阅读说明：本技术 一种钻井泵超压报警自停装置 (Overpressure alarm automatic stop device for drilling pump ) 是由 庞应刚 罗恒荣 梁文云 谭勇 田相众 付存国 罗鹏飞 李�东 李志武 鄢中维 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种钻井泵超压报警自停装置,包括钻井泵离合器供气管路和钻井泵排出管汇,所述钻井泵离合器供气管路包括依次连接成气路的气源、常闭继气器、快速放气阀和钻井泵离合器,气源、换向阀、常开继气器依次连接成常闭继气器的控制气路,气源、调压阀、两用继气器、单向阀、按钮阀依次连接成常开继气器的控制气路,两用继气器和单向阀之间的气路上设置有汽笛,钻井泵排出管汇连接压力变送传感器形成两用继气器的控制液路。本发明采用两用继气器差压控制方式,以压力变送传感器油压和气源压力压力差所产生的作用控制钻井泵控制源,实现对高压的自动报警和钻井泵的自停。(The invention discloses an overpressure alarm automatic stop device for a drilling pump, which comprises a drilling pump clutch air supply pipeline and a drilling pump discharge manifold, wherein the drilling pump clutch air supply pipeline comprises an air source, a normally closed gas relay, a quick release valve and a drilling pump clutch which are sequentially connected into an air circuit, the air source, a reversing valve and a normally open gas relay are sequentially connected into a control air circuit of the normally closed gas relay, the air source, a pressure regulating valve, a dual-purpose gas relay, a one-way valve and a button valve are sequentially connected into a control air circuit of the normally open gas relay, a steam whistle is arranged on the air circuit between the dual-purpose gas relay and the one-way valve, and the drilling pump discharge manifold is connected with a pressure transmitting sensor to form a control liquid circuit of the dual-purpose gas. The invention adopts a differential pressure control mode of a dual-purpose gas relay, controls a control source of the drilling pump by the action generated by the pressure difference between the oil pressure of the pressure transmitting sensor and the pressure of the air source, and realizes the automatic alarm of high pressure and the automatic stop of the drilling pump.)

1. The utility model provides a drilling pump superpressure warning stop motion, includes drilling pump clutch air supply line and drilling pump discharge manifold, drilling pump clutch air supply line is including the air supply, normally closed gas relay, quick bleed valve and the drilling pump clutch that connect gradually the gas circuit, its characterized in that: the pressure transmitting device comprises a pressure transmitting sensor, a dual-purpose gas relay, a pressure regulating valve, a one-way valve, a button valve, a normally open gas relay and a reversing valve, wherein a gas source, the reversing valve and the normally open gas relay are sequentially connected and connected into a control port of the normally closed gas relay to form a control gas circuit of the normally closed gas relay, the gas source, the pressure regulating valve, the dual-purpose gas relay, the one-way valve and the button valve are sequentially connected and connected into a control port of the normally open gas relay to form a control gas circuit of the normally open gas relay, a steam whistle is arranged on a gas circuit between the dual-purpose gas relay and the one-way valve, and a discharge manifold of the drilling pump is connected with the pressure transmitting sensor and then connected with the control port of the dual-purpose gas relay to form.

2. An overpressure alarm stop motion device for a drill pump according to claim 1, characterized in that: and the discharge manifold of the drilling pump is connected with a pressure gauge.

3. Drilling pump overpressure alarm stop motion according to claim 1 or 2, characterized in that: and a switch valve is arranged between the air source and the pressure regulating valve on a control air path of the normally open air relay.

Technical Field

The invention relates to a safety protection device for drilling pump equipment.

Background

The drilling pump is an important component of a drilling fluid circulating system and provides power for the drilling fluid. With the development of well drilling and the use of novel speed-up tools, the well drilling pump is further propelled towards the direction of high power and high pump pressure, and the requirements on the working reliability and safety of the well drilling pump are higher and higher. The well drilling pump works under high pump pressure for a long time, and the safety risk is increased, so that the safety protection of the well drilling pump as pump equipment becomes more and more important.

Disclosure of Invention

The invention aims to: the overpressure alarm automatic stop device of the drilling pump is used for triggering an alarm and controlling the stop of the drilling pump by depending on the pressure of the liquid discharged by the drilling pump when the drilling pump discharges the liquid with overpressure.

In order to achieve the purpose, the invention provides the following technical scheme: an overpressure alarm automatic stop device of a drilling pump comprises an air supply pipeline of a drilling pump clutch and a drilling pump discharge manifold, wherein the air supply pipeline of the drilling pump clutch comprises an air source, a normally closed gas relay, a quick release valve and a drilling pump clutch which are sequentially connected into an air circuit, and further comprises a pressure transducer, a dual-purpose gas relay, a pressure regulating valve, a one-way valve, a button valve, a normally open gas relay and a reversing valve, the air source, the reversing valve and the normally open gas relay are sequentially connected and connected into a control port of the normally closed gas relay to form a control air circuit of the normally closed gas relay, the air source, the pressure regulating valve, the dual-purpose gas relay, the one-way valve and the button valve are sequentially connected and connected into a control port of the normally open gas relay to form a control air circuit of the normally open gas relay, a steam whistle is arranged on the air circuit between the dual-purpose gas relay and the one-way valve, the drilling pump discharge manifold is connected, forming a control liquid path of the dual-purpose gas relay.

In order to facilitate observation of the pressure of the drilling fluid output by the drilling pump, a pressure gauge is connected to the discharge manifold of the drilling pump.

For convenient control, a switch valve is arranged between the air source and the pressure regulating valve on a control air path of the normally open air relay.

Compared with the prior art, the invention has the beneficial effects that: the invention adopts a differential pressure control mode of a dual-purpose gas relay, controls a control source of the drilling pump by the action generated by the pressure difference between the oil pressure of the pressure transmitting sensor and the pressure of the air source, and realizes the automatic alarm of high pressure and the automatic stop of the drilling pump. The device eliminates the environmental pollution caused by the shear pin type safety valve and the phenomenon of difficult operation recovery after the pump is stopped. The device can restore the operation of the drilling pump in a short time according to the requirement after the pump is automatically stopped under overpressure. After overpressure, the drilling pump can be stopped quickly. The one-stage protection of the drilling pump is changed into two-stage protection, and the working reliability and safety of the pump are improved. According to the predicted pressure, the pressure value of the stop pump can be set in advance to reduce engineering accidents and economic losses. The operation of the drilling pump can be quickly recovered after the overpressure of the drilling pump is stopped, so that engineering accidents caused by overlong pump stopping time are reduced. The protection device adopts gas circuit control, and is safe and reliable to use.

Drawings

FIG. 1 is a flow chart of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the system comprises a drilling pump discharge manifold, 2, a pressure transmitting sensor, 3, a dual-purpose gas relay, 4, a pressure regulating valve, 5, a switch valve, 6, a gas source, 7, a steam whistle, 8, a one-way valve, 9, a button valve, 10, a normally open gas relay, 11, a reversing valve, 12, a normally closed gas relay, 13, a quick release valve, 14, a drilling pump clutch, 15 and a pressure gauge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the embodiment includes a drilling pump discharge manifold 1, a pressure transducer 2, a dual-purpose relay 3, a pressure regulating valve 4, a switch valve 5, an air source 6, a whistle 7, a one-way valve 8, a button valve 9, a normally open relay 10, a reversing valve 11, a normally closed relay 12, a quick release valve 13 and a drilling pump clutch 14. The drill pump clutch 14 is used to control the drill pump.

The gas source 6, the normally closed gas relay 12, the quick release valve 13 and the drilling pump clutch 14 are sequentially connected into a gas supply pipeline of the drilling pump clutch 14, the gas source 6, the reversing valve 11 and the normally open gas relay 10 are sequentially connected and connected into a control port of the normally closed gas relay 12 to form a control gas circuit of the normally closed gas relay 12, the gas source 6, the switch valve 5, the pressure regulating valve 4, the dual-purpose gas relay 3, the one-way valve 8 and the button valve 9 are sequentially connected and connected into a control port of the normally open gas relay 10 to form a control gas circuit of the normally open gas relay 10, and a steam whistle 7 is arranged on the gas circuit between the dual-purpose gas relay 3 and the one-way valve 8. And a discharge manifold 1 of the drilling pump is connected with the pressure transmitting sensor 2 and then connected with a control port of the dual-purpose gas relay 3 to form a control liquid path of the dual-purpose gas relay 3. The discharge manifold 1 of the drilling pump is connected with a pressure gauge 15.

The pressure transmitting sensor 2 is used for converting a high-pressure hydraulic signal of the drilling fluid output by the drilling pump into a low-pressure hydraulic signal, is a piston type pressure ratio-changing sensor, has a pressure ratio-changing of 36:1, and is supplied to a control end K of the dual-purpose air relay 3. When the hydraulic pressure of the control end is higher than the set pressure of the gas source end A, the valve core of the dual-purpose gas relay 3 acts to convey the compressed gas at the gas source end to the steam whistle 7 from the output end P to realize alarming, meanwhile, the gas enters the control end of the normally open gas relay 10 through the one-way valve 8 and the button valve 9 to close the normally open gas relay 10, the compressed gas conveyed to the control end of the normally closed gas relay 12 through the reversing valve 11 is cut off, the normally closed gas relay 12 is closed, when the gas in the gas bag of the drilling pump clutch 14 reversely flows through the quick release valve 13, the valve core of the quick release valve 13 is pushed, the exhaust port of the quick release valve 13 is opened to release gas, the drilling pump power is cut off to stop running after the drilling pump clutch 14 releases gas, and accordingly automatic.

After the pump is stopped, the check valve 8 automatically locks the gas in the pipeline from the check valve 8 to the control end of the normally open gas relay 10, so that the valve core of the normally open gas relay 10 cannot be automatically reset. When the overpressure fault is eliminated, locked gas is released by operating the button valve 9, the valve core of the normally open gas relay 10 is automatically reset, the control gas path of the normally closed gas relay 12 is opened, the gas supply path of the drilling pump clutch 14 is opened, gas supply to the drilling pump clutch 14 is recovered, and the drilling pump is recovered to operate. The installation of the device does not influence the function of the original safety valve of the drilling pump, and the pump stopping pressure is set to be lower than the shear pin pressure value of the safety valve only during construction, so that the one-stage insurance is changed into the two-stage insurance, and the operation of the drilling pump is safer and more reliable.

The air source end of the dual-purpose air relay 3 is connected with the air source regulated by the pressure regulating valve 4. The pressure regulating valve 4 is used for setting the gas pressure value of the overpressure stop pump to the dual-purpose relay 3. When the hydraulic pressure of the control end of the dual-purpose relay 3 is higher than the set pressure of the gas source end A, the valve core of the dual-purpose gas relay 3 acts, and compressed gas at the gas source end is conveyed to the whistle 7 from the output end P to achieve alarming.

In this particular embodiment: the model of the dual-purpose air relay 3 is QF506, the model of the pressure regulating valve 4 is TIR1020-1, the model of the switch valve 5 is G404.B, the model of the steam whistle 7 is QF533, the model of the one-way valve 8 is CV-0.6, the model of the button valve 9 is 23R1-L8, the model of the normally open air relay 10 is 8096, the model of the reversing valve 11 is QF510, the model of the normally closed air relay 12 is 509, and the model of the quick release valve 13 is KF 514C. The above components are prior art and are not limited to the above models.

The button valve 9 is a valve having three ports, an outlet, an inlet and an exhaust port, the inlet and the outlet are communicated with each other in a normal state, the inlet and the outlet are not communicated with the exhaust port, and the outlet is communicated with the exhaust port when the button is pressed.

The quick release valve 13 is also a valve having three ports, an outlet, an inlet and an exhaust port, the inlet and the outlet are communicated with each other in a normal state, the inlet and the outlet are not communicated with the exhaust port, and in a reverse flow, the inlet pressure of the outlet pushes the valve element to move, so that the outlet is communicated with the exhaust port.

The reversing valve 11 can adopt a two-position three-way reversing valve, and comprises an air inlet and two air outlets, wherein the air inlet and one air outlet are respectively connected with the air source 6 and the normally open air relay 10, and the other air outlet is used for emptying and deflating the air source 6.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.