Mud blowout preventer box for under-pressure operation equipment

Abstract

The invention discloses a mud blowout preventer box for under-pressure operation equipment, and relates to the technical field of well drilling blowout prevention equipment, the mud blowout preventer box comprises a box body, a gland and a bottom plate, the box body is provided with a center hole for a drilling tool to penetrate through, the side wall of the box body is provided with a discharge port, and the top end of the box body is provided with a first sealing compression ring; a second sealing compression ring is arranged at the bottom end of the box body, and the first sealing compression ring and the second sealing compression ring are both made of elastic materials; the gland is installed at the top of the box body and used for extruding the first sealing pressing ring, a first through hole used for being communicated with the center hole is formed in the gland, the bottom plate is installed at the bottom of the box body and used for extruding the second sealing pressing ring, and a second through hole used for being communicated with the center hole is formed in the bottom plate; and fixing structures for fixing the gland and the bottom plate are respectively arranged on the box body. The drilling tool has the effects that slurry in the drilling tool can be effectively prevented from being sprayed out during shackling, and a drill floor and the surrounding environment are prevented from being polluted.

Description

Technical Field

[0001] The present application relates to the technical field of drilling blowout preventer equipment, and in particular to a mud blowout preventer box for pressure working equipment.

[0002] Background technology.

[0003] Pressure-operated equipment plays an important role in oil drilling operations. However, when pressure-operated equipment is in use, especially during single-root and drilling operations, the drill bit needs to be frequently disassembled. The mud or workover fluid remaining in the drill bit is easy to spray out and cause environmental pollution.

[0004] At present, in order to solve the problem of mud spraying when the drill bit is unfastened, the commonly used methods include using a simple sealing cover or sleeve to seal the drill bit interface to prevent mud from spraying. The advantages of these methods are simple structure and low cost, but they are prone to leakage under high pressure environment, and the sealing performance is unstable. They cannot effectively prevent large amounts of mud from spraying out, resulting in contamination of the drilling platform and surrounding tools, which increases the difficulty of subsequent cleaning work. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a mud blowout preventer box for pressure working equipment.

[0006] The present application provides a mud blowout preventer box for pressure working equipment, which adopts the following technical solution: A mud blowout preventer box for pressurized working equipment comprises a box body, a gland and a bottom plate, the box body is provided with a center hole for a drill tool to pass through, the side wall of the box body is provided with a discharge port, the top end of the box body is provided with a first sealing ring, the bottom end of the box body is provided with a second sealing ring, the first sealing ring and the second sealing ring are both made of elastic material; the gland is installed on the top of the box body and is used to extrude the first sealing ring, the gland is provided with a first through hole for communicating with the center hole, the bottom plate is installed on the bottom of the box body and is used to extrude the second sealing ring, the bottom plate is provided with a second through hole for communicating with the center hole, and the box body is provided with fixing structures for fixing the gland and the bottom plate, respectively.

[0007] Optionally, a first crimping groove connected to the center hole is provided at the top of the box body, the first sealing pressure ring is arranged in the first crimping groove, and a first crimping ring is fixedly provided at the bottom end of the pressure cover, and the first crimping ring is adapted to the first crimping groove; a second crimping groove connected to the center hole is provided at the bottom end of the box body, the second sealing pressure ring is arranged in the second crimping groove, and a second crimping ring is fixedly provided at the top of the base plate, and the second crimping ring is adapted to the second crimping groove.

[0008] Optionally, an end of the first crimping ring away from the pressure cover and an end of the second crimping ring away from the bottom plate are both provided with an arc convex surface.

[0009] Optionally, a plurality of cavities are provided inside the first sealing pressure ring and the second sealing pressure ring, and each of the cavities is filled with a rubber elastic ball.

[0010] Optionally, the side walls of the first crimping groove are provided with a plurality of slide grooves, a top block is slidably arranged in each of the slide grooves, and the box body is provided with a driving structure for driving each of the top blocks to slide in a direction approaching each other.

[0011] Optionally, the driving structure includes a driving ring and a push rod, a accommodating cavity connected to each of the sliding grooves is opened in the box body, the driving ring is slidably arranged in the accommodating cavity, the inner side wall of the driving ring is inclined, the end surfaces of each of the push blocks away from each other are provided with guiding inclined surfaces, and the guiding inclined surfaces on each of the push blocks abut against the inner side wall of the driving ring, the push rod is fixedly arranged on the driving ring and is used to abut against the pressure cover.

[0012] Optionally, an adjustment ring is slidably arranged in the first crimping groove, the adjustment ring is arranged between the first sealing pressure ring and the bottom wall of the first crimping groove, and an elastic member is arranged in the first crimping groove for driving the adjustment ring to slide towards the first sealing pressure ring.

[0013] Optionally, the elastic member includes an elastic steel ring, which is arranged in a wave shape, and one end of the elastic steel ring abuts against the bottom wall of the first crimping groove, and the other end of the elastic steel ring abuts against the adjustment ring.

[0014] Optionally, the inner side wall of the adjustment ring is inclined, and the inner diameter of the adjustment ring gradually increases in a direction away from the bottom wall of the first crimping groove.

[0015] Optionally, the fixing structure includes a threaded barrel and a clamping bolt, the threaded barrel is provided with multiple ones and respectively fixed on the side walls at the top or bottom position of the box body, the clamping bolt is adapted to the threaded barrel, and the pressure cover and the bottom plate are provided with multiple connecting holes for the clamping bolts to pass through.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application provides a mud blowout preventer box for pressure-operated equipment, which can effectively prevent the mud in the drill tool from spraying out when the buckle is shackled, thereby avoiding contamination of the drilling platform and the surrounding environment. Specifically, the top and bottom ends of the box body are respectively provided with a first sealing pressure ring and a second sealing pressure ring, and these sealing pressure rings are made of elastic material. The first sealing pressure ring can abut against the side wall of the drill rod under the pressure of the gland, and effectively close the gap between the drill rod and the box body. The second sealing pressure ring can abut against the side wall of the drill tool under the pressure of the bottom plate, and effectively close the gap between the drill tool and the box body to ensure that the mud will not leak. At the same time, the side wall of the box body is provided with a discharge port. When the drill rod is removed from the drilling tool, the mud in the drilling tool is all sprayed into the box body, and the mud in the box body is smoothly discharged to the mud storage through the discharge port, thereby effectively preventing a large amount of mud from spraying out, resulting in contamination of the drilling platform and surrounding tools. In addition, the design of the fixed structure enables the gland and the bottom plate to be firmly fixed on the box body, ensuring the stability and reliability of the entire device.

[0017] 2. The present application limits the position and deformation direction of the first sealing pressure ring and the second sealing pressure ring respectively through the design of the first crimping groove and the second crimping groove, so that the first sealing pressure ring and the second sealing pressure ring can better fit the drill pipe and the drill tool, thereby enhancing the sealing effect; further, by arranging a first crimping ring adapted to the first crimping groove on the pressure cover, and arranging a second crimping ring adapted to the second crimping groove on the bottom plate, the sealing between the box body and the pressure cover and the bottom plate is increased, and the positioning of the pressure cover and the bottom plate when they are installed on the box body is more convenient, thereby improving the assembly efficiency.

[0018] 3. In the present application, a plurality of slide grooves are provided on the side wall of the first crimping groove, and a top block is slidably arranged in each slide groove. When the first sealing pressure ring is squeezed and pressed against the side wall of the drill pipe, the driving structure drives the top blocks to approach each other, and applies a certain lateral squeezing force to the first sealing pressure ring, so that the first sealing pressure ring is deformed toward the middle, which can effectively enhance the sealing performance and sealing reliability of the first sealing pressure ring, and ensure that it can still maintain a good sealing effect under high pressure environment.

[0019] 4. The present application sets an adjustment ring in the first crimping groove, and the adjustment ring can slide towards the first sealing pressure ring under the action of the elastic member, and form an elastic extrusion force on the first sealing pressure ring, thereby adaptively adjusting the contact pressure between the first sealing pressure ring and the drill bit, ensuring that stable sealing performance can be maintained under different pressure conditions, thereby improving the reliability and service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a cross-sectional view of the overall structure of an embodiment of the present application; Figure 3 yes Figure 2 A magnified view of part A; Figure 4 It is a schematic diagram of the structure of the elastic steel ring used to express the embodiment of the present application.

[0021] Explanation of the reference numerals: 1. box body; 101. center hole; 102. discharge port; 103. threaded barrel; 104. clamping bolt; 105. handle; 106. first crimping groove; 107. first sealing pressure ring; 108. second crimping groove; 109. second sealing pressure ring; 110. cavity; 111. rubber elastic ball; 112. adjustment ring; 113. elastic steel ring; 114. slide groove; 115. top block; 116. drive ring; 117. push rod; 118. accommodating cavity; 119. mounting groove; 120. disk cover; 2. pressure cover; 21. first through hole; 22. first crimping ring; 3. bottom plate; 31. second through hole; 32. side plate; 321. mounting hole; 33. second crimping ring. DETAILED DESCRIPTION

[0022] The following will be combined with the attached Figure 1 -Attached Figure 4 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0023] The inventor of this application has found that the blowout preventer box used in existing drilling and workover equipment cannot meet the needs of pressure-operated equipment, resulting in mud spraying out when disassembling the drilling tool, seriously contaminating the drilling platform and surrounding tools, and causing great trouble for subsequent cleaning work. To this end, this application discloses a mud blowout preventer box for pressure-operated equipment, which mainly adopts the following scheme: The present application embodiment discloses a mud blowout preventer box for pressure working equipment. Figure 1 and Figure 2 , including a box body 1, a pressure cover 2 installed on the top of the box body 1, and a bottom plate 3 installed at the bottom of the box body 1. The box body 1 is provided with a center hole 101, and the center hole 101 is used to accommodate a drilling tool. The diameter of the center hole 101 is slightly larger than the outer diameter of the drilling tool to ensure that the drilling tool passes smoothly. The pressure cover 2 is provided with a first through hole 21 for connecting to the center hole 101, and the bottom plate 3 is provided with a second through hole 31 for connecting to the center hole 101. The side wall of the box body 1 is provided with a discharge port 102, and the discharge port 102 is used to discharge the mud in the box body 1.

[0024] Reference Figure 1The box body 1 is respectively provided with fixing structures for fixing the gland 2 and the bottom plate 3, the fixing structures include threaded barrels 103 and clamping bolts 104, a plurality of threaded barrels 103 are provided and are respectively fixed on the side walls at the top or bottom position of the box body 1, the threaded barrels 103 located at the top of the box body 1 are evenly spaced along the circumference of the box body 1, and the threaded barrels 103 located at the bottom of the box body 1 are evenly spaced along the circumference of the box body 1, and the clamping bolts 104 are adapted to the threaded barrels 103, and a plurality of connecting holes for the clamping bolts 104 to pass through are provided on the gland 2 and the bottom plate 3, the connecting holes on the gland 2 correspond one-to-one to the threaded barrels 103 at the top of the box body 1, and the connecting holes on the bottom plate 3 correspond one-to-one to the threaded barrels 103 at the bottom of the box body 1.

[0025] Reference Figure 1 , handles 105 are fixedly provided on both sides of the box body 1, and the handles 105 on both sides of the box body 1 are convenient for hoisting the box body 1. The staff can also support the box body 1 through the handles 105 on both sides to install the box body 1, which increases the convenience of use. In addition, side panels 32 are fixedly provided on both sides of the bottom plate 3, and mounting holes 321 are opened on the side panels 32. The bottom plate 3 can be fixed on the belt pressure working machine through bolts and the mounting holes 321 on the two side panels 32.

[0026] Reference Figure 2 A first crimping groove 106 communicating with the center hole 101 is provided at the top of the box body 1, and a first sealing ring 107 is provided in the first crimping groove 106. A second crimping groove 108 communicating with the center hole 101 is provided at the bottom end of the box body 1, and a second sealing ring 109 is provided in the second crimping groove 108. Both the first sealing ring 107 and the second sealing ring 109 are made of elastic materials, such as silicone or rubber.

[0027] Reference Figure 2 and Figure 3 A plurality of cavities 110 are arranged inside the first sealing ring 107 and the second sealing ring 109, and each cavity 110 is filled with a rubber elastic ball 111; by arranging a plurality of cavities 110 inside the first sealing ring 107 and the second sealing ring 109, and arranging a rubber elastic ball 111 in each cavity 110, when the first sealing ring 107 or the second sealing ring 109 is squeezed, the rubber elastic ball 111 will be squeezed and moved, thereby ensuring that the first sealing ring 107 and the second sealing ring 109 have better ductility while ensuring that the first sealing ring 107 and the second sealing ring 109 still have good sealing performance and can maintain a good sealing effect under different pressure conditions.

[0028] Reference Figure 2 and Figure 3A first crimping ring 22 is fixedly provided at the bottom end of the pressure cover 2, the first crimping ring 22 is adapted to the first crimping groove 106, and is used to extrude the first sealing pressure ring 107, and a second crimping ring 33 is fixedly provided at the top end of the bottom plate 3, the second crimping ring 33 is adapted to the second crimping groove 108, and is used to extrude the second sealing pressure ring 109; when the pressure cover 2 is installed and fixed, the first crimping ring 22 is inserted into the first crimping groove 106 at the top of the box body 1 to facilitate positioning of the pressure cover 2, and as the pressure cover 2 is pressed and fixed, the first sealing pressure ring 107 is squeezed by the first crimping ring 22, so that the first sealing pressure ring 107 is deformed and abuts against the side wall of the drill pipe, thereby effectively closing the gap between the drill pipe and the box body 1. When the base plate 3 is installed and fixed, the second crimping ring 33 is inserted into the second crimping groove 108 at the bottom of the box body 1 to locate the position of the base plate 3. As the base plate 3 is installed and fixed, the second crimping ring 33 squeezes the second sealing ring 109 to deform the second sealing ring 109 and press against the side wall of the connecting end on the drilling tool, thereby effectively closing the gap between the drilling tool and the box body 1.

[0029] Reference Figure 2 and Figure 3 In order to prevent the first sealing ring 107 and the second sealing ring 109 from being torn and damaged due to extrusion and to extend the service life of the first sealing ring 107 and the second sealing ring 109, an arc convex surface is provided at one end of the first crimping ring 22 away from the pressure cover 2 and at one end of the second crimping ring 33 away from the bottom plate 3.

[0030] Reference Figure 3 and Figure 4 An adjusting ring 112 is slidably arranged in the first crimping groove 106, the inner side wall of the adjusting ring 112 is inclined, and the inner diameter of the adjusting ring 112 gradually increases in the direction away from the bottom wall of the first crimping groove 106, the adjusting ring 112 is arranged between the first sealing pressure ring 107 and the bottom wall of the first crimping groove 106, and an elastic member for driving the adjusting ring 112 to slide in the direction close to the first sealing pressure ring 107 is arranged in the first crimping groove 106, the elastic member includes an elastic steel ring 113, in the embodiment of the present application, the elastic steel ring 113 is arranged in a wavy shape, and one end of the elastic steel ring 113 abuts against the bottom wall of the first crimping groove 106, and the other end of the elastic steel ring 113 abuts against the adjusting ring 112; in other application embodiments, the elastic member can also be a spring; the design of the adjusting ring 112 enables the first sealing pressure ring 107 to automatically adjust its position when under pressure to maintain the best sealing state, and the design of the elastic steel ring 113 increases the elasticity of the adjusting ring 112, so that it can maintain a stable sealing effect under different pressure conditions. Furthermore, by tilting the inner side wall of the adjusting ring 112 , the deformation direction of the first sealing pressure ring 107 is guided, thereby further improving the sealing performance of the gap between the drill rod and the box body 1 .

[0031] Reference Figure 2 and Figure 3 The side walls of the first crimping groove 106 are provided with a plurality of slide grooves 114. In the embodiment of the present application, two first crimping grooves 106 are provided and are symmetrically arranged on both sides of the box body 1. In other application embodiments, any number of slide grooves 114 can be provided and are evenly spaced along the circumference of the box body 1. A top block 115 is slidably arranged in each slide groove 114, and a guide block is fixedly arranged on the top block 115. A guide groove for sliding the slider is provided on the side walls of the slide groove 114, and an arc-shaped chamfer is arranged on the edge position of the slide groove 114.

[0032] Reference Figure 3 The box body 1 is provided with a driving structure for driving each top block 115 to slide in a direction approaching each other. The driving structure includes a driving ring 116 and a top rod 117. A receiving chamber 118 connected with each slide groove 114 is provided in the box body 1. The driving ring 116 is slidably arranged in the receiving chamber 118. The inner side wall of the driving ring 116 is inclined. The end faces of each top block 115 that are away from each other are provided with guiding inclined surfaces, and the guiding inclined surfaces on each top block 115 abut against the inner side wall of the driving ring 116. Specifically, in order to facilitate the installation of the driving ring 116 and the top block 115, a mounting groove 119 connected with the receiving chamber 118 and each slide groove 114 is opened at the top of the box body 1. A disk cover 120 is fixed in the mounting groove 119 by bolts. The top rod 117 is fixedly arranged on the driving ring 116, and the length direction of the top rod 117 is vertical. The top rod 117 is slidably penetrated on the disk cover 120.

[0033] When the pressure cover 2 is installed, the pressure cover 2 abuts against the push rod 117, and as the pressure cover 2 is installed, the driving ring 116 is moved by the push rod 117, and under the guidance of the inclined inner wall of the driving ring 116 and the guiding inclined surfaces on each push block 115, each push block 115 is driven to approach each other, applying a certain lateral extrusion force to the first sealing pressure ring 107, so that the first sealing pressure ring 107 is deformed toward the middle, thereby effectively enhancing the sealing performance of the first sealing pressure ring 107 and its sealing reliability, ensuring that it can still maintain a good sealing effect under high pressure environment.

[0034] The implementation principle of a mud blowout preventer box for pressurized working equipment in the embodiment of the present application is as follows: a first sealing pressure ring 107 and a second sealing pressure ring 109 are respectively arranged at the top and bottom ends of the box body 1, and these sealing pressure rings are made of elastic material. When the pressure cover 2 is installed and fixed, the first sealing pressure ring 107 is squeezed by the first crimping ring 22. The first sealing pressure ring 107 can abut against the side wall of the drill pipe under the squeezing of the first crimping ring 22, and effectively close the gap between the drill pipe and the box body 1. When the bottom plate 3 is installed and fixed, the second sealing pressure ring 109 is squeezed by the second crimping ring 33. The second sealing pressure ring 109 can abut against the side wall of the drill tool under the squeezing of the second crimping ring 33, and effectively close the gap between the drill tool and the box body 1, to ensure that the mud does not leak. At the same time, a discharge port 102 is provided on the side wall of the box body 1. When the drill rod is removed from the drilling tool, all the mud in the drilling tool is sprayed into the box body 1, and the mud in the box body 1 is smoothly discharged to the mud storage through the discharge port 102, thereby effectively preventing a large amount of mud from spraying out and causing contamination of the drilling platform and surrounding tools.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mud blowout preventer box for pressure working equipment, characterized in that: The invention comprises a box body (1), a pressure cover (2) and a bottom plate (3); the box body (1) is provided with a central hole (101) for a drilling tool to pass through; the side wall of the box body (1) is provided with a discharge port (102); the top end of the box body (1) is provided with a first sealing pressure ring (107); the bottom end of the box body (1) is provided with a second sealing pressure ring (109); the first sealing pressure ring (107) and the second sealing pressure ring (109) are both made of elastic material; the pressure cover (2) is installed The pressure cover (2) is provided with a first through hole (21) for connecting to the center hole (101) and is used to extrude a first sealing pressure ring (107). The bottom plate (3) is installed at the bottom of the box body (1) and is used to extrude a second sealing pressure ring (109). The bottom plate (3) is provided with a second through hole (31) for connecting to the center hole (101). The box body (1) is provided with fixing structures for fixing the pressure cover (2) and the bottom plate (3).

2. The mud blowout preventer box for pressure working equipment according to claim 1, characterized in that: The top end of the box body (1) is provided with a first crimping groove (106) connected to the central hole (101), the first sealing pressure ring (107) is arranged in the first crimping groove (106), and the bottom end of the pressure cover (2) is fixedly provided with a first crimping ring (22), and the first crimping ring (22) is adapted to the first crimping groove (106); The bottom end of the box body (1) is provided with a second crimping groove (108) connected to the central hole (101), the second sealing pressure ring (109) is arranged in the second crimping groove (108), and the top end of the bottom plate (3) is fixedly provided with a second crimping ring (33), and the second crimping ring (33) is adapted to the second crimping groove (108).

3. The mud blowout preventer box for pressure working equipment according to claim 2, characterized in that: An end of the first crimping ring (22) away from the pressure cover (2) and an end of the second crimping ring (33) away from the bottom plate (3) are both provided with an arc convex surface.

4. The mud blowout preventer box for pressure working equipment according to claim 2, characterized in that: A plurality of cavities (110) are arranged inside the first sealing pressure ring (107) and the second sealing pressure ring (109), and each cavity (110) is filled with a rubber elastic ball (111).

5. The mud blowout preventer box for pressure working equipment according to claim 2, characterized in that: The side walls of the first crimping groove (106) are provided with a plurality of slide grooves (114), a top block (115) is slidably arranged in each of the slide grooves (114), and a driving structure for driving each of the top blocks (115) to slide in a direction approaching each other is arranged on the box body (1).

6. The mud blowout preventer box for pressure working equipment according to claim 5, characterized in that: The driving structure comprises a driving ring (116) and a push rod (117); a receiving cavity (118) communicating with each of the sliding grooves (114) is provided in the box body (1); the driving ring (116) is slidably arranged in the receiving cavity (118); the inner side wall of the driving ring (116) is inclined; the end faces of each of the push blocks (115) which are away from each other are provided with guiding inclined surfaces, and the guiding inclined surfaces on each of the push blocks (115) abut against the inner side wall of the driving ring (116); the push rod (117) is fixedly arranged on the driving ring (116) and is used to abut against the pressure cover (2).

7. The mud blowout preventer box for pressure working equipment according to claim 5, characterized in that: An adjustment ring (112) is slidably arranged in the first crimping groove (106); the adjustment ring (112) is arranged between the first sealing pressure ring (107) and the bottom wall of the first crimping groove (106); and an elastic member is arranged in the first crimping groove (106) for driving the adjustment ring (112) to slide in a direction close to the first sealing pressure ring (107).

8. The mud blowout preventer box for pressure working equipment according to claim 7, characterized in that: The elastic member comprises an elastic steel ring (113), the elastic steel ring (113) is arranged in a wave shape, one end of the elastic steel ring (113) abuts against the bottom wall of the first crimping groove (106), and the other end of the elastic steel ring (113) abuts against the adjustment ring (112).

9. The mud blowout preventer box for pressure working equipment according to claim 7, characterized in that: The inner side wall of the adjustment ring (112) is arranged obliquely, and the inner diameter of the adjustment ring (112) gradually increases in a direction away from the bottom wall of the first crimping groove (106).

10. The mud blowout preventer box for pressure working equipment according to claim 1, characterized in that: The fixing structure comprises a threaded barrel (103) and a clamping bolt (104); the threaded barrel (103) is provided with a plurality of side walls respectively fixed at the top or bottom position of the box body (1); the clamping bolt (104) is matched with the threaded barrel (103); and the pressure cover (2) and the bottom plate (3) are both provided with a plurality of connection holes for the clamping bolt (104) to pass through.

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