阅读说明：本技术 双通道换层试油抽汲装置 (Double-channel layer-changing oil testing swabbing device ) 是由 刘彦辉 徐伟 赵文红 夏雷 丁文峰 马朋举 刘长 于 2019-02-21 设计创作，主要内容包括：本发明公开了双通道换层试油抽汲装置,包括上泵、下泵、外筒、双通道分流接头,所述双通道分流接头开设不相互连通的两个通道,分别为第一通道和第二通道,所述外筒上端口连接在上泵的上泵筒下端口,所述下泵整体位于外筒内部,并且下泵的下泵筒与外筒之间构成环空通道,所述外筒上端、下泵的下柱塞上端均与上泵的上泵筒连通,所述下泵下端口连接双通道分流接头,并且只和双通道分流接头的第二通道连通,所述外筒下端口连接双通道分流接头,并且只和双通道分流接头的第一通道连通。本发明消除不动管柱换层试油技术中存在的不可靠的问题,减少换层试油的作业过程,提高油田的开发效益。(The invention discloses a double-channel layer-changing oil testing and swabbing device which comprises an upper pump, a lower pump, an outer cylinder and a double-channel shunt joint, wherein the double-channel shunt joint is provided with two channels which are not communicated with each other and respectively comprise a first channel and a second channel, an upper port of the outer cylinder is connected with a lower port of an upper pump cylinder of the upper pump, the lower pump is integrally positioned in the outer cylinder, an annular channel is formed between the lower pump cylinder of the lower pump and the outer cylinder, the upper end of the outer cylinder and the upper end of a lower plunger of the lower pump are both communicated with the upper pump cylinder of the upper pump, the lower port of the lower pump is connected with the double-channel shunt joint and is only communicated with the second channel of the double-channel shunt joint, and the lower port of the outer cylinder is connected with the double-channel. The invention eliminates the problem of unreliability in the layer-changing oil testing technology without moving a tubular column, reduces the operation process of layer-changing oil testing, and improves the development benefit of the oil field.)

1. The double-channel layer-changing oil testing swabbing device comprises an upper pump and a lower pump, wherein the upper pump comprises an upper pump cylinder and an upper plunger arranged in the upper pump cylinder, the lower pump comprises a lower pump cylinder and a lower plunger arranged in the lower pump cylinder, it is characterized by also comprising an outer cylinder and a double-channel shunt joint, wherein the double-channel shunt joint is provided with two channels which are not mutually communicated and respectively are a first channel and a second channel, the upper port of the outer cylinder is connected with the lower port of the upper pump cylinder of the upper pump, the lower pump is integrally positioned in the outer cylinder, an annular channel is formed between a lower pump cylinder of the lower pump and the outer cylinder, the upper end of the outer cylinder and the upper end of a lower plunger of the lower pump are both communicated with an upper pump cylinder of the upper pump, the lower port of the lower pump is connected with a double-channel flow dividing joint, and only communicate with the second passageway of binary channels reposition of redundant personnel joint, the port is connected binary channels reposition of redundant personnel joint under the urceolus to only communicate with the first passageway of binary channels reposition of redundant personnel joint.

2. The dual-channel layer-changing oil testing and swabbing device as claimed in claim 1, wherein the first channel comprises a side vertical channel and a lower port channel which are communicated with each other, wherein the upper end of the side vertical channel is communicated with the outer cylinder, and an upper pump oil inlet valve is installed in the lower port channel.

3. The dual-channel layer-changing oil testing and swabbing device as claimed in claim 1 or 2, wherein the second channel comprises a central hole and a lateral groove which are communicated with each other, the central hole is a blind hole drilled downwards from the upper end of the dual-channel flow dividing joint, the lateral groove is communicated with the central hole, so that the central hole is communicated with the outside of the dual-channel flow dividing joint, the upper end of the central hole is connected with a lower pump oil inlet valve, the upper end of the lower pump oil inlet valve is connected with a cut-off valve, and the upper end of the cut-off valve is connected with a lower pump barrel.

4. The dual-channel layer-changing oil testing and pumping device as claimed in claim 3, wherein a lower oil outlet valve is mounted on the upper port of the lower plunger, and an upper oil outlet valve is mounted on the upper port of the upper plunger.

5. The dual-channel layer-changing oil testing and pumping device as claimed in claim 3, wherein the lower port of the lower pump barrel is connected with a block valve through a limit joint.

6. The dual-channel layer-changing oil testing and swabbing device as claimed in claim 5, wherein a reducing limit ring table is arranged on the inner wall of the limit joint, the lower end of the lower plunger is connected with a stop joint, and the outer diameter of the stop joint is larger than the inner diameter of the limit ring table, namely, the upper end surface of the limit ring table axially limits the lower end surface of the stop joint.

7. The dual-channel layer-changing oil testing and swabbing device as claimed in claim 6, wherein the stopper joint has an upper end surface, the upper end surface is provided with an upper end surface central hole and at least one communicating hole, the lower plunger is internally provided with a pressure rod, the outer diameter of the pressure rod is smaller than the inner diameter of the lower plunger, the pressure rod slidably passes through the upper end surface central hole, and the lower end of the pressure rod corresponds to a valve ball of the block valve.

8. The dual-channel layer-changing oil-testing pumping device as claimed in claim 7, wherein a lifting joint is arranged at the upper end of the pressure rod, the outer diameter of the lifting joint is larger than the central hole of the upper end face of the blocking joint, and the distance between the lower end face of the lifting joint and the upper end face of the blocking joint after the lifting distance is over is larger than the moving stroke of the plunger in the lower pump barrel.

9. The dual-channel layer-changing oil testing and pumping device as claimed in claim 7 or 8, wherein the compression rod is further provided with a lower compression joint, the lower compression joint is located below the upper end face of the blocking joint, and the outer diameter of the lower compression joint is larger than the inner diameter of the central hole of the upper end face of the blocking joint.

Technical Field

The invention relates to equipment for oil extraction in an oil field, in particular to a double-channel layer-changing oil testing swabbing device.

Background

The oil well is perforated with a plurality of layers, and due to the difference between layers, each oil layer needs to be separated for oil extraction so as to eliminate the interference between layers. The main layered oil production method at present is to put a layered oil production pipe column, seal layers which are not produced, and communicate a layer to be produced with a shaft through the layered oil production pipe column, so that layered oil production is realized. Because the oil-gas migration and the judgment of the oil layer are inaccurate, and the injection-production scheme is adjusted, oil is required to be measured on the oil layer, and the oil outlet conditions of the two layers are found out and then the oil layer is changed to the layer with better oil outlet conditions. The aim is realized by using the prior layering tubing string to pull out all the layering oil production tubing strings, and then putting the production tubing string at another layer position for oil testing. The layer changing and oil testing method needs to be carried out on a working team, the time required by the oil testing and layer changing operation is long, the oil testing operation cost is high, and the oil well production stopping time is long.

In order to solve the problems, researchers develop a layer-changing oil testing technology of an immobile pipe column, the technology is that a layering switch is put in and out of the layering pipe column, a rail is arranged on the switch, a pin on the rail is switched to the position on the rail by pressing the switch on the ground, and the opening or closing of the layering switch is realized, so that the layer-changing oil testing of the immobile pipe column is realized. However, the layered switch in the layered oil testing string has low reliability, and is provided with a spring, a sliding sleeve and a sealing ring, and the layered switch is turned on or off depending on different pressures and different areas. Because the pressure of each layer is not predicted accurately, the elasticity of the spring is limited by the diameter of the shaft and cannot be designed to be large, and the problem that the track pin cannot be reversed due to the pushing of the spring often occurs, so that the layer changing fails; the method for testing oil in the layer changing manner also has the problems that sundries are easy to fall into the middle of the gap of the sliding sleeve, so that the sliding sleeve is blocked and cannot be switched on and off, and the oil testing in the layer changing manner fails; the layer changing oil testing method has the further problem that a sealing ring needs to be pressed through a pressure relief hole during opening and closing, so that the sealing ring is easily damaged, and the layer changing oil testing is also failed. The stratum-changing oil testing technology has the advantages that after stratum-changing failure, because multilayer mixed production occurs, oil extraction data can be changed, the ground cannot judge whether stratum-changing is successful, wrong judgment is brought to compiling and developing schemes, and great loss is brought to oil field development.

Application No.: 201711059216.5 relates to an injection-extraction two-channel oil extraction device and a use method thereof; the oil-gas-injection conversion mandrel barrel fishing head comprises a working barrel assembly, a plunger assembly, an oil-inlet gas-injection conversion mandrel barrel fishing head and a fishing sleeve; the working barrel assembly comprises a sealing working string, an upper supporting pipe, an outer pipe, a double-pipe coupling, a lower coupling and a lower supporting pipe; a plunger assembly is hermetically arranged in the upper part of the sealed working pipe column; the invention has reasonable and compact structure and convenient use; the oil extraction device respectively performs oil pumping and steam injection through the oil pumping channel and the steam injection ring cavity, so that the inner wall of the oil pumping channel can be prevented from scaling, the oil pumping channel is always kept smooth, accidents such as plunger assembly clamping and the like are avoided, and the service life of a sealed working pipe column is prolonged; and when the oil pumping and steam injection are switched, the operation is simple and convenient, the workload is reduced, the clamp is prevented from repeatedly engaging the surface of the polished rod, and the service life of the polished rod is prolonged.

Application No.: 201510998022.6 provides a double-acting oil pump used in oil field, which aims to: the problems of complex structure, multiple easily-damaged parts, high processing difficulty and short service life of the oil well pump of the large-displacement double-acting oil well pump are solved. The double-acting oil well pump consists of an upper pump, a lower pump and a middle sealing pair; the upper pump consists of an upper pump barrel and an upper plunger, and a traveling valve is arranged on the upper plunger; the lower pump consists of a lower pump cylinder and a lower plunger, and the bottom of the lower pump cylinder is provided with a fixed valve; the upper pump barrel is connected with the lower pump barrel through the middle sealing pair outer barrel, and the upper plunger is sequentially connected with the traveling valve, the sealing pair plunger and the lower plunger. Compared with other double-acting oil-well pumps, the invention has the advantages that: the universal quick-wear parts such as a bias valve and a cone valve are abandoned, all the valve parts adopt mature and reliable oil well pump standard parts, the reliability of the valve parts is improved, the flow channel is large, the liquid flow resistance is small, the pump efficiency is high, only two sets of valve pairs are needed in principle, the manufacturing cost is reduced, and the service life of the oil well pump is prolonged.

Disclosure of Invention

The invention aims to provide a double-channel layer-changing oil testing swabbing device, which solves the problem of unreliability in the layer-changing oil testing technology of an immobile pipe column, reduces the operation process of layer-changing oil testing and improves the development benefit of an oil field.

In order to achieve the purpose, the invention adopts the following technical scheme that the double-channel layer-changing oil testing and pumping device comprises an upper pump and a lower pump, wherein the upper pump comprises an upper pump barrel and an upper plunger arranged in the upper pump barrel, the lower pump comprises a lower pump barrel and a lower plunger arranged in the lower pump barrel, the double-channel oil testing and pumping device also comprises an outer barrel and a double-channel flow dividing joint, the double-channel flow dividing joint is provided with two channels which are not communicated with each other and are respectively a first channel and a second channel, an upper port of the outer barrel is connected with a lower port of the upper pump barrel of the upper pump, the lower pump is integrally positioned in the outer barrel, an annular channel is formed between the lower pump barrel of the lower pump and the outer barrel, the upper end of the outer barrel and the upper end of the lower plunger of the lower pump are both communicated with the upper pump barrel of the upper pump, a lower port of the lower pump is connected with the double-channel flow dividing joint and is only, and communicates only with the first channel of the dual channel tap.

The first channel comprises a side vertical flow channel and a lower port flow channel which are mutually communicated, wherein the upper end of the side vertical flow channel is communicated with the outer barrel, and an upper pump oil inlet valve is installed in the lower port flow channel.

The second passageway is including centre bore, the side direction groove of mutual intercommunication, the blind hole that the centre bore was established for boring downwards from binary channels reposition of redundant personnel joint's upper end, the side direction groove communicates with each other with the centre bore, makes the centre bore communicates with each other with binary channels reposition of redundant personnel joint's outside, and pump inlet valve under the centre bore upper end is connected, and the valve is cut off to pump inlet valve upper end connection down, and pump barrel under the cut off valve upper end connection.

The upper port of the lower plunger is provided with a lower oil outlet valve, and the upper port of the upper plunger is provided with an upper oil outlet valve.

And the lower port of the lower pump barrel is connected with a block valve through a limiting joint.

The limiting joint inner wall is provided with a reducing limiting ring platform, the lower end of the lower plunger is connected with a blocking joint, the outer diameter of the blocking joint is larger than the inner diameter of the limiting ring platform, and the upper end surface of the limiting ring platform is axially limited on the lower end surface of the blocking joint.

The stop joint is provided with an upper end face, a central hole of the upper end face and at least one communicating hole are formed in the upper end face, a pressing rod is arranged inside the lower plunger, the outer diameter of the pressing rod is smaller than the inner diameter of the lower plunger, the pressing rod penetrates through the central hole of the upper end face in a sliding mode, and the lower end of the pressing rod corresponds to a valve ball of the block valve.

The upper end of the compression bar is provided with a lifting joint, the outer diameter of the lifting joint is larger than the center hole of the upper end face of the blocking joint, and the distance between the lower end face of the lifting joint and the upper end face of the blocking joint is larger than the moving stroke of the plunger in the lower pump barrel after the lifting is finished and the impact distance is prevented.

The pressing rod is further provided with a downward pressing joint, the downward pressing joint is located below the upper end face of the blocking joint, and the outer diameter of the downward pressing joint is larger than the inner diameter of a center hole of the upper end face of the blocking joint.

Compared with the prior art, the invention has the following beneficial effects:

the invention has double channels, the upper pump consisting of the upper pump cylinder, the plunger, the oil outlet valve and the upper pump oil inlet valve pumps the lower layer oil through one channel, the lower pump cylinder consisting of the lower pump cylinder, the plunger, the oil outlet valve and the lower pump oil inlet valve pumps the upper layer oil through the other channel, when the upper layer oil is pumped and the lower layer oil is pumped, the oil inlet channel can be changed by only lifting the plunger to the upper pump cylinder, and the oil pumping and the oil testing of the layer changing of the immobile pipe column are realized.

Drawings

Fig. 1 is a schematic structural view of a dual-channel layer-changing oil testing pumping device according to the present invention.

The labels in the figure are: the device comprises an upper pump barrel 1, an oil outlet valve 2, a lower pump barrel 3, a plunger 4, a compression bar 5, a blocking joint 6, a block valve 7, an outer barrel 8, a lower pump oil inlet valve 9, a double-channel flow dividing joint 10, an upper pump oil inlet valve 11, a limiting joint 12, an upper lifting joint 5-1 and a lower pressing joint 5-2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the double-channel layer-changing oil testing swabbing device comprises an upper pump and a lower pump, wherein the upper pump comprises an upper pump cylinder 1 and an upper plunger arranged in the upper pump cylinder, the lower pump comprises a lower pump barrel 3, a lower plunger arranged in the lower pump barrel, an outer barrel 8 and a double-channel shunt joint 10, the double-channel flow-dividing joint is provided with two channels which are not communicated with each other and are respectively a first channel and a second channel, the upper port of the outer cylinder is connected with the lower port of the upper pump cylinder of the upper pump, the lower pump is integrally positioned in the outer cylinder, an annular channel is formed between a lower pump cylinder of the lower pump and the outer cylinder, the upper end of the outer cylinder and the upper end of a lower plunger of the lower pump are both communicated with an upper pump cylinder of the upper pump, a lower port of the lower pump cylinder 3 is connected with a double-channel flow dividing joint, and only communicate with the second passageway of binary channels reposition of redundant personnel joint, the port is connected binary channels reposition of redundant personnel joint under 8 urceolus to only communicate with the first passageway of binary channels reposition of redundant personnel joint.

The first channel comprises a side vertical flow passage 10-3 and a lower port flow passage which are communicated with each other, wherein the upper end of the side vertical flow passage is communicated with the outer barrel 8, and an upper pump oil inlet valve 11 is arranged in the lower port flow passage.

The second channel comprises a center hole 10-2 and a lateral groove 10-1 which are mutually communicated, the center hole is a blind hole drilled downwards from the upper end of the double-channel flow dividing joint, the lateral groove is communicated with the center hole to enable the center hole to be communicated with the outside of the double-channel flow dividing joint, the upper end of the center hole is connected with a lower pump oil inlet valve 9, the upper end of the lower pump oil inlet valve is connected with a stop valve 7, and the upper end of the stop valve is connected with a lower pump barrel 3.

The upper port of the lower plunger is provided with a lower oil outlet valve, and the upper port of the upper plunger is provided with an upper oil outlet valve. The drawings are not shown, but are conventional in the art.

The lower port of the lower pump cylinder is connected with a block valve through a limit joint 12.

The inner wall of the limit joint 12 is provided with a reducing limit ring platform, the lower end of the lower plunger is connected with a blocking joint 6, the outer diameter of the blocking joint is larger than the inner diameter of the limit ring platform, namely, the upper end surface of the limit ring platform is axially limited on the lower end surface of the blocking joint.

The stop joint 6 is provided with an upper end face, a central hole of the upper end face and at least one communicating hole are formed in the upper end face, a pressing rod 5 is arranged inside the lower plunger, the outer diameter of the pressing rod is smaller than the inner diameter of the lower plunger, the pressing rod penetrates through the central hole of the upper end face in a sliding mode, and the lower end of the pressing rod corresponds to a valve ball of the block valve.

The upper end of the compression bar is provided with an upward lifting joint 5-1, the outer diameter of the upward lifting joint is larger than the center hole of the upper end face of the blocking joint, and the distance between the lower end face of the upward lifting joint and the upper end face of the blocking joint is larger than the moving stroke of the plunger in the lower pump barrel after the upward lifting is finished and the impact distance is prevented.

The pressing rod is further provided with a downward pressing joint 5-2, the downward pressing joint is located below the upper end face of the blocking joint, and the outer diameter of the downward pressing joint is larger than the inner diameter of a center hole in the upper end face of the blocking joint.

Various parts of the upper pump and the lower pump, such as a pump barrel, a plunger, an oil inlet valve and an oil outlet valve, belong to the conventional technology in the technical field, and can be directly connected by screw thread connection or welding except for clear connection. Of course, the stop valve or the block valve is also the conventional technology in the technical field, and the connection can be directly applied. Of course, all the components can be directly connected in a threaded manner when being connected, and can also be connected by adopting a coupling or a joint or a short section, for example, the connection between the double-channel shunt joint and the outer cylinder in the drawing adopts the coupling or the joint or the short section, for example, the connection between the double-channel shunt joint and the oil inlet valve of the lower pump cylinder in the drawing adopts the coupling or the joint or the short section, so that other components can be analogized, the connection belongs to the conventional technology, and the detailed description is omitted.

The embodiment of the invention comprises an upper pump barrel 1, an oil outlet valve 2, a lower pump barrel 3, a plunger 4, a pressure lever 5, a blocking joint 6, a block valve 7, an outer barrel 8, a lower pump oil inlet valve 9, a dual-channel flow splitting joint 10 and an upper pump oil inlet valve 11, wherein the dual-channel flow splitting joint 10 is provided with a lateral groove 10-1, a central hole 10-2 and a lateral vertical flow passage 10-3, the lateral groove 10-1 is a passage, the lateral vertical flow passage 10-3 is another passage, the central hole 10-2 is a blind hole drilled downwards from the upper end of the dual-channel flow splitting joint 10, the lateral groove 10-1 is communicated with the central hole 10-2, so that the central hole 10-2 is communicated with the outside of the dual-channel flow splitting joint 10, the upper part of the central hole 10-2 is provided with a thread, and the upper part of the dual-channel flow splitting joint 10 is, or an internal thread, the side vertical flow passage 10-3 is positioned between the thread at the upper part of the central hole 10-2 and the external connecting thread at the upper part of the double-channel flow dividing joint 10, the lower part of the lower pump oil inlet valve 9 is connected with the thread at the upper part of the central hole 10-2, the upper part of the lower pump oil inlet valve 9 is provided with a cut-off valve 7, the upper part of the cut-off valve 7 is provided with a lower pump cylinder 3, an outer cylinder 8 is sleeved outside the lower pump cylinder 3, the lower part of the outer cylinder 8 is connected with the external connecting thread at the upper part of the double-channel flow dividing joint, the annular flow passage between the outer cylinder 8 and the lower pump cylinder 3 is communicated with the side vertical flow passage 10-3, the upper part of the upper pump cylinder 1 is provided with an oil pipe thread which can be connected with an oil pipe on a pump and then sent into the well, the lower part of the upper pump cylinder 1 is connected with the upper part of, the lower part of a double-channel flow dividing joint 10 is provided with an upper pump oil inlet valve 11, the upper part of the upper pump oil inlet valve 11 is communicated with a side vertical flow passage 10-3 on the double-channel flow dividing joint 10, oil liquid below the upper pump oil inlet valve 11 flows upwards from the side vertical flow passage 10-3 after passing through the upper pump oil inlet valve 11, liquid flow in the side vertical flow passage 10-3 cannot flow downwards through the upper pump oil inlet valve 11, a retaining joint 6 is arranged at the lower part of a plunger 4 after the plunger 5 penetrates through a plunger 4, the lower part of the plunger 5 penetrates through the retaining joint 6, the plunger 4 is arranged in a lower pump barrel 3, a valve ball on a block valve 7 is inversely seated on a valve seat, the liquid flow cannot flow upwards from the bottom when the valve ball is in a closed state, the lower part of the plunger 5 presses the valve ball on the block valve 7 away from the valve seat matched with the lower part after penetrating through the retaining joint 6, so that the block valve 7 is in an open state, and the lower part of the block valve 5 is, the upper part of the pressure lever 5 is provided with an upward lifting joint 5-1 with the diameter larger than the central aperture of the blocking joint 6, so that the pressure lever 5 can be hung on the blocking joint 6 to move synchronously with the plunger 4, the blocking joint 6 is provided with a communicating hole through which produced liquid can flow, the upper part of the plunger 4 is provided with an oil outlet valve 2, the upper part of the oil outlet valve 2 is provided with sucker rod threads, the sucker rod threads can be sent into a pump cylinder after being connected with a sucker rod column, the plunger 4 can be respectively matched and sealed with the upper pump cylinder 1 and the lower pump cylinder 3, the distance between the lower end surface of the upward lifting joint 5-1 and the upper end surface of the blocking joint 6 is larger than the stroke of a moving stroke pump of the plunger 4 in the lower pump cylinder 3 after the impact prevention distance is lifted, the stroke of the ground oil flushing machine determines, the lower part of the pressure lever 5 can leave the block valve 7 when the plunger 4 is lifted to the upper pump cylinder 1 and the upper pump cylinder 1 to be, the cutoff flow cannot flow upward.

The lifting joint 5-1 is generally screwed on the upper part of the pressure rod 5, and can also adopt forging, welding and other modes.

In order to prevent the lower part of the pressure lever 5 from jumping up into the plunger and being incapable of pressing the valve ball of the block valve 7, the anti-jumping mechanism can be arranged at the plunger 4, the pressure lever 5 and the blocking joint 6, namely the limiting mechanism capable of limiting the axial upward jumping of the pressure lever, as shown in the figure, the anti-jumping mechanism can be provided with a downward pressing joint 5-2 which is connected at the middle lower part of the pressure lever, or an external diameter expansion limiting clamping table of an integrated structure is directly arranged at the middle lower part of the pressure lever, and the connection mode can adopt a threaded connection or a welding structure and the like. Then the external diameter of the pressing joint is larger than the internal diameter of the central hole of the blocking joint 6, and then the blocking joint 6 can press the pressing joint to move downwards when moving downwards along with the plunger, so that the pressing rod can be ensured to press the valve ball of the block valve 7, and the pressing rod is prevented from moving upwards.

The upper pump cylinder 1, the plunger 4, the oil outlet valve 2 and the upper pump oil inlet valve 11 form an upper pump, lower layer oil is pumped through one channel, the lower pump cylinder 3, the plunger 4, the oil outlet valve 2 and the lower pump oil inlet valve 9 form a lower pump, and upper layer oil is pumped through the other channel. Fig. 1 is a state diagram of the extraction of oil in the oil layer. The plunger 4 moves up and down along with the sucker rod, and the oil in the upper oil layer enters the lower pump barrel 3 through the lateral groove 10-1 and the lower pump oil inlet valve 9 and the stop valve 7 to be pumped out. When oil pumping needs to be carried out in a layer changing manner, the plunger 4 is lifted up to the upper pump barrel 1, so that the plunger 4 is matched and sealed with the upper pump barrel 1. At the moment, the lower part of the compression bar 5 leaves the cut-off valve 7, the upper layer of oil cannot enter the lower pump barrel 3, and the lower layer of oil enters the upper pump barrel 1 through the upper pump oil inlet valve 11, the lateral vertical flow passage 10-3 and the annular flow passage between the lower pump barrel 3 and the outer barrel 8 and is pumped out. The lower part of the pressure lever 5 can not touch the sub-block valve 7 all the time when the lower layer oil is pumped is realized by the length of the upper pump barrel 1.

The lower part of a lower pump oil inlet valve 9 is connected with an internal thread at the upper part of a double-channel flow dividing joint 10, the upper part of the lower pump oil inlet valve 9 is provided with a cut-off valve 7, the upper part of the cut-off valve 7 is provided with a lower pump barrel 3, crude oil at the upper layer of an oil well can enter the lower pump barrel 3 through one channel of the double-channel flow dividing joint 10 through the lower pump oil inlet valve 9 and the cut-off valve 7, an outer barrel 8 is sleeved outside the lower pump barrel 3, the lower part of the outer barrel 8 is connected with an external thread at the upper part of the double-channel flow dividing joint 10, an annular flow passage between the outer barrel 8 and the lower pump barrel 3 is communicated with one channel on the double-channel flow dividing joint 10, crude oil at the lower layer of the oil well can enter the annular flow passage between the outer barrel 8 and the lower pump barrel 3 through the channel, the lower part of an upper pump barrel 1 is connected with the upper part of the outer barrel 8, the, the upper part of an upper pump oil inlet valve 11 is communicated with a channel on a double-channel flow splitting joint 10, oil liquid below the upper pump oil inlet valve 11 flows upwards from the channel on the double-channel flow splitting joint 10 after passing through the upper pump oil inlet valve 11 to enter an annular flow channel between an outer cylinder 8 and a lower pump cylinder 3, crude oil at the lower layer of an oil well can enter an upper pump cylinder 1, a retaining joint 6 is arranged at the lower part of a plunger 4 after the plunger 5 penetrates through the plunger 4, the lower part of the plunger 5 penetrates through the retaining joint 6, the plunger 4 is arranged in the lower pump cylinder 3, a valve ball on a block valve 7 is inversely seated on a valve seat, liquid flow cannot flow upwards from below when the valve ball is in a closed state, the valve ball on the block valve 7 is pressed away from the valve seat matched with the valve ball after the lower part of the plunger 5 penetrates through the retaining joint 6, the block valve 7 is in an open state, the block valve 7 is in a closed state after the lower part of the plunger 5 leaves the block valve 7, the, when the blocking joint 6 moves upwards synchronously with the plunger 4, the pressing rod 5 can be hung on the blocking joint 6, then the pressing rod 5 can also move synchronously with the plunger 4, a connecting through hole is formed in the blocking joint 6 and can flow produced liquid, the oil outlet valve 2 is installed on the upper portion of the plunger 4, sucker rod threads are arranged on the upper portion of the oil outlet valve 2, the plunger 4 can be respectively matched and sealed with the upper pump barrel 1 and the lower pump barrel 3, the distance between the lower end face of the lifting joint 5-1 and the upper end face of the blocking joint 6 is larger than the moving stroke of the plunger 4 in the lower pump barrel 3 after the impact distance is lifted, the lower portion of the pressing rod 5 can leave the block valve 7 when the plunger 4 is lifted to the upper pump barrel 1 and the upper pump barrel 1 to be matched for oil pumping, and the block valve 7 is in a closed state.

The double-channel flow dividing joint 10 is provided with a lateral groove 10-1, a central hole 10-2 and a lateral vertical flow passage 10-3, the central hole 10-2 is a blind hole drilled downwards from the upper end of the double-channel flow dividing joint 10, the lateral groove 10-1 is communicated with the central hole 10-2 to enable the central hole 10-2 to be communicated with the outside of the double-channel flow dividing joint 10, the upper part of the central hole 10-2 is provided with a thread, the upper part of the double-channel flow dividing joint 10 is provided with an external connecting thread, the lateral vertical flow passage 10-3 is positioned between the thread on the upper part of the central hole 10-2 and the external connecting thread on the upper part of the double-channel flow dividing joint 10, the lower part of the lower pump oil inlet valve 9 is connected with the internal thread on the upper part of the central hole 10-2, and an annular flow passage between the outer barrel 8 and the, the upper part of the upper pump oil inlet valve 11 is communicated with the side vertical flow passage 10-3, crude oil on the lower layer of the oil well can enter the upper pump barrel 1 through the upper pump oil inlet valve 11, and crude oil on the upper layer of the oil well can enter the lower pump barrel 3 through the lower pump oil inlet valve 9. The number of the connecting through holes on the blocking joint 6 is four, the connecting through holes are positioned on the upper end surface of the blocking joint 6 and are uniformly distributed at the central aperture of the blocking joint 6.

The invention has double channels, the upper pump consisting of the upper pump cylinder, the plunger, the oil outlet valve and the upper pump oil inlet valve pumps the lower layer oil through one channel, the lower pump cylinder consisting of the lower pump cylinder, the plunger, the oil outlet valve and the lower pump oil inlet valve pumps the upper layer oil through the other channel, when the upper layer oil is pumped and the lower layer oil is pumped, the oil inlet channel can be changed by only lifting the plunger to the upper pump cylinder, and the oil pumping and the oil testing of the layer changing of the immobile pipe column are realized.

In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.