CN205748974U - Formation core increment sampling device - Google Patents

Abstract

The utility model relates to a drilling core sampling device for petroleum exploration engineering, and specifically discloses a small stratum core sampling device. The device includes a base and a support vertically arranged on one side of the base. The support is guided and slid up and down with a motor. There is a transmission mechanism for controlling the motor to slide up and down. The lower side of the motor is equipped with a rotating shaft driven by a motor. A sampling drill is installed on the rotating shaft. A core holding device is arranged on the base corresponding to the sampling drill. The upper end of the clamping device is also provided with an annular protective cover. During the sampling process, the protective cover covers the core samples to avoid splashing of cuttings generated during the sampling process. The device of the utility model has simple structure and small volume, and can arbitrarily collect required rock core samples from the rock core by replacing drill bits of different sizes.

Description

Formation core small sample sampling device

technical field

The utility model relates to a drilling core sampling device for petroleum exploration engineering, in particular to a small formation core sampling device.

Background technique

In recent years, as the exploration and development of oil and gas become more difficult, the requirements for understanding the lithology of the formation encountered are getting higher and higher. Therefore, it is necessary for oil logging technicians to collect smaller core samples from the cores obtained by drilling for testing. The characteristics of the analysis equipment are accurately analyzed. The existing sampling device has problems such as large volume and high requirements for the working environment, which is not conducive to working on the mud logging construction site.

Patent document CN101975038B relates to a device for taking rock samples with mudstone cooling gas and a method for taking rock samples. The device for taking rock samples with mudstone cooling gas belongs to the rock mechanics sample preparation tool. The diamond sampling drill bit is installed on the lower end of the sampling device. Its air blowing device, refrigeration device and nozzle are connected into one body. The transparent cover buckles the holding device and nozzle inside. The nozzle is located between the diamond sampling drill bit and the mudstone. Above the contact point of the sample, there is a hole on the upper surface of the transparent cover through which the diamond drill bit can freely enter and exit the transparent cover. The transparent cover is equipped with an exhaust device; the clamping device is a holder capable of clamping small-sized objects. There is a layer of 5mm-10mm rubber cushion on the inner wall of the holder. The device is suitable for sampling mudstone samples, but there are problems in sampling other lithological samples such as sandstone, limestone, dolomite, and shale.

Patent document CN204040966U discloses a borehole sampling device. The borehole sampling device includes a drill pipe. The lower end of the drill pipe is threadedly connected to the joint body, and the joint body is threadedly connected to the cap below. The middle part of the body is provided with a through hole that communicates with the drill pipe and the core tube. The inner diameter of the through hole is large at the top and small at the bottom. The pressure effect of the rock sample improves the sampling rate of the rock sample, and the device is difficult to meet the requirements of small core sample sampling at the mud logging construction site.

Contents of the invention

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a stratum rock core sample sampling device, which is suitable for rock core sample sampling for sandstone, limestone, dolomite, shale, mudstone and other formations, and the rock core sample is complete Good performance, and the device is simple in structure, small in size, safe and convenient in operation, which is beneficial to the field work of mud logging construction.

In order to achieve the above object, the utility model adopts the following technical solutions:

The formation rock core sample sampling device comprises a base and a bracket vertically arranged at the upper end of one side of the base. A motor is mounted on the bracket to guide and slide up and down. A transmission mechanism for controlling the motor to slide up and down is arranged between the motor and the bracket. The lower side of the motor is equipped with a rotating shaft driven by a motor. A sampling drill bit is installed on the rotating shaft. A core holding device is arranged on the base corresponding to the sampling bit. The upper end of the core holding device is also provided with a There is an annular protective cover; the core sample is fixed in the annular protective cover by the core holding device.

The transmission mechanism includes a gear arranged on the casing of the motor, and a gear groove for cooperating with the gear provided on the side of the bracket close to the motor. The motor casing is also provided with a handle for driving the gear. The position of the fixed motor is fixed by the gear groove and the gear meshing.

When the sampling device of the utility model does not operate the handle to drive the gear, the motor will not drive the gear to rotate under the action of its own gravity. It should be understood that when the weight of the motor used is too heavy and the gear will rotate under its own gravity, pin holes can be arranged on the bracket. When the motor needs to be fixed at a certain position, the pin hole can be used. Insert a pin into the hole to prevent the motor from moving down under its own gravity.

The core holding device is a bench vise.

The core holding device is fixed on the base by screws.

The utility model stratum rock core sample sampling device includes a base, a bracket, a motor, a rotating shaft, a sampling drill bit, and a rock core clamping device. The motor is slid up and down on the bracket, and when the rock core needs to be sampled, the motor is controlled to go down along the bracket. Move close to the core, drive the rotating shaft to rotate under the action of the motor, and then drive the sampling bit to rotate to drill the core, which is easy to operate; at the same time, a ring-shaped protective cover that is concentric with the axial direction of the sampling bit is set on the core holding device. In the process, the protective cover covers the core samples to avoid splashing of cuttings generated during the sampling process. The device of the utility model has simple structure and small volume, and can arbitrarily collect the required rock core sample from the rock core by replacing drill bits of different sizes. Sampling of rock cores in various strata such as rocks, mudstones, etc. is beneficial to the field work of mud logging construction.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a small formation core sampling device provided by an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. 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.

The stratum rock core sample sampling device comprises a base 5 and a support 4 vertically arranged on the upper end of one side of the base. The support 4 is guided and slid up and down to be equipped with a motor 1, and a motor 1 is arranged between the motor 1 and the support 4 to control the motor 1 up and down. Sliding transmission mechanism, the lower side of the motor 1 is equipped with a motor-driven rotating shaft, the sampling drill 2 is installed on the rotating shaft, and the position corresponding to the sampling drill 2 is provided with a core holder on the base 5 Device 3, the upper end of the core holding device 3 is also provided with an annular protective cover 7; the core sample is fixed in the annular protective cover by the core holding device; the core holding device 3 is a bench vise; the core The clamping device 3 is fixed on the base by screws.

In this embodiment, the transmission mechanism includes a gear arranged on the casing of the motor, and a gear groove for cooperating with the gear provided on the side close to the motor on the bracket, and a handle for driving the gear is also arranged on the casing of the motor 6. The gear groove and the gear mesh to fix the position of the motor.

When the sampling device in this embodiment does not operate the handle to drive the gear, the motor will not drive the gear to rotate under the action of its own gravity. It should be understood that when the weight of the motor used is too heavy and the gear will rotate under its own gravity, pin holes can be arranged on the bracket. When the motor needs to be fixed at a certain position, the pin hole can be used. Insert a pin into the hole to prevent the motor from moving down under its own gravity.

During the working process of the stratum core small sample sampling device of this embodiment, the stratum core to be sampled is fixed on the core holder 3, and the protective cover 7 covers the core sample to avoid the debris splashing during the sampling process. After turning on the power, pass the handle 6. The rotating motor 1 and the drill bit 2 are slowly lowered along the support 4 to approach the core, and the drill bit 2 rotating under artificial action samples the core to obtain a sample of the core to be collected.

Claims (4)

1. The stratum rock core sample sampling device comprises a base and a support vertically arranged on the upper end of one side of the base. It is characterized in that the support is guided and slid up and down and equipped with a motor. The transmission mechanism, the lower side of the motor is equipped with a motor-driven rotating shaft, a sampling drill bit is installed on the rotating shaft, a core holding device is arranged on the base corresponding to the sampling bit, and the core The upper end of the clamping device is also provided with an annular protective cover; the rock core sample is fixed in the annular protective cover through the core clamping device. 2. formation rock core sample sampling device as claimed in claim 1, is characterized in that, described transmission mechanism comprises the gear that is arranged on the shell of described motor and the side that offers near motor on the support is used for cooperating with gear. The gear groove, the motor casing is also provided with a handle for driving the gear, and the gear groove is engaged with the gear to fix the position of the motor. 3. The formation rock core small sample sampling device as claimed in claim 1 or 2, wherein the rock core clamping device is a bench vise. 4. The formation rock core small sample sampling device as claimed in claim 1 or 2, wherein the rock core holding device is fixed on the base by screws.