CN203239299U - Packing device for gravel packing in horizontal well pipe - Google Patents

Abstract

A packing assembly for gravel packing within a horizontal well tubular, the packing assembly comprising: the in-pipe filling service tool is provided with a plurality of first filling holes along the circumferential direction; the intraductal filling tool, its inside is connected with above-mentioned intraductal filling service tool, intraductal filling tool includes top connection, fills switch module, overcoat, holding ring and lower clutch, upper and lower clutch connect respectively the left and right both ends of intraductal filling tool, fill the left end of switch module and connect the top connection, fill the right-hand member of switch module and connect the overcoat, the lower clutch connect the right-hand member of overcoat, the holding ring is connected on the overcoat, and is located the left side of lower clutch, fill the switch module including filling a section of thick bamboo, sliding sleeve and a plurality of second filling hole, the sliding sleeve is located the radial inboard in second filling hole, first, second filling hole correspond; the sliding sleeve is axially slidable by the action of the filling service tool in the tube to open or close the second filling hole.

Description

Packing device for gravel packing in horizontal well pipe

technical field

The utility model relates to the field of sand control in oil production engineering, in particular to a filling device for gravel filling in horizontal well pipes.

Background technique

Casing perforation completion and screen sand control completion are the main completion methods for horizontal wells. With the progress of production, once the oil well produces sand, it is necessary to carry out sand control in the horizontal well pipe. The sand control technology of gravel packing in the horizontal well pipe is one of the sand control technologies in the horizontal well pipe, which has the characteristics of outstanding sand control effect and long effective period of sand control. The application of this technology can effectively prevent oil wells from sanding, especially for fine silt sand, and can make oil wells fully exert their production capacity.

At present, most of the packing tools used in the gravel packing sand control technology in horizontal well pipes are installed on the top (in the technical casing at the heel of the horizontal well), and the packing tools are often combined with packers to form a horizontal well pipe packing device. It contains functional mechanisms such as setting, suspension, hand throwing, sand filling, and backwashing. The structure is complex and the outer diameter is large. During the construction process, there are problems such as difficulty in loading and failure of functional mechanisms, resulting in failure of sand filling.

Utility model content

The purpose of the utility model is to provide a filling device for gravel filling in the horizontal well pipe, which has a simple structure, reduces the difficulty of filling construction, and can realize circulating gravel filling and squeezing gravel filling in the horizontal well pipe.

Above-mentioned purpose of the utility model can adopt following technical scheme to realize:

A packing device for gravel packing in a horizontal well pipe, the packing device includes: an in-pipe filling service tool, on which a plurality of first filling holes are arranged along the circumference; an in-pipe filling tool, which is connected to the above-mentioned in-pipe filling service tool, The filling tool in the pipe includes an upper joint, a filling switch assembly, a jacket, a positioning ring and a lower joint. The upper and lower joints are respectively connected to the left and right ends of the filling tool in the pipe, and the left end of the filling switch assembly is connected to The upper joint, the right end of the filling switch assembly is connected to the jacket, the lower joint is connected to the right end of the jacket, the positioning ring is connected to the jacket and is located on the left side of the lower joint, the filling switch assembly includes A filling cylinder, a sliding sleeve and a plurality of second filling holes, the left end of the filling cylinder is connected to the upper joint, the inner left end of the filling cylinder is connected to a sealing ring, the right end of the filling cylinder is connected to the outer jacket, the filling The cylinder is provided with the second filling hole, the sliding sleeve is located on the radial inner side of the second filling hole, and the second filling hole corresponds to the first filling hole; the service tool is filled in the tube, and the sliding sleeve The sleeve is axially slidably connected to the inner side of the filling cylinder to open or close the second filling hole.

As mentioned above, the packing device for gravel packing in the horizontal well pipe, the sliding sleeve has a cylindrical body and a sliding sleeve protrusion, the sliding sleeve protrusion is connected to the right end of the cylindrical body, and a spring is connected to the inside of the outer casing, The two ends of the spring respectively bear against the protrusion of the sliding sleeve and the positioning ring.

According to the packing device for gravel packing in the horizontal well pipe as mentioned above, the filling switch assembly further includes a casing protector connected to the right end of the packing cylinder and located on the left of the casing.

As mentioned above, the packing device for gravel packing in the horizontal well pipe, the packing cylinder includes a first cylinder body and a second cylinder body connected to each other, the first cylinder body is located on the left side of the second cylinder body, and the The second filling hole is set between the first and second cylinders, the inner surface of the second cylinder is flush with the inner surface of the first cylinder, and the outer surface of the second cylinder protrudes outward from the first cylinder The right end of the sleeve protector is connected to the outside of the second cylinder, and the left end of the sleeve protector has an opening with the outside of the first cylinder.

According to the packing device for gravel packing in the horizontal well pipe as mentioned above, the pipe filling service tool includes a packing pipe and a guide rod, the first filling hole is provided on the packing pipe, and the right end of the packing pipe is provided with a There are steps, the right end of the filling tube is internally threaded to the guide rod, and the left end of the guide rod is located on the right of the first filling hole, and the right end of the guide rod is in the shape of a cone; as the filling service tool in the tube is set into In the tube filling tool, the step pushes the sliding sleeve to move to the right to open the second filling hole.

According to the above-mentioned packing device for gravel packing in the horizontal well pipe, the left end of the guide rod is provided with a cone.

As mentioned above for the filling device for gravel filling in the horizontal well pipe, the right end of the guide rod is provided with a plurality of guide bodies along the circumference, positioning grooves are provided between each guide body, and positioning keys are provided on the positioning ring; When the tube filling service tool is inserted into the tube filling tool, the positioning key is inserted into the positioning groove.

Features and advantages of the utility model are:

1. The packing device has a small outer diameter and can be installed at the bottom of a horizontal well without affecting the inner diameter of the sand control string for gravel packing in the pipe.

2. The filling device does not need mechanisms such as setting, hanging, and throwing away, and has a simple structure, which reduces the difficulty of filling construction.

3. The packing device has strong applicability and can be used for circulating gravel packing and extruding gravel packing in horizontal well pipes, especially for gravel packing and sand control in horizontal well pipes for heavy oil thermal recovery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the semi-sectional schematic diagram of the filling tool in the pipe of the packing device for gravel packing in the horizontal well pipe according to the embodiment of the present invention;

Fig. 2 is a half-sectional schematic diagram of the filling service tool in the pipe of the filling device for gravel packing in the horizontal well pipe according to the embodiment of the present invention;

Fig. 3 is a half-sectional schematic diagram of a packing device for gravel packing in a horizontal well pipe according to an embodiment of the present invention;

Fig. 4 is an example diagram of the implementation process of the in-pipe gravel packing process using the embodiment of the present invention;

Fig. 5 is the A-A line sectional schematic diagram of Fig. 1;

Fig. 6 is the B-B line sectional schematic diagram of Fig. 1;

Fig. 7 is the C-C line sectional schematic diagram of Fig. 2;

Fig. 8 is a schematic cross-sectional view of the D-D line of Fig. 2;

Fig. 9 is the E-E line sectional schematic diagram of Fig. 3;

FIG. 10 is a schematic cross-sectional view taken along line F-F of FIG. 3 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The left-right positional relationship in this article is for the use state of the filling device in the horizontal well (ie the positional relationship in Figure 3).

As shown in FIG. 1 to FIG. 10 , the packing device for gravel packing in a horizontal well pipe proposed by the embodiment of the utility model includes an in-pipe filling service tool 1 and an in-pipe filling tool 2 . The pipe filling service tool 1 is provided with a plurality of first filling holes 1a in the circumferential direction. The inside of the tube filling tool 2 is connected to the tube filling service tool 1, and the tube filling tool 2 includes an upper joint 2a, a filling switch assembly 2b, a jacket 2c, a positioning ring 2d and a lower joint 2e. The upper and lower joints 2a, 2e are respectively connected to the left and right ends of the in-pipe filling tool 2, the left end of the filling switch assembly 2b is connected to the upper joint 2a, and the right end of the filling switch assembly 2b is connected to the jacket 2c, The lower joint 2e is connected to the right end of the jacket 2c, the positioning ring 2d is connected to the jacket 2c, and is located on the left side of the lower joint 2e, and the filling switch assembly 2b includes a sliding sleeve 2b1, a plurality of first The second filling hole 2b2 and the filling cylinder 2b3, the sliding sleeve 2b1 is located on the radial inner side of the second filling hole 2b2, and the second filling hole 2b2 corresponds to the first filling hole 1a; through the action of the filling service tool 1 in the tube, The sliding sleeve 2b1 can slide axially to open or close the second filling hole 1a.

The left end of the filling cylinder 2b3 is connected to the upper joint 2a, the right end of the filling cylinder 2b3 is connected to the outer casing 2c, the filling cylinder 2b3 is provided with the second filling hole 2b2, and the sliding sleeve 2b1 can slide axially ground connected to the inside of the filling cylinder 2b3 to open or close the second filling hole 2b2.

Wherein, the positioning ring 2d is clamped in the casing 2c through the fixing pin 2d1; the upper joint 2a is used to connect the gravel-packed sand control string 3 in the pipe, and the lower joint 2e is used to connect the gravel-packed sand control string 3 in the pipe.

In this embodiment, when the tube filling service tool 1 enters the tube filling tool 2, it pushes the sliding sleeve 2b1 of the tube filling tool 2 to move axially to the right, so that the second filling hole 2b2 is opened, and the first and second filling holes The holes 1a and 2b2 correspond to each other, and can realize gravel packing in the horizontal well pipe. When the sand filling is finished, the pipe filling service tool 1 is separated from the pipe filling tool 2, and the sliding sleeve 2b1 loses the function of the pipe filling service tool 1 and moves axially to the left, so that the second filling hole 2b2 is closed.

The filling switch assembly 2b also includes a bushing protector 2b4, the bushing protector 2b4 is connected to the right end of the filling cylinder 2b3 and is located on the left side of the casing 2c. Further, the sleeve protector 2b4 is cylindrical, and it is screwed to the right end of the filling cylinder 2b3, which converts the radial movement of the liquid flowing out through the first and second filling holes 1a, 2b2 to the left. The axial movement prevents the liquid from directly impacting the completion string 5, and protects the completion string 5.

The filling cylinder 2b3 includes a first cylinder body 2b5 and a second cylinder body 2b6 connected to each other. The first cylinder body 2b5 is located on the left side of the second cylinder body 2b6. A second filling hole 2b2 is arranged between them, the first cylindrical body 2b5 is screwed to the upper joint 2a, and the second cylindrical body 2b6 is screwed to the outer casing 2c. Wherein, the inner surface of the second cylindrical body 2b6 is flush with the inner surface of the first cylindrical body 2b5, that is, on the same axial plane, and the outer surface of the second cylindrical body 2b6 protrudes outward from the outer surface of the first cylindrical body 2b5. , the right end of the sleeve protector 2b4 is connected to the outside of the second cylinder 2b6, and the left end of the sleeve protector 2b4 has an opening with the outside of the first cylinder 2b5.

According to one embodiment of the present utility model, the sliding sleeve 2b1 has a cylindrical body 2b7 and a sliding sleeve protrusion 2b8, the sliding sleeve protrusion 2b8 is connected to the right end of the cylindrical body 2b7, and a spring 2f is connected inside the outer sleeve 2b1 , the two ends of the spring 2f abut against the sliding sleeve protrusion 2b8 and the positioning ring 2d respectively. Wherein, under the action of the spring 2f, the sliding sleeve 2b1 can be simply and firmly slidably disposed inside the filling cylinder 2b3.

A sealing ring 2h is connected to the inner left end of the filling cylinder 2b3. The sealing ring 2h plays a role of sealing the fitting gap between the inner surface of the filling cylinder 2b3 and the outer surface of the in-pipe filling service tool 1 .

According to an embodiment of the present utility model, as shown in FIG. 7 , the pipe filling service tool 1 includes a filling pipe 1b and a guide rod 1c, the filling pipe 1b is provided with the first filling hole 1a, and the filling There is a step 1d on the outside of the right end of the tube 1b, the inside of the right end of the filling tube 1b is screwed to the guide rod 1c, and the left end of the guide rod 1c is located on the right of the first filling hole 1a, and the right end of the guide rod 1c is in the shape of a cone shape, so as to play the role of guiding the filling service tool 1 in the well; as the filling service tool 1 is set into the filling tool 2, the step 1d pushes the sliding sleeve 2b1 to Move right to open the second filling hole 2b2.

In this embodiment, when the tube filling service tool 1 is installed into the tube filling tool 2, the step 1d pushes the sliding sleeve 2b1 to slide axially to the right, and passes over the second cylinder body 2b6 of the filling cylinder 2b3 on the left side of the sliding sleeve 2b1 On the left side, the second filling hole 2b2 is fully open, as shown in Figure 3; when the tube filling service tool 1 leaves the tube filling tool 2, the sliding sleeve 2b1 loses the driving force of the step 1d, and further moves under the spring 2f. Under the action, the sliding sleeve 2b1 slides axially to the left. When the left side of the sliding sleeve protrusion 2b8 at the right end of the sliding sleeve 2b1 contacts the right side of the second cylinder 2b6, the sliding sleeve 2b1 is in the left limit state of movement. At this time, the second filling hole 2b2 is in a closed state, as shown in FIG. 1 .

The left end of the filling pipe 1b is processed with an oil pipe internal thread for connecting the sand filling pipe string 4; the right end of the filling pipe 1b is processed with an internal thread for connecting with the guide rod 1c.

According to one embodiment of the present utility model, the left end of the guide rod 1c is provided with a cone 1e, which guides the sand-carrying liquid and gravel, and uses the reflection effect to make the sand-carrying liquid and gravel in the filling pipe 1b move to the right. Axial flow is converted to radial flow.

As shown in Figure 2, Figure 6 and Figure 8, the right end of the guide rod 1c is provided with a plurality of guide bodies 1f along the circumference, and a positioning groove 1g is provided between each guide body 1f; a positioning key is provided on the positioning ring 2d 2d2, when the tube filling service tool 1 is inserted into the tube filling tool 2, the positioning key 2d2 is inserted into the positioning groove 1g to play a positioning role.

The process principle of the utility model embodiment is described below.

As shown in FIG. 4 , the in-pipe filling tool 2 is lowered together with the in-pipe gravel-packed sand control string 3 at the bottom of the horizontal well. The pipe filling service tool 1 is installed at the bottom of the sand-filling pipe string 4 and is lowered together with the sand-filling pipe string 4 . Insert the in-pipe filling service tool 1 into the inner cavity of the in-pipe filling service tool 1. Under the opening action of the in-pipe filling service tool 1, the second filling hole 2b2 of the in-pipe filling tool 2 is opened, and the first filling hole 1a of the in-pipe filling service tool 1 is connected to the The second filling hole 2b2 of the filling tool 2 faces directly.

The packing device can realize circulating gravel packing in the horizontal well pipe and squeezing gravel packing in the horizontal well pipe.

Take circulating gravel packing in a horizontal well pipe as an example: open the ground casing gate, pump sand-carrying fluid and gravel into the sand-packing pipe string 4 on the ground, the sand-carrying liquid flows downward with the gravel, and then pass through the pipe filling service tool 1 in sequence The filling hole and the filling tool 2 in the pipe flow into the annular space between the completion string 5 and the gravel-packed sand control string 3 in the pipe; the sand-carrying fluid moves toward the sand control packer 6 while carrying the gravel, The in-pipe gravel-packed sand control string 3 is filtered, and then returns to the ground through the annular space between the in-pipe gravel-packed sand control string 3 and the sand-packed string 4, and the annular space between the technical casing 7 and the sand-packed string 4. The gravel is deposited in the annular space between the completion string 5 and the gravel-packed sand control string 3 in the pipe. In this way, the circulating gravel packing in the horizontal well pipe is realized.

After the sand filling is completed, the sand filling string 4 is lifted up, the pipe filling service tool 1 is separated from the pipe filling tool 2, and the second filling hole 2b2 is closed; The backwash liquid is pumped into the space, and the backwash liquid moves downward. Since the second filling hole 2b2 is closed, the backwash liquid can only flow into the pipe for filling through the annular space between the gravel-packed sand control string 3 and the sand-packed string 4 in the pipe. The first filling hole 1a of the service tool 1 enters the sand-filling pipe string 4 through the first filling hole 1a of the service tool 1, and returns to the ground along the sand-filling pipe string 4, thereby realizing backwashing.

Wherein, the upper end of the well completion string 5 has a well completion tool 8 .

The above are only a few embodiments of the present utility model, and those skilled in the art can make various changes, modifications or combinations to the embodiments of the present utility model according to the contents disclosed in the application documents without departing from the spirit and spirit of the present utility model. scope.

Claims (7)

1. A packing device for gravel packing in a horizontal well pipe, characterized in that, the packing device comprises: The filling service tool in the pipe is provided with a plurality of first filling holes along the circumference; An in-pipe filling tool, which is connected to the above-mentioned in-pipe filling service tool, the in-pipe filling tool includes an upper joint, a filling switch assembly, a jacket, a positioning ring and a lower joint, and the upper and lower joints are respectively connected to the inner pipe filling tool Left and right ends, the left end of the filling switch assembly is connected to the upper joint, the right end of the filling switch assembly is connected to the jacket, the lower joint is connected to the right end of the jacket, the positioning ring is connected to the jacket, and is located On the left side of the lower joint, the filling switch assembly includes a filling cylinder, a sliding sleeve and a plurality of second filling holes, the left end of the filling cylinder is connected to the upper joint, and the inner left end of the filling cylinder is connected with a sealing The right end of the filling cylinder is connected to the jacket, the filling cylinder is provided with the second filling hole, the sliding sleeve is located on the radial inner side of the second filling hole, the second filling hole is connected to the first filling hole Correspondingly: through the tube filling service tool, the sliding sleeve can be axially slidably connected to the inner side of the filling cylinder to open or close the second filling hole. 2. The packing device for gravel packing in a horizontal well pipe according to claim 1, wherein the sliding sleeve has a cylindrical body and a sliding sleeve protrusion, and the sliding sleeve protrusion is connected to the right end of the cylindrical body, A spring is connected to the inside of the outer sleeve, and the two ends of the spring abut against the protrusion of the sliding sleeve and the positioning ring respectively. 3. The packing device for gravel packing in a horizontal well pipe according to claim 1, characterized in that, the filling switch assembly further comprises a casing protector connected to the right end of the packing cylinder, and located to the left of said jacket. 4. The packing device for gravel packing in a horizontal well pipe according to claim 3, wherein the packing cylinder comprises a first cylinder and a second cylinder connected to each other, and the first cylinder is located at the second On the left side of the second cylinder, the second filling hole is arranged between the first and second cylinders, the inner surface of the second cylinder is flush with the inner surface of the first cylinder, and the inner surface of the second cylinder is The outer surface protrudes outward from the outer surface of the first cylinder, the right end of the sleeve protector is connected to the outside of the second cylinder, and the left end of the sleeve protector has an opening with the outside of the first cylinder. 5. The packing device for gravel packing in horizontal well pipe according to claim 1, characterized in that, the service tool for packing in pipe comprises a packing pipe and a guide rod, and the packing pipe is provided with the first packing hole , the right end of the filling pipe is provided with a step outside, the right end of the filling pipe is internally threaded to the guide rod, and the left end of the guide rod is located on the right of the first filling hole, and the right end of the guide rod is in the shape of a cone; As the in-pipe filling service tool is set into the in-pipe filling tool, the step pushes the sliding sleeve to move to the right to open the second filling hole. 6. The packing device for gravel packing in a horizontal well pipe according to claim 5, wherein a cone is provided at the left end of the guide rod. 7. The packing device for gravel packing in a horizontal well pipe according to claim 5, characterized in that, the right end of the guide rod is provided with a plurality of guide bodies along the circumference, and positioning grooves are arranged between each guide body. A positioning key is provided on the positioning ring; when the in-tube filling service tool is inserted into the in-tube filling tool, the positioning key is inserted in the positioning groove.

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