A high-pressure manifold oil and gas casing head

Abstract

The present invention relates to a casing head, specifically, to a high-pressure manifold oil and gas casing head. It includes a fixing part and a fastening device. The present invention applies thrust to the outer side of each arc block through a funnel ring, drives each arc block to be close to each other, makes the inner side of each arc block fit to the outer side of the high-pressure pipe near the wellhead, improves the connection stability between the funnel ring and the outer side of the high-pressure pipe, avoids the high pressure generated during the oil output of the high-pressure pipe, causes a gap to be generated between the funnel ring and the high-pressure pipe, and causes oil to leak through the gap. At the same time, when the funnel ring moves downward, it drives each limit assembly to move downward. When the bottom end of the bottom block contacts the ground, the funnel ring stops rotating, and each bottom block is close to the bottom surface to support the entire fastening device, the fixing part and the two high-pressure pipes. The height of the entire fastening device is adjusted by rotating the funnel ring, thereby adapting to the connection work of high-pressure pipes of different heights, improving the adaptability of the entire device, and eliminating the need to achieve fixing work by connecting multiple casing heads.

Description

Technical Field

[0001] The invention relates to a casing head, in particular to a high-pressure manifold oil and gas casing head. Background Art

[0002] During drilling operations and oil and gas testing, a safe and reliable wellhead device must be installed to effectively control well operations and production. The casing head is the basic part of the wellhead device and is installed on the casing string. The upper end is used to suspend the casing strings, seal the annular space between the casing layers, and provide standard connections for other well control equipment such as the blowout preventer stack and gas tree. It also provides an access interface to the casing annulus for various special operations. It is a permanent oil and gas wellhead device.

[0003] Due to different drilling depths, the height reserved to the wellhead will also be different during the laying of the wellhead pipeline. The existing oil and gas casing heads are of a certain size. When the height cannot match the pipeline, it is necessary to adapt the pipeline by splicing the casing heads. Although it can be close to the ground, the fastening position will change accordingly, and gaps are likely to appear, resulting in oil or oil and gas leakage. Therefore, a high-pressure manifold oil and gas casing head is urgently needed. Summary of the Invention

[0004] The object of the present invention is to provide a high-pressure manifold oil and gas casing head to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, a high-pressure manifold oil and gas casing head is provided, comprising a fixing part, the fixing part comprising a connecting head, a sleeve being provided at the bottom of the connecting head, an integral cavity being formed between the inner end of the connecting head and the inner end of the sleeve, a plurality of arc blocks being provided at the edge position of the bottom end of the sleeve, each of the arc blocks being arranged in an array at the bottom end of the arc block, a fastening device being provided on the outside of the arc block, the fastening device comprising a funnel ring, a fastening ring being provided at the top of the funnel ring, an internal thread being provided on the inner side of the fastening ring, and an external thread being provided on the outer side of each of the arc blocks, the fastening ring being threadedly connected to the arc block, the fastening ring moving downward from top to bottom along the outer threads of each of the arc blocks, driving each of the arc blocks to be tightly attached to each other, a plurality of inward tilting blocks being provided at the bottom end of the funnel ring, a plurality of limiting assemblies being provided at the bottom end of the funnel ring, the limiting assembly comprising a bottom block, a connecting block being provided at the top of the bottom block, and the top of the connecting block being connected to the bottom end of the funnel ring.

[0006] As a further improvement of the present technical solution, a plurality of handles are provided on the outside of the funnel ring. The handles are U-shaped and are distributed in an array on the outside of the funnel ring.

[0007] As a further improvement of the present technical solution, the handle is kept parallel to the side surface of the funnel ring, and a certain gap is reserved between the handle and the side surface of the funnel ring.

[0008] As a further improvement of the present technical solution, side blocks are provided on both sides of the bottom block, the side blocks are wedge-shaped, and the height of the side block away from the bottom block is smaller than the height of the other side.

[0009] As a further improvement of the present technical solution, a screw hole is provided at the top end of the side surface of the side block, and a screw rod is threadedly connected to the top end of the screw hole.

[0010] As a further improvement of this technical solution, an inner bucket is provided on the inside of the screw hole, the cross-sectional size of the top end of the inner bucket is larger than the cross-sectional size of the bottom end of the inner bucket, and the cross-sectional size of the top end of the inner bucket is consistent with the cross-sectional size of the screw, and an expansion port is provided at the bottom end of the inner bucket.

[0011] As a further improvement of the present technical solution, limit springs are provided on both sides of the top of the connecting block, a plurality of limit grooves are provided at the bottom end of the funnel ring, and the top ends of the two limit springs are connected to the inner top walls of the limit grooves.

[0012] As a further improvement of the present technical solution, a plurality of balls are provided at the bottom end of the bottom block, and the balls are in rolling connection with the bottom end of the bottom block.

[0013] As a further improvement of the present technical solution, a protective ring is provided at the top of the funnel ring. The protective ring is located outside each of the arc blocks, and a certain gap is formed between the inner side of the protective ring and the outer side of the arc block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the high-pressure manifold oil and gas casing head, a thrust is applied to the outer sides of each arc block through the funnel ring, driving each arc block to fit closely to each other, so that the inner sides of each arc block fit closely to the outer side of the high-pressure pipe near the wellhead, thereby improving the connection stability between the funnel ring and the outer side of the high-pressure pipe, avoiding the high pressure generated during the oil discharge of the high-pressure pipe, causing a gap to form between the funnel ring and the high-pressure pipe, resulting in oil leakage through the gap. At the same time, when the funnel ring moves downward, it will drive each limit assembly to move downward. When the bottom end of the bottom block contacts the ground, the funnel ring stops rotating, and each bottom block fits closely to the bottom surface to support the entire fastening device, the fixing parts and the two high-pressure pipes. The height of the entire fastening device is adjusted by rotating the funnel ring, thereby adapting to the connection work of high-pressure pipes at different heights, improving the adaptability of the entire device, and eliminating the need to achieve fixing work by connecting multiple casing heads.

[0016] 2. In the high-pressure manifold oil and gas casing head, a handle is provided to provide the operator with a force application point. The operator can hold the handle to indirectly drive the funnel ring to move, thereby avoiding slipping and improving the movement efficiency of the funnel ring.

[0017] 3. In the high-pressure manifold oil and gas casing head, protrusions are promptly removed by the provided side blocks. When the side blocks contact the protrusions away from the bottom block, due to the wedge-shaped structure of the side blocks, the pressure exerted on the protrusions during the contact process is greater than the pressure exerted on the protrusions by the side of the bottom block. The operator only needs to apply a small amount of thrust to remove the protrusions, thereby improving the movement efficiency of the bottom block and reducing the force applied by the operator.

[0018] 4. In the high-pressure manifold oil and gas casing head, the bottom block is provided to reduce the contact area between the bottom end of the bottom block and the ground. The contact area is proportional to the friction resistance. Reducing the contact area means reducing the friction resistance, improving the movement efficiency of the bottom block and reducing the occurrence of jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a diagram showing the overall structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the fixing structure of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the fastening device of the present invention;

[0023] Figure 5 This is a schematic diagram of the funnel ring structure of the present invention;

[0024] Figure 6 For the present invention Figure 5 A local enlarged view of point A;

[0025] Figure 7 This is a disassembled cross-sectional view of the position limiting component structure of the present invention;

[0026] Figure 8 For the present invention Figure 7 A partial enlarged view of point B.

[0027] The meaning of each number in the figure is:

[0028] 10. Fixing piece; 110. Connector; 120. Sleeve; 130. Arc block;

[0029] 20. Fastening device; 210. Funnel ring; 211. Fastening ring; 212. Handle; 213. Inward tilting block; 214. Limiting groove; 220. Limiting assembly; 221. Bottom block; 222. Side block; 2221. Screw hole; 2222. Inner bucket; 223. Screw; 224. Connecting block; 225. Limiting spring; 226. Ball; 230. Protective ring. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-8 As shown, a high-pressure manifold oil and gas casing head is provided, including a fixing member 10, the fixing member 10 includes a connector 110, a sleeve 120 is provided at the bottom end of the connector 110, an integral cavity is formed between the inner end of the connector 110 and the inner end of the sleeve 120, a plurality of arc blocks 130 are provided at the edge of the bottom end of the sleeve 120, each arc block 130 is arranged in an array at the bottom end of the arc block 130, a fastening device 20 is provided on the outside of the arc block 130, the fastening device 20 includes a funnel ring 210, a fastening ring 211 is provided at the top of the funnel ring 210, and the fastening ring 211 is provided at the top end of the funnel ring 210. 11 is provided with an internal thread on the inside, and each arc block 130 is provided with an external thread on the outside. The fastening ring 211 maintains a threaded connection with the arc block 130. The fastening ring 211 moves downward from top to bottom along the outer thread of each arc block 130, driving each arc block 130 to be close to each other. The bottom end of the funnel ring 210 is provided with a plurality of inward tilting blocks 213, and the bottom end of the funnel ring 210 is provided with a plurality of limiting components 220. The limiting component 220 includes a bottom block 221, and the top of the bottom block 221 is provided with a connecting block 224. The top of the connecting block 224 is connected to the bottom end of the funnel ring 210.

[0032] When in use, the entire device is inserted from top to bottom into the outside of the high-pressure pipe being spliced, and the sliding sleeve 120 is moved to the splicing position of the two high-pressure pipes. The two high-pressure pipes are tightened by the sleeve 120, and then the funnel ring 210 is slowly rotated from top to bottom. The funnel ring 210 moves down along the outer threads of each arc block 130. During the rotation of the funnel ring 210, a thrust is applied to the outer sides of each arc block 130, driving each arc block 130 to fit closely to each other, so that the inner sides of each arc block 130 fit the outer side of the high-pressure pipe near the wellhead, thereby improving the connection stability between the funnel ring 210 and the outer side of the high-pressure pipe and avoiding the oil discharge process of the high-pressure pipe. The high pressure generated in the funnel causes a gap to form between the funnel ring 210 and the high-pressure pipe, causing oil to leak through the gap. At the same time, when the funnel ring 210 moves downward, it will drive each limit assembly 220 to move downward. When the bottom end of the bottom block 221 contacts the ground, the funnel ring 210 stops rotating. Through the close contact between each bottom block 221 and the bottom surface, the entire fastening device 20, the fixing part 10 and the two high-pressure pipes are supported. By rotating the funnel ring 210, the height of the entire fastening device 20 can be adjusted to adapt to the connection work of high-pressure pipes at different heights, thereby improving the adaptability of the entire device and eliminating the need to achieve fixing work by connecting multiple casing heads.

[0033] In addition, a plurality of handles 212 are provided on the outside of the funnel ring 210. The handles 212 are U-shaped and arranged in an array on the outside of the funnel ring 210. The operator can grasp the handles 212 to indirectly move the funnel ring 210, thereby preventing slippage and improving the movement efficiency of the funnel ring 210.

[0034] Furthermore, the handle 212 is parallel to the side of the funnel ring 210, and a certain gap is reserved between the handle 212 and the side of the funnel ring 210. After the operator grasps the handle 212, the operator's hand remains perpendicular to the side of the funnel ring 210, which improves the force application effect and reduces the operator's force.

[0035] The bottom block 221 is provided with side blocks 222 on both sides of the bottom block 221, and the side blocks 222 are wedge-shaped. The height of the side blocks 222 away from the bottom block 221 is less than the height of the other side. The side blocks 222 are provided to timely remove the protrusions. When the side blocks 222 away from the bottom block 221 come into contact with the protrusions, due to the wedge-shaped structure of the side blocks 222, the pressure applied to the protrusions during the contact process is greater than the pressure applied to the protrusions by the sides of the bottom block 221. The operator only needs to apply a small amount of thrust to remove the protrusions, thereby improving the moving efficiency of the bottom block 221 and reducing the force applied by the operator.

[0036] Specifically, a screw hole 2221 is formed at the top end of the side of the side block 222, and a screw rod 223 is threadedly connected to the top end of the screw hole 2221. When the bottom block 221 is completely in contact with the ground, the screw rod 223 is rotated so that the screw rod 223 is threaded into the inner end of the screw hole 2221 and then passes through the screw hole 2221 into the ground, thereby fixing the side block 222 to the ground, thereby maintaining the contact position of the bottom block 221 with the ground and further improving the supporting stability of the bottom block 221.

[0037] In addition, an inner bucket 2222 is provided on the inside of the screw hole 2221. The cross-sectional size of the top end of the inner bucket 2222 is larger than the cross-sectional size of the bottom end of the inner bucket 2222. The cross-sectional size of the top end of the inner bucket 2222 is consistent with the cross-sectional size of the screw 223. An expansion port is provided at the bottom end of the inner bucket 2222. When in use, as the bottom block 221 moves down and fits the ground, the screw rod 223 is separated from the inner end of the screw hole 2221. At this time, the upper and lower ends of the screw hole 2221 are in an open state. When the side block 222 contacts the ground, dust is easily generated. The dust will penetrate into the inner end of the screw hole 2221 along the bottom end of the screw hole 2221 and adhere to the inner wall of the screw hole 2221. When the position of the bottom block 221 is determined, the screw rod 223 needs to be threaded into the inner end of the screw hole 2221. However, due to the dust adhering to the inner wall of the screw hole 2221, the sizes of the two cannot be adapted, and the screw rod 223 is difficult to be rotated into the inner end of the screw hole 2221. At this time, the inner end of the screw hole 2221 is prevented from being screwed by the inner bucket 2222 provided. The expansion opening at the bottom of the inner bucket 2222 is made of rubber material, which has strong elasticity and good plasticity. When the inner bucket 2222 is not acted upon by external force, the expansion opening at the bottom of the inner bucket 2222 shrinks inward, so that the bottom of the inner bucket 2222 is in a sealed state. Dust entering the inner end of the screw hole 2221 will be blocked by the tightened inner bucket 2222 and cannot adhere to the inner wall of the screw hole 2221. When the screw rod 223 is inserted into the inner end of the screw hole 2221, it will extend into the inner end of the inner bucket 2222 along the inner end of the screw hole 2221. The bottom end of the screw rod 223 will open the expansion opening, so that the screw rod 223 can smoothly pass through the screw hole 2221 and extend into the ground, thereby completing the fixation of the side block 222.

[0038] Furthermore, limit springs 225 are provided on both sides of the top of the connecting block 224. A plurality of limit slots 214 are provided at the bottom of the funnel ring 210. The top ends of the two limit springs 225 are connected to the inner top walls of the limit slots 214. When the bottom end of the funnel ring 210 contacts the ground, the gravity generated by the funnel ring 210 directly acts on the ground. Since the force is mutual, the ground provides a reverse force to the funnel ring 210, causing the funnel ring 210 to move upward. The reaction force is then transmitted to the connecting block 224 through the funnel ring 210, forcing the connecting block 224 to extend upward into the inner ends of the limit slots 214, squeezing the limit springs 225. The limit springs 225 contract upward to neutralize the reaction force, thus providing a buffering effect on the bottom block 221, reducing the pressure generated by the bottom block 221 upon contact with the ground, and further improving the support stability of the bottom block 221.

[0039] Furthermore, a plurality of balls 226 are provided at the bottom of the bottom block 221, and the balls 226 maintain a rolling connection with the bottom of the bottom block 221. When the bottom block 221 contacts the ground, frictional resistance is generated at the contact point between the bottom of the bottom block 221 and the ground. This frictional resistance is in the opposite direction of the rotation of the bottom block 221, hindering the movement of the bottom block 221. At this time, the bottom block 221 is provided to reduce the contact area between the bottom of the bottom block 221 and the ground. Since the contact area is proportional to the frictional resistance, reducing the contact area reduces the frictional resistance, thereby improving the movement efficiency of the bottom block 221 and reducing the occurrence of jamming.

[0040] In addition, a protective ring 230 is provided at the top of the funnel ring 210. The protective ring 230 is located outside each arc block 130, and a certain gap is formed between the inner side of the protective ring 230 and the outer side of the arc block 130. As the funnel ring 210 moves downward, it drives the protective ring 230 downward. When the funnel ring 210 moves to contact the ground, the protective ring 230 moves to the outside of the arc block 130, isolating the arc block 130 from the outside air through the protective ring 230, preventing dust in the air from adhering to the outer wall of the arc block 130, resulting in an increase in the thickness of the outer wall of the arc block 130, which would not fit the inner end of the fastening ring 211, making it impossible to restore the funnel ring 210, and affecting the subsequent disassembly work.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure manifold oil and gas casing head, comprising a fixing member (10), the fixing member (10) comprising a connector (110), a sleeve (120) being provided at the bottom end of the connector (110), an integral cavity being formed between the inner end of the connector (110) and the inner end of the sleeve (120), a plurality of arc blocks (130) being provided at the edge of the bottom end of the sleeve (120), the arc blocks (130) being arranged in an array at the bottom end of the arc blocks (130), and characterized in that: A fastening device (20) is provided on the outside of the arc block (130), and the fastening device (20) includes a funnel ring (210). A fastening ring (211) is provided on the top of the funnel ring (210), and an internal thread is provided on the inside of the fastening ring (211). Each arc block (130) is provided with an external thread on the outside. The fastening ring (211) is threadedly connected to the arc block (130). The fastening ring (211) is threadedly connected to each arc block from top to bottom. The outer thread of (130) moves downward, driving each of the arc blocks (130) to be close to each other, a plurality of inward tilting blocks (213) are provided at the bottom end of the funnel ring (210), a plurality of limiting assemblies (220) are provided at the bottom end of the funnel ring (210), the limiting assemblies (220) include a bottom block (221), a connecting block (224) is provided at the top end of the bottom block (221), and the top end of the connecting block (224) is connected to the bottom end of the funnel ring (210); Side blocks (222) are provided on both sides of the bottom block (221), the side blocks (222) are wedge-shaped, and the height of the side blocks (222) away from the bottom block (221) is less than the height of the other side; Limiting springs (225) are provided on both sides of the top of the connecting block (224), a plurality of limiting grooves (214) are provided at the bottom of the funnel ring (210), and the top ends of the two limiting springs (225) are connected to the inner top walls of the limiting grooves (214).

2. The high-pressure manifold oil and gas casing head according to claim 1, characterized in that: A plurality of handles (212) are provided on the outside of the funnel ring (210), the handles (212) are U-shaped, and the handles (212) are distributed in an array on the outside of the funnel ring (210).

3. The high-pressure manifold oil and gas casing head according to claim 2, characterized in that: The handle (212) is kept parallel to the side of the funnel ring (210), and a certain gap is reserved between the handle (212) and the side of the funnel ring (210).

4. The high-pressure oil and gas manifold casing head according to claim 1, characterized in that: A screw hole (2221) is provided at the top end of the side surface of the side block (222), and a screw rod (223) is threadedly connected to the top end of the screw hole (2221).

5. The high-pressure manifold oil and gas casing head according to claim 4, characterized in that: An inner bucket (2222) is provided inside the screw hole (2221), the cross-sectional size of the top end of the inner bucket (2222) is larger than the cross-sectional size of the bottom end of the inner bucket (2222), and the cross-sectional size of the top end of the inner bucket (2222) is consistent with the cross-sectional size of the screw rod (223), and the bottom end of the inner bucket (2222) is provided with an expansion opening.

6. The high-pressure manifold oil and gas casing head according to claim 4, characterized in that: A plurality of rolling balls (226) are provided at the bottom end of the bottom block (221), and the rolling balls (226) are in rolling connection with the bottom end of the bottom block (221).

7. The high-pressure manifold oil and gas casing head according to claim 3, characterized in that: A protective ring (230) is provided at the top of the funnel ring (210), and the protective ring (230) is located outside each of the arc blocks (130), with a certain gap formed between the inside of the protective ring (230) and the outside of the arc blocks (130).

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