High-pressure-bearing type sand control screen pipe

Abstract

The utility model relates to a sand control screen pipe for the petroleum industry, in particular to a high-pressure-bearing sand control screen pipe. According to the technical scheme, an inner protective sleeve is installed on the outer wall of a base pipe and is manufactured in a spiral coiling and welding mode, and liquid through holes are distributed in the pipe wall; more than one group of flow guide layers and filter screens are arranged on the outer side of the inner protective sleeve, and a high-pressure-bearing layer is arranged outside the filter screen on the outermost side and is formed by winding wires or winding belts; the two ends of the inner protective sleeve, the two ends of the flow guide layer, the two ends of the filter screen, the two ends of the high pressure bearing layer and the two ends of the outer protective sleeve are extruded together through extrusion type end rings, and the outer ends of the extrusion type end rings are fixed to the pipe wall of the base pipe through welding. The filter has the beneficial effects that on one hand, the high-pressure-bearing layer is wound on the outer ring of the filter screen, so that the filter screen is effectively protected; and on the other hand, the two ends of the inner protective sleeve, the flow guide layer, the filter screen, the high pressure-bearing layer and the outer protective sleeve are extruded and fixed through the extrusion type end rings, the fixing effect is improved, and the service life of the screen pipe is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to sand control screen pipe technical field for petroleum industry, especially in kind high pressure type sand control screen pipe. BACKGROUND

[0002] In the oil field drilling well completion or oil production process, the filter screen sand control screen pipe is a commonly used downhole tool, mainly by base pipe, filter layer, protective sleeve is formed. Base pipe generally adopts the slotted screen pipe or punching pipe to make;Filter layer generally uses 3-7 layers of stainless steel woven wire mesh to wrap layer by layer and then is welded into a filter pipe by resistance welding straight seam, is sleeved on the base pipe, plays sand control and filtering effect;Protective sleeve is usually 1.2-1.5mm wall thickness straight seam welded punching pipe or spiral welded mesh pipe, which protects the screen pipe. In the development of loose sandstone oil and gas water blocks, the problem of fine particles in the formation plugging the filter layer is prone to occur;In addition, when high-pressure steam is injected, high pressure is generated in the well, and the pressure bearing capacity of the filter screen is insufficient, so the high-speed flow of sand-containing liquid will cause the filter screen to be damaged, reducing the service life of the screen pipe, and thus the sand control failure is prone to occur. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a kind of high pressure type sand control screen pipes to the above defects existing in prior art, one aspect is by adopting high pressure layer winding in filter screen outer circle, effectively realizes the fastening effect to filter screen, flow guide layer and inner protective sleeve, to protect filter screen;The other side, by extruding type end ring extrusion fixed inner protective sleeve, flow guide layer, filter screen, high pressure layer and the both ends of outer protective sleeve, improve the fixing effect, prolong the service life of screen pipe.

[0004] The utility model discloses a kind of high pressure type sand control screen pipes, its technical scheme is: including base pipe (1), filter screen (4), outer protective sleeve (6), there are slit (9) or through-hole on the pipe wall of base pipe (1), and filter screen (4) is installed outside slit (9) or through-hole, filter screen (4) installs outer protective sleeve (6) outside, wherein, it further includes inner protective sleeve (2), flow guide layer (3), high pressure layer (5) and extruding type end ring (7), inner protective sleeve (2) is installed on the outer wall of base pipe (1), the inner protective sleeve (2) is made of spiral roll welding, and pipe wall is distributed with liquid passage (2.2);More than one group of flow guide layer (3) and filter screen (4) are arranged outside inner protective sleeve (2), high pressure layer (5) is arranged outside the outermost filter screen (4), and the high pressure layer (5) is made of winding wire or winding belt;The both ends of the inner protective sleeve (2), flow guide layer (3), filter screen (4), high pressure layer (5) and outer protective sleeve (6) are extruded together by extruding type end ring (7), and the outer end of the extruding type end ring (7) is fixed on the pipe wall of base pipe (1) by welding.

[0005] Preferably, two groups of flow guide layers (3) and two groups of filter screens (4) are arranged outside the inner protective sleeve (2), the flow guide layers (3) and the filter screens (4) are made of stainless steel screens, and the inner diameter of the mesh of the flow guide layer (3) is larger than the inner diameter of the mesh of the filter screen (4).

[0006] Preferably, the inner protective sleeve (2) comprises a stainless steel belt (2.1), a liquid passage (2.2) and a spiral weld (2.3), the surface of the stainless steel belt (2.1) is uniformly distributed with a plurality of liquid passages (2.2), the stainless steel belt (2.1) is formed by spiral winding, and the stainless steel belts (2.1) are fixedly connected through the spiral weld (2.3).

[0007] Preferably, the winding wire is made of a metal wire and is uniformly wound on the outermost filter screen (4) to form a spiral winding structure.

[0008] Preferably, the winding belt is made of a long strip-shaped metal screen and is uniformly wound on the outermost filter screen (4) to form a spiral winding structure.

[0009] Preferably, the winding wire is made of a high-strength composite material wire and is uniformly wound on the outermost filter screen (4) to form a spiral winding structure.

[0010] Preferably, the winding belt is made of a long strip-shaped high-strength composite material screen and is uniformly wound on the outermost filter screen (4) to form a spiral winding structure.

[0011] The beneficial effects of the high-pressure layer of the utility model are that the high-pressure layer of the utility model adopts winding wire or winding belt, is wound on the outer ring of the filter screen, effectively fastens the filter screen, the flow guide layer and the inner protective sleeve, thereby protecting the filter screen and overcoming the impact damage of the sand-containing liquid in the stratum to the filter screen; in addition, the two ends of the inner protective sleeve, the flow guide layer, the filter screen, the high-pressure layer and the outer protective sleeve are fixed together through the extrusion type end ring, and the outer end of the extrusion type end ring is fixed on the pipe wall of the base pipe through welding, which not only reduces the fixing difficulty, but also improves the fixing effect and reduces the welding cost; in general, the utility model has the characteristics of high pressure-bearing strength, strong corrosion and scale resistance and anti-clogging, further improves the sand prevention construction success rate, effectively prolongs the sand prevention service life of the screen pipe and greatly improves the development effect of the loose sandstone oil and gas water block. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the overall structure schematic view of the utility model;

[0013] Figure 2 is the local enlarged schematic view of A part of the utility model;

[0014] Figure 3 is a structural diagram of the extruded end ring;

[0015] Figure 4 is a structural diagram of the inner protective sleeve;

[0016] Figure 5 is a structural diagram of the winding belt winding on the filter screen;

[0017] In the above figure: base pipe 1, inner protective sleeve 2, flow guide layer 3, filter screen 4, high pressure bearing layer 5, outer protective sleeve 6, extruded end ring 7, coupling 8, slotted hole 9, welding seam 10, stainless steel belt 2.1, liquid passage hole 2.2, spiral welding seam 2.3. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0019] Embodiment 1, refer to Figures 1-4 The high pressure bearing sand screen pipe provided by the present application comprises a base pipe 1, a filter screen 4 and an outer protective sleeve 6, the base pipe 1 has slotted holes 9 or through holes distributed on the pipe wall, and the filter screen 4 is installed outside the slotted holes 9 or the through holes, and the outer protective sleeve 6 is installed outside the filter screen 4, wherein the high pressure bearing sand screen pipe further comprises an inner protective sleeve 2, a flow guide layer 3, a high pressure bearing layer 5 and an extruded end ring 7, the inner protective sleeve 2 is installed on the outer wall of the base pipe 1, the inner protective sleeve 2 is made of spiral winding and has liquid passage holes 2.2 distributed on the pipe wall, a group of flow guide layers 3 and filter screens 4 are arranged outside the inner protective sleeve 2, the high pressure bearing layer 5 is arranged outside the outermost filter screen 4, the high pressure bearing layer 5 is composed of winding wires or winding belts, the inner protective sleeve 2, the flow guide layer 3, the filter screen 4, the high pressure bearing layer 5 and the outer protective sleeve 6 are extruded together through the extruded end ring 7, and the outer end of the extruded end ring 7 is fixed on the pipe wall of the base pipe 1 through welding.

[0020] More preferably, two groups of flow guide layers 3 and two groups of filter screens 4 are arranged outside the inner protective sleeve 2, the flow guide layers 3 and the filter screens 4 are made of stainless steel screens, the inner diameter of the mesh of the flow guide layer 3 is greater than the inner diameter of the mesh of the filter screen 4, so that the flow guide layer 3 has the function of guiding flow and improves the liquid passing capacity.

[0021] Refer to Figure 3 The inner side of one end of the extruded end ring 7 is a bevel structure, which is used for more stable extrusion of the outer protective sleeve 6, the high pressure bearing layer 5, the filter screen 4, the flow guide layer 3 and the inner protective sleeve 2, and plays a better fixing role, and the outer end of the extruded end ring 7 is fixed on the pipe wall of the base pipe 1 through welding to form a welding seam 10, thereby avoiding the problem of poor fixation of the filter screen directly welded on the base pipe in the prior art.

[0022] Referring to Figure 4 The inner protective sleeve 2 comprises a stainless steel belt 2.1, liquid passing holes 2.2 and spiral welds 2.3, the surface of the stainless steel belt 2.1 is uniformly distributed with multiple groups of the liquid passing holes 2.2, the stainless steel belt 2.1 is formed by spiral winding, and the stainless steel belts 2.1 are fixedly connected through the spiral welds 2.3.

[0023] Referring to Figure 2 The winding wire adopts stainless steel wires and is uniformly wound on the outermost filter screen 4 to form a spiral winding structure, the filter screen 4, the flow guiding layer 3 and the inner protective sleeve 2 are tightly fixed and wound on the wall of the base pipe 1, the fixing strength is improved, the filter screen, the flow guiding layer and the inner protective sleeve are effectively fastened, the filter screen is protected, and the impact damage of the sand-containing liquid to the filter screen is overcome.

[0024] In use, the base pipe 1 is connected with the coupling 8 and lowered into the well, the sand-containing liquid enters the high pressure bearing layer 5 through the liquid passing holes of the outer protective sleeve 6, the high pressure bearing layer 5 adopts stainless steel wires and is uniformly wound on the outermost filter screen 4 to form a spiral winding structure, the filter screen is effectively fastened through being wound on the outer ring of the filter screen, the filter screen 4 is protected, and the high pressure bearing effect is achieved; then, the sand-containing liquid passes through the first-stage filter screen 4 and the flow guiding layer 3, and then passes through the second-stage filter screen 4 and the flow guiding layer 3, the sand particles are isolated outside by the filter screen 4, the liquid smoothly enters the inner protective sleeve 2, and then enters the inner cavity of the base pipe 1 along the slits 9 or the through holes of the base pipe 1, and the sand prevention function is achieved.

[0025] The base pipe has the characteristics of high pressure bearing, strong corrosion and scale resistance and anti-clogging, the sand prevention construction success rate is further improved, the sand prevention service life of the screen pipe is effectively prolonged, and the development effect of the loose sandstone oil and gas water block is greatly improved.

[0026] The utility model discloses a high pressure type sand prevention screen pipe, including base pipe 1, filter screen 4, outer protective sleeve 6, there are slit 9 or through -hole on the pipe wall of base pipe 1, and install filter screen 4 outside slit 9 or through -hole, the outside installation outer protective sleeve 6 of filter screen 4, wherein, still including inner protective sleeve 2, flow guide layer 3, high pressure layer 5 and extruding end ring 7, install inner protective sleeve 2 on the outer wall of base pipe 1, the inner protective sleeve 2 adopts spiral roll welding and is made, and the pipe wall is distributed with liquid passage hole 2.2, there is more than a group of flow guide layer 3 and filter screen 4 outside the outer side of inner protective sleeve 2, and high pressure layer 5 is arranged outside the outermost filter screen 4, and high pressure layer 5 adopts winding wire or winding belt and is formed, the both ends of inner protective sleeve 2, flow guide layer 3, filter screen 4, high pressure layer 5 and outer protective sleeve 6 are extruded together through extruding end ring 7, and the outer end of extruding end ring 7 is fixed on the pipe wall of base pipe 1 through welding.

[0027] The difference from example 1 is that:

[0028] Referring to Figure 5 The winding belt of the embodiment is made of a long strip-shaped metal mesh belt, and is uniformly and spacedly wound on the outermost filter screen 4 to form a spiral winding structure. The winding belt can firmly fix the filter screen 4, the flow guide layer 3 and the inner protective sleeve 2, and the spaced metal mesh belts improve the fastening effect without affecting the liquid filtering function of the filter screen.

[0029] The utility model discloses a high pressure type sand prevention screen pipe, including base pipe 1, filter screen 4, outer protective sleeve 6, there are slit 9 or through -hole on the pipe wall of base pipe 1, and install filter screen 4 outside slit 9 or through -hole, the outside installation outer protective sleeve 6 of filter screen 4, wherein, still including inner protective sleeve 2, flow guide layer 3, high pressure layer 5 and extruding end ring 7, install inner protective sleeve 2 on the outer wall of base pipe 1, the inner protective sleeve 2 adopts spiral roll welding and is made, and the pipe wall is distributed with liquid passage hole 2.2, there is more than a group of flow guide layer 3 and filter screen 4 outside the outer side of inner protective sleeve 2, and high pressure layer 5 is arranged outside the outermost filter screen 4, and high pressure layer 5 adopts winding wire or winding belt and is formed, the both ends of inner protective sleeve 2, flow guide layer 3, filter screen 4, high pressure layer 5 and outer protective sleeve 6 are extruded together through extruding end ring 7, and the outer end of extruding end ring 7 is fixed on the pipe wall of base pipe 1 through welding.

[0030] The difference from example 1 is that:

[0031] The winding belt of the embodiment is made of a long strip-shaped metal mesh belt, and is uniformly and spacedly wound on the outermost filter screen 4 to form a spiral winding structure. The winding belt can firmly fix the filter screen 4, the flow guide layer 3 and the inner protective sleeve 2, and the spaced metal mesh belts improve the fastening effect without affecting the liquid filtering function of the filter screen.

[0032] In the embodiment 3, the high-pressure resistant sand-preventing screen pipe comprises a base pipe 1, a filter screen 4 and an outer protective sleeve 6, the base pipe 1 is provided with slits 9 or through holes on the pipe wall, the filter screen 4 is arranged outside the slits 9 or the through holes, and the outer protective sleeve 6 is arranged outside the filter screen 4, wherein the high-pressure resistant sand-preventing screen pipe further comprises an inner protective sleeve 2, a flow guide layer 3, a high-pressure resistant layer 5 and an extruded end ring 7, the inner protective sleeve 2 is arranged on the outer wall of the base pipe 1, the inner protective sleeve 2 is made of spiral winding and welding, and the pipe wall is provided with liquid through holes 2.2; a plurality of flow guide layers 3 and filter screens 4 are arranged outside the inner protective sleeve 2, the high-pressure resistant layer 5 is arranged outside the outermost filter screen 4, the high-pressure resistant layer 5 is made of winding wires or winding belts; and the inner protective sleeve 2, the flow guide layer 3, the filter screen 4, the high-pressure resistant layer 5 and the outer protective sleeve 6 are extruded together through the extruded end ring 7 at both ends, and the outer end of the extruded end ring 7 is fixed on the pipe wall of the base pipe 1 by welding.

[0033] The difference between the embodiment 2 and the embodiment 3 is that:

[0034] The winding belt mentioned in the embodiment is a long strip-shaped high-strength composite material screen, which is uniformly wound on the outermost filter screen 4 to form a spiral winding structure, and can firmly fix the filter screen 4, the flow guide layer 3 and the inner protective sleeve 2, and play a fastening role.

[0035] The above is only a preferred embodiment of the utility model, and any skilled person in the art can modify the utility model by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent transformation according to the technical solutions of the utility model is within the scope of protection of the utility model.

Claims

1. A high-pressure sand screen pipe, comprising a base pipe (1), a filter screen (4), and an outer protective sleeve (6), wherein slits (9) or through holes are distributed on the pipe wall of the base pipe (1), and a filter screen (4) is installed on the outside of the slits (9) or through holes, and an outer protective sleeve (6) is installed on the outside of the filter screen (4), characterized in that: It also includes an inner protective sleeve (2), a flow guiding layer (3), a high pressure bearing layer (5), and a squeeze-type end ring (7). The inner protective sleeve (2) is installed on the outer wall of the base pipe (1). The inner protective sleeve (2) is made of spiral rolling and welding, and the pipe wall is distributed with liquid passage holes (2.2). On the outer side of the inner protective sleeve (2), there is one or more flow guiding layers (3) and filter screens (4). A high pressure bearing layer (5) is installed outside the outermost filter screen (4). The high pressure bearing layer (5) is composed of winding wire or winding tape. The two ends of the inner protective sleeve (2), flow guiding layer (3), filter screen (4), high pressure bearing layer (5), and outer protective sleeve (6) are squeezed together by the squeeze-type end ring (7), and the outer end of the squeeze-type end ring (7) is fixed to the pipe wall of the base pipe (1) by welding.

2. The high-pressure sand-proof screen pipe according to claim 1, characterized in that: Two sets of flow guiding layers (3) and two sets of filter screens (4) are provided on the outside of the inner protective sleeve (2). The flow guiding layers (3) and filter screens (4) are made of stainless steel mesh, and the inner diameter of the mesh of the flow guiding layer (3) is larger than the inner diameter of the mesh of the filter screen (4).

3. A high-pressure sand-proof screen pipe according to claim 2, characterized in that: The inner protective sleeve (2) includes a stainless steel strip (2.1), a liquid passage hole (2.2) and a spiral weld (2.3). Multiple sets of liquid passage holes (2.2) are evenly distributed on the surface of the stainless steel strip (2.1). The stainless steel strip (2.1) is formed by spiral rolling and welding, and the stainless steel strips (2.1) are fixedly connected to each other by the spiral weld (2.3).

4. A high-pressure sand-proof screen pipe according to claim 1, characterized in that: The winding line is made of metal wire and is evenly wound on the outermost filter screen (4) to form a spiral winding structure.

5. A high-pressure sand-proof screen pipe according to claim 1, characterized in that: The winding tape is made of a long strip of metal mesh and is evenly wound on the outermost filter screen (4) to form a spiral winding structure.

6. A high-pressure sand-proof screen pipe according to claim 1, characterized in that: The winding thread is made of high-strength composite material thread and is evenly wound on the outermost filter screen (4) to form a spiral winding structure.

7. A high-pressure sand-proof screen pipe according to claim 1, characterized in that: The winding tape is made of a long strip of high-strength composite material mesh, and is evenly wound on the outermost filter mesh (4) to form a spiral winding structure.

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