CN210483642U - Drift gauge tool for workover operation of oil and gas field - Google Patents

Abstract

The utility model discloses a drifting rule for oil gas field well workover, including top connection, last barrel, core pipe, bracing piece, spring, outer tube, cross liquid dish, retaining ring down, four liquid holes of crossing of circumferential direction equipartition are located to the top connection circular bead. The upper cylinder body is connected with the upper joint by mechanical threads and then welded together, and is connected with the lower cylinder body by two-stage synchronous threads. The upper part of the core tube is connected with the upper joint by a tube thread, and the lower part is sleeved in the outer sleeve. The cross section of the core tube and the cross section of the upper cylinder body are concentric circles. Four supporting rods are arranged on the outer side of the core pipe at equal angles along the circumferential direction. Three liquid passing grooves are uniformly distributed at the lower part of the outer sleeve along the circumferential direction. The bottom of the outer sleeve is welded with the liquid passing disc. A spring is arranged between the top of the outer sleeve and the support rod. A retainer ring is arranged between the upper cylinder and the lower cylinder. The outer diameter of the check ring is larger than the inner diameters of the upper barrel and the lower barrel, and the inner diameter of the check ring is smaller than the outer diameter of the liquid passing disc, so that the liquid passing disc can be prevented from falling off.

Description

Drift gauge tool for workover operation of oil and gas field

Technical Field

The utility model relates to an oil gas field workover tool, especially a drift size gauge tool for oil gas field workover.

Background

The conventional drifting is formed by connecting an oil pipe joint with a shoulder and a large-diameter cylinder body, or a liquid passing hole is formed in the shoulder. During the process of putting the oil pipe into the well, workover fluid is usually returned from the top of the oil pipe. When the well is communicated to a preset position for backwashing, sundries such as rubber and the like remained in the well can return to an oil pipe along with workover fluid without knowing. When the drift well pipe column is lifted and the perforating gun is put in for positioning, the positioning instrument cannot be put down to a preset position due to the blocking of sundries such as rubber entering an oil pipe along with the well-flushing fluid, so that the perforating rework accident is caused.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a drift size gauge for workover of oil and gas fields, so that liquid does not flow out of the top of an oil pipe when the oil pipe is put into a drift well, and environmental pollution is avoided; when the well is back-washed, sundries such as broken rubber and the like remained in the shaft can not enter the oil pipe.

The technical scheme of the utility model is that: a drift size gauge for workover treatment of oil and gas fields comprises an upper joint, an upper cylinder body, a lower cylinder body, a core pipe, a support rod, a spring, an outer sleeve, a liquid passing disc and a retainer ring, wherein a plurality of liquid passing holes are uniformly distributed at the shoulder of the upper joint along the circumferential direction, the outer side of the lower part of the upper joint is connected with the inner wall of the upper part of the upper cylinder body through a mechanical thread, the lower part of the upper cylinder body is connected with the lower cylinder body through a thread, the core pipe is positioned in the upper cylinder body, the upper part of the upper cylinder body is connected with the inner wall of the lower part of the upper joint through a thread, the lower part of the upper joint is sleeved in the outer sleeve, the core pipe is superposed with the axis of the upper cylinder body, a cavity is formed between the core pipe and the upper cylinder body, a plurality of support rods are uniformly arranged at the outer side of the core pipe along the circumferential direction to prevent, the spring sleeve is in the core pipe outside, and upper cylinder and lower barrel junction inner wall are formed with the recess, and the retaining ring is installed in the recess between upper cylinder and lower barrel, and the internal diameter of retaining ring is less than the liquid dish external diameter, prevents to cross the liquid dish and drops.

The upper joint is connected with the upper barrel through a mechanical thread on the outer side of the lower part and then welded together.

The upper cylinder body is connected with the lower cylinder body through double-stage synchronous threads.

Four liquid passing holes are uniformly distributed at the shoulder of the upper joint along the circumferential direction, four support rods are arranged on the outer side of the core pipe at equal angles along the circumferential direction, and three liquid passing grooves are uniformly distributed at the lower part of the outer sleeve along the circumferential direction.

And a reinforcing rib is arranged between the liquid passing disc and the outer sleeve.

The utility model has the advantages that: when the oil pipe is lowered to the well, no liquid is discharged from the top of the oil pipe, so that the environmental pollution is avoided. When the well is flushed to a preset position, sundries such as broken rubber and the like remained in the shaft cannot enter the oil pipe.

Drawings

FIG. 1 is a schematic representation of a drift size for use in oil and gas field workover operations.

Fig. 2 is a sectional view of the upper joint a-a.

FIG. 3 is a schematic view of the outer sleeve and the liquid passing disk.

FIG. 4 is a top view of the outer sleeve and the liquid passing disk.

In the figure: 1. an upper joint; 2. an upper cylinder body; 3. a lower cylinder body; 4. a core tube; 5. a support bar; 6. a spring; 7. an outer sleeve; 8. a liquid passing disc; 9. a retainer ring; 10. a liquid passing hole; 11 passing through a liquid tank; 12. an aperture; 13. and (5) reinforcing ribs.

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

as shown in figures 1-4, the drift size gauge for workover treatment of oil and gas fields of the utility model comprises an upper joint 1, an upper cylinder 2, a lower cylinder 3, a core tube 4, a support rod 5, a spring 6, an outer sleeve 7, a liquid passing disc 8 and a retainer ring 9, wherein a plurality of liquid passing holes 10 are uniformly distributed at the shoulder of the upper joint 1 along the circumferential direction, the outer side of the lower part of the upper joint 1 is connected with the inner wall of the upper part of the upper cylinder 2 through mechanical threads, the lower part of the upper cylinder 2 is connected with the lower cylinder 3 through threads, the core tube 4 is positioned in the upper cylinder 2, the upper part is connected with the inner wall of the lower part of the upper joint 1 through threads, the lower part is sleeved in the outer sleeve 7, the core tube 4 coincides with the axis of the upper cylinder 2, a cavity is formed between the core tube 4 and the upper cylinder 2, a plurality of support rods 5 are arranged at equal angles along the circumferential direction outside the core tube, the core, cross liquid dish 8 welding in outer tube 7 bottom, cross the outer peripheral face equipartition of liquid dish 8 and have a plurality of through-holes 12, install spring 6 between 7 tops of outer tube and the bracing piece 5, spring 6 covers in the core pipe 4 outside, goes up barrel 2 and barrel 3 junction inner wall down and is formed with the recess, and retaining ring 9 installs in the recess between last barrel 2 and barrel 3 down, and retaining ring 9's internal diameter is less than crossing 8 external diameters of liquid dish, prevents to cross liquid dish 8 and drops.

Preferably, the upper joint 1 is connected with the upper cylinder 2 through a mechanical thread on the outer side of the lower part and then welded together. The upper cylinder body 2 and the lower cylinder body 3 are connected by double-stage synchronous threads. Four liquid passing holes are uniformly distributed at the shoulder of the upper joint along the circumferential direction, four support rods are arranged on the outer side of the core pipe at equal angles along the circumferential direction, and three liquid passing grooves are uniformly distributed at the lower part of the outer sleeve along the circumferential direction. And a reinforcing rib 13 is arranged between the liquid passing disc 8 and the outer sleeve 7.

The utility model discloses a theory of operation: when the tubing is lowered to the well, the liquid passing plate moves upwards under exciting pressure and props against the bottom of the core tube, most of fluid in the well returns upwards from annular spaces between the core tube and the upper barrel and between the upper barrel and the lower barrel and the inner wall of the casing, and only a small amount of fluid enters the tubing through the core tube, so that the top of the tubing does not discharge liquid when the tubing is lowered, and environmental pollution is avoided. And (4) after the well is communicated to a preset position, the pipe column is static, and the liquid passing disc is separated from the bottom of the core pipe under the action of the elastic force of the spring to expose the liquid passing long groove. When the well is back-washed, fluid enters from the liquid passing hole at the shoulder part of the upper joint and returns to the oil pipe from the channel between the core pipe and the liquid passing disc, so that sundries such as broken rubber and the like remained in the shaft are prevented from entering the oil pipe.

In summary, the present invention is not limited to the above embodiments, and other embodiments can be easily proposed by those skilled in the art within the technical teaching of the present invention, but all such embodiments are included in the scope of the present invention.

Claims (5)

1. A drift size gauge for workover treatment of oil and gas fields is characterized by comprising an upper joint (1), an upper cylinder (2), a lower cylinder (3), a core pipe (4), support rods (5), a spring (6), an outer sleeve (7), a liquid passing disc (8) and a check ring (9), wherein a plurality of liquid passing holes (10) are uniformly distributed at the shoulder of the upper joint (1) along the circumferential direction, the outer side of the lower part of the upper joint (1) is connected with the inner wall of the upper part of the upper cylinder (2) through mechanical threads, the lower part of the upper cylinder (2) is connected with the lower cylinder (3) through threads, the core pipe (4) is positioned inside the upper cylinder (2), the upper part of the core pipe is connected with the inner wall of the lower part of the upper joint (1) through threads, the lower part of the core pipe is sleeved in the outer sleeve (7), the core pipe (4) is coincided with the axial line of the upper cylinder (2), a cavity is formed between the core pipe (4) and the, prevent that core pipe (4) from being crooked when receiving pressure, outer tube (7) lower part is along a plurality of cistern (11) of crossing of circumferencial direction equipartition, it welds in outer tube (7) bottom to cross liquid dish (8), the outer peripheral face equipartition of crossing liquid dish (8) has a plurality of through-holes (12), install spring (6) between outer tube (7) top and bracing piece (5), spring (6) cover is in the core pipe (4) outside, it is formed with the recess with lower barrel (3) junction inner wall to go up barrel (2), retaining ring (9) are installed in the recess between last barrel (2) and lower barrel (3), the internal diameter ratio of retaining ring (9) is little than crossing liquid dish (8) external diameter, it drops to prevent to cross liquid dish (8).

2. Drift size gauge for oil and gas field workover treatment according to claim 1, characterized in that the upper joint (1) is welded to the upper cylinder (2) after being connected to it by means of mechanical threads on the outside of the lower part.

3. Drift gauge for oil and gas field workover operations according to claim 1, characterized in that said upper cylinder (2) is connected with the lower cylinder (3) with a double-stage synchronous thread.

4. The drift size gauge for workover treatment of oil and gas fields according to claim 1, wherein four liquid passing holes are uniformly distributed at the shoulder of the upper joint along the circumferential direction, four support rods are arranged at the outer side of the core pipe along the circumferential direction at equal angles, and three liquid passing grooves are uniformly distributed at the lower part of the outer sleeve along the circumferential direction.

5. Drift gauge for oil and gas field workover treatment according to claim 1, characterized in that a reinforcing rib (13) is arranged between the liquid passing disc (8) and the outer sleeve (7).

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