CN114059969B - A kind of oil casing dosing device - Google Patents

Abstract

The invention discloses a chemical dosing device for an oil casing, comprising: a casing, a pressure oil tank, a medicine box, a pipeline assembly and a crude oil heater, wherein the medicine box is connected to the pressure oil tank; The crude oil in the annular space is extracted into the tank, and the side of the pressure oil tank is connected to the oil inlet of the crude oil heater through the oil outlet pipe; the pipeline assembly includes a hot oil pipe, a mixing pipe and a control pipe, and the hot oil pipe and the mixing pipe are connected. To the casing, the other end of the hot oil pipe is connected with the oil outlet of the crude oil heater, and the other end of the mixing pipe is communicated with the hot oil pipe. The invention is based on the casing dosing device proposed by combining the oil casing dosing operation and the hot oil well flushing operation, and the hot oil circulation well flushing can be carried out through the dosing device, and the hot oil source is the crude oil extracted from the annular space, There is no need to use an oil truck, and there is no need to consume a large amount of other hot oil or heat carrier.

Description

A kind of oil casing dosing device

technical field

The invention relates to the technical field of oil extraction, in particular to a chemical dosing device for an oil casing.

Background technique

In the process of crude oil extraction, due to the changes of crude oil physical properties and production parameters, the inner wall of the oil pipe is prone to scaling and wax formation, which will not only cause damage to the oil layer and reduce production capacity, but also increase the frequency of oil well maintenance operations. Therefore, it is very important to reduce viscosity and remove wax by physical and chemical methods such as pipe washing and dosing.

In general, the dosing treatment is to add wax-removing and viscosity-reducing agents into the annular space between the casing and the oil pipe, enter the oil pipe through the pumping power, and remove the wax after reacting with the crude oil. Generally, dosing needs to manually open the casing flange, and directly pour a large amount of medicine into the casing at one time. The medicine accumulates on the dynamic liquid surface and does not fully react with the crude oil in a short period of time, and then it is drawn out by the sucker rod to the surface, which is not only wasteful but also increased. Crude oil impurities.

Thermal wax removal is the most common method to remove stubborn wax deposits by physical means on the basis of drug wax removal, and is suitable for oil wells with various oil recovery methods. Generally, thermal wax removal requires the help of oil trucks, circulating wells with hot oil or other heat carriers, and melting the wax out of the well, which requires a lot of hot oil, and the oil well needs to stop production during this period, which affects the production.

To sum up, there are problems such as low efficiency and large loss in the various methods of reducing viscosity, increasing production, and removing wax of oil pipes in oil wells.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a chemical dosing device for petroleum casing, so as to solve the above-mentioned problems in the background art.

To achieve the above object, the present invention provides the following technical solutions:

A chemical dosing device for oil casing, comprising: a pressure oil tank, a medicine box, a driving device, a pipeline assembly and a crude oil heater, the medicine box is connected to the pressure oil tank; the bottom end of the oil pressure tank is connected to the oil pressure tank through an oil extraction pipe Below the dynamic liquid level of the crude oil target layer in the casing, the oil pressure tank is used to extract the crude oil in the annular space of the casing into the tank, and the side of the pressure oil tank is connected to the oil inlet of the crude oil heater through the oil outlet pipe; the pipeline The assembly includes a hot oil pipe, a mixing pipe and a control pipe, the hot oil pipe and the mixing pipe are connected to the casing, the other end of the hot oil pipe is connected with the oil outlet of the crude oil heater, and the other end of the mixing pipe is communicated with the hot oil pipe, the The control pipe is communicated with the hot oil pipe and is coaxial with the pipe end of the mixing pipe, and a controller for controlling the on-off of the mixing pipe and keeping the hot oil pipe in the channel state is arranged in the control pipe.

As a further solution of the present invention: the oil pressure tank is provided with an oil sucking bowl, the top of the oil sucking bowl is fixedly connected with a first connecting rod group, and the top surface of the oil sucking bowl is provided with an oil outlet hole that communicates with the inside of the oil sucking bowl. The bottom surface of the oil bowl is provided with an oil inlet hole, and the oil inlet hole and the connection between the oil pressure tank and the oil suction pipe are respectively provided with an upstream moving valve and a downstream moving valve, both of which can slide up and down.

As a further solution of the present invention, the output end of the driving device is connected with a cam rocker mechanism, and the top end of the first link group is hinged with the cam rocker mechanism.

As a further solution of the present invention, the pipe end of the hot oil pipe is to the bottom end of the casing, and the pipe end of the mixing pipe is located close to the position below the dynamic liquid surface.

As a further solution of the present invention: the controller includes a second connecting rod group, a plunger and a ball plug, the plunger is arranged in the control pipe and is sealed with the control pipe, the diameter of the plunger and the ball plug are the same, and the ball plug The diameter is larger than the diameter of the mixing pipe, and the ball plug is provided with a through hole along the axial direction of the hot oil pipe.

As a further solution of the present invention: the bottom end of the second connecting rod group is connected to the plunger, and the top end is connected to a timing control device, and the timing control device includes a fixed seat, a crank, a slider and a cam, and the slider slides It is arranged on the fixed seat, two sets of protrusions are symmetrically arranged on the inner side of the slider, the cam is rotated and installed on the fixed seat and is located between the two sets of protrusions. It is connected to the other side of the fixed seat and connected to the cam rotating shaft, and a one-way bearing is arranged between the cam rotating shaft and the end of the crank is connected to the connecting rod driving assembly that swings synchronously with the cam rocker mechanism.

As a further solution of the present invention: the connecting rod driving assembly includes a driving rod, a connecting rod and a rotating sleeve, the rotating sleeve is rotatably arranged on the driving rod, the driving rod is fixedly connected with the cam swing rod assembly, and two parts of the connecting rod are fixedly connected. The ends are respectively connected with the turning sleeve and the crank.

As a further solution of the present invention, a sliding damping is provided between the sliding block and the fixed seat.

As a further solution of the present invention: the medicine box is connected to a medicine dosing device through a discharge pipe, and the medicine dosing device includes a third connecting rod group, a one-way valve, a filling pipe and a medicine pumping tank. A piston is provided, the piston is connected with the third connecting rod group, the third connecting rod group is connected with the driving rod, and the one-way valve is provided with two groups, which are respectively arranged on the discharge pipe and the filling pipe. The pipe and the filling pipe are respectively connected above the side of the medicine extraction tank, and the filling pipe is connected to the top position in the oil pressure tank.

As a further solution of the present invention: the end of the filling pipe is provided with a micronizing nozzle.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is based on the casing dosing device proposed by combining the oil casing dosing operation and the hot oil well flushing operation, and mainly includes the following advantages:

1. Hot oil circulation well flushing can be carried out through the dosing device. The source of hot oil is crude oil extracted from the annular space. It does not need to use oil trucks, nor does it need to consume a large amount of other hot oil or heat carrier, and it does not need to stop production of oil wells. The extracted crude oil is heated and sent back to the end of the oil pipe for mixing, so that the crude oil in the pipe is heated up, so as to keep the temperature in the pipe at a relatively high state, so that the wax substance in the crude oil is difficult to precipitate, and the effect of removing wax from the pipe wall is achieved;

2. The chemical viscosity reduction and wax removal can be carried out by automatic dosing on the dynamic liquid surface through the dosing device. Combined with the hot oil well washing operation, the viscosity reduction and wax removal of crude oil can be significantly improved. Catalytic promotion can speed up the reaction rate, and the dosing is intermittent and continuous small amount of filling, which reduces waste and avoids the unreacted reagents being drawn out of the surface to increase the amount of crude oil impurities;

3. The timing control device of the mechanical structure is set up to perform continuous automatic control of dosing and hot oil flushing. The mechanized structure has low cost and high stability, and is not easy to cause unreliable work due to the consistency of crude oil;

4. The timing control device, the oil pumping tank and the dosing device are all linked by the same drive system to realize the overall cyclic movement, reduce the use of equipment, and have high linkage drive efficiency.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention in one direction.

FIG. 2 is a schematic structural diagram of the present invention in another direction.

3 is a schematic diagram of the internal structure of the medium pressure oil tank of the present invention.

FIG. 4 is a schematic structural diagram of a pipeline assembly in the present invention.

FIG. 5 is an enlarged schematic view of the structure at A in FIG. 4 .

FIG. 6 is a schematic structural diagram of the controller in the present invention.

FIG. 7 is a schematic diagram of the front structure of the timing control device in the present invention.

FIG. 8 is a schematic diagram of the rear structure of the timing control device in the present invention.

FIG. 9 is a schematic structural diagram of the dosing device in the present invention.

In the figure, 1, casing; 12, oil pipe; 13, screen pipe; 14, flange seat; 2, oil pressure tank; 21, oil suction pipe; 22, first connecting rod group; 23, oil outlet pipe; 3, medicine box; 31, discharge pipe; 4, drive device; 41, cam swing lever mechanism; 5, timing control device; 51, fixed seat; 52, crank; 53, slider; 54, cam; 541, protrusion; 6 , dosing device; 61, the third connecting rod group; 62, one-way valve; 63, filling pipe; 64, pumping tank; 7, piping assembly; 71, hot oil pipe; 72, mixing pipe; 73, control pipe ; 8. Crude oil heater; 9. Connecting rod drive assembly; 91, Driving rod; 92, Connecting rod; 93, Turning sleeve; 10, Controller; 101, Second connecting rod group; 102, Plunger; 103, Ball Plug; 1031, through hole; 11, sucker bowl; 111, oil outlet; 112, upstream movable valve; 113, oil inlet; 114, downstream movable valve.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIGS. 1 to 3 , in an embodiment of the present invention, a chemical dosing device for oil casing includes: a pressure oil tank 2 , a medical tank 3 , a driving device 4 , a timing control device 5 , a dosing device 6 , and a pipeline assembly 7 and the crude oil heater 8, the bottom end of the oil pressure tank 2 is connected to the flange seat 14 through the oil suction pipe 21, the flange seat 14 is connected to the end of the casing 1, and the flange seat 14 is communicated with the inside of the casing 1, And the oil sucking pipe 21 is connected to the casing 1 to below the dynamic liquid level of the crude oil target layer; the oil pressure tank 2 is provided with an oil sucking bowl 11, and the top of the oil sucking bowl 11 is fixedly connected with a first connecting rod group 22, which is used for pumping. The top surface of the oil bowl 11 is provided with an oil outlet hole 111 that communicates with its interior, and the bottom surface of the oil bowl 11 is provided with an oil inlet hole 113. The oil inlet hole 113 and the connection between the oil pressure tank 2 and the oil extraction pipe 21 are respectively provided with upstream The dynamic valve 112 and the downstream dynamic valve 114 can both slide up and down. Specifically, the upstream and downstream dynamic valves are both slidably connected to the guide rail located at the bottom of the oil sucking bowl 11 and the oil pressure tank 2. On the rod, it can slide up and down along the guide rod; the driving device 4 is a deceleration motor, and the output end of the deceleration motor is connected with a cam swing lever mechanism 41, and the deceleration motor can drive the cam swing lever mechanism 41 to reciprocate and swing, and the first link The top of the group 22 is hinged with the cam swing lever mechanism 41. When the cam swing lever mechanism 41 swings back and forth, it will drive the first link group 22 to move, thereby driving the oil sucking bowl 11 to move back and forth in the oil pressure tank 2. When the oil sucking bowl 11 is on the When moving, the upstream valve 112 will close the oil inlet hole 113, and the downstream valve 114 will be opened under the action of pumping pressure, the crude oil in the casing 1 will enter the oil pressure tank 2 through the pumping pipe 21 under the pumping pressure, and at the same time The crude oil can be extracted more easily by using the gas pressure of the natural gas in the casing 1, and then the sucking bowl 11 is moved down. At this time, the opening and closing of the upstream and downstream valves are reversed, the downstream valve 114 is closed, and the upstream valve 112 is under oil pressure. Open downward, so that the crude oil enters the sucking bowl 11 through the oil inlet hole 113 and flows into the top of the oil pressure tank 2 through the oil outlet hole 111, thereby realizing the extraction of the crude oil in the pipe;

An oil outlet pipe 23 is connected to the side of the oil pressure tank 2 , and the oil outlet pipe 23 is connected to the oil inlet of the crude oil heater 8 .

4 to 6, the pipeline assembly 7 includes a hot oil pipe 71, a mixing pipe 72 and a control pipe 73. The hot oil pipe 71 and the mixing pipe 72 are connected to the casing 1, wherein the pipe end of the hot oil pipe 71 is connected to the casing 1. The bottom end is near the screen pipe 13, the pipe end of the mixing pipe 72 is located close to the position below the dynamic liquid surface, the other end of the hot oil pipe 71 is connected to the oil outlet of the crude oil heater 8, and the other end of the mixing pipe 72 is communicated with the hot oil pipe 71 , the control pipe 73 is communicated with the hot oil pipe 71 and is coaxial with the pipe end of the mixing pipe 72 , the control pipe 73 is provided with a controller 10 , and the controller 10 includes a second connecting rod group 101 and a plunger 102 and the ball plug 103, the plunger 102 is arranged in the control pipe 73 and is sealed with the control pipe 73, the diameter of the plunger 102 and the ball plug 103 are the same, and the diameter of the ball A through hole 1031 is provided along the axial direction of the hot oil pipe 71;

As shown in Figures 7 and 8, the bottom end of the second connecting rod group 101 is connected to the plunger 102, and the top end is connected to the timing control device 5. The timing control device 5 includes a fixed seat 51, a crank 52, a slider 53 and a cam 54. The slider 53 is slidably arranged on the fixed seat 51, and there is a sliding damping between the slider 53 and the fixed seat 51, that is, the slider 53 can stop at any position within the sliding stroke without external force and will not slide autonomously , the inner side of the slider 53 is symmetrically provided with two sets of protrusions 541, the cam 54 is rotatably installed on the fixed seat 51 and is located between the two sets of protrusions 541, the cam 54 can be in contact with the protrusions 541 on both sides respectively during the rotation process, the said The crank 52 is rotatably connected to the other side of the fixed seat 51 and is connected to the rotating shaft of the cam 54, and a one-way bearing is arranged between the crank 52 and the rotating shaft of the cam 54. The end of the crank 52 is connected to the connecting rod driving assembly 9. Specifically, the connecting rod drives the The assembly 9 includes a driving rod 91, a connecting rod 92 and a rotating sleeve 93, the rotating sleeve 93 is rotatably arranged on the driving rod 91, the driving rod 91 is fixedly connected with the cam swing rod assembly 41, and the two ends of the connecting rod 92 are respectively connected with The rotating sleeve 93 is connected with the crank 52, and when the cam swing lever assembly 41 swings, the drive rod 91 is driven to move synchronously, thereby driving the crank 52 to swing back and forth through the connecting rod 92, and the swinging crank 52 uses a one-way bearing to make the cam 54 move in only one direction. Inward rotation, the rotating cam 54 will drive the sliding block 53 to move. After the cam 54 contacts the protrusion 541, the sliding block 53 can be sent to the stroke end position within one stroke cycle of the crank 52. The sliding block 53 and the second connecting rod group 101 is connected, when the second connecting rod group 101 moves up, the ball plug 103 is pulled into the control tube 73, at this time the mixing tube 72 is opened, and the crank 52 drives the cam 54 to rotate a certain angle in one stroke. After a certain time interval, the cam 54 contacts the protrusion 541 on the other side and sends the ball plug 103 into the hot oil pipe 71 again to block the mixing pipe 72 , and the crude oil can flow into the hot oil pipe 71 through the through hole 1031 .

As shown in FIG. 9 , the medicine box 3 contains the configured viscosity reducing agent, wax remover, etc. The medicine box 3 is connected to the medicine dosing device 6 through the discharge pipe 31 , and the medicine dosing device 6 includes a third connecting rod group. 61. One-way valve 62, filling pipe 63 and medicine pumping tank 64, a piston is arranged in the medicine pumping tank 64, the piston is connected with the third connecting rod group 61, and the third connecting rod group 61 is connected with the driving rod 91. There are two sets of the one-way valve 62, which are respectively arranged on the discharge pipe 31 and the filling pipe 63. The injection pipe 63 is connected to the top position of the oil pressure tank 2. The driving rod 91 drives the piston to move through the third connecting rod group 61. When the piston moves down, the one-way valve 62 on the discharge pipe 31 is opened, and the one-way valve on the filling pipe 63 is opened. The valve 62 is disconnected, so that the medicine is pumped into the medicine pumping tank 64. When the piston moves up, in the same way, the one-way valve 62 is turned on and off, and the medicine liquid is pressed into the filling pipe 63 and sent into the pressure oil tank 2 to be mixed with the crude oil. , in order to improve the mixing uniformity, a micronizing nozzle can be arranged at the end of the filling pipe 63 to finely spray the medicine, so as to improve the mixing reaction efficiency.

Combined with the above, the crude oil is pumped out and fed into the oil pressure tank 2, and the medicines prepared in the medicine tank 3 are simultaneously sent to the oil pressure tank 2 through the dosing device 6 to be mixed with the crude oil, and then the crude oil is pressed into the crude oil heater 8. Heating to make it warm to 65-80°, and then sent into the hot oil pipe 71, if the mixing pipe 72 is blocked, the crude oil will be pressed into the hot oil pipe 71 and sent to the bottom of the casing 1, mixed with the crude oil, and the crude oil will be pumped through the pump. The oil pressure is quickly sent into the oil pipe 12 through the screen pipe 13, so that the inner wall of the oil pipe 12 is dewaxed with hot oil, and the wax layer is melted and brought out of the surface to realize thermal well flushing; through the timing control of the timing control device 5, it can be switched At the outflow position of the hot oil, after the mixing pipe 72 is opened, the hot oil automatically flows into the mixing pipe 72 and is sent under the dynamic liquid surface, and the crude oil mixed with the viscosity reducer and the wax remover enters the pipe and reacts with the crude oil, which can reduce the viscosity of the crude oil and improve its performance. The production and chemical reaction reduce the wax, and the hot oil can also reduce the viscosity of the crude oil by heating up the crude oil. Considering the viscosity of the crude oil, the electronically controlled valve is not easy to achieve the effect and is prone to failure. Through the timing control of the mechanical structure, the hot oil washing On the basis of the well, the effect of intermittently adding chemicals to the dynamic liquid surface of the target layer, the combination of the two can achieve the ideal effect of reducing viscosity and controlling wax.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. An oil casing medicating device, comprising: the device comprises a sleeve (1), a pressure oil tank (2), a medicine box (3), a driving device (4), a pipeline assembly (7) and a crude oil heater (8), wherein the medicine box (3) is connected to the pressure oil tank (2); the method is characterized in that: the bottom end of the oil pressing tank (2) is connected to the position below the working fluid level of a crude oil target layer in the sleeve (1) through an oil pumping pipe (21), the oil pressing tank (2) is used for pumping crude oil in an annular space of the sleeve (1) into the tank, and the side surface of the oil pressing tank (2) is connected to an oil inlet of the crude oil heater (8) through an oil outlet pipe (23);

the output end of the driving device (4) is connected with a cam oscillating bar mechanism (41);

the pipeline assembly (7) comprises a hot oil pipe (71), a mixing pipe (72) and a control pipe (73), the hot oil pipe (71) and the mixing pipe (72) are connected into the casing pipe (1), the other end of the hot oil pipe (71) is connected with an oil outlet of the crude oil heater (8), the other end of the mixing pipe (72) is communicated with the hot oil pipe (71), the pipe end of the hot oil pipe (71) is connected to the bottom end of the casing pipe (1), the pipe end of the mixing pipe (72) is located at a position close to the lower part of a working fluid level, the control pipe (73) is communicated with the hot oil pipe (71) and is coaxial with the pipe end of the mixing pipe (72), and a controller (10) used for controlling the on-off of the mixing pipe (72) and keeping the hot oil pipe (71) in a passage state is arranged in the control pipe (73);

the controller (10) comprises a second connecting rod group (101), a plunger (102) and a ball plug (103), the plunger (102) is arranged in the control tube (73) and sealed with the control tube (73), the diameters of the plunger (102) and the ball plug (103) are the same, the diameter of the ball plug (103) is larger than that of the mixing tube (72), and a through hole (1031) in the axial direction of the hot oil tube (71) is formed in the ball plug (103);

second connecting rod group (101) bottom is connected with plunger (102), and the top is connected on slider (53) on timing control device (5), timing control device (5) are including fixing base (51), crank (52), slider (53) and cam (54), slider (53) slide to be set up on fixing base (51), and slider (53) inboard symmetry is provided with two sets of archs, and cam (54) rotate to be installed on fixing base (51) and lie in between two sets of archs, crank (52) rotate to be connected in fixing base (51) another side and be connected with cam (54) pivot to set up one-way bearing in the pivot with cam (54), crank (52) end connection to with cam pendulum rod mechanism (41) synchronous swing motion's connecting rod drive assembly (9).

2. The petroleum casing pipe dosing device of claim 1, wherein: be provided with in the pressure oil tank (2) and take out oil bowl (11), the first connecting rod group (22) of oil bowl (11) top fixedly connected with is provided with oil outlet (111) rather than inside intercommunication on the top surface of oil bowl (11), and oil bowl (11) bottom surface is provided with inlet port (113), inlet port (113) and pressure oil tank (2) are provided with respectively with the punishment of taking out oil pipe (21) and move valve (112) and lower traveling valve (114) on going up, move valve (112) and lower traveling valve (114) homoenergetic and slide from top to bottom.

3. The petroleum casing pipe dosing device of claim 2, wherein: the top end of the first connecting rod group (22) is hinged with the cam oscillating bar mechanism (41).

4. The petroleum casing pipe dosing device of claim 1, wherein: the connecting rod driving assembly (9) comprises a driving rod (91), a connecting rod (92) and a rotating sleeve (93), the rotating sleeve (93) is rotatably arranged on the driving rod (91), the driving rod (91) is fixedly connected with the cam oscillating bar mechanism (41), and two ends of the connecting rod (92) are respectively connected with the rotating sleeve (93) and the crank (52).

5. The petroleum casing pipe dosing device of claim 1, wherein: and sliding damping is arranged between the sliding block (53) and the fixed seat (51).

6. The petroleum casing chemical dosing device of claim 4, wherein: medicine adding device (6) is connected through discharging pipe (31) in medical kit (3), medicine adding device (6) include third connecting rod group (61), check valve (62), filling pipe (63) and draw medicine jar (64), draw and set up the piston in medicine jar (64), the piston is connected with third connecting rod group (61), actuating lever (91) is connected in third connecting rod group (61), check valve (62) set up two sets ofly, set up respectively on discharging pipe (31) and filling pipe (63), discharging pipe (31) and filling pipe (63) are connected respectively in medicine jar (64) side top of drawing, top position in filling pipe (63) are connected to pressure oil jar (2).

7. The petroleum casing chemical dosing device of claim 6, wherein: the end of the filling pipe (63) is provided with a micronizing nozzle.

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