Automatic cuttings sampling device and automatic sampling method

Abstract

The invention discloses an automatic rock cuttings sampling device and a sampling method, comprising a mounting frame installed on the top of an elevated trough, a rotating cylinder installed on the mounting frame, a vertical guide rod cylinder installed on the rotating axis of the rotating cylinder, a vibration motor installed on the guide rod cylinder, a cylinder rod of the guide rod cylinder can be extended downward into the elevated trough, a bracket is installed at the bottom of the cylinder rod of the guide rod cylinder, a filter box is hingedly installed at the bottom of the bracket, the top, front and rear of the filter box are opened, and a filter screen is installed on the rear opening; a sand receiving box trough is installed on the elevated trough adjacent to the mounting frame, a push rod cylinder is installed at one end of the sand receiving box trough, a blocking rod opposite to the guide rod cylinder is installed on the side of the sand receiving box storage chamber, and the cylinder rod of the push rod cylinder is extended to push the sand receiving box that falls into the sand receiving box trough at the bottom of the sand receiving box storage chamber along the sand receiving box trough to the bottom of the blocking rod. The automatic rock cuttings sampling device disclosed in the present invention is small in size, light in weight, and flexible in installation. It can provide accurate analysis samples for geological analysis at the drilling site and provide strong support for formation evaluation and oil and gas exploration.

Description

Technical Field

[0001] The invention belongs to the field of petroleum engineering exploration, and in particular relates to an automatic rock cuttings sampling device and an automatic sampling method in the field. Background Art

[0002] In the process of oil exploration, the analysis of rock cuttings returned from the bottom of the well is an important basis for evaluating the formation and finding oil and gas reservoirs. At present, the sampling of rock cuttings at home and abroad is still done manually. The accuracy and timeliness of sampling cannot be guaranteed under fast drilling conditions, which can no longer meet the current drilling needs. The analysis results obtained from wrong geological samples not only cannot guide oil exploration, but may also cause serious misleading, restricting the development of oil exploration technology.

[0003] The existing automatic cuttings sampling device has a complex mechanical transmission structure and is prone to failure under harsh environmental conditions on site. It is large in size and weight, and will affect other drilling operations after installation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an automatic cuttings sampling device and an automatic sampling method.

[0005] The present invention adopts the following technical solution:

[0006] A rock chip automatic sampling device, the improvement of which is as follows: it comprises a mounting frame mounted on the top of an elevated trough, a rotating cylinder mounted on the mounting frame, a vertical guide rod cylinder mounted on the rotating shaft of the rotating cylinder, a vibration motor mounted on the guide rod cylinder, the cylinder rod of the guide rod cylinder can extend downward into the elevated trough, a bracket is mounted at the bottom of the cylinder rod of the guide rod cylinder, a filter box is hingedly mounted at the bottom of the bracket, the top, front and rear of the filter box are opened, and a filter screen is installed on the rear opening; a sand receiving box is installed on the elevated trough adjacent to the mounting frame A slot is provided at one end of the sand receiving box slot, a sand receiving box storage chamber is installed at the top of the sand receiving box slot, sand receiving boxes are stacked in the sand receiving box storage chamber, an opening is provided at the bottom of the sand receiving box storage chamber for the sand receiving box to fall into the sand receiving box slot, and a gap is reserved between the bottom of the sand receiving box storage chamber and the sand receiving box slot for the sand receiving box to pass through, a stopper rod opposite to the guide rod cylinder is installed on the side of the sand receiving box storage chamber, and the cylinder rod of the push rod cylinder can be extended to push the sand receiving box that falls into the sand receiving box slot at the bottom of the sand receiving box storage chamber along the sand receiving box slot to the bottom of the stopper rod.

[0007] Furthermore, the width of the mounting frame is adjustable.

[0008] Furthermore, the installation position of the guide rod cylinder on the rotating shaft of the rotating cylinder can be adjusted up and down.

[0009] Furthermore, the left and right sides of the filter box are hinged to the inner side surfaces of the left and right sides of the bracket respectively.

[0010] Furthermore, when the device is in use, the front opening of the filter box is opposite to the mud flow direction in the elevated tank.

[0011] Furthermore, the height of the blocking rod is slightly higher than the height of the hinged joint between the filter box and the bracket after the guide rod cylinder rotates to a horizontal and slightly upward position.

[0012] Furthermore, the rotary cylinder, guide rod cylinder, vibration motor and push rod cylinder in the device all work according to the instructions of the host computer.

[0013] A method for automatic sampling of rock cuttings, using the above-mentioned device, the improvement of which lies in that: after the device is installed in place and activated, the cylinder rod of the push rod cylinder extends out, and the empty sand box that falls from the bottom of the sand box storage chamber into the sand box slot is pushed along the sand box slot to the bottom of the blocking rod, and the cylinder rod of the push rod cylinder retracts; the cylinder rod of the guide rod cylinder extends downward to immerse the filter box in the mud flow in the elevated tank, and the mud flows in from the front opening of the filter box and flows out from the rear opening, and the rock cuttings in the mud are blocked in the filter box by the filter screen on the rear opening; after the rock cuttings are collected, the cylinder rod of the guide rod cylinder retracts, and the filter box is lifted above the mud flow, and the vibration motor is started to vibrate and separate the rock cuttings and mud in the filter box; the rotating shaft of the rotating cylinder drives the guide rod cylinder to rotate to a horizontal and slightly upward position, at which time the front opening of the filter box faces upward The rear opening faces downward; the cylinder rod of the guide rod cylinder extends forward, the bottom of the filter box collides with the stop rod and then turns up around the bracket, and the vibration motor vibrates the rock cuttings from the top opening of the filter box into the sand receiving box in the sand receiving box groove at the bottom of the stop rod; turn off the vibration motor, the cylinder rod of the guide rod cylinder retracts backward, and the cylinder rod of the push rod cylinder extends out, and pushes the empty sand receiving box that falls from the bottom of the sand receiving box storage chamber into the sand receiving box groove along the sand receiving box groove to the bottom of the stop rod, and the empty sand receiving box pushes the sand receiving box previously filled with rock cuttings forward along the sand receiving box groove in sequence; the rotating shaft of the rotating cylinder drives the guide rod cylinder to rotate to a vertical position, at this time the front opening of the filter box faces forward, and the rear opening faces backward, and the cylinder rod of the guide rod cylinder extends downward, immersing the filter box in the mud flow in the elevated trough, and repeats the above steps again after collecting the rock cuttings again for automatic sampling.

[0014] The beneficial effects of the present invention are:

[0015] The automatic rock cuttings sampling device disclosed in the present invention is small in size, light in weight, and flexible in installation. It can provide accurate analysis samples for geological analysis at the drilling site and provide strong support for formation evaluation and oil and gas exploration.

[0016] The automatic rock cuttings sampling method disclosed in the present invention is stable and reliable in operation, can replace the manual operation mode of collecting rock cuttings, reduces labor intensity, and improves the timeliness and accuracy of rock cuttings sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a schematic structural diagram of the automatic cuttings sampling device disclosed in Example 1 of the present invention;

[0018] Figure 2(a)-2(d) It is a process schematic diagram of the automatic rock cuttings sampling method disclosed in Example 1 of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. For example, the guide rod cylinder and the rotary cylinder in this embodiment can also be replaced by an electric drive solution.

[0020] Embodiment 1, as Figure 1 As shown, this embodiment discloses an automatic rock cuttings sampling device, including a mounting frame 5 mounted on the top of an elevated trough 1, a rotating cylinder 4 mounted on the mounting frame, a vertical guide rod cylinder 3 mounted on the rotating axis of the rotating cylinder, a vibration motor 6 mounted on the guide rod cylinder, the cylinder rod of the guide rod cylinder can extend downward into the elevated trough, a bracket 12 is mounted at the bottom of the cylinder rod of the guide rod cylinder, a filter box 2 is hingedly mounted at the bottom of the bracket, the top, front and rear of the filter box are opened, and a filter screen 11 is installed on the rear opening; a connection is installed on the elevated trough adjacent to the mounting frame A sand box groove 13, a push rod cylinder 7 is installed at one end of the sand box groove, a sand box storage chamber 8 is installed on the top of the sand box groove, and sand boxes 10 are stacked in the sand box storage chamber. An opening is opened at the bottom of the sand box storage chamber for the sand box to fall into the sand box groove, and a gap is reserved between the bottom of the sand box storage chamber and the sand box groove for the sand box to pass through. A stop rod 9 is installed on the side of the sand box storage chamber opposite to the guide rod cylinder. The cylinder rod of the push rod cylinder can be extended to push the sand box that falls into the sand box groove at the bottom of the sand box storage chamber along the sand box groove to the bottom of the stop rod.

[0021] In this embodiment, the width of the mounting frame is adjustable to accommodate elevated troughs of different widths. The mounting position of the guide rod cylinder on the rotating shaft of the rotary cylinder can be adjusted up and down to accommodate elevated troughs of different depths. The left and right sides of the filter box are hinged to the inner side surfaces of the left and right sides of the bracket respectively. When the device is in use, the front opening of the filter box is opposite to the mud flow direction in the elevated trough. The height of the baffle is slightly higher than the height of the hinge between the filter box and the bracket after the guide rod cylinder is turned to a horizontal and slightly upward position. The rotary cylinder, guide rod cylinder, vibration motor and push rod cylinder in the device all work according to the instructions of the host computer.

[0022] The automatic rock cuttings sampling device disclosed in this embodiment directly samples rock cuttings from an elevated trough through a filter box with a filter screen; automatically collects, moves and stores rock cuttings through a guide rod cylinder, a rotary cylinder and a push rod cylinder; separates the mud in the filter box through a vibration motor and causes the rock cuttings in the filter box to fall into a sand receiving box, thereby achieving fast, accurate and automatic sampling of rock cuttings.

[0023] The present embodiment also discloses an automatic rock cuttings sampling method, using the above-mentioned device: after the device is installed in place and activated, the cylinder rod of the push rod cylinder extends out, and the empty sand box that falls from the bottom of the sand box storage chamber into the sand box slot is pushed along the sand box slot to the bottom of the blocking rod, and the cylinder rod of the push rod cylinder retracts; as shown in FIG2(a), the cylinder rod of the guide rod cylinder extends downward, and the filter box is immersed in the mud flow in the elevated tank, and the mud flows in from the front opening of the filter box and flows out from the rear opening, and the rock cuttings in the mud are blocked in the filter box by the filter screen on the rear opening; as shown in FIG2(b), after the rock cuttings are collected, the cylinder rod of the guide rod cylinder retracts, and the filter box is lifted above the mud flow, and the vibration motor is started to separate the rock cuttings and mud in the filter box by vibration; as shown in FIG2(c), the rotating shaft of the rotating cylinder drives the guide rod cylinder to rotate to a horizontal and slightly upward position, and the filter box rises to a high The filter box is placed above the frame slot, with the front opening of the filter box facing upward and the rear opening facing downward; as shown in FIG2(d), the cylinder rod of the guide rod cylinder extends forward, the bottom of the filter box collides with the stopper rod and then turns up around the frame, and the vibration motor vibrates the rock cuttings from the top opening of the filter box to the sand receiving box in the sand receiving box slot at the bottom of the stopper rod; the vibration motor is turned off, the cylinder rod of the guide rod cylinder retracts backward, and the cylinder rod of the push rod cylinder extends out, pushing the empty sand receiving box that falls from the bottom of the sand receiving box storage chamber into the sand receiving box slot along the sand receiving box slot to the bottom of the stopper rod, and the empty sand receiving box pushes the sand receiving box previously filled with rock cuttings forward along the sand receiving box slot in sequence; the rotating shaft of the rotating cylinder drives the guide rod cylinder to rotate to a vertical position, at which time the front opening of the filter box faces forward and the rear opening faces backward, and the cylinder rod of the guide rod cylinder extends downward, immersing the filter box in the mud flow in the elevated slot, and repeats the above steps again after collecting the rock cuttings again for automatic sampling.

Claims

1. A rock cuttings automatic sampling device, characterized in that: The invention comprises a mounting frame installed on the top of the elevated trough, a rotating cylinder is installed on the mounting frame, a vertical guide rod cylinder is installed on the rotating axis of the rotating cylinder, a vibration motor is installed on the guide rod cylinder, the cylinder rod of the guide rod cylinder can be extended downward into the elevated trough, a bracket is installed at the bottom of the cylinder rod of the guide rod cylinder, a filter box is hingedly installed at the bottom of the bracket, the top, front and rear of the filter box are opened, and a filter screen is installed on the rear opening; a sand receiving box trough is installed adjacent to the mounting frame on the elevated trough, a push rod cylinder is installed at one end of the sand receiving box trough, and a push rod cylinder is installed at the top of the sand receiving box trough. A sand receiving box storage chamber is installed, and sand receiving boxes are stacked in the sand receiving box storage chamber. An opening is opened at the bottom of the sand receiving box storage chamber for the sand receiving box to fall into the sand receiving box groove, and a gap is reserved between the bottom of the sand receiving box storage chamber and the sand receiving box groove for the sand receiving box to pass through. A stop rod opposite to the guide rod cylinder is installed on the side of the sand receiving box storage chamber. The cylinder rod of the push rod cylinder is extended to push the sand receiving box that falls into the sand receiving box groove at the bottom of the sand receiving box storage chamber along the sand receiving box groove to the bottom of the stop rod; the width of the mounting frame is adjustable; the mounting position of the guide rod cylinder on the rotating shaft of the rotating cylinder can be adjusted up and down.

2. The automatic cuttings sampling device according to claim 1, characterized in that: The left and right sides of the filter box are respectively hinged to the inner side surfaces of the left and right sides of the bracket.

3. The automatic cuttings sampling device according to claim 1, characterized in that: When the device is in use, the front opening of the filter box is opposite to the mud flow direction in the elevated tank.

4. The automatic cuttings sampling device according to claim 1, characterized in that: The height of the blocking rod is slightly higher than the height of the hinge between the filter box and the bracket after the guide rod cylinder rotates to a horizontal and slightly upward position.

5. The automatic cuttings sampling device according to claim 1, characterized in that: The rotary cylinder, guide rod cylinder, vibration motor and push rod cylinder in the device all work according to the instructions of the host computer.

6. A method for automatic sampling of rock cuttings, using the device according to claim 1, characterized in that: After the device is installed in place and activated, the cylinder rod of the push rod cylinder extends out, and the empty sand box that falls from the bottom of the sand box storage chamber into the sand box slot is pushed along the sand box slot to the bottom of the blocking rod, and the cylinder rod of the push rod cylinder retracts; the cylinder rod of the guide rod cylinder extends downward to immerse the filter box in the mud flow in the elevated trough, and the mud flows in from the front opening of the filter box and flows out from the rear opening, and the rock cuttings in the mud are blocked in the filter box by the filter screen on the rear opening; after the rock cuttings are collected, the cylinder rod of the guide rod cylinder retracts, and the filter box is lifted above the mud flow, and the vibration motor is started to vibrate and separate the rock cuttings and mud in the filter box; the rotating shaft of the rotating cylinder drives the guide rod cylinder to rotate to a horizontal and slightly upward position, at which time the front opening of the filter box faces upward and the rear opening faces downward; The cylinder rod extends forward, the bottom of the filter box collides with the baffle rod and then turns up around the bracket, and the vibration motor vibrates the rock cuttings from the top opening of the filter box into the sand receiving box in the sand receiving box groove at the bottom of the baffle rod; the vibration motor is turned off, the cylinder rod of the guide rod cylinder retracts backward, and the cylinder rod of the push rod cylinder extends out, and the empty sand receiving box that falls from the bottom of the sand receiving box storage chamber into the sand receiving box groove is pushed along the sand receiving box groove to the bottom of the baffle rod, and the empty sand receiving box pushes the sand receiving box previously filled with rock cuttings forward along the sand receiving box groove in sequence; the rotating shaft of the rotating cylinder drives the guide rod cylinder to rotate to a vertical position, at this time the front opening of the filter box faces forward and the rear opening faces backward, the cylinder rod of the guide rod cylinder extends downward, immersing the filter box in the mud flow in the elevated groove, and the above steps are repeated after collecting the rock cuttings again for automatic sampling.

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