CN207332836U - Shaft Wax Removal Dosing Device - Google Patents

Abstract

The utility model provides a pit shaft paraffin removal charge device, including storing up medicine mechanism, deepening the inside injection mechanism of oil pipe and connecting the conveying mechanism between storing up medicine mechanism and injection mechanism, store up medicine mechanism including being used for storing the medicament to provide the dosing tank of medicament to injection mechanism at any time, the dosing tank is fixed subaerial, and this pit shaft paraffin removal charge device can continuously inject the paraffin control medicament into oil pipe, improves paraffin removal effect.

Description

Shaft Wax Removal Dosing Device

technical field

The utility model relates to oil well wax removal technology, in particular to a wellbore wax removal and dosing device.

Background technique

In the process of crude oil production, oil well scaling and wax deposition seriously affect the normal production of oil wells. Implementing anti-wax and anti-scaling measures for oil wells is an important means to ensure the normal production of oil wells. At present, the most important measure for removing scale and paraffin in oil wells is well flushing. For scaled wells, acidic scale remover is generally used for well flushing, and for wax-deposited wells, paraffin remover is generally used for well flushing. However, there are disadvantages such as cumbersome construction, high cost, and short cycle in well flushing. Mechanical descaling and wax removal are cumbersome, and some problems will be encountered in equipment tool damage, jamming and high capital expenditure. Other ways of removing dirt and wax have no obvious effect. Chemical wax and scale control has the advantages of low cost, safety and reliability, and remarkable effect, and is favored by major oil fields.

At present, the method of chemical wax and scale prevention is mainly to transport the chemical agent to the oil well head through the chemical dosing vehicle, first release the pressure on the drug delivery port of the well head, to avoid the excessive pressure in the drug delivery port and prevent the drug from entering the drug delivery port, and then add the drug to the oil well head. The drug delivery pipe of the drug cart is connected to the drug delivery port of the wellhead to directly pour the drug into the oil pipe, so as to realize the cleaning of the wax collected on the inner wall of the oil pipe.

However, the volume of the medicine carried by the dosing vehicle is limited. After the medicine is infused, it needs to be re-transported. Therefore, the dosing of the dosing vehicle has discontinuity, resulting in a short period of action of the medicine, and the effect of wax removal is not obvious. Measures such as pressure release must be carried out during dosing construction, and the procedure is very complicated, which affects normal production.

Utility model content

The utility model provides a wellbore wax removal and dosing device to overcome the limited volume of medicines carried by the dosing cart in the prior art and the need to re-transport the medicines, so the dosing of the dosing cart has discontinuity, resulting in a short period of action of the medicines , the technical problem that the effect of wax removal is not obvious.

The utility model provides a wellbore paraffin removal and dosing device, which includes a drug storage mechanism, a drug injection mechanism that penetrates into the oil pipe, and a delivery mechanism connected between the drug storage mechanism and the drug injection mechanism. The drug storage mechanism includes a drug storage mechanism, And provide the dosing box of the medicine to the injection mechanism at any time, and the dosing box is fixed on the ground.

Optionally, the conveying mechanism also includes at least one blowout device, each blowout device includes a blowout pipeline communicated with the outlet of the oil pipe, and a blowout valve and a pressure gauge are arranged on the blowout pipeline.

Optionally, the delivery mechanism includes a medicine delivery pipeline and a medicine dosing pump. The medicine dosing box and the medicine injection mechanism are connected through the medicine delivery pipeline. Flow in the drug delivery pipeline.

Optionally, the drug injection mechanism includes a drug injection tube, a drug injection valve and a weighted rod, the drug injection tube is connected to the drug delivery pipeline, the drug injection valve is arranged on the drug injection tube, and the weighted rod is connected to the lower end of the drug injection tube.

Optionally, a wax scraper is arranged between the medicament injection valve and the weighting rod.

Optionally, a one-way valve is provided on the medicine injection pipe, and the one-way valve is located between the medicine injection valve and the medicine delivery pipeline.

Optionally, at least one first shut-off valve is arranged on the upper end of the one-way valve on the drug delivery pipeline, and the first shut-off valve is located at the wellhead.

Optionally, a flow control valve is arranged at the outlet of the dosing pump, and a second cut-off valve is arranged at the inlet of the dosing pump.

Optionally, the medicine storage mechanism also includes a heating belt wound on the medicine adding box.

Optionally, a pressure gauge is provided at the outlet of the dosing pump.

The utility model provides a wellbore paraffin removal and dosing device, which includes a drug storage mechanism, a drug injection mechanism that penetrates into the oil pipe, and a delivery mechanism connected between the drug storage mechanism and the drug injection mechanism. The drug storage mechanism includes a drug storage mechanism, And provide the dosing box of the medicine to the injection mechanism at any time. The dosing box is fixed on the ground. The wellbore wax removal and dosing device can continuously inject the wax removal and anti-wax medicine into the oil pipe to overcome the problems contained in the dosing vehicle in the prior art. The volume of the medicine is limited and the medicine needs to be re-transported. Therefore, the dosing cart has discontinuity in dosing, which causes the technical problems of short action period of the medicine and ineffective wax removal effect, so as to improve the wax removal effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the appended drawings in the following description The drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings on the premise of not paying creative labor.

Fig. 1 is a schematic structural view of Embodiment 1 of a wellbore wax removal and dosing device of the present invention;

Fig. 2 is a structural schematic diagram of Embodiment 2 of the wellbore paraffin removal and dosing device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1

Fig. 1 is a structural schematic diagram of Embodiment 1 of the wellbore wax removal and dosing device of the present invention; as shown in Fig. The medicine mechanism 2 and the delivery mechanism connected between the medicine storage mechanism and the medicine injection mechanism, the medicine storage mechanism 1 includes a dosing box 11 for storing medicine and providing medicine to the medicine injection mechanism at any time, and the medicine adding box 11 is fixed on the ground superior.

It should be noted that the dosing box can transfer the wax-removing and anti-wax agent in the dosing box to the injection mechanism through the conveying structure. The injection mechanism is located inside the oil pipe, and the injection mechanism can directly spray the wax-removing and anti-wax agent on the inner wall of the oil pipe. In addition, the position of the injection mechanism can be adjusted arbitrarily according to the wax collection position of the oil pipe. Optionally, the dosing box includes a liquid level gauge for measuring the liquid level of the medicine in the dosing box, and the clear water in the dosing box can be observed through the liquid level gauge The volume of the anti-wax agent should be replenished in time to the dosing box to ensure that the wax-removing and anti-wax agent in the dosing box can be used continuously.

Specifically, the delivery mechanism includes a medicine delivery pipeline 32 and a medicine dosing pump 33, the medicine dosing box 11 communicates with the medicine injection mechanism 2 through the medicine delivery pipeline 32, and the medicine addition pump 33 is arranged between the medicine dosing box 11 and the medicine injection mechanism 2 The space is used to drive the medicine to flow in the medicine delivery pipeline.

It should be noted that the dosing pump can be a single-suction pump or a double-suction pump. Correspondingly, one or two dosing boxes can be installed. When there are two dosing boxes, the two dosing pumps of the double-suction pump The suction ports are respectively connected to the two dosing boxes, and the dosing pump is set as a double suction pump and connected to the two dosing boxes respectively. When one dosing box fails, the other dosing box can continue to flow into the oil pipe. Provide anti-wax agent to ensure uninterrupted injection.

Specifically, the drug injection mechanism 2 includes a drug injection tube 21, a drug injection valve 22, and a weighted rod 23. The drug injection tube 21 is connected to the drug delivery pipeline 32. at the lower end of the injection tube.

It should be noted that the medicine injection pipe is a telescopic pipeline, and the position of the medicine injection valve can be adjusted by changing the length of the medicine injection pipe. The medicine injection valve is a multi-outlet valve. Outlet cylindrical valve, the upper opening of the cylindrical valve is connected with the injection pipe, and the lower end is sealed. The chemical outlets on the side of the cylindrical valve are evenly distributed on the circumference of the cylindrical valve, and the chemical outlets are all facing the inner wall of the tubing. When the medicine injection valve is delivering medicine, the medicine is sprayed from the side of the cylindrical valve to the inner wall of the oil pipe, so that more medicine can be used to collect wax on the inner wall of the oil pipe to improve the utilization rate of the medicine. On the lower side, the weighted rod increases the overall weight of the injection mechanism to prevent the injection mechanism from moving toward the wellhead under the action of oil pressure.

Specifically, a wax scraper 24 is provided between the medicament injection valve 22 and the weight rod 23 .

It should be noted that the wax scraper is a mechanical wax scraper device, which can be a cylindrical structure with a cutting surface. The axial direction of the wax scraper is parallel to the axial direction of the oil pipe. The diameter of the wax scraper is slightly smaller than the inner diameter of the oil pipe. When moving up and down, the cutting surface can cut off the wax collected on the inner wall of the tubing. There is a wax scraper between the chemical injection valve and the weighting rod. When the chemical injection valve is injected at one position and moves to another position, The wax scraper can remove the residual wax after injecting the wax to improve the effect of wax removal.

Specifically, a one-way valve 25 is provided on the medicine injection pipe 21, and the one-way valve 25 is located between the medicine injection valve 22 and the medicine delivery pipeline 32. direction of flow.

It should be noted that the oil pressure in the oil pipe is not stable, and may suddenly rise. At this time, the staff cannot close the medicine delivery pipeline in time, so a check valve 25 is provided on the medicine injection pipe 21. The conduction direction of the valve 25 is the direction in which the medicine in the dosing box flows to the medicine injection mechanism, so as to prevent the crude oil in the oil pipe from flowing into the medicine delivery pipeline, causing the medicine delivery pipeline to be polluted and blocked.

Specifically, two first stop valves 34 are arranged on the upper end of the one-way valve 25 on the drug delivery pipeline 32, and the first stop valves 34 are located at the wellhead.

It should be noted that when the wellhead staff finds that the pressure in the oil pipe exceeds the preset pressure through the pressure gauge 6, they can prevent the crude oil from entering the drug delivery pipeline by closing the first valve 34. Optionally, the first valve can be provided with one, or Multiple first valves can be set, and the simultaneous use of multiple first valves can improve the blocking effect on crude oil.

Specifically, a flow control valve 35 is arranged at the outlet of the dosing pump, and a second cut-off valve 36 is arranged at the inlet of the dosing pump.

It should be noted that the flow control valve can control the flow rate of the wax-removing and anti-wax agent delivered by the dosing pump to the injection mechanism. Different dosing volumes can be selected according to actual conditions. There is a second stop valve at the inlet of the dosing pump. When the pump fails, the dosing pump can be maintained by closing the second shut-off valve.

Specifically, the medicine storage mechanism 1 also includes a heating belt 12 wound on the medicine filling box.

It should be noted that when the weather is cold, the wax-removing and anti-wax agent is easy to solidify into a solid, so that it is impossible to add the drug to remove the wax. Wrapping a heating tape on the drug-dosing box can heat the drug-dosing box to avoid the wax-removing agent. Solidification, optional, a protective shell can also be added outside the dosing box.

Specifically, a pressure gauge 37 is provided at the outlet of the dosing pump.

It should be noted that the pressure gauge 37 can measure the pressure in the medicine delivery pipeline. When the pressure direction in the medicine delivery pipeline is the same as the direction of the medicine dosing box to the medicine injection mechanism, it means that the oil pressure in the oil pipe is normal and the medicine can be continued. When the direction of the pressure in the medicine delivery pipeline is opposite to the direction of the medicine dosing box towards the medicine injection mechanism, it means that the oil pressure in the oil pipe is too high and backflow has occurred, and it is necessary to close the valve 36 in time to prevent crude oil from flowing into the medicine dosing box and contaminating the medicine .

This embodiment provides a wellbore paraffin removal and dosing device, including a drug storage mechanism, a drug injection mechanism that penetrates into the oil pipe, and a delivery mechanism connected between the drug storage mechanism and the drug injection mechanism. The drug storage mechanism includes a drug storage mechanism, And provide the dosing box of the medicine to the injection mechanism at any time. The dosing box is fixed on the ground. The wellbore wax removal and dosing device can continuously inject the wax removal and anti-wax medicine into the oil pipe to overcome the problems contained in the dosing vehicle in the prior art. The volume of the medicine is limited and the medicine needs to be re-transported. Therefore, the dosing cart has discontinuity in dosing, which causes the technical problems of short action period of the medicine and ineffective wax removal effect, so as to improve the wax removal effect.

Example 2

Fig. 2 is a structural schematic diagram of the second embodiment of the wellbore wax removal and dosing device of the present invention. As shown in Fig. The medicine mechanism 2 and the delivery mechanism connected between the medicine storage mechanism and the medicine injection mechanism, the medicine storage mechanism 1 includes a dosing box 11 for storing medicine and providing medicine to the medicine injection mechanism at any time, and the medicine adding box 11 is fixed on the ground superior.

It should be noted that the dosing box can transfer the wax-removing and anti-wax agent in the dosing box to the injection mechanism through the conveying structure. The injection mechanism is located inside the oil pipe, and the injection mechanism can directly spray the wax-removing and anti-wax agent on the inner wall of the oil pipe. In addition, the position of the injection mechanism can be adjusted arbitrarily according to the wax collection position of the oil pipe. Optionally, the dosing box includes a liquid level gauge for measuring the liquid level of the medicine in the dosing box, and the clear water in the dosing box can be observed through the liquid level gauge The volume of the anti-wax agent should be replenished in time to the dosing box to ensure that the wax-removing and anti-wax agent in the dosing box can be used continuously.

Specifically, the conveying mechanism also includes two blowout devices, each of which includes a blowout pipeline 31 communicated with the outlet of the oil pipe 4, and the blowout pipeline 31 is provided with a blowout valve 5 and a pressure gauge 6.

It should be noted that the discharge device is used to discharge the crude oil in the oil pipe when the pressure in the oil pipe is too high, so as to reduce the pressure of the crude oil in the oil pipe on the injection mechanism, and prevent the crude oil from entering the delivery mechanism from the injection mechanism and pollute To block the pipeline, specifically, the oil pressure in the discharge pipeline can be observed through the pressure gauge, which is approximately considered to be the pressure of the oil pipeline on the injection mechanism. When the pressure of the pressure gauge exceeds the set pressure, the discharge valve 5 is opened to reduce the pressure. The pressure of the small oil pipe to the injection mechanism is optional. One or more spraying devices can be set, and the pressure in the oil pipe can be adjusted by opening the spraying valves of different spraying devices at the same time. Multiple spraying devices can also be used as redundant settings, and when a certain spraying device is damaged, other spraying devices can be used to replace it in time. Optionally, the pressure gauge can be a pressure sensor, the pressure sensor is connected to a controller, and the controller is connected to a plurality of discharge valves, and the controller can control different numbers of discharge valves to open according to different pressure signals transmitted by the pressure sensor.

Specifically, the delivery mechanism includes a medicine delivery pipeline 32 and a medicine dosing pump 33, the medicine dosing box 11 communicates with the medicine injection mechanism 2 through the medicine delivery pipeline 32, and the medicine addition pump 33 is arranged between the medicine dosing box 11 and the medicine injection mechanism 2 The space is used to drive the medicine to flow in the medicine delivery pipeline.

It should be noted that the dosing pump can be a single-suction pump or a double-suction pump. Correspondingly, one or two dosing boxes can be installed. When there are two dosing boxes, the two dosing pumps of the double-suction pump The suction ports are respectively connected to the two dosing boxes, and the dosing pump is set as a double suction pump and connected to the two dosing boxes respectively. When one dosing box fails, the other dosing box can continue to flow into the oil pipe. Provide anti-wax agent to ensure uninterrupted injection.

Specifically, the drug injection mechanism 2 includes a drug injection tube 21, a drug injection valve 22, and a weighted rod 23. The drug injection tube 21 is connected to the drug delivery pipeline 32. at the lower end of the injection tube.

It should be noted that the medicine injection pipe is a telescopic pipeline, and the position of the medicine injection valve can be adjusted by changing the length of the medicine injection pipe. The medicine injection valve is a multi-outlet valve. Outlet cylindrical valve, the upper opening of the cylindrical valve is connected with the injection pipe, and the lower end is sealed. The chemical outlets on the side of the cylindrical valve are evenly distributed on the circumference of the cylindrical valve, and the chemical outlets are all facing the inner wall of the tubing. When the medicine injection valve is delivering medicine, the medicine is sprayed from the side of the cylindrical valve to the inner wall of the oil pipe, so that more medicine can be used to collect wax on the inner wall of the oil pipe to improve the utilization rate of the medicine. On the lower side, the weighted rod increases the overall weight of the injection mechanism to prevent the injection mechanism from moving toward the wellhead under the action of oil pressure.

Specifically, a wax scraper 24 is provided between the medicament injection valve 22 and the weight rod 23 .

It should be noted that the wax scraper is a mechanical wax scraper device, which can be a cylindrical structure with a cutting surface. The axial direction of the wax scraper is parallel to the axial direction of the oil pipe. The diameter of the wax scraper is slightly smaller than the inner diameter of the oil pipe. When moving up and down, the cutting surface can cut off the wax collected on the inner wall of the tubing. There is a wax scraper between the chemical injection valve and the weighting rod. When the chemical injection valve is injected at one position and moves to another position, The wax scraper can remove the residual wax after injecting the wax to improve the effect of wax removal.

Specifically, a one-way valve 25 is provided on the medicine injection pipe 21, and the one-way valve 25 is located between the medicine injection valve 22 and the medicine delivery pipeline 32. direction of flow.

It should be noted that the oil pressure in the oil pipe is not stable, and may suddenly rise. At this time, the staff cannot close the medicine delivery pipeline in time, so a check valve 25 is provided on the medicine injection pipe 21. The conduction direction of the valve 25 is the direction in which the medicine in the dosing box flows to the medicine injection mechanism, so as to prevent the crude oil in the oil pipe from flowing into the medicine delivery pipeline, causing the medicine delivery pipeline to be polluted and blocked.

Specifically, two first stop valves 34 are arranged on the upper end of the one-way valve 25 on the drug delivery pipeline 32, and the first stop valves 34 are located at the wellhead.

It should be noted that when the wellhead staff finds that the pressure in the oil pipe exceeds the preset pressure through the pressure gauge 6, they can prevent the crude oil from entering the drug delivery pipeline by closing the first valve 34. Optionally, the first valve can be provided with one, or Multiple first valves can be set, and the simultaneous use of multiple first valves can improve the blocking effect on crude oil.

Specifically, a flow control valve 35 is arranged at the outlet of the dosing pump, and a second cut-off valve 36 is arranged at the inlet of the dosing pump.

It should be noted that the flow control valve can control the flow rate of the wax-removing and anti-wax agent delivered by the dosing pump to the injection mechanism. Different dosing volumes can be selected according to actual conditions. There is a second stop valve at the inlet of the dosing pump. When the pump fails, the dosing pump can be maintained by closing the second shut-off valve.

Specifically, the medicine storage mechanism 1 also includes a heating belt 12 wound on the medicine filling box.

It should be noted that when the weather is cold, the wax-removing and anti-wax agent is easy to solidify into a solid, so that it is impossible to add the drug to remove the wax. Wrapping a heating tape on the drug-dosing box can heat the drug-dosing box to avoid the wax-removing agent. Solidification, optional, a protective shell can also be added outside the dosing box.

Specifically, a pressure gauge 37 is provided at the outlet of the dosing pump.

It should be noted that the pressure gauge 37 can measure the pressure in the medicine delivery pipeline. When the pressure direction in the medicine delivery pipeline is the same as the direction of the medicine dosing box to the medicine injection mechanism, it means that the oil pressure in the oil pipe is normal and the medicine can be continued. When the direction of the pressure in the medicine delivery pipeline is opposite to the direction of the medicine dosing box towards the medicine injection mechanism, it means that the oil pressure in the oil pipe is too high and backflow has occurred, and it is necessary to close the valve 36 in time to prevent crude oil from flowing into the medicine dosing box and contaminating the medicine .

This embodiment provides a wellbore paraffin removal and dosing device, including a drug storage mechanism, a drug injection mechanism that penetrates into the oil pipe, and a delivery mechanism connected between the drug storage mechanism and the drug injection mechanism. The drug storage mechanism includes a drug storage mechanism, And provide the dosing box of the medicine to the injection mechanism at any time. The dosing box is fixed on the ground. The wellbore wax removal and dosing device can continuously inject the wax removal and anti-wax medicine into the oil pipe. The delivery mechanism also includes two spraying devices. The blowing device respectively includes a blowing pipeline connected with the outlet of the oil pipe, and a blowing valve and a pressure gauge are arranged on the blowing pipeline. When the oil pipe pressure is too high, the oil pipe can be sprayed in time to prevent the crude oil in the oil pipe from flowing back into the drug delivery pipeline.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (10)

1. A wellbore wax removal drug dosing device, characterized in that it includes a drug storage mechanism, a drug injection mechanism that penetrates into the inside of the oil pipe, and a delivery mechanism connected between the drug storage mechanism and the drug injection mechanism. The medicine mechanism includes a medicine adding box for storing medicine and providing the medicine to the medicine injection mechanism at any time, and the medicine adding box is fixed on the ground. 2. The wellbore wax removal and dosing device according to claim 1, characterized in that, the conveying mechanism also includes at least one blowout device, and each said blowout device includes a blowout blowout device communicated with the outlet of the oil pipe. pipeline, and the discharge and discharge pipeline is provided with a discharge and discharge valve and a pressure gauge. 3. The wellbore paraffin removal drug dosing device according to claim 1 or 2, characterized in that, the delivery mechanism includes a drug delivery pipeline and a drug dosing pump, and the drug dosing box and the drug injection mechanism pass through the The medicine delivery pipeline is connected, and the medicine adding pump is arranged between the medicine adding box and the medicine injection mechanism, and is used to drive the medicine to flow in the medicine delivery pipeline. 4. The wellbore paraffin removal and dosing device according to claim 3, wherein the drug injection mechanism includes a drug injection pipe, a drug injection valve and a weighted rod, and the drug injection pipe is connected to the drug delivery pipeline , the medicament injection valve is arranged on the drug injection tube, and the weighted rod is connected to the lower end of the drug injection tube. 5 . The wellbore wax removal and dosing device according to claim 4 , wherein a wax scraper is arranged between the medicine injection valve and the weighting rod. 5 . 6. The wellbore paraffin removal and dosing device according to claim 4, wherein a one-way valve is provided on the injection pipe, and the one-way valve is located between the medicine injection valve and the medicine delivery pipeline. Between, the conduction direction of the one-way valve is the direction in which the medicine in the medicine dosing box flows to the medicine injection mechanism. 7. The wellbore paraffin removal and dosing device according to claim 6, characterized in that at least one first stop valve is arranged on the upper end of the one-way valve on the drug delivery pipeline, and the first stop valve is located at the wellhead. Location. 8 . The wellbore paraffin removal device according to claim 3 , wherein a flow control valve is arranged at the outlet of the dosing pump, and a second stop valve is arranged at the inlet of the dosing pump. 9. The wellbore paraffin removal device according to claim 1 or 2, wherein the drug storage mechanism further comprises a heating belt wound on the drug dosing box. 10. The wellbore paraffin removal dosing device according to claim 3, characterized in that a pressure gauge is arranged at the outlet of the dosing pump.