Coiled tubing dragging water exploration tubular column for horizontal well

Abstract

The utility model discloses a horizontal well coiled tubing dragging water exploration tubular column which comprises a casing pipe, a water exploration tubular column assembly and a coiled tubing are sequentially arranged in the casing pipe from the toe end to the heel portion of a horizontal section, the water exploration tubular column assembly and the coiled tubing are connected through a coiled tubing connector, and the end, extending out of the casing pipe, of the coiled tubing is further provided with a blowout prevention assembly. By adopting the coiled tubing dragging water exploration tubular column for the horizontal well, the safety and environmental protection risks of a high-pressure water exploration well can be effectively solved, meanwhile, the setting qualification rate of a packer can be improved, and the water exploration period is further shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oilfield production technology field relates to horizontal well coiled tubing drag water finding pipe column. BACKGROUND

[0002] With the progress of science and technology and the development of technology, horizontal well drilling has developed on a large scale, and horizontal well development has become an effective means to improve the single well production of oil wells. However, with the extension of development time, the water content rises rapidly in the development process, and the oil well water appears. After the oil well water appears, the productivity decreases rapidly, which seriously affects the normal productivity of the horizontal well. In order to restore the productivity of the oil well, it is necessary to find out the water outlet position, so as to effectively carry out water plugging measures.

[0003] At present, the wellhead pressure of some horizontal wells is high after water appears, the horizontal well drag water testing pipe column adopts conventional tubing to connect the packer into the well, and the packer is dragged from the toe to the heel to seal one by one, and the water layer section is judged by ground measurement, but the pipe column cannot realize pressure operation, and there is a safety and environmental protection risk in the process of pipe column lifting, and the conventional tubing into the well is not stable, and the drill is easy to cause the failure of the packer. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing horizontal well coiled tubing drag water pipe column, which solves the problems of wellhead pressure safety and environmental protection risk and unstable well entry in the prior art.

[0005] The utility model adopts the technical scheme, horizontal well coiled tubing drag water pipe column, including sleeve, water finding pipe column assembly and coiled tubing are sequentially arranged in the sleeve from the toe end to the heel of horizontal section, water finding pipe column assembly and coiled tubing are connected through coiled tubing connector, and the end of coiled tubing that extends out of the sleeve is also provided with a blowout preventer assembly.

[0006] The utility model has the characteristics that:

[0007] The water finding pipe column assembly includes a connecting pipe and a series of oil pipe centralizers, pressure guide sand blasters, packers and pressure gauges arranged on the connecting pipe, and the pressure gauges are arranged at the toe end of the sleeve horizontal section of the water finding pipe column assembly.

[0008] The blowout preventer assembly includes a large-diameter cross, a coiled tubing blowout preventer and a coiled tubing injection head arranged at the end of the coiled tubing that extends out of the sleeve, and the large-diameter cross, the coiled tubing blowout preventer and the coiled tubing injection head are sequentially arranged along the direction of the coiled tubing extending out of the sleeve.

[0009] The coiled tubing connector is a coiled tubing joint or a coiled tubing release.

[0010] The coiled tubing connector is connected with the water finding pipe column assembly and the coiled tubing through threads.

[0011] The large-diameter four-way cross and the coiled tubing are connected through threads.

[0012] The packer is connected in series on the connection tubing between the pressure gauge and the pressure-guided sand blaster.

[0013] The horizontal well coiled tubing dragging water finding pipe column of the utility model has the technical features of coiled tubing, large-diameter four-way cross and coiled tubing blowout preventer, improves the problem of unstable tubing into the well in the prior art, can effectively solve the safety and environmental protection risk of high-pressure water-bearing wells, can improve the packer setting qualification rate, and further shortens the water finding period. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The horizontal well coiled tubing dragging water finding pipe column structure of the utility model.

[0015] In the figure: 1. pressure gauge, 2. spacer, 3. pressure-guided sand blaster, 4. tubing centralizer, 5. coiled tubing connector, 6. coiled tubing, 7. casing, 8. large-diameter four-way cross, 9. coiled tubing blowout preventer, 10. coiled tubing injection head, 11. connection tubing, 12. water finding pipe column assembly, 13. blowout prevention assembly. DETAILED DESCRIPTION

[0016] The utility model will be described in detail in combination with the drawings and specific embodiments.

[0017] The horizontal well coiled tubing dragging water finding pipe column of the utility model has the technical features of coiled tubing, large-diameter four-way cross and coiled tubing blowout preventer, improves the problem of unstable tubing into the well in the prior art, can effectively solve the safety and environmental protection risk of high-pressure water-bearing wells, can improve the packer setting qualification rate, and further shortens the water finding period. Figure 1 As shown in the figure, the horizontal well coiled tubing dragging water finding pipe column of the utility model comprises a casing 7, and a water finding pipe column assembly 12 and a coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel part, the water finding pipe column assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the connection mode in this place can be thread connection or other connection modes. The coiled tubing 6 is further provided with a blowout prevention assembly 13 at the end of the casing 7. In the utility model, the water finding pipe column assembly 12 and the blowout prevention assembly 13 are arranged, the water finding pipe column assembly 12 comprises connection tubing 11 and a pressure gauge 1, a packer 2, a pressure-guided sand blaster 3 and a tubing centralizer 4 sequentially arranged on the connection tubing 11, and the pressure gauge 1 is arranged at the toe end of the horizontal section of the casing 7 in the water finding pipe column assembly 12. It is mainly used for water finding test, the pressure gauge 1 is used for testing the downhole pressure of the lower part of the packer 2, after the test is completed, the coiled tubing dragging water finding pipe column is pulled out under pressure, the liquid volume at the well mouth is judged, the liquid production of each section and water content are calculated by the decrement method, and the water layer section is comprehensively identified in combination with the test data of the pressure gauge 1; the blowout prevention assembly 13 comprises a large-diameter four-way cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 arranged at the end of the coiled tubing 6 extending out of the casing 7, and the large-diameter four-way cross 8, the coiled tubing blowout preventer 9 and the coiled tubing injection head 10 are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0018] The coiled tubing connector 5 is a coiled tubing joint or a coiled tubing release.

[0019] The large-diameter cross 8 is connected with the coiled tubing 6 by screwing.

[0020] Embodiment 1:

[0021] The horizontal well coiled tubing drag water-finding pipe string comprises a casing 7, a water-finding pipe string assembly 12 and a coiled tubing 6 arranged in the casing 7 from the toe end of the horizontal section to the heel, the water-finding pipe string assembly 12 and the coiled tubing 6 are connected by a coiled tubing connector 5, and a blowout preventer 13 is arranged at the end of the coiled tubing 6 extending out of the casing 7.

[0022] Embodiment 2:

[0023] The horizontal well coiled tubing drag water-finding pipe string comprises a casing 7, a water-finding pipe string assembly 12 and a coiled tubing 6 arranged in the casing 7 from the toe end of the horizontal section to the heel, the water-finding pipe string assembly 12 and the coiled tubing 6 are connected by a coiled tubing connector 5, and a blowout preventer 13 is arranged at the end of the coiled tubing 6 extending out of the casing 7. The water-finding pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure-guided sand blaster 3, a packer 2 and a pressure gauge 1 arranged on the connecting tubing 11 in sequence, and the pressure gauge 1 is arranged at the toe end of the water-finding pipe string assembly 12 towards the horizontal section of the casing 7.

[0024] Embodiment 3:

[0025] The horizontal well coiled tubing drag water-finding pipe string comprises a casing 7, a water-finding pipe string assembly 12 and a coiled tubing 6 arranged in the casing 7 from the toe end of the horizontal section to the heel, the water-finding pipe string assembly 12 and the coiled tubing 6 are connected by a coiled tubing connector 5, and a blowout preventer 13 is arranged at the end of the coiled tubing 6 extending out of the casing 7. The water-finding pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure-guided sand blaster 3, a packer 2 and a pressure gauge 1 arranged on the connecting tubing 11 in sequence, and the pressure gauge 1 is arranged at the toe end of the water-finding pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 arranged at the end of the coiled tubing 6 extending out of the casing 7, and the large-diameter cross 8, the coiled tubing blowout preventer 9 and the coiled tubing injection head 10 are arranged in sequence along the direction of the coiled tubing 6 extending out of the casing 7.

[0026] Embodiment 4:

[0027] The horizontal well coiled tubing dragging water detecting pipe string comprises a casing 7, a coiled tubing 6 and a water detecting pipe string assembly 12, the water detecting pipe string assembly 12 and the coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detecting pipe string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the coiled tubing 6 is further provided with a blowout preventer 13 at the end of the casing 7. The water detecting pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 which are sequentially arranged on the connecting tubing 11, and the pressure gauge 1 is arranged at the toe end of the water detecting pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 which are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0028] The coiled tubing connector 5 in the horizontal well coiled tubing dragging water detecting pipe string is a coiled tubing joint.

[0029] Example 5

[0030] The horizontal well coiled tubing dragging water detecting pipe string comprises a casing 7, a coiled tubing 6 and a water detecting pipe string assembly 12, the water detecting pipe string assembly 12 and the coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detecting pipe string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the coiled tubing 6 is further provided with a blowout preventer 13 at the end of the casing 7. The water detecting pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 which are sequentially arranged on the connecting tubing 11, and the pressure gauge 1 is arranged at the toe end of the water detecting pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 which are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0031] The coiled tubing connector 5 in the horizontal well coiled tubing dragging water detecting pipe string is a coiled tubing joint.

[0032] Example 6

[0033] The horizontal well coiled tubing dragging water detection string comprises a casing 7, a water detection string assembly 12 and a coiled tubing 6 arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detection string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and a blowout preventer 13 is arranged at the end of the coiled tubing 6 extending out of the casing 7. The water detection string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 arranged on the connecting tubing 11 in sequence, and the pressure gauge 1 is arranged at the toe end of the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 arranged at the end of the coiled tubing 6 extending out of the casing 7, and the large-diameter cross 8, the coiled tubing blowout preventer 9 and the coiled tubing injection head 10 are arranged in sequence along the direction of the coiled tubing 6 extending out of the casing 7.

[0034] In the horizontal well coiled tubing dragging water detection string, the coiled tubing connector 5 is a coiled tubing release hand. The coiled tubing release hand is connected with the water detection string assembly 12 and the coiled tubing 6 through threads.

[0035] Example 7

[0036] The horizontal well coiled tubing dragging water detection string comprises a casing 7, a water detection string assembly 12 and a coiled tubing 6 arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detection string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and a blowout preventer 13 is arranged at the end of the coiled tubing 6 extending out of the casing 7. The water detection string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 arranged on the connecting tubing 11 in sequence, and the pressure gauge 1 is arranged at the toe end of the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 arranged at the end of the coiled tubing 6 extending out of the casing 7, and the large-diameter cross 8, the coiled tubing blowout preventer 9 and the coiled tubing injection head 10 are arranged in sequence along the direction of the coiled tubing 6 extending out of the casing 7.

[0037] In the horizontal well coiled tubing dragging water detection string, the coiled tubing connector 5 is a coiled tubing connector. The coiled tubing connector is connected with the water detection string assembly 12 and the coiled tubing 6 through threads.

[0038] Example 8

[0039] The horizontal well coiled tubing dragging water detecting pipe string comprises a casing 7, a coiled tubing 6 and a water detecting pipe string assembly 12, the water detecting pipe string assembly 12 and the coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detecting pipe string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the coiled tubing 6 is further provided with a blowout preventer 13 at the end of the casing 7. The water detecting pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 which are sequentially arranged on the connecting tubing 11, and the pressure gauge 1 is arranged at the toe end of the water detecting pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 which are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0040] In the horizontal well coiled tubing dragging water detecting pipe string, the coiled tubing connector 5 is a coiled tubing joint. The coiled tubing joint is connected with the water detecting pipe string assembly 12 and the coiled tubing 6 through threads at two ends. The large-diameter cross 8 is connected with the coiled tubing 6 through threads.

[0041] Example 9

[0042] The horizontal well coiled tubing dragging water detecting pipe string comprises a casing 7, a coiled tubing 6 and a water detecting pipe string assembly 12, the water detecting pipe string assembly 12 and the coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detecting pipe string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the coiled tubing 6 is further provided with a blowout preventer 13 at the end of the casing 7. The water detecting pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 which are sequentially arranged on the connecting tubing 11, and the pressure gauge 1 is arranged at the toe end of the water detecting pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 which are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0043] In the horizontal well coiled tubing dragging water detecting pipe string, the coiled tubing connector 5 is a coiled tubing joint. The coiled tubing joint is connected with the water detecting pipe string assembly 12 and the coiled tubing 6 through threads at two ends. The large-diameter cross 8 is connected with the coiled tubing 6 through threads.

[0044] Example 10

[0045] The horizontal well coiled tubing dragging water detecting pipe string comprises a casing 7, a coiled tubing 6 and a water detecting pipe string assembly 12, the water detecting pipe string assembly 12 and the coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detecting pipe string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the coiled tubing 6 is further provided with a blowout preventer 13 at the end of the casing 7. The water detecting pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 which are sequentially arranged on the connecting tubing 11, and the pressure gauge 1 is arranged at the toe end of the water detecting pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 which are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0046] In the horizontal well coiled tubing dragging water detecting pipe string, the coiled tubing connector 5 is a coiled tubing release hand. The coiled tubing release hand is connected with the water detecting pipe string assembly 12 and the coiled tubing 6 through threads. The large-diameter cross 8 is connected with the coiled tubing 6 through threads. The packer 2 is connected in series on the connecting tubing 11 between the pressure gauge 1 and the pressure guide sandblaster 3.

[0047] Embodiment 11

[0048] The horizontal well coiled tubing dragging water detecting pipe string comprises a casing 7, a coiled tubing 6 and a water detecting pipe string assembly 12, the water detecting pipe string assembly 12 and the coiled tubing 6 are sequentially arranged in the casing 7 from the toe end of the horizontal section to the heel, the water detecting pipe string assembly 12 and the coiled tubing 6 are connected through a coiled tubing connector 5, and the coiled tubing 6 is further provided with a blowout preventer 13 at the end of the casing 7. The water detecting pipe string assembly 12 comprises a connecting tubing 11, a tubing centralizer 4, a pressure guide sandblaster 3, a packer 2 and a pressure gauge 1 which are sequentially arranged on the connecting tubing 11, and the pressure gauge 1 is arranged at the toe end of the water detecting pipe string assembly 12 towards the horizontal section of the casing 7. The blowout preventer 13 comprises a large-diameter cross 8, a coiled tubing blowout preventer 9 and a coiled tubing injection head 10 which are sequentially arranged along the direction of the coiled tubing 6 extending out of the casing 7.

[0049] In the horizontal well coiled tubing dragging water detecting pipe string, the coiled tubing connector 5 is a coiled tubing release hand. The coiled tubing release hand is connected with the water detecting pipe string assembly 12 and the coiled tubing 6 through threads. The large-diameter cross 8 is connected with the coiled tubing 6 through threads. The packer 2 is connected in series on the connecting tubing 11 between the pressure gauge 1 and the pressure guide sandblaster 3.

[0050] The use process of the device of the utility model is explained as follows by the technical solutions in embodiment 11: the horizontal well continuous tubing drag water finding pipe column in the utility model is sequentially connected with pressure gauge 1, packer 2, pressure guide sand blaster 3, tubing centralizer 4, continuous tubing joint 5, continuous tubing 6, casing 7, large-diameter cross 8, continuous tubing blowout preventer 9 and continuous tubing injection head 10 from toe part to heel part of the horizontal section. Downhole, pressure gauge 1, packer 2, pressure guide sand blaster 3 and tubing centralizer 4 are sequentially connected by connecting tubing 11, and connecting tubing 11 is connected with continuous tubing 6 by means of combined connection of continuous tubing joint 5. At the wellhead, continuous tubing 6 is connected with large-diameter cross 8, large-diameter cross 8 is connected with continuous tubing blowout preventer 9, and continuous tubing blowout preventer 9 is connected with continuous tubing injection head 10. After the installation of the wellhead part is completed, wellhead sealing and pipe column pressure entry into the well can be realized. Continuous tubing 6 is connected with lower water finding pipe column assembly 12 into the well through continuous tubing joint 5, and after setting and sealing at the predetermined toe part test position, the liquid in the upper perforated section of packer 2 enters the continuous tubing through pressure guide sand blaster 3, the ground measures the liquid amount and analyzes the water content; pressure gauge 1 tests the pressure of the lower wellbore of packer 2. After the test of this section is completed, continuous tubing 6 is lifted to the next test position, and the above process is repeated. After the test is completed, the continuous tubing drag water finding pipe column assembly 12 is brought out under pressure, the liquid amount at the wellhead is judged, the liquid production of each section is calculated by the decrement method, and the water content is calculated, and the water layer section is comprehensively identified in combination with the test data of pressure gauge 1.

Claims

1. A water-finding string for use with coiled tubing in a horizontal well, the string comprising, The casing (7) is provided with a water-finding string assembly (12) and a coiled tubing (6) from toe end of horizontal section to heel, the water-finding string assembly (12) and the coiled tubing (6) are connected by a coiled tubing connector (5), the coiled tubing (6) is provided with a blowout preventer (13) at the end of the casing (7); The water-finding string assembly (12) comprises a connecting tubing (11), a tubing centralizer (4), a pressure-guided sand blaster (3), a packer (2) and a pressure gauge (1) arranged on the connecting tubing (11) in sequence, the pressure gauge (1) is arranged at the toe end of the water-finding string assembly (12) towards the horizontal section of the casing (7); The blowout preventer (13) comprises a large-diameter cross (8), a coiled tubing blowout preventer (9) and a coiled tubing injector (10) arranged at the end of the coiled tubing (6) extending out of the casing (7), the large-diameter cross (8), the coiled tubing blowout preventer (9) and the coiled tubing injector (10) are arranged in sequence along the direction of the coiled tubing (6) extending out of the casing (7).

2. The coiled tubing swabbing water-finding string for horizontal wells of claim 1, wherein, The coiled tubing connector (5) is a coiled tubing joint or a coiled tubing release.

3. The coiled tubing swab string for horizontal wells of claim 1, wherein, The coiled tubing connector (5) is connected with the water-finding string assembly (12) and the coiled tubing (6) by threads at both ends.

4. The coiled tubing swab string for horizontal wells of claim 1, wherein, The large-diameter cross (8) is connected with the coiled tubing (6) by threads.

5. The coiled tubing swab string of claim 4, wherein, The packer (2) is connected in series on the connecting tubing (11) between the pressure gauge (1) and the pressure-guided sand blaster (3).

Images