Well killing manifold for blowout prevention of petroleum well

Abstract

The invention relates to the related technical field of petroleum well accessories, in particular to a well killing manifold for preventing blowout of a petroleum well, which comprises a main pipeline, a secondary pipeline, a primary secondary pipeline system, a secondary secondary pipeline system and a tertiary secondary pipeline system, and a primary branch pipeline and a secondary branch pipeline are formed on the side wall of the main pipeline; the secondary pipeline is connected with the main pipeline through the primary connecting mechanism; according to the blowout prevention well killing manifold for the petroleum well, the blowout prevention well killing manifold for the petroleum well is formed by combining a main pipeline, a secondary pipeline, a primary secondary pipeline system, a secondary secondary pipeline system and a tertiary secondary pipeline system, a primary butt joint disc is arranged on the main pipeline, and a secondary butt joint disc is integrally formed at the lower side end of the secondary pipeline; the first-level butt-joint disc and the second-level butt-joint disc are connected through the first-level connecting mechanism formed by combining the first-level fixing piece and the second-level fixing piece, compared with traditional flange disc connection, the connecting mode needs fewer bolts and nuts for connection, and therefore the mounting and dismounting efficiency of the structure is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field related to oil well accessories, in particular to a well killing manifold used for preventing blowout of oil wells. Background Art

[0002] Oil is buried in oil and gas layers tens to thousands of meters underground. To extract it, it is necessary to build an oil and gas channel between the ground and the underground oil and gas layer. This channel is the oil well, and the well-killing manifold is the part of the oil well located on the ground.

[0003] The existing Chinese patent document with the announcement number CN113153173B discloses an ultra-high pressure anti-sulfur and anti-erosion throttling well-killing manifold, wherein the scheme includes a throttling manifold and a well-killing manifold, wherein a wellhead drilling spool is connected between the throttling manifold and the well-killing manifold, wherein the throttling manifold and the well-killing manifold are both connected by pipe valves, wherein the throttling manifold includes a flange five-way, a blowout main pipeline and three parallel throttling pipelines, wherein the three throttling pipelines are respectively a manual throttling pipeline, a first hydraulic throttling pipeline and a second hydraulic throttling pipeline, which are short-circuited by flanges of different lengths, wherein the throttling manifold is centered on the flange five-way, wherein the longitudinal direction of the flange five-way is a blowout main pipeline connected to the drilling spool, and the left and right sides are both laterally controlled by a first manual flat valve and a hydraulic flat valve to respectively control the manual throttling pipeline, the first hydraulic throttling pipeline and the second hydraulic throttling pipeline;

[0004] However, the pipeline connections of the above scheme are all butted with flanges, and a large number of bolts and nuts are required for positioning and connection during the connection process, which results in a lot of time spent on disassembly and assembly of the structure. In addition, there is a hidden danger of loosening of ordinary bolt structures, which leads to a decrease in the sealing of the connection, thereby causing blowout leakage. Therefore, the present invention proposes a well-killing manifold for preventing blowouts in oil wells to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a well killing manifold for preventing blowout of oil wells, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a well killing manifold for preventing blowout of oil wells, comprising:

[0007] A main pipeline, the side wall of which is formed with a primary branch pipeline and a secondary branch pipeline;

[0008] A secondary pipeline, wherein the secondary pipeline is connected to the main pipeline through a primary connection mechanism, and a third-level branch pipeline is formed on the side wall of the secondary pipeline;

[0009] A primary secondary pipeline system, wherein the primary secondary pipeline system is connected to the primary branch pipeline via a secondary connecting mechanism;

[0010] A secondary secondary pipeline system, wherein the secondary secondary pipeline system is connected to the secondary branch pipeline via a tertiary connection mechanism;

[0011] A three-level secondary pipeline system is connected to the three-level branch pipeline through a four-level connecting mechanism.

[0012] Preferably, a primary docking plate is integrally formed on the upper end face of the main pipe, a secondary docking plate is integrally formed on the lower side end of the secondary pipe, the primary connecting mechanism includes a primary fixing member and a secondary fixing member, the inner side walls of the primary fixing member and the secondary fixing member are both formed with fixing grooves, both ends of the primary fixing member are integrally formed with a primary connecting seat, and both ends of the secondary fixing member are integrally formed with a secondary connecting seat.

[0013] Preferably, the primary connecting seat and the secondary connecting seat are correspondingly provided with a primary mounting hole and a secondary mounting hole, and the primary connecting seat and the secondary connecting seat are positioned and connected by bolts and nuts, and when the bolts and nuts are actually tightened, the primary docking plate and the secondary docking plate form a docking in the fixing groove.

[0014] Preferably, a primary sealing groove is provided on the inner side surface of the primary docking plate, and a secondary sealing groove is provided on the inner side surface of the secondary docking plate. The primary sealing groove and the secondary sealing groove are arranged correspondingly, and rubber sealing rings are embedded and installed in the primary sealing groove and the secondary sealing groove. When the bolts and nuts are actually tightened, the rubber sealing rings are in a compressed state.

[0015] Preferably, a primary sealing ring is integrally formed at the bottom of the primary sealing groove, and a secondary sealing ring is integrally formed at the bottom of the secondary sealing groove. Both the primary sealing ring and the secondary sealing ring are annular raised structures with a semicircular cross-section, and both the primary sealing ring and the secondary sealing ring are provided with multiple circles. When the rubber sealing ring is actually installed, the primary sealing ring and the secondary sealing ring are embedded in the rubber body of the rubber sealing ring.

[0016] Preferably, the fixing groove is a semi-annular notch with an isosceles trapezoidal cross section, and the edge dimensions of the primary docking plate and the secondary docking plate are matched with the fixing groove.

[0017] Preferably, the connection modes of the secondary connection mechanism, the tertiary connection mechanism and the quaternary connection mechanism are the same as the connection mode of the primary connection mechanism.

[0018] Preferably, a nut groove is provided on the outer end face of the secondary connecting seat, and the nut is embedded in the nut groove during actual installation; a spring groove is provided on the edge of the primary mounting hole on the primary connecting seat, and a push block groove is provided on the side wall of the spring groove; the bottom of the spring groove is connected to a pressure rod via a supporting spring, and a push block is integrally formed on the side wall of the pressure rod, the push block is movably arranged in the push block groove, and a locking column is integrally formed on the outer end face of the push block.

[0019] Preferably, a locking hole is provided on the inner end surface of the nut of the bolt, and the locking hole is arranged around the circumference of the screw rod of the bolt. When the bolt and nut are actually tightened and the support spring is in a reset state, the locking column is embedded in the locking hole.

[0020] Preferably, when the pressure rod is completely pushed into the spring groove, the engaging column is completely disengaged from the engaging hole, and the edge line of the end surface of the engaging column is chamfered.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. An oil well blowout prevention and well killing manifold composed of a main pipeline, a secondary pipeline, a primary secondary pipeline system, a secondary secondary pipeline system and a tertiary secondary pipeline system is provided, and a primary docking plate is provided on the main pipeline, a secondary docking plate is integrally formed at the lower side end of the secondary pipeline, and the primary docking plate and the secondary docking plate are connected by a primary connecting mechanism composed of a primary fixing member and a secondary fixing member. Compared with the traditional flange connection, this connection method requires fewer bolts and nuts, thereby effectively improving the installation and disassembly efficiency of the structure;

[0023] 2. By opening a spring groove and a push block groove on the primary connecting seat, and by arranging a supporting spring, a pressure rod, a push block, a locking column, and opening a locking hole on the inner end face of the nut of the bolt, the locking column is embedded in the locking hole through the force of the supporting spring, thereby forming a locking effect on the bolt, thereby avoiding loosening of the connection structure between the pipelines to prevent leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 A half-section view of the present invention;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 5 This is a schematic diagram of the primary connection mechanism of the present invention;

[0029] Figure 6 It is a half-section view of the primary connection mechanism of the present invention;

[0030] Figure 7 for Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0031] Figure 8 for Figure 7 A magnified schematic diagram of the structure at D in the middle;

[0032] Fig. 9 It is a schematic diagram of the distribution of the engaging holes of the present invention.

[0033] In the figure: main pipeline 1, secondary pipeline 2, primary connecting mechanism 3, primary secondary pipeline system 4, secondary secondary pipeline system 5, tertiary secondary pipeline system 6, primary docking plate 7, secondary docking plate 8, primary branch pipeline 11, secondary branch pipeline 12, tertiary branch pipeline 13, secondary connecting mechanism 14, tertiary connecting mechanism 15, quaternary connecting mechanism 16, primary fixing part 17, secondary fixing part 18, primary connecting seat 19, secondary connecting seat 20, primary mounting hole 21, secondary mounting hole 22, bolt 23, nut 24, fixing groove 25, rubber sealing ring 26, primary sealing ring 27, secondary sealing ring 28, nut groove 29, push block groove 30, support spring 31, pressure rod 32, push block 34, engaging column 35, engaging hole 36. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 9 The present invention provides the following three preferred embodiments:

[0036] Embodiment 1: A well-killing manifold for preventing blowout of an oil well, comprising a main pipeline 1, a secondary pipeline 2, a primary secondary pipeline system 4, a secondary secondary pipeline system 5 and a tertiary secondary pipeline system 6, wherein the side wall of the main pipeline 1 is formed with a primary branch pipeline 11 and a secondary branch pipeline 12, the secondary pipeline 2 is connected to the main pipeline 1 through a primary connecting mechanism 3, and a tertiary branch pipeline 13 is formed on the side wall of the secondary pipeline 2, the primary secondary pipeline system 4 is connected to the primary branch pipeline 11 through a secondary connecting mechanism 14, and the secondary secondary pipeline system 5 is connected to the primary branch pipeline 11 through a tertiary connecting mechanism 1 5 is connected to the secondary branch pipeline 12, the tertiary secondary pipeline system 6 is connected to the tertiary branch pipeline 13 through the fourth connection mechanism 16, the upper end surface of the main pipeline 1 is integrally formed with a primary docking plate 7, the lower side end of the secondary pipeline 2 is integrally formed with a secondary docking plate 8, the primary connection mechanism 3 includes a primary fixing member 17 and a secondary fixing member 18, the inner side walls of the primary fixing member 17 and the secondary fixing member 18 are both formed with fixing grooves 25, both ends of the primary fixing member 17 are integrally formed with primary connection seats 19, and both ends of the secondary fixing member 18 are integrally formed with secondary connection seats 20.

[0037] A primary mounting hole 21 and a secondary mounting hole 22 are correspondingly provided on the primary connecting seat 19 and the secondary connecting seat 20, and the primary connecting seat 19 and the secondary connecting seat 20 are positioned and connected by bolts 23 and nuts 24, and when the bolts 23 and nuts 24 are actually tightened, the primary docking plate 7 and the secondary docking plate 8 are docked in the fixing groove 25. By setting an oil well blowout prevention and well pressure manifold composed of a main pipeline 1, a secondary pipeline 2, a primary secondary pipeline system 4, a secondary secondary pipeline system 5 and a tertiary secondary pipeline system 6, and setting a primary docking plate 7 on the main pipeline 1, a secondary docking plate 8 is integrally formed at the lower side end of the secondary pipeline 2, and the primary docking plate 7 and the secondary docking plate 8 are connected by a primary connecting mechanism 3 composed of a primary fixing piece 17 and a secondary fixing piece 18. Compared with the traditional flange connection, this connection method requires fewer bolts and nuts for connection, thereby effectively improving the installation and disassembly efficiency of the structure.

[0038] Embodiment 2: On the basis of embodiment 1, a primary sealing groove is provided on the inner side surface of the primary docking plate 7, and a secondary sealing groove is provided on the inner side surface of the secondary docking plate 8. The primary sealing groove and the secondary sealing groove are arranged correspondingly, and rubber sealing rings 26 are embedded and installed in the primary sealing groove and the secondary sealing groove. When the bolts 23 and the nuts 24 are actually tightened, the rubber sealing ring 26 is in a compressed state.

[0039] A primary sealing ring 27 is integrally formed at the bottom of the primary sealing groove, and a secondary sealing ring 28 is integrally formed at the bottom of the secondary sealing groove. Both the primary sealing ring 27 and the secondary sealing ring 28 are annular raised structures with semicircular cross-sections, and both the primary sealing ring 27 and the secondary sealing ring 28 are provided with multiple circles. When the rubber sealing ring 26 is actually installed, the primary sealing ring 27 and the secondary sealing ring 28 are both embedded in the rubber body of the rubber sealing ring 26, thereby further improving the sealing performance at the connection position between the primary docking plate 7 and the secondary docking plate 8.

[0040] The fixing groove 25 is a semi-annular notch with an isosceles trapezoidal cross section, and the edge dimensions of the primary docking plate 7 and the secondary docking plate 8 are matched with the fixing groove 25 .

[0041] The connection methods of the secondary connection mechanism 14 , the tertiary connection mechanism 15 , and the quaternary connection mechanism 16 are all the same as the connection method of the primary connection mechanism 3 .

[0042] Embodiment 3: On the basis of embodiment 2, a nut groove 29 is provided on the outer end face of the secondary connecting seat 20, and the nut 24 is embedded in the nut groove 29 during actual installation. A spring groove is provided on the edge of the primary mounting hole 21 on the primary connecting seat 19, and a push block groove 30 is provided on the side wall of the spring groove. The bottom of the spring groove is connected to a pressure rod 32 through a supporting spring 31, and a push block 34 is integrally formed on the side wall of the pressure rod 32. The push block 34 is movably arranged in the push block groove 30, and a locking column 35 is integrally formed on the outer end face of the push block 34.

[0043] A locking hole 36 is provided on the inner end face of the nut of the bolt 23, and the locking hole 36 is arranged in a circle around the circumference of the screw rod of the bolt 23. When the bolt 23 and the nut 24 are actually tightened and the support spring 31 is in the reset state, the locking column 35 is embedded in the locking hole 36. By providing a spring groove and a push block groove 30 on the primary connecting seat 19, and by providing a support spring 31, a pressure rod 32, a push block 34, and a locking column 35, and providing a locking hole 36 on the inner end face of the nut of the bolt 23, the locking column 35 is embedded in the locking hole 36 by the force of the support spring 31, thereby forming a locking effect on the bolt 23, thereby avoiding loosening of the connection structure between the pipelines to prevent leakage.

[0044] When the pressure rod 32 is fully pushed into the spring groove, the engaging column 35 is completely disengaged from the engaging hole 36 , and the edge line of the end surface of the engaging column 35 is chamfered to facilitate the insertion of the engaging column 35 into the engaging hole 36 .

[0045] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A well-killing manifold for preventing oil well blowout, characterized in that: include: A main pipeline (1), wherein a primary branch pipeline (11) and a secondary branch pipeline (12) are formed on the side wall of the main pipeline (1); A secondary pipeline (2), wherein the secondary pipeline (2) is connected to the main pipeline (1) via a primary connection mechanism (3), and a tertiary branch pipeline (13) is formed on the side wall of the secondary pipeline (2); A primary secondary pipeline system (4), wherein the primary secondary pipeline system (4) is connected to the primary branch pipeline (11) via a secondary connection mechanism (14); A secondary secondary pipeline system (5), wherein the secondary secondary pipeline system (5) is connected to the secondary branch pipeline (12) via a tertiary connection mechanism (15); A tertiary secondary pipeline system (6), wherein the tertiary secondary pipeline system (6) is connected to a tertiary branch pipeline (13) via a quaternary connection mechanism (16).

2. A well-killing manifold for preventing blowout in oil wells according to claim 1, characterized in that: The upper end surface of the main pipe (1) is integrally formed with a primary docking plate (7), the lower side end of the secondary pipe (2) is integrally formed with a secondary docking plate (8), the primary connection mechanism (3) comprises a primary fixing member (17) and a secondary fixing member (18), the inner side walls of the primary fixing member (17) and the secondary fixing member (18) are both formed with fixing grooves (25), both ends of the primary fixing member (17) are integrally formed with primary connection seats (19), and both ends of the secondary fixing member (18) are integrally formed with secondary connection seats (20).

3. The well-killing manifold for preventing blowout of oil wells according to claim 2 is characterized in that: The primary connection seat (19) and the secondary connection seat (20) are provided with a primary installation hole (21) and a secondary installation hole (22) respectively, and the primary connection seat (19) and the secondary connection seat (20) are positioned and connected by bolts (23) and nuts (24), and when the bolts (23) and nuts (24) are actually tightened, the primary docking plate (7) and the secondary docking plate (8) are docked in the fixing groove (25).

4. The well-killing manifold for preventing blowout of oil wells according to claim 3 is characterized in that: The inner side surface of the primary docking plate (7) is provided with a primary sealing groove, and the inner side surface of the secondary docking plate (8) is provided with a secondary sealing groove. The primary sealing groove and the secondary sealing groove are arranged correspondingly, and rubber sealing rings (26) are embedded and installed in the primary sealing groove and the secondary sealing groove. When the bolts (23) and nuts (24) are actually tightened, the rubber sealing rings (26) are in a compressed state.

5. The well-killing manifold for preventing blowout of oil wells according to claim 4 is characterized in that: A primary sealing ring (27) is integrally formed at the bottom of the primary sealing groove, and a secondary sealing ring (28) is integrally formed at the bottom of the secondary sealing groove. Both the primary sealing ring (27) and the secondary sealing ring (28) are annular protruding structures with semicircular cross-sections, and both the primary sealing ring (27) and the secondary sealing ring (28) are provided with multiple circles. When the rubber sealing ring (26) is actually installed, the primary sealing ring (27) and the secondary sealing ring (28) are embedded in the rubber body of the rubber sealing ring (26).

6. The well-killing manifold for preventing blowout of oil wells according to claim 5 is characterized in that: The fixing groove (25) is a semi-annular notch with an isosceles trapezoidal cross section, and the edge dimensions of the primary docking plate (7) and the secondary docking plate (8) are arranged to match the fixing groove (25).

7. The well-killing manifold for preventing blowout of oil wells according to claim 6 is characterized in that: The connection methods of the secondary connection mechanism (14), the tertiary connection mechanism (15) and the quaternary connection mechanism (16) are the same as the connection method of the primary connection mechanism (3).

8. The well-killing manifold for preventing blowout of oil wells according to claim 7 is characterized in that: The outer end surface of the secondary connecting seat (20) is provided with a nut groove (29), and the nut (24) is embedded in the nut groove (29) during actual installation. The edge of the primary mounting hole (21) on the primary connecting seat (19) is provided with a spring groove, and a push block groove (30) is provided on the side wall of the spring groove. The bottom of the spring groove is connected to a pressure rod (32) through a supporting spring (31), and a push block (34) is integrally formed on the side wall of the pressure rod (32). The push block (34) is movably arranged in the push block groove (30), and a locking column (35) is integrally formed on the outer end surface of the push block (34).

9. A well-killing manifold for preventing blowout in oil wells according to claim 8, characterized in that: The inner end surface of the nut of the bolt (23) is provided with a snap-fit ​​hole (36), and the snap-fit ​​hole (36) is arranged around the circumference of the screw rod of the bolt (23). When the bolt (23) and the nut (24) are actually tightened and the support spring (31) is in a reset state, the snap-fit ​​column (35) is embedded in the snap-fit ​​hole (36).

10. The well killing manifold for preventing blowout of oil wells according to claim 9, characterized in that: When the pressing rod (32) is completely pushed into the spring groove, the engaging column (35) is completely disengaged from the engaging hole (36), and the edge line of the end surface of the engaging column (35) is chamfered.

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