CN101824981A - Test string for stimulating produced liquid section of pumping unit - Google Patents

Abstract

The invention discloses a test string for stimulating the produced liquid section of a pumping unit, comprising a security core sleeve, a security upper joint, a security lower joint, a two-way anchor packer, a friction piece, a pull rod, a hollow-plunger pump, a piston rod, a hollow plunger and a horn mouth. The test string is characterized in that the security upper joint and the security lower joint are connected with an oil pipe through the security core sleeve, the security lower joint is connected with the two-way anchor packer, the friction piece is positioned on the centering device of the two-way anchor packer; the upper part of the pull rod is connected with the two-way anchor packer, the lower part thereof is connected with the piston rod through a box coupling, the bottom of the piston rod is connected with the horn mouth; the hollow-plunger pump is connected with the two-way anchor packer and drives the piston rod to vellicate up and down through the pull rod. Compared with the prior art, the invention has the advantages of simple structure, convenient use, low cost and ability of meeting construction requirements.

Description

Translated fromChinese

模拟抽油机产液剖面测试管柱Test pipe string for simulating liquid production profile of pumping unit

一、技术领域1. Technical field

本发明属于油井采油工艺测试工具技术领域，具体的讲是一种模拟抽油机产液剖面测试管柱。The invention belongs to the technical field of testing tools for oil production process in oil wells, in particular to a test string for simulating the liquid production profile of a pumping unit.

二、背景技术2. Background technology

油井在采油期间需要了解各种状况下井筒中油、气、水三相流态的产出情况，依据产液剖面测井资料调整开发方案，充分动用储量，封堵出水层位达到提高采收率，增产增效的目的。国内外在非自喷井产液剖面测井工艺方面主要有以下几种工艺：1、抽油机井环空测井方法：测井仪器只能从油套环形空间内下入，测井仪器外径、录取参数受到限制，同时由于测井过程中经常出现电缆缠绕在油管上或仪器卡在油套环形空间内的情况，测井成功率偏低。胜利油田近十年来几乎没有环空产液剖面测试。2、潜油电泵井测井方法：在油管底部接一个倒“Y”型接头，一端接潜油电泵，另一端接单向堵塞器，当需要测试时捞出单向堵塞器后进行井温、压力恢复测试。电泵及Y”型接头组件外径大，只能用于95/8″(245mm)套管，使用范围受到限制，目前国内中海油开展了此项工艺。3、双管柱测井方法：国外对于95/8″(245mm)套管悬挂51/2″(139.7mm)或7″(177.8mm)套管结构的油井，设置双管柱偏心井口，测试管柱下过抽油泵，在油井正常产液情况下，仪器由测试管柱内下至测量目的层段，进行产液剖面测试。产液剖面测井根据不同类型的油井生产情况采用不同的测井方式。During oil production, oil wells need to understand the production of oil, gas and water in the three-phase flow state of the wellbore under various conditions, adjust the development plan according to the logging data of the liquid production profile, fully utilize the reserves, and seal the water-producing layers to achieve enhanced recovery. , The purpose of increasing production and efficiency. At home and abroad, there are mainly the following technologies in the logging technology of the fluid production profile of the non-spontaneous well: 1. The annulus logging method of the pumping well: the logging instrument can only be lowered from the annular space of the oil casing, and The diameter and recording parameters are limited. At the same time, the logging success rate is low because the cable is often wound on the tubing or the instrument is stuck in the annular space of the oil casing during the logging process. In Shengli Oilfield, there has been almost no annular liquid production profile test in the past ten years. 2. Logging method for electric submersible pump wells: connect an inverted "Y" joint at the bottom of the tubing, connect one end to the electric submersible pump, and connect the other end to a one-way plug. When testing is required, take out the one-way plug and perform Well temperature and pressure recovery test. The outer diameter of the electric pump and Y"-shaped joint assembly is large, and it can only be used for 95/8" (245mm) casing, and the scope of application is limited. At present, China National Offshore Oil Corporation has carried out this process. 3. Double-string logging method: For foreign oil wells with 95/8″ (245mm) casing hanging 51/2″ (139.7mm) or 7″ (177.8mm) casing structure, set up double-string eccentric wellhead, test The pipe string is passed through the oil well pump, and under the condition of normal liquid production of the oil well, the instrument is lowered from the inside of the test pipe string to the measurement target layer to perform the liquid production profile test. The liquid production profile logging adopts different measuring methods according to the production conditions of different types of oil wells. well way.

油井生产管柱分为自喷井生产管柱和人工举升完井管柱(抽油机、潜油电泵、螺杆泵、射流泵完井管柱)。自喷井测试时可以从油管直接将仪器输送到目的层位进行测井；抽油机井测试时需要安装偏心井口，测井仪器在油套环形空间内测量。目前胜利油田自喷井很少，大部分采用抽油机和潜油电泵来进行生产的人工举升完井，其井况和生产实际无法使用产液剖面测井技术。Oil well production strings are divided into self-flowing well production strings and artificial lift completion strings (pumping units, electric submersible pumps, screw pumps, jet pump completion strings). During the self-flowing well test, the instrument can be directly transported from the tubing to the target layer for well logging; when the pumping well is tested, an eccentric wellhead needs to be installed, and the logging instrument measures in the annular space of the oil casing. At present, there are very few self-flowing wells in Shengli Oilfield, and most of them use pumping units and electric submersible pumps to carry out artificial lift completions for production. The well conditions and actual production cannot use liquid production profile logging technology.

随着水平井数量的迅速增加，对水平井在不停产的状况下进行产液剖面测井，可以对水平井实行动态监测，及时录取井筒中的油、气、水三相流体的关系、分层比例、单层产值、压力、含水等重要参数，为实现合理开采提供依据。对于水平井自喷井，产液剖面测试可以采用爬行器、绕性管等工艺将测井仪器穿过油管输送到目的层进行测试；胜利油田水平井具备自喷能力的井很少，大部分是采用潜油电泵或抽油机来进行生产的人工举升完井，测井仪器无法下入水平井段进行产液剖面测井。With the rapid increase in the number of horizontal wells, the horizontal wells can be dynamically monitored by performing liquid production profile logging under the condition of non-stop production, and the relationship and distribution of oil, gas, and water three-phase fluids in the wellbore can be recorded in time. Important parameters such as layer ratio, single-layer output value, pressure, water content, etc., provide a basis for realizing reasonable mining. For the self-flowing wells of horizontal wells, the fluid production profile test can use crawlers, coiled pipes and other techniques to transport the logging instruments through the tubing to the target layer for testing; there are few horizontal wells in Shengli Oilfield with self-flowing ability, and most It is an artificial lift completion that uses electric submersible pumps or pumping units for production, and logging instruments cannot be lowered into horizontal well sections for fluid production profile logging.

由于生产完井管柱的原因，国内开展非自喷井的产液剖面测井少，利用油井作业期间下测试管柱，进行直井、大斜度井、水平井的产液剖面测试是油田开发过程中急需。Due to the production and completion strings, there are few liquid production profile loggings for non-spontaneous wells in China. It is an important aspect of oilfield development to use test strings during oil well operations to test the fluid production profiles of vertical wells, highly deviated wells, and horizontal wells. Urgently needed in the process.

三、发明内容3. Contents of the invention

本发明的目的就是针对现有技术存在的缺陷，提供一种能满足施工需要的模拟抽油机产液剖面测试管柱。The object of the present invention is to provide a simulated oil pumping unit liquid production profile test pipe string that can meet the construction needs in view of the defects existing in the prior art.

其技术方案是：包括安全芯套、安全上接头、安全下接头、双向卡瓦封隔器、摩擦体、拉杆、空心柱塞泵、活塞杆、空心柱塞和喇叭口。所述安全上接头和安全下接头通过安全芯套与油管相连接，安全下接头与双向卡瓦封隔器相连接，摩擦体位于双向卡瓦封隔器的扶正器上；拉杆上部与双向卡瓦封隔器相连接，下部通过接箍与活塞杆相连接，活塞杆底部与喇叭口相连接；空心柱塞泵与双向卡瓦封隔器相连接，并通过拉杆带动活塞杆上下抽动。本发明与现有技术相比较，具有结构简单、使用方便、成本低廉且能满足施工需要的优点。The technical scheme is: including a safety core sleeve, a safety upper joint, a safety lower joint, a two-way slip packer, a friction body, a tie rod, a hollow plunger pump, a piston rod, a hollow plunger and a bell mouth. The upper safety joint and the lower safety joint are connected to the oil pipe through the safety core sleeve, the lower safety joint is connected to the two-way slip packer, the friction body is located on the centralizer of the two-way slip packer; the upper part of the tie rod is connected to the two-way slip packer The tile packer is connected, the lower part is connected with the piston rod through a collar, and the bottom of the piston rod is connected with the bell mouth; the hollow plunger pump is connected with the two-way slip packer, and the piston rod is driven up and down by the pull rod. Compared with the prior art, the present invention has the advantages of simple structure, convenient use, low cost and can meet construction requirements.

四、附图说明4. Description of drawings

附图是本发明一种实施例的结构示意图。Accompanying drawing is the structural representation of an embodiment of the present invention.

五、具体实施方式5. Specific implementation

如图1所示，一种模拟抽油机产液剖面测试管柱，包括安全芯套1、安全上接头2、安全下接头3、双向卡瓦封隔器4、摩擦体5、拉杆6、空心柱塞泵7、活塞杆8、空心柱塞9和喇叭口10.所述安全上接头2和安全下接头3通过安全芯套1与油管相连接，安全下接头3与双向卡瓦封隔器4相连接，摩擦体5位于双向卡瓦封隔器4的扶正器上；拉杆6上部与双向卡瓦封隔器4相连接，下部通过接箍与活塞杆8相连接，活塞杆8底部与喇叭口10相连接；空心柱塞泵7与双向卡瓦封隔器4相连接，并通过拉杆6带动活塞杆9上下抽动。As shown in Figure 1, a test string for simulating the fluid production profile of a pumping unit includes asafety core sleeve 1, a safety upper joint 2, a safetylower joint 3, a two-way slip packer 4, a friction body 5, atie rod 6,Hollow plunger pump 7,piston rod 8,hollow plunger 9 andbell mouth 10. The safety upper joint 2 and safetylower joint 3 are connected to the oil pipe through thesafety core sleeve 1, and the safetylower joint 3 is isolated from the two-way slips The friction body 5 is located on the centralizer of the two-way slip packer 4; the upper part of thetie rod 6 is connected with the two-way slip packer 4, the lower part is connected with thepiston rod 8 through a collar, and the bottom of thepiston rod 8 It is connected with thebell mouth 10; thehollow plunger pump 7 is connected with the two-way slip packer 4, and thepiston rod 9 is driven up and down by thepull rod 6.

Claims (1)

1. test string for stimulating produced liquid section of pumping unit, comprise safe core retainer plate, safe top connection, safe lower contact, bi-directional slip packer, friction piece, pull bar, hollow-plunger pump, piston rod, hollow plunger and horn mouth, it is characterized in that: described safe top connection is connected with oil pipe by the safety core retainer plate with safe lower contact, safe lower contact is connected with the bi-directional slip packer, and friction piece is positioned on the centralizer of bi-directional slip packer; Pull bar top is connected with the bi-directional slip packer, and the bottom is connected with piston rod by box cupling, and the piston rod bottom is connected with horn mouth; Hollow-plunger pump is connected with the bi-directional slip packer, and twitches up and down by pull bar drive piston rod.

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