includes a flushing pipe, which is opened above the sand settling gap and connected to an electric switch. When the baffle is opened, the flushing pipe starts flushing. A widened expansion cavity is provided below the sand settling gap, and the bottom surface of the expansion cavity is a slope structure with a lower outer surface.

2. The ball-pitch oil pump according to claim 1 is characterized in that: A downward-flipping baffle is also installed on the inner side of the shell, and the downward-flipping baffle is arranged on the upper side of the shoulder, and a jumping cavity for fixing the valve ball is formed between the downward-flipping baffle and the shoulder.

3. The ball-pitch oil pump according to claim 2 is characterized in that: The downward-flipping baffle is installed on the inner side of the shell through a torsion spring.

4. The ball-pitch oil pump according to claim 3 is characterized in that: There are multiple openings, which are arranged around the shell; there are sliding grooves around the openings that can slide up and down, and the baffle is an annular structure and is installed in the sliding groove.

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