CN-121993061-A - Coalbed methane screen pipe horizontal well blocking removing equipment, method and device and electronic equipment

CN121993061ACN 121993061 ACN121993061 ACN 121993061ACN-121993061-A

Abstract

The embodiment of the invention relates to a plugging removing device, a plugging removing method, a plugging removing device and an electronic device for a coal bed methane screen pipe horizontal well, wherein the plugging removing device for the coal bed methane screen pipe horizontal well comprises an ejector, an upper centralizer and a screw; one end of the screw rod is connected to one end of the ejector through the upper centralizer, the screw rod rotates to drive the ejector to rotate, the other end of the screw rod is connected to a pump truck sequentially through an oil pipe and a high-pressure hose, a sleeve is arranged on the outer side of the oil pipe, an oil sleeve annulus sleeve gate is arranged between the oil pipe and the sleeve, the pump truck is used for providing blocking removing liquid, namely, the screw rod rotates to drive the ejector to rotate and hydraulically jet on the horizontal section of the coal bed gas sieve tube horizontal well, the blocking of the horizontal section is removed, and the yield of the coal bed gas well is improved.

Inventors

WANG QI
ZHANG CONG
JIA HUIMIN
HU QIUJIA
LIU CHUNCHUN
Cui xinrui
SANG GUANGJIE
HE SHAN

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

1. The blockage removing device for the horizontal well of the coalbed methane sieve tube is characterized by comprising an ejector, an upper centralizer and a screw; one end of the screw rod is connected to one end of the ejector through the upper centralizer, and the screw rod rotates to drive the ejector to rotate; The other end of the screw rod is connected to a pump truck through an oil pipe and a high-pressure hose in sequence, a sleeve is arranged on the outer side of the oil pipe, an oil sleeve annulus sleeve gate is arranged between the oil pipe and the sleeve, and the pump truck is used for providing blocking removal liquid.
2. The apparatus of claim 1, wherein the injector comprises at least one first nozzle embedded vertically and at least one second nozzle embedded diagonally.
3. The apparatus of claim 2 wherein the at least one first nozzle is arranged in at least one group along the injector axis, each group comprising a plurality of first nozzles arranged along the injector circumference, and the at least one second nozzle is arranged along the injector circumference.
4. The apparatus of claim 3, wherein the first nozzle comprises a first input port and a first output port, the first output port being elliptical in shape with a length that coincides with the direction of extension of the horizontal well, the cross-sectional area of the first input port being greater than the cross-sectional area of the first output port; the second nozzle includes a second input port and a second output port, the second input port having a cross-sectional area greater than a cross-sectional area of the second output port.
5. The apparatus according to any one of claims 1-4, wherein the other end of the injector is connected to the milling tool via a connector, and wherein rotation of the screw rotates the milling tool.
6. The method for removing the blockage of the horizontal well of the coalbed methane screen pipe is characterized by comprising the following steps of: S1, determining a target injection section of a target coalbed methane screen pipe horizontal well, and determining a first target construction parameter and a second target construction parameter; S2, after the coalbed methane screen pipe horizontal well plugging removal device according to any one of claims 1-5 is lowered to a target injection section, controlling an oil sleeve annulus sleeve gate to be opened, and injecting plugging removal liquid of a pump truck into the coalbed methane screen pipe horizontal well plugging removal device through an oil pipe according to the first target construction parameter so as to drive the screw rod to rotate; s3, controlling the oil sleeve annulus sleeve gate to be closed, injecting the unblocking liquid of the pump truck into the stratum through the oil pipe according to the second target construction parameter, and controlling the oil sleeve annulus sleeve gate to be opened for open-flow; And S4, repeatedly executing the steps S2 and S3 for preset times to finish the unblocking of the target injection section.
7. The method of claim 6, wherein the first target construction parameter comprises at least one of a first target construction pressure, a first target construction displacement, and a first target injection amount, and the second target construction parameter comprises at least one of a second target construction pressure, a second target construction displacement, and a second target injection amount, each of the first and second target construction pressures being greater than a formation fracture pressure; Injecting the plugging removing liquid of the pump truck into the plugging removing device of the coalbed methane screen pipe horizontal well through the oil pipe according to the first target construction parameter in the step S2, wherein the plugging removing device comprises: Under the first target construction pressure and the first target construction displacement, the blocking removing liquid in the pump truck is injected into the blocking removing device of the coalbed methane sieve tube horizontal well through the oil pipe until the first target injection amount is reached or the pulverized coal content in the ground return liquid is lower than a preset value; And injecting the unblocking liquid of the pump truck into the stratum through the oil pipe according to the second target construction parameter in the step S3, wherein the step comprises the following steps: And injecting the unblocking liquid in the pump truck into the stratum through the oil pipe under the second target construction pressure and the second target construction displacement until the second target injection liquid amount is reached or the stratum fracture pressure is reached.
8. The method of claim 6 or 7, wherein the determining the target injection section of the target coal seam screen horizontal well comprises: Determining at least one target injection section of a target coal seam screen horizontal well; The method further comprises the steps of: And (2) for each target injection end, executing the steps S2-S4 according to the sequence from near to far of lowering the coalbed methane screen pipe horizontal well blocking remover to the target injection section.
9. The blocking remover for the horizontal well of the coalbed methane sieve tube is characterized by comprising a well selecting module, a setting module and a blocking removing module; The well selecting module is used for determining a target injection section of a target coalbed methane screen pipe horizontal well; the setting module is used for determining a first target construction parameter and a second target construction parameter; the blocking removal module is used for executing the steps S2-S4, Wherein S2 comprises controlling the opening of an oil sleeve annulus sleeve gate after lowering the coalbed methane screen horizontal well plugging removal device according to any one of claims 1-5 to a target injection section, injecting plugging removal liquid of a pump truck into the coalbed methane screen horizontal well plugging removal device through an oil pipe by using the first target construction parameter to drive the screw to rotate; s3, controlling the oil sleeve annulus sleeve gate to be closed, injecting the unblocking liquid of the pump truck into the stratum through the oil pipe according to the second target construction parameter, and controlling the oil sleeve annulus sleeve gate to be opened for open-flow; s4, repeatedly executing the steps S2 and S3 for preset times to finish the unblocking of the target injection section.
10. The electronic equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus; A memory for storing a computer program; A processor for performing the steps of the method for plugging removal of a coalbed methane screen horizontal well as defined in any one of claims 6 to 8 when executing a program stored on a memory.

Description

Coalbed methane screen pipe horizontal well blocking removing equipment, method and device and electronic equipment Technical Field The invention relates to the technical field of coalbed methane exploitation, in particular to blockage removal equipment, method and device for a coalbed methane screen pipe horizontal well and electronic equipment. Background The horizontal well of the L-shaped screen pipe of the coal bed gas is used as one of the main well types of coal bed gas middle and high permeability block exploitation, the well structure of the horizontal well is composed of a straight well section, a deflecting section and a horizontal section, the horizontal section is used as a production layer and is positioned in the coal bed, and the length of the horizontal section is 600-1000 m. In general, the horizontal end can carry out screen pipe well completion to strengthen the stability of the well wall, the arrangement of the screen pipe holes enables a production section shaft to be fully communicated with a natural crack system in a coal bed, so that the desorption range of coal bed gas is enlarged, and the breakthrough of the yield is achieved in the development of shallow coal bed gas with better permeability. However, the method is affected by serious pollution of a reservoir by drilling fluid, serious sand and coal ash production from a stratum, long drainage and production time, improvement of the later-period production degree of a gas well and the like, and the yield of part of the gas well is reduced, so that the efficient development of the coal bed gas field is restricted. In the related art, a technician performs hydraulic cutting on a coal bed at the horizontal section of a screen pipe horizontal well by installing a hydraulic spraying device at the lower part of a pipe column, so as to achieve the aim of removing the pollution of a near-wellbore zone. However, in practical situations, most of the fluid sprayed by the sprayer is blocked by the wall of the sieve tube, so that the fluid cannot effectively act on the coal bed, and the purposes of removing blockage and increasing yield cannot be achieved. Therefore, how to apply high-pressure jet flow to a screen horizontal well is a technical problem to be solved. Disclosure of Invention The embodiment of the invention provides blocking removing equipment, method and device for a coal bed gas sieve tube horizontal well and electronic equipment, and aims to solve the technical problem that blocking removing and yield increasing of the coal bed gas sieve tube horizontal well are difficult. According to the embodiment of the invention, the plugging removing equipment for the horizontal well of the coalbed methane screen pipe comprises an ejector, an upper centralizer and a screw, wherein one end of the screw is connected to one end of the ejector through the upper centralizer, the screw rotates to drive the ejector to rotate, the other end of the screw is connected to a pump truck sequentially through an oil pipe and a high-pressure hose, a sleeve is arranged on the outer side of the oil pipe, an oil sleeve annulus sleeve gate is arranged between the oil pipe and the sleeve, and the pump truck is used for providing plugging removing liquid. In some embodiments, the injector includes at least one first nozzle embedded vertically and at least one second nozzle embedded diagonally. In some embodiments, the at least one first nozzle is arranged in at least one group along the injector axis, each group comprising a plurality of first nozzles arranged along the injector circumference, and the at least one second nozzle is arranged along the injector circumference. In some embodiments, the first nozzle includes a first input port and a first output port, the first output port is elliptical, the length direction of the ellipse is consistent with the extending direction of the horizontal well, the cross-sectional area of the first input port is larger than the cross-sectional area of the first output port, and the second nozzle includes a second input port and a second output port, and the cross-sectional area of the second input port is larger than the cross-sectional area of the second output port. In some embodiments, the other end of the injector is connected with the milling tool through a connector, and the screw is rotated to drive the milling tool to rotate. The embodiment of the invention provides a method for removing blocking of a coal bed methane screen pipe horizontal well, which comprises the steps of S1, determining a target injection section of the target coal bed methane screen pipe horizontal well, determining a first target construction parameter and a second target construction parameter, S2, controlling an oil sleeve annular sleeve gate to be opened after the coal bed methane screen pipe horizontal well blocking removing device according to any one of claims 1-5 is lowered to the target injection section, injecting blocking removin