CN113482570B - Construction process capable of repeatedly using well cementation casing pipe - Google Patents

Construction process capable of repeatedly using well cementation casing pipe Download PDF

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Publication number
CN113482570B
CN113482570B CN202110778573.7A CN202110778573A CN113482570B CN 113482570 B CN113482570 B CN 113482570B CN 202110778573 A CN202110778573 A CN 202110778573A CN 113482570 B CN113482570 B CN 113482570B
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China
Prior art keywords
sleeve
drill rod
pipe
hole
bedrock
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CN202110778573.7A
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CN113482570A (en
Inventor
王锴
雷亚萍
杨斌
王旭
徐志远
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China Coal Geological Administration Third Hydrogeological Team
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China Coal Geological Administration Third Hydrogeological Team
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
    • E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to the field of regional control drilling, in particular to a construction process capable of repeatedly using a well cementation casing. The construction process of the recyclable well cementation casing comprises the following steps: step one, opening a sleeve next; step two, setting a sleeve; step three, pulling up the second sleeve; step four, pulling up the sleeve; and step five, after the casing pipe is pulled out, sealing the whole hole section by adopting cement paste. The advantages are that: the problem that the sleeve can not be reused is solved, the condition that the sleeve at the whole hole section can not be recovered due to the fact that the position of the lower portion of the sleeve is not aligned to the time can be avoided, resource waste is avoided, and project operation cost is reduced.

Description

Construction process capable of repeatedly using well cementation casing pipe
Technical Field
The invention relates to the field of regional control drilling, in particular to a construction process capable of repeatedly using a well cementation casing.
Background
In the existing traditional area management, the construction of a main hole adopts a full well cementation construction mode that lower multi-stage casing cement slurry returns to the ground, and after the construction is finished, the casing does not play other roles, so that resource waste is easily caused, and the project operation cost is increased; in addition, once the setting position under the casing is not aligned, the casing at the whole hole section cannot be recovered, so that great economic loss is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction process capable of repeatedly utilizing a well cementation casing, and effectively overcoming the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a construction process capable of repeatedly using a well cementation casing comprises the following steps:
step one, next sleeve opening, which comprises the following steps:
s1, a through hole device is used for testing, so that through drilling is ensured, and a lower pipe is unobstructed;
s2, welding the water stopper on the upper part of the rotational flow nipple, and installing a positive and negative joint which is fixed with a left-hand thread joint of the water stopper;
s3, sequentially lowering the casing string, and grouting into the casing and the drill rod in the pipe lowering and pipe conveying processes to ensure that the non-grouting section is not more than 200 meters;
s4, after the sleeve is conveyed to the bottom of the hole, the pipe conveyor is opened in a forward rotation mode, and the drill rod is pulled out;
s5, a drill rod is put in, the sleeve is filled with washing liquid and then is well buckled with the water stopper, and a pipe wrench is used for screwing;
s6, starting a pump to circulate to ensure smooth circulation;
s7, grouting and sealing holes, namely, firstly injecting clear water as a pad fluid; then injecting the cement paste which is prepared in advance according to the calculated amount; then, injecting displacement liquid according to the calculated amount to displace and clean cement slurry in the drill rod;
s8, after the water stopper is confirmed to be normally closed, the positive and negative connectors of the water stopper are opened in a positive rotation mode, the water stopper is lifted for 5-10m, and the pump is started to circularly clean the drill rod and the mud pump;
s9, waiting for coagulation, and checking hole sealing quality;
s10, after the well cementation is finished, fixing an open sleeve on the ground part by using a steel wire rope, and covering the annular space part of the wellhead;
step two, setting a second open casing, starting second open drilling after three days of waiting for setting after the first open casing cementing is finished, and setting the second open casing according to the method of the step one after the second open drilling is finished, wherein the following casings of the bedrock and the casings above the bedrock adopt opposite threaded interfaces:
step three, pulling up the second sleeve, which comprises the following steps:
s11, after the engineering construction is finished, starting a pump to circulate to ensure smooth circulation;
s12, sealing the two sleeves below the bedrock and the horizontal section by using cement slurry in a slurry return hole sealing mode to prevent water gushing during pulling the sleeves;
s13, detaching a steel wire rope for fixing the two-way sleeve, connecting the drill rod with the top of the two-way sleeve, and rotating the drill rod along the thread direction of the part above the two-way sleeve bedrock to enable the drill rod to drive the two-way sleeve to rotate and separate the two-way sleeve part at the top interface of the bedrock;
s14, lifting the second sleeve by adopting a drilling mode;
step four, pulling out the sleeve, which comprises the following steps:
and S15, after the engineering construction is finished, a drill rod is put in, and the pump is started to circulate, so that the circulation is smooth.
S16, detaching a steel wire rope for fixing an opening sleeve, connecting the drill rod with the top of the opening sleeve, and rotating the drill rod along the thread direction of the upper part of the opening sleeve bedrock to enable the drill rod to drive the sleeve to rotate and enable the sleeve part at the interface of the top of the bedrock to be separated;
and S17, lifting the sleeve by adopting a drilling mode.
And step five, after the casing pipe is pulled out, sealing the whole hole section by adopting cement paste.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, in the step S1, the pipe is firstly tested by the through hole device, if the test process is smooth, the pipe directly falls to the bottom of the hole, if the pipe is blocked, the pipe is lifted for 1-2m, pumped and circulated, and positively rotated to sweep the hole, and after the pipe smoothly passes through the hole, the pipe is lifted and swept again, and the pipe is repeatedly lifted, pumped and circulated, and positively rotated to sweep the hole for multiple times to ensure that the pipe is not blocked.
Further, in the above S7, the specific gravity of the cement paste is not less than 1.65.
Further, in the above S12, the specific gravity of the cement paste is not less than 1.65.
Further, in the fifth step, the specific gravity of the cement paste is not less than 1.65.
The invention has the beneficial effects that: the problem that the sleeve can not be reused is solved, the condition that the sleeve at the whole hole section can not be recovered due to the fact that the position of the lower portion of the sleeve is not aligned to the time can be avoided, resource waste is avoided, and project operation cost is reduced.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example (b): the construction process of the recyclable well cementation casing pipe is characterized by comprising the following steps:
firstly, drilling to a bedrock more than 20m, and then, setting an open sleeve, wherein the sleeve below the bedrock and the sleeve above the bedrock adopt opposite threaded interfaces, and the method comprises the following specific steps:
s1, firstly, testing (descending) a hole penetrating device, if the testing process is smooth, directly descending to the bottom of the hole, if the testing process is smooth, lifting for 1-2m, pumping for circulation, positively sweeping the hole, after the hole smoothly passes through, lifting again, and sweeping the hole again, and repeating the steps for multiple times to ensure that the descending of the hole is not blocked;
s2, welding the water stopper on the upper part of the rotational flow nipple, installing a positive and negative joint, and fixing the positive and negative joint and the left-hand thread joint of the water stopper in a spot welding manner;
s3, sequentially descending a casing string, and injecting slurry into the casing and the drill rod in the pipe descending and conveying processes to ensure that the slurry-free section is not more than 200 meters, wherein the casing string comprises a rotational flow short joint, a water stopper, a casing, a pipe conveying device and a drill rod;
s4, after the sleeve is conveyed to the bottom of the hole, the pipe conveyor is opened in a forward rotation mode, and the drill rod is lifted out;
s5, a drill rod is put in, the sleeve is filled with washing liquid and then is well buckled with the water stopper, and a pipe wrench is used for screwing;
s6, starting a pump to circulate to ensure smooth circulation;
s7, grouting and sealing holes, namely injecting 2m 3 The clear water is used as a pre-solution; then injecting the cement paste with the specific gravity not less than 1.65 (namely the cement paste density is 1.65 g/cm) 3 The above); then, injecting displacement liquid according to the calculated amount to displace and clean cement slurry in the drill rod;
s8, after the water stopper is confirmed to be normally closed, the water stopper is rotated forward to open the forward and reverse connectors of the water stopper, the water stopper is lifted for 5-10m, and the pump is started to circularly clean the drill rod and the mud pump;
s9, after waiting for solidification for 72 hours, checking the hole sealing quality;
s10, after the well cementation is finished, fixing an open sleeve on the ground part by using a steel wire rope, and covering the annular space part of the wellhead;
step two, setting a second open casing, starting second open drilling after three days of waiting for setting after the first open casing cementing is finished, and setting the second open casing according to the method of the step one after the second open drilling is finished, wherein the following casings of the bedrock and the casings above the bedrock adopt opposite threaded interfaces, and the method comprises the following specific steps:
firstly, testing a second drilled hole by using a hole penetrating device, directly descending to the bottom of the second drilled hole if the test process is smooth, lifting for 1-2m if the test process is blocked, performing pump circulation and forward rotation hole sweeping, lifting again after the second drilled hole passes through the hole smoothly, and then sweeping the hole again, wherein the repeated lifting, pump circulation and forward rotation hole sweeping ensure that a lower pipe is not blocked repeatedly;
welding a water stopper on the upper part of the rotational flow short section, installing a positive and negative joint, and fixing the positive and negative joint and the left-hand thread joint of the water stopper in a spot welding manner;
sequentially feeding a casing string, and injecting slurry into a double-opening casing and a drill rod in the pipe feeding and conveying processes to ensure that a slurry-free section is not more than 200m, wherein the double-opening casing string comprises a rotational flow short section, a water stopper, a casing, a pipe conveyor and a drill rod;
after the second casing pipe is conveyed to the bottom of the hole, the pipe conveying device is opened in a forward rotation manner, and the drill rod is lifted out;
a drill rod is put in, the second sleeve is filled with washing liquid and then is well buckled with the water stopper, and a pipe wrench is used for screwing;
the pump is started to circulate, so that the circulation is ensured to be smooth;
grouting for sealing holes, namely injecting 2m of cement into the hole firstly 3 The clear water is used as the pre-solution; then injecting cement slurry with the specific gravity not less than 1.65 which is prepared in advance according to the calculated amount; then injecting displacement liquid according to the calculated amount to displace and clean the cement slurry in the drill rod;
after the water stopper is confirmed to be normally closed, the positive and negative connectors of the water stopper are opened in a positive rotation mode, the water stopper is lifted for 5-10m, and the pump is started to circularly clean the drill rod and the mud pump;
after waiting for coagulation for 72 hours, checking the hole sealing quality;
after the well cementation is finished, the steel wire rope is used for fixing the part, located on the ground, of the double-opening sleeve and covering the annular space part of the wellhead
Step three, pulling up the second sleeve, which comprises the following steps:
s11, after the engineering construction is finished, starting a pump to circulate to ensure smooth circulation;
s12, sealing the two-way casing pipe below the bedrock and the horizontal section by cement paste with the specific gravity not less than 1.65 by adopting a slurry return hole sealing mode to prevent water gushing during casing pipe pulling;
s13, detaching a steel wire rope for fixing the two-way sleeve, connecting the drill rod with the top of the two-way sleeve, and rotating the drill rod along the thread direction of the part above the two-way sleeve bedrock to enable the drill rod to drive the two-way sleeve to rotate and separate the two-way sleeve part at the top interface of the bedrock;
s14, lifting the second sleeve by adopting a drill tripping mode, wherein the drill tripping mode is a conventional technology;
step four, pulling up the sleeve to be opened, which comprises the following specific steps:
and S15, after the engineering construction is finished, a drill rod is put in, and the pump is started to circulate, so that the circulation is smooth.
S16, detaching a steel wire rope for fixing an opening sleeve, connecting the drill rod with the top of the opening sleeve, and rotating the drill rod along the thread direction of the upper part of the opening sleeve bedrock to enable the drill rod to drive the sleeve to rotate and enable the sleeve part at the interface of the top of the bedrock to be separated;
and S17, lifting the one-opening sleeve by adopting a drilling mode, wherein the drilling mode is a conventional technology.
And step five, after the casing pipe is pulled out, adopting cement paste with the specific gravity not less than 1.65 to seal the whole hole section.
The beneficial effects of this embodiment are as follows:
(1) The process is simple to operate and easy to apply in actual construction;
(2) The resources are saved, the resource waste is avoided, and the greater social benefit is generated;
(3) The sleeve is repeatedly utilized, the operation cost is reduced, and great economic benefits are generated.
(4) The fault tolerance rate of the lower staggered position of the casing is increased, and resource waste is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (5)

1. A construction process capable of repeatedly using a well cementation sleeve is characterized by comprising the following steps:
step one, next sleeve opening, which comprises the following steps:
s1, a through hole device is used for testing, so that through drilling is ensured, and a lower pipe is unobstructed;
s2, welding the water stopper on the upper part of the rotational flow nipple, and installing a positive and negative joint which is fixed with a left-hand thread joint of the water stopper;
s3, sequentially lowering the casing string, and grouting the casing and the drill rod in the pipe lowering and conveying processes to ensure that the non-grouting section does not exceed 200 m;
s4, after the sleeve is conveyed to the bottom of the hole, the pipe conveyor is opened in a forward rotation mode, and the drill rod is lifted out;
s5, a drill rod is put in, after the sleeve is filled with flushing liquid, the drill rod and the water stopper are well buckled, and a pipe wrench is used for screwing;
s6, starting a pump to circulate to ensure smooth circulation;
s7, grouting and sealing holes, namely, firstly injecting clear water as a pad fluid; then injecting the cement paste which is prepared in advance according to the calculated amount; then injecting displacement liquid according to the calculated amount to displace and clean the cement slurry in the drill rod;
s8, after the water stopper is confirmed to be normally closed, the positive and negative joints of the water stopper are opened in a positive rotation mode, the water stopper is lifted for 5-10m, and the pump is started to circularly clean the drill rod and the mud pump;
s9, waiting for coagulation, and checking hole sealing quality;
s10, after the well cementation is finished, fixing an open sleeve on the ground part by using a steel wire rope, and covering the annular space part of the wellhead;
step two, setting a second sleeve, starting second drilling after waiting for three days after the first sleeve is cemented, and setting the second sleeve according to the method in the step one after the second drilling is finished, wherein the following sleeves of the bedrock and the sleeves above the bedrock adopt opposite threaded interfaces:
step three, pulling up the second sleeve, which comprises the following steps:
s11, after the engineering construction is finished, starting a pump to circulate to ensure smooth circulation;
s12, sealing the two sleeves below the bedrock and the horizontal section by using cement slurry in a slurry return hole sealing mode to prevent water gushing during pulling the sleeves;
s13, detaching a steel wire rope for fixing the two-way sleeve, connecting the drill rod with the top of the two-way sleeve, and rotating the drill rod along the thread direction of the part above the two-way sleeve bedrock to enable the drill rod to drive the two-way sleeve to rotate and separate the two-way sleeve part at the top interface of the bedrock;
s14, lifting the second sleeve by adopting a drilling mode;
step four, pulling up the sleeve to be opened, which comprises the following specific steps:
s15, after the engineering construction is finished, a drill rod is put in, and a pump is started to circulate, so that the circulation is smooth;
s16, detaching a steel wire rope for fixing an open sleeve, connecting the drill rod with the top of the open sleeve, and rotating the drill rod along the thread direction of the upper part of the open sleeve bedrock to enable the drill rod to drive the sleeve to rotate and separate the sleeve part at the interface of the top of the bedrock;
s17, lifting an open sleeve in a drilling mode;
and step five, after the casing pipe is pulled out, sealing the whole hole section by adopting cement paste.
2. The construction process of a reusable cementing casing according to claim 1, characterized in that: in the S1, a through hole device is used for trial, if the trial process is smooth, the pipe is directly put to the bottom of the hole, if the trial process is blocked, the pipe is lifted for 1-2m, pumped for circulation and forward rotation hole sweeping are carried out, the pipe is lifted and swept again after the pipe passes through the hole smoothly, and the pipe is lifted, pumped for circulation and forward rotation hole sweeping repeatedly for multiple times to ensure that the pipe is not blocked.
3. The construction process of a reusable cementing casing according to claim 1, characterized in that: in S7, the specific gravity of the cement paste is not less than 1.65.
4. The construction process of the reusable well cementation casing according to claim 1, characterized in that: in S12, the specific gravity of the cement paste is not less than 1.65.
5. The construction process of a reusable cementing casing according to claim 1, characterized in that: in the fifth step, the specific gravity of the cement paste is not less than 1.65.
CN202110778573.7A 2021-07-09 2021-07-09 Construction process capable of repeatedly using well cementation casing pipe Active CN113482570B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979816A (en) * 2010-09-17 2011-02-23 北京奥瑞安能源技术开发有限公司 Coal bed gas horizontal well and drainage-mining straight well combined well drilling construction method
CN103982154A (en) * 2014-05-14 2014-08-13 新奥气化采煤有限公司 Well casing recovery method
CN107724981A (en) * 2017-09-28 2018-02-23 中国煤炭地质总局水文地质局 A kind of new is pulled out sleeve pipe method for sealing
CN108894766A (en) * 2018-08-27 2018-11-27 北京博锐新能科技有限公司 A kind of straight well structure and casing recovery method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979816A (en) * 2010-09-17 2011-02-23 北京奥瑞安能源技术开发有限公司 Coal bed gas horizontal well and drainage-mining straight well combined well drilling construction method
CN103982154A (en) * 2014-05-14 2014-08-13 新奥气化采煤有限公司 Well casing recovery method
CN107724981A (en) * 2017-09-28 2018-02-23 中国煤炭地质总局水文地质局 A kind of new is pulled out sleeve pipe method for sealing
CN108894766A (en) * 2018-08-27 2018-11-27 北京博锐新能科技有限公司 A kind of straight well structure and casing recovery method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
拔套管作业机及其应用;张鹏吉等;《石油机械》;19970130(第01期);全文 *

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