Flushing fluid flushing efficiency detection device for well cementation
Technical Field
The utility model relates to a flush fluid performance detection device technical field, in particular to flush fluid washing efficiency detection device for well cementation.
Background
In the process of well cementation and completion construction, the virtual mud cakes attached to the well wall and the casing wall can seriously affect the quality of well cementation, so that the use of the pad fluid in the process of well cementation is an important means for improving the quality of well cementation. The well cementation pad fluid is divided into flushing fluid and spacer fluid; wherein, the flushing liquid can effectively dilute the drilling fluid and flush away the broken mud cakes attached to the well wall and the casing wall.
Currently, there is no uniform standard method for evaluating the flushing efficiency of the flushing liquid. The washing efficiency of the washing liquid is generally measured by a six-speed rotational viscometer in a laboratory, however, the method has the defect that the outer cylinder of the viscometer is provided with holes, so that the drilling liquid is adhered to the outer side and the inner side of the outer cylinder of the viscometer, and the quantitative calculation is difficult. The published patent CN203161216U discloses a quantitative simulation evaluation device for flushing efficiency of well cementing flushing fluid, which is improved by a rotational viscometer, but when the device detects the flushing efficiency of the flushing fluid, the drilling fluid is easy to be separated from the surface, and the flushing efficiency of the flushing fluid cannot be truly reflected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a well cementation is with flush fluid washing efficiency detection device that can solve above-mentioned defect and realize effectively reflecting the washing efficiency of flush fluid.
Therefore, the utility model discloses technical scheme as follows:
a flushing efficiency detection device of flushing fluid for well cementation comprises a motor, a rotating speed regulator, a frosted outer cylinder, a flushing fluid cup and a heating sleeve, wherein the motor, the rotating speed regulator, the frosted outer cylinder, the flushing fluid cup and the heating sleeve are arranged on a base; wherein the heating sleeve is sleeved on the outer side of the flushing liquid cup; an output shaft of the motor is connected with the rotating speed regulator through a transmission turntable and drives a transmission shaft of the rotating speed regulator to rotate; the frosted outer cylinder is a cylinder body with an opening at the top, and the outer side wall surface of the frosted outer cylinder is processed into a frosted surface with rough points of 20-50 meshes; the top end of the frosted outer barrel is connected with a transmission shaft of the rotating speed regulator through a conversion interface, so that the frosted outer barrel can be arranged in the flushing liquid cup in a suspended mode in the middle and rotates along with the transmission shaft.
Furthermore, the base comprises a chassis which is horizontally arranged, a bracket which is vertically fixed on one side of the chassis, a cross beam which is horizontally arranged and one side of which is fixed on the top end of the bracket, and a supporting plate which is horizontally arranged and one side of which is movably fixed on the bracket; the motor and the rotating speed regulator are arranged on the top surface of the cross beam, the transmission turntable is arranged in the cross beam, and the heating sleeve with the built-in flushing liquid cup is arranged on the supporting plate.
Furthermore, a strip-shaped through hole is formed in the support from top to bottom, a cylindrical plug-in capable of being mounted in the strip-shaped through hole in a penetrating mode is arranged in the middle of one side of the supporting plate, connecting external threads are arranged on the cylindrical plug-in, the supporting plate enables the supporting plate to be fixed at any height of the support by mounting the cylindrical plug-in the strip-shaped through hole in a penetrating mode and arranging an adjusting handle at the end portion of the cylindrical plug-in; the adjusting handle comprises a fixing nut arranged at the end part of the cylindrical plug-in piece and a handle arranged on the end face of the outer side of the fixing nut.
Further, the rotating speed regulator adopts a continuously variable transmission.
Furthermore, a rotating speed display connected with the rotating speed regulator is also arranged on the cross beam.
Compared with the prior art, the flushing efficiency detection device for the flushing fluid for well cementation simulates a downhole tubular column through the frosted outer cylinder arranged in the flushing fluid detection device, the flushing fluid cup simulates a sleeve, and the heating sleeve simulates downhole temperature to realize simulation of real working conditions close to a well wall, so that virtual cakes generated by the drilling fluid are closer to actual conditions; in addition, the rotational speed of the rotational viscometer can be adjusted by using a continuously variable transmission, and the rotational speed can be adjusted by actual conditions.
Drawings
FIG. 1 is a schematic structural view of the flushing efficiency detecting device of the flushing fluid for well cementation of the present invention;
FIG. 2 is a schematic structural view of a bracket of the flushing fluid flushing efficiency detecting device for well cementation according to the present invention;
fig. 3 is the utility model discloses a well cementation is with flush fluid washing efficiency detection device's structural schematic diagram of layer board.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
The flushing efficiency detection device for the flushing fluid for well cementation comprises a motor 4, a continuously variable transmission 6, a frosted outer cylinder 8, a flushing fluid cup 9 and a heating sleeve 10, wherein the motor 4, the continuously variable transmission 6, the frosted outer cylinder 8, the flushing fluid cup 9 and the heating sleeve 10 are arranged on a base; wherein,
as shown in fig. 1, the base comprises a chassis 1, a bracket 3, a beam 12 and a supporting plate 11; the chassis 1 is horizontally arranged on a horizontal table top, the support 3 is vertically arranged, the bottom end of the support is fixed at the middle position of the left side edge of the adjacent chassis 1, the cross beam 12 is horizontally arranged, and the left end of the cross beam is fixed at the top of the support 3; the supporting plate 11 is horizontally arranged and movably fixed on the bracket 3; specifically, the beam 12 is a hollow structure, and a transmission turntable 13 is arranged in the beam; as shown in fig. 2 to 3, a strip-shaped through hole 301 is formed in the bracket 3 from top to bottom, a cylindrical plug-in 1101 capable of being inserted into the strip-shaped through hole is arranged in the middle of one side of the supporting plate 11, a connecting external thread is arranged on the cylindrical plug-in 1101, the supporting plate 11 enables the supporting plate 11 to move up and down in the strip-shaped through hole 301 and be fixed at any height of the bracket 3 by inserting the cylindrical plug-in 1101 into the strip-shaped through hole 301 and arranging an adjusting handle 2 at the end of the cylindrical plug-in 1101; the adjustment handle 2 comprises a fixing nut arranged at the end of the cylindrical insert 1101 and a handle arranged on the outer end face of the fixing nut;
the motor 4 and the continuously variable transmission 6 are arranged on the top surface of the cross beam 12; an output shaft of the motor 4 is connected with the continuously variable transmission 6 through a transmission turntable 13 arranged in the cross beam 12, so that a transmission shaft 14 of the continuously variable transmission 6 is driven to rotate; meanwhile, a rotating speed display 5 connected with the continuously variable transmission 6 is also arranged on the cross beam 12 and used for displaying the real-time rotating speed of the transmission shaft 14; the transmission shaft 14 is sleeved with a conversion interface 7, the top end of the conversion interface 7 is welded and fixed on the outer wall of the transmission shaft 14, and the inner wall of the bottom end of the conversion interface 7 is provided with a connecting internal thread;
the frosted outer cylinder 8 is a cylinder body with an opening at the top, and the outer side wall surface of the frosted outer cylinder is processed into a frosted surface with the roughness of 50 meshes; the outer wall of the top end of the frosted outer cylinder 8 is provided with connecting external threads, so that the frosted outer cylinder 8 and the conversion interface 7 are in threaded connection and fixation, and the frosted outer cylinder 8 can rotate along with the transmission shaft 14;
the heating sleeve 10 is sleeved on the outer side of the flushing liquid cup 9 and is used for heating flushing liquid contained in the flushing liquid cup 9 and simulating the actual temperature of a shaft; the height of the heating sleeve 10 is higher than that of the flushing liquid cup, so that the height of the heating sleeve 10 is higher than the liquid level in the flushing liquid cup.
The use method of the flushing efficiency detection device for the well cementation flushing fluid comprises the following steps:
s1, weighing the mass W of the clean and dry frosted outer cylinder 80;
S2, connecting and fixing the frosted outer cylinder 8 with a transmission shaft through a conversion interface 7, and then pouring the drilling fluid into a flushing fluid cupThe pouring amount of the drilling fluid ensures that the frosted outer cylinder 8 can be completely immersed in the drilling fluid to be detected; then starting a power supply to set the rotating speed of the continuously variable transmission 6, enabling the frosted outer cylinder 8 to rotate in the flushing liquid cup according to the set rotating speed, simultaneously starting the heating sleeve 10 to heat to enable the flushing liquid to be heated to the simulated well temperature (namely according to the bottom circulation temperature, if the circulation temperature is higher than 90 ℃, the heating sleeve is set according to 90 ℃, or the heating target temperature is set according to the test temperature), continuing rotating for 30 minutes after the temperature is raised to the target temperature, closing the heating sleeve 10 and the motor 4, enabling the frosted outer cylinder to stop rotating, and adjusting the height of the supporting plate 11 through the adjusting handle 2 to enable the frosted outer cylinder 8 to be completely separated from the flushing liquid cup; after the drilling fluid on the outer frosted cylinder 8 is completely dripped out, the outer frosted cylinder 8 and the weight W of the drilling fluid adhered on the outer frosted cylinder 8 are weighed1;
S3, pouring the flushing fluid to be tested at a certain temperature into a clean flushing fluid cup 9, placing the flushing fluid to be tested at a testing position to enable the frosted outer cylinder 8 adhered with the drilling fluid to be completely immersed into the flushing fluid to be tested, starting a power supply to set the rotating speed of the continuously variable transmission 6, enabling the frosted outer cylinder 8 to rotate in the flushing fluid cup at the set rotating speed, enabling the drilling fluid adhered to the frosted outer cylinder 8 to be washed off in the rotating process, after a certain washing time, turning off the motor 4 and enabling the frosted outer cylinder to be completely separated from the flushing fluid cup 9, after the liquid on the frosted outer cylinder 8 is completely dripped, weighing the2;
S4, data W obtained in the steps S1-S30、W1And W2Substituting into a formula:
the washing efficiency eta of the washing liquid to be measured can be calculated.
The foregoing embodiments and description have been provided to illustrate the principles of the invention and, without departing from the spirit and scope of the invention, there are various changes and modifications that fall within the scope of the invention as claimed.