CN219733332U

CN219733332U - Drilling and milling dredging well repairing tool

Info

Publication number: CN219733332U
Application number: CN202321190465.9U
Authority: CN
Inventors: 黄有为
Original assignee: Nanzhi Chongqing Energy Technology Co ltd
Current assignee: Nanzhi Chongqing Energy Technology Co ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-09-22
Anticipated expiration: 2033-05-17

Abstract

The utility model discloses a drilling and milling through well repairing tool, which not only greatly improves the sand carrying capacity of the tool body by arranging a plurality of sand dredging grooves on the tool body, but also can dredge and obtain the sand which is quickly sunk, and can bring the sand sunk in the past back to the ground, thereby being capable of more thoroughly removing the sand sunk at the bottom of the well, greatly improving the operation efficiency and the well repairing and yield increasing effects, prolonging the well repairing period and reducing the well repairing cost, and increasing the upward return capacity of the sand by arranging a plurality of reverse circulation holes, meanwhile, as the sand dredging grooves are arranged from top to bottom, the sand dredging efficiency is equivalent to arranging a plurality of secondary shut-in blocks for the sand sunk, so that the sand dredging efficiency exceeds 70%, and the underground complex accidents such as drilling and drilling tool filling caused by the sand sinking can be effectively avoided, and the safety risk of underground operation is greatly reduced.

Description

Drilling and milling dredging well repairing tool

Technical Field

The utility model relates to the technical field of petroleum tools, in particular to a drilling and milling dredging well repairing tool.

Background

In the middle and later stages of oil gas production well production, sand setting at the bottom of the well is serious, and the bottom of the well is buried, so that the production is reduced or the production cannot be performed. Therefore, flushing and sand-bailing operations are required for oil and gas production wells.

However, when the existing well repairing tool is used for flushing and sand-bailing operations, the sedimentation speed of sand is very high, and the bottom hole flow field cannot be changed, so that the upward return speed and sand carrying capacity of the sand are insufficient, the sand cannot be effectively brought back to the ground, the bottom hole sand is difficult to thoroughly clean, the single operation time is long, the yield increasing effect is poor, and the oil and gas production well is required to be flushed and bailed again for too long, so that the well repairing cost is extremely high.

In addition, the existing well repairing tool is unreasonable in structure, so that underground complex accidents such as drilling sticking, sand sinking, drilling tool filling and the like frequently occur in the sand bailing operation process, and underground safety risks are high.

Solving the above problems is urgent.

Disclosure of Invention

The utility model provides a drilling and milling dredging well repairing tool, which aims to solve the technical problems that the existing well repairing tool is difficult to thoroughly remove sand at the bottom of a well and is easy to cause underground safety accidents.

The technical scheme is as follows:

the utility model provides a bore and mill logical well workover instrument of dragging for, is including being the instrument body of round bar form structure, and the lower extreme of this instrument body has the boring and milling head, be equipped with on the outer peripheral face of instrument body from down up dragging for the sand groove that sets up side by side, the external diameter in each sand groove of dragging for is the same, and the notch in each sand groove of dragging for all towards the upper end of instrument body, boring and milling head along circumference protrusion in instrument body, a plurality of reverse circulation holes along circumference distribution have been seted up on this boring and milling head, and each reverse circulation hole all runs through boring and milling head's up and down terminal surface.

Compared with the prior art, the utility model has the beneficial effects that:

according to the drilling and milling through well repairing tool adopting the technical scheme, through the arrangement of the sand dredging grooves on the tool body, the sand carrying capacity of the drilling and milling through well repairing tool is greatly improved, and the sand which is fast sinking can be dredged, so that the sand which is sinking in the past can be brought back to the ground, the sand which is sinking in the bottom of the well can be more thoroughly removed, the operation efficiency and the well repairing and yield increasing effect are greatly improved, the well repairing period is prolonged, the well repairing cost is reduced, and the upward returning capacity of the sand can be improved by additionally arranging the reverse circulation holes, meanwhile, the sand dredging grooves are arranged from top to bottom, the sand dredging rate is over 70% because the sand dredging grooves are correspondingly provided with a plurality of secondary barriers, and the underground complex accidents such as drilling and drilling tool blocking caused by the sand sinking can be effectively avoided, and the safety risk of underground operation is greatly reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the utility model without pitching;

FIG. 3 is a cross-sectional view of the present utility model after pitching;

fig. 4 is a schematic view of the structure of the lower end face of the milling head.

Detailed Description

The utility model is further described below with reference to examples and figures.

As shown in fig. 1 and 2, a drilling and milling through well repairing tool mainly comprises a tool body 1 with a round rod-shaped structure, wherein the lower end of the tool body 1 is provided with a drilling and milling head 2, and the drilling and milling through well repairing tool has two functions of drilling and milling by arranging the drilling and milling head 2, and in the embodiment, the tool body 1 and the drilling and milling head 2 are integrally formed, so that the tool is high in structural strength and durable in use.

The outer peripheral surface of the tool body 1 is provided with the sand scooping grooves 3 which are arranged side by side from bottom to top, the outer diameters of the sand scooping grooves 3 are the same, the notch of each sand scooping groove 3 faces the upper end of the tool body 1, the sand scooping grooves 3 are arranged on the tool body 1, the sand blocking capability of the tool body is greatly improved, and the sand which is quickly submerged can be fished, the sand which is submerged in the past can be brought back to the ground, so that the sand which is submerged in the bottom of the well can be more thoroughly removed, the operation efficiency and the well repair yield increasing effect are greatly improved, the well repair period is prolonged, the well repair cost is reduced, and meanwhile, the sand scooping rate is more than 70% due to the fact that a plurality of sand scooping grooves 3 are arranged from top to bottom, underground complex accidents such as drilling and filling drilling tools caused by the sand sinking are effectively avoided, and the safety risk of underground operation is greatly reduced.

Further, the bailing bowl 3 includes a bailing bowl wall 3a having a circular ring structure and a bailing bowl bottom 3b having a conical surface structure, and the bailing bowl bottom 3b extends from the lower edge of the corresponding bailing bowl wall 3a to the outer wall of the tool body 1 in an inward inclined manner. By designing the bottom 3b of the sand bailing groove into a conical surface structure, the influence on the drilling fluid flow field can be effectively reduced, and the sand storage amount of the sand bailing groove 3 can be increased. Further, the oblique angle alpha of the bottom 3b of the sand bailing groove is smaller than 45 degrees, so that the influence on the drilling fluid flow field is further reduced, and the sand storage amount of the sand bailing groove 3 is increased.

In the embodiment, the drilling and milling head 2 and each sand bailing groove 3 are integrally formed, so that the structure is high in strength and durable.

Referring to fig. 1-3, a drill bit 2 protrudes from a tool body 1 along a circumferential direction, a plurality of reverse circulation holes 4 distributed along the circumferential direction are formed on the drill bit 2, and each reverse circulation hole 4 penetrates through upper and lower end surfaces of the drill bit 2. In addition, by adding the reverse circulation hole 4 on the milling head 2, the upward return capability of sand can be increased, and the capturing amount of the sand can be improved. In this embodiment, the reverse circulation hole 4 is obliquely arranged from top to bottom along the radial direction of the drilling and milling head 2, so that the reverse circulation hole can cooperate with the bottom 3b of the bailing groove with a conical surface structure to guide the drilling fluid carrying sand to return upwards more smoothly.

Referring to fig. 2-4, the downward protruding inserts 7 are uniformly distributed on the lower end surface of the milling head 2, and the milling capability of the tool can be effectively improved by arranging the inserts 7. In this embodiment, the insert 7 is preferably made of diamond, so that the hardness is high, not only can a harder sand layer be drilled and ground, but also a sand surface well body can be easily detected, and therefore, the sand surface well body can be accurately calibrated.

The number of the inserts 7 is nine, every three inserts 7 which are annularly and uniformly distributed form an insert group, and the three insert groups are sequentially distributed from inside to outside along the radial direction of the drilling and milling head 2, so that the drilling and milling capability of the tool is greatly improved. Wherein the angle between adjacent buttons 7 in each button group is 120 deg.. Further, three inserts 7 of one insert group located at the outermost side are protruded out of the outer peripheral surface of the drilling and milling head 2, so that drilling and milling capability can be improved, and the problem of jamming is avoided.

Referring to fig. 2 and 3, a central water hole 5 penetrating up and down is provided along a central axis of the tool body 1, a lower end of the central water hole 5 penetrates down through a lower end face of the milling head 2, the tool body 1 is divided into an upper tool section and a middle and lower tool section from top to bottom in sequence, the sand bailing grooves 3 are axially distributed on an outer peripheral face of the middle and lower tool section, an upper portion of the central water hole 5 expands to form a ball throwing section 5a, a lower end of the ball throwing section 5a forms a ball throwing seat seal 5b with a conical surface structure, a plurality of bypass water holes 6 are provided in a circumferential direction of the ball throwing section 5a, an inner end of each bypass water hole 6 is communicated with the ball throwing section 5a, and an outer end of each bypass water hole 6 penetrates through an outer wall of the upper tool section. When the sealing ball 8 is not thrown, the drilling fluid mainly flows into the shaft at the lower end from the central water hole 5 (only a very small part overflows from the bypass water hole 6), so that the bottom hole injection, drilling through and water horsepower are enhanced to obtain better sand flushing footage, and the drilling fluid is particularly suitable for the situation of serious bottom hole sand setting. When the ball-throwing seat seal 5b is plugged by throwing the sealing ball 8, the drilling fluid in the central water hole 5 flows downwards after being gushed out from each bypass water hole 6, the surrounding well wall can be flushed in the process, meanwhile, mixed flow is formed with upward-return drilling fluid of the total drilling fluid system, the distribution of a well bottom flow field can be fully changed, the upward-return speed is increased, and the sand-carrying capacity is improved. In addition, the sand fishing groove 3 is not arranged around the bypass water hole 6, so that the obstruction to the flow of drilling fluid can be avoided. Therefore, the drilling and milling through well repairing tool has multiple functions of drilling, milling, punching and fishing.

In this embodiment, the diameter of the main body of the central water hole 5 is preferably 12mm-18mm, so as to meet the requirements of the bottom hole flow field engineering of the positive drilling and milling. The outer end of the bypass water hole 6 can be provided with a bypass valve, so that drilling fluid can be prevented from overflowing from the bypass water hole 6 when no ball is thrown.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a bore and mill logical well workover instrument of dragging for, is including instrument body (1) that is round bar column structure, and the lower extreme of this instrument body (1) has boring and milling head (2), its characterized in that: the utility model discloses a tool body, including instrument body (1), the outer peripheral face of instrument body (1) is equipped with from down up bailing groove (3) that set up side by side, and the external diameter of each bailing groove (3) is the same, and the notch of each bailing groove (3) all is towards the upper end of instrument body (1), boring and milling head (2) are in instrument body (1) along circumference protrusion, have offered a plurality of reverse circulation hole (4) along circumference distribution on this boring and milling head (2), and each reverse circulation hole (4) all runs through the up-and-down terminal surface of boring and milling head (2).

2. The drilling and milling dredging and workover tool of claim 1, wherein: the sand bailing groove (3) comprises a sand bailing groove wall (3 a) with a circular ring structure and a sand bailing groove bottom (3 b) with a conical surface structure, and the sand bailing groove bottom (3 b) extends to the outer wall of the tool body (1) from the lower edge of the corresponding sand bailing groove wall (3 a) in an inward inclined mode.

3. The drilling and milling dredging and workover tool of claim 2, wherein: the oblique angle alpha of the bottom (3 b) of the sand bailing groove is smaller than 45 degrees.

4. The drilling and milling dredging and workover tool of claim 1, wherein: the reverse circulation hole (4) is obliquely arranged from top to bottom along the radial inward direction of the drilling and milling head (2).

5. The drilling and milling dredging and workover tool of claim 1, wherein: the utility model discloses a ball-throwing device, including instrument body (1), ball-throwing section (5 a), a plurality of bypass water eyes (6) are offered to the lower extreme of this center water eye (5), and the lower extreme of this center water eye (5) runs through the lower terminal surface of boring cutter head (2) downwards, instrument body (1) divide into instrument upper segment and instrument middle lower segment from the top down in proper order, and each bailing groove (3) are along axial distribution on the outer peripheral face of instrument middle lower segment, the upper portion hole expansion of center water eye (5) forms ball-throwing section (5 a), and the lower extreme of this ball-throwing section (5 a) forms ball-throwing seat (5 b) that is the conical surface structure, a plurality of bypass water eyes (6) have been offered to the circumference of ball-throwing section (5 a), and the outer end of each bypass water eye (6) runs through the outer wall of instrument upper segment.

6. The drilling and milling dredging and workover tool of claim 1, wherein: the lower end face of the drilling and milling head (2) is uniformly provided with downwardly protruding inserts (7).

7. The drilling and milling dredging and workover tool of claim 6, wherein: the number of the inserts (7) is nine, every three inserts (7) which are annularly and uniformly distributed form an insert group, and the three insert groups are sequentially distributed along the radial direction of the drilling and milling head (2) from inside to outside.

8. The drilling and milling dredging and workover tool of claim 7, wherein: three inserts (7) of one insert group positioned at the outermost side are protruded out of the outer peripheral surface of the drilling and milling head (2).

9. The drilling and milling dredging and workover tool of claim 1, wherein: the tool body (1) and the drilling and milling head (2) are integrally formed.

10. The drilling and milling dredging and workover tool according to claim 1 or 9, wherein: the drilling and milling head (2) and each sand bailing groove (3) are integrally formed.