CN111749651A - A kind of oil and gas leakage collection and constant pressure device - Google Patents

Abstract

The invention provides an oil and gas leakage collection and constant pressure device, comprising a pressure-bearing plate and a closing cover, the pressure-bearing plate is covered on the wellhead of a production well, the closing cover is covered on the pressure-bearing plate, and the closing cover is on the A drilling fluid input box, a drilling fluid recovery box, a petroleum gas collection box and a constant pressure component are connected. The top of the closure cover is provided with an accommodating hole, and a drill pipe is arranged in the accommodating hole. The constant pressure component is used for balanced production. The drilling fluid pressure in the well fluctuates, and the LPG collection tank is used to collect the gas overflowing in the production well. The beneficial effects of the invention are as follows: the constant pressure component connected on the sealing cover can balance the pressure fluctuation of drilling fluid in the production well, so that the pressure in the production well remains unchanged, thereby avoiding the risk of blowout in the process of oil and gas production; the LPG connected on the sealing cover The collection box can collect the LPG and other greenhouse gases overflowing from the mining wells to prevent them from leaking from the mining wells and pollute the environment, thus making the oil and gas mining process green and environmentally friendly.

Description

A kind of oil and gas leakage collection and constant pressure device

technical field

The invention relates to the field of petroleum exploitation devices, in particular to an oil and gas leakage collection and constant pressure device.

Background technique

The oil and gas exploitation of oil usually requires the drilling rig to drive the drill pipe to drill the exploitation well. During the drilling process of the exploitation well, the pressure of the drilling fluid in it will fluctuate due to the pressure change of the formation. When the pressure of the drilling fluid in the exploitation well fluctuates too much, Blowouts are prone to occur in production wells, which leads to safety problems. At the same time, during the drilling process of production wells, a large amount of gas is often spilled from the production well, and these gases are mainly petroleum gas and other greenhouse gases associated with petroleum liquids. Existing oil and gas extraction devices are difficult to solve the problems of LPG leakage and excessive pressure fluctuations of drilling fluids. Therefore, the existing oil and gas extraction devices have the phenomenon of LPG leakage and air pollution during the oil extraction process, and are prone to blowouts. Lead to safety problems; in order to reduce the air pollution problems caused by oil extraction and increase the safety of oil extraction, it is necessary to develop an oil extraction device that can collect LPG in oil extraction wells and balance the pressure fluctuations of drilling fluid in extraction wells.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides an oil and gas leakage collection and constant pressure device, including a pressure bearing plate, a sealing device, a drilling fluid input box, a drilling fluid recovery box, a drill pipe and a constant pressure component, and the pressure bearing plate is fixed on the Above the wellhead of the production well, the closing device is a hemispherical closing cover, the closing cover is covered on the pressure bearing plate, and an accommodating hole is provided on the closing cover, and the accommodating hole is located at the top of the closing cover , and facing the wellhead of the production well, a drill pipe is arranged in the receiving hole, the drill pipe extends into the production well through the receiving hole and the pressure-bearing plate, and a driving turntable is arranged on the top of the drill pipe, and the driving turntable is used for Driven by the drilling rig to drive the drill pipe to rotate and drill, the drilling fluid input box and the drilling fluid recovery box are respectively connected to the closure cover through connecting pipes, and an input pump is arranged in the drilling fluid input box. The input pump is used to input the drilling fluid in the drilling fluid input box into the closure cover, and the drilling fluid recovery box is provided with a pump, and the pump is used to drain the waste drilling fluid in the closure cover. Pumped out to the drilling fluid recovery tank for storage, the constant pressure component includes a first constant pressure pump and a second constant pressure pump, the first constant pressure pump is connected between the drilling fluid input tank and the closing cover, used for mining When the pressure in the well decreases, the drilling hydraulic pressure in the drilling fluid input box is fed into the closure cover to supplement the pressure in the production well so that the pressure in the production well is constant, and the second constant pressure pump is connected between the drilling fluid recovery tank and the closure cover, When the pressure in the production well increases, the waste drilling fluid in the closed cover is pumped out into the drilling fluid recovery box, so as to reduce the pressure in the production well and make the pressure in the production well constant.

Further, the constant pressure device further includes an oil and gas collection assembly, the oil and gas collection assembly includes a petroleum gas collection box, the petroleum gas collection box is connected to the closure cover through a connecting pipe, and the petroleum gas collection box is used for Collects LPG and other greenhouse gases escaping into the wellhead of a production well.

Further, the number of the LPG collection boxes is two, and the two LPG collection boxes are respectively arranged on both sides of the closure cover.

Further, the drilling fluid input box and the drilling fluid recovery box are connected by a circulating pipe, and the circulating pipe is provided with a filter and a circulating pump, and the filter is used to filter out the drilling fluid recovery box. The circulating pump is used for the waste liquid in the drilling fluid recovery box to be filtered and input into the drilling fluid input box, so that the drilling fluid can be recycled.

Further, four edges of the pressure-bearing plate are provided, and each limit hole is provided with a fixed pile, and all the fixed piles are anchored on the ground to anchor the pressure-bearing plate above the wellhead. .

Further, the pressure bearing plate is provided with a circular positioning boss, the bottom of the closure cover is provided with a positioning groove that cooperates with the positioning boss, and the positioning boss is snapped into the positioning groove. .

Further, the edge of the closure cover is provided with four locking components, and the four locking components are respectively uniformly arranged around the closure cover in a circumferential direction for locking the closure cover to the pressure bearing. board.

Further, each of the locking assemblies includes a first locking ring, a second locking ring and a locking bolt, the first locking ring is fixedly connected to the pressure bearing plate, the first locking ring is Two locking rings are fixedly connected to the closing cover, and the locking bolts pass through and lock the first locking ring and the second locking ring to lock the closing cover on the pressure bearing plate.

The beneficial effect of the oil and gas leakage collection and constant pressure device of the present invention is that a constant pressure component is connected to the device and the closing cover, and the two constant pressure pumps of the constant pressure component can respectively increase and decrease the drilling fluid pressure in the production well, so as to balance the production The formation pressure of the well fluctuates, so that the pressure in the mining well remains unchanged, thereby preventing the risk of blowout in the process of oil and gas production and making the oil and gas production process safer; the closure cover is also connected with two oil and gas collection boxes, which can collect the oil and gas overflowing from the production well. and other greenhouse gases, preventing them from leaking from the wells and polluting the environment, making the oil and gas extraction process green and environmentally friendly.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of an oil and gas leakage collection and constant pressure device of the present invention.

FIG. 2 is a cross-sectional view of the pressure-bearing plate 1 and the closing cover 2 in FIG. 1 .

FIG. 3 is a top view of the pressure-bearing plate 1 and the closing cover 2 in FIG. 1 .

In the picture: 1-Pressure plate, 11-Limiting hole, 12-Fixing pile, 13-Locking assembly, 14-First locking ring, 15-Second locking ring, 16-Locking bolt, 17- Positioning boss, 2-closing cover, 21-accommodating hole, 22-connecting hole, 23-seal, 24-connecting pipe, 25-positioning groove, 3-drill pipe, 31-drive turntable, 41-drilling fluid input tank, 42-drilling fluid recovery tank, 51-first constant pressure pump, 52-second constant pressure pump, 6-LPG collection tank, 7-production well.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

Please refer to FIGS. 1 to 3 , an oil and gas leakage collection and constant pressure device, including a pressure bearing plate 1, a sealing device, a drilling fluid input box 41, a drilling fluid recovery box 42, a drill pipe 3, a constant pressure component, and a collection of petroleum gas. assembly and a plurality of connecting pipes 24, the pressure-bearing plate 1 is arranged above the wellhead of the production well 7, the edge of the pressure-bearing plate 1 is provided with four limit holes 11, and each limit hole 11 is provided with a Fixed piles 12, the four fixed piles 12 are all anchored to the ground around the production well 7, so as to anchor the bearing plate 1 above the wellhead of the production well 7, and the sealing device is a hemisphere-shaped sealing Cover 2, the closing cover 2 is covered on the pressure-bearing plate 1, and four locking assemblies 13 are arranged on the edges of the closing cover 2, and the four locking assemblies 13 are respectively arranged on the Around the closure cover 2 , the closure cover 2 is used to lock the closure cover 2 on the pressure bearing plate 1 .

The closing cover 2 is provided with a receiving hole 21 and a plurality of connecting holes 22. The connecting holes 22 are used to connect the connecting pipe 24. The receiving hole 21 is located on the top of the closing cover 2 and faces the production well. 7, the drill pipe 3 is located in the receiving hole 32, and the drill pipe 3 extends into the production well 7 through the receiving hole 21 and the pressure bearing plate 1, and the receiving hole 32 is also provided with a The sealing member 23, the sealing member 23 is a rubber ring, used to seal the gap between the receiving hole 32 and the drill rod 3, the top of the drill rod 3 is provided with a driving turntable 31, and the driving turntable 31 is used for Driven by the drilling rig, the drill rod 3 is driven to rotate so that the drill rod 3 is drilled downward.

The drilling fluid input box 41 and the drilling fluid recovery box 42 are respectively connected to a connecting hole 24 on the closure cover through a connecting pipe 24. An input pump is provided in the drilling fluid input box 41. The input pump It is used to input the drilling fluid in the drilling fluid input box 41 into the closure cover 2, and the drilling fluid recovery box 42 is provided with a pump, and the pump is used for the waste drilling fluid in the closure cover 1. It is pumped out to the drilling fluid recovery tank 42 for storage. The constant pressure component includes a first constant pressure pump 51 and a second constant pressure pump 52. Both ends of the first constant pressure pump 51 are respectively connected to the drilling fluid input through a connecting pipe 24. On the tank 41 and the closing cover 2, the two ends of the second constant pressure pump 52 are respectively connected to the drilling fluid recovery tank 42 and the closing cover 2 through the connecting pipe 24, and the first constant pressure pump 51 is used to input the drilling fluid The drilling hydraulic pressure in the tank 41 enters the closing cover 2 to supplement the pressure inside the closing cover 2. The second constant pressure pump 52 is used to pump the waste liquid in the closing cover 2 into the drilling fluid recovery tank 42 to reduce the sealing effect. pressure inside cover 2.

The LPG collection assembly includes two LPG collection boxes 6, the two LPG collection boxes 6 are respectively located on both sides of the closure cover 2, and the two LPG collection boxes 6 are respectively connected to the closure cover 2 through a connecting pipe 24. , the two LPG collection boxes 6 are used to collect LPG and other greenhouse gases overflowing from the exploitation well 7 .

Further, the drilling fluid input box 41 and the drilling fluid recovery box are connected through a circulation pipe 42, and the circulation pipe is provided with a filter and a circulation pump (not shown in the figure). In order to filter out the impurities in the waste liquid in the drilling fluid recovery box 42, the circulating pump is used for the drilling fluid waste liquid in the drilling fluid recovery box 42 to be filtered and input into the drilling fluid input box 41, thereby Recycle the drilling fluid.

Further, please refer to FIG. 2 , the pressure-bearing plate 1 is provided with a circular positioning boss 17 , and the bottom of the closure cover 2 is provided with a positioning groove 25 that cooperates with the positioning boss 17 . The positioning bosses 17 are snapped into the positioning grooves 25 , so that the closure cover 2 can be positioned and installed on the pressure-bearing plate 1 conveniently and quickly.

Further, please refer to FIG. 3 , each of the locking components 13 includes a first locking ring 14 , a second locking ring 15 and a locking bolt 16 , and the first locking ring 14 is fixedly connected to the On the bearing plate 1 , the second locking ring 15 is fixedly connected to the closing cover 2 , and the locking bolts 17 pass through the first locking ring 14 and the second locking ring 15 and connect them. Lock, so as to lock the closure cover 2 on the pressure bearing plate 1 .

The working process and principle of the oil and gas leakage collection and constant pressure device of the present invention are as follows: the drilling rig drives the driving turntable 31 to rotate, so that the drill pipe 3 is rotated downward in the production well 7; the drilling fluid input box 41 inputs the drilling fluid to the closed In the cover 2, the drilling fluid is poured into the mining well 7 from the gap between the drill pipe 3 and the mining well 7, and carries the impurities at the bottom of the mining well 7 to overflow from the gap between the drill pipe 3 and the mining well 7, and backflow. into the closure cover 22; the drilling fluid recovery box 42 extracts the drilling fluid waste liquid with impurities in the closure cover 2 to the drilling fluid recovery box 42, and the waste liquid in the drilling fluid recovery box 42 is input to the drilling through the circulation pipe and the filter device The fluid input tank 41 realizes the recycling of drilling fluid; when the pressure in the production well 7 is reduced due to the decrease of formation pressure, the first constant pressure pump 51 feeds the drilling fluid into the drilling fluid input box 41 into the closing cover 2 to supplement the production well 7 medium pressure, so that the pressure in the production well 7 remains unchanged; when the pressure in the production well 7 increases due to the increase of the bottom pressure, the second constant pressure pump 52 pumps out the drilling fluid in the closure cover 2 into the drilling fluid recovery tank 42, Reduce the pressure of the drilling fluid in the exploitation well 7, so that the pressure in the exploitation well 7 remains unchanged; when there is petroleum gas and other gas overflows in the exploitation well 7, the two petroleum gas collection boxes 6 are opened to collect the overflowed in the exploitation well 7. gas, to prevent the leakage of petroleum gas and other greenhouse gases from the production well 7 to pollute the environment.

The beneficial effect of the oil and gas leakage collection and constant pressure device of the present invention is that a constant pressure component is connected to the device and the closing cover 2, and the two constant pressure pumps of the constant pressure component can increase and decrease the drilling fluid pressure in the production well 7 respectively, Thereby, the pressure fluctuation of the exploitation well 7 is balanced, so that the pressure in the exploitation well 7 remains unchanged, thereby preventing the danger of blowout in the oil and gas exploitation process, and making the oil and gas exploitation process safer; the closure cover 2 is also connected with two oil and gas collection boxes 6, The LPG and other greenhouse gases overflowed from the exploitation well 7 can be collected to prevent them from leaking and polluting the environment, so that the oil and gas exploitation process is green and environmentally friendly.

In this document, the related terms such as front, rear, upper and lower are defined by the positions of the components in the drawings and the positions between the components, which are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of the locative words should not limit the scope of protection claimed in this application.

The above-described embodiments and features of the embodiments herein may be combined with each other without conflict.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (8)

1. a kind of oil and gas leakage collection and constant pressure device, it is characterized in that: comprise pressure-bearing plate, closure device, drilling fluid input box, drilling fluid recovery box, drill pipe and constant pressure assembly, and described pressure-bearing plate is fixed on the exploitation well Above the wellhead, the closing device is a closing cover in the shape of a hemisphere, the closing cover is covered on the pressure bearing plate, the closing cover is provided with an accommodating hole, the accommodating hole is located on the top of the closing cover, and Facing the wellhead of the production well, a drill pipe is arranged in the accommodating hole, the drill pipe extends into the production well through the accommodating hole and the pressure-bearing plate, and a driving turntable is arranged on the top of the drill pipe, and the driving turntable is used for The drilling rig is driven to drive the drill pipe to rotate and drill, the drilling fluid input box and the drilling fluid recovery box are respectively connected to the closure cover through connecting pipes, and an input pump is arranged in the drilling fluid input box. The input pump is used to input the drilling fluid in the drilling fluid input box into the closure cover, and the drilling fluid recovery box is provided with a pump, which is used to pump out the waste drilling fluid in the closure cover to the closed cover. The drilling fluid is stored in a recovery tank, and the constant pressure component includes a first constant pressure pump and a second constant pressure pump, and the first constant pressure pump is connected between the drilling fluid input tank and the closing cover, and is used to increase the pressure in the production well. When it is lowered, the drilling fluid in the drilling fluid input box is fed into the closure cover to supplement the pressure in the production well so that the pressure in the production well is constant. The second constant pressure pump is connected between the drilling fluid recovery tank and the closure cover for When the pressure in the production well increases, the waste drilling fluid in the sealing cover is pumped out into the drilling fluid recovery box to reduce the pressure in the production well and keep the pressure in the production well constant. 2. a kind of oil and gas leakage collection according to claim 1 and constant pressure device, it is characterized in that: described constant pressure device also comprises petroleum gas collection assembly, described petroleum gas collection assembly is petroleum gas collection box, described petroleum gas A gas collection box is connected to the closure cover through a connecting pipe, and the LPG collection box is used for collecting LPG and other greenhouse gases overflowing from the wellhead of the imported production well. 3. a kind of oil and gas leakage collection and constant pressure device according to claim 2, is characterized in that: described petroleum gas collection box quantity is two, and two described petroleum gas collection boxes are respectively arranged on both sides of described closure cover . 4. a kind of oil and gas leakage collection and constant pressure device according to claim 1, is characterized in that: described drilling fluid input box and described drilling fluid recovery box are connected by a circulation pipe, and described circulation pipe is provided with a filter filter and a circulating pump, the filter is used to filter out the impurities in the waste liquid in the drilling fluid recovery box, and the circulating pump is used for the waste liquid in the drilling fluid recovery box to be filtered and input to the drilling fluid Input into the tank, so that the drilling fluid can be recycled. 5. a kind of oil and gas leakage collection and constant pressure device according to claim 1, is characterized in that: described pressure-bearing plate edge is provided with four, and each limit hole is provided with a fixed pile in the limit hole, All fixed piles are anchored to the ground to anchor the bearing plate above the wellhead. 6. a kind of oil and gas leakage collection and constant pressure device according to claim 1, is characterized in that: described pressure-bearing plate is provided with annular positioning boss, and described closing cover bottom is provided with a The positioning boss is matched with the positioning groove, and the positioning boss is clamped into the positioning groove. 7. A kind of oil and gas leakage collection and constant pressure device according to claim 1, it is characterized in that: described closing cover edge is provided with four locking assemblies, and four described locking assemblies are respectively uniform circumferentially arranged on The periphery of the closure cover is used for locking the closure cover on the pressure bearing plate. 8. a kind of oil and gas leakage collection and constant pressure device according to claim 7, is characterized in that: each described locking assembly comprises a first locking ring, a second locking ring and a locking bolt, The first locking ring is fixedly connected to the pressure bearing plate, the second locking ring is fixedly connected to the closing cover, and the locking bolt passes through and locks the first locking ring and the second locking ring. The two locking rings lock the closure cover on the pressure bearing plate.

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