CN211235005U - Sampling device - Google Patents

Abstract

The utility model discloses a sampling device, which belongs to the technical field of oil exploration well testing. It comprises: a cylindrical body and a one-way door, the cylindrical body is tubular, and one end of the cylindrical body has a ring-shaped cutting edge. The one-way door is located in the barrel, the one-way door has an open state and a closed state, and the one-way door can be changed from the closed state to the closed state under a thrust from the side of the cutting edge In the open state, if the one-way door is in the closed state, the one-way door blocks the inner cavity of the cylinder, and if the one-way door is in the open state, the inner cavity of the cylinder is connected. The sampling device can easily obtain the dirt on the inner wall of the oil pipe, avoids the locking accident with the inner wall of the oil pipe, and improves the operation efficiency.

Description

Sampling device

technical field

The utility model relates to the technical field of oil exploitation well testing, in particular to a sampling device.

Background technique

In the process of gas field development, after the fluids in the gas reservoir, such as condensate oil, gas, and water, flow out of the gas layer, due to changes in temperature, pressure, and oil-gas-water balance state, compounds and other deposits are formed on the inner wall of the tubing, thereby Fouling is formed. Due to the different blocks and types of oil and gas wells and the different production stages of oil and gas wells, the types and characteristics of the scale on the inner wall of the tubing are also different. It is necessary to obtain samples of the scale on the inner wall of the tubing for composition analysis.

At present, a casing scraper with a similar diameter to the tubing of the oil and gas well is mainly placed in the oil and gas well, and the inner wall of the tubing is scraped with a blade on the casing of the casing scraper to obtain a sample of the dirt on the inner wall of the tubing.

Utility model content

The embodiment of the present utility model provides a sampling device, which can facilitate sampling and improve operation efficiency. The technical scheme is as follows:

The embodiment of the present utility model provides a sampling device, comprising a cylindrical body, the cylindrical body is tubular, and one end of the cylindrical body has a ring-shaped cutting edge;

a one-way door, the one-way door is located in the barrel, the one-way door has an open state and a closed state, and the one-way door can be moved from the closed state under a thrust from the side of the cutting edge Change to the open state. If the one-way door is in the closed state, the one-way door blocks the inner cavity of the cylinder. If the one-way door is in the open state, the cylinder is in the open state. Inner cavity communication.

Optionally, the one-way door includes a baffle plate and a baffle ring, the baffle ring is coaxially and fixedly connected to the inner wall of the cylinder, and the edge of the baffle plate is hinged with the baffle ring. The door is in the closed state, and the baffle is covered at the inner hole of the retaining ring. If the one-way door is in the open state, the baffle is located at a distance of the retaining ring away from the cutting edge. On the side, the baffle is separated from the inner hole of the retaining ring.

Optionally, the cylinder body has a fixing hole penetrating the side wall of the cylinder body, a bolt is inserted in the fixing hole, and the bolt is connected with the retaining ring.

Optionally, one side of the baffle plate has a boss adapted to the inner hole of the retaining ring. If the one-way door is in the closed state, the boss is located in the inner hole of the retaining ring. , the side wall of the boss is in contact with the side wall of the inner hole of the retaining ring.

Optionally, the boss is in the shape of a truncated cone, and the inner hole of the retaining ring is in the shape of a cone.

Optionally, the cutting edge forms an acute angle with the axis of the barrel.

Optionally, on the cylinder body, the cutting edge angle of each area located at the cutting edge is positively correlated with the axial distance from the each area to the one-way door.

Optionally, there are multiple strip-shaped openings distributed circumferentially on the side wall of the cylinder, the multiple strip-shaped openings and the cutting edge are located on the same side of the one-way door, and the strip-shaped openings are located on the same side of the one-way door. It penetrates through the side wall of the cylindrical body and extends to the cutting edge along the axial direction of the cylindrical body.

Optionally, the sampling device includes two of the one-way doors, and the two one-way doors are arranged in the cylinder at intervals.

Optionally, the cylinder body has a plurality of discharge holes, and the discharge holes and the cutting edge are located on both sides of the one-way door.

The beneficial effects brought by the technical solutions provided by the embodiments of the present utility model include at least:

One end of the cylinder has a ring-shaped cutting edge. During the lowering process of the sampling device, the end with the cutting edge is downward. pass. The dirt and debris formed after the dirt attached to the inner wall of the oil pipe is cut by the cutting edge can enter the inside of the cylinder through the end with the cutting edge. By arranging a one-way door in the cylinder, the one-way door has an open state and a closed state, and the one-way door can be changed from the closed state to the open state under the thrust from the cutting edge side, and the dirt and debris entering the cylinder are pushed One-way door, the one-way door is changed from the closed state to the open state, and the dirt and debris pass through the one-way door. When the sampling device reaches the predetermined position, the sampling device is lifted up. Since no new dirt debris enters the cylinder, the upward thrust of the dirt debris on the one-way door disappears, and the baffle is opened from the open state under the action of gravity. Switch to closed position, leaving dirt debris in the barrel that passes through the one-way door. It is convenient for sampling and improves the working efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a partial structural cross-sectional view of a sampling device provided by an embodiment of the present invention;

2 is a schematic structural diagram of a one-way door provided by an embodiment of the present invention;

3 is a schematic diagram of a partial structure of a one-way door provided by an embodiment of the present invention;

4 is a structural cross-sectional view of a sampling device provided by an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present utility model more clear, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a partial structural cross-sectional view of a sampling device provided by an embodiment of the present invention. As shown in FIG. 1 , the sampling device includes: a cylinder 1 and a one-way door 3 .

The cylindrical body 1 has a tubular shape, and one end of the cylindrical body 1 has an annular cutting edge 2 .

The one-way door 3 is located in the cylinder body 1, and the one-way door 3 has an open state and a closed state. The one-way door 3 can be changed from the closed state (the state shown in FIG. 1 ) to the open state under the thrust from the side of the cutting edge 2 . If the one-way door 3 is in the closed state, the one-way door 3 cuts off the In the inner cavity, if the one-way door 3 is in the open state, the inner cavity of the cylinder body 1 is connected.

One end of the cylinder has a ring-shaped cutting edge. During the lowering process of the sampling device, the end with the cutting edge is downward. pass. The dirt and debris formed after the dirt attached to the inner wall of the oil pipe is cut by the cutting edge can enter the inside of the cylinder through the end with the cutting edge. By arranging a one-way door in the cylinder, the one-way door has an open state and a closed state, and the one-way door can be changed from the closed state to the open state under the thrust from the cutting edge side, and the dirt and debris entering the cylinder are pushed One-way door, the one-way door is changed from the closed state to the open state, and the dirt and debris pass through the one-way door. When the sampling device reaches the predetermined position, the sampling device is lifted up. Since no new dirt debris enters the cylinder, the upward thrust of the dirt debris on the one-way door disappears, and the baffle is opened from the open state under the action of gravity. Switch to closed position, leaving dirt debris in the barrel that passes through the one-way door. It is convenient for sampling and improves the working efficiency.

As shown in FIG. 1 , in the embodiment of the present invention, the sampling device may include two one-way doors 3 , and the two one-way doors 3 are arranged in the cylinder at intervals. The two one-way doors 3 arranged at intervals and the inner cavity of the cylinder body 1 form a closed sampling chamber, which is used for sampling and storing the dirt and debris. It should be noted that, in other possible implementation manners, the sampling device may also include 3, 4 or more one-way doors 3, as long as a sampling chamber can be formed with the inner cavity of the cylinder body 1 to sample the dirt and debris It can be stored, which is not limited in the embodiment of the present invention.

Optionally, the one-way door 3 may include a baffle 31 and a baffle 32, the baffle 32 is coaxially and fixedly connected to the inner wall of the cylinder 1, and the edge of the baffle 31 is hinged with the baffle 32. If the one-way door 3 is closed If the one-way door 3 is in the open state, the baffle 31 is located on the side of the baffle ring 32 away from the cutting edge 2, and the baffle 31 is separated from the inner hole of the baffle ring 32. . FIG. 2 is a schematic structural diagram of a one-way door provided by an embodiment of the present invention. As shown in FIG. 1 and FIG. 2 , the edge of the baffle 31 is hinged with the retaining ring 32 through a rotation axis A, and the baffle 31 can rotate relative to the retaining ring 32 around the rotation axis A. When the dirt debris entering the cylinder passes through the one-way door 3, the dirt debris exerts a thrust on the retaining ring 32, the retaining ring 31 is rotated from the closed state to the open state, the retaining plate 31 is separated from the inner hole of the retaining ring 32, and the dirt and debris are separated from the inner hole of the retaining ring 32. The debris enters the sampling chamber through the inner hole of the retaining ring 32 . When the cylinder body 1 stops lowering and lifts the cylinder body 1 upward, no dirt debris continues to pass through the one-way door 3, the thrust exerted by the dirt debris on the baffle 31 disappears, and the baffle 31 moves away from the cutting edge under the action of gravity. One side of 2 is rotated to the closed state, forming a cover for the inner hole of the retaining ring 32 to prevent the dirt and debris entering the sampling chamber from leaking out of the inner hole of the retaining ring 32, so as to realize the storage of dirt and debris in the sampling chamber.

Exemplarily, in the embodiment of the present invention, the rotation axis A is located on the side of the retaining ring 32 away from the cutting edge 2, and the baffle 31 can only be rotated on the side of the retaining ring 32 away from the cutting edge 2 through the rotation axis A, preventing the Leakage of scale debris in the sampling chamber.

Optionally, the cylinder body 1 has a fixing hole 11 penetrating the side wall of the cylinder body 1 , a bolt 4 is inserted in the fixing hole 11 , and the bolt 4 is connected with the retaining ring 32 . When assembling the sampling device, the retaining ring 32 is coaxially arranged in the inner wall of the cylinder body 1 and the countersunk hole 32 on the retaining ring 32 is aligned with the fixing hole 11, and the bolt 4 is used to pass through the fixing hole 11 from the cylinder body 1. The outer wall is tightened inward to realize the fixed connection between the retaining ring 32 and the cylinder body 1 . This connection method is simple in structure and convenient in installation.

Optionally, one side of the baffle 31 has a boss 311 that fits with the inner hole of the retaining ring 32. If the one-way door 3 is in a closed state, the boss 311 is located in the inner hole of the retaining ring 32, and the side of the boss 311 is located in the inner hole of the retaining ring 32. The wall is in contact with the side wall of the inner hole of the retaining ring 32 . When the one-way door 3 is in the closed state, there may be a gap between the baffle 31 covering the retaining ring 32 and the retaining ring 32, and because the sampling device may collide or shake with the pipe wall during the movement of the oil pipe, it is located in the sampling chamber. The dirt and debris in the sample are easily leaked out of the sampling device through the gap. By arranging the boss 311 on the baffle 31, when the one-way door 3 is in the closed state, the side wall of the boss 311 is in contact with the side wall of the inner hole of the retaining ring 32, so that the baffle 31 and the retaining ring 32 are closely matched At the same time, the gap between the baffle 31 and the retaining ring 32 is blocked, so as to strengthen the sealing of the sampling device.

Optionally, the boss 311 is in the shape of a truncated cone, and the inner hole of the retaining ring 32 is in the shape of a cone. The inner hole diameter of the retaining ring 32 gradually decreases along the axis of the cylinder 1 toward the cutting edge 2 , that is, the large end of the corresponding boss 311 is far away from the cutting edge 2 , and the small end is close to the cutting edge 2 . Since the baffle plate 31 can only be rotated on the side of the baffle ring 32 away from the cutting edge 2 through the rotation axis A, when the one-way door 3 is changed from the closed state to the open state, the big end of the boss 311 leaves the edge of the baffle ring 32 first. When the one-way door 3 changes from the open state to the closed state, the small end of the boss 311 enters the inner hole of the retaining ring 32 first. Such a design makes the cooperation between the boss 311 and the inner hole of the retaining ring 32 smoother, and will not cause the wear of the boss 311 and the inner hole of the retaining ring 32 due to interference, which improves the service life of the sampling device.

Optionally, the cutting edge 2 forms an acute angle α with the axis of the barrel 1 . That is, the plane where the annular cutting edge 2 is located is inclined at an acute angle α with the axis of the cylindrical body 1 . During the drilling operation, the part 2a of the cutting edge 2 away from the one-way door 3 can take the lead in cutting the dirt on the inner wall of the oil pipe, cutting the dirt on the inner wall of the oil pipe into debris, which is convenient for the sampling device to collect, and at the same time Avoid the dirt on the inner wall of the tubing to block the passage of the sampling device. After the portion 2a of the cutting edge 2 away from the one-way door 3 cuts the dirt on the inner wall of the oil pipe, residual dirt and debris may still adhere to the inner wall of the oil pipe, which may cause the sampling device to be locked. The part 2b of the cutting edge 2 close to the one-way door 3 can not only cut the dirt on the inner wall of the oil pipe, but also scrape the remaining dirt and debris on the inner wall of the oil pipe, so as to realize the cleaning function of the inner wall of the oil pipe. Prevent jamming of the sampling device.

Optionally, on the cylinder body 1 , the cutting edge angle of each area at the cutting edge 2 is positively correlated with the axial distance from each area to the one-way door 3 . The edge angle is the angle between the two faces that form the cutting edge. In the embodiment of the present invention, the cutting edge angle of the cutting edge 2 increases with the increase of the axial distance from the one-way door 3 . As shown in FIG. 1, the part 2a of the cutting edge 2 that is far from the one-way door 3 has the farthest axial distance from the one-way door 3, the edge angle β of this part is the largest, and the strength of the cutting edge 2 is also the largest, ensuring that the cutting edge 2. The cutting edge is not rolled when encountering dirt; the part 2b of the cutting edge 2 close to the one-way door 3 has the closest axial distance to the one-way door 3, the edge angle γ of this part is the smallest, and the cutting edge 2 of this part is mainly The function is to scrape and clean the residual dirt and debris on the inner wall of the oil pipe, and the strength of the cutting edge 2 is relatively low, so reducing the cutting edge angle in this area can save materials and reduce the production cost of the sampling device.

Exemplarily, in the embodiment of the present invention, β≤40°, γ≤20°, and β>γ.

Optionally, the side wall of the cylinder body 1 may have multiple strip-shaped openings 21 distributed in the circumferential direction, the multiple strip-shaped openings 21 and the cutting edge 2 are located on the same side of the one-way door 3, and the strip-shaped openings 21 run through the cylinder body. 1, and extends to the cutting edge 2 along the axial direction of the barrel 1. The multiple strip openings 21 divide the cutting edge 2 into a plurality of independent parts. When the outer diameter of the cylinder body 1 is quite different from the inner diameter of the inner wall of the oil pipe, the cylinder body 1 can be manually adjusted to the end of the cylinder body 1 close to the cutting edge 2. The wall expands outward, so that the diameter of the cutting edge 2 becomes larger, and the gap between the cutting edge 2 and the inner wall of the oil pipe is reduced. When the sampling device passes through the deformed part of the inner wall of the tubing during the lowering process, the force generated by the contact between the cutting edge 2 and the deformed part of the inner wall of the tubing causes the cutting edge 2 to deform. At this time, the gap of the strip opening 21 can be used as a buffer space, and the cutting edge 2 passes through The gap of the bar-shaped opening 21 is deformed inwardly along the radial direction of the cylinder body 1 , reducing the outer diameter of the cutting edge 2 and preventing the sampling device from being stuck by the deformed inner wall of the oil pipe.

Optionally, the cylinder body 1 may have a plurality of discharge holes 12 , and the discharge holes 12 and the cutting edge 2 are located on both sides of the one-way door 3 . The discharge hole 12 is connected to the inner cavity and the outer wall of the cylinder body 1. When the sampling device is lowered, excessive dirt and debris can be discharged out of the sampling device through the discharge hole 12, so as to avoid the dirt and debris in the cylinder body 1. The inner cavity is accumulated to reduce the friction of dirt debris on the inner wall of the cylinder body 1, so as to reduce the downward resistance of the sampling device.

Exemplarily, in the embodiment of the present invention, the axis of the discharge hole 12 and the axis of the cylinder body 1 have an included angle of less than 60°, and the discharge hole 12 is in a direction away from the cutting edge 2 along the axial direction of the cylinder body 1 . tilt. Setting the discharge hole 12 on the cylinder body 1 at an angle can reduce the resistance of the hole wall of the discharge hole to the dirt debris, so that the dirt debris can be more smoothly discharged from the inner cavity of the barrel body 1 to the sampling device outside.

Exemplarily, the sampling device may further include a torsion spring 5 , and the torsion spring 5 is coaxial with the rotation axis A of the baffle 31 . FIG. 3 is a partial structural schematic diagram of a one-way door provided by an embodiment of the present invention. As shown in FIG. 3 , the torsion spring 5 has a first supporting leg 51 and a second supporting leg 52 . The first supporting leg 51 is connected to the baffle plate 31 , and the second supporting leg 52 is connected to the retaining ring 32 .

When no dirt or debris passes through the one-way door 3, the elastic force of the torsion spring 5 and the gravity of the baffle 31 keep the baffle 31 in a closed state. When the dirt debris entering the cylinder body 1 passes through the one-way door 3, the dirt debris exerts a thrust on the retaining ring 32, the retaining plate 31 rotates from the closed state to the open state, and is separated from the retaining ring 32, and the dirt debris is blocked by the retaining ring 32. The inner bore of the ring 32 enters the sampling chamber. When no dirt debris passes through the one-way door 3, the thrust exerted by the dirt debris on the retaining ring 32 disappears, and the first supporting foot 51 of the torsion spring 5 exerts a rotational force on the baffle plate 31 due to the deformation, so that the retaining ring 31 is deformed. The plate 31 is rotated back to the closed state.

4 is a structural cross-sectional view of a sampling device provided by an embodiment of the present invention. As shown in FIG. 4 , the sampling device may further include a jar 6, the jar 6 has a jar 61 and a jar cylinder 62, the jar 61 is sleeved in the jar cylinder 62, and the jar The cutter barrel 62 is detachably connected to the side of the barrel 1 away from the cutting edge 2 . The jar cylinder 62 and the cylinder 1 are arranged in a detachable connection structure, which facilitates the storage of the sampling device when not in use. The jar cylinder 62 has a stroke for the jarring part 61 to move in it. When the sampling device is stuck with the inner wall of the oil pipe during the lowering process, the jarring part 61 will collide with the jar cylinder 62 downward. , giving the cutting edge 2 the power to cut down the dirt on the inner wall of the oil pipe to enhance the cutting effect. When the sampling device is stuck by the inner wall of the oil pipe, the jarring portion 61 will collide with the jar cylinder 62 upward, and the cutting edge 2 will be powered upward to realize the jarring release.

Optionally, the sampling device further includes a weighted rod 7 , and the weighted rod 7 is connected to the shock portion 61 . By arranging the weighting rod 7 connected to the jarring part 61, the overall weight of the sampling device can be increased to overcome the frictional force of the inner wall of the oil pipe on the sampling device and the relative force generated by the dirt and debris on the cylinder 1 during the lowering of the sampling device. Exemplarily, when the sampling device contacts the dirt on the inner wall of the oil pipe and encounters resistance, the weighting rod 7 can cooperate with the jarring part 61 connected to it to collide with the jarring cylinder 62 downward, and the jarring 9 can be added to give cutting. The downward power of edge 2 enhances the cutting effect. When the sampling device is stuck by the inner wall of the oil pipe, the jarring portion 61 will collide with the jar cylinder 62 upward, and provide upward power to the cutting edge 2 to assist in releasing the jar by jarring.

Optionally, the sampling device further includes a rope cap 8 , and the rope cap 8 is connected with the weighted rod 7 . One end of the rope cap 8 is connected with the weighting rod 7, and the other end can be connected with a well testing wire or cable, so as to connect the sampling device with the wire or cable used for well testing.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. A sampling device, comprising:

the barrel body (1), the barrel body (1) is tubular, and one end of the barrel body (1) is provided with an annular cutting edge (2);

one-way door (3), one-way door (3) are located in barrel (1), one-way door (3) have opening state and closed state, one-way door (3) can receive come from under the thrust of cutting edge (2) one side the closed state changes to the open state, if one-way door (3) are in the closed state, one-way door (3) cut off the inner chamber of barrel (1), if one-way door (3) are in the open state, the inner chamber intercommunication of barrel (1).

2. The sampling device according to claim 1, characterized in that the one-way door (3) comprises a baffle (31) and a retainer ring (32), the retainer ring (32) is coaxially and fixedly connected with the inner wall of the barrel (1), the edge of the baffle (31) is hinged to the retainer ring (32), if the one-way door (3) is in the closed state, the baffle (31) covers the inner hole of the retainer ring (32), if the one-way door (3) is in the open state, the baffle (31) is located on the side of the retainer ring (32) far away from the cutting edge, and the baffle (31) is separated from the inner hole of the retainer ring (32).

3. The sampling device according to claim 2, characterized in that the cylinder (1) is provided with a fixing hole (11) penetrating through the side wall of the cylinder (1), a bolt (4) is inserted into the fixing hole (11), and the bolt (4) is connected with the retainer ring (32).

4. The sampling device according to claim 2, characterized in that one side of the baffle (31) is provided with a boss (311) which is matched with the inner hole of the retainer ring (32), if the one-way door (3) is in the closed state, the boss (311) is positioned in the inner hole of the retainer ring (32), and the side wall of the boss (311) is attached to the side wall of the inner hole of the retainer ring (32).

5. A sampling device according to claim 4, characterized in that the boss (311) is frustoconical and the inner bore of the collar (32) is tapered.

6. A sampling device according to any one of claims 1-5, characterized in that the cutting edge (2) is at an acute angle (α) to the axis of the barrel (1).

7. A sampling device according to claim 6, characterized in that on the barrel (1) the edge angle of each area at the cutting edge (2) is positively correlated to the axial distance of the area to the one-way gate (3).

8. The sampling device according to any one of claims 1 to 5, characterized in that the side wall of the barrel (1) is provided with a plurality of circumferentially distributed strip-shaped openings (21), the strip-shaped openings (21) and the cutting edges (2) are positioned at the same side of the one-way door (3), and the strip-shaped openings (21) penetrate through the side wall of the barrel (1) and extend to the cutting edges (2) along the axial direction of the barrel (1).

9. A sampling device according to any one of claims 1 to 5, characterized in that the sampling device comprises 2 said one-way gates (3), 2 said one-way gates (3) being arranged at intervals within the barrel (1).

10. A sampling device according to any one of claims 1 to 5, characterized in that the barrel (1) has a plurality of discharge holes (12), the discharge holes (12) and the cutting edges (2) being located on both sides of the one-way gate (3).

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