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CN-121993031-A - Drilling fluid internal-inlet and internal-outlet type petroleum drilling system

CN121993031ACN 121993031 ACN121993031 ACN 121993031ACN-121993031-A

Abstract

The invention discloses a drilling fluid internal inlet and internal outlet type petroleum drilling system which comprises a base, wherein the base is horizontally arranged on the ground, a through hole is formed in the middle of the base, a transverse plate is arranged above a base pair in a lifting manner, a first motor is arranged above the transverse plate pair, an outer pipe is arranged below the transverse plate pair, the top of the outer pipe is connected with a first motor pair output shaft, a drill bit is arranged at the bottom of the outer pipe, a pore canal is arranged in a penetrating manner and is communicated with the outer pipe, an inner pipe is arranged at the inner side of the outer pipe, a plurality of groups of adjusting components are arranged below the inner pipe, each group of adjusting components are connected with the inner side wall of the outer pipe, the size of an opening at the upper end of a space formed by the plurality of groups of adjusting components is larger than the size of an opening at the lower end of the space, and a water pump and a liquid tank are arranged on the base, and can control the liquid tank to pass in and out the inner pipe and the outer pipe through the inner pipe.

Inventors

  • Yu Zhanmiao
  • WANG XIANG
  • CHEN FUHU
  • ZHANG HUI
  • NIU SICHENG
  • CUI TANGBO

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司华北油气分公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (7)

  1. 1. The drilling fluid internal inlet and outlet type petroleum drilling system is characterized by comprising a base (2), wherein the base (2) is horizontally placed on the ground, a through hole is formed in the middle of the base, a transverse plate (12) is arranged above the base (2) in a lifting mode, a first motor (4) is arranged above the transverse plate (12), an outer tube (13) is arranged below the transverse plate, the top of the outer tube (13) is connected with an output shaft of the first motor (4), a drill bit (15) is arranged at the bottom of the outer tube, the drill bit (15) penetrates through a pore canal and is connected with the outer tube (13), an inner tube (14) is arranged on the inner side of the outer tube (13), a plurality of groups of adjusting components are arranged below the inner tube (14), each group of adjusting components is connected with the inner side wall of the outer tube (13), the size of an opening at the upper end of a space formed by the groups of adjusting components is larger than the size of the opening at the lower end, and a water pump and a liquid tank is further arranged on the base (2), and the water pump can control the liquid tank to enter and exit the inner tube (14) and the outer tube (13).
  2. 2. An in-and-out-of-drilling-fluid petroleum drilling system according to claim 1, characterized in that the adjusting assembly comprises a first rod (18), a connecting plate (19) and a third rod (20), wherein the connecting plate (19) is arranged obliquely, one ends of the first rod (18) and the second rod, which are adjacent to each other, are respectively connected with the upper end and the lower end of the connecting plate (19), and one ends, which are far away from each other, are connected with the inner side of the outer tube (13).
  3. 3. The drilling fluid internal-inlet and internal-outlet type petroleum drilling system according to claim 2, wherein a plurality of balls (17) are embedded on the outer side surface of the inner tube (14), a plurality of groups of balls (17) are distributed up and down, a plurality of bolts (16) are fixedly arranged on the inner side wall of the outer tube (13) along the circumferential direction of the inner tube (14) in each group, a plurality of groups of bolts (16) are distributed up and down, and a plurality of bolts (16) are uniformly distributed in each group along the circumferential direction of the outer tube (13).
  4. 4. A drilling fluid in-out and in-in oil drilling system according to claim 3, characterized in that a plurality of sets of said balls (17) are in direct contact with a plurality of sets of pins (16) and that the balls (17) are in contact with the pins (16).
  5. 5. The drilling fluid in-and-out type petroleum drilling system according to claim 1, wherein the fluid tank is provided with a fluid inlet tank (8) and a fluid return tank (9), the fluid inlet tank (8) and the fluid return tank (9) are distributed on the outer side of the outer tube (13), and a first water pump (10) and a second water pump (11) are respectively arranged on the side edges of the fluid inlet tank (8) and the fluid return tank (9).
  6. 6. The oil drilling system with the internal inlet and the internal outlet of the drilling fluid according to claim 5, wherein the fluid inlet box (8) is connected with the input end of the first water pump (10), the output end of the first water pump (10) is connected with the inner pipe (14), the fluid return box (9) is connected with the output end of the second water pump (11), and the input end of the second water pump (11) is connected with the outer pipe (13).
  7. 7. The oil drilling system of claim 1, wherein a second motor (5) is arranged above the base (2), the second motor (5) is arranged upside down, a screw (6) is fixedly connected to the output shaft, and threads of the screw (6) penetrate through the end part of the transverse plate (12).

Description

Drilling fluid internal-inlet and internal-outlet type petroleum drilling system Technical Field The invention relates to the technical field of petroleum drilling and production, in particular to a drilling fluid internal-inlet and internal-outlet type petroleum drilling system. Background The drilling fluid density window is narrow, which is easy to cause the occurrence of instability of the well wall, damage of a leakage reservoir and other complex drilling situations, and severely restricts the development speed and economic benefit of oil and gas resources. The problem caused by the narrow window of the drilling fluid tightness brings great difficulty and risk to practical construction. Factors influencing the drilling fluid density window mainly comprise formation characteristics, mainly related to geological conditions, engineering design, narrow density windows formed by drilling difficulty increased due to unreasonable engineering design, and drilling operations such as larger pumping and exciting pressure caused by too high tripping speed, too high annulus reverse speed of drilling fluid, too long exposure time of a borehole and the like. Therefore, the drilling fluid density window needs to be expanded, the annular pressure consumption is reduced, and the circulation pressure consumption is accurately controlled to perform normal drilling. In order to solve the problems, a Chinese patent with the publication number of CN108316892B discloses an internal-inlet and internal-outlet type petroleum drilling system for drilling fluid, which comprises a drilling derrick, a drilling fluid inlet tank, a drilling fluid pressurizing pump, a drilling fluid recovery tank, a wellhead blowout preventer, a drilling rod assembly, a stratum sealing cylinder and a drill bit, wherein the drilling rod assembly comprises a plurality of drilling rod units which are sequentially connected, each drilling rod unit is internally provided with a drilling rod baffle, the front side and the rear side of each drilling rod baffle are in sealing contact with the inner wall of the drilling rod unit, the drilling rod baffles are fixed in the drilling rod units through baffle fixing assemblies, the drilling rod baffles arranged in different drilling rod units are connected through baffle connecting assemblies, the drilling rod baffles divide the inside of the drilling rod assembly into a left drilling fluid output channel and a right drilling fluid input channel, and the drilling fluid can be input and output in the inside the drilling rod assembly by virtue of the drilling fluid recovery pump, the drilling fluid is prevented from being lost in a large amount, meanwhile, the drilling fluid is recycled, and the drilling fluid cost is reduced. However, when the device pumps back the drilling fluid, the drilling fluid enters the stratum sealing cylinder from the drill bit working position in the space below the stratum sealing cylinder through the three first drilling fluid exchange holes of the stratum sealing cylinder, then enters the drill bit fixing rod through the second drilling fluid exchange holes arranged on the left semicircle of the drill bit fixing rod, and is pumped into the drilling fluid recovery tank along the drilling fluid output channel. Disclosure of Invention The invention aims to provide an oil drilling system with an internal inlet and an internal outlet of drilling fluid, which aims to solve the problems of the background technology. The invention discloses a drilling fluid internal inlet and internal outlet type petroleum drilling system which is realized by comprising a base, wherein the base is horizontally arranged on the ground, a through hole is formed in the middle of the base, a transverse plate is arranged above a pair of base in a lifting manner, a first motor is arranged above the transverse plate pair, an outer pipe is arranged below the transverse plate pair, the top of the outer pipe is connected with an output shaft of the first motor pair, a drill bit is arranged at the bottom of the outer pipe, a pore canal is arranged through the drill bit and is communicated with the outer pipe, an inner pipe is arranged at the inner side of the outer pipe, a plurality of groups of adjusting components are arranged below the inner pipe, each group of adjusting components is connected with the inner side wall of the outer pipe, the size of an opening at the upper end of a space formed by the plurality of groups of adjusting components is larger than the size of an opening at the lower end of the space, and a water pump and a liquid tank are further arranged on the base, and the water pump can control the liquid tank to pass in and out the inner pipe and the outer pipe. Preferably, the adjusting component comprises a first rod, a connecting plate and a third rod, the connecting plate is obliquely arranged, one ends of the first rod and the second rod which are mutually adjacent are respectively connected with th