CN214997548U

CN214997548U - Large-diameter drilling and bailing device for coal field

Info

Publication number: CN214997548U
Application number: CN202120884342.XU
Authority: CN
Inventors: 朱能闯
Original assignee: China National Administration Of Coal Geology First Exploration Bureau Geological Exploration Institute
Current assignee: China National Administration Of Coal Geology First Exploration Bureau Geological Exploration Institute
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-12-03
Anticipated expiration: 2031-04-27

Abstract

The utility model discloses a large-diameter drilling and bailing device for coal field, which is applied to the field of geological drilling and comprises a sleeve fixedly arranged on a drill rod, wherein the sleeve is fixed with the drill rod through an annular steel plate and a support plate, a space for storing rock debris is formed among the sleeve, the drill rod and the annular steel plate, a water outlet is arranged on the pipe wall of the sleeve, and the diameter of the water outlet is smaller than that of the rock debris; the utility model discloses simple structure, implementation convenience can in time take out ground from the hole bottom with the detritus that the reaming creeps into formation, ensure hole bottom safety in production, stop the emergence of adding the pole difficulty and burying the brill accident.

Description

Large-diameter drilling and bailing device for coal field

Technical Field

The utility model relates to a geological drilling field, specific coal field heavy-calibre drilling bailing device that says so.

Background

Rock debris is rock particles that are ground or broken by the drill bit during drilling. Normally, the debris is carried out of the hole and out of the ground along with the circulation of the washing liquid, and enters the washing liquid purification equipment to be treated and deposited.

Heavy-calibre drilling creeps into the in-process and uses reamer bit enlarged bore diameter, creeps into the broken rock particle of in-process drill bit and falls into former aperture in the reaming, not through abundant grinding and breakage, and the rock debris that forms surpasss flush fluid circulation carrying capacity, and when the flush fluid stop cycle, the rock debris is gathered in the hole bottom, and after the hole bottom rock debris surpassed a certain amount, easily caused the pole difficulty or the buried drilling accident appears.

In order to ensure the safety of reaming drilling, aiming at the problem that rock debris formed by reaming drilling cannot be taken out of the ground along with washing liquid in a circulating manner, a product is necessary to be developed to timely take out the rock debris from the well in combination with the field drilling construction condition.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a coal field heavy-calibre drilling bailing device is provided, can creep into the reaming formation, can not in time take out ground from the hole bottom along with the detritus that flush fluid circulation took out ground, ensure the safety in production of well drilling.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model discloses a fixed sleeve pipe that sets up on the drilling rod, the sleeve pipe passes through annular steel sheet, backup pad and drilling rod fixed, forms the space that supplies the detritus to deposit between sleeve pipe, drilling rod and annular steel sheet, the outlet has been seted up on the sheathed tube pipe wall, the diameter of outlet is less than the diameter of detritus.

The utility model discloses a further improvement lies in: the water drainage holes are uniformly distributed on the pipe wall of the sleeve.

The utility model discloses a further improvement lies in: the annular steel plate is fixedly arranged at the bottom of the sleeve, and the top of the sleeve is fixed with the drill rod through the support plate.

The utility model discloses a further improvement lies in: the sleeve is provided with a sand discharge hole, and a sand discharge window is movably arranged at the sand discharge hole.

The utility model discloses a further improvement lies in: one side of the sand discharge window is connected with the sleeve through a welding point, and the other side of the sand discharge window is movably connected with the sleeve through a supporting strip fixed on the inner side of the sand discharge window.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains is:

the utility model discloses simple structure, preparation convenience can in time take out ground from the hole bottom with the detritus that the reaming creeps into formation, ensure hole bottom safety in production, stop the emergence of adding the pole difficulty and burying the brill accident.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Wherein, 1, an annular steel plate; 2. a supporting strip; 3. a sand discharge window; 4. a sleeve; 5. a water drain hole; 6. a support plate; 7. and (5) drilling a rod.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

a large-caliber drilling and bailing device for a coal field is shown in figure 1 and comprises a sleeve 4 fixedly arranged on a drill rod 7, wherein the sleeve 4 can be an iron pipe, the bottom of the sleeve 4 is fixed with the drill rod 7 through an annular steel plate 1, and the top of the sleeve 4 is fixed with the drill rod 7 through a support plate 6. The casing 4 is firmly fixed on the drill rod 7 through the annular steel plate 1 and the supporting plate 6, so that the drill rod 7 and the casing 4 are arranged integrally, and a space for storing rock debris is formed among the casing 4, the drill rod 7 and the annular steel plate 1.

The pipe wall of the casing pipe 4 is provided with the water drainage holes 5, the water drainage holes 5 are uniformly distributed on the pipe wall of the casing pipe 4, and the diameter of the water drainage holes 5 is smaller than that of rock debris, so that the rock debris is prevented from being discharged from the water drainage holes 5. This allows the flushing liquid in the casing to drain through the drainage openings 5 while debris remains in the casing 4.

In order to smoothly discharge the rock debris from the casing 4, a sand discharge hole is formed in the bottom of the casing 4, and a sand discharge window 3 is movably arranged at the sand discharge hole. One side of the sand discharge window 3 is connected with the sleeve 4 through a welding point, and the other side of the sand discharge window is movably connected with the sleeve 4 through a supporting bar 2 fixed on the inner side of the sand discharge window 3. The setting of support bar 2 and welding point can prevent effectively that sand discharge window 3 from droing from sleeve pipe 4. When rock debris needs to be discharged from the casing 4, the welding point is separated from the casing 4 by using a tool, then the lower sand discharge window 3 is taken out, the rock debris in the casing 4 can be smoothly discharged from the casing 4, the upper sand discharge window 3 is arranged after the rock debris is discharged, the welding point is welded and fixed with the casing 4, and the sand discharge window 3 is closed.

In the implementation process, different diameters of the sleeve 4 can be set according to different hole enlarging hole diameters, and the production requirements can be met. At the bottom of with this device lower inlet hole, circulation flush fluid makes the detritus become the suspension form, then stop circulation flush fluid, the detritus of suspension falls into sleeve pipe 4 under the action of gravity in, and the flush fluid is discharged from outlet 5, and above-mentioned action is repeated many times, and until the detritus is full of sleeve pipe 4, the extraction drill way, open the sand discharging window 3 and discharge the detritus from sleeve pipe 4 is interior. After the rock debris is discharged, the sand discharging window 3 is closed, and the sand is lowered to the bottom of the hole again to realize sand bailing again.

Finally, it should be noted that: the above examples are merely illustrative for the clarity of the present invention and are in no way intended to limit the scope of the invention. It will be apparent to those skilled in the art that many more modifications and variations than mentioned above are possible in light of the above teaching, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed.

Claims

1. The utility model provides a coal field heavy-calibre drilling bailing device which characterized in that: including fixed sleeve pipe (4) that sets up on drilling rod (7), sleeve pipe (4) are fixed with drilling rod (7) through annular steel sheet (1), backup pad (6), form the space that supplies the detritus to deposit between sleeve pipe (4), drilling rod (7) and annular steel sheet (1), outlet (5) have been seted up on the pipe wall of sleeve pipe (4), the diameter of outlet (5) is less than the diameter of detritus.

2. The large-caliber drilling bailing device for the coal field according to claim 1, wherein: the water drainage holes (5) are uniformly distributed on the pipe wall of the casing pipe (4).

3. The large-caliber drilling bailing device for the coal field according to claim 1, wherein: the annular steel plate (1) is fixedly arranged at the bottom of the casing pipe (4), and the top of the casing pipe (4) is fixed with the drill rod (7) through the support plate (6).

4. The large-caliber drilling bailing device for the coal field according to claim 3, wherein: the sleeve (4) is provided with a sand discharge hole, and a sand discharge window (3) is movably arranged at the sand discharge hole.

5. The large-caliber drilling bailing device for the coal field according to claim 4, wherein: one side of the sand discharge window (3) is connected with the sleeve (4) through a welding point, and the other side of the sand discharge window is movably connected with the sleeve (4) through a support bar (2) fixed on the inner side of the sand discharge window (3).