Well cementation and cement discharging pipeline joint

Abstract

The utility model relates to the technical field of pipe joints, in particular to a well cementation cement discharging pipeline joint. A well cementation cement discharging pipeline connector comprises a clamping head and a clamping sleeve, the clamping sleeve comprises a sleeve body, clamping lugs extending axially are arranged on the peripheral face of one end of the sleeve body, the number of the clamping lugs is two or more, the clamping lugs are evenly distributed in the circumferential direction, locking grooves are formed in the inner side faces of the clamping lugs, the locking grooves extend in the circumferential direction and penetrate through the two circumferential ends of the clamping lugs, and the locking grooves are wedge-shaped grooves in the circumferential extending direction of the locking grooves. The clamping head comprises a tubular base body, one end of the tubular base body is used for abutting against the end of the clamping sleeve, clamping strips extending in the circumferential direction are arranged on the outer circumferential face of the tubular base body, the clamping strips are wedge-shaped in the extending direction and matched with the locking grooves, the number of the clamping strips corresponds to the number of the clamping lugs, and after the clamping sleeve and the clamping head abut against each other and rotate relatively, the clamping lugs are matched with the locking grooves. And the clamping strip is screwed into the locking groove of the clamping lug until the clamping strip and the locking groove are wedged tightly, so that the clamping head and the clamping sleeve are locked and connected. And the quick connection of the well cementation and cement discharging pipeline joint is realized, and the quick connection device is better applicable to the field of pipe joints.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe joints, in particular to a downhole cement pipeline joint. Background Art

[0002] During cementing construction, cement needs to be transported from the equipment storing cement to the cementing pump truck. The pipeline for transporting cement from the ash transport truck or large ash storage tank and other storage equipment to the cementing pump truck is the downhole cement pipeline. After the cement is transported to the cementing pump truck, it is pumped into the oil well after being mixed and stirred with water to start the cementing operation.

[0003] During cementing construction, the downhole cement pipeline is connected between the cementing pump truck and the ash transport truck or large ash storage tank, and a connecting joint is required for the connection. Most of the current connection methods of the downhole cement pipeline are through fine-threaded joints or snap-fastening clip joints. When downhole cementing, there is a lot of dust. After long-term use, the fine threads are prone to sticking to hard cement lumps, which are not easy to remove. The fine threads are easily worn and damaged, resulting in poor sealing effect and short service life. During cementing construction, the cementing pump truck shakes violently. The snap-fastening clip joint is a snap-fastening connection. During the shaking process, the clip is prone to loosening and falling off, and the clip rod on the joint of the snap-fastening clip joint is prone to deformation, and the connection firmness is not good, resulting in poor sealing effect and short service life. Content of the Utility Model

[0004] The purpose of the utility model is to provide a downhole cement pipeline joint, which is used to solve the problems of poor sealing effect and short service life of the existing connection joints of the downhole cement pipeline.

[0005] The downhole cement pipeline joint of the utility model adopts the following technical scheme: A downhole cement pipeline joint includes a chuck and a socket. The socket includes a sleeve body. Axially extending lugs are provided on the outer peripheral surface of one end of the sleeve body. There are more than two lugs and they are circumferentially distributed. A locking groove is provided on the inner side surface of the lug. The locking groove extends circumferentially and penetrates both circumferential ends of the lug. The locking groove is a wedge-shaped groove in its circumferential extension direction. The chuck includes a tubular base body. One end of the tubular base body is used to abut against the end of the socket. A circumferentially extending strip is provided on the outer peripheral surface of the tubular base body. The strip is wedge-shaped in its extending direction and is adapted to the locking groove. The number of the strips corresponds to the number of the lugs. After the socket and the chuck are abutted and rotated relative to each other, the strip is screwed into the locking groove of the lug until the strip and the locking groove are wedged tightly, thereby realizing the locking connection between the chuck and the socket.

[0006] The downhole ash pipeline joint of the present utility model is a new type of downhole ash pipeline joint. When the downhole ash pipeline joint of the present utility model is in use, the ferrule is fixedly connected to the ash port, the chuck is connected to the downhole ash pipeline. The ferrule is provided with axially protruding lugs, and the chuck is correspondingly provided with circumferentially extending strips. The locking groove on the inner side surface of the lug and the strip are wedge-shaped with a shape adaptation. The ferrule and the chuck are butted and rotated, and the strip is screwed into the locking groove of the lug, and rotated until the strip and the locking groove are wedged tightly, ensuring the locking connection between the chuck and the ferrule. The operation is simple and the sealing effect is good.

[0007] Further, the side surface of the strip near one end of the ferrule is a plane, and the side surface of the strip far from the ferrule is a slope and gradually thickens in the circumferential extension direction, forming the wedge shape. The side surface of the strip near one end of the ferrule being a plane makes the structure compact when fitting with the ferrule, and the fitting is sealed. The side surface of the strip far from the ferrule being a slope and gradually thickening in the circumferential extension direction continuously fits during the locking process to ensure sealing, and this setting is simple to manufacture and has a better locking effect.

[0008] Further, the outer peripheral surface of the tubular base is provided with knocking bumps. After the strip and the locking groove are cooperatively locked, knocking the knocking bumps along the locking direction makes the strip and the locking groove fit more tightly for better sealing. When disassembly is required, knocking the knocking bumps in the reverse direction makes the strip and the locking groove loosen. It is convenient to use and simple to disassemble, ensuring a better sealing effect when locked.

[0009] Further, the knocking bump is located at the end of the wedging end of the strip, and there is an avoidance opening for avoiding the lug between adjacent strips. The knocking bump being located at the end of the wedging end of the strip is along the locking direction when applying knocking force, making the operation more labor-saving. The avoidance opening for avoiding the lug between adjacent strips does not affect the locking process and is convenient to use.

[0010] Further, the chuck further includes a connecting sleeve, and the connecting sleeve is inserted into the inner hole of the chuck. The chuck and the connecting sleeve are axially blocked and cooperate to press and connect the connecting sleeve and the ferrule. The setting of the connecting sleeve facilitates the connection with the downhole ash pipeline. The axial blocking cooperation between the chuck and the connecting sleeve and pressing and connecting the connecting sleeve and the ferrule ensure that the fitting part between the chuck and the ferrule is more sealed after locking.

[0011] Further, one end of the connecting sleeve is pressed and butted against the end surface of the ferrule, and a sealing structure is provided between the two. The sealing structure ensures a better locking effect and better sealing performance when the connecting sleeve and the ferrule are pressed and connected.

[0012] Further, the end of the connecting sleeve butted against the ferrule is provided with a sealing installation groove, and a sealing ring is arranged in the installation groove. The sealing installation groove and the sealing ring constitute the sealing structure. The sealing installation groove facilitates the installation of the sealing ring and ensures that the sealing ring will not shift during the sealing fit, affecting the sealing effect.

[0013] Further, the cross-section of the sealing ring is in a T-shaped structure. The part corresponding to the vertical side of the T shape is arranged in the sealing installation groove, and the part corresponding to the horizontal side of the T shape covers the edge of the sealing installation groove and is pressed against the end face of the chuck. The upper end of the T-shaped structure has a large area, and the contact area with the ferrule is large, ensuring a better sealing effect.

[0014] Further, there are two clamping ears, symmetrically distributed along the outer circumference of the sleeve body, and two clamping bars are correspondingly arranged with the clamping ears. Being set to two makes the force evenly distributed during use, convenient to use, and has a better locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic structural diagram of the first embodiment of the downhole ash pipeline joint of the present utility model;

[0016] Figure 2 is Figure 1 a schematic structural diagram of the ferrule in

[0017] Figure 3 is Figure 2 a side view of

[0018] Figure 4 is Figure 1 a schematic structural diagram of the tubular base of the chuck in

[0019] Figure 5 is Figure 4 a side view of

[0020] In the figure: 1, ferrule; 2, chuck; 3, connecting sleeve; 4, sealing ring; 11, ferrule connecting pipe; 12, clamping ear; 21, clamping bar; 22, knocking convex block; 23, avoiding opening; 24, tubular base; 31, sealing installation groove; 32, barbs. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0022] The first specific embodiment of the downhole ash pipeline joint of the present utility model:

[0023] The downhole ash pipeline joint of the present utility model is as shown in Figures 1-5As shown in the figure, a downhole cement injection pipeline joint includes a ferrule 1 and a socket 2. The ferrule 1 includes a sleeve body. An axially extending lug 12 is provided on the outer peripheral surface of one end of the sleeve body. A locking groove is provided on the inner side surface of the lug 12. The locking groove extends circumferentially and penetrates both circumferential ends of the lug 12. The locking groove is a wedge-shaped groove in its circumferential extension direction. The socket 2 includes a tubular base body 24. One end of the tubular base body 24 is used to abut against the end of the ferrule 1. A circumferentially extending rib 21 is provided on the outer peripheral surface of the tubular base body 24. The rib 21 is wedge-shaped in its extension direction and is adapted to the locking groove. The number of the ribs 21 and the lugs 12 is the same, both being two. After the ferrule 1 and the socket 2 are abutted and rotated relative to each other, the rib 21 is screwed into the locking groove of the lug 12 until the rib 21 and the locking groove are wedged tightly, thereby realizing the locking connection between the socket 2 and the ferrule 1.

[0024] The ferrule 1 is an integral forging, and the material is 45 steel. The ferrule 1 includes a large-diameter section and a small-diameter section. The small-diameter section is the ferrule connecting pipe 11. The ferrule connecting pipe 11 can be connected to the upper ash port of the cementing truck or the ash outlet of the ash transport vehicle and the large ash storage tank, or directly welded at that place. The lugs 12 are provided on the outer peripheral surface of the large-diameter section. There are two lugs 12, which are symmetrically distributed at the end of the large-diameter section.

[0025] The socket 2 includes a tubular base body 24, which is an integral forging, and the material is 45 steel. There are two ribs 21, which are symmetrically distributed on the outer peripheral surface of the tubular base body 24. The perimeter of each rib 21 is one-third of the outer perimeter of the tubular base body 24. The side surface of the rib 21 near the ferrule 1 is a plane, and the side surface of the rib 21 far from the ferrule 1 is a slope and gradually thickens into a slope in the circumferential extension direction, forming a wedge shape. Knocking bumps 22 are provided at the widest part of the rib 21. There are two knocking bumps 22, and there is an avoidance opening 23 for avoiding the lugs 12 between the adjacent ribs 21.

[0026] The socket 2 includes a connecting sleeve 3, which is an integral forging, and the material is 45 steel. The connecting sleeve 3 is inserted into the inner hole of the socket 2. There is a step surface on the inner hole of the socket 2 that cooperates with the connecting sleeve 3. A groove for cooperating and blocking is provided on the outer peripheral surface of the connecting sleeve 3. The socket 2 and the connecting sleeve 3 are axially blocked and cooperate to press and connect the connecting sleeve 3 and the ferrule 1. Barbs 32 are machined on the outer peripheral surface of one end of the connecting sleeve 3 extending out of the inner hole of the socket 2, which is convenient for installing and fixing the downhole ash soft pipeline. A T-shaped sealing installation groove 31 is provided at the axially blocking and cooperating position of the socket 2 and the connecting sleeve 3. The sealing ring 4 is a sealing ring 4 with a T-shaped cross-section. The part corresponding to the vertical side of the T shape is arranged in the sealing installation groove 31, and the part corresponding to the horizontal side of the T shape covers the groove edge of the sealing installation groove 31 and is pressed against the end surface of the socket 2.

[0027] In the specific implementation of the downhole ash pipeline joint of the present utility model, the connecting sleeve 3 is inserted into the inner hole of the chuck 2, and the sealing ring 4 is placed in the sealing installation groove 31 of the connecting sleeve 3. When the ferrule 1 abuts against the chuck 2, the clamping strip 21 on the chuck 2 is placed in the locking groove of the ferrule 1. After the ferrule 1 and the chuck 2 rotate relative to each other, the knocking convex block 22 on the chuck 2 is struck with a hammer. Since the shapes of the clamping strip 21 and the locking groove are both wedge-shaped, the tighter the hammer strikes, the better the locking effect between the clamping strip 21 and the locking groove, and the firmer the connection between the chuck 2 and the ferrule 1. The ferrule 1 fits with the sealing ring 4 to ensure good sealing effect.

[0028] Through the above description of the specific embodiment 1 of the downhole ash pipeline joint of the present utility model, it can be seen that the downhole ash pipeline joint of the present utility model is provided with a lug on the ferrule and a clamping strip on the chuck. Through the screwing fit between the clamping strip and the locking groove of the lug, it is ensured that the ferrule and the chuck are well matched to achieve the rapid connection of the joint.

[0029] Of course, the downhole ash pipeline joint of the present utility model is not limited to the above embodiment. The following also lists several other implementation manners of the downhole ash pipeline joint based on the design concept of the present utility model.

[0030] For example, in other implementation manners, different from the above embodiment 1, both side surfaces of the clamping strip are slopes and gradually thicken in the circumferential extension direction, and the locking groove structure is set corresponding to the shape of the clamping strip.

[0031] For example, in other implementation manners, different from the above embodiment 1, the knocking convex block is arranged at the axial side position of the clamping strip, and the locking effect between the chuck and the ferrule is achieved by knocking the knocking convex block.

[0032] For another example, in other implementation manners, different from the above embodiment 1, the chuck includes a tubular base body. The connecting sleeve is not provided in the tubular base body. The tubular base body is provided with a sealing installation groove at one end close to the ferrule, and the sealing ring is installed in the sealing installation groove. The tubular base body is connected to the downhole ash pipeline at one end away from the ferrule.

[0033] For another example, in other implementation manners, different from the above embodiment 1, the outer peripheral surface structure of the chuck has a hexagonal section, and the knocking convex block is not provided on the chuck. The locking effect between the chuck and the ferrule is achieved by twisting the hexagonal section with a caliper.

[0034] Or in other implementation manners, different from the above embodiment 1, the butting end faces of the ferrule and the chuck are processed into sealing mating faces, and the ferrule and the chuck are sealed by fitting the sealing mating faces.

[0035] Or in other implementation manners, different from the above embodiment 1, the sealing installation groove is a semi-circular arc groove body, the sealing ring is a circular sealing ring, and the ferrule fits with the circular sealing ring when locked with the chuck to achieve sealing.

[0036] Alternatively, in other embodiments, different from the above-mentioned first embodiment, the number of clamping bars and clamping ears can also be set to three, four or more.

[0037] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present invention shall similarly be included in the protection scope of the present invention.

Claims

1. A downhole cementing pipeline joint, characterized in that The invention comprises a clamp head (2) and a clamp sleeve (1), wherein the clamp sleeve (1) comprises a sleeve body, an outer peripheral surface of one end of the sleeve body is provided with an axially extending clamp ear (12), there are more than two clamp ears (12) and they are evenly distributed in the circumferential direction, the inner side surface of the clamp ear (12) is provided with a locking groove, the locking groove extends in the circumferential direction and passes through the two circumferential ends of the clamp ear (12), and the locking groove is a wedge-shaped groove in the circumferential extension direction, the clamp head (2) comprises a tubular base body (24), one end of the tubular base body (24) is used to engage with the clamp The ends of the sleeve (1) are in contact with each other, and the outer peripheral surface of the tubular base (24) is provided with a circumferentially extending clamping strip (21), the clamping strip (21) is wedge-shaped in its extending direction and is adapted to the locking groove, and the number of the clamping strip (21) corresponds to the number of the clamping ears (12). After the clamping sleeve (1) and the clamping head (2) are in contact and rotated relatively, the clamping strip (21) is screwed into the locking groove of the clamping ear (12) until the clamping strip (21) and the locking groove are wedged, thereby realizing a locking connection between the clamping head (2) and the sleeve (1).

2. The downhole cementing pipeline joint according to claim 1, characterized in that, The side surface of the clamping strip (21) at one end close to the clamping sleeve (1) is a plane, and the side surface at the end away from the clamping sleeve (1) is a sloped surface and gradually thickens in the circumferential extension direction to form the wedge shape.

3. The downhole cement injection pipeline joint according to claim 2, characterized in that, The outer peripheral surface of the tubular base (24) is provided with a knocking protrusion (22).

4. The downhole cement injection pipeline joint according to claim 3, characterized in that, The knocking protrusion (22) is located at the end of the wedging end of the clamping strip (21), and has an avoidance opening (23) between the adjacent clamping strip (21) for avoiding the clamping ear (12).

5. The joint of the downhole cementing pipeline according to claim 1, characterized in that, The clamp (2) also includes a connecting sleeve (3), which is inserted into the inner hole of the clamp (2), and the clamp (2) and the connecting sleeve (3) are axially stop-matched and the connecting sleeve (3) and the clamp (1) are pressed and connected.

6. The downhole cementing pipeline joint according to claim 5, characterized in that, One end of the connecting sleeve (3) is pressed and butted against the end surface of the ferrule (1), and a sealing structure is provided between the two.

7. The downhole cement injection pipeline joint according to claim 6, characterized in that, A sealing installation groove (31) is provided at one end of the connecting sleeve (3) that is butt-jointed with the ferrule (1), a sealing ring (4) is provided in the sealing installation groove (31), and the sealing installation groove (31) and the sealing ring (4) constitute the sealing structure.

8. The downhole cementing pipeline joint according to claim 7, characterized in that, The cross section of the sealing ring (4) is T-shaped, the portion corresponding to the vertical side of the T is arranged in the sealing installation groove (31), and the portion corresponding to the horizontal side of the T covers the groove edge of the sealing installation groove (31) and is pressed tightly against the end face of the clamp (2).

9. The downhole cementing pipeline joint according to any one of claims 1-8, characterized in that, There are two clamping ears (12) symmetrically distributed along the outer peripheral surface of the sleeve body, and there are two clamping strips (21) arranged corresponding to the clamping ears (12).

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