CN110439479B

CN110439479B - Oil gas well drilling well head suction auxiliary discharge manifold system

Info

Publication number: CN110439479B
Application number: CN201910816978.8A
Authority: CN
Inventors: 范黎明; 陆灯云; 邓虎; 唐贵; 廖兵; 孙莉; 刘殿琛; 董仕明; 李雷; 黄崇君; 李金河; 罗群
Original assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-11-03
Anticipated expiration: 2039-08-30
Also published as: CN110439479A

Abstract

The invention provides a pumping, assistant and discharge piping collection system for a wellhead of an oil and gas drilling well, which comprises a plurality of hard pipeline bodies, an adjustable annular pumping, assistant and discharge mechanism for a drilling sand discharge pipeline, and a telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline, wherein the adjustable annular pumping, assistant and discharge mechanism can realize negative pressure pumping action on the drilling wellhead and/or the pipeline turning position, and can realize telescopic connection. The invention can solve the safety problem of gas drilling open-hole operation under the condition of a small amount of natural gas in the stratum, obviously improve the safety of gas drilling open-hole operation in a gas-containing layer section, and can also be applied to conventional normal cycle or reverse cycle gas drilling, thereby effectively reducing the local loss at a right-angle turning part and ensuring that the sand discharge process on the ground surface is smoother; can also easily, conveniently, adjust sand discharge pipeline length at will, dock the sand discharge pipeline fast, avoid lifting the sled repeatedly, reduce staff's work load and working strength, shorten the installation operation cycle, save operation personnel cost and crane use expense.

Description

Oil gas well drilling well head suction auxiliary discharge manifold system

Technical Field

The invention relates to the technical field of oil and gas drilling (drilling) engineering, in particular to a sand discharge manifold equipment system for drilling, which can be used for performing nitrogen suction safety operation under the condition of a small amount of natural gas from a stratum, and can also be used for reducing the sand discharge resistance of a surface sand discharge manifold during forward circulation or reverse circulation drilling and improving the sand discharge effect.

Background

Generally, the gas drilling technology has the advantages of accelerating, controlling leakage, protecting a reservoir and the like, is widely applied to oil and gas blocks such as Chongqing, Xinjiang, Qinghai and the like in recent years, and can accelerate the speed by more than 3 times compared with the conventional drilling technology. Gas drilling speed increasing is more common in gas-containing intervals with poor drilling difficulty; however, once a small amount of natural gas (10000 m or less) is drilled out of the formation³And d), the circulating medium is converted into inert gas nitrogen to avoid underground explosion accidents, but because of the lack of an annular blowout preventer, the large size of a drilling tool and the incapability of passing through a rotary control head assembly and other reasons, natural gas possibly overflows a well head during open-hole operations such as tripping and rubber core replacement, and great potential safety hazards are brought.

At the present stage, effective measures for solving the problem that natural gas overflows a wellhead when open-hole operations such as tripping and replacing a rubber core are carried out under the condition that a small amount of natural gas is produced from the stratum are not provided, and natural gas which possibly overflows is blown away mainly by opening an upper and a lower explosion-proof exhaust fans of a drill floor to prevent the natural gas from being gathered. This treatment method has a number of disadvantages:

firstly, the natural gas is a passive control measure, the natural gas cannot be prevented from overflowing from a well head fundamentally, and the natural gas which possibly overflows can be blown away only by an exhaust fan;

although the anti-explosion exhaust fan can blow away the overflowing natural gas to avoid gathering, operators on a drill floor and a wellhead still need to directly face the natural gas which possibly overflows, so that great potential safety hazards exist, and knocking operation is particularly carried out;

thirdly, because the safety of field operation cannot be ensured, when a small amount of natural gas (less than or equal to 10000 m) is produced in the stratum during drilling³And/d), the gas drilling operation is often forced to be terminated early, which is not favorable for the speed-up advantage.

In addition, generally speaking, the sand discharge pipeline in the well site of the gas drilling adopts flange connection, and is preferably connected out of the well site in a straight way. Due to the fact that the diameter and the weight of the sand discharge pipelines are large, in most of the time, the butt joint of the sand discharge pipelines on site is difficult, and the sand discharge pipelines are difficult to butt in place at one time. Normally, there will be a gap between both sand discharge lines. In order to ensure that the connection is tight and jointed, the flanges (or the hoops) at the end parts of the pipelines are contacted together and then fastened by adopting modes of manual lifting, lever prying and the like. The sand discharge pipeline is very heavy, so that the pipeline is very inconvenient to install. The method not only greatly increases the installation operation time, increases the workload and the working strength of workers, but also improves the cost of the operators and the use cost of the crane, even can cause the drill to stop and the like, and prolongs the serious consequences of the drilling period.

Disclosure of Invention

The present invention aims to address at least one of the above-mentioned deficiencies of the prior art.

For example, one of the objects of the present invention is to solve the safety problems in gas drilling open-hole operations under conditions where a small amount of natural gas is formed and the difficulty in docking a sand discharge line in a well site for gas drilling. The invention also aims to solve the problems that when the conventional forward circulation or reverse circulation gas drilling is carried out (particularly reverse circulation drilling), the sand discharge effect is influenced due to large local loss caused by a plurality of right-angle turning positions of the sand discharge channel on the surface, and the butt joint of the sand discharge pipeline in a well site of the gas drilling is difficult.

In order to achieve at least one of the above objects, the present invention provides an oil and gas drilling wellhead pumping and exhausting assisted manifold system, which includes a plurality of hard pipeline pipes including a first hard pipeline pipe and a second hard pipeline pipe arranged along a fluid flowing direction, and is characterized in that the oil and gas drilling wellhead pumping and exhausting assisted manifold system further includes an adjustable drilling sand discharge pipeline annular pumping and exhausting mechanism and a telescopic pipeline length adjusting mechanism for a drilling sand discharge pipeline, wherein the adjustable drilling sand discharge pipeline annular pumping and exhausting mechanism includes: the gas injection device comprises a basic flange, a gas injection shell, a central core male pipe and an upper core pipe which are coaxially arranged along a first axial direction, wherein the basic flange is provided with a left side part, a right side part provided with an outer conical surface and an outer protruding part protruding outwards along the radial direction; the gas injection shell comprises a left side part with a first inner diameter, a right side part with a second inner diameter and one or more than two gas injection joints, wherein the first inner diameter is larger than the second inner diameter, the left side part of the gas injection shell is fixedly connected with the outer protruding part of the base flange through an anti-rotation component, the inner circumference of the right side part of the gas injection shell is provided with a first thread, and the gas injection joints can communicate the space corresponding to the first inner diameter with external gas; the central male pipe comprises a right side part inserted into the left side of the upper core pipe and closely contacted with the inner circumferential wall of the upper core pipe through a first sealing member, a left side part with a second thread, and an inner conical surface formed on the inner circumference of the left side part of the central male pipe, wherein the second thread is arranged on the outer wall of the central male pipe and can be matched with the first thread to realize the left or right movement of the central male pipe relative to the gas injection shell corresponding to the axial rotation of the central male pipe, and the inner conical surface can be matched with the outer conical surface of the right side part of the base flange to form an adjustable injection channel communicated with the gas injection connector, so that the closing or opening of the injection channel is realized corresponding to the left or right movement of the central male pipe; the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline comprises a lower base flange, a lower base pipe, an upper base pipe, a primary extension pipe, a limiting ring and a secondary extension pipe which are coaxially arranged along a second axial direction, wherein the lower base flange is provided with a left side part and a right side part which is provided with an outer protrusion part protruding outwards in the radial direction; the lower base pipe is provided with a left side part fixedly connected with the outer protruding part of the right side part of the lower base flange through an anti-rotation component, and a right side part provided with a third thread on the inner circumferential surface; the upper base pipe comprises a left side part with a third inner diameter and a right side part with a fourth inner diameter, wherein the third inner diameter is larger than the fourth inner diameter, and fourth threads which can be matched with the third threads on the right side part of the lower base pipe are arranged on the outer circumferential wall of the left side part of the upper base pipe; the first-stage extension pipe comprises a left side part with a first outer diameter, a right side part with a second outer diameter and a limiting protrusion part arranged on the inner circumferential surface of the right side part of the first-stage extension pipe, wherein the first outer diameter is larger than the third inner diameter, the second outer diameter is smaller than the third inner diameter, the left side part of the first-stage extension pipe is positioned between the left end surface of the left side part of the upper base pipe and the right end surface of the outer protrusion part of the lower base flange, the right side part of the first-stage extension pipe is positioned between the left end surface of the right side part of the upper base pipe and the right end surface of the outer protrusion part of the lower base flange, and the first-stage extension pipe can move leftwards or rightwards in a space formed by the outer protrusion part of the lower base flange, the lower base pipe and the upper base pipe; the limiting ring is fixedly connected to the inner circumferential wall of the left side part of the primary extension pipe; the second-stage extension pipe comprises a left side part with a third outer diameter, a middle convex part with a fourth outer diameter and a right side part with a fifth outer diameter which are sequentially connected, wherein the third outer diameter is smaller than the fourth outer diameter, the fifth outer diameter is smaller than the fourth outer diameter and is equal to the fourth inner diameter, the left side part of the second-stage extension pipe penetrates through the limiting ring and then is inserted into the right side part of the lower base flange, and the middle convex part is positioned between the limiting protruding part and the limiting ring of the first-stage extension pipe so that the second-stage extension pipe can move leftwards or rightwards between the limiting protruding part and the limiting ring of the first-stage extension pipe; the adjustable annular pumping drainage-assisting mechanism for the drilling sand discharge pipeline can select one or two connection modes of the following modes: the left side part of a basic flange of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism is connected with a well head, and the right side part of an upper core pipe of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism is connected with an inlet end of a first hard pipeline body; and secondly, the left side part of a basic flange of the adjustable drilling sand discharge pipeline annular suction drainage-assisting mechanism is connected with the outlet end of the first hard pipeline body, and the right side part of an upper core pipe of the adjustable drilling sand discharge pipeline annular suction drainage-assisting mechanism is connected with the inlet end of the second hard pipeline body. The telescopic pipeline length adjusting mechanism can select any one or more than two connection modes of the following modes: first, the left side portion of the lower base flange of the telescopic line length adjustment mechanism is connected to the outlet end of the preceding one of two adjacent hard line pipe bodies of the plurality of hard line pipe bodies, and the right side portion of the secondary extension pipe of the telescopic line length adjustment mechanism is connected to the inlet end of the following one of the two adjacent hard line pipe bodies; the left side part of a lower base flange of the telescopic pipeline length adjusting mechanism is connected with the right side part of an upper core pipe of the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism, and the right side part of a second-stage extension pipe of the telescopic pipeline length adjusting mechanism is connected with the inlet end of a hard pipeline pipe body correspondingly positioned behind the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism; and thirdly, the right side part of the second-stage extension pipe of the telescopic pipeline length adjusting mechanism is connected with the left side part of the basic flange of the adjustable well drilling sand discharge pipeline annular suction auxiliary discharge mechanism, and the left side part of the lower basic flange of the telescopic pipeline length adjusting mechanism is connected with the outlet end of the hard pipeline body correspondingly positioned in front of the adjustable well drilling sand discharge pipeline annular suction auxiliary discharge mechanism. The second axial direction may be independent of the first axial direction. For example, the second axis may be parallel to or coincident with or intersecting or out of plane with the first axis.

In an exemplary embodiment of the invention, the number of the adjustable annular pumping and drainage-assisting mechanisms of the drilling and sand discharging pipeline can be one or more than two. Furthermore, the adjustable annular pumping and drainage mechanism of the drilling and sand discharging pipeline can be arranged at the position of an wellhead and/or at the position of the downstream of a pipeline turning.

In an exemplary embodiment of the present invention, the suction drainage aid mechanism may further include an upper core pipe flange capable of connecting a right side portion of the upper core pipe with the inlet end of the first hard line pipe body or with the inlet end of the second hard line pipe body.

In an exemplary embodiment of the present invention, the suction evacuation assist mechanism may further include an upper core tube chucking member capable of chucking a right side portion of the central core male tube with the upper core tube and restricting an axial displacement between the upper core tube and the central core male tube.

In an exemplary embodiment of the invention, the core pin further includes an outer convex circumferential portion provided on the left side portion of the core pin and protruding radially outward to the left of the second thread to improve sealability of the first thread to the second thread.

In an exemplary embodiment of the invention, the core male pipe further comprises a rotation fitting portion capable of enabling the core male pipe to rotate around the shaft under an external force.

In an exemplary embodiment of the present invention, the suction and discharge assisting mechanism may further include a gas compression device, and a gas outlet of the gas compression device is connected to the gas injection joint of the gas injection housing.

In an exemplary embodiment of the present invention, the right side portion of the base flange may be fixedly coupled to the gas injection housing by a detachable anti-rotation member.

In an exemplary embodiment of the invention, the number of the telescopic line length adjustment mechanisms for the drilling and sand discharging line may be one or more. In addition, the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline can be arranged between the adjacent adjustable annular pumping drainage-assisting mechanism for the drilling sand discharge pipeline and the hard pipeline body and/or can be arranged between the adjacent two hard pipeline bodies.

In an exemplary embodiment of the present invention, the telescopic pipeline length adjustment mechanism may further include a secondary extension pipe flange capable of connecting the right side portion of the secondary extension pipe with the inlet end of the second hard pipeline pipe body or with the inlet end of the latter hard pipeline pipe body.

The telescopic pipeline length adjusting mechanism may further include a first sealing member disposed between the outer circumferential wall of the left side portion of the primary extension pipe and the inner circumferential wall of the lower base pipe, a second sealing member disposed between the outer circumferential wall of the left side portion of the secondary extension pipe and the inner circumferential wall of the lower base flange, and a third sealing member disposed between the outer circumferential wall of the middle protrusion portion of the secondary extension pipe and the inner circumferential wall of the right side portion of the primary extension pipe.

In an exemplary embodiment of the present invention, the telescopic line length adjustment mechanism may further include a liquid pouring port capable of connecting a space surrounded by the first, second, and third seal members with the first hydraulic press.

In an exemplary embodiment of the invention, one or more of the first, second and third seal members may include cooperating seal rings and seal grooves. Further, the telescopic line length adjusting mechanism may further include a fourth sealing member provided between the left side portion of the upper base pipe and the right side portion of the lower base pipe, and a fifth sealing member provided between the right side portion of the upper base pipe and the right side portion of the secondary extension pipe. In addition, the telescopic pipeline length adjusting mechanism can further comprise a liquid return port, and the liquid return port can be used for connecting the space enclosed by the first sealing component, the third sealing component, the fourth sealing component and the fifth sealing component with the second hydraulic device. The fourth and/or fifth seal members may include cooperating seal rings and seal grooves.

In an exemplary embodiment of the invention, the stopper ring is fixedly attached to the inner circumferential wall of the left side portion of the primary extension pipe by means of a screw.

Drawings

FIG. 1 illustrates a schematic diagram of an exemplary embodiment of a wellhead pumping and discharge-assist manifold system of the present invention;

FIG. 2a is a schematic cross-sectional view of an adjustable annular pumping and discharging mechanism of a drilling and discharging line in an exemplary embodiment of a pumping and discharging manifold system of a wellhead of an oil and gas drilling well according to the present invention;

FIG. 2b shows an enlarged partial schematic view of I in FIG. 2 a;

FIG. 3 illustrates an appearance effect diagram of an adjustable annular pumping and discharging mechanism of a drilling and discharging sand line in an exemplary embodiment of the pumping and discharging manifold system of the oil and gas drilling wellhead of the invention;

FIG. 4 is a schematic cross-sectional view of an exemplary embodiment of an adjustable wellbore sand discharge line annular pumping discharge aiding mechanism of the present invention in a closed position;

FIG. 5 shows a partial enlarged schematic view of N in FIG. 4;

FIG. 6 is a diagram illustrating the effect of the adjustable annular pumping aid mechanism of the drilling and sand discharge line in an exemplary embodiment of the wellhead pumping aid manifold system for oil and gas drilling of the present invention;

FIG. 7a is a schematic diagram illustrating a telescoping line length adjustment mechanism for a drilling sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon drilling wellhead of the present invention;

FIG. 7b shows a cross-sectional view corresponding to section H-H in FIG. 7 a;

FIG. 8 illustrates a schematic external view of a telescoping line length adjustment mechanism for a drilling sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon drilling wellhead of the present invention;

FIG. 9 is a schematic diagram illustrating a one-stage extension of a telescoping line length adjustment mechanism for a drilling sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon drilling wellhead of the present invention;

FIG. 10 is a schematic diagram illustrating a two-stage extension of a telescoping line length adjustment mechanism for a borehole sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon well wellhead of the present invention;

fig. 11 is a diagram showing the effect of the telescopic line length adjustment mechanism for the drilling sand discharge line in an exemplary embodiment of the pumping assisted discharge piping system of the oil and gas drilling wellhead of the present invention.

Description of reference numerals:

the system comprises an A' -adjustable annular pumping and drainage assisting mechanism for a drilling sand discharge pipeline, a B-telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline and a C-hard pipeline body;

a ' 1-basic flange, A ' 2-gas injection joint, A ' 3-upper core tube, A ' 4-upper core tube flange, A ' 5-upper core tube snap ring, A ' 6-middle core tube (male), A ' 7-gas injection shell, A ' 8-inner hexagon screw and A ' 9-upper core tube snap ring fastening bolt;

b1-lower base pipe flange, B2-first-stage extension pipe, B3-lower base pipe, B4-first-stage extension pipe limiting ring, B5-upper base pipe, B6-second-stage extension pipe, B7-second-stage extension pipe flange, B8-oil return port, B9-inner hexagon screw and B10-oil injection port.

Detailed Description

Hereinafter, the oil and gas drilling wellhead pumping and exhausting assisted piping system will be described in detail with reference to the attached drawings and exemplary embodiments. It should be noted that "first", "second", "third", "fourth", "fifth", etc. are merely for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance. "upper," "lower," "inner," "outer," "left," and "right" are merely for convenience of description and relative positional or positional relationships, and do not indicate or imply that the referenced components must have that particular orientation or position.

In an exemplary embodiment of the invention, the oil and gas drilling wellhead pumping and draining manifold system comprises a plurality of hard pipeline pipes, the plurality of hard pipeline pipes comprise a first hard pipeline pipe and a second hard pipeline pipe which are arranged along the flowing direction of fluid, and the oil and gas drilling wellhead pumping and draining manifold system further comprises an adjustable drilling and draining pipeline annular pumping and draining mechanism and a telescopic pipeline length adjusting mechanism for the drilling and draining pipeline. Here, the hard pipe body may be a pipe body such as a tee, a quarter bend, a straight pipe, or the like. In addition, the hard pipeline body can also be one or more of a radial azimuth stepless angle adjusting mechanism (authorized bulletin number: CN106437579B) for a gas drilling manifold, a universal adjusting short joint (authorized bulletin number: CN206220883U) for the gas drilling manifold and a steering mechanism (CN207377518U) for a planetary gas drilling manifold.

In addition, the number of the adjustable annular pumping and drainage-assisting mechanisms of the drilling sand discharge pipeline can be one or more than two. The adjustable annular pumping and exhausting assisting mechanism for the drilling sand discharge pipeline can be arranged at a wellhead position and/or at a pipeline turning downstream position (for example, a pipeline right-angle turning downstream position) so as to realize a negative pressure pumping effect on the wellhead and/or the pipeline turning position, so that wellhead fluids (such as combustible gases including natural gas and the like or gas-solid mixed phases, multiphase fluids including gas-liquid-solid mixed phases and the like) can be pumped into a sand discharge manifold through the pumping effect, and local loss caused by turning of the fluids can be greatly reduced.

In addition, the number of the telescopic pipeline length adjusting mechanisms for the drilling sand discharge pipeline can be one or more. The telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline can be arranged between the adjacent adjustable drilling sand discharge pipeline annular pumping auxiliary discharge mechanism and the hard pipeline pipe body, so that telescopic connection between the adjacent adjustable drilling sand discharge pipeline annular pumping auxiliary discharge mechanism and the hard pipeline pipe body is realized. In addition, the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline can also be arranged between two adjacent hard pipeline pipes so as to realize telescopic connection between the two adjacent hard pipeline pipes.

In the exemplary embodiment, the adjustable annular pumping and drainage assisting mechanism of the drilling and sand discharging pipeline may comprise: the gas injection device comprises a base flange, a gas injection shell, a central core male pipe and an upper core pipe which are coaxially arranged.

The left side of the base flange may be used for connecting other components (e.g. a wellhead, an outlet end of some hard line), for example to each other by a flange connection or a collar. The outer wall on the right side of the basic flange is provided with an outer conical surface. For example, the outer wall of the right end portion of the tubular body of the base flange has a truncated cone curved surface having a predetermined width in the axial direction. The base flange also has an outer projection projecting radially outward. For example, the outer projection of the base flange may be flange-like.

The gas injection housing may include a left side having a first inner diameter, a right side having a second inner diameter, and one or more gas injection joints. Wherein the first inner diameter is greater than the second inner diameter, for example, the first inner diameter may be about 1/4 to 1/5 greater than the second inner diameter. The left side of the gas injection shell is fixedly connected with the outer protruding part of the basic flange through an anti-rotation component. The rotation preventing member is capable of restricting relative rotation between the gas injection housing and the base flange. For example, the rotation prevention member may be an inner polygonal screw, but the present invention is not limited thereto. In addition, the anti-rotation component can also be provided with a structure convenient for manual disassembly, so that the disassembly operation is convenient when the injection flanges with different specifications need to be replaced. The inner circumferential wall on the right side of the gas injection shell is provided with a first thread. For example, the inner circumferential wall of the right-side end portion of the gas-injection housing may be provided with a first thread having a predetermined width in the axial direction. The gas injection joint can communicate the space corresponding to the first inner diameter with outside gas. For example, the gas injection joint may communicate with the injection passage through the inner space of the gas injection housing, or may directly communicate with the injection passage, so as to inject the external gas into the main body line through the injection passage. The gas injection joint can be arranged on the gas injection shell in a threaded connection mode, and can also be connected through continuous casting. The external air may be supplied by a high pressure air pump or a forced draft fan. For example, the gas-injection joint may be disposed through the left side of the gas-injection housing.

The right side of the central core male pipe may be inserted into the left side of the upper core pipe and brought into close contact with the inner circumferential wall of the upper core pipe by the first sealing member. The first sealing element may be formed by a sealing ring and a sealing groove which are matched with each other, however, the present invention is not limited thereto, and other elements capable of achieving effective sealing action may be used. The outer circumferential wall on the left side of the central core male pipe can be provided with a second thread which can be matched with the first thread of the gas injection shell. The first thread and the second thread can be tightly matched, so that the central core male pipe can move leftwards or rightwards relative to the gas injection shell through the rotation around the shaft under the action of external force, namely move leftwards and rightwards along the axial direction. The core pin further has an inner tapered surface formed on the inner circumferential wall on the left side thereof. For example, the inner wall of the left end of the tube body of the core male tube is a circular truncated cone curved surface having a predetermined width in the axial direction. The inner conical surface of the central core male pipe can be matched with the outer conical surface of the base flange to form an adjustable injection channel. The injection channel is communicated with the gas injection joint. For example, the injection channel may be in the form of a circular band that is adjustable in size. For example, as the core pin rotates around the shaft clockwise or counterclockwise under the action of external force, the core pin moves leftwards or rightwards under the matching of the first thread and the second thread, so that the adjustment of the size of the injection channel is correspondingly realized, and even when the inner conical surface of the core pin completely contacts the outer conical surface of the base flange, the closing of the injection channel is realized.

The right side of the upper core tube can be connected to other components (e.g., the inlet end of the hard line pipe body). For example, the right side of the upper core tube may be flanged or clamped to the subsequent hard tube body.

In the exemplary embodiment, the telescopic pipe length adjustment mechanism for a drilling and sand discharging pipeline may include a lower base flange, a lower base pipe, an upper base pipe, a primary extension pipe, a limiting ring, and a secondary extension pipe, which are coaxially disposed.

The left side of the lower base flange can be connected with other components; the right side of the lower base flange may be provided with an outer protrusion protruding radially outward. The outer projection of the lower base flange may have a flange-like shape.

The left side of the lower base pipe can be fixedly connected with the outer protruding part of the lower base flange through an anti-rotating component. The anti-rotation member can restrict relative rotation between the lower base pipe and the lower base flange. For example, the rotation prevention member may be an inner polygonal screw, but the present invention is not limited thereto. The inner circumferential surface of the right side of the lower base pipe may be provided with a third screw thread having a predetermined width in the axial direction.

The upper base pipe may include a left side portion having a third inner diameter and a right side portion having a fourth inner diameter. Wherein the third inner diameter is greater than the fourth inner diameter. The outer circumferential wall of the left side portion of the upper base pipe may be provided with a fourth thread capable of being engaged with the third thread of the lower base pipe. Through the cooperation of fourth screw thread and third screw thread, can be in the same place upper foundation pipe and lower foundation pipe. The lower base pipe is similar to the female pipe and the upper base pipe is similar to the male pipe.

The primary extension pipe may include a left side portion having a first outer diameter, a right side portion having a second outer diameter, and a stopper protrusion disposed on an inner circumferential surface of the right side portion of the primary extension pipe. Wherein the first outer diameter is greater than the third inner diameter, and the second outer diameter is less than the third inner diameter. The left side part of the first-stage extension pipe is positioned between the left end surface of the left side part of the upper base pipe and the right end surface of the outer protruding part of the lower base flange; the right side portion of the first-stage extension pipe is located between the left end face of the right side portion of the upper base pipe and the right end face of the outer protruding portion of the lower base flange, and the first-stage extension pipe can move leftward or rightward in the axial direction in a space formed by the outer protruding portion of the lower base flange, the lower base pipe and the upper base pipe.

The limiting ring can be fixedly connected to the inner circumferential wall of the left side part of the primary extension pipe.

The secondary extension tube may include a left side portion having a third outer diameter, a middle convex portion having a fourth outer diameter, and a right side portion having a fifth outer diameter. The left side part, the middle convex part and the right side part of the secondary extension pipe are sequentially connected along the axial direction. The right side part of the secondary extension pipe can be connected with other components. For example, the right side portion of the secondary extension pipe may be connected with other components by a secondary extension pipe flange to make the connection manner more convenient and easy to handle, but the present invention is not limited thereto. And the third outer diameter is smaller than the fourth outer diameter, and the fifth outer diameter is smaller than the fourth outer diameter and equal to the fourth inner diameter. The left side portion of the secondary extension pipe can penetrate through the limiting ring and then be inserted into the right side portion of the lower base flange. For example, the limiting ring is sleeved on the left side part of the secondary extension pipe and is positioned between the right side part of the lower base flange and the convex part of the secondary extension pipe. The convex part of the second-stage extension pipe is positioned between the limiting protruding part and the limiting ring of the first-stage extension pipe, so that the second-stage extension pipe can move leftwards or rightwards between the limiting protruding part and the limiting ring of the first-stage extension pipe.

To the condition that adjustable well drilling sand discharge pipeline annular pumping helps row mechanism to set up at the well head, the basic flange of adjustable well drilling sand discharge pipeline annular pumping helps row mechanism the left side portion is connected with the well head, and the right side portion of the last core pipe of adjustable well drilling sand discharge pipeline annular pumping helps row mechanism is connected with the entry end of first hard pipeline body to can help row mechanism with well head and first hard pipeline body intercommunication through adjustable well drilling sand discharge pipeline annular pumping.

In the case where the adjustable drilling sand discharge pipeline annular suction drainage assisting mechanism is disposed between two hard pipeline bodies (for example, between a first and a second hard pipeline bodies that make a pipeline quarter turn with each other), the left side portion of the base flange of the adjustable drilling sand discharge pipeline annular suction drainage assisting mechanism is connected to the outlet end of the first hard pipeline body, and the right side portion of the upper core pipe of the adjustable drilling sand discharge pipeline annular suction drainage assisting mechanism is connected to the inlet end of the second hard pipeline body, so that the two hard pipeline bodies adjacent to each other can be communicated through the adjustable drilling sand discharge pipeline annular suction drainage assisting mechanism.

The left side portion of the lower base flange of the telescopic line length adjustment mechanism may be connected to an outlet end of a preceding one of two hard line pipe bodies adjacent to each other among the plurality of hard line pipe bodies, and the right side portion of the secondary extension pipe of the telescopic line length adjustment mechanism may be connected to an inlet end of a subsequent one of the two hard line pipe bodies adjacent to each other, so that the two hard line pipe bodies adjacent to each other in the front and rear can be telescopically connected.

In addition, the left side part of the lower base flange of the telescopic pipeline length adjusting mechanism is connected with the right side part of the upper core pipe of the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism, and the right side part of the second-stage extension pipe of the telescopic pipeline length adjusting mechanism is connected with the inlet end of the hard pipeline pipe body correspondingly positioned behind the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism, so that the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism and the hard pipeline pipe body which are sequentially arranged along the flowing direction of the fluid can be telescopically connected.

In addition, the right side part of the secondary extension pipe of the telescopic pipeline length adjusting mechanism is connected with the left side part of the base flange of the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism, and the left side part of the lower base flange of the telescopic pipeline length adjusting mechanism is connected with the outlet end of the hard pipeline pipe body correspondingly positioned in front of the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism, so that the hard pipeline pipe body and the adjustable well drilling sand discharge pipeline annular suction drainage assisting mechanism which are sequentially arranged in the fluid flowing direction can be telescopically connected.

In another exemplary embodiment of the present invention, the suction evacuation assisting mechanism may further include an upper core flange on the basis of the structure of the above exemplary embodiment. The upper core tube flange facilitates connecting the right side of the upper core tube with subsequent pipe (e.g., hard piping downstream of the sand discharge line). In addition, the suction and discharge assist mechanism may further include a gas compression device. The gas outlet of the gas compression device can be connected with the gas injection joint of the gas injection shell.

In another exemplary embodiment of the present invention, the suction evacuation mechanism may further comprise an upper core snap-fit on the structure of the above exemplary embodiment. Go up the core pipe joint spare and can be with the right side of well core public pipe and go up the core pipe chucking to limit the axial displacement between core pipe and the well core public pipe, thereby can ensure the sealed effect of core pipe and well core public pipe more effectively, avoid removing because of well core public pipe and remove and lead to well core public pipe and the sealed insecure of core pipe. However, the present invention is not limited to this, and for example, the structure of the first sealing member, or the overlapping manner and the overlapping dimension between the right side of the central core male pipe and the left side of the upper core male pipe may be set appropriately to ensure the sealing effect between the upper core pipe and the central core male pipe, thereby preventing the central core male pipe and the upper core pipe from being sealed insecurely due to the left-right movement of the central core male pipe.

In the suction evacuation assisting mechanism according to another exemplary embodiment of the present invention, the core pin may further include an outer convex circumferential portion provided on a left side portion of the core pin and located on a left side of the second thread of the core pin to further improve sealability of the first thread of the gas injection housing in cooperation with the second thread of the core pin. Here, the outer convex circumferential portion of the core male pipe may be an annular band that projects outward in the radial direction of the core male pipe, and may be, for example, in a flange-like shape. In addition, a second seal member may be further provided between the right side of the gas injection housing on which the first thread is provided and the outer flange of the core male pipe, thereby further ensuring the sealing effect. The second sealing element may be formed by a sealing ring and a sealing groove which are matched with each other, however, the invention is not limited thereto, and other elements capable of realizing effective sealing function are also possible.

In another exemplary embodiment of the suction and discharge assisting mechanism, the core male pipe may further include a rotation fitting portion capable of rotating the core male pipe about its central axis by an external force. Here, the swivel fitting portion may be provided on an outer wall of the center core male pipe between the left side of the upper core pipe and the right side of the gas injection housing. For example, the swivel fitting may be one or more swivel holes provided on the outer wall of the core male pipe at a position between the upper core pipe and the gas injection housing. The rotation operation of the centering core male pipe can be more conveniently carried out by arranging the rotation matching part. However, the present invention is not limited to this, and for example, the core male pipe may be rotated by a jig or the like, or the core male pipe may be rotated by the core upper pipe with the core upper pipe being fixedly fitted tightly to the core male pipe.

FIG. 2a is a schematic cross-sectional view of an adjustable annular pumping and discharging mechanism of a drilling and discharging line in an exemplary embodiment of a pumping and discharging manifold system of a wellhead of an oil and gas drilling well according to the present invention; fig. 2b shows a partially enlarged schematic view of I in fig. 2 a. Fig. 3 shows an external schematic view of an adjustable annular pumping and discharging mechanism of a drilling and discharging sand line in an exemplary embodiment of the pumping and discharging manifold system of the oil and gas drilling wellhead.

As shown in fig. 2a, 2b and 3, in an exemplary embodiment of the invention, the adjustable drilling and sand discharge line annular pumping and drainage aid mechanism a' may comprise the following components: a base flange A ' 1, a gas injection joint A ' 2, an upper core tube A ' 3, an upper core tube flange A ' 4, an upper core tube snap ring A ' 5, a central core tube (male) A ' 6, a gas injection shell A ' 7, a hexagon socket head cap screw A ' 8, and an upper core tube snap ring set bolt A ' 9 (shown in FIG. 3).

The upper core tube flange A '4 is connected with the upper core tube A' 3 through threads or in a welding mode, and the upper core tube flange A '4 and the upper core tube A' 3 can be integrally machined. The upper core pipe flange A' 4 is used for connecting with a downstream hard pipeline, and can be a flange connection or a clamping connection. The left side of the basic flange A' 1 is connected with an upstream hard pipeline, and the connection can be flange connection or clamping connection. The right side of the base flange A ' 1 is fastened with the gas injection housing A ' 7 by a set of hexagon socket head cap screws A ' 8. The air injection shell A '7 is provided with a group of holes (the number is not limited) in the radial direction and is connected with the air injection joint A' 2 in a threaded connection mode. The external cylindrical surface (large diameter) of the central core tube (male) A' 6 is provided with screw threads. The central core tube (male) A '6 is connected with the gas injection shell A' 7 through threads. When the core tube (male) a ' 6 is rotated, a portion of the left side of the core tube (male) a ' 6 moves left and right in the gas injection housing a ' 7 under the constraint and fit of the screw threads. The left side of the central tube (male) A '6 is hung in the gas injection shell A' 7. The upper core tube snap ring A '5 has a group (2), and the fastening bolts A' 9 are mutually tightened through the upper core tube snap ring. The central core tube (male) A ' 6 and the upper core tube A ' 3 limit the axial displacement between each other through an upper core tube snap ring A ' 5. The annular gap between the inner conical surface on the left side of the central core tube (male) A '6 and the outer conical surface on the right side of the base flange A' 1 is the injection channel of the mechanism.

When the left end and the right end of the adjustable annular pumping and exhausting-assisting mechanism A 'of the drilling sand discharge pipeline are fixed (namely, the left side of the base flange A' 1 is connected with an upstream hard pipeline, and the upper core pipe flange A '4 is connected with a downstream hard pipeline), only the central core pipe (male) A' 6 is a movable part in all the parts. The central core pipe (male) A '6 is rotated, the central core pipe (male) A' 6 can move left and right under the action of the threads, and the moving distance can be designed according to requirements. When the central core pipe (male) A ' 6 moves to the end to the left, the inner conical surface on the left side of the central core pipe (male) A ' 6 is contacted with the outer conical surface on the right side of the base flange A ' 1, so that the injection channel is closed; when the center tube (male) a' 6 moves rightward, the injection passage is gradually opened. Even in the working state, the spraying channel can be adjusted at any time by rotating the central core pipe (male) A' 6 without disassembling and replacing other parts and without stopping and waiting. Fig. 2a and 2b show the open state of the injection channel of the adjustable drilling and sand discharge line annular suction drainage aid mechanism. Fig. 4 and 5 show the closed state of the injection channel of the adjustable well sand discharge line annular suction drainage-assisting mechanism.

The number of the gas injection connectors A '2 on the gas injection housing A' 7 can be selected according to the required gas amount. When the gas amount is large, the number of the gas injection joints A' 2 is properly increased; when the air quantity is small, the redundant air injection joint A' 2 can be blocked. High-pressure gas is injected into the gas injection housing A '7 through the gas injection joint A' 2 and is injected into the main channel at a high speed through an annular gap (injection channel) between the inner conical surface on the left side of the core tube (male) A '6 and the outer conical surface on the right side of the base flange A' 1. The injection and entrainment of the high-speed airflow generates negative pressure near the base flange A' 1, so that the upstream fluid is sucked, and the flow resistance of the upstream fluid is reduced. When the adjustable annular pumping drainage-assisting mechanism A 'of the drilling sand discharge pipeline is arranged near a wellhead, the annular pumping drainage-assisting mechanism A' can be used for pumping fluid (combustible gas, drilling circulating fluid and the like) near the wellhead to avoid overflowing from the wellhead; when the A' adjustable annular pumping and discharging mechanism of the drilling sand discharge pipeline is arranged at the downstream of the elbow bend, the annular pumping and discharging mechanism can be used for reducing the local loss of fluid flowing through the elbow bend and ensuring that the fluid flows more smoothly. FIG. 6 illustrates an appearance effect diagram of an exemplary embodiment of the adjustable annular pumping and drainage mechanism of the drilling and sand discharge pipeline.

The adjustable annular pumping and exhausting-assisting mechanism for the drilling sand discharge pipeline in the oil-gas drilling wellhead pumping and exhausting-assisting piping system has the following characteristics:

(1) the device can be used independently, or can be used with one or more of a radial azimuth angle stepless angle adjusting mechanism (authorized bulletin number: CN106437579B), a gas drilling pipeline universal adjusting short joint (authorized bulletin number: CN206220883U) and a planetary gas drilling manifold steering mechanism (CN207377518U) for a gas drilling manifold to form a manifold system with more complete functions;

(2) by comprehensively applying different quantities and different positions to the adjustable annular pumping and exhausting mechanism of the drilling sand discharge pipeline, the invention can realize effective pumping of wellhead fluid (including multiphase fluid which is returned to the ground surface in the drilling process besides the combustible gas), suck the wellhead fluid (such as combustible gas: natural gas; such as multiphase fluid: gas-solid, gas-liquid-solid and the like) into the sand discharge manifold, and greatly reduce local loss in the flow conveying process of the sand discharge manifold;

(3) the adjustable annular pumping and drainage-assisting mechanism for the drilling and sand-discharging pipeline is independently connected to the gas injection pipeline, so that the pumping capacity of the mechanism can be adjusted by adjusting the gas amount;

(4) the adjustable annular pumping and discharging mechanism for the drilling and sand discharging pipeline can improve the safety of open wellhead operations such as tripping and replacing rubber cores under the condition that a small amount of natural gas is produced from the stratum, eliminates the safety risk problem possibly caused after combustible gas (such as natural gas and the like) of a shaft overflows from the wellhead, improves the safety of gas drilling operation of a gas-containing interval, and is more beneficial to the acceleration of gas drilling.

In another exemplary embodiment of the present invention, the telescopic line length adjustment mechanism for a drilling and sand discharging line may further include a first sealing member, a second sealing member, and a third sealing member on the basis of the structures of the above exemplary embodiments. Wherein the first sealing member may be disposed between the outer circumferential wall of the left portion of the primary extension pipe and the inner circumferential wall of the lower base pipe, thereby improving sealability that the outer circumferential wall of the left portion of the primary extension pipe and the inner circumferential wall of the lower base pipe are in contact connection with each other. For example, the first sealing member may be a seal ring and a seal groove that mate with each other. The second sealing member may be disposed between an outer circumferential wall of a left portion of the secondary extension pipe (e.g., a portion where the secondary extension pipe is inserted into the lower base flange) and an inner circumferential wall of the lower base flange, thereby improving sealability of the left portion of the secondary extension pipe and the inner circumferential wall of the lower base flange in contact connection with each other. For example, the second sealing member may be a seal ring and a seal groove that mate with each other. The third sealing member may be provided between the outer circumferential wall of the middle protrusion of the secondary extension pipe and the inner circumferential wall of the right portion of the primary extension pipe, thereby improving sealability of the contact connection between the outer circumferential wall of the middle protrusion of the secondary extension pipe and the inner circumferential wall of the right portion of the primary extension pipe. For example, the third sealing member may be a seal ring and a seal groove that mate with each other. However, the sealing member used in the present invention is not limited thereto, and other members capable of achieving an effective sealing function may be used.

In addition, the telescopic pipeline length adjusting mechanism can also comprise a liquid injection port. The liquid injection port can connect a space surrounded by the first, second, and third seal members to the first hydraulic press. For example, the liquid injection port may be a liquid injection port. Through will annotating the liquid mouth and be connected with hydraulic equipment, operating personnel can very conveniently realize pushing one-level extension pipe along the axial right side and pushing second grade extension pipe right through operating hydraulic equipment, realize the right removal of one-level extension pipe and the right removal of second grade extension pipe promptly. However, the present invention is not limited thereto, and for example, the rightward movement of the primary extension pipe and the rightward movement of the secondary extension pipe may be directly achieved by applying an external force to the right.

In another exemplary embodiment of the present invention, the telescopic line length adjustment mechanism may further include a fourth sealing member and a fifth sealing member on the basis of the first sealing member, the second sealing member and the third sealing member. The fourth sealing member may be disposed between an outer circumferential surface of a left portion of the upper base pipe and an inner circumferential surface of a right portion of the lower base pipe, so that sealability between the upper base pipe and the lower base pipe can be improved. For example, the fourth sealing member may be a seal ring and a seal groove that mate with each other. The fifth sealing member may be disposed between an inner circumferential surface of a right portion of the upper base pipe and an outer circumferential surface of a right portion of the secondary extension pipe, so that sealability at a contact portion of the upper base pipe and the secondary extension pipe can be improved. For example, the fifth sealing member may be a seal ring and a seal groove that cooperate with each other.

In addition, the telescopic pipeline length adjusting mechanism can also comprise a liquid return port. The liquid return port can connect a space surrounded by the first, third, fourth and fifth sealing members with the second hydraulic device. For example, the liquid return port may be an oil return port. Through being connected liquid return port and hydraulic equipment, operating personnel can very conveniently realize pushing one-level extension pipe along the axial left and pushing second grade extension pipe left through operating hydraulic equipment, realize the leftwards removal of one-level extension pipe and the leftwards removal of second grade extension pipe promptly. However, the present invention is not limited thereto, and for example, the leftward movement of the primary extension pipe and the leftward movement of the secondary extension pipe may be directly achieved by applying an external force to the left.

The telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline can be applied in different numbers and different positions in a combined manner. When the axial installation position of the pipeline has errors in the process of installing the manifold, the position of the connecting flange (or other connecting modes such as a coupling and the like) can be conveniently adjusted, and smooth installation is ensured.

FIG. 7a is a schematic diagram illustrating a telescoping line length adjustment mechanism for a drilling sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon drilling wellhead of the present invention; fig. 7b shows a sectional view corresponding to the section H-H in fig. 7 a. Fig. 8 shows a schematic external view of a telescopic line length adjustment mechanism for a drilling sand discharge line in an exemplary embodiment of a pumping assisted discharge piping system of an oil and gas drilling wellhead of the present invention. FIG. 9 is a schematic diagram illustrating a one-stage extension of a telescoping line length adjustment mechanism for a borehole sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon well wellhead of the present invention. FIG. 10 is a schematic diagram illustrating a two-stage extension of a telescoping line length adjustment mechanism for a borehole sand discharge line in an exemplary embodiment of a suction assisted discharge piping system for a hydrocarbon well wellhead of the present invention. Fig. 11 is a diagram showing the effect of the telescopic line length adjustment mechanism for the drilling sand discharge line in an exemplary embodiment of the pumping assisted discharge piping system of the oil and gas drilling wellhead of the present invention.

As shown in fig. 7a and 7B, in an exemplary embodiment of the present invention, a telescopic line length adjustment mechanism B for a drilling sand discharge line may include: the device comprises a lower basic pipe flange B1, a first-stage extension pipe B2, a lower basic pipe B3, a first-stage extension pipe limiting ring B4, an upper basic pipe B5, a second-stage extension pipe B6, a second-stage extension pipe flange B7, an oil return opening B8, an inner hexagon screw B9 and an oil filling opening B10.

The left side of the lower base pipe flange B1 is an upstream inlet and is connected with an upstream pipeline through a flange (or a clamping hoop and the like). The left side of the secondary extension pipe B6 is inserted into the lower base pipe flange B1, and the right side is connected with the secondary extension pipe flange B7 through threads. The right side of the second-stage extension pipe flange B7 is a downstream outlet connected with a downstream pipeline. The secondary extension pipe flange B7 can be a flange connection, or can be other connection methods such as a clamp. The right end of the lower base pipe flange B1 is fastened with a lower base pipe B3 through a hexagon socket head cap screw B9.

The upper base pipe B5 and the lower base pipe B3 are in threaded connection. The first-level extension pipe limiting ring B4 is in threaded connection with the first-level extension pipe B2. The right side of the primary extension pipe B2 is provided with a stopper protrusion protruding inward in the radial direction. The middle part of the second-stage extension pipe B6 is provided with a middle convex part which protrudes outwards along the radial direction, and the middle convex part can enable the second-stage extension pipe to move left and right between the limiting ring B4 of the first-stage extension pipe B2. For example, the pipe body of the second-stage extension pipe can be processed by a sleeve pipe with the diameter of 244.5mm, the material and the mechanical property of the sleeve pipe meet the API standard, and the sleeve pipe has high internal pressure resistance and can ensure the safety of gas drilling operation. An oil filling port B10 is arranged on the right side of the lower base pipe flange B1 and is used for filling hydraulic oil. The lower base tube B3 is tapped on the outside and connected to the oil return port B8 by threads.

When the lower base pipe flange B1 is connected to the upstream pipeline, the parts are fixed except for the primary extension pipe B2 and the secondary extension pipe B6. The primary extension pipe B2 can move left and right along the axial direction in the space formed by the lower base flange B1 and the upper base pipe B5 to realize primary extension, and the state can be shown in figure 9. The secondary extension tube B6 can move axially in the left and right end faces of the inner annular groove formed by the limit protrusion of the primary extension tube B2 and the limit ring B4 of the primary extension tube to realize secondary extension, and the state can be as shown in fig. 10. Can design multistage flexible according to the demand, not only be restricted to the second grade and stretch out and draw back, and flexible total length also can design according to the demand. For example, the primary expansion and contraction dimension can be 12-18 mm, and the secondary expansion and contraction dimension can be 40-50 mm. As shown in fig. 7a, a sealing groove may be provided between the respective members, and sealing may be performed by a sealing ring.

The oil filling port B10 on the lower base pipe flange B1 and the oil return port B8 on the lower base pipe B3 can be respectively connected with a hand pump. When the extension is needed, the hand pump connected with the oil filling port B10 presses in hydraulic oil to push the first-stage extension pipe B2 and the second-stage extension pipe B6 to extend, and at the moment, the hand pump connected with the oil return port B8 is in a pressure relief state. When the hand pump connected with the oil return port B8 is required to be contracted, hydraulic oil is pressed in by the hand pump to push the first-stage extension pipe B2 and the second-stage extension pipe B6 to be contracted, and at the moment, the hand pump connected with the oil injection port B10 is in a pressure relief state. In the practical application process, when the condition of the hand pump is not met, the hand pump can be driven in a mode of not adopting hydraulic oil. The oil return port B8 and the oil filling port B10 are opened, so that the internal cavity is communicated with the outside, and the secondary extension pipe B6 can be extended or contracted in a manual mode.

Fig. 8 and 11 are schematic external views showing the telescopic line length adjustment mechanism for a drilling sand discharge line in the present exemplary embodiment.

The telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline in the oil and gas drilling wellhead pumping and assisted discharge piping system can have the following characteristics:

(1) the device can be used with a common pipeline, and also can be used with one or more of a radial azimuth angle stepless angle adjusting mechanism (authorized bulletin number: CN106437579B) for a gas drilling manifold, a universal adjusting short joint (authorized bulletin number: CN206220883U) for the gas drilling pipeline and a steering mechanism (CN207377518U) for a planetary gas drilling manifold to form a manifold system with more complete functions;

(2) the telescopic pipeline length adjusting mechanisms are combined and applied in different quantities and different positions, so that the telescopic pipeline length adjusting mechanisms can be suitable for various conditions of installation of a drilling sand discharge manifold; when the axial installation position of the pipeline has errors in the process of installing the manifold, the position of the connecting flange (or other connecting modes such as a coupling and the like) can be conveniently adjusted, and smooth installation is ensured;

(3) the hydraulic mode of a hand pump can be adopted, and the extension and the shortening can be realized by adopting a manual dragging mode, so that the device is strong in operability, convenient and reliable;

(4) the extension length can be adjusted according to the requirement, and the device is very flexible and completely meets the requirement of the distance of pipeline butt joint in a drilling and sand discharging site;

(5) the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is mainly used in a gas drilling sand discharge manifold, but also can be used for connecting a gas supply manifold, and can be expanded and applied to hard manifold systems in other fields.

In summary, the beneficial effects of the invention include one or more of the following:

(1) the system comprises two large core modules of an axial inclined jet suction exhaust assisting mechanism and a telescopic axial length adjusting mechanism, and can also be provided with a radial azimuth angle stepless angle adjusting mechanism (authorized bulletin number: CN106437579B) for the existing gas drilling manifold, a universal adjusting short joint (authorized bulletin number: CN206220883U) for the gas drilling pipeline and a steering mechanism (CN207377518U) for the planetary gas drilling manifold to form a manifold system with more complete functions.

(2) By applying the axial inclined jet pumping and exhausting assisting mechanism and the telescopic axial length adjusting mechanism in combination in different sequences, different quantities and different positions, the well head fluid (such as combustible gas and multiphase fluid which returns to the ground surface in a drilling process) can be effectively pumped, the well head fluid (such as combustible gas: natural gas; such as multiphase fluid: gas-solid, gas-liquid-solid and the like) is pumped into the sand discharge manifold, the local loss is greatly reduced in the flowing and conveying process of the sand discharge manifold on the ground surface, and meanwhile, in the installation process of the manifold, when an error exists in the axial installation position, the position of a connecting flange (or other connecting modes, such as a coupling and the like) can be conveniently adjusted, and smooth installation is ensured.

(3) The axial inclined jet suction and discharge assisting mechanism can be independently connected into the gas injection pipeline, and the suction capacity of the mechanism is adjusted by adjusting the gas amount.

(4) The system can improve the safety of open wellhead operations such as tripping and replacing rubber cores under the condition that a small amount of natural gas is produced in the stratum, eliminates the safety risk problem possibly caused after combustible gas (such as natural gas and the like) of a shaft overflows from the wellhead, improves the safety of gas drilling operation in the gas-bearing stratum section, and is more beneficial to the acceleration and the play of the advantage of gas drilling.

Although the present invention has been described above in connection with the exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims

1. The oil and gas well mouth pumping and discharging-assisting pipe collecting system comprises a plurality of hard pipeline bodies, wherein the hard pipeline bodies comprise a first hard pipeline body and a second hard pipeline body which are arranged along the flowing direction of fluid, and the oil and gas well mouth pumping and discharging-assisting pipe collecting system is characterized by further comprising an adjustable well drilling sand discharging pipeline annular pumping and discharging-assisting mechanism and a telescopic pipeline length adjusting mechanism for a well drilling sand discharging pipeline, wherein,

the annular pumping drainage-assisting mechanism for the adjustable drilling sand discharge pipeline comprises: a base flange, a gas injection shell, a central core male pipe and an upper core pipe which are coaxially arranged along a first axial direction,

the base flange is provided with a left side part, a right side part provided with an outer conical surface and an outer protruding part protruding outwards along the radial direction;

the gas injection shell comprises a left side part with a first inner diameter, a right side part with a second inner diameter and one or more than two gas injection joints, wherein the first inner diameter is larger than the second inner diameter, the left side part of the gas injection shell is fixedly connected with the outer protruding part of the base flange through an anti-rotation component, the inner circumference of the right side part of the gas injection shell is provided with a first thread, and the gas injection joints can communicate the space corresponding to the first inner diameter with external gas;

the central male pipe comprises a right side part inserted into the left side of the upper core pipe and closely contacted with the inner circumferential wall of the upper core pipe through a first sealing member, a left side part with a second thread, and an inner conical surface formed on the inner circumference of the left side part of the central male pipe, wherein the second thread is arranged on the outer wall of the central male pipe and can be matched with the first thread to realize the left or right movement of the central male pipe relative to the gas injection shell corresponding to the axial rotation of the central male pipe, and the inner conical surface can be matched with the outer conical surface of the right side part of the base flange to form an adjustable injection channel communicated with the gas injection connector, so that the closing or opening of the injection channel is realized corresponding to the left or right movement of the central male pipe;

the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline comprises a lower base flange, a lower base pipe, an upper base pipe, a first-stage extension pipe, a limiting ring and a second-stage extension pipe which are coaxially arranged along a second axial direction, wherein,

the lower base flange has a left side portion and a right side portion provided with an outer protrusion portion protruding outward in the radial direction;

the lower base pipe is provided with a left side part fixedly connected with the outer protruding part of the right side part of the lower base flange through an anti-rotation component, and a right side part provided with a third thread on the inner circumferential surface;

the upper base pipe comprises a left side part with a third inner diameter and a right side part with a fourth inner diameter, wherein the third inner diameter is larger than the fourth inner diameter, and fourth threads which can be matched with the third threads on the right side part of the lower base pipe are arranged on the outer circumferential wall of the left side part of the upper base pipe;

the first-stage extension pipe comprises a left side part with a first outer diameter, a right side part with a second outer diameter and a limiting protrusion part arranged on the inner circumferential surface of the right side part of the first-stage extension pipe, wherein the first outer diameter is larger than the third inner diameter, the second outer diameter is smaller than the third inner diameter, the left side part of the first-stage extension pipe is positioned between the left end surface of the left side part of the upper base pipe and the right end surface of the outer protrusion part of the lower base flange, the right side part of the first-stage extension pipe is positioned between the left end surface of the right side part of the upper base pipe and the right end surface of the outer protrusion part of the lower base flange, and the first-stage extension pipe can move leftwards or rightwards in a space formed by the outer protrusion part of the lower base flange, the lower base pipe and the upper base pipe;

the limiting ring is fixedly connected to the inner circumferential wall of the left side part of the primary extension pipe;

the secondary extension pipe comprises a left side part with a third outer diameter, a middle convex part with a fourth outer diameter and a right side part with a fifth outer diameter which are sequentially connected, wherein the third outer diameter is smaller than the fourth outer diameter, the fifth outer diameter is smaller than the fourth outer diameter and is equal to the fourth inner diameter, the left side part of the secondary extension pipe penetrates through the limiting ring and then is inserted into the right side part of the lower base flange, and the middle convex part is positioned between the limiting protruding part and the limiting ring of the primary extension pipe so that the secondary extension pipe can move leftwards or rightwards between the limiting protruding part and the limiting ring of the primary extension pipe;

the left side part of a basic flange of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism is connected with a well head, and the right side part of an upper core pipe of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism is connected with the inlet end of a first hard pipeline body; or the left side part of the base flange of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism is connected with the outlet end of the first hard pipeline body, and the right side part of the upper core pipe of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism is connected with the inlet end of the second hard pipeline body;

the left side part of the lower base flange of the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is connected with the outlet end of the previous hard pipeline body in two adjacent hard pipeline bodies in the plurality of hard pipeline bodies, and the right side part of the secondary extension pipe of the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is connected with the inlet end of the next hard pipeline body in the two adjacent hard pipeline bodies; or the left side part of the lower basic flange of the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is connected with the right side part of the upper core pipe of the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism, and the right side part of the secondary extension pipe of the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is connected with the inlet end of the hard pipeline body correspondingly positioned behind the adjustable drilling sand discharge pipeline annular pumping drainage-assisting mechanism; or the right side part of the secondary extension pipe of the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is connected with the left side part of the base flange of the adjustable drilling sand discharge pipeline annular suction auxiliary discharge mechanism, and the left side part of the lower base flange of the telescopic pipeline length adjusting mechanism for the drilling sand discharge pipeline is connected with the outlet end of the hard pipeline body correspondingly positioned in front of the adjustable drilling sand discharge pipeline annular suction auxiliary discharge mechanism.

2. The oil and gas drilling wellhead suction and discharge assisting manifold system as claimed in claim 1, wherein the number of the adjustable drilling and sand discharging pipeline annular suction and discharge assisting mechanisms is one or more than two.

3. The system of claim 2, wherein the adjustable annular pumping and discharge aiding mechanism is disposed at a wellhead location and/or a location downstream of a tubing turn.

4. The oil and gas drilling wellhead suction and discharge aiding manifold system according to claim 1, wherein the adjustable drilling and sand discharge pipeline annular suction and discharge aiding mechanism further comprises an upper core pipe flange, and the upper core pipe flange can connect the right side part of an upper core pipe with an inlet end of a first hard pipeline pipe body or with an inlet end of a second hard pipeline pipe body.

5. The oil and gas drilling wellhead suction drainage-assisting manifold system as claimed in claim 1, wherein the adjustable drilling sand discharge pipeline annular suction drainage-assisting mechanism further comprises an upper core tube clamping member, and the upper core tube clamping member can clamp a right side portion of the middle core male tube and an upper core tube and limit axial displacement between the upper core tube and the middle core male tube.

6. The oil and gas drilling wellhead suction and discharge assist manifold system of claim 1, wherein the central core male pipe further comprises an outer convex circumferential portion disposed on the left side portion of the central core male pipe and protruding radially outward to the left of the second thread to improve the sealing of the first thread mating with the second thread.

7. The oil and gas drilling wellhead suction assisted piping and sinking system of claim 1, wherein the central core male pipe further comprises a rotation fitting portion capable of enabling the central core male pipe to rotate around the shaft under an external force.

8. The oil and gas drilling wellhead suction drainage-assisting manifold system as claimed in claim 1, wherein the adjustable drilling sand discharge pipeline annular suction drainage-assisting mechanism further comprises a gas compression device, and a gas outlet of the gas compression device is connected with the gas injection joint of the gas injection shell.

9. The oil and gas drilling wellhead suction assisted manifold system as claimed in claim 1, wherein the right side portion of the base flange is fixedly connected with the gas injection housing by a detachable anti-rotation member.

10. The oil and gas drilling wellhead suction assisted discharge piping system of claim 1, wherein the number of the telescopic line length adjustment mechanisms for the drilling sand discharge line is one or more.

11. The oil and gas drilling wellhead suction and discharge aiding manifold system according to claim 10, wherein the drilling and sand discharge line is arranged between the adjacent adjustable drilling and sand discharge line annular suction and discharge aiding mechanism and the hard line pipe body and/or between the adjacent two hard line pipe bodies by using the telescopic line length adjusting mechanism.

12. The oil and gas drilling wellhead suction assisted discharge piping system of claim 1, wherein the telescopic piping length adjustment mechanism for a drilling and sand discharge pipeline further comprises a secondary extension pipe flange capable of connecting the right side portion of a secondary extension pipe with an inlet end of a second hard piping body or with an inlet end of the latter hard piping body.

13. The oil and gas drilling wellhead suction and discharge assist manifold system according to claim 1, wherein the telescopic line length adjustment mechanism for a drilling and sand discharge line further comprises a first sealing member, a second sealing member and a third sealing member, wherein the first sealing member is disposed between the outer circumferential wall of the left side portion of the primary extension pipe and the inner circumferential wall of the lower base pipe, the second sealing member is disposed between the outer circumferential wall of the left side portion of the secondary extension pipe and the inner circumferential wall of the lower base flange, and the third sealing member is disposed between the outer circumferential wall of the middle convex portion of the secondary extension pipe and the inner circumferential wall of the right side portion of the primary extension pipe.

14. The suction and discharge assisted piping system of claim 13, wherein the telescopic line length adjustment mechanism for a drilling and discharge line further comprises a liquid injection port capable of connecting a space surrounded by the first, second and third sealing members to the first hydraulic press.

15. The oil and gas drilling wellhead suction and exhaust manifold assist system of claim 13, wherein one or more of the first, second and third seal members comprise cooperating seal rings and seal grooves.

16. The oil and gas drilling wellhead suction assisted discharge piping system of claim 13, wherein the telescopic piping length adjustment mechanism for a drilling and sand discharge pipeline further comprises a fourth sealing member disposed between a left side of the upper base pipe and a right side of the lower base pipe and a fifth sealing member disposed between a right side of the upper base pipe and a right side of the secondary extension pipe.

17. The oil and gas drilling wellhead suction assisted discharge piping system of claim 16, wherein the telescopic line length adjustment mechanism for a drilling and sand discharge line further comprises a fluid return port capable of connecting a space enclosed by the first, third, fourth and fifth sealing members to the second hydraulic device.

18. The oil and gas drilling wellhead suction and discharge assist manifold system of claim 16, wherein the fourth and/or fifth seal member comprises a seal ring and a seal groove that cooperate with each other.