CN207934871U - Sand settling device and pipe string - Google Patents

Abstract

The utility model discloses a sand setting device and tubular column, it relates to rod-pumped well sand control technical field, the sand setting device includes: the sand removing pipe penetrates through the sieve pipe, the upper connector is respectively connected with the sieve pipe and the upper end of the sand removing pipe, the sieve pipe or the sand removing pipe is provided with a threaded portion, the threaded portion enables a spiral flow passage to be formed between the sieve pipe and the sand removing pipe, and the spiral flow passage is communicated with the inside of the sand removing pipe. This application can sink the grit, prevents the grit from upwards flowing into the oil-well pump.

Description

Sand settling device and pipe string

technical field

The utility model relates to the technical field of sand control for pumping wells, in particular to a sand setting device and a pipe column.

Background technique

Sand production in oil wells is one of the most urgent problems to be solved in oilfield development. The main reason for sand production in oil wells is generally that the reservoir is loose cemented sandstone. In addition, in the middle and late stages of oilfield development, long-term water injection or gas injection production will also greatly damage the reservoir framework, resulting in sand production in oil wells.

The sand produced by the oil well will cause certain harm to the pumping well, and the harm to the pumping well is mainly manifested in two aspects: 1. The high-speed moving sand enters the pump barrel with the output fluid, thereby damaging the valve seat and valve ball of the pump , causing the oil well pump to leak; 2. Sand grains enter between the pump barrel and the oil well pump plunger, thus causing the oil well pump to get stuck. Therefore, the sand production of oil wells greatly shortens the high-efficiency production period of pumping pumps in pumping wells and the pump inspection cycle of oil wells, resulting in a large reduction in oil well production, a sharp increase in operating costs, and serious economic losses. At present, sand control screens are mainly used for mechanical sand control under pumps. However, due to the different sizes of sand particles, sand control screens cannot effectively prevent sand particles with small particle sizes from entering the pump barrel. Therefore, a new device is urgently needed to solve the above problems.

Utility model content

In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiment of the utility model is to provide a sand settling device and a pipe string, which can sink the sand and prevent the sand from flowing upward into the oil well pump.

The concrete technical scheme of the utility model embodiment is:

A sand setting device, the sand setting device includes: an upper joint, a screen pipe and a sand removal pipe, the sand removal pipe is set in the screen pipe, and the upper joint is connected to the screen pipe and the sand removal pipe respectively. The upper ends of the sand removal pipes are connected, and the screen pipe or the sand removal pipe has a threaded part, and the threaded part makes a spiral flow path formed between the screen pipe and the sand removal pipe, and the spiral flow path It communicates with the inside of the sand removal pipe.

In a preferred embodiment, the sand removal pipe has a threaded part, and the outer side of the threaded part is against the inner wall of the screen pipe to form the spiral flow channel.

In a preferred embodiment, the screen pipe has a threaded portion, and the inner side of the threaded portion abuts against the inner wall of the sand removal pipe to form the spiral flow channel.

In a preferred embodiment, the screen has an opening, and the spiral flow channel is located below the opening.

In a preferred embodiment, the screen has an opening, and the threaded part is located below the opening.

In a preferred embodiment, the lower end of the sand removal pipe is higher than the lower end of the screen pipe.

In a preferred embodiment, the lower end of the upper joint has an external thread, the upper end of the screen has an internal thread, and the external thread of the upper joint is connected to the internal thread of the screen.

In a preferred embodiment, the lower end of the upper joint has an internal thread, the upper end of the sand removal pipe has an external thread, and the internal thread of the upper joint is connected to the external thread of the sand removal pipe.

In a preferred embodiment, there is an annular space between the sand removal pipe and the screen pipe.

A pipe string, the pipe string includes: the sand settling device as described above; a sand settling liner connected to the lower end of the screen pipe; and an oil well pump connected above the upper joint.

The technical solution of the utility model has the following significant beneficial effects:

During the working process of the sand settling device in the present application, the crude oil with sand particles enters between the screen pipe and the sand removal pipe through the screen of the sand settling device, and then the crude oil with sand grains enters the screen pipe and the sand removal pipe. In the spiral flow channel formed between the tubes, the crude oil with sand particles flows downward at high speed in the spiral flow channel to generate centrifugal force. When the crude oil with sand particles leaves the spiral flow channel, the denser solid particles in the crude oil, mechanical Impurities, etc. are thrown downward under the action of centrifugal force and gravity, and then flow down to the bottom of the sand removal pipe, while the crude oil flows into the interior of the sand removal pipe through the lower end of the sand removal pipe, and is recovered under the action of the oil well pump . The sand settling device in this application can change the sand retaining of the original ordinary screen pipe to sand settling, thereby effectively reducing sand particles from entering the oil well pump through the sand removal pipe, and solving the problem of oil well pump stuck due to formation sand. Or the problem of pump valve, pump barrel and plunger wear, and the purpose of prolonging the high-efficiency production period of the oil well pump and the inspection cycle of the oil well is achieved.

With reference to the following description and accompanying drawings, specific embodiments of the present utility model are disclosed in detail, indicating how the principle of the present utility model can be adopted. It should be understood that the embodiments of the present invention are not limited thereby in scope. Embodiments of the invention encompass many changes, modifications and equivalents within the spirit and scope of the appended claims. Features described and/or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

Description of drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help the understanding of the present utility model, and do not specifically limit the shapes and proportional dimensions of the various components of the present utility model. Under the teaching of the utility model, those skilled in the art can choose various possible shapes and proportional dimensions according to specific conditions to implement the utility model.

Fig. 1 is a schematic structural view of a sand settling device in an embodiment of the utility model.

Reference signs of the above drawings:

1. Upper joint; 2. Sand removal pipe; 3. Screen pipe; 31. Opening; 4. Threaded part; 5. Spiral flow channel; 6. Annular space.

Detailed ways

The details of the utility model can be understood more clearly in combination with the accompanying drawings and the description of the specific implementation of the utility model. However, the specific embodiments of the utility model described here are only for the purpose of explaining the utility model, and cannot be construed as limiting the utility model in any way. Under the teaching of the present utility model, skilled persons can conceive any possible deformation based on the present utility model, and these should be considered as belonging to the scope of the present utility model. It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it may be a mechanical connection or an electrical connection, or it may be an internal communication between two components, either directly or indirectly through an intermediary, Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and do not represent the only embodiment. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to sink the sand and prevent the sand from flowing upward into the oil well pump, a sand setting device is proposed in this application. Fig. 1 is a structural schematic diagram of the sand setting device in the embodiment of the utility model, as shown in Fig. 1 Shown, the sand settling device in the present application comprises: upper joint 1, screen pipe 3 and desanding pipe 2, and desanding pipe 2 is penetrated in screen pipe 3, and upper joint 1 is connected with screen pipe 3 and desanding pipe 2 respectively. The upper ends are connected, the screen pipe 3 or the sand removal pipe 2 has a threaded part 4, the threaded part 4 makes a spiral flow channel 5 formed between the screen pipe 3 and the sand removal pipe 2, and the spiral flow channel 5 is connected with the inside of the sand removal pipe 2 Pass.

During the working process of the sand settling device in the present application, the crude oil with sand particles enters between the screen pipe 3 and the sand removal pipe 2 through the screen pipe 3 of the sand settling device, and then the crude oil with sand grains enters the screen pipe 3 and the sand removal pipe 2. In the spiral flow channel 5 formed between the sand removal pipes 2, the crude oil with sand particles flows downward in the spiral flow channel 5 at a high speed to generate centrifugal force. When the crude oil with sand particles leaves the spiral flow channel 5, the crude oil in the crude oil The denser solid particles and mechanical impurities are thrown downward under the action of centrifugal force and gravity, and then flow down to the bottom of the sand removal pipe 2, while the crude oil flows into the interior of the sand removal pipe 2 through the lower end of the sand removal pipe 2 , is produced under the action of the well pump. Through the sand settling device in this application, the sand retaining device of the original ordinary screen pipe 3 can be changed into sand settling, thereby effectively reducing sand particles from entering the oil well pump through the sand removal pipe 2, and solving the problem of the oil well pump caused by the formation of sand. The problem of stuck pump or pump valve, pump barrel, and plunger wear has achieved the purpose of prolonging the high-efficiency production period of the oil well pump and the inspection cycle of the oil well.

In order to better understand the sand settling device in this application, it will be further explained and illustrated below. As shown in Figure 1, the sand removal pipe 2 is pierced in the screen pipe 3, so that there is an annular space 6 between the sand removal pipe 2 and the screen pipe 3, and the crude oil with sand particles outside the screen pipe 3 can pass through the screen pipe 3 flows into the annular space 6, and then flows downward in the annular space 6.

As shown in FIG. 1 , the upper ends of the screen pipe 3 and the sand removal pipe 2 are connected through an upper joint 1 . Specifically, the lower end of the upper joint 1 has an external thread, the upper end of the screen pipe 3 has an internal thread, and the external thread of the upper joint 1 is connected with the internal thread of the screen pipe 3 . The lower end of the upper joint 1 has an internal thread, the upper end of the sand removal pipe 2 has an external thread, and the internal thread of the upper joint 1 is connected with the external thread of the sand removal pipe 2 . In other embodiments, the upper ends of the screen pipe 3 and the sand removal pipe 2 may also be connected to the upper joint 1 by other connection methods. The upper end of the upper joint 1 can be provided with an internal thread or an external thread, so as to be connected with other components.

As shown in FIG. 1 , in one embodiment, the outer wall of the sand removal pipe 2 has a threaded portion 4 , and the outer side of the threaded portion 4 is against the inner wall of the screen pipe 3 to form a spiral flow channel 5 . The screen pipe 3 has an opening 31 , and the spiral channel 5 is located below the opening 31 . The lower end of the sand removal pipe 2 is higher than the lower end of the screen pipe 3 . When the crude oil with sand particles flows into the screen pipe 3 to the annular space 6 through the opening 31 of the screen pipe 3, and then flows downward into the spiral flow channel 5, the crude oil with sand particles flows downward at a high speed in the spiral flow channel 5 so that Centrifugal force is generated, when the crude oil with sand grains leaves the spiral flow channel 5, the solid particles and mechanical impurities in the crude oil are thrown downward under the action of centrifugal force and gravity, and then flow downward to the sand removal pipe 2 The bottom is discharged or collected by other mechanisms, while the crude oil flows into the interior of the sand removal pipe 2 through the lower end of the sand removal pipe 2, and is extracted under the action of the oil well pump. In another embodiment, the inner wall of the screen pipe 3 has a threaded portion 4 , and the inner side of the threaded portion 4 abuts against the inner wall of the sand removal pipe 2 to form a spiral flow channel 5 . The screen pipe 3 has an opening 31 , and the spiral channel 5 is located below the opening 31 . The lower end of the sand removal pipe 2 is higher than the lower end of the screen pipe 3 .

This application also proposes a pipe string, which includes: any one of the above-mentioned grit settling devices; a grit settling liner connected to the lower end of the screen pipe 3; and an oil well pump connected to the top joint 1 . The sand settling tailpipe is used to collect sand particles or mechanical impurities thrown out from the spiral flow channel 5 in the sand settling device. During the action of the pipe string, the upper joint 1 of the sand settling device is connected with the barrel of the oil well pump, and the screen pipe 3 is connected with the sand settling tailpipe. Then connect the barrel of the oil well pump and the oil pipe on the upper part of the oil well pump to the design position in sequence, and then lower the plunger and sucker rod of the oil well pump in order according to the design requirements, so as to realize the sand control of the pump well. The sand settling device and pipe string in this application have been tested on the well of the pumping unit. During the test, the high-efficiency production period of the pump was extended from 78 days to 167 days, and the pump inspection period was also changed from 103 days to the original extended to 218 days.

The above-mentioned implementations in this specification are described in a progressive manner, the same and similar parts of the implementations may be referred to each other, and each implementation focuses on the differences from other implementations. All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of" describing a combination shall include the identified elements, ingredients, parts or steps as well as other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. Use of the terms "comprising" or "comprising" to describe a combination of elements, ingredients, parts or steps herein also contemplates an embodiment that consists essentially of these elements, ingredients, parts or steps. By using the term "may" herein, it is intended that inclusion of "may" in any of the described attributes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step may be divided into separate plural elements, ingredients, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not meant to exclude other elements, ingredients, parts or steps.

The above descriptions are only a few implementations of the present utility model. Although the disclosed implementations of the present utility model are as above, the content described above is only for the convenience of understanding the present utility model and is not intended to limit the present utility model. Anyone skilled in the technical field to which the utility model belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the utility model, but the patent of the utility model The scope of protection must still be based on the scope defined in the appended claims.

Claims (10)

1. A sand settling device, characterized in that the sand settling device comprises: an upper joint, a screen pipe and a sand removal pipe, the sand removal pipe is penetrated in the screen pipe, and the upper joint is connected with the sand removal pipe respectively. The screen pipe is connected to the upper end of the sand removal pipe, and the screen pipe or the sand removal pipe has a threaded part, and the threaded part makes a spiral flow channel between the screen pipe and the sand removal pipe , the spiral channel communicates with the inside of the sand removal pipe. 2 . The sand settling device according to claim 1 , wherein the sand removal pipe has a threaded portion, and the outer side of the threaded portion abuts against the inner wall of the screen pipe to form the spiral flow channel. 3 . 3 . The sand settling device according to claim 1 , wherein the screen pipe has a threaded portion, and the inner side of the threaded portion abuts against the inner wall of the sand removal pipe to form the spiral flow channel. 4 . 4. The sand settling device according to claim 2 or 3, wherein the screen has an opening, and the spiral flow channel is located below the opening. 5. The sand settling device according to claim 1, wherein the screen has an opening, and the threaded part is located below the opening. 6. The sand settling device according to claim 1, characterized in that, the lower end of the sand removing pipe is higher than the lower end of the screen pipe. 7. The sand settling device according to claim 1, wherein the lower end of the upper joint has an external thread, the upper end of the screen has an internal thread, and the external thread of the upper joint is connected to the screen of the screen. internal thread connection. 8. The sand settling device according to claim 1, characterized in that, the lower end of the upper joint has an internal thread, the upper end of the desanding pipe has an external thread, and the internal thread of the upper joint is in contact with the desanding pipe. The external thread of the pipe is connected. 9. The sand settling device according to claim 1, characterized in that there is an annular space between the sand removal pipe and the screen pipe. 10. A pipe string, characterized in that the pipe string comprises: the sand settling device according to any one of claims 1 to 9; a sand settling liner connected to the lower end of the screen; connected to the Oil well pump above the upper coupling.