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A shock-absorbing pulse speed booster and drilling tool system

A speed booster and pulse technology, which is applied in the direction of drilling with vibration, can solve the problems of limited rock breaking energy, inability to effectively reduce the vicious vibration phenomenon, and inability to effectively improve the compressive strength and the ROP of heterogeneous formations. The effect of rock energy, maintaining stability and maintaining WOB

Active Publication Date: 2022-04-19
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, on the one hand, there is no shock-absorbing mechanism inside the power drilling tools such as screw and turbine to stabilize the WOB fluctuation generated during the rock breaking process of the drill bit, which cannot effectively reduce the vicious vibration of the drill bit when drilling into igneous rock or conglomerate formations; on the other hand On the one hand, power drilling tools such as screw and turbine only rely on the output of large torque and high speed to assist the drill bit to break rocks. The rock breaking energy is limited, and the ROP in high compressive strength and heterogeneous formations cannot be effectively improved.

Method used

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  • A shock-absorbing pulse speed booster and drilling tool system
  • A shock-absorbing pulse speed booster and drilling tool system
  • A shock-absorbing pulse speed booster and drilling tool system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The shock-absorbing pulse speed booster provided by the embodiment of the present invention is composed of a housing assembly, a bearing assembly, a pressure pulse mechanism and a shock-absorbing and stabilizing mechanism. Among them, the shell assembly includes the upper shell 3, the lower shell 9 and the lower joint 15; the bearing assembly includes the radial bearing moving ring 1, the radial bearing stationary ring 2, the series bearing group 5 and the spacer 7; the pressure pulse The mechanism includes upper transmission shaft 4, nut 6, spacer 7, bushing 8, adjusting disc 10 and bolt 16; the shock-absorbing and pressure-stabilizing mechanism includes elastic element 11, sliding sleeve 12, connecting shaft 13, lower transmission shaft 15, first seal Ring 17 and the second sealing ring 18.

[0073] like Figure 1 to Figure 8As shown, the upper casing 3 is equipped with a radial bearing moving ring 1, a radial bearing stationary ring 2 and a series bearing group 5, a...

Embodiment 2

[0076] like figure 1 As shown, in the first embodiment, the elastic element 11 is a cylindrical coil spring, and the transmission surface 19 is a regular hexagon. The difference between the second embodiment and the first embodiment is that the types of the elastic element 11 and the transmission surface 19 are different. In the second embodiment, the elastic element 11 is a disk spring, and the transmission surface 19 is a regular octagon.

[0077] According to the above technical solution, it can be seen that the working principle of the pulsating impact of a shock-absorbing pulse speed booster provided by the present invention: during the drilling process, on the one hand, the upper transmission shaft 4 rotates, and drives the connecting shaft 13 and the lower transmission shaft 15 to rotate, In this way, the rotation speed and torque are transmitted to the lower drill bit to realize high-speed cutting and rock breaking; on the other hand, the housing assembly does not move...

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Abstract

The invention discloses a shock-absorbing pulse speed booster, which comprises a housing assembly, a bearing assembly, a pressure pulse mechanism and a shock-absorbing and stabilizing mechanism, and is characterized in that the upper transmission shaft in the pressure pulse mechanism rotates, while the housing assembly is fixed When the adjusting disc does not move, the cross-sectional area between the upper flow channel and the lower flow channel changes periodically, which causes the pressure energy of the drilling fluid flowing into the upper cavity to change, thereby generating periodic axial pulsation impact force and improving the drill bit pulse rate. Rock-breaking energy; when the drilling pressure is too large or insufficient, the axial vibration of the drill bit is absorbed through the storage and release of the elastic element in the shock-absorbing and pressure-stabilizing mechanism to maintain the stability of the drilling pressure. The shock-absorbing pulse speed booster provided by the invention is connected with the power end of the screw drilling tool or turbo drilling tool, which can not only realize the shock-absorbing and voltage-stabilizing function, but also generate axial high-frequency pulsating impact energy, so as to improve the working environment of the drill bit and improve the performance of the drill bit. The purpose of breaking rock energy.

Description

technical field [0001] The invention relates to the technical fields of oil and gas exploration, geological exploration and geothermal well development, in particular to a shock-absorbing pulse speed booster. Background technique [0002] As oil and gas exploration and development expand toward deep and piedmont structural belts, igneous rock or glutenite formations are often encountered, and when drilling in such heterogeneous formations with high compressive strength, the outstanding performance is slow average ROP, The consumption of the drill bit is large, and the downhole drilling system often has the phenomenon of suffocating and skipping the drill, which may cause the drill bit to break and drop teeth, and the drill pipe may break and other problems. [0003] Nowadays, power drilling tools such as screw and turbine are widely used in the industry for speed-up operations due to their advantages such as high torque and high speed. But at the same time, on the one hand,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/24
CPCE21B7/24
Inventor 甘心李伟廷侯树刚兰凯王惠文晁文学
Owner 中石化石油工程技术服务有限公司