阅读说明：本技术 一种油气泄露收集及恒压装置 (Oil gas leakage collecting and constant-pressure device ) 是由 邓空 刘占红 武慧慧 王杰 郭伟 汤冠雄 高梦天 吴少波 徐飘飘 江春雷 古娟 于 2020-05-06 设计创作，主要内容包括：本发明提供一种油气泄露收集及恒压装置,包括承压板和封闭盖,所述承压板盖于开采井井口,所述封闭盖盖于所述承压板上,所述封闭盖上连接有钻井液输入箱、钻井液回收箱、石油气收集箱和恒压组件,所述封闭盖顶部设有一容纳孔,所述容纳孔内设有一钻杆,所述恒压组件用于平衡开采井内钻井液压力波动,所述石油气收集箱用于收集开采井中溢出的气体。本发明的有益效果为：封闭盖上连接的恒压组件可平衡开采井内的钻井液压力波动,使开采井内压力保持不变,从而避免油气开采过程中井喷的危险；封闭盖上连接的石油气收集箱,可收集开采井溢出的石油气和其他温室气体,防止其从开采井中外泄而污染环境,从而使油气开采过程绿色环保。(The invention provides an oil gas leakage collecting and constant pressure device which comprises a bearing plate and a sealing cover, wherein the bearing plate covers the wellhead of a production well, the sealing cover covers the bearing plate, a drilling fluid input box, a drilling fluid recovery box, an oil gas collecting box and a constant pressure component are connected onto the sealing cover, a containing hole is formed in the top of the sealing cover, a drill rod is arranged in the containing hole, the constant pressure component is used for balancing pressure fluctuation drilling fluid in the production well, and the oil gas collecting box is used for collecting gas overflowing from the production well. The invention has the beneficial effects that: the constant pressure component connected to the closing cap can balance the pressure fluctuation of the drilling fluid in the production well, so that the pressure in the production well is kept unchanged, and the danger of blowout in the oil and gas production process is avoided; the petroleum gas collecting box connected with the closing cover can collect petroleum gas and other greenhouse gases overflowing from the exploitation well, and prevent the petroleum gas and other greenhouse gases from leaking from the exploitation well to pollute the environment, so that the oil and gas exploitation process is green and environment-friendly.)

1. The oil gas leakage collecting and constant pressure device is characterized by comprising a bearing plate, a sealing device, a drilling fluid input box, a drilling fluid recovery box, a drill rod and a constant pressure component, wherein the bearing plate is fixed above a wellhead of an exploitation well, the sealing device is a sealing cover in the shape of a hemisphere, the sealing cover covers the bearing plate, a containing hole is formed in the sealing cover, the containing hole is positioned at the top of the sealing cover and is just opposite to the wellhead of the exploitation well, a drill rod is arranged in the containing hole, the drill rod penetrates through the containing hole and the bearing plate to extend into the exploitation well, a driving turntable is arranged at the top of the drill rod and is used for driving the drill rod to drill in a rotating manner under the driving of a drilling machine, the drilling fluid input box and the drilling fluid recovery box are respectively connected onto the sealing cover through connecting pipes, and an input pump is arranged in, the constant pressure assembly comprises a first constant pressure pump and a second constant pressure pump, the first constant pressure pump is connected between the drilling fluid input box and the sealing cover and used for pressing the drilling fluid in the drilling fluid input box into the sealing cover when the pressure in the mining well is reduced so as to supplement the pressure in the mining well and keep the pressure in the mining well constant, and the second constant pressure pump is connected between the drilling fluid recovery box and the sealing cover and used for pumping the drilling fluid waste liquid in the sealing cover into the drilling fluid recovery box when the pressure in the mining well is increased so as to reduce the pressure in the mining well and keep the pressure in the mining well constant.

2. The oil and gas leakage collecting and constant pressure device as claimed in claim 1, further comprising an oil gas collecting assembly, wherein the oil gas collecting assembly is an oil gas collecting box connected to the closing cap through a connecting pipe, and the oil gas collecting box is used for collecting oil gas and other greenhouse gases overflowing from a wellhead of the inlet production well.

3. The oil-gas leakage collecting and pressure stabilizing device as claimed in claim 2, wherein the number of the petroleum gas collecting boxes is two, and the two petroleum gas collecting boxes are respectively arranged on two sides of the sealing cover.

4. The oil gas leakage collecting and constant pressure device as claimed in claim 1, wherein the drilling fluid input tank and the drilling fluid recovery tank are connected through a circulation pipe, a filter and a circulation pump are arranged on the circulation pipe, the filter is used for filtering impurities in the waste fluid in the drilling fluid recovery tank, and the circulation pump is used for inputting the filtered waste fluid in the drilling fluid recovery tank into the drilling fluid input tank, so that the drilling fluid is recycled.

5. The oil and gas leakage collecting and constant pressure device as claimed in claim 1, wherein the pressure-bearing plate is provided with four edges, each limiting hole is provided with a fixing pile, and all fixing piles are anchored on the ground so as to anchor the pressure-bearing plate above a wellhead.

6. The oil-gas leakage collecting and constant pressure device as claimed in claim 1, wherein the pressure bearing plate is provided with a circular positioning boss, the bottom of the sealing cover is provided with a positioning groove matched with the positioning boss, and the positioning boss is clamped into the positioning groove.

7. The oil and gas leakage collecting and constant pressure device as claimed in claim 1, wherein the edge of the closing cap is provided with four locking assemblies, and the four locking assemblies are uniformly and circumferentially arranged around the closing cap respectively and used for locking the closing cap on the bearing plate.

8. The oil and gas leakage collecting and pressure stabilizing device according to claim 7, wherein each of said locking assemblies comprises a first locking ring fixedly attached to said pressure bearing plate, a second locking ring fixedly attached to said closing cap, and a locking bolt passing through and locking said first locking ring and said second locking ring to lock said closing cap to said pressure bearing plate.

Technical Field

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

Background

Oil and gas production of petroleum usually requires a drilling machine to drive a drill rod to drill a production well; in the drilling process of the exploitation well, the pressure of drilling fluid in the exploitation well can fluctuate due to the pressure change of the stratum, when the pressure fluctuation of the drilling fluid in the exploitation well is overlarge, the blowout phenomenon easily occurs in the exploitation well, so that the safety problem is caused, meanwhile, a large amount of gas is often overflowed from the exploitation well along with the drilling process of the exploitation well, and the gas is mainly petroleum gas and other greenhouse gases associated with petroleum liquid. The existing oil and gas exploitation device is difficult to solve the problems of petroleum gas leakage and overlarge pressure fluctuation of drilling fluid, so that the existing oil and gas exploitation device has the phenomena of petroleum gas leakage and air pollution in the process of oil exploitation, and is easy to cause blowout to cause safety problems; in order to reduce the problem of air pollution caused by oil exploitation and increase the safety of oil exploitation, an oil exploitation device capable of collecting petroleum gas in an oil exploitation well and balancing pressure fluctuation of drilling fluid in the oil exploitation well needs to be developed.

Disclosure of Invention

In order to solve the problems, the invention provides an oil gas leakage collecting and constant pressure device which comprises a pressure bearing plate, a sealing device, a drilling fluid input box, a drilling fluid recovery box, a drill rod and a constant pressure component, wherein the pressure bearing plate is fixed above a well mouth of a production well, the sealing device is a sealing cover in a hemisphere shape, the sealing cover covers the pressure bearing plate, a containing hole is formed in the sealing cover, the containing hole is positioned at the top of the sealing cover and is opposite to the well mouth of the production well, the drill rod is arranged in the containing hole, the drill rod penetrates through the containing hole and the pressure bearing plate and extends into the production well, a driving turntable is arranged at the top of the drill rod and is used for driving the drill rod to drill in a rotating manner under the driving of a drilling machine, the drilling fluid input box and the drilling fluid recovery box are respectively connected to the sealing cover through connecting pipes, the constant pressure assembly comprises a first constant pressure pump and a second constant pressure pump, the first constant pressure pump is connected between the drilling fluid input box and the sealing cover and used for pressing the drilling fluid in the drilling fluid input box into the sealing cover when the pressure in the mining well is reduced so as to supplement the pressure in the mining well and keep the pressure in the mining well constant, and the second constant pressure pump is connected between the drilling fluid recovery box and the sealing cover and used for pumping the drilling fluid waste liquid in the sealing cover into the drilling fluid recovery box when the pressure in the mining well is increased so as to reduce the pressure in the mining well and keep the pressure in the mining well constant.

Furthermore, the constant pressure device also comprises an oil gas collecting assembly, wherein the oil gas collecting assembly comprises an oil gas collecting box, the oil gas collecting box is connected to the closed cover through a connecting pipe, and the oil gas collecting box is used for collecting the oil gas and other greenhouse gases overflowing from the wellhead of the exploitation well.

Furthermore, the number of the petroleum gas collecting boxes is two, and the two petroleum gas collecting boxes are respectively arranged on two sides of the sealing cover.

Furthermore, the drilling fluid input box with the drilling fluid collection box is connected through a circulating pipe, be equipped with a filter and a circulating pump on the circulating pipe, the filter is used for filtering off the impurity in the waste liquid in the drilling fluid collection box, the circulating pump is used for the waste liquid in the drilling fluid collection box is inputed to the drilling fluid input incasement after filtering to make drilling fluid cyclic utilization.

Furthermore, the edge of the pressure-bearing plate is provided with four pressure-bearing plates, each limiting hole is internally provided with a fixing pile, and all the fixing piles are anchored on the ground so as to anchor the pressure-bearing plate above a wellhead.

Furthermore, the pressure bearing plate is provided with a circular positioning boss, the bottom of the sealing cover is provided with a positioning groove matched with the positioning boss, and the positioning boss is clamped into the positioning groove.

Furthermore, the edge of the sealing cover is provided with four locking assemblies, and the four locking assemblies are respectively and uniformly circumferentially arranged around the sealing cover and used for locking the sealing cover on the pressure bearing plate.

Further, each of the locking assemblies includes a first locking ring fixedly coupled to the bearing plate, a second locking ring fixedly coupled to the cap, and a locking bolt passing through and locking the first locking ring and the second locking ring to lock the cap to the bearing plate.

The oil gas leakage collecting and constant pressure device has the beneficial effects that: the device and the closing cover are connected with a constant pressure assembly, and two constant pressure pumps of the constant pressure assembly can respectively increase and decrease the drilling fluid pressure in the production well, so that the formation pressure fluctuation of the production well is balanced, the pressure in the production well is kept unchanged, the well blowout danger in the oil and gas production process is prevented, and the oil and gas production process is safer; the closing cap still is connected with two oil gas collecting boxes, can collect the oil gas and other greenhouse gases that the exploitation well spilled over, prevents that it from leaking and polluting the environment in the exploitation well, makes oil gas exploitation process green.

Drawings

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

Fig. 2 is a sectional view of the pressure bearing plate 1 and the closure cap 2 of fig. 1.

Fig. 3 is a plan view of the pressure bearing plate 1 and the closure cap 2 of fig. 1.

In the figure: 1-bearing plate, 11-limiting hole, 12-fixing pile, 13-locking component, 14-first locking ring, 15-second locking ring, 16-locking bolt, 17-positioning boss, 2-closing cover, 21-containing hole, 22-connecting hole, 23-sealing piece, 24-connecting pipe, 25-positioning groove, 3-drill rod, 31-driving rotary table, 41-drilling fluid input box, 42-drilling fluid recovery box, 51-first constant pressure pump, 52-second constant pressure pump, 6-petroleum gas collection box and 7-exploitation well.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 3, an oil gas leakage collecting and constant pressure device includes a pressure bearing plate 1, a sealing device, a drilling fluid input box 41, a drilling fluid recovery box 42, a drill rod 3, a constant pressure component, an oil gas collecting component, and a plurality of connecting pipes 24, the bearing plate 1 is arranged above a wellhead of the mining well 7, four limiting holes 11 are arranged at the edge of the bearing plate 1, a fixing pile 12 is arranged in each limiting hole 11, the four fixing piles 12 are all anchored on the ground around the mining well 7, so as to anchor the pressure bearing plate 1 above the wellhead of the production well 7, the closing means being a closing cap 2 in the shape of a hemisphere, the sealing cover 2 covers the pressure bearing plate 1, four locking assemblies 13 are arranged at the edge of the sealing cover 2, and the four locking assemblies 13 are respectively and circumferentially and uniformly arranged around the sealing cover 2 and used for locking the sealing cover 2 on the pressure bearing plate 1.

Be equipped with a holding hole 21 and a plurality of connecting hole 22 on the closing cap 2, connecting hole 22 is used for connecting pipe 24, holding hole 21 is located 2 tops of closing cap to just the well head to the exploitation well 7, drilling rod 3 is located in the holding hole 32, just drilling rod 3 passes holding hole 21 and pressure-bearing plate 1 and extends to in the exploitation well 7, holding hole 32 still is equipped with a sealing member 23, sealing member 23 is a rubber ring for sealed holding hole 32 with the clearance of drilling rod 3, drilling rod 3 top is equipped with drive carousel 31, drive carousel 31 is used for the drive under the drive of rig drilling rod 3 is rotatory thereby makes drilling rod 3 drill downwards.

The drilling fluid input box 41 and the drilling fluid recovery box 42 are respectively connected with a connecting hole 24 on the sealing cover through a connecting pipe 24, an input pump is arranged in the drilling fluid input box 41 and used for inputting the drilling fluid in the drilling fluid input box 41 into the sealing cover 2, a liquid pump is arranged in the drilling fluid recovery box 42 and used for pumping the waste drilling fluid in the sealing cover 1 out to the drilling fluid recovery box 42 for storage, the constant pressure component comprises a first constant pressure pump 51 and a second constant pressure pump 52, two ends of the first constant pressure pump 51 are respectively connected with the drilling fluid input box 41 and the sealing cover 2 through the connecting pipe 24, two ends of the second constant pressure pump 52 are respectively connected with the drilling fluid recovery box 42 and the sealing cover 2 through the connecting pipe 24, and the first constant pressure pump 51 is used for pressing the drilling fluid in the drilling fluid input box 41 into the sealing cover 2, to supplement the pressure in the closing cap 2, and the second constant pressure pump 52 is used for pumping the waste liquid in the closing cap 2 to the drilling fluid recovery tank 42 so as to reduce the pressure in the closing cap 2.

The petroleum gas collecting component comprises two petroleum gas collecting boxes 6, the two petroleum gas collecting boxes 6 are respectively positioned at two sides of the sealing cover 2, the two petroleum gas collecting boxes 6 are respectively connected to the sealing cover 2 through connecting pipes 24, and the two petroleum gas collecting boxes 6 are used for collecting petroleum gas 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, a filter and a circulation pump (not shown in the figure) are arranged on the circulation pipe, the filter is used for filtering out impurities in waste fluid in the drilling fluid recovery box 42, and the circulation pump is used for inputting the filtered drilling fluid waste fluid in the drilling fluid recovery box 42 into the drilling fluid input box 41, so that the drilling fluid is recycled.

Further, please refer to fig. 2, the pressure bearing plate 1 is provided with a circular positioning boss 17, the bottom of the sealing cover 2 is provided with a positioning groove 25 matched with the positioning boss 17, and the positioning boss 17 is clamped into the positioning groove 25 for positioning and installing the sealing cover 2 on the pressure bearing plate 1 conveniently and quickly.

Further, referring to fig. 3, each of the locking assemblies 13 includes a first locking ring 14, a second locking ring 15 and a locking bolt 16, the first locking ring 14 is fixedly connected to the pressure bearing plate 1, the second locking ring 15 is fixedly connected to the closing cap 2, and the locking bolt 17 penetrates through the first locking ring 14 and the second locking ring 15 and locks them, thereby locking the closing cap 2 to the pressure bearing plate 1.

The working process and principle of the oil gas leakage collecting and constant pressure device are as follows: the drilling machine drives the driving turntable 31 to rotate, so that the drill rod 3 rotates downwards in the production well 7; the drilling fluid input box 41 inputs the drilling fluid into the sealing cover 2, the drilling fluid is filled into the exploitation well 7 from a gap between the drill rod 3 and the exploitation well 7, carries impurities at the bottom of the exploitation well 7 to overflow from the gap between the drill rod 3 and the exploitation well 7, and flows back into the sealing cover 22; the drilling fluid recycling tank 42 pumps the drilling fluid waste liquid with impurities in the sealing cover 2 to the drilling fluid recycling tank 42, and the waste liquid in the drilling fluid recycling tank 42 is input to the drilling fluid input tank 41 through a circulating pipe and a filtering device, so that the cyclic utilization of the drilling fluid is realized; when the pressure in the production well 7 is reduced due to the reduction of the formation pressure, the first constant pressure pump 51 presses the drilling fluid in the drilling fluid input box 41 into the sealing cover 2 to supplement the pressure in the production well 7, so that the pressure of the production well 7 is kept unchanged; when the pressure in the exploitation well 7 is increased due to the increase of the bottom layer pressure, the second constant pressure pump 52 pumps the drilling fluid in the closing cover 2 into the drilling fluid recovery tank 42, so that the pressure of the drilling fluid in the exploitation well 7 is reduced, and the pressure of the exploitation well 7 is kept unchanged; when petroleum gas and other gases overflow from the exploitation well 7, the two petroleum gas collecting boxes 6 are opened to collect the gases overflowing from the exploitation well 7, so as to prevent the petroleum gas and other greenhouse gases overflowing from the exploitation well 7 from leaking to pollute the environment.

The oil gas leakage collecting and constant pressure device has the beneficial effects that: the device and the closing cover 2 are connected with a constant pressure component, and two constant pressure pumps of the constant pressure component can respectively increase and decrease the drilling fluid pressure in the exploitation well 7, so that the pressure fluctuation of the exploitation well 7 is balanced, the pressure in the exploitation well 7 is kept unchanged, the well blowout danger in the oil and gas exploitation process is prevented, and the oil and gas exploitation process is safer; the closing cap 2 is also connected with two oil gas collecting boxes 6 which can collect the oil gas and other greenhouse gases overflowing from the exploitation well 7, prevent the oil gas and other greenhouse gases from leaking and polluting the environment, and ensure that the oil gas exploitation process is green and environment-friendly.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

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

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.