CN216560146U - Digital display type drilling fluid density measuring device - Google Patents

Abstract

The utility model relates to a digital display type drilling fluid density measuring device which comprises a lever main ruler, wherein a mud cup is fixedly arranged at the left end of the lever main ruler, a balance cylinder is fixedly arranged at the right end of the lever main ruler, a main cutting edge is arranged on the left side of the middle part of the lever main ruler, a supporting seat main cutting edge is arranged on the lower portion of the main cutting edge, a supporting seat is arranged on the lower portion of the supporting seat main cutting edge, and a digital display playing the role of a weight is movably sleeved on the right side of the middle part of the lever main ruler. The utility model has the advantages of reasonable structural design, convenient and quick use, automatic reading, high measurement precision, difficult error generation during measurement, time and labor saving and consideration of the advantages of unequal arm type densimeters and platform scale type densitometers.

Description

Digital display type drilling fluid density measuring device

Technical Field

The utility model relates to a well fluid density measuring device, in particular to a digital display type drilling fluid density measuring device.

Background

In drilling engineering, the drilling fluid density refers to the mass of drilling fluid per unit volume, and the drilling density is an important parameter for ensuring safe and rapid drilling and protecting hydrocarbon reservoirs. Through the change of the density of the drilling fluid, the hydrostatic column pressure of the drilling fluid in the well casing can be adjusted to balance the pore pressure of the stratum. And sometimes to balance formation stresses to avoid collapse. If the density is too high or too low, the performance of the drilling fluid is unstable, the drilling rate is reduced, the damage to an oil-gas layer is aggravated, the cost of the drilling fluid is increased, and the like. Therefore, in the drilling engineering design of a well, the density ranges of drilling fluid in different well sections must be accurately and reasonably determined, and the density ranges must be detected and adjusted at any time during the drilling process.

At present, drilling fluid density is mostly measured by adopting an unequal-arm lever type specific gravity balance in drilling engineering, and the specific operation steps comprise that firstly, a drilling fluid cup is filled with the drilling fluid, a cup cover is covered, and then, cotton yarns are used for wiping off the drilling fluid overflowing from a small hole of the cup cover. And then placing the knife edge of the density balance on a knife pad of the base, and continuously moving the floating weight until the horizontal bubble is positioned at the center of the two lines, wherein the scale on the left side of the floating weight represents the density of the measured drilling fluid. The publication No. CN 110658105A discloses a drilling fluid parameter measuring device, which comprises a drilling fluid density measuring part, and a gravity sensor is adopted to measure the drilling fluid density in a Markov funnel. Publication No. CN 102454374 a discloses a digital display drilling fluid densitometer, which conducts and displays the drilling fluid density by using a pressure sensor, and is not common in field application of drilling engineering. Also, CN 21351674U discloses a liquid density meter, which is a device for measuring the density of liquid by using components such as a pressure sensor, a glass weight, and a display screen, and most of the liquid density meters on the market at present are the liquid density meters.

The unequal-arm lever type drilling fluid densimeter needs manual reading of readings, is low in measurement precision, easily produces certain errors in reading measurement, and wastes time and labor. In the drilling fluid density measuring part disclosed in the publication No. CN 110658105A, the drilling fluid density is measured in a Markov funnel, and the possibility of drilling fluid dripping and inaccurate density measurement exists. The densimeter introduced in the publication number CN 102454374A is not easy to carry, is afraid of falling, has poor anti-interference capability, has certain limitation under the field use condition, and cannot ensure the precision required by the measurement. The publication No. CN 21351674U discloses a liquid density meter, which is fragile, afraid of collision and possibly inaccurate in measurement by using a glass weight.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a digital display type drilling fluid density measuring device which can automatically read the reading, has high measuring precision, is not easy to generate errors during measurement, and is time-saving and labor-saving.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a digital display drilling fluid density measuring device, includes the lever main scale, the fixed mud cup that is provided with of lever main scale left end department, the fixed balance section of thick bamboo that is provided with of lever main scale right-hand member, lever main scale middle part is provided with the main cutting edge on a left side, the main cutting edge lower part is provided with the main edge of a knife of supporting seat, the main edge of a knife lower part of supporting seat is provided with the supporting seat, the cover of the activity of the right side department in lever main scale middle part is equipped with the digital display who plays the weight effect.

According to the scheme, the upper part of the main blade is provided with the horizontal bubble.

According to the scheme, the fixing nut is arranged on the upper portion of the digital display, the zeroing key is arranged on the upper portion of the surface of the digital display, the digital display screen is arranged in the middle of the digital display, and the number of the memory pens is arranged on the left side of the digital display screen.

According to the scheme, the lower part of the digital display is sequentially provided with an on-off key, a memory symbol and a battery cover from left to right, and the rear part of the battery cover is provided with a battery.

According to the scheme, the upper part of the balance cylinder is provided with the plug.

According to the scheme, a single chip microcomputer is arranged in the digital display, and the type of the single chip microcomputer is AT Mega 8.

According to the scheme, the interface type of the mathematical display is RS485 or RS 232.

According to the scheme, the voltage of the battery is 1.2V, wherein the battery is a button battery.

According to the scheme, the mud cup cover is arranged on the upper portion of the mud cup.

The digital display type drilling fluid density measuring device has the following beneficial effects:

1. the utility model has the function of digital display, improves the original code into a digital display type reading dial and simultaneously takes the function of the code into consideration, realizes automatic display during the reading of the drilling fluid densimeter, and has more accurate detection result closer to the true value.

2. According to the utility model, the interaction of the fixed grid and the movable grid is adopted, and after the calculation of the chip, the reading can be accurate to a thousandth position, so that the reading accuracy is improved.

3. The device is provided with the memory key, has a memory function, is convenient to trace the previous measurement result, provides convenience in repeated tests and multi-group test processes, can trace the results of the previous ten measurement values in a power-off state, and has memory value symbols MR, memory pen numbers and measurement values on a screen.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural diagram of a digital display type drilling fluid density measuring device of the utility model.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in figure 1, the digital display type drilling fluid density measuring device comprises a lever main ruler 6, a mud cup 1 is fixedly arranged at the top end of the left side of the lever main ruler 6, and a mud cup cover 2 is arranged at the upper part of the mud cup 1. A balance cylinder 8 is fixedly arranged at the top end of the right side of the lever main ruler 6, and a plug 7 is arranged at the upper part of the balance cylinder 8.

A main blade 4 is arranged on the left side of the middle of a lever main ruler 6, a horizontal bulb 3 is arranged on the upper portion of the main blade 4, a supporting seat main blade 10 is arranged on the lower portion of the main blade 4, and a supporting seat 9 is arranged on the lower portion of the supporting seat main blade 10. The digital display 5 which plays the role of a weight is movably sleeved at the position, which is slightly to the right, in the middle of the lever main ruler 6, and the digital display 5 can freely slide on the lever main ruler 6. The digital display 5 is internally provided with a singlechip, and the model of the singlechip is AT Mega 8. The interface type of the math display 5 is RS485 or RS 232.

When the digital display 5 is used for measuring the density of the drilling fluid, the measurement of the density of the drilling fluid is realized when the whole lever system reaches balance. The horizontal bubble 3 that sets up on lever main scale 6, when the lever is balanced, horizontal bubble 3 is placed in the middle, and the fulcrum when the main cutting edge 4 reaches the balance with supporting seat owner edge 10 for whole lever, and the supporting seat 9 that sets up below lever main scale 6 plays the effect of supporting the lever.

The upper part of the digital display 5 is provided with a fixing nut 14, and the fixing nut 14 is used for fastening the digital display 5 and determining the flexibility of the digital display 5 moving on the lever main scale 6. The upper part of the surface of the digital display 5 is provided with a zeroing key 13, the middle part of the digital display 5 is provided with a digital display screen 15, and the left side of the digital display screen 15 is provided with a memory pen number 18. The lower part of the digital display 5 is provided with an on-off key 16, a memory symbol 17 and a battery cover 12 in sequence from left to right. The battery is arranged at the rear part of the battery cover 12, the battery is a button battery, and the voltage is 1.2V. The memory key 16 provides ten sets of memories, and in the power-off state, the results of the previous ten measured values can be tracked, and the memory value symbol MR, the memory stroke number 18 and the measured value appear on the screen. The ruler body of the density measuring device is provided with a high-precision rack, the rack operates to drive the circular grid sheet to rotate, and the weight, namely the display device, is matched with the photoelectric pulse counting principle to convert the displacement into a pulse signal. The receiver drives a normally open circuit to push the integrated circuit to work, and a clear button at the upper left part can drive the integrated circuit to be in a '0' state.

Table 1 digital display type drilling fluid density measuring device main technical parameter

The digital display type drilling fluid density measuring device is used as follows:

the method comprises the steps of filling drilling fluid in a mud cup 1, covering a mud cup cover 2, wiping the drilling fluid overflowing from a small hole of the mud cup cover 2 with cotton yarn, placing a main knife edge 10 of a supporting seat on a knife pad supporting seat 9 of a base, pressing a switch key 16, transmitting an electric signal to a single chip microcomputer, displaying a starting state on a display screen through the single chip microcomputer, continuously moving a sliding weight on a lever main scale 6 until a horizontal bubble 3 is located in the center of two lines, forming an electric signal by adopting interaction of a fixed grid and a movable grid, transmitting the electric signal to a digital display dial plate through calculation of the single chip microcomputer, and displaying a number on a digital display screen 15 to indicate the measured density of the drilling fluid. In the power-off state, the memory key 16 is pressed to trace the results of the previous ten measurements, and the memory value symbol MR, the number of memory strokes 18, the measurement value and the like appear on the screen.

Example (b):

1. 5 drilling fluids to be detected:

1) bentonite base slurry special for fresh water OCMA grade drilling fluid,

2)5 percent of saturated saline water-based slurry,

3) saturated brine well slurry: taking a well with the number of 12 inclined-3 wells and the depth of 2662 meters, wherein the salt content is 309010.54mg/L, the well temperature is 57 ℃, the pH value is 8.5,

4) polysulfonate drilling fluid system slurry: drilling at the well head strain 1201 inclined side with the well depth of 3220 m, the salt content of 277815.19mg/L, the well temperature of 63 ℃ and the pH value of 9,

5) polyamine drilling fluid system well slurry: taking a well with the depth of 905 m from the King 3 of the well number, the salt content of 289699.24mg/L, the well temperature of 45 ℃ and the pH value of 9.

The test method comprises the following steps:

1. the detection method of five embodiments adopts the measuring device to carry out measurement,

2. the five comparative example detection methods are measured by using an unequal arm type densitometer on a drilling site.

TABLE 2 Bentonite content of comparative and examples

The results show that: when the digital display type drilling fluid density measuring device is used for detecting the drilling fluid density, the detection result is more accurate, and the detection result of the drilling fluid density provided by the embodiment is closer to the real value.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (9)

1. The utility model provides a digital display drilling fluid density measuring device, its characterized in that, includes the lever main scale, the fixed mud cup that is provided with of lever main scale left end department, the fixed balanced section of thick bamboo that is provided with of lever main scale right-hand member, lever main scale middle part is provided with the main cutting edge to a left side, the main cutting edge lower part is provided with the main edge of a knife of supporting seat, the main edge of a knife lower part of supporting seat is provided with the supporting seat, the cover of the activity of the main scale middle part to a right side department of lever is equipped with the digital display who plays the weight effect.

2. The digital display drilling fluid density measuring device according to claim 1, wherein the upper part of the main cutting edge is provided with a horizontal bubble.

3. The digital display type drilling fluid density measuring device according to claim 1, wherein a fixing nut is arranged on the upper portion of the digital display, a zeroing key is arranged on the upper portion of the surface of the digital display, a digital display screen is arranged in the middle of the digital display, and the number of memory pens is arranged on the left side of the digital display screen.

4. The digital display type drilling fluid density measuring device according to claim 1, wherein the lower part of the digital display is provided with an on-off key, a memory symbol and a battery cover from left to right in sequence, and the rear part of the battery cover is provided with a battery.

5. The digital display type drilling fluid density measuring device according to claim 1, wherein a plug is arranged at the upper part of the balance cylinder.

6. The digital display type drilling fluid density measuring device according to claim 1, wherein a single chip microcomputer is arranged in the digital display, and the single chip microcomputer is AT Mega 8.

7. The digital display drilling fluid density measuring device of claim 1, wherein the interface type of the digital display is RS485 or RS 232.

8. The digital display drilling fluid density measuring device of claim 4, wherein the battery is a button cell battery and the voltage is 1.2V.

9. The digital display type drilling fluid density measuring device according to claim 4, wherein a mud cup cover is arranged on the upper portion of the mud cup.

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