CN216381276U - Drilling tool for reducing bottom hole pressure - Google Patents
Drilling tool for reducing bottom hole pressure Download PDFInfo
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- CN216381276U CN216381276U CN202121765945.4U CN202121765945U CN216381276U CN 216381276 U CN216381276 U CN 216381276U CN 202121765945 U CN202121765945 U CN 202121765945U CN 216381276 U CN216381276 U CN 216381276U
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- hole pressure
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Abstract
The utility model discloses a drilling tool for reducing bottom hole pressure, which mainly comprises a male buckle, a body, blades and a female buckle, wherein the blades are fixed on the body and are uniformly distributed around the body. The lower end of the female buckle of the tool is connected with a drill bit, the upper end of the female buckle of the tool is connected with a screw drilling tool, and the screw drilling tool rotates to drive the blades to rotate clockwise under the state of opening the pump, so that upward lift force is generated on drilling fluid at the well bottom, a local low-pressure area is formed at the position below the blades, the pressing and holding effect of the drilling fluid on the well bottom is favorably reduced, the rock carrying effect is improved, and the mechanical drilling speed is improved. The tool has the characteristics of simple structure, low cost, safety and reliability.
Description
Technical Field
The utility model relates to the technical field of petroleum engineering drilling tools, in particular to a drilling tool for reducing bottom hole pressure, which is mainly matched with a screw drilling tool for construction, reduces the pressure holding effect and improves the mechanical drilling speed.
Background
Along with the advance of petroleum exploration and development to middle and deep strata, the stratum pressure is higher and higher, the drillability is poorer and poorer, the mechanical drilling speed is slower and slower, and the problems of long drilling period and high construction cost are difficult to effectively solve. The liquid column pressure generated by the drilling fluid in the drilling construction process not only increases the hardness of rocks at the bottom of a well, but also generates positive pressure on the rock crushing surface, so that frictional resistance is formed along the crushing surface, and the frictional resistance prevents rock debris which is separated from the rock surface from leaving the bottom of the well to form a pressure holding effect, so that repeated cutting is caused, the mechanical drilling speed is slow, and the speed increasing and efficiency improving means is limited.
At present, the pressure reduction and speed increase are good means, for example, a gas/nitrogen drilling mode and other modes are adopted, the mechanical drilling speed is usually more than 5 times of that of drilling fluid during drilling, but due to the lack of support of the pressure of a drilling fluid column on a well wall, the situation of well bore collapse often occurs, or the drilling is in contact with stratum water and cannot be carried out gas/nitrogen drilling continuously, so the application range of the drilling tool is greatly limited. If the bottom hole pressure holding effect is required to be reduced under the condition of liquid phase drilling fluid, higher drilling fluid discharge and higher drill bit water power are required, so that high requirements are put on equipment, and the existing drilling field equipment is often difficult to meet the construction requirements.
The prior art is searched, a bottom hole pressure reducing tool is basically not used, the inquired past patent documents mainly adopt a mode of a backward nozzle to reduce the bottom hole pressure, a drill bit is small, and the method is mainly applied to a radial drilling technology. The pressure reducing tool described in chinese patent No. 201218066Y (downhole pressure reducing tool) also achieves downhole flow diversion by means of a multi-stage pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a drilling tool for reducing bottom hole pressure.
The utility model discloses a patent is originated from reducing bottom hole pressure and improves mechanical drilling speed needs, through adding this instrument of connecing between drill bit and screw rod drilling tool, can effectively reduce bottom hole pressure, improves mechanical drilling speed. The tool is simple in structure, convenient to use, high in safety and high in applicability.
The technical scheme is as follows:
a drilling tool for reducing the pressure at bottom of well is composed of male fastener, main body, blades, female fastener and water hole. The blades are positioned on the upper part of the body; the body and the blade form a whole.
The number of the blades surrounding the body can be 3-10.
The blades surrounding the body can be distributed horizontally in the circumferential direction of the body or spirally on the body.
The tool blade rotates clockwise under the drive of the screw drill, thereby providing the lifting force of drilling fluid, reducing the bottom hole pressure, reducing the pressure holding effect and improving the mechanical drilling speed.
The utility model has the beneficial effects that:
the blades are fixed on the tool body, the upper male buckle is connected with the screw drilling tool, the lower female buckle is connected with the drill bit, the power of high-speed rotation of the screw drilling tool is utilized, the lifting force for additionally improving the upward flow of drilling fluid is generated at the position of the drill bit at the well bottom, and finally, local low pressure is formed at the well bottom, so that the pressure at the well bottom is favorably reduced, the pressure holding effect of drilling cuttings is reduced, and the mechanical drilling speed is improved.
After adopting such structure, can effectively reduce bottom hole pressure, reduce and press and hold the effect, improve and continue the drilling speed, this instrument lower extreme is connected the drill bit, upper end connection screw rod drilling tool, does not own have power, mainly relies on the power that screw rod drilling tool provided in the pit to drive to produce corresponding effect, and the screw rod drilling tool rotational speed is higher, and power is stronger more, and the effect is better. The novel safety device is simple in structure, convenient to use, high in safety and strong in applicability.
Drawings
FIG. 1 is an elevation view of a drilling tool lowering bottom hole pressure.
FIG. 2 is a top view of a drilling tool lowering bottom hole pressure.
FIG. 3 is a schematic representation of an external view of a downhole tool for reducing bottom hole pressure.
The labels in the figure are: 1. male buckle, 2 body, 3 blade, 4 box, 5 water hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1, 2 and 3, the drilling tool for reducing the bottom hole pressure comprises a male buckle 1, a body 2, a blade 3, a female buckle 4 and a water hole 5.
The number of the blades 3 surrounding the body may be 3 to 10. The shape of the blade 3 is oval or the like. The blade 3 may be of a symmetrical or asymmetrical structure. The blades 3 surrounding the body can be horizontally distributed along the circumferential direction of the body 2, and can also be spirally distributed along the body 2.
The diameters of the body 2 and the blade 3 can be respectively the following combinations: 197 + -5 mm and 236 + -3 mm; 172 plus or minus 5mm and 210 plus or minus 3 mm; 127 plus or minus 3mm and 160 plus or minus 3 mm;
the lower end of the female buckle 4 is connected with a drill bit, the upper end male buckle 1 is connected with a screw drilling tool, the screw drilling tool rotates to drive the blade 3 to rotate clockwise under the state of opening the pump, so that upward lift force is generated on drilling fluid at the well bottom, a local low-pressure area is formed at the position below the blade, the pressing effect of the drilling fluid on the well bottom is reduced, the rock carrying effect is improved, the mechanical drilling speed is improved, the rotating speed of the screw drilling tool is higher, the power is stronger, and the effect is better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A well drilling tool for reducing bottom hole pressure comprises a body (2), wherein a male buckle (1) is arranged at the upper end of the body (2), a female buckle (4) is arranged at the lower end of the body, a water hole (5) is formed inside the body, and the well drilling tool is characterized in that blades (3) are arranged outside the body (2).
2. A downhole tool for lowering bottom hole pressure according to claim 1, wherein the number of blades (3) is 3-10.
3. A downhole tool for lowering bottom hole pressure according to claim 2, wherein the blades (3) are oval or triangular with rounded corners.
4. A downhole tool for lowering bottom hole pressure according to claim 3, wherein the blades (3) are evenly distributed circumferentially around the body (2).
5. A downhole tool for lowering bottom hole pressure according to claim 4, wherein the blades (3) are arranged helically around the body (2).
6. A downhole tool for lowering bottom hole pressure according to claim 5, wherein the diameters of the body (2) and the blades (3) comprise the combination of:
197 + -5 mm and 236 + -3 mm; 172 plus or minus 5mm and 210 plus or minus 3 mm; 127 + -3 mm and 160 + -3 mm.
7. A well drilling tool for reducing the bottom hole pressure according to claim 6, characterized in that the lower end of the tool female button (4) is connected with a drill bit, the upper end male button (1) is connected with a screw drill, and in the pump opening state, the screw drill rotates to drive the blades (3) to rotate clockwise, so that upward lifting force is generated on the bottom hole drilling fluid, and a local low pressure area is formed below the blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121765945.4U CN216381276U (en) | 2021-07-30 | 2021-07-30 | Drilling tool for reducing bottom hole pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121765945.4U CN216381276U (en) | 2021-07-30 | 2021-07-30 | Drilling tool for reducing bottom hole pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381276U true CN216381276U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121765945.4U Active CN216381276U (en) | 2021-07-30 | 2021-07-30 | Drilling tool for reducing bottom hole pressure |
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| CN (1) | CN216381276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117046890A (en) * | 2023-09-11 | 2023-11-14 | 滨州市生态环境服务中心 | Method for in-situ remediation of phosphorus contaminated soil |
-
2021
- 2021-07-30 CN CN202121765945.4U patent/CN216381276U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117046890A (en) * | 2023-09-11 | 2023-11-14 | 滨州市生态环境服务中心 | Method for in-situ remediation of phosphorus contaminated soil |
| CN117046890B (en) * | 2023-09-11 | 2024-02-13 | 滨州市生态环境服务中心 | Method for in-situ remediation of phosphorus contaminated soil |
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