CN206138831U - Can pacify drilling fluid filter unit who tears open fast - Google Patents

Abstract

The utility model relates to a drilling fluid filter screen device which can be quickly installed and disassembled, which comprises a filter screen body and a filter screen collar. There are a plurality of filter holes, the filter collar is cylindrical and has openings at both ends, and the upper end of the filter body is clipped to the lower end of the filter collar. The upper port of the filter body is connected with an outwardly folded filter flange, and the outer circumference of the filter flange is symmetrically provided with filter lugs extending radially outward; the lower port of the filter collar is provided with a The hanging lug chute corresponding to the hanging lug, the upper ends of the hanging lug chute respectively extend upward in the axial direction, and the upper ends of each hanging lug chute respectively bend to the same side of the filter circle circle; At the inner end of the ear chute. The inner end of each hanging lug chute is respectively connected with a hanging lug inlay groove. The device can reduce the number of make-up and breakout of the protection pup joint, increase the service life of the protection pup joint, and shorten the time required for cleaning the filter screen.

Description

A Drilling Fluid Screen Device That Can Be Installed and Disassembled Quickly

technical field

The utility model relates to a drilling fluid filter screen device which can be quickly installed and disassembled, and belongs to the technical field of petroleum drilling equipment.

Background technique

In oil drilling operations, the drill string is formed by rotating several drill pipes in sequence. The purpose of the drill pipe is to transport the drilling mud to the drill bit, and raise, lower or rotate the bottom hole device together with the drill bit. The topmost drill pipe is connected with the kelly, and the kelly transmits the torque of the ground turntable to the drill pipe to drive the drill bit to rotate and bear the suspended weight of the drill pipe. During the drilling process, every time a drill pipe is added, it is necessary to separate the top drill pipe from the kelly, the lower end of the added drill pipe is screwed to the upper port of the original top drill pipe, and the upper end of the added drill pipe is connected to the added The lower end of the drill pipe is screwed. Multiple disassembly will easily lead to damage to the lower end thread of the kelly. In order to protect the kelly, a protective pup is usually installed between the kelly and the top kelly. No disassembly is required between the kelly and the protective pup. The pup joint and the top drill pipe are disassembled many times to join the drill pipe.

In order to remove large impurities in the drilling fluid, such as shells, rubber skins, straw sticks, iron pins, etc., a drilling fluid filter needs to be installed on the top of the drill string to prevent impurities from entering the gap between the downhole power equipment and directional tools and causing jamming , to avoid affecting normal production.

The traditional drilling fluid filter is installed in the inner cavity of the top drill pipe and suspended on the inner step of the box end. The drilling fluid enters the inner cavity of the filter from the upper end, flows downward through the mesh holes, and foreign matter is trapped in the inner cavity of the filter. . As the amount of drilling fluid filtered increases, the amount of foreign matter in the foreign matter storage chamber of the filter screen gradually increases; when the foreign matter storage chamber is filled with foreign matter, the filtering channel of the drilling fluid will be blocked, which will cause the pump pressure to rise. Therefore, when the drill pipe is added each time, the filter screen needs to be taken out, cleaned and placed in the new top drill pipe. Since the filter screen is basically invisible after the mud is filled inside the drill pipe, it is easy to forget to take out the filter screen; when entering the well, it must be pulled out, otherwise the drilling tool will be punctured and cause downhole accidents. Moreover, each time the filter screen is taken out for cleaning, it is time-consuming to replace the installation position, which has a huge impact on the timeliness of drilling production, and the time cost is high, which affects the production efficiency.

Another way is to make the protection pup joint and the filter screen into a whole, and place the filter screen inside the protection pup joint, and the filter screen cannot be disassembled on site. The protective pup joint is a vulnerable consumable. When making up and breaking out frequently, it often needs to be repaired. It must be replaced after about 300 hours, and the cost is relatively high.

Due to the relatively large amount of impurities in the mud on site, the filter screen is often blocked. The integrated protection nipple filter screen cannot be installed by itself after being disassembled and cleaned on site. It must be pulled back to the manufacturer for installation, which cannot meet the actual use requirements. When it is necessary to replace the filter screen, the protective nipple must be replaced directly, and it usually takes about 15 minutes to replace the protective nipple, which is very time-consuming, and the drilling tool is inactive for a long time at the bottom of the well, which may easily cause downhole accidents.

Utility model content

The purpose of this utility model is to overcome the problems existing in the prior art and provide a drilling fluid filter screen device that can be quickly installed and disassembled, which can reduce the number of make-up and break-out of the protection sub-joint, improve the service life of the protection sub-joint, shorten the The time required to clean the filter.

In order to solve the above technical problems, a quick installable and dismountable drilling fluid filter device of the utility model includes a filter body and a filter collar, the filter body is cylindrical, and the upper end of the filter body is open And the lower end is closed, a plurality of filter holes are evenly distributed on the circumference and the lower end surface of the filter screen body, the filter screen collar is cylindrical and has openings at both ends, and the upper end of the filter screen body is clamped on the filter screen clamp bottom of the circle.

Compared with the prior art, the utility model has achieved the following beneficial effects: the device is installed inside the protection sub, the lower port of the filter collar is supported on the inner step of the protection sub, and the upper end of the filter collar is covered by the kelly The lower port is pressed; the upper end of the filter screen body is clipped to the lower end of the filter screen collar so that the filter screen body hangs below the filter screen collar, and the lower end of the filter screen body protrudes out of the protection nipple. Such a structure does not need to take out the drilling fluid filter screen from the inner cavity of the drill pipe when adding the drill pipe, and the situation of forgetting to take out the filter screen will not occur, which improves fault tolerance and saves time. The protective sub and the drilling fluid filter device are made into two detachable parts, which reduces the difficulty of processing and installation, and only needs to process the inner step in the most commonly used protective sub, which increases the applicability and reduces the replacement cost; filter The mesh body and the filter collar adopt a clamping structure, which is convenient for the installation and removal of the filter and ensures the safety and stability of the filter.

As an improvement of the utility model, the upper port of the filter screen body is connected with an outwardly folded filter screen flange, and the outer circumference of the filter screen flange is symmetrically provided with filter screen lugs extending radially outward. ; The lower port of the filter collar is provided with a lug chute corresponding to the filter lug, the lower end of the lug chute is open and the upper end extends axially upwards respectively, each of the lugs slides The upper ends of the grooves are respectively bent to the same side of the circle of the filter screen collar; the filter screen hanging ears are respectively clamped at the inner ends of the corresponding hanging lug chute. When installing, hold the cylindrical wall of the filter body, align the filter lug with the lower port of the lug chute of the filter collar, push the filter lug upward into the lug chute and move along the lug chute. Go up to the bend, and then rotate the filter screen body so that the filter screen lugs abut against the inner end of the lug chute, which realizes the suspension of the filter screen body. Axial through grooves can be processed on the inner step of the protection nipple to facilitate the upward movement of the filter lugs; the thickness of the lower port of the filter collar can also be thickened so that the outer circumference of the lower port of the filter collar is pressed against the inner surface of the protection nipple. On the step, the inner diameter of the filter collar is smaller than the inner diameter of the inner step of the protection pup joint, so as to ensure that the filter lug can go up and hang along the lug chute.

As a further improvement of the present utility model, the inner ends of the lug chutes are respectively connected with lug slots, and each of the lug slots extends along the axial direction of the filter collar, and the filter lugs snap into the corresponding mounting ear slots respectively. The filter hanging lug slides to the root of the hanging lug chute and falls into the hanging lug slot, which can make the connection between the filter hanging lug and the filter collar more stable and reliable. When removing the filter, just push up first to make the filter hang Align the lugs with the horizontal section of the lug chute, then rotate the filter body so that the filter lugs reach the axial section of the lug chute, and then pull out the filter body downwards.

As a further improvement of the present utility model, four hanging lugs of the filter screen are arranged symmetrically along the outer circumference of the flange of the filter screen, and four hanging lug chutes are symmetrically arranged on the collar of the filter screen. The filter hanging lugs are set on the four phases, which can make the connection between the filter body and the filter collar more stable and reliable.

Description of drawings

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings are only provided for reference and description, and are not intended to limit the utility model.

Fig. 1 is the front view of the filter screen body in the utility model.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a perspective view of FIG. 1 .

Fig. 4 is the front view of the filter screen collar in the utility model.

Fig. 5 is a sectional view along A-A in Fig. 4 .

FIG. 6 is a perspective view of FIG. 4 .

Fig. 7 is a perspective view of the filter screen body and the filter screen collar before installation.

Fig. 8 is a perspective view of the filter screen body and the filter screen collar after installation.

In the figure: 1. filter body; 1a. filter hole; 2. filter flange; 3. filter hanger; 4. filter collar; 4a. hanger chute;

detailed description

As shown in Figures 1 to 8, the drilling fluid filter device of the utility model that can be quickly installed and disassembled includes a filter screen body 1 and a filter screen collar 4, the filter screen body 1 is cylindrical, and the upper end of the filter screen body 1 is open and The lower end is closed, and the circumference and lower end surface of the filter screen body 1 are evenly distributed with a plurality of filter holes 1a. The filter screen collar 4 is cylindrical and has openings at both ends.

The upper port of the filter body 1 is connected with a filter flange 2 that is folded outward, and the outer circumference of the filter flange 2 is symmetrically provided with filter lugs 3 that extend radially outward; The port is provided with a hanging lug chute 4a corresponding to the filter lug 3. The lower end of the hanging lug chute 4a is open and the upper end extends upwards in the axial direction respectively. The same side is bent; the filter hanging lugs 3 are respectively stuck at the inner ends of the corresponding hanging lug chute 4a.

The device is installed inside the protection pup joint, the lower port of the filter screen collar 4 is supported on the inner step of the protection sub joint, the upper end of the filter screen collar 4 is pressed by the lower port of the kelly; the upper end of the filter screen body 1 is clamped At the lower end of the filter screen collar 4, the filter screen body 1 is suspended below the filter screen collar 4, and the lower end of the filter screen body 1 protrudes out of the protection nipple. The protective sub and the drilling fluid filter device are made into two detachable parts, which reduces the difficulty of processing and installation, and only needs to process the inner step in the most commonly used protective sub, which increases the applicability and reduces the replacement cost; filter The mesh body 1 and the filter collar 4 adopt a clamping structure, which facilitates the installation and removal of the filter and ensures the safety and stability of the filter.

When installing, hold the cylindrical wall of the filter body 1, align the filter hanger 3 with the lower port of the hanger chute 4a of the filter collar 4, and push the filter hanger 3 upward into the hanger chute 4a And go up to the bend along the lug chute 4a, then rotate the filter screen body 1 to make the filter screen lug 3 abut against the inner end of the lug chute 4a, which realizes the suspension of the filter screen body 1.

The inner ends of each lug chute 4a are respectively connected with lug slots 4b, and each lug slot 4b extends along the axial direction of the filter collar 4, and the filter lugs 3 are respectively stuck in the corresponding lug slots. 4b. The filter hanging lug 3 slides to the root of the hanging lug chute 4a and then falls into the hanging lug slot 4b, which can make the connection between the filter hanging lug 3 and the filter collar 4 more stable and reliable. Push the filter screen lug 3 to the horizontal section of the lug chute 4a, then rotate the filter body 1 so that the filter screen lug 3 reaches the axial section of the lug chute 4a, and then pull out the filter body 1 downwards. Can.

There are four filter screen hanging lugs 3 arranged symmetrically along the outer circumference of the filter screen flange 2 , and four hanging lug slides 4 a are symmetrically provided on the filter screen collar 4 . The filter hangers 3 are provided on the four phases, which can make the connection between the filter body 1 and the filter collar 4 more stable and reliable.

Reaming can be carried out from the water eye part of the female end of the protection nipple to the direction of the male eye, and an inner step can be processed to place the filter sleeve. For example, the inner diameter of the water eye of the normal protection nipple is 108m, and the inner step and the female end The inner diameter of the water hole between the buckles is 111mm, and the axial through groove is processed on the inner step to facilitate the upward movement of the filter lug 3; the filter ferrule is first placed on the inner step of the protection nipple, and the protection nipple is connected to the square drill After the rod is on, insert upward from the filter body 1 from the male buckle end of the protective pup joint, that is, the lower part, to complete the connection with the filter sleeve.

It is also possible to thicken the thickness of the lower port of the filter collar 4, so that the outer circumference of the lower port of the filter collar is pressed against the inner step of the protection nipple. The inner diameter of the filter collar 4 is smaller than the inner diameter of the inner step of the protection nipple, ensuring that the filter The hanging lug 3 can go up and hang along the hanging lug chute 4a.

The above descriptions are only preferred feasible embodiments of the present utility model, and are not intended to limit the patent protection scope of the present utility model. In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The undescribed technical features of the utility model can be realized by or adopting the prior art, and will not be repeated here.

Claims (4)

1. A drilling fluid filter screen device that can be quickly installed and disassembled, comprising a filter screen body, the filter screen body is cylindrical, the upper end of the filter screen body is open and the lower end is closed, the circumference of the filter screen body and There are a plurality of filter holes evenly distributed on the lower end surface, and it is characterized in that: it also includes a filter collar, the filter collar is cylindrical and has openings at both ends, and the upper end of the filter body is clamped on the filter collar. lower end. 2. The drilling fluid filter device that can be quickly installed and disassembled according to claim 1, characterized in that: the upper port of the filter body is connected with an outwardly folded filter flange, and the filter flange The outer circumference of the filter is symmetrically provided with filter lugs extending radially outward; the lower port of the filter collar is provided with a lug chute corresponding to the filter lug, and the lug chute of the lug The lower end is open and the upper ends extend axially upwards respectively, and the upper ends of each hanging lug chute are respectively bent to the same side of the circle of the filter screen collar; the filter hanging lugs are respectively clamped at the inner ends of the corresponding hanging lug chute . 3. The rapidly installable and dismountable drilling fluid filter device according to claim 2, characterized in that: the inner ends of each lug chute are respectively connected with lug inlays, each of the lug inlays Extending along the axial direction of the filter screen collar respectively, the filter screen hanging ears are respectively clamped in the corresponding hanging ear sockets. 4. The rapidly installable and dismountable drilling fluid filter device according to claim 2 or 3, characterized in that: four filter hangers are arranged symmetrically along the outer circumference of the filter flange, and the Four hanging lug chutes are symmetrically arranged on the filter screen collar.