CN214787356U

CN214787356U - Injection well sampling device

Info

Publication number: CN214787356U
Application number: CN202120096008.8U
Authority: CN
Inventors: 韩保锋; 蔡微微; 高生伟; 杨亚强; 周宗延; 唐渤海; 赵永山
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudao Oil Extraction Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudao Oil Extraction Plant
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-11-19
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses an injection well sampling device, which comprises a communicating pipe and at least two ball valves, wherein two ends of one part of the ball valves are connected with the communicating pipe; one end of the other part of the ball valve is connected with the communicating pipe, and the other end of the ball valve is communicated with the atmosphere; its sample convenient and fast guarantees that the solution sample of getting is fresh, does not have the shearing that inside and outside pressure difference caused, and the chemical examination effect is true and accurate, can not influence the normal work operation of injecting the well in the sample in-process moreover, need not to carry out the sample of empting, avoids producing the waste liquid, avoids having sewage, exhaust pollution, has reduced worker intensity of labour.

Description

Injection well sampling device

Technical Field

The utility model relates to a sample work technical field of injection well is injected in the oil field development especially relates to an injection well sampling device.

Background

In the development process of an oil field, an oil well is responsible for extracting crude oil from a stratum, an injection well can inject liquid into the stratum, the injected liquid can perform displacement operation, and the energy of the stratum is supplemented to maintain the stability of the stratum. The liquid injected into the injection well comprises produced water, chemical agents, polymer mixed liquid and the like. In order to ensure the injection quality, the quality of the injection liquid needs to be monitored at any time, and a series of indexes such as viscosity, concentration and content of the injection liquid need to be tested, so that the injection liquid needs to be sampled at a wellhead Christmas tree, and then the sample needs to be tested and detected in a laboratory. Generally need carry out a chemical examination to the injected liquid sample of injection well every fifteen days, take online sampling in order to guarantee that data accuracy, need will advance at the well head during the sample, the outlet valve is closed, open the sample valve and take a sample, close the well at every turn and must cooperate with the injection station, if close the well under the injection station condition of not informing, can cause the injection station to hold the pump, be unfavorable for effectively accomplishing of injection scheme, join in marriage the station and frequently fall the flow to the well head, increase staff's work load. In addition, the shut-in time in winter is too long, and the polymer mother liquor easily causes freezing and blocking accidents of pipelines and well head valves due to poor fluidity, so that the concentration and viscosity value of a sample can be influenced, and the sampling verification times are increased. The prior art has designed multiple incessant well sampling valves to the problem that above-mentioned exists, need to annotate and gather a terminal welding interface of flow, connect sampling valve up, incessant well sample. But has the following disadvantages: (1) each sampling needs to be carried with a sampling tool, a sample barrel, a pipe wrench, a spanner and other tools; (2) in order to guarantee the accuracy of a sample assay during sampling, a sample retained at the tail end needs to be discharged, but the treatment of the emptying solution has an environmental protection hidden trouble.

The utility model patent document with patent number 201820012146.1 discloses the technical solution: the utility model provides a polymer drives injection well annular binary channels and does not close well step-down sample valve, includes the outer tube, and the outer tube both ends are equipped with the clamp head, inside the being equipped with of outer tube passageway pipe, interior passageway pipe and outer tube are equipped with import ball valve, step-down atmospheric valve, sample valve and export ball valve from left to right in proper order between interior passageway pipe and the outer tube. In the field use process, the annular sleeve double-channel high-pressure ball valve is provided, the inlet and the outlet of the inner channel of the annular sleeve double-channel high-pressure ball valve are closed during sampling, and the polymer mother liquid passes through a gap between the inner diameter of the outer channel and the outer diameter of the inner channel. The sampling valve is vertical in a double channel of the sleeve, the valve rod adopts linear sealing, and the sampling of the inner channel realizes sampling without closing the well; but it only achieves sampling without shutting down the well, but still has the problem of needing to be emptied.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection well sampling device, the sample at every turn that exists among the solution prior art need carry sampling tool, instrument such as appearance bucket, breakout tongs, spanner, and for the accuracy of guarantee sample chemical examination during the sample, need discharge the sample of terminal retention, but there is environmental protection hidden danger scheduling problem in the processing of this emptying solution.

In order to achieve the above object, the utility model adopts the following technical scheme:

a sampling device for an injection well comprises a communicating pipe and at least two ball valves, wherein two ends of one part of the ball valves are connected with the communicating pipe; and one end of the other part of the ball valve is connected with the communicating pipe, and the other end of the ball valve is communicated with the atmosphere.

In the above aspect, it is preferable that the ball valve includes a first ball valve, a second ball valve, a third ball valve, and a fourth ball valve.

It may also be preferable that both ends of the first ball valve and the third ball valve are connected to a communication pipe.

It is also preferable that one end of the second ball valve and one end of the fourth ball valve are connected to the communicating pipe, and the other end is communicated with the atmosphere.

It may also be preferred that the second ball valve is connected with the atmosphere downwards and the fourth ball valve is connected with the atmosphere upwards.

It may also be preferred that the injector well sampling apparatus is mounted on the intake tubing of an injector well christmas tree.

The utility model discloses an injection well sampling device's beneficial effect as follows:

the utility model discloses an injection well sampling device can solve the problems that in the prior art, each sampling needs to be carried with sampling tools, such as a sample barrel, a pipe wrench, a spanner, and the like, and the remaining samples at the tail end need to be discharged in an emptying manner in order to ensure the fresh accuracy of the sample assay during the sampling, and the excessive samples are difficult to process after the sampling is finished, so that the environmental protection hidden danger exists; its sample convenient and fast guarantees that the solution sample of getting is fresh, does not have the shearing that inside and outside pressure difference caused, and the chemical examination effect is true accurate, and can not influence the normal work operation of injecting the well in the sample process, need not to carry out the sample of empting, avoids producing the waste liquid, avoids having sewage, exhaust pollution, has reduced worker intensity of labour.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is the structure schematic diagram of the injection well sampling device of the utility model.

In the figure, 1 is the communicating pipe, 21 is the first ball valve, 22 is the second ball valve, 23 is the third ball valve, 24 is the fourth ball valve, 3 is injection well christmas tree, 4 is the christmas tree feed liquor pipe, 5 is oil well feed liquor pipe, 6 is the check valve, 7 is sleeve pipe feed liquor pipe, 8 is the well site terrace.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Examples

A kind of injection well sampling device, as shown in figure 1, install on the Christmas tree liquid inlet pipe 4 of the injection well Christmas tree 3, the Christmas tree liquid inlet pipe 4 UNICOM oil well liquid inlet pipe 5 of the stratified injection well, through the check valve 6, and then inject into the DH via the injection well Christmas tree 3. The liquid inlet pipe 2 is connected with a sleeve liquid inlet pipe 7. Injection well sampling device installs on feed liquor pipe 2, comprises communicating pipe 1, first ball valve 21, second ball valve 22, third ball valve 23, fourth ball valve 24, and first ball valve 21, third ball valve 23 both ends are connected with communicating pipe, and communicating pipe 1 is connected to second ball valve 22, fourth ball valve 24 one end, one end and atmosphere UNICOM. When in normal production, the ball valves are all closed, and no liquid is arranged in the communicating pipe 1, so that the pipe is prevented from being frozen in winter. When sampling, the first ball valve 21 and the third ball valve 23 are opened to form a smooth passage, the solution in the Christmas tree liquid inlet pipe 4 circulates from the communicating pipe 1 under the action of the pressure of the flowing liquid, and the freshness of the solution in the communicating pipe 1 is ensured after the solution circulates for 3 min. Close third ball valve 23, close first ball valve 21 again, place the sampling bucket at second ball valve 22 lower extreme, open second ball valve 22, will communicate in 1 solution emits the sampling bucket, open fourth ball valve 24, make the air can get into communicating pipe 1 smoothly, the solution flows out smoothly in the guarantee communicating pipe 1. And after the solution is emptied, the second ball valve 22 and the fourth ball valve 24 are closed, and the sampling work is finished. The ball valve can be a stainless steel ball valve. The above procedure is equally applicable to stratified injection wells. The outer diameter of the communication pipe 1 may be 34mm and the wall thickness may be 5 mm.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. An injection well sampling device comprises a communicating pipe (1) and at least two ball valves, and is characterized in that two ends of one part of the ball valves are connected with the communicating pipe (1); one end of the other part of the ball valve is connected with the communicating pipe (1), and the other end of the ball valve is communicated with the atmosphere.

2. An injection well sampling apparatus as claimed in claim 1 wherein the ball valves comprise a first ball valve (21), a second ball valve (22), a third ball valve (23) and a fourth ball valve (24).

3. An injection well sampling device as claimed in claim 2 characterised in that the first ball valve (21) and the third ball valve (23) are connected at both ends to the communicating tube (1).

4. An injection well sampling device as claimed in claim 3 characterised in that the second ball valve (22) and the fourth ball valve (24) are connected at one end to the connector (1) and at the other end to the atmosphere.

5. An injection well sampling apparatus as claimed in claim 4 wherein the second ball valve (22) is down atmospheric connection and the fourth ball valve (24) is up atmospheric connection.

6. An injection well sampling device as claimed in claim 1, characterised in that it is mounted on the intake tubing (4) of an injection well christmas tree (3).